Journal of implantology and applied sciences ISSN:2765-7833(Print) 2765-7841(Online) 대한구강악안면임플란트학회지

This is to review the procedures and prognosis of the single-stage posterior maxillary segmental osteotomies to regain the interarch spaces for dental implants in the posterior mandible. Seven patients who presented with alveolar extrusion of upper posterior molars underwent segmental osteotomies by single-stage Kufner’s buccal approach under the intravenous sedation and local anesthesia. The extruded dento-alveolar segments were repositioned upward and stabilized with osteosynthesis microplates & screws. Dental implants which were installated simultaneously have been examined periodically by the regained spaces, tooth vitality, periodontal healing, relapse, tenderness on function, and complications including maxillary sinus involvements. The procedures were completed within 80 minutes to regain the interarch spaces ranging from 2.5 to 5.5mm. The repositioned segments were maintained showing neither evidence of periodontal break-down nor tenderness to function, but only one patient whose segment had not been immobilized by osteosynthesis plate resulted in down-ward relapse by 2 mm in post-operative 18 months. A case followed by postoperative nasal bleeding resulted delayed healing of periodontium leaving chronic maxillary sinusitis later. The extruded dento-alveolar segments of the posterior maxilla were repositioned properly by Kufner’s one-stage segmental osteotomies. One microplate can be of help to keep the position until the osseous healing enough to support the masticatory force.