Comparative Evaluation of Internal Margin Adaptation and Integrity of Class I Preparations using Two Composites: An Study.

Aim And Objectives: The aim of this study is to evaluate the internal margin adaptation and integrity of Class 1 preparations using two composites types (bulk fill/conventional) with two placement methods (4/2 mm increments).

Materials And Methods: Class 1 preparations of 4 mm × 4 mm dimensions were made on 30 extracted human mandibular molars. They were randomly divided into three groups; among them, in Group 1 ( = 10), cavities were filled with SureFil SDR Bulk Fill, Group 2 ( = 10) cavities were filled with Filtek Bulk Fill of 4 mm increments in both groups, and in Group 3 ( = 10), cavities were filled with conventional composite Filtek Z350 with 2 mm increments.