Teeth Anatomy PDF

Incisors Maxillary Central Incisor Mandibular Central Incisor facial= trapezoidal facial = trapezoidal mesial-triangular mesial = tri...

Incisors Maxillary Central Incisor Mandibular Central Incisor facial= trapezoidal facial = trapezoidal mesial-triangular mesial = triangular incisal= triangular incisal- ovoid Maxillary lateral incisor Mandibular lateral incisor facial: trapezoid facial-rectangular mesial = triangular mesial triangular incisal-triangular incisal- ovoid offset from < cingolum center 2 distolingual twist from incisal view least square disto ineisal line angle  Canines labial ridge specific to canines ! Maxillary Canine facial-pentagonal mesial-triangular incisal-rhomboidal largecingulum 2 deep fossal Mandibular Canine facial- pentagonal mesial triangular = incisal-rhomboidal n a r rowe r than maxillary 2 fossa distal cingulum , may be of center more rounded  Maxillary Premolars First Premolar buccal-trapezoid mesial = trapezoid occlusal = hexagonal buccal cusp larger than lingual long , defined central groove mesial-marginal ridge passes marginal ridge lingual cusptilted towards mesial Second Premolar buccal = trapezoid mesial=trapezoid occlusal = ovoid cuspshorter than 1st Mesial marginal groove does n ot cross marginal ridge central groove shorter than 1st  Mandibular Premolars First Premolar buccal-trapezoid mesial= rhomboidal occlusal-diamond 2 cusps buccal cusps visible 1 ro o t Transverse ridge/ML groove Second Premolar buccal-trapezoid mesial- rhomboidal occlusal-square 2-3 cusps 1 root No transverse ridge/ML groove Buccal cusps NOT visible from lingual y-shaped central groove  Maxillary Molars First Molar : (WIDEST) - largest Crown in dentition buccal-trapezoidal Transverse : LARGEST : Oblique MB - ML occlusal-rhomboidal DB - ML 3 ro o ts (curved distally flared) y /lingual aspect highest ML is cusp of carabelli largest + of m a x molars largest - I Second Molar : LAR GEST Mesial ALL : buccal-trapezoidal trapezoidal - occlusal = rhomboidal / 12 3 roots buccal cervical ridge m o re prominent than 1st DB + ML More supplementary roots than 1st Third Molar : NO DL cusp lif present , buccal-trapezoidal lingual-distal groovel occlusal-heart-shaped Root trunk height longest-tallest Roots usually fused /buccal aspect) lobe Lingual largest Many accidental grooves (unless worn)  Mandibular Molars First Molars : - WIDEST buccal-trapezoidal occlusal-nexagonal Mesial = rhomboidal 2 roots > - widely separated , nearly vertical Distal cusp = 5th cusp Narrow cervical transverse ridge dimension MB - ML second Molar DB - DL buccal = trapezoidal occlusal-rectangular mesial = rhomboidal roots shorter- but thunk height longer cusps nearly equal Third Molar -> smallest varies the most buccal-trapezoidal - occlusal = ovoid mesial = rhomboid roots fused or separate similar to second molar cervical dim. least narrow  Maxillary Premolars Mandibular Premolars First Premolar First Premolar - buccal cusp slightly longer large buccal cusp - mesial marginal developmental - small lingual cusp pointed - - m o re groove kcrosses marginal ridge) mesiolingual developmental groove - mesial developmental depression - prominent buccal triangular - - 2 roots (buccal + lingual ridges lingual cusp tilted toward mesial - H-shaped grooves - Premolar Second Second premolar /larger than 1st) single root only premolar w/b cusps - - buccal ingual cusps equal ML > DL - - ridge could have central pit - marginal lower o n - distal Y-shaped central groove L B  Maxillary Molars - crowns wider BL than MD oblique ridge - ML t o DB - broots DB distal cusps triangular ridge to ML transverse ridge > - MB t o ML - major cusp : Mesiolingual - fossae : depressions mesial distal triangular - or to marginal ridges First Molar largest in maxillary arch - - ML > MB > DBXL - cusp of Carabelli (tubercle) ML 5th supplemental cusp · (smaller elevation) lingual of ML cusp - Palatal root) MB ) DB 3 ROOTS - - - lingual developmental groove second Molar - DL cusp smaller than 1st las roots closer tgt long /longer - than max 1st) lingual groove smaller than - Ist Buccal Maxillary Third Molar - 3 or 4 cusps - heart-shaped largest variation - - 3 cusp can still have oblique ridge  Mandibular Molars wider mesio distally than buccolingually - 2 roots ! - 4 or 5 cusps no oblique ridge - First Molar - 5 cusps upBB - distal cusp smallest - C roots : mesial + distal - lingual cusps higher transverse ridge - buccal developmental - groot w/buccal pit Second Molar 4 cusps - 2 roots - symmetrical - square mesial ridge - - round distal ridge Buccal Mesial mesial root wider than distal - mesial marginal ridge higher - than distal marginal ridge Third Molar 4 o r 5 cusps - extra grooves - roots fused close together - or buccal 1. When looking at the facial or lingual aspects of all anterior teeth, they have a: a. Trapezoidal outline b. Square outline c. Triangular outline d. Rhomboidal outline 2. What is the correct sequence of naming a tooth a. DAQT b. ADQT c. QADT d. TAQD 3. Following eruption, the root of the maxillary central incisor completes developments at what approximate age? a. 11 years b 7 n - 7-g b. 8 years 8- 9 10-11 c. 9 years 10-12 211-12 d. 7 years M12-13 e. 10 years M17-21 4. A stray tooth is found in your office. It is an anterior tooth and has a cingulum that is offset from center. What tooth is it most likely to be? a. Maxillary lateral incisor. b. Mandibular central incisor c. Mandibular lateral incisor d. Maxillary canine 5. Which of the following tooth numbers present the central incisor in the permanent dentition? a. #11,12,21,22 b. #8,9,23,26 c. #16,17,22,27 d. #8,9,24,25 7. What is the name of 19? mandibular left first molar permanent 8. Which of the following teeth shows a distolingual "twist" of its incisal edge when viewed from the incisal aspect a. Mandibular canine b. Mandibular lateral incisor - c. Maxillary lateral incisor d. Mandibular central incisor 9. The tooth form of the incisor teeth when viewed from the proximal is: a. Pentagon b. Triangle c. Trapezoid d. Rhomboid 10. A child missing front central incisors a. 10 yrs 6 7 Mz - b. 8 yrs - S 18-9 c. 4 yrs DIO-11 D10-12 E 12 d. 6 yrs n - 12-13 M17-21 11. What is the name of #10 permanent maxillary left lateral incisor 12. The tooth form of the incisor teeth when viewed from the labial is: a. Trapezoid b. Triangle c. Pentagon d. Rhomboid 3. What is the name of #24 permanent mandibular left central incisor The mesial and distal aspects of the anterior teeth maybe included within a triangle. The base of the triangle is represented by the cervical portion of the crown and the apex by the incisal edge a. First statement is false. Second statement is correct b. Both statements are false c. Both statements are correct d. First statement is correct. Second statement is false 15. Which of the following line angles is least "square"? a. Mesioincisal of the mandibular central incisor 2 b. Distoincisal of the mandibular lateral incisor c. Distoincisal of the mandibular central incisor & d. Mesioincisal of the mandibular lateral incisor 16. The universal numbering system is most widely used in the USA. The primary teeth are designated from each other using numbers, and the permanent teeth using letters a. First statement is false. Second statement is correct b. Both statements are false  c. Both statements are correct d. First statement is correct. Second statement is false 17. Permanent incisor teeth often have a trapezoidal form when viewed from the facial aspect. The wider side presents the cervical area and the narrower side presents the incisal edge. a. First statement is false. Second statement is correct b. Both statements are false c. Both statements are correct d. First statement is correct. Second statement is false 18. What is the name of #23 permanent mandibular left lateral in a sor 19. The FDI system uses two digit numbers to identify teeth. What does each digit refer to? Choose the correct order a. Arch, tooth b. Tooth, arch c. Tooth, quadrant d. Quadrant, tooth 20. Which of the following teeth surfaces has the steepest CEJ curvature a. Mesial of mandibular central incisor b. Mesial of maxillary canine c. Mesial of mandibular canine d. Mesial of maxillary central incisor Canine questions: What is the name of #5 permanent maxillary right 1st premolar The more posterior the tooth, the more apical the contact areas are placed a. True b. False 3. Which of the following teeth surfaces has the steepest CEJ curvature a. Mesial of mandibular central incisor b. Mesial of maxillary canine c. Mesial of maxillary central incisor d. Mesial of mandibular canine 4. When looking at the facial or lingual aspects of all anterior teeth, the have a: a. Rhomboidal outline b. Triangular outline c. Trapezoidal outline d. Square outline 5. The mesial and distal aspect of the anterior teeth maybe included within a triangle. The base of the triangle is represented by the cervical portion of the crown and the apex by the incisal edge a. First statement is correct. Second statement is false b. Both statements are false c. First statement is false. Second statement is correct d. Both statements are correct 6. The distal height of contour on a permanent mandibular canine is located in: a. Incisal third b. Junction of middle and cervical third  c. Junction of middle and incisal third d. Cervical third e. Middle third 7. A line angle is formed by the joining of two crown surfaces. The anterior teeth have 4 line angles, while the posterior teeth have 6 line angles a. First statement is correct. Second statement is false b. Both statements are false c. First statement is false. Second statement is correct d. Both statements are correct 8. What is the identifying number for the permanent mandibular left canine 22 9. The minimum number of lobes from which any tooth may develop is 4 10. What is the identifying number of the permanent maxillary right canine b 11. What is the name of the #16 permanent maxillary left third molar 2. Which of the following term is specific to the canines? a. Cingulum b. Lingual fossa c. Mamelons d. Labial ridge 13. A pit is the lingual lobe of an anterior tooth  a. True b. False 14. The mesial surface of a tooth is the proximal surface towards the midline a. True b. False 15. The facial height of contour on a permanent maxillary canine is located in: a. Cervical third b. Occlusal third c. Middle third d. Junction of middle and occlusal third e. Junction of middle and cervical thirds 16. The Canines are the only teeth in the permanent dentition with a vertical and centrally placed labial ridge 17. The more anterior the tooth, the more apical are the locations of the proximal contacts a. True b. False 18. Which of the following numbers are canines a. #6,11,22,27 19. What is the name of #6 permanent maxillary right canine 20. Identify the tooth in the picture by number according to the universal numbering system 27 1. all of the premolar teeth have 4 lobes. One premolar might have five, which one is it? a. Maxillary first premolars b. Mandibular first premolars c. Mandibular second premolars d. Maxillary second premolars 2. In a three-cusped mandibular premolar, which of the following best describes the order of cusp size from largest to smallest? a. Buccal, distolingual, mesiolingual b. Mesiolingual, buccal, dsiatolingual c. Sizes of the cusps are variable d. Buccal, mesiolingual, distolingual 3. The oblique ridge in maxillary molars is formed by the junction of the distobuccal and the mesiolingual triangular cusp ridge The maxillary molars have a trifurcated roots, leading to the formation of two palatal and one buccal root a. True  b. False 5. An emergency trauma patient comes into your office with both of his maxillary right premolars in hand. Which of the following features would you NOT use to distinguish the first from the second maxillary premolars? a. Presence of mesio-lingual developmental groove b. Central groove size and supplemental groove numbers c. Number of roots d. Mesial to distal cusp slope ratio 6. On the mandibular premolar, the lingual cusps are much smaller than the buccal cusps. While on the maxillary premolars, the buccal cusps are smaller than the lingual cusps a. Both statements are correct b. Both statements are false c. First statement is correct. Second statement is false d. First statement is false. Second statement is correct 7. The transverse ridge in maxillary molars is formed by the junction of the mesiobuccal and the mesiolingual cusp ridges 8. All of the following teeth might show bifurcation from the root trunk. Which one is the exception? a. Mandibular molars b. Maxillary molars c. Maxillary premolars 9. During a surgical extraction of the maxillary first molar, a rough oral surgeon accidentally perforates the maxillary sinus. If he perforated the sinus with one of the roots of the first molar, which root is it most likely to be? Given that it is the largest, longest, and strongest of the three roots?  a. Distal b. Mesiobuccal c. Distobuccal d. Palatal 10. The mesial surface of the maxillary first premolar has many unique features. Which one of the following features is not? a. Mesial concavity b. Mesial developmental depression Yc. Mesial marginal groove. d. Mesial root tip tilt 1. A fissure groove is frequently found on which of the following: (this groove is often included in occlusal tooth preparation) a. Facial surface of mandibular molars b. Lingual surface of maxillary molars c. Lingual surface of maxillary molars d. Mesial surface of mandibular molars 12. Cusp of carabelli is a fifth cusp present on the ML cusp of the maxillary first molars a. True b. False 13. While viewing the maxillary first molar from the facial aspect, three roots are visible. The palatal root is relatively shorter than the buccal roots a. Both statements are correct b. Both statements are false  c. First statement is correct. Second statement is false d. First statement is false. Second statement is correct 14. The largest of all premolars are the maxillary first and the smallest are the mandibular first 15. You buy a patch of pre-fabricated temporary crown restorations for your office for the first time. Your assistant stores all the premolar teeth in one storage box, assuming they are all the same tooth type. While attempting to sort them out, the hardest tooth to distinguish left from right will be a. Maxillary first premolars b. Mandibular second premolars c. Mandibular first premolars d. Maxillary second premolars 16. The mandibular first premolar often has a separate mesial and distal pit a. True b. False 17. Which premolar exhibits a Y shaped central developmental groove? a. Maxillary second b. Mandibular second c. Mandibular first d. Maxillary first 18. Which type of ridges is unique to the permanent maxillary molars? a. Cervical b. Marginal c. Oblique d. Transverse 9. The distal marginal ridge of the mandibular second premolar has a more apical position than the mesial marginal ridge a. True b. False 20. The lingual height of contour on a permanent mandibular premolar is located in a. Junction of middle and cervical thirds b. Junction of middle and occlusal thirds c. Cervical third d. Middle third e. Occlusal third Mandibular Molars questions: 1. Which of the following are negative consequences of malposed teeth or improperly contoured restorations? a. Food impaction b. Trauma to the gingival tissue c. Dental plaque accumulation d. All of the above 2. You buy a patch of pre-fabricated temporary crown restorations for your office for the first time. Your assistant stores all the premolar teeth in one storage box, assuming they are all the same tooth type. While attempting to sort them out, the hardest tooth to distinguish left from right will be a. Maxillary first premolars b. Mandibular second premolars c. Mandibular first premolars  d. Maxillary second premolars 3. A ridge is any linear elevation on the surface of the tooth and is named according to its location. A triangular ridge forms the border of the tooth on either proximal surface/ a. Both statements are correct b. Both statements are false c. First statement is correct. Second statement is false d. First statement is false. Second statement is correct 4. The transverse ridges of mandibular molars are formed by the junction of the MB with the ML, and the DB with the DL triangular cusp ridges a. True b. False 5. For any tooth, the mesial contact area is more toward the incisal/occlusal than the distal contact area a. True b. False The triangular ridge forms by the union of the buccal and lingual cusp ridges a. True b. False 7. Which type of ridge is unique to the molar teeth? a. Marginal b. Oblique c. Cervical d. Transverse 8. The mandibular first molars have a bifurcated root, resulting in a mesial root and a distal root  a. True b. False 9. All posterior teeth have their proximal contacts in the a. Middle third b. Occlusal third c. Cervical third d. Junction between the occlusal and middle thirds 10. The tooth has a varying presentation of its root system. It could havea bifurcated root, forming a mesial and distal root, OR partially fused roots, or completely fused roots. a. Mandibular third molar b. Maxillary first premolar c. Mandibular second premolar d. Maxillary third molar e. None of the above 11. Which of the following are true regarding interproximal contacts? a. A proper contact will help maintain stability in tooth position b. A proper contact will help prevent food impaction c. Wear of contact areas may contribute to altered interdental spacing d. a, b, and c are correct  central buccal Pit mesial - marginal ridge distal marginal ridge mess distal At lingual Sp Central develop mental greave  M 8-9 b10-1 ↳ 10-12 C11-12 M 12-13 17-21 S maxillary D left D M mandibular right  D M first premolar Pi Pz Max left  max PL right in cusp Ma max 2nd molar left ML DL us  right mandibular Mi M2 M  buccal mand left mandanda Me MB ML