black's classification of carious lesions

Question 1

class I restoration

Answer 1

• affects the pit and fissures of the teeth (anterior and posterior)
• surfaces involved are:
• occlusal pits and fissures of premolars and molars
• buccal pits and fissures of mandibular molars
• lingual pits and fissures of the maxillary molars
• lingual pits of maxillary incisors, most frequently in the pit near the cingulum

Question 2

class II restoration

Answer 2

• posterior teeth only
• must include an IP area, ie. DO, MOD, MODL, etc
• class II lesion is the extension of the class I lesion into the proximal surfaces of premolars and molars
• surfaces involved
• two surface restoration of posterior teeth
• three surface restoration of posterior teeth
• four or more surface restoration of posterior teeth

Question 3

class III and IV restorations

Answer 3

class III lesion
- affects the IP surface of incisors and canines (anterior only, mesial or distal)
class IV lesion
- involves a larger surface area, which includes the incisal edge and IP surface of incisors and canines

Question 4

class V restorations

Answer 4

• classified as a smooth surface restoration
• these decayed lesions occur at:
• gingival third of the facial or lingual surfaces of any tooth
• root of a tooth near the CEJ
• both anterior and posterior teeth at the cervical third

Question 5

class VI restorations

Answer 5

• both the anterior and posterior teeth, either on an incisal edge or on cusp tips only