Histological and histomorphometric study using an ultrasonic crestal sinus grafting procedure. A multicenter case study.

BACKGROUND: The aim of this study was to evaluate the efficacy of a hydrodynamic ultrasonic driven transcrestal sinus grafting procedure (Intralift (R), Acteon Company, Bordeaux, France) and the use of a bovine high temperature sintered grafting material in sinus sites with less than 5 mm remaining bone height with no additional autogenous bone in order to create a sufficient recipient site for implants. MATERIAL AND METHODS: 12 patients (16 sinus) in this multicenter case study were included. Using a crestal approach, bone under the sinus was prepared with ultrasonic tips until the Schneiderian membrane was reached. With a trumpet shaped instrument, the Schneiderian membrane was elevated. In the new created subantral space a high temperature sintered bovine grafting material was introduced (Bego Oss, BEGO Implant Systems GmbH & Co. KG, Bremen, Germany). After 6 months biopsies were taken with a trephine bur and histologies were generated following histomorphometric analysis. RESULTS: The results showed new vital bone in average of 33.4% +/- 17.05%, and 43.6% +/- 16.70 of bone substitute material. No signs of abnormal inflammation were observed. CONCLUSIONS: This procedure (Intralift (R)) allows, using a bovine material with no additional autogenous bone, new bone formation in the sinus in order to allow place implant subantraly.