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Dental Anatomy U 3
Dental Anatomy Unit 3, Permanent Max/Man Central/laterals
| Question | Answer |
|---|---|
| what are the incisors closest to the midline? | maxillary/mandibular centrals |
| what are the incisors distal to the central incisor? | Maxillary/mandibular laterals |
| which crowns are usually the largest? (centrals/laterals?) | central incisor crowns are usually larger than lateral incisors |
| incisors of what arch resemble each other more closely? | same arch resemble each other more closely than those of the opposing arch |
| what crowns are usually larger? (maxillary incisor crowns/ mandibular incisor crowns) | maxillary incisor crowns are usually larger than mandibular especially mesiodistally |
| what is the except to maxillary incisor crowns being larger than mandibular incisor? | mandibular arch, lateral incisor crown and root are generally larger than those of the central incisors |
| in what arch are the lateral incisor crowns and roots generally larger than those of the central incisors? | mandibular |
| what are the functions of permanent incisors? | mastication, esthetics, phonetics |
| what do the permanent incisors do for mastication? | biting, cutting, incising and shearing |
| what do the permanent incisors do for esthetics? | size, shape, color and manner of placement all contribute to person's appearance also provide necessary support for normal profile of lips and face |
| what do the permanent incisors do for phonetics? | necessary for execution of certain sounds |
| what distinguishes incisors on their incisal edge? | flattened edge, no cusps |
| what distinguishable feature is on incisal edges? | mamelons or rounded projections on incisal edge |
| what distinguishes incisors on their positioning and angulation of marginal ridges? | mesial and distal located lingually parallel to long axis of the tooth |
| what distinguishes incisors on their lingual fossa and cingulum? | exhibit a large concavity which covers the incisal half og lingual surface where lingual fossa are found |
| which aspect do the permanent maxillary incisors have larger crowns than mandibular incisors especially? | mediodistally |
| which have larger crowns, permanent maxillary central incisors or permanent mandibular incisors | permanent maxillary incisors |
| what is the tooth number for the permanent maxillary central incisor on the right side of the mouth | 8 |
| what is the tooth number for the permanent maxillary central incisor on the left side of the mouth | 9 |
| which tooth is located at number 8 in the mouth | permanent maxillary incisor on right side |
| which tooth is located at number 9 in the mouth | permanent maxillary incisor on left side |
| in general, the crown of the permanent maxillary central incisors is longer _____ on the _____ rather than the ____ | in general, the crown of the permanent maxillary incisors is longer incisocervically on the medial than the distal |
| which side of the crown on the permanent maxillary central incisor is longer? mesial or distal? | mesial is longer than distal |
| from the labial or lingual aspect, what are permanent maxillary central incisors shaped like? | trapezoid |
| from the proximal perspective (mesial/distal) they are shaped like | triangle |
| what is the special consideration for permanent maxillary central incisors? | widest mesiodistally of any tooth largest incisors of both arches |
| when do permanent maxillary central incisors erupt? | 7-8 years |
| the permanent maxillary central incisor crown viewed from the labial aspect is more ____ than it is ___ | longer than it is wide |
| when does the permanent maxillary central incisor complete root formation? | 10 years |
| what does the labial surface of permanent maxillary central incisor look like? | convex greates at cervical 1/3 and reaches flatness towards the incisal edge |
| what does the mesial outline of the permanent maxillary central incisor look like from the labial surface? | convex but can be nearly straight the height of contour is the greatest at the incisal 1/3 near the mesioincisal angle |
| what is rather sharp in the mesial outline of the permanent maxillary central incisor viewed from the labial surface? | mesioincisal angle is rather sharp |
| what does the distal outline viewed from the labial surface look like on permanent maxillary central incisors? | also convex, but more rounded than mesial crest of curvature located in incisal 1/3 but farther cervically than medial outline |
| where does the CEJ curve towards when viewing the permanent maxillary central incisors from the labial aspect | curves evenly towards the root (labially) |
| when viewing the permanent maxillary central incisor from the labial aspect, where is the crown more narrow? | crown is narrower at the cervical region than at the incisal region |
| how is the lingual surface of the permanent maxillary central incisors shaped? | lingual is concave (fossa 2/3 to 1/2) then convex (cingulum) |
| what are the boundaries for the lingual fossa for permanent maxillary central incisors? | mesial marginal ridge, distal marginal ridge, incisal edge, and cingulum may have ridges that make a "W" |
| linguogingingival groove and lingual put may be found in... | lingual surface of permanent maxillary central incisors but more common in maxillary laterals |
| what is narrower in the lingual aspect of the maxillary central incisors? | lingual aspect is narrower mesiodistally than labial |
| mesial and distal margins converge more towards where for the lingual view of the permanent maxillary central incisors | converge more towards the gingiva |
| what does the cervical outline look like from the lingual surface of the permanent maxillary central incisors? | cervical outline has slightly greater depth of curvature and is assymetrical area of maximum curvature offset to the distal |
| where is the lingual crest of curvature located in the lingual view of the permanent maxillary central incisors? | cervical 1/3 greatest convexity at cingulum |
| where is the permanent maxillary central incisor convex when you look at it from the mesial aspect? | incisocervically and linguolabilly |
| the labial out like and the lingual outline have a crest of curvature in the what for the permanent maxillary central incisors viewed from the medial aspect? | labial is convex and lingual is convex and concave and both crests of curvature are in the cervical third |
| cervical margin is located where in the mesial aspect of the permanent maxillary central incisors | CEJ curves towards the incisal (evenly) |
| where is the greatest depth of curvature of CEJ of any tooth surface in the mouth? | mesial aspect of the permanent maxillary central incisors |
| what is an incisal ridge? | rounded and found on newly erupted teeth |
| what is an incisal edge? | pointed and worn down |
| where is the contact area located in the mesial aspect of the permanent maxillary central incisors located? | incisal 1/3 centered labiolingually |
| what is found in the distal aspect of the permanent maxillary central incisors? | smaller and shorter than mesial more convex CEJ is not as curved incisally contact area is smaller but still in incisal third |
| why is the contact area smaller on the distal aspect of the permanent maxillary central incisors? | because it contacts the lateral incisor which is a smaller tooth |
| what does the incisal aspect of permanent maxillary central incisors shaped like? | triangle incisal edge is straight mesiodistally centered over the root |
| where is the tooth narrower on the incisal aspect of permanent maxillary central incisors? | narrower on the mesiodistal of the lingual than on the labial lingual is narrower than the labial |
| which are the more distinct line angles on the incisal aspect of permanent maxillary central incisors? | labial line angles are more distinct than lingual line angles |
| which outline is more convex on the incisal aspect of the maxillary centrals? | lingual outline is more convex than the labial |
| what does the root look like on the permanent maxillary central incisors? | single, conical, straight and tapers to a rounded apex |
| what does the cross section look like for the permanent maxillary central incisors? | rounded triangular outline (narrow lingually) |
| what is the special consideration for the permanent maxillary central incisors when it comes to root length | root length is 1 1/2 times the length of the crown |
| what is dwarfed root and where can it be found? | short root which may endanger the tooth's longevity maxillary central incisors |
| what is hutchinson's incisor and where can it be found? | congenital syphilis causes it screwdriver shaped crown when viewed from the labial aspect maxillary central incisors |
| talon cusp is what and where can it be found? | large accessory cusp on the lingual surface looks like a phillip's head screwdriver maxillary central incisors |
| supernumerary teeth are what and where can the be found | mesiodens or extra teeth maxillary central incisors |
| what is tooth number 7 | permanent lateral maxillary incisor right |
| what is tooth number 10 | permanent lateral maxillary incisor left |
| what is the tooth number for the permanent lateral maxillary incisor on the right side of the mouth | 7 |
| what is the tooth number for the permanent lateral maxillary incisor on the left side of the mouth | 10 |
| lateral maxillary incisors generally share contacts with... | mesial contacts with central incisors distal contact with canine |
| what do lateral maxillary incisors look like compared with central incisors generally? | smaller in all measurements to the central incisors except in root length which is the same |
| which tooth display greater variation in form than any other permanent tooth? | upper laterals or permanent lateral maxillary incisors |
| what is the eruption schedule for permanent lateral maxillary incisors? | 8 to 9 years |
| when is the root complete on lateral maxillary incisors? | 11 years |
| what does the mesial outline of the labial surface of lateral maxillary incisors look like | more convex than in central incisors with more rounded angles |
| where is the crest of curvature located in the mesial outline of the labial surface of lateral maxillary incisors? | located farther gingivally in the incisal 1/3 near the junction with the middle 3rd |
| what does the distal outline of the labial surface of the lateral maxillary incisors look like | always more rounded than that of central with more cervially placed crest of curvature |
| which side is more rounded on the maxillary lateral incisors on the labial aspect | distalincisal angle is more rounded than the mesioincisal angle |
| how many mamelons is usually round in the lateral maxillary central incisors? | 2 mamelons |
| how does the insical edge look on the labial surface of the lateral maxillary incisors? | not as straight as centrals, exhibits greatest rounding of any incisor |
| what tooth exhibits the greatest rounded of any incisor? | maxillary lateral incisors |
| what does the cervical outline look like from the labial surface of the maxillary lateral incisors | labial surface is more convex both mesiodistally and incisogingivally than centrals |
| what does the mesial margin look like from the lingual aspect of the lateral maxillary incisors? | same like centrals |
| what does the distal margin look like from the lingual aspect of the lateral maxillary incisors? | distoincisal angle is more rounded |
| what is the cervical outline look like for the lingual aspect of the lateral maxillary incisors? | CEJ curves apical but is offset distally |
| what is more prominent in the lingual aspect of the lateral maxillary incisors than the central incisors? | mesial and distal marginal ridges are more prominent and the lingual fossa is deeper than in centrals |
| where are the linguogingival groove and lingual put most likely to occur? | lingual aspect of the lateral maxillary incisors |
| what is the linguogingival fissure? | extends distally onto the cingulum from the lingual pit in a slightly horozontal direction and can be found on the lingual aspect of the lateral maxilalry incisors |
| where is the height of contour in the lingual aspect of the lateral maxillary incisors? | cervical 1/3 where the greatest curvature of the cingulum is |
| where is the contact area located in the mesial aspect of the lateral maxillary incisors? | contact area incisal 1/3 near junction |
| what does the cervical 1/3 look like in the mesial aspect of the lateral maxillary incisors? | exhibits less depth of curvature than mesial of centrals |
| what does the mesial aspect look like overall when compared to the centrals on lateral maxillary incisors | similar but with lessoned dimensions |
| what does the distal aspect of the maxillary lateral incisors look like | smaller and more convex in all dimension than the mesial |
| where is the contact area in the distal aspect of the maxillary lateral incisors look like? | contact area shorter and not as incisally placed than mesial |
| what does the cervical line look like for the distal aspect of the lateral maxillary incisors | cervical line shows less curvature than mesial |
| what does the incisal aspect of the lateral maxillary incisors look like? | rhomboidal shaped cingulum more prominent but overall tooth is smaller |
| when looking at the incisal aspect of the lateral maxillary incisors, what has more convexity than centrals? | labially and lingually have more convexity than centrals |
| what does the root look like for lateral maxillary incisors? | single root, wider labiolingually than mesiodistally root of laterals is longer than crowns of centrals roots are the same length as the laterals |
| what does the apex look like on root surfaces of lateral maxillary teeth | apex is sharper, apical 1/3 may be deflected towards the distal |
| what does the root look like in cross section for the lateral maxillary teeth? | ovoid in cross section |
| what is a tubercle and where can you find it? | projection on the cingulum lateral maxillary incisors |
| what is a linguogingival fissure and where can you find it? | fissure from lingual pit onto distal of cingulum lateral maxillary incisors |
| what is a peg lateral and where can you find it? | fiminutive peg shaped crown form lack of development in mesial and distal portions lateral maxillary incisors |
| what is agenesis and where can you find it | congenitally missing teeth lateral maxillary incisors |
| what is dens in dente and where can you find it | tooth within a tooth lingual pit entrance site where enamel and dentin invaginate tooth's pulp cavity maxillary lateral incisors |
| distorted crowns and unusual root curvatures are mostly seen on... | maxillary later incisors |
| what are the simplest and least variable teeth in the mouth? | mandibular incisors |
| what are the smallest permanent teeth | mandibular incisors |
| what is the special characteristics of mandibular incisors | central is slightly smaller than the lateral centrals and laters more closely resemble each other than maxillary incisors |
| what is the general shape of mandibular incisors when compared to maxillary incisors? | longer incisocervically and narrower mesiodistally |
| what has the smallest crown size of any permanent tooth? | central mandibular incisors |
| when does the central mandibular incisor erupt? | 6-7 yers |
| when is the completion of root in the central mandibular incisor | 9 years |
| from the lingual aspect, the mesial outline of the central mandibular incisor generally looks like | tapers evenly towards gingiva in a nearly straight line mesioincisal angle is sharp |
| where is the height of contour in the mesial outline from the labial aspect of the mandibular central incisor? | incisal 1/3 close to the incisal margin |
| distal outline of the labial aspect of the mandibular incisor looks like... | same as mesial |
| what does the incisal outline of the labial aspect of the mandibular incisor look like? | 3 mamelons if present after wear will have incisal edge that is straight at right angle with long axis of the tooth |
| what does the cervical outline look like from the labial aspect of the mandibular central incisor | symmetrically curved towards the root very slightly convex mediodistally and labiolingually |
| what type of shape does the labial aspect have for mandibular central incisors? | trapezoid |
| the CEJ is located where on the lingual aspect for permanent mandibular central incisors? | further from incisal when compared to labial surface |
| how does the lingual surface of the permanent mandibular central incisors generally look? | no grooves, pits or fissures, usually a smooth surface |
| from the mesial aspect of the permanent mandibular central incisors what does the labial outline do | labial margin slopes in a straight to slightly convex line from incisal ridge to crest of curvature rest is convex in remaining 1/3 of cervical area |
| what does the lingual outline look like for the mandibular central incisors | convex in incisal 2/3 and concave |
Created by:
Chobchi
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