To avoid pocket formation distance between the finish line and alveolar crest should be:: (A) 0.5 mm, (B) 1 mm, (C) 1.5 mm, (D) 2.5 mm
Answer is D. If the distance between finish line and the alveolar crest is less than 2mm, the restoration may lead to gingival. inflammation, loss of alveolar crest and pocket formation.