Osteogenic activity of the mixture of chitosan and particulate dentin.

To evaluate the healing effect of a mixture of chitosan and particulate dentin, a 8-mm-diameter critical size defect was created in the calvarium of 75 rats. The rats were divided into four experimental groups and a control group (no treatment). The defects in the experimental groups were grafted either with pig particulate dentin (group 1), a mixture of particulate dentin and plaster of Paris (group 2), particulate dentin and chitosan (group 3), or chitosan only (group 4).

Incidence of complications and problems related to orthognathic surgery.

Purpose: This retrospective report evaluates the incidence of intra- and postoperative complications of orthognathic surgery and their relevance.

Patients And Methods: The clinical records and radiographs of 301 patients who underwent surgery at Chosun University Dental Hospital, Korea, over an 8-year period between 1998 and 2005 were examined.

Results: The most common complication was a neurosensory deficit in the region innervated by the inferior alveolar nerve.

Expression of amino acid transporter LAT1 and 4F2hc in the healing process after the implantation of a tooth ash and plaster of Paris mixture.

Background: In order to elucidate the expression pattern of L-type amino acid transporter 1 (LAT1) in the bone formation process, the expressions of LAT1 and its subunit 4F2 heavy chain (4F2hc) were investigated in the healing process after the implantation of a tooth ash-plaster of Paris mixture in rats with calvarial osseous defect.

Materials And Methods: Circular calvarial defects (8 mm in diameter) were made midparietally. The rats were divided into 2 groups, 1 control group and 1 experimental group.