A.H.E.A.D MDS / ADC / NBDE Coaching AHEAD QUICK REVIEW NOTES Concepts To Remember DENTAL ANATOMY & HISTOLOGY Academy of Higher Education and Advancements in Dentistry (A.H.E.A.D) 57/11, Old Rajinder Nagar, New Delhi – 110060 Ph: 011- 25716297, 9810187297 Email- [email protected] www.aheadacademy.com 6. are wider buccolingually than mesiodistally in both arches C.com www. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 1. Ph: 011 . The maxillary second premolar is most often single rooted. The extreme likelihood that the maxillary first premolar will have two roots has implications for both endodontics and exodontia of this tooth. The mesiobuccal root is second in size. This should be the central fossa of the counterpart. the distal marginal ridge of the mandibular second premolar and mesial marginal ridge of the first molar D. A mandibular tooth is more likely to be missing than its maxillary counterpart B. mandibular second The correct answer is A. It is also reported that some small percentage (5% in one study) are actually triple rooted. to only a small separation apically. resulting in a larger pulp chamber. It is much wider mesiodistally than buccolingually. The palatal or lingual root of the maxillary first molar is the most massive by far. When single rooted. Primary dentin surrounds the pulp chamber when the tooth is first formed and erupts. None of the above is true The correct answer is B. The level of division of the two roots varies. will begin to fill the chamber with dentin.H. If the young tooth has a given size pulp chamber.A. are wider mesiodistally in the mandible and wider mesiodistally in the maxilla The correct answer is C. later in life. the central fossa of the mandibular first molar The correct answer is D. The mesiolingual cusp of a maxillary molar is a holding cusp. and the mandibular second premolar is almost always single rooted (double roots are rarer than in the mandibular first). distobuccal C. The premolar which is most often double rooted is the: A.ahead_academy@yahoo. in absolute size. secondary dentin. The general rule for maxillary holding cusps is as follows: a maxillary holding cusp contacts the distal marginal ridge of its mandibular counterpart and the mesial marginal ridge of the mandibular tooth distal to its counterpart. further dentin formation. The largest root of the maxillary first molar is the: A. Both incisors of the maxilla are wider mesiodistally. In centric occlusion. This is known as an arch trait. the MOST commonly missing is the maxillary lateral incisor. Academy of Higher Education and Advancements in Dentistry (A. is known for the greatest assymetry in this regard. WHICH CONTACT THE CENTRAL FOSSAE OF THEIR COUNTERPARTS. Internal resorption D. A mesial tooth of a type is more likely to be missing than a distal tooth of the same type D. Both incisors of the mandible are wider buccolingually. The crowns of the incisors when viewed from the incisal A. the distal tooth is more likely to be congenitally missing than the mesial. maxillary first B. molar). palatal D. Of all of these. The mesiobuccal is often curved distally and the distobuccal curved mesially. 4. New Delhi – 110060. are wider mesiodistally than buccolingually in both arches B.com . and the distobuccal is smallest. EXCEPT FOR THE MESIOLINGUAL CUSPS OF THE MOLARS. Formation of primary dentin B. varies depending on the individual tooth The correct answer is C. A distal tooth of a type is more likely to be missing than the mesial tooth of the same type C. 3. Old Rajinder Nagar. and that difference. mesiobuccal B. in particular. and third molars are more commonly missing than first or second. mandibular first D. 9810187297.E. maxillary second C. Maxillary first premolars are almost always double rooted. is greatest for that incisor. Internal resorption is loss of dentin. 2. Formation of secondary dentin C.D) 57 / 11.aheadacademy. are wider mesiodistally in the maxilla. It is also the largest incisor. the mesiolingual cusp of the maxillary first molar will contact: A. Email. The maxillary central. expressed as a ratio. External resorption The correct answer is B. It is the initial dentin that makes up the base of both the crown and root. premolar. as it is true for both incisors of each arch. they always have two separate root canals. It is normally straight but palatally inclined. A rule regarding congenitally missing teeth is: A. So lateral incisors are missing more than centrals. In any set of teeth (incisor. the distal marginal ridge of the mandibular first molar and distal marginal ridge of the second molar C. the mesial marginal ridge of the mandibular first premolar and distal marginal ridge of the second premolar B. The mandibular first premolar is most often singlerooted. making it smaller. second premolars are missing more than first premolars. from complete division up to the crown. giving the three roots a tripod-like appearance. External resorption involves the exterior of the root and does not change the pulp chamber size. 5.25716297. and wider buccolingually in the mandible D. Which of the following will cause reduction of the size of the pulp chamber in mid-life? A. in both dimensions. the mandibular first molar. This pliers-like appearance is not found in the maxillary second and third molars. [email protected] distolingual cusp of the mandibular first molar contacts: A. The mandibular and maxillary canines exhibit similar cross sectional shapes at the cervical line. and second molars are last in both arches. second molar. Maxillary centrals and maxillary laterals average about 8 months.D) 57 / 11. as the single lingual cusp is about the same size as a mesioloingual and distolingual combined. Mandibular central B. the mandible moves toward the left. This gives the tooth a three-cusped appearance. Ph: 011 .aheadacademy. 9810187297. Remember that the right lateral pterygoid moves the mandible left. 10. a lingual groove separates the two lingual cusps. to a small extent. first molar. First molars then precede canines in both arches. resembling a cingulum. On which premolar can you see more of the occlusal table from the mesial than from the distal? A.H.25716297. 9.E. a round shape B. Maxillary second C. the left lateral pterygoid does not contract and the left condyle stays in a relatively unchanging position (it does rotate slightly). In a left working movement. A two-cusped variety also exists. maxillary second C. as the left side of the mandible is stationary. which pulp horn is likely to be smallest? A. The right lateral pterygoid contracts and pulls the right side of the mandible outward. the distal cusp is generally the smallest of the cusps of the mandibular first molar. the lingual groove of the maxillary second molar C.com . mandibular second The correct answer is D. Both lateral pterygoids contract D. so the pull of both together results in protrusion. It is also slightly higher on the distal side than the mesial. an oval shape with a slightly wider labial surface The correct answer is D. is the mandibular second premolar. Mesiolingual C. The premolar most likely to have a three-cusped appearance when viewed from the occlusal is the: A. The last primary is usually the maxillary second molar at about 24 months. The other premolars exist primarily in double-cusped varieties only. The premolars are usually considered to be two-cusped teeth (bicuspids). and the left lateral pterygoid moves the mandible right. The pulp cavity at this point is lens-shaped. The left side is then known as the working side and the right side as the nonworking (balancing) side. Which is the first primary tooth to erupt? A. an oval shape wider on the lingual than the labial C. and most commonly do so at 6 months. The first is that the mandibular first molar is a five-cusped tooth.A. This means that in a mesial view you can see some of the occlusal table because it slants toward you. Mandibular lateral C. double convex. Maxillary lateral The correct answer is A. and its mesial marginal ridge is less prominent than its distal marginal ridge. For only a left-sided movement. Maxillary first B. The higher distal end blocks any occlusal view from that direction. At the cervical line.com www. These times may vary considerably. These are commonly the first teeth to erupt. New Delhi – 110060. It is canine-like with a reduced lingual cusp. a triangular shape with a distinctly wider labial surface D. 13. Note that the two-cusped and three- cusped varieties are not grossly different in size. Tall. canine. with a large lingual cusp instead of the two smaller ones. large pulp horns. you'll often notice that a 6-month-old child will have only two teeth: the two mandibular centrals. Distal The correct answer is D. Small cusps generally have small associated pulp horns. The mandibular first premolar is the exception to premolar form in many ways. Its occlusal table tilts downward from buccal to lingual in a slanted fashion. Neither lateral pterygoid contracts The correct answer is B. 11. Mandibular second The correct answer is C. Only the left lateral pterygoid contracts B. Only the right lateral pteyrgoid contracts C. the central fossa of the maxillary first molar D. Mandibular laterals are often seen at about 9 months. Email. In a mandibular first molar. maxillary first B. The second is that the pulpal anatomy reflects the cuspal anatomy (or vice versa). Often. and then it turns left. Mesiobuccal B. the lingual embrasure between the maxillary first molar and second premolar B. Maxillary central D. lateral. If you see enough small children in your practice. Distobuccal D. In performing a left working movement: A. It is generally slightly wider at the labial end than at the lingual. The lateral pterygoids pull the mandibular condyles forward. Old Rajinder Nagar. From the distal view. mandibular first D. Mandibular first D. large cusps are likely to have tall. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 7. 8. The exception to the rule. this is not true. the lingual cusp area is divided into a mesiolingual cusp and a distolingual cusp. In this case. Know the most common order: central. the lingual groove of the maxillary first molar Academy of Higher Education and Advancements in Dentistry (A. The mandibular canine cross section is oval and flattened mesiodistally. In the three-cusped variety. a cross section of the mandibular canine would show: A. 18. they are often points of occlusal contact. the mesiolingual fossa and the distolingual fossa. Email. neither a mesial nor distal marginal ridge D. Academy of Higher Education and Advancements in Dentistry (A. a distal marginal ridge only C. the mandibular first molar distolingual cusp contacts the lingual groove of its counterpart (the maxillary first molar). The general rule for mandibular lingual cusps is that they occlude in the lingual embrasures between their maxillary counterparts and the teeth mesial to their counterparts. Ph: 011 . tissue destruction.D) 57 / 11. although they may sometimes have some less pronounced root concavities. Thus. stratum intermedium. Contacts do not protect the incisal surface. protect the alveolar mucosa D. a mesial marginal ridge only B. and plaque in that area will lead to inflammation. In this question we are dealing with the exception of the distolingual cusps of mandibular molars. Rule out all premolars. 14. as well as other anterior teeth. The alveolar mucosa begins at the mucogingival junction. with mesial and distal marginal ridges sloping down from it.25716297. Which of the premolars is most likely to have a pronounced mesial marginal groove extending into a pronounced mesial root concavity? A. This has implications for both calculus removal (scaling and root planing) and restoration (placement of well adapted matrix bands). and bone loss. protect the periodontium C. the maxillary canine. the ameloblasts and odontoblasts: A. Both dentin and enamel are deposited between these two layers. but using average eruptions. 17. By tooth completion. In between the marginal ridge and the lingual ridge. but not especially the alveolar mucosa. does have both a mesial and distal marginal ridge. along the mesial side of the crown into the proximal area (mesial concavity) and down into the mesial root concavity. stay approximately the same distance apart D. or dento-enamel junction. we find two depressions. It is not found in the other premolars. become farther apart B. as they are less distinct than on the posterior teeth. the enamel organ is at the surface of the gingiva while the odontoblasts are producing dentin for the tooth root. EXCEPT for the distolingual cusps of the mandibular molars. At age 6 1/2. they do not occlude on marginal ridges or central fossae. the ameloblasts and future odontoblasts are in contact along the length of the tooth bud. usually the mandibular centrals are in at about age 6. The maxillary canine has: A. 4-8 B. 9-12 C. 13-16 D. Therefore. Maxillary first B. are always immediately next to each other The correct answer is A. This predentin production induces the ameloblasts to begin enamel production by cells of the inner enamel epithelium. the tissues of the enamel organ-outer enamel epithelium. 15. Centrally. Contact is not involved in restoration retention. The major function of contact points in the dentition is to: A. Mandibular first D. protect restorations from poor retention The correct answer is B. an average child is MOST likely to have how many erupted permanent teeth? (Assume that you average the teeth present in a sample of 100 children). Food. debris. This can vary considerably. so in this case. become closer together C. Likewise.A. 16. Lingual cusps of mandibular teeth are guiding cusps. extending from the marginal ridge.ahead_academy@yahoo. both a mesial and distal marginal ridge The correct answer is D. and in the posterior teeth. which is more cervical and basically below the tooth region.aheadacademy. all permanent first molars usually erupt at around age 6 to 7. as they are below (cervical to) that area.E. so that makes eight so far. and predentin is laid down by odontoblasts. these cell layers are very far apart at this point. so four first molars are likely. Thus. As the tooth bud develops into a tooth. Maxillary second C. The mesial marginal groove.H. A. Early in tooth bud formation. stellate reticulum. The lingual anatomy of the maxillary canine has a cusp tip. For the incisors. Root concavities are less common and less pronounced in the mandibular premolars. not holding cusps. protect the incisal surface B. at this stage. canines usually erupt between age 9 and 12. Mandibular second The correct answer is A. and inner enamel epithelium-form adjacent to the dentin-forming tissues of the dental papilla. which occlude in the lingual grooves of their maxillary counterparts.com www. dentin is produced above the odontoblasts while enamel is formed below the inner enamel epithelium. All restorations must be retained by retention within the individual tooth itself. They do protect the gingiva. In fact.com . which generally erupt between age 9 and 12. However. The dentin production begins first. Contacts ensure that food does not get lodged between teeth and into the sulcus. is a characteristic of many maxillary first premolars. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY The correct answer is D. Mandibular laterals and maxillary centrals and laterals usually erupt between 7 and 9 years. 17-20 The correct answer is A. a lingual ridge splits the lingual surface in two. Old Rajinder Nagar. So the average 6-year-old has all first molars and mandibular centrals as erupted permanent teeth. 9810187297. and the former site of the junction of the two layers becomes the DEJ. New Delhi – 110060. Left The correct answer is D. 21. freely movable. the rule is that if a lateral pterygoid is injured. In all cases. or canines contact alone (canine/cuspid protected guidance). When the mandible moves forward (protrusion).com . their roots are shorter than those of their second-molar counterparts. making exodontia much simpler in these cases. and third molars as you move distally in the arch: 1) they decrease in mesiodistal length. It is used in rare cases where there is no mesial and distal adjacent tooth. They are most commonly found on central incisors of both arches. all of the above The correct answer is C. In effect. Academy of Higher Education and Advancements in Dentistry (A. There are normally three. As you go from mandibular first to second to third molars. the incisors are slightly out of contact during centric occlusion. The left side stays in place while the right side rotates left. in working movements C. 3 D. Lining mucosa covers most of the oral cavity except for the hard palate and gingival areas. in protrusive movements D. If you wish to understand this rule better. In general. Email. Posteriorly B. and distal. Posterior contact is normal during centric occlusion and maintains the vertical dimension of occlusion. One of the best reasons to know standard and unusual root shapes for the various maxillary and mandibular teeth is to use the correct motion on the forceps when performing extractions. buccal-lingual luxation B. Mammelons are bumps on the incisal edge of incisors. The epithelium is thin and nonkeratinized. however. 23. Roots are often partially or totally fused. rounded roots are primarily rotated. in centric occlusion B. 20. Lateral pterygoids have little effect on closing. It is usually loose. Third-molar roots may resemble normal molars or may be missing roots or have additional roots. rotation D. the mandible moves toward the injured side. but this is variable.D) 57 / 11. overall root length: A. They are often worn off on adult teeth through years of occlusion. In some cases they form a cone-like. All double and triple rooted teeth cannot be rotated and must be luxated in the buccal and lingual directions. and can almost always be rotated without breaking the crown off of the root.A. however. 22. If you like rules. Note that during retrusion (moving the mandible from centric occlusion to a more distal position). and has a well-developed submucosa. increases. The three are termed mesial. The maxillary central is invariably single rooted with a rounded root. no such contact occurs. the incisal edges of the mandibular anteriors meet the lingual surfaces of their maxillary counterparts as the teeth separate during opening. Lines the surface of the hard palate C. 24. Nonkeratinized B. they are less prominent than those found on the centrals. Freely moveable D. Now cut the left lateral pterygoid. decreases. and imagine that the left side stays in place but the right side continues to protrude. New Delhi – 110060. Right D. and if found on the laterals. 2 C. 9810187297. second. in retrusive movements The correct answer is C. central. these generalities apply to mandibular first. the root anatomy guides the dentist to use a motion that is primarily: A.H. 1 B. Severing the left lateral pterygoid will cause the mandible to move in what direction if the patient attempts to protrude? A. Contains a well developed submucosa The correct answer is B.com www. 4 The correct answer is C. Incisal contact between the maxillary and mandibular incisors is seen normally: A. While the mandibular third molar is often so variable that it is hard to make useful predictions about it. In a normal dentition. (Try it in your mouth!). the mandible will rotate around the axis of the left side. Old Rajinder Nagar. including the maxillary central incisors and maxillary canines. increases C. The lamina propria is often highly glandular. The most common number of mammelons on an incisor is: A. Which characteristic is NOT typical of lining mucosa? A. which are always smaller than those of the first molars. Closure (elevation) C. Mesial-distal motion is normally ruled out because of the existence of adjacent teeth.25716297. During working (lateral) movements. Ph: 011 . then increases The correct answer is C. imagine two intact lateral pterygoids protruding the mandible normally. mesio-distal luxation C. and 2) their roots decrease in length. Epithelial ridges and rete pegs are uncommon and short. then decreases B. decreases D.aheadacademy. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 19.E. In extraction of maxillary central incisors.ahead_academy@yahoo. only posterior teeth and canines contact (group function). fused mass. 27. A small cell layer between the inner enamel epithelium and stellate reticulum is referred to as the stratum intermedium. indicating the two roots and two canals found in the tooth. The zygoma is formed from the contact of the zygomatic section of the temporal bone and the temporal portion of the zygomatic bone. and on its medial side is found the articular capsule and joint. the gingiva and lining mucosa (alveolar mucosa) meet at the mucogingival junction. none of the above The correct answer is C.Which ligament of the temporomandibular joint inserts into the ramus and angle of the mandible? A. Its shape is biconcave. The central portion of the articular disc of the TMJ is best described as: A. The maxillary first premolar root is flatttened mesiodistally. The articular disc of the TMJ is composed of fibrous connective tissue. Lateral The correct answer is B. the mandibular first premolar is the most canine-like premolar tooth in almost every way. Sphenomandibular D. Stylomandibular C. Its fibers merge with those of the articular capsule. the mandibular first premolar has a round root cross section and a roundish pulp chamber at the cervix. Some sources state that chondrocytes are found within it. Its presence is necessary for proper ameloblast function. as is the pulp chamber. The mucosa found on the surface of the dorsum of the tongue is known as: A. The lateral ligament is also known as the temporomandibular ligament. Near the teeth. convex and avascular B. thin or absent submucosa. The outer enamel epithelium eventually merges with the gingiva as the tooth erupts. with one root.com www. maxillary first D. 26. The lateral ligament. Specialized mucosa is found on the dorsum of the tongue and contains taste buds and various papillae. and filiform. It may be constricted at the center with a corresponding hourglass shape. The characteristics of masticatory mucosa are keratinization.aheadacademy. The stellate reticulum is an ectodermal tissue located between the inner and outer enamel epithelium. masticatory mucosa C. mandibular second C. The dental papilla is mesodermal and forms pulp and dentin. lining mucosa B. The stellate. concave and avascular D. appearance of the tissue is caused by the arrangement of few cells within a network. Lateral B. It is ectodermal in origin.H. dental papilla D. The inner enamel epithelium will differentiate into ameloblasts and form enamel. Masticatory mucosa consists of the gingiva and covering of the hard palate. The sphenomandibular ligament arises from a spine on the sphenoid bone and runs forward and downward to insert on the lingula and deep ramus of the mandible.E. and only the periphery. The ligament is roughly triangular in shape. Stylomandibular C. The tissue located between the inner and outer enamel epithelium is known as: A. mandibular first B. Temporomandibular B. It descends from the lower border and tubercle of the zygoma to the posterior lateral condyle. Fibrous connective tissue composes both the ligament and capsule. with a raised outer portion and depressed middle. somewhat like that of an erythrocyte. specialized mucosa D.D) 57 / 11. 30. However.A. also known as the temporomandibular ligament. It is usually constricted at the center. The second premolar has a generally more flattened shape in the mesiodistal direction and a correspondingly oval pulp chamber. enamel organ The correct answer is A. dental sac C. is found extending downward from the lateral surface of the zygoma.ahead_academy@yahoo. with a thin lamina propria. New Delhi – 110060. Email. Old Rajinder Nagar. Lining mucosa is generally nonkeratinized. in detail. or star-like. so it is sometimes referred to as fibrous connective tissue with an underlying base of fibrocartilage. None of the above The correct answer is A. Sphenomandibular D. Academy of Higher Education and Advancements in Dentistry (A. foliate. 29. The enamel organ consists of inner and outer enamel epithelium. The premolar with a root cross section and pulp chamber shape at the cervical line which is most similar to that of a canine is the: A. stellate reticulum B. separated by intracellular fluid. including circumvallate. is less likely to be constricted into an hourglass shape. Which ligament of the temporomandibular joint merges with the fibers of the articular capsule? A. The central portion is avascular. convex and vascular C.com . stellate reticulum and stratum intermedium and forms enamel. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 25. Most of the other areas of the oral cavity are lined by lining mucosa. especially the posterior periphery is vascularized. The dental sac is mesodermal and forms cementum and the periodontal ligament. Ph: 011 . 28. maxillary second The correct answer is A. The second maxilllary premolar. and there is a fibrous connection between them. The origins and insertions of the TMJ ligaments are as follows: The stylomandibular ligament arises from the spine of the temporal bone known as the styloid process and inserts on the lower ramus and angle of the mandible.25716297. concave and vascular The correct answer is C. and tight binding of the lamina propria to underlying periosteum. 9810187297. fungiform. New Delhi – 110060. Distobuccal The correct answer is C. odontoblasts. 36. The mesial marginal ridge of the first molar and distal marginal ridge of the second premolar B.aheadacademy. Email. molar). to the ramus. It can sometimes be confused with parotid swelling. three cusps of the maxillary molar are considered to be the primary cusp triangle. Abrasion The correct answer is C.com . It has a wide variety in morphology and is usually extracted. and fourth maxillary molar. and the distal marginal ridge of the maxillary tooth mesial to their counterpart. The mesiobuccal cusp of a mandibular molar is a holding (supporting) cusp. The general rule of occlusion of mandibular holding cusps is as follows: the holding cusps of the mandibular teeth occlude on the mesial marginal ridge of their maxillary counterpart. Ph: 011 . It can be noted on the face as: A. Remember that the medial pterygoid is medial. the DL. the distal tooth is more likely to be congenitally missing than the mesial. Action of dentin-forming ameloblasts D. Extreme bruxism over time may cause masseteric hypertrophy. A distal tooth of a type is more likely to be missing than the mesial tooth of the same type C.ahead_academy@yahoo. A rule regarding congenitally missing teeth is: A . None of the above is true The correct answer is B. A mandibular tooth is more likely to be missing than its maxillary counterpart B. In this case. THE DISTAL CUSP OF THE MANDIBULAR FIRST MOLAR OCCLUDES WITH THE DISTAL TRIANGULAR FOSSA OF ITS COUNTERPART. Old Rajinder Nagar. etc. This cusp is less conspicuous as you go from first to second to third maxillary molar. Second lateral incisor C. The same is true for other factors. Masseteric hypertrophy means gain in muscle substance of the masseter muscle. Age of tooth C. It is the most common and frequently causes a diastema between the central incisors. EXCEPT DISTOBUCCAL CUSPS OF MANDIBULAR MOLARS OCCLUDE WITH CENTRAL FOSSAE OF THEIR COUNTERPARTS. Mesiodens B. Which is the most common supernumerary tooth? A.25716297. Third mandibular D. Swelling in the lateral mandibular ramus area C. Fourth maxillary molar The correct answer is A. The distal marginal ridge of the first molar and mesial marginal ridge of the second molar C. People who brux (express tension by clenching their teeth) often develop this larger-than-normal size masseter. and its growth in thickness can be seen as a squareness of the lower face on frontal view. and are the MB.E. 9810187297. heavy occlusal wear.com www. They form the trigon. 33. In any set of teeth (incisor. Academy of Higher Education and Advancements in Dentistry (A. Mesiobuccal C. The mesiobuccal cusp of the mandibular first molar occludes with which maxillary tooth surfaces? A. influence pulp size because the pulp is surrounded by dentin. The distal triangular fossa of the first molar The correct answer is A. So lateral incisors are missing more than centrals. third mandibular premolar. Which cusp of the maxillary molar is NOT part of the trigon (primitive cusp triangle)? A. Distolingual D. The embrasure between the first and second molars D. is considered to be a minor cusp. The fourth cusp. Which factor does NOT affect pulp cavity size in a tooth? A. The other relatively common supernumeraries are the second maxillary lateral incisor.D) 57 / 11. In evolution. Loss of muscle substance would be atrophy rather than hypertrophy. not lateral. Caries B. and the tooth mesial to it is the second premolar. or talon cusp. such as abrasion. second premolars are missing more than first premolars. Swelling on the medial surface of the jaw D. Swelling in the area of the temporal fossa B. as dentin formers. and is known evolutionarily as the talon. Mesiolingual B. Pulp tends to become smaller and more calcified with age. and third molars are more commonly missing than first or second. AND THE FIRST PREMOLAR OCCLUDES ONLY WITH THE MESIAL MARGINAL RIDGE OF ITS COUNTERPART (BUT NOT THE CANINE). 35. Loss of muscle substance near the ramus The correct answer is B. 34. although the parotids are slightly higher in location. The masseter is located on the lateral part of the ramus and angle. and the original three cusps of the evolving molar. 32. Caries may cause deposition of reparative or secondary dentin. and DB cusps. ML. A mesiodens is a supernumerary located midline in the maxilla. the maxillary counterpart is the maxillary first molar. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 31. premolar. is the smallest.A.H. erosion. A mesial tooth of a type is more likely to be missing than a distal tooth of the same type D. so age is also a factor. In the radiological studies of tooth formation there are at least three stages …………………………………………….A. The main bulk of tooth is composed of………………………………… 11. 2. 8. …………. ……………………. Old Rajinder Nagar. Dental age assessment based on the basis of the number of teeth at each chronological age was given by ……………………………….25716297. New Delhi – 110060... ………………………is formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp of maxillary molar. The postnatal period of development of the primary dentition spans about …………………. Nolla expanded it to ………stages and Gleisen & Hunt into …………. Ph: 011 . The specifications used for carving individual teeth for the permanent dentition is given by …………………. 20. 17.ahead_academy@yahoo. 18. Academy of Higher Education and Advancements in Dentistry (A. 9810187297.year. 13. Calcification of the primary dentition begins by ……………….is a linear elevation on the surface of a tooth.E. 21.is one of the primary sections of formation in the development of the crown. The dental formula for primary dentition in humans is…………………. 23.descends from the tips of the cusps of molars and premolars towards the central part of the occlusal surface..com . 3.. 19. Dental age assessment based on the stages of formation of crowns and roots of teeth was given by ……………………………………….. 7. 12. The dental formula for permanent dentition in humans is……………. Universal system for primary dentition is ……………………………………. 14. The system which is acceptable to computer and computer languages is the universal system. Universal system for permanent dentition is………………………………… 6.. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 1. 5.aheadacademy.H. …………………………. 22..angle is formed by the junction of three surfaces. 4.. ……………………. The two digit system for primary dentition is………………………………. Dental age assessment in the mixed dentition based on the amount of resorption of roots of primary teeth and amount of development of permanent teeth was given by …………………………. Stages.com www.. ……………. The two digit system was proposed by ………………………………………… 10. 16. 15. Email. 9. Tooth formation that may be divided approximately into a number of stages that covers continuously the development of teeth was given by……………………………………………….D) 57 / 11. (True/ False). The two digit system for permanent dentition is………………………….and takes ……………………years to be completed..angle is formed by the junction of two surfaces. 25. 37. Ph: 011 . The arrangement of natural teeth was described originally by …………………………………. 49. Academy of Higher Education and Advancements in Dentistry (A. The separation of primary anterior teeth due to growth of the jaws is usually seen during ……………... (Rest period) 34.instead of …………………… in permanent dentitions...ahead_academy@yahoo. Crown of deciduous ……………………… molar resembles a permanent maxillary premolar. ………………………………………cusp of the maxillary first molar is most prominent ..and ………………………. 48. Root resorption of deciduous teeth begins after ……………………. 35.. Formation of permanent teeth as occurring in cluster was described by ………………………………………… 28... longest and sharpest. ……………………... Cervical ridges present buccaly on primary teeth are more pronounced in ………………….teeth. 9810187297... Transition from primary to permanent dentition begins at about…………………………..... Old Rajinder Nagar. Crowns of the …………… anterior teeth are wider mesiodistally in comparison with their crown lengths.E. 40. The primary function of pulp is …………………………………………….year. 42. The deciduous tooth which is unique in that it has a crown form unlike that of any permanent tooth is…………………… 33. all the teeth occlude with two teeth in the opposite jaw except……………….…....teeth.. 45... The primary teeth are also called ……………………. 26.. The simplest form of tooth with single cones in the reptilian stage is called …………………………. The highest peak of caries attack occurs at……………….. Sequence for primary teeth eruption is ………………………….. 38.tooth is diamond shaped. When the maxillary and mandibular primary teeth occlude../. Each permanent tooth takes approximately ………………………. From the incisal tip. The enamel rods at the cervix slope ………………….A. 31...years of age..is the largest cusp of the primary mandibular first molar 47./………………. Mesial slope of the cusp is smaller than distal slope in……………………………. Email. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 24.. 39. 50.. The cusp of carebelli of deciduous dentition is found on………. 32.com www.. The primary tooth which resembles the permanent maxillary first molar is ……………. The first teeth of the permanent dentition to emerge through the gingiva is……………and it begins to calcify at………… 29..H.years of age.. A sharp and prominent mesiolingual cusp which is almost entered lingually but in line with the mesial root is an outstanding characteristic feature of ………………………………. 36. 43... the crown of primary……………….. Bifurcation of the roots of the primary first molar begins almost immediately at ………………………….. New Delhi – 110060. 44.. 41. 27.com ..years or complete formation.25716297.years. The cusp of the primary canine is …………………………&……………. 30.aheadacademy. after it is completely formed. than permanent canine. 46.D) 57 / 11. 9810187297. The stage which exhibits three cusps in line in development of post teeth with largest original cusp centered with smaller cusps located ant. Triangular stage or tritubercular molars are seen in…………… 53.. Final evidence of calcification of maxillary first premolar is . 70. ………………….com www. ……………………. …………………………means tooth bearing conical cusp and are seen in …………………..is the longest teeth in the mouth... Old Rajinder Nagar... 78.. tooth most likely to have a bifurcated root is………. First evidence of calcification of maxillary 2nd premolar is …………… 75.......25716297.... 68.. And post. First evidence of calcification of mandibular central incisor is………………… 66. 62. 67.... First evidence of calcification of maxillary lateral incisor is at………………... The distinguishing features between the 1st and 2nd maxillary premolar from the mesial aspect is…………………...H.... The tooth that varies in form more than any other tooth in the mouth with the exception of third molars is ……………… 63.A. ..... 59.. First evidence of calcification of maxillary canines is………. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 51.present on first premolar.. 64... ………………………….is the most prominent teeth in the mouth...... Each tooth in the dental arch has two antagonists in the opposing arch except ……………………………..... Enamel completion of maxillary first premolar is…………………..... 55. The ant... 72......are considered to be the cornerstone of the dental arches...... ………………………root is the longest in the maxillary first molar.E..ahead_academy@yahoo. Academy of Higher Education and Advancements in Dentistry (A.. New Delhi – 110060... Root completion of maxillary canines is……………………… 69....cusp is the smallest in the maxillary first molar. 76...... 65.... 60...... The only tooth which is wider lingually than buccally is ………. 61.. The largest tooth in the maxillary arch is………………. 74..... Root completion of maxillary central incisor is…………………………………. Is…………………. Ph: 011 ... 52.. .. Email.. 58.. 57...D) 57 / 11.com ..aheadacademy..... 77. In the maxillary premolar the tooth in which the mesial cusp slope is longer than the distal cusp slope is………………… 71. 56... Quadritubercular molars are seen in ………………………… 54..... 73...is the widest teeth mesiodistally among the anteriors. Enamel completion of the maxillary central incisor is about . …………………is the smallest teeth in the dental arch. First evidence of calcification of maxillary central incisor is at…………………………. and………………………. when seen from the lingual aspect of the mandibular first molar.form when seen from the occlusal aspect.. 9810187297. The muscle which is principle positioner of the mandible during elevation is…………………………. The mandibular canal is directed ………………………………………. Major portion of the canine fossa is directly above the roots of …………………………………………teeth.E. Pantograph and kinesiograph are equipments used to record ……………………. they are………………………..hypothesis of tooth origin. There are two canals which open laterally into the incisive foramen . 108. The tooth in the maxillary arch in which the crown is wider mesially than distally and wider lingually than buccally is …………… 83. Ph: 011 . 99.. 86.. The maxillary sinus is also known as…………………………………… 92.25716297. Enamel completion of maxillary first molar is………………………. 109. The two major and two minor fossa present on the occlusal aspect of the first molar is…………………………. 107. Root completion of the maxillary 2nd molar is completed by ………………………... 80. 85. The otomandibular ligaments which connect the middle ear and TMJ are…………………. Academy of Higher Education and Advancements in Dentistry (A. ……………………is present between the condyle and coronoid process. The duration of chewing cycle varies from………………….D) 57 / 11. Buccal aspect of the mandibular first molar is …………………….e. 81. Max. 84. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 79. New Delhi – 110060.. First evidence of calcification of maxillary third molar is…………… 87. The masseter muscle is partly covered by 2 muscles.A. 91. Morphological categories used to describe the occlusal surfaces of mandibular molar are based upon a topology developed by………………………………………………..ahead_academy@yahoo. 89. 101. Foramen of stenson carries ………………………………………. 96. The mesiolingual and distolingual cusp incline at the cusp tips to form an angle of ……………………..and………………………….aheadacademy.. 106.. 82. 93. The maxillary molar primary cusp triangle supposition follows the …………………………. The lateral pterygoid muscle has two heads i. Old Rajinder Nagar. opening movement of TMJ is…………………. 104. Max lateral opening in the absence of TMJ muscle dysfunction is ………………………………. 97. head which is active during various jaw closing movements and head active during jaw opening movements is………………………. Email. 88. they are……………………………………….com .. Root completion of maxillary first molar is………………………….. 105. The mandibular first molar has ……………………….com www. 103. ………………………. The maxillary tuberosity is the origin for some fibres of the masticatory muscle……………………………………… 94.. hyalinized and devoid of nerves is…………………………. 90.. The portion of the articular disc which is avascular. 95. 98. 100. superior and inferior heads.H.is the heaviest and strongest bone of the head. The cusp of carabelli is usually found lingual to …………………………cusp of the maxillary first molar. Posterior to the third molar a triangular shallow fossa is outlined called …………………………………………………. Max protrusive movementapproximately is………………………. and………………………… 102.. The tooth that is commonly seen in an abnormal relation and contact with its adjacent teeth of the 3. Teeth is A) One A) Buccal B) Distal C) Lingual D) B) Two Occlusal C) Three D) Four or more 14. 9810187297. Tritubercular class of teeth are present in C) At birth A) Humans B) Dog D) In 3rd month of extra uterine life C) Lizard D) All of the above 18. Anisognathus refers to drifting of permanent first molar A) Unequal teeth B) Non-uniform teeth D) The child may never develop premolars C) Unequal jaw D) Unequal cusp 19. AHEAD Test and Discussions – DENTAL ANATOMY & HISTOLOGY 1. This present in shows A) Apex of the root B) Tip of the cusp A) It is too early to make final prediction C) Center of the crown D) Center of the tooth B) The teeth may develop later C) Primary second molar extracted to allow mesial 9. The facial aspect of all teeth is represented by usually around A) Trapezoidal form B) Triangular form A) 4 months in utero B) Birth C) Rhomboid form D) None of the above C) 4 months after birth D) One year after birth 11.D) 57 / 11.aheadacademy. Ph: 011 . New Delhi – 110060.E. lingually. Old Rajinder Nagar. First evidence of initiation of primary dentition is 10. A radiograph of 4-year old child reveals no evidence 8. The last primary tooth to be replaced by a permanent tooth is usually the 5. a 4 year old boy was on tetracycline therapy. The calcification and eruption of both deciduous and permanent teeth was given by 12. The primary center of formation of each lobe is of calcification of mandibular second premolar.H. premolars and 2nd molars D) None of the above D) Incisors and 1st molars Academy of Higher Education and Advancements in Dentistry (A.com www. Largest embrasure lies between A) Nolla A) Maxillary central incisors B) Anderson B) Maxillary central and lateral C) Logem and Kronfeld C) Maxillary canine and first premolar D) Mc Call and Schour D) Maxillary lateral incisor and canine 2. Divergence from contact area in proximal surfaces causes embrasures 4. The mesial contact area of the permanent canine is 20. cervically&occlusaly C) Palatal aspect of maxillary molar D) Palatal aspect of maxillary premolar 16.25716297. Email. Calcification of permanent first molar usually begins A) Curve of spee B) Curve of Wilson in the C) Curve of Monson D) None of the above A) Third month of IU life B) 6th month of IU life 7. The tubercle carabelli is present on the A) Facially B) Lingually A) Lingual aspect of the mandibular molar C) Cervically B) Lingual aspect of mandibular premolar D) Facially. at the Discoloured teeth will be A) Middle third A) Premolars.There is a greater chance for furcation involvement in same arch deciduous teeth as A) Mandibular first premolar a) Pulp chamber is bigger relatively and more B) Mandibular lateral incisor superficial C) Maxillary central incisor B) They are more prone to infection D) Maxillary lateral incisor C) Bone of children is soft D) None of the above 15. The largest embrasure in post.ahead_academy@yahoo. The basis to describe the lingual inclination of the mandibular molars is 17.com . Ram. The number of centers for formation of each tooth are 13. The arrangement of natural teeth was described by A) Maxillary second molar A) G V Black B) Bolton B) Mandibular second molar C) Wilson D) Graf Von Spee C) Maxillary canine D) Mandibular canine 6. incisors and 1st molars B) Junction of incisal and middle third B) Canines and 2nd molars C) Junction of middle and cervical third C) Canines.A.