Classification of Dental Caries Flashcards
Class I
- Caries confined to the occlusal pits and fissures on MOLARS and PREMOLARS
- Caries confined to the buccal and lingual pits of MOLARS
- Caries confined to the lingual pits of ANTERIOR TEETH
Class II
-Caries present on the proximal surfaces of POSTERIOR TEETH
Class III
Caries on the proximal surface of ANTERIOR teeth that do NOT include the incisal edge
Class IV
Caries on the proximal surface of ANTERIOR teeth that include the incisal edge
Class V
Caries on the facial and lingual gingival third of any tooth
Class IV
Caries on the cusp tips of any tooth
define cavosurface angle
angle of tooth structure formed at the margin of the cavity preparation wall and the unprepared tooth surface
Define cavosurface margin
line of cavity preparation where the external surface of the tooth meets the restoration margin
Etiology of class I caries
Clinically often observed in patients that have:
- deep pits/fissures
- poor OH
- frequent intake of sugar
- unfluoridated communities where access to care is limited
Etiology of class V caries
- gingival recession (exposed cementum)
- Erosion, abrasion, abfraction along the gingival third of teeth (exposed dentin)
- Xerostomia (due to medication, radiation, disease, etc)
- Presence of dental appliances
- Poor OH
- Frequent intake of sugar
- Unfluoridated communities with limited access to care
What can be used to detect whether a cass I caries lesion has penetrated into dentin?
BW
What is required of the teeth during a clinical assessment for class v caries?
clean dry teeth
T/F: it is ok to place cavosurface margin on occlusal contact
False! avoid placement of margins on occlusal contact due to risk of fracture
pulpal floor must be at least ___mm into dentin
0.25mm
Occasionally, class I occlusal preps must extend onto lingual/facial surfaces to include carious pit. What side would it be for Mx and Md molars?
Mx - lingual
Md - buccal
Location of transverse ridge in Md 1st premolar
extends from the triangular ridge of the buccal cusp to the triangular ridge of the lingual cusp and separates the mesial and distal fossae
If mesial and distal portions of Md 1st PM are carious, what can you do?
create a prep avoiding the transverse ridge
3 non-carious class v lesions
- abrasion
- Abfraction
- erosion
Early class v lesions appear ____, wehereas advanced class v lesions appear ____
Early class v lesions appear YELLOWISH, wehereas advanced class v lesions appear DARK BROWN/BLACK
Etiology of abrasion lesions
-frictional force between tooth and external forces
Etiology of abrfaction lesions
- occlusal flexural forces and parafunctional stresses
- occlusal loads cause teeth to flex at the neck
appearance of abrfaction lesions
sharp, wedge-shaped notch in the gingival portion
What material do you usually use for abrfaction lesions and why?
GI, because it displays chemical adhesion
etiology of erosion lesions
exogenous exposure: diet
endogenous exposure: GERD, bulimia
presentation of erosion lesions
smooth shiny lesions
Management of non carious lesions
- document and monitor
- identify etiology and eliminate if possible
- restore if symptomatic, become carious, or esthetic concerns
How to increase retention of class v preps
by placing undercuts on the occlusopulpal and gingivopulpal line angles with L and R margin trimmers