Root fracture during insertion of prefabricated posts related to root size

Abstract

T he consequence of inappropriate post selection and/ or hasty insertion can result in tooth fracture and/or loss.’ It has been demonstrated that conical or parallelsided post design has a direct effect on root fracture during post insertion. * However, during experimentation it became apparent that root size and its relationship to post size had a direct effect on root fracture. This article correlates root size, post size, and fracture rate during insertion of prefabricated posts. portion of each tooth was removed with a high-speed fissure bur at the level of the cementoenamel junction. The teeth were reamed with a No. 50 reamer to the apex, coated with a thin Silastic (Dow-Corning, Midland, Mich.) membrane to simulate the periodontal ligament, and embedded in a resin block that fit the testing apparatus (Fig. 2). Each root was measured five times before it was embedded. The resin, Silastic, and root test specimen were stored in water until tested.