PRELOADED DENTAL DAM AND METHOD FOR GINGIVAL TISSUE RETRACTION

摘要

A method and device for the cordless retraction of the gingival sulcus tissue that includes a dam shaped to be fitted onto a tooth. The peripheral wall may be either pervious or impervious to light rays and opened at at least one end. The preloaded tooth dam is fitted to a prepared tooth so that when pressure is applied onto the tooth dam, the retraction material is displaced under pressure and forced into the sulcus, causing the gingival tissue to retract away from the tooth to enlarge the gingival sulcus. In one form of the invention, the structure of the dam enables the retraction material to mechanically bond or adhere to the internal surfaces of the dam, permitting the retraction material to be removed simultaneously with the dam to leave behind a clean enlarged sulcus. In another embodiment the cap is filled with an impregnated compressible porous material.