Tooth Traits of the Permanent Dentition

Appendix B Tooth Traits of the Permanent Dentition

Appendix B includes tables listing important traits and characteristics of the teeth in the permanent dentition. The tables can be used in conjunction with the illustrations in Appendix A to note differences and similarities in tooth morphology. Tooth notation systems, dimensions, position of proximal contacts, heights of contour, curvature of the cementoenamel junction, and features of various profile, incisal, and occlusal views are summarized to facilitate the study of dental anatomy.

Table 1 Maxillary Incisors: Type Traits and Other Characteristics

  Central Incisor Lateral Incisor
Facial/Labial Aspect Fig. 6-9 Fig. 6-19
Proximal contacts Cervico-incisal location
Mesial Incisal third Junction incisal/middle thirds
Distal Junction incisal/middle thirds Middle third
Mesioincisal angle Sharp right angle Slightly rounded
Distoincisal angle Slightly rounded Distinctly rounded
Mesial profile Straight Slightly rounded
Distal profile Nearly round Distinctly rounded
Mesiodistal width Comparatively wide Comparatively narrow
Pulp horn(s) 3 (facial view) Usually 2 (facial view)
Lobes 4 (Fig. 4-12, A) 4
Lingual Aspect Fig. 6-3 Fig. 6-14
Marginal ridges Moderate More prominent
Cingulum Moderately pronounced More prominent
Fossa Moderately deep Deep
Incisal Aspect Fig. 6-11 Fig. 6-18
Outline Triangular Ovoid
Labial Slightly convex More convex
Dimensions Table 6-1 Table 6-2
Crown length (cervico-incisal) 10.5 mm 9 mm
Crown diameter    
Mesiodistal 8.5 mm 6.5 mm
Cervical 7.0 mm 5.0 mm
Labiolingual 7.0 mm 6.0 mm
Contour height 0.5 mm; Fig. 6-4Fig. 6-5 0.5 mm; Fig. 6-13
Facial/lingual Both cervical third Both cervical third
Curvature at CEJ Table 6-1 Table 6-2
Mesial 3.5 mm 3.0 mm
Distal 2.5 mm 2.0 mm
Root Fig. 6-3Fig. 6-5Fig. 6-9Fig. 6-10 Figs. 6-13Fig. 6-19Fig. 6-20
Length 13.0 mm 13.0 mm
Pulp canal(s) 1 Less frequent apical accessory canals
Chronology Table 2-3Table 6-1 Table 2-3Table 6-2
Eruption 7–8 yr 8–9 yr
Root completed 10 yr 11 yr
Tooth Notations Chapter 1 Chapter 1
Universal Right: 8; left: 9 Right: 7; left: 10
International (FDI) Right: 11; left: 21 Right: 12; left: 22
Palmer Right/left: image image Right/left: image image

Table 2 Mandibular Incisors: Type Traits and Other Characteristics

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  Central Incisor Lateral Incisor
Facial/Labial Aspect Fig. 7-2Fig. 7-9 Fig. 7-13Fig. 7-19
Symmetry Symmetrical bilaterally Asymmetrical
Proximal contacts Fig. 5-8, A Fig. 5-8, B
Mesial Incisal third Incisal third
Distal Incisal third Incisal third
Mesioincisal angles Sharp right angles Some rounding
Distoincisal angles Sharp right angles More rounded than mesioincisal angle
Curvature at CEJ Fig. 5-27, Table 7-1 Table 7-2
Mesial 3.0 mm 3.0 mm
Distal 2.0 mm 2.0 mm
Incisal Aspect Fig. 7-11 Fig. 7-18
Incisal edge (ridge) Right angle to line bisecting cingulum Distolingual twist to line bisecting cingulum
Pulp horn(s) 1 or 0 Variable; more prominent
Lobes 4 4
Dimensions Table 7-1 Table 7-2
Crown length (cervico-incisal) 9.0 mm 9.5 mm
Crown diameter    
Mesiodistal 5 mm 5.5 mm
Cervical 3.5 mm 4.0 mm
Labiolingual 6.0 mm 6.5 mm
Contour height Less than 0.5 mm; Fig. 7-7 Less than 0.5 mm
Facial/lingual Both cervical third Both cervical third
Dimensions Table 7-1

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Jan 9, 2015 | Posted by in Occlusion | Comments Off on Tooth Traits of the Permanent Dentition

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