Experimental study on histopathological change of intentional retention of vital submerged tooth-roots covered by mucoperiosteal flap in dog.

Abstract

An experimental study was made in dog on the intentional retention of vital submerged tooth-roots covered by a mucoperiosteal flap, and their histopathological changes were examined 28 and 55 days after the operation. The results were as follows:

At the 28th days the amputated pulp was covered with newly formed dentin or dense fibrous connective tissue, and no remarkable pathological changes were noted in the amputated pulp tissue or its neighboring tissues. At the 55th days after the operation, the newly formed dentin, covering the amputated pulp, was thicker than that at 28 days, and all of the tooth-roots examined were retained in good condition. In a few cases, numerous bone trabeculae were formed above the cut root-surface.

The present results were more satisfactory than a previously reported method using the mucosal flap.