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Dental Anatomy Facts
| Question | Answer |
|---|---|
| Which primary tooth has the most distinctly prominent facial cervical ridge | Md 1st molar |
| Lingual cusp of maxillary premolar is offset in which direction | Mesially |
| Which maxillary premolar is more offset | The maxillary first premolar |
| Does the primary second molar exhibit a cusp of Carabelli | Yes, generally |
| Mamelons that remain after 10 years of age indicate what | An open bite |
| These teeth typically only occlude with one tooth | Mandibular central incisors and Maxillary third molars |
| The developmental groove between the df and dl cusps of the mandibular first molar is | Distofacial |
| The roots of the maxillary second molar tend to be | Less divergent and a greater distal inclination |
| The teeth primarily used for biting are | The incisors and canines |
| The tooth with the longest root | Maxillary Canine |
| Groove pattern for mandibular first molar is | Y or dyopethicus pattern |
| Groove patter for the mandibular second molar is | Cross or + pattern |
| When compared to the maxillary canine, the mandibular canine has contact areas that are | located more incisally |
| The mandibular 1st premolar has a mesial marginal ridge that is ___ compared to the distal | more cervical than the distal |
| The Oblique ridge of maxillary molar forms what boundary | The distal boundary of the central fosssa |
| A transverse ridge form from the union of | the facial and lingual triangular ridges |
| For multi-rooted teeth, dentin continues to form most rapidly at what places | The floor and roof of the pulp chamber |
| Maxillary incisors are the only anterior teeth that | Are wider mesio-distally than than faciolingually |
| Maxillary incisors are the only maxillary teeth that | Are wider mesio-distally than than faciolingually |
| Mandibular molars are the only posterior teeth that | Are wider mesio-distally than than faciolingually |
| Mandibular molars are the only mandibular teeth that | Are wider mesio-distally than than faciolingually |
| Mandibular first molars usually have how many roots and canals? | Two root and three canals |
| Mandibular first molars usually have the two canals where? | Two mesial canals |
| The primary maxillary second molar tends to be the only primary tooth with | An oblique ridge, generally |
| The ML cusp of the maxillary molars tends to occlude where | The central fossa of the mandibular molars |
| The DB of the mandibular molars tends to occlude where | The central fossa of the maxillary molars. |
| The primary second molar exhibits more _____ than the primary first molar | More cusps |
| The occlusal outline of a mandibular first molar is what shape | A pentagon |
| The lingual concavity of the maxillary anterior teeth is most influenced by | The side shift of the mandible |
| The side shift of the mandible is known as | Bennett Movement |
| The contact between an Mx central and lateral incisor makes the lingual embrasure | Larger than the facial |
| The non-molar tooth that most frequently has a mesial and distal pulp horn is | The maxillary central incisor |
| The cervical ridge is most prominent for primary maxillary teeth on the | MF surface of the 1st molar |
| Dentin that is mostly highly mineralized is | Intra- or peritubular dentin |
| The primary spacing for the anterior teeth is most frequently caused by | The growth of dental arches |
| The nonworking condyle moves | downward, forward, and medial |
| The non-molar tooth that most frequently exhibits three roots is | The maxillary 1st premolar |
| The only tooth that has potential of contacting both anterior and posterior teeth is then | Maxillary canine |
| The MF and DL angles from occlusal outline tend to be what type of anglle | Acute |
| The ML and DF angles from occlusal outline tend to be what type of angle | Obtuse. |
| The obtuse corners tend to coincide with the direction of what grooves | The oblique ridge |
| The maxillary first molar is what shape when viewed from the occlusal view | Rhombiodal |
| How many teeth of the permanent dentition has cingulums? | 12 teeth |
| What anterior tooth most frequently exhibits a bifurcated root? | The mandibular canine |
| What is the direction of the bifurcation of mandibular canine? | Facial and lingual |
| Cross section of the mandibular canine a the CEJ presents as | Ovoid, and wider mesiodistally at the labial |
| The non-molar tooth that is least likely to have a bifurcated root | Maxillary Central incisor |
| The size and position of the cusps are more identical for the | 2nd maxillary premolar than the first |
| The maxillary tooth with the most pronounce develpmental marginal groove is | The maxillary 1st premolar |
| The Y type mandibular premolar has what type of cusps | one facial and two lingual cusps |
| The most bilaterally symmetrical primary and permanent teeth are the | Mandibular central incisors |
| The tooth with the most prominent marginal ridges of the anterior teeth is | Maxillary Lateral incisors |
| The most distinct and deepest lingual fossa's of all anterior teeth is | Maxillary Lateral incisors |
| The posterior tooth that has the greatest cervico-occlusal crown height is the | Maxillary 1st premolar |
| The oblique ridge connects which cusps | ML and DF cusps |
| The occlusal outline for the mandibular first premolar is what shape | A diamond shape |
| The last primary tooth to erupt is the | Maxillary second primary molars |
| The softest dental tissue is | Cementum |
| The hardest dental tissue is | Enamel |
| All premolars are wider | faciolingually than mesiodistally |
| The cusps of the Maxillary 2nd Premolar are | Equal height |
| The upper compartment of the tmj is the space between | The disc and the articular fossa/eminence |
| When present, where is the 4th pulp canal of the maxillary first molar? | The mesiofacial canal |
| The crown form of the canines from a facial view is the | Pentagon |
| Mandibular central incisors have contacts that are _____ on the mesial as the distal | at the same height level |
| What about the Maxillary 1st premolar has a _____ that makes it difficult to adapt the matrix band | Mesial concavity |
| The arrangement of the teeth when viewed from the occlusal is | Parabolic |
| The posterior teeth are aligned how when viewed from the occlusal? | A straight line |
| The only primary tooth to have an oblique ridge, transverse ridge, and a DL groove is | The maxillary second primary molar |
| The thickest section of the articular disc in the sagittal plane is at | The posterior border |
| Other than 3rd molars, what tooth exhibits the most crown morphology | The maxillary lateral incisor |
| Which fibers of the PDL provide the major support during function? | The oblique fibers |
| The largest root of the maxillary molar | The palatal root |
| The smallest root of the maxillary molar | The distofacial root |
| The pulp chamber of a mature tooth contains | blood vessels and nerves |
| The primary mandibular primate space is located between what teeth? | The mandibular canine and first molar |
| The occlusal table of a posterior tooth makes up what percentage of its total faciolingual dimension? | 55-65% |
| In a healthy mouth, where is the alveolar process the thinnest? | The facial of the mandibular central incisors |
| The crown of the mandibular second molar inclines to the | Mesial and Lingual |
| The epithelial attachment is always an actual part of the tooth's | Periodontium |
| Continued eruption of a tooth through the surrounding tissue makes the clinical crown appear | Longer |
| The maxillary primary first molar has a crown that somewhat resembles a | Permanent premolar |
| The maxillary primary first molar has a root that resembles a typical | Permanent molar |
| Anterior guidance plays the greatest role in discluding the posterior teeth in | latero-protrusive movement |
| The mandibular 2nd premolar from the occlusal view has what basic shape | pentagonal |
| The ligament around the TMJ serve to | Protect surrounding and supporting tissues from damage |
| Along the facial surface of the primary mandibular 1st molar, the CEJ is most apical at | The Mesial 1/3 |
| What tooth has the greatest m-d diameter of all the molars | The mandibular 1st molar |
| Other than 3rd molars, the most common congenitally missing tooth is the | Maxillary lateral incisors |
| The mesiodistal width of the mandibular lateral incisor is ___ than the mandibular central incisor | Wider |
| The mesiodistal width of the maxillary later incisor is _____ than the maxillary center incisor | Narrower |
| The key feature that differentiates a mandibular 1st and 2nd molar is the number of | Developmental Grooves |
| A second key feature that differentiates a mandibular 1st and 2nd molar is the number of | Number of Cusps |
| The incisal embrasure between the maxillary centrals is ___ than between the central and lateral | Smaller |
| The premolar that has a longer mesio-facial cusp ridge than disto-facial cusp ridge is the | Maxillary 1st premolar |
| The facial cusp of the maxillary 1st premolar is offset to the | Distal |
| Common trait of maxillary premolars is that the lingual cusp is | offset to the mesial |
| In molars, the root canals join the pulp chamber at what point? | Apical to the CEJ |
| These periodontal fibers travel from one root to an adjacent root surface | Transeptal fibers |
| Pattern of Eruption of primary teeth | centrals, laterals, 1st molars, canines, 2nd molars |
| If a mandibular 1st premolar has a second canal, where is it likely located | to the lingual |
| The mesiolingual developmental groove on #21 originates from | the occlusal pit |
| The mesiolingual developmental groove on #21 extends onto | The proximal surface |
| Physiologic rest is established when the muscles of mastication are in | Tonic equilibrium |
| Overjet and overbite provides protection to | the lips, the cheeks, and the tongue |
| What areas of an anterior tooth is the first to calcify | the incisal ridge |
| The maxillary first molar has a _____ DL groove than the second molar | Shorter |
| The principle muscle to retract the mandible | Posterior fibers of the temporalis |
| The formation of excess calcified tissue formation at the root apex | Hypercementosis |
| The mid root cross section of t mandibular first molars is largest in the | Mesial |
| The premolar with the steepest cuspal inclines is | The maxillary first premolar |
| The Primary mandibular 1st molar usually exhibits what kind of fossa | A distal triangular fossa |
| The Maxillary lateral incisor is usually ______ than the maxillary central in root length | Equal to or longer |
| The distoincisal angle of the maxillary lateral is what compared to the rest of the maxillary teeth | The greatest convex |
| Anterior teeth when viewed from the proximal are what shape | Triangle |
| Which cusp of the Maxillary first molar is not part of the molar cusp triangle | The DL cusp |
| The Maxillary central incisors have contact point that are | at the same incisocervical level |
| Mandibular molars long axis of root apices are ____ and the crown is ____ | Facial apices, lingual crowns |
| Caries stimulates the production of | Secondary dentin |
| The largest cusp of the mandibular first molar is the | Mesio-facial cusp |
| In cervical cross section the root of the mandibular canine is flattened in a | Mesio-distal direction |
| The primary central incisor exhibits a prominent cervical ridge on | Both the facial and the lingual |
| What is the predominant connective tissue for the periodontal ligament fibers | Collagenous |
| The mandibular 1st premolar has a uniquely prominenet | Triangular ridge |
| The mandibular 1st premolar typically has a separated | Mesial and Distal Pit |
| The temporomandibular ligament limits | jaw opening |
| The temporomandibular ligament initiates what movement? | Translation of the condyle down the articular eminence |
| The tooth most likely to be forced into the maxillary sinus during extraction | The maxillary first molar |
| The styloglossus is an extrinsic muscle of the tongue that causes what motion | Tongue retraction |
| From a facial view, the lingual root is in line with the | Facial groove of the tooth |
| The premolar that is most likely to have a crescent shaped central groove is | The mandibular 2nd premolar |
| The maxillary 3rd is the molar that most frequently | has only 3 cusps |
| The identifying characteristic of the mandibular 1st premolar is | The mesiolingual groove |
| When does Bennett movement occur | In the earliest stages of lateral movement |
| What muscle is largely responsible for protrusive movement? | The lateral pterygoids |
| The lingual cusp of the mandibular first premolar is approximately ____ the height of the facial cup | 2/3 |
| The first succedanous tooth to erupt in the mouth is the | permanent mandibular central incisor |
| The Y type mandibular 2nd premolar has the same number of occlusal pits as the | Mandibular 1st molar |
| From a facial or lingual view, canines are what shape? | Pentagonal |
| The Maxillary 1st molar has a ______ that poses a problem for matrix placement? | Distal Concavity |
| The cervical cross section of the maxillary 1st premolar exhibits what shape | A kidney shaped root line and a kidney shaped pulp chamber |
| The lobe of the maxillary canine that included the cusp tip is | The Middle Facial Lobe |
| The number of lobes for anterior teeth is | 4 Lobes |
| The number of lobes of posterior teeth is determined by the | Number of cusps |
| The anterior-posterior curvature of the occlusal surfaces as seen in a facial view | The curve of spee |
| Which PDL fibers reduces the likelihood of forceful impaction into the alveolus | The oblique fibers |
| The facial height of contour is located where on all teeth? | The gingival third |
| The apex of the triangular-shaped boundary of the interproximal space is the | Contact area of the teeth |
| From the facial view of the primary canine, which slope is longer | The mesio-lingual slope is longer tha the distoincisal |
| The cusp tip of the primary canine is generally off set to the | Distal |
| A primary molar lacks an identifiable | Root Trunk |
| The Maxillary canine from a proximal view tends to be positioned | with the most nearly vertical axis |
| The cemental union 2 fully formed teeth that were originally separate entities | Concrescence |
| The apex of a tooth is fully formed when | 2-3 years after eruption |
| _____ is the prime mover when making left working movement | Right lateral pterygoid |
| The mesial surface of the crown of the mandibular canine is almost parallel to | almost parallel to the long axis of the tooth |
| The smallest cusp of the mandibular 1st molar is | The distal cusp |
| The cross sectional outline at the cervical is roughly triangular for which tooth | The permanent Maxillary 2nd molar |
| The TMJ has how many synovial cavities | 2 |
| The cervical line of permanent teeth has the greatest depth of curvature on the | Mesial aspect |
| From a proximal, the incisal ridge of the crown is on line with | the center of the tooth |
| What tooth has the smallest facilolingual crown dimension | The primary mandibular central incisor |
| Which primary tooth has the most distinct transverse ridge | the primary mandibular 1st molar |
| Movements of the condyle on the working side | Rotates and Translates laterally |
| From the occlusal view, the area with the greatest faciolingual diameter on the mandibular 2nd molar is | the mesial 1/3 |
| From which proximal surface on a mandibular first premolar can the most occlusal surface be seen | The mesial surface |
| The bodily shift of the mandible towards the working condyle is called | The Bennett Movement |
| What feature of the Maxillary lateral incisor complicates root planning? | The distolingual groove |
| Normal enamel apposition results in grooves called | Perikymata |
| Oblique periodontal fibers are most likely found in the | middle 1/3 of the root |
| The mandibular centrals and laterals tend to have concave areas where | Mesial and distal root surfaces |
| The mandibular canine has a _______ cingulum than the maxillary canine | Less Prominent |
| The mandibular canine is ______ mesiodistally than the maxillary canine | narrower |
| Which canine has a continuous convex facial surface from incisal to apical edge | The mandibular canine |
| Accessory pulp canals may contain | Blood vessels and nerve tissue |
| Accessory pulp canals may be found in the | Cervical third of the root |
| Accessory pulp canals may also be found in what area of molars | The furcation area |
| Accessory pulp canals allow the pulp to communicate with | The periodontal ligament space |
| The TMJ is protected by these factors | Synovial fluid, Fibrocartilage, ligament suspension, and masticatory muscles |
| Surfaces of molars most prone to fracture | Lingual of Maxillary and Facial of Mandibular |
| What is the function of the pulp? | Form and provide nutrients to dentin and transmit sensory information |
| In the delayed resorption of primary incisors the permanent incisors tend to | erupt lingual |
| What moves the disk of the TMJ forward is the | Lateral pterygoid |
| The roots of primary molars are ___________ than those of permanent molars | More divergent |
| The primary teeth that dffer the most from permanent teeth are the | Primary 1st molars |
| The highest and sharpest cusp on a primary mandibular first molar is the | Mesiolingual |
| What tooth has the greatest facio-lingual axial inclination? | The maxillary central incisory |
| The primary function of the dental pulp is to form | Dentin |
| The shortest interdental papilla is between the | mandibular second premolar and first molar |
| In cross section the root of the mandibular canine is | irregularly oval |
| The percentage of dentin that is organic is | 20-30% |
| The anterior tooth that is most likely to have a lingual pit cavity | Maxillary Lateral Incisor |
| Calcification of the primary root is usually complete by | 3-4 years of age |
| Are interradicular fibers a type of periodontal fiber | NO! |
| What percentage of permanent root formation is complete when a tooth erupts? | approx 50% |
| What tooth has the greatest faciolingual diameter of the crown for all teeth | The Maxillary first molar |
| What almost elusively determines Intercuspal position | Tooth contact |
| Physiological rest position is considered | a muscle guided position |
| Centric relation is considered | a ligament guided postion |
| Centric occlusion is also known as | Intercuspal position |
| The ideal position and height of _________ of Mandibular 1st molar accommodates working movements | Lingual cusps |
| Longest root | Maxillary Canine |
| Which premolar most frequently has a single central pit | The mandibular 2nd premolar |
| What separate cusp ridges from marginal ridges | Developmental grooves |
| What tooth is most often in abnormal relation and contact with adjacent teeth? | Maxillary Lateral incisor |
| The lingual cusp of a mandibular 1st molar is similar in development to the cingulum of a | Canine |
| During non mastictory swallowing, teeth are | in contact in intercuspal position |
| This posterior cusp is the largest and longest | The mesiolingual cusp of the maxillary 1st molar |
| Contraction of the Lateral pterygoid produces what movement of the condyle | Forward movement from the articular fossa |
| The maxillary 1st molar has a wider m-d width towards the | Facial than towards the lingual |
| Physiological rest position is also known as | Postural Position |
| What primary tooth that most often bears resemblance of a premolar is | The maxillary primary 1st molar |
| In Posselt's envelop of motion, maximum intercuspal position is at | the most superior point |
| The molar that has the most distinct transverse ridge, which separates the mesial fossa is | The mandibular 1st molar |
| The glenoid fossa is a depression in the _________, it's located just anterior to the _______ | Temporal bone, anterior to the auditory canal |
| The center of the oblique ridge on a maxillary 1st molar is _______ compared to the marginal ridges | on the same level |
| The developmental abnormality characterized by presence of fewer teeth than usual | Oligodontia |
| The nonmolar tooth having the sharpest demarcation between pulp chamber and canal | Maxillary first premolars |
| What covers the articulating osseous structures of the TMJ | Dense Avascular Fibrous Connective Tissue |
| What premolar is the only premolar that frequently only has one pulp horn? | The mandibular 1st premolar |
| The facial surfaces of the mandibular molars are located _____ to the border of the ascending ramus | Medial |
| The facial masticatory mucosa (attached gingiva) is narrowest for the | Mandibular 1st premolar |
| What occurs at the junction of the dental papilla and the inner enamel epithelium | The Dentoenamel junction |
| Which furcation on the maxillary 1st molar is the closest to the cervical line | The mesial furcation is the closest |
| Which furcation on the maxillary 1st molar is the furthest to the cervical line | The distal furcation is the furthest |
| Is the lateral pterygoid an elevator muscle? | NO |
| Does the periodontal ligament function to maintain epithelial attachment? | no |
| PDL fibers are made of? | Collagen |
| PDL fibers support the tooth connecting the dental alveolar bone to | the cementum |
| What permanent tooth does that primary first mandibular molar look like? | None |
| What permanent tooth does the primary second maxillary molar resemble? | Premolar |
| The two most morphologically variant teeth | 3rd molars, then Maxillary lateral incisors |
| Maxillary 3rd molars most often resemble what? and Why | A heart, because of the missing DL cusp |
| Mandibular centrals are distinguished by the cervical curvature which is | greater on the mesial than the distal |
| What tooth has a mesial marginal ridge that is lower on the mesial than on the distal? | Mandibular first premolar |
| Most common supernumerary teeth in the maxilla are | Between the central incisors or as 4th molars |
| Primate space in the Maxillary primary dentition is where | Canine to lateral incisor |
| Primate space in the mandibular primary dentition is where | Canine to 1st Premolar |
| The main component of enamel is | Inorganic matter (Hydroxyapotite) |
| The direction of the primary enamel rods in the cervical third is in an | Occlusal direction |
| The direction of enamel rods in the permanent teeth at the cervical third is in a | Gingival direction |
| The lower compartment of the TMJ is located | between the condyle and the disc |
| The Primary teeth are _______ than the permanent teeth and are consequently | Less mineralized,subject to more worn |
| The usual overjet is | 2-4 mm |
| The difference in space from the primary to the permanent dentition is | 2-4 mm |
| What teeth have distal and mesial marginal ridges | All teeth have distal and mesial marginal ridges |
| The lingual cusp of the mandibular 1st premolar typically contacts what in normal occlusion? | Nothing |
| Physiological rest position occurs when the muscles of mastication are in | Tonic Equilibrium |
| When the mandible moves from CO to EE, how do the condyles move | Down and forward |
| What anterior tooth has the greatest M-D crown deminsion | The maxillary central incisor |
| what tooth has nearly identical measurements for Inciso-cervical vs mesiodistal | The Maxillary Central incisor |
| What tooth has the greatest cervical curvature (Mesial) than any other tooth | The Maxillary Central Incisor |
| What maxillary tooth has the smallest mesio-distal crown width | The maxillary lateral incisor |
| Most variations in crown shape? | Maxillary lateral incisor |
| Anterior tooth that has most identical measurements of mesio-distal and facio-lingual | Maxillary lateral incisor |
| The incisor with the most cervical distal contact | Maxillary lateral incisor |
| Tooth that has a distal contact centered between the insio-cercial and the facio-lingual | Maxillary lateral incisor |
| Smallest crown dimensions of any tooth | Mandibular central incisor |
| Most symmetrical crown | Mandibular central incisor |
| Sharpest set of incisal angel | Mandibular central incisor |
| Proximal contacts are at the same level | Mandibular central incisor |
| Crown twisted on root | Mandibular lateral incisor |
| Longest overall tooth | Maxillary canine |
| Does the maxillary canine have a distal bulge | yes |
| Anterior tooth with the greatest F-L crown dimension | Maxillary Canine |
| Maxillary cusp tip is located ____ to the long axis | Facial |
| What anterior tooth has the greatest cervical prominance | The maxillary canine |
| Maxillary canine's distal contact is | centered |
| Has the longest CROWN dimension of any tooth | Mandibular canine |
| Has the straightest mesial alignment of crown to root | Mandibular canine |
| Makes a C shape from crown to root tip | Mandibular canine |
| Mandibular canine has an incisal edge that is _______ to the long axis | Lingual |
| Longest Mandibular tooth root | Mandibular canine |
| Only premolar with a longer mesial ridge | Maxillary 1st premolar |
| Only tooth with a mesial marginal groove, mesial crown concavity, and mesial root depression | Maxillary 1st premolar |
| Symmetrical Posterior tooth is | Maxillary 2nd premolar |
| Nearly equal cusp heights on one premolar | Maxillary 2nd premolar |
| Premolar with closest in size fossa | maxillary 2nd premolar |
| Smallest mesio-facially of any posterior tooth | Mandibular 1st premolar |
| Mandibular tooth that is closest to equal M-D and F-L | Mandibular 1st premolar |
| Most variation of posterior teeth in cusp heights | Mandibular 1st premolar |
| Only tooth with a mesio-lingual groove | Mandibular 1st premolar |
| The only premolar with multiple lingual cusps | Mandibular 2nd premolar |
| Only premolar with a lingual groove | Mandibular 2nd premolar |
| Only Premolar with a central fossa | Mandibular 2nd premolar |
| Maxillary posterior tooth that is closest in size M-D and F-L | Maxillary 1st molar |
| Largest M-D tooth | Mandibular 1st molar |
| Largest F-L of any mandibular tooth | Mandibular 1st molar |
| Largest o-c of any mandibular molar | Mandibular 1st molar |
| Three facial cusps | Mandibular 1st molar |
| Molar with the longest root | Mandibular 1st molar |
| Greatest root separation of any tooth | Mandibular 1st molar |
| Mesial Root has greatest F-L dimension of any other root | Mandibular 1st molar |
| Cruxiform occlusal pattern | Mandibular 2nd molar |
| Greatest distal root inclination | mandibular 3rd molar |
| Shortest root of any manidibular toth | Mandibular 3rd molar |
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