COMPARISON OF SECTIONAL MATRIX VERSUES CIRCUMFERENTIAL MATRIX FOR RECONSTRUCTION OF PROXIMAL CONTACT IN CLASS 2 RESTORATIONS

Class II caries affects proximal surfaces of premolars and maintain their anatomical proximal contact of tooth, is important to avoid food impaction in the interdental area for protection of periodontium and occurrence of secondary carious lesion.Different types of Matrix band system are used to restore tooth cavities with missing proximal walls, including flat or pre-contoured bands, retainer-fixed circumferential systems, and sectional matrices, and either metal or plastic matrices which produces good contours and contacts for use with amalgam and can also be employed for insertion of composite resin.This study aimed at assessing the influence of different matricing techniques :either sectional matrix or circumferential matrix and the influence of operator experience on reproduction of optimum proximal contacts for posterior proximal resin composite restorations.

Inclusion Criteria:Tooth with compound class 2 cavities Patient with good general health. Patient with minimum age of 18 years. Fully erupted occluding premolar and molar teeth.Exclusion Criteria:Tooth complex class 2 cavities. Tooth with severe periodontal disease. Diastema between posterior teeth. Third molars are excluded.. Tooth mobility greater than 1 mm.