Classification of cavity cutting
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The document discusses various classification systems for cavity preparation in dentistry. It describes G.V. Black's original classification system of Classes I-V which categorize cavities based on their location. It also discusses modifications to Black's system proposed by Charbeneu, Sturdevant, Finn, and others. Finally, it introduces the Mount and Hume classification system which defines the extent and complexity of cavities based on the site of carious lesions and their size.
Classification of cavity cutting
- 1. Topic – Classification Of Cavity Cutting Submitted by- Sanjita Sharma Roll No. 61 (Batch- G) BDS – 3rd (2017-18) Guided by- Dr. Binti Rani Chand
- 3. Definition Cavity Preparation is designed to remove carious enamel and/or dentin and restore the anatomic form of the tooth with a durable and biocompatible material.
- 4. G.V. Black’s Classification Of Cavity Preparation
- 5. Class I Cavity For caries involving pits, fissures and defective grooves. Locations: Occlusal Surface of Molars and Premolars Occlusal 2/3rd of buccal and lingual surfaces of molars Lingual surfaces of anterior teeth.
- 6. Class II Cavity For caries lesions formed on the proximal surfaces of the bicuspids and molars.
- 7. Class III Cavity Carious lesions found on the proximal surface of anterior teeth that do not involve necessitate the removal of the incisal angle.
- 8. Class IV Cavity Carious lesions found on the proximal surfaces of anterior teeth that involves the incisal angle.
- 9. Class V Cavity Carious lesions found at the gingival 3rd of the facial and lingual surfaces of the anterior and posterior teeth.
- 10. Class VI Cavity (Simon’s Modification) Carious lesions involving cuspal tips and incisal edges of teeth.
- 11. Other Modifications I. Charbeneu’s Modification : Class II: Cavities on single proximal surfaces of bicuspids and molars. Class VI: Cavities both mesial and distal proximal surfaces of posterior teeth that will share a common occlusal isthmus. Lingual surfaces of upper anterior teeth. Any other unusually located pit or fissure involved with decay.
- 12. II. Sturdevant’s Classification Simple Cavity: Cavity involving only one tooth surface. Compound Cavity: Cavity involving two surfaces of a tooth. Complex Cavity: Cavity involving more than two surfaces of a tooth.
- 13. III. Finn’s Modification of Black’s Cavity Preparation for primary teeth Class I: Cavities involving pits and fissures of molar teeth and the buccal and lingual pits of all teeth Class II: Cavities involving proximal surfaces of molar teeth with access established from the occlusal surface. Class III: Cavities involving proximal surfaces of anterior teeth, which may or may not involve a labial or lingual extension. Class IV: Cavities of proximal surfaces of an anterior tooth, which involves the restoration of an incisal angle. Class V: Cavities present on the cervical 3rd of all teeth, including proximal surface where the margin of ridge is not included in the cavity preparation.
- 14. Baume’s Classification A) Pit And Fissure Cavities B) Smooth Surface Cavities
- 15. Mount And Hume Classification (1998) This new system defines the extent and complexity of a cavity and at the same time encourages a conservative approach to the preservation of tooth structure. This system is designed to utilize the healing capacity of enamel and dentin.
- 16. Three Sites of Carious Lesions Site 1: Pits, fissures and enamel defects of occlusal surfaces of posterior or other smooth surfaces. Site 2: Proximal enamel immediately below areas in contact with adjacent teeth. Site 3: The Cervical 1/3rd of the crown or, following gingival recession, the exposed root.
- 18. Four Sizes of Carious Lesions Size 1: Minimal involvement of dentin just beyond treatment by remineralization. Size 2: Moderate involvement of dentin. Following cavity preparation, remaining enamel is sound, well supported by dentin and not likely to fail under normal occlusal load. The remaining tooth structure is sufficiently strong to support the restoration.
- 19. Size 3: The cavity is enlarged beyond moderate. The remaining tooth structure is weakened to the extend that cusps or incisal edges are split, or are likely to fail or left exposed to occlusal or incisal load. The cavity needs to be further enlarged so that the restoration can be designed to provide support and protection to the remaining tooth structure. Size 4: Extensive caries with bulk loss of tooth structure has already occurred.