A Study of Influence of Resudal Subantral Bone Height on Bone Gain in Lateral- approach One-stage Sinus-lift Technique without Bone Grafts

Abstract

Background and aim: Maxillary Sinus Augmentation is a common procedures that aims to overcome lack of  bone height in posterior maxilla. Recently many studies suggested that mere sinus membrane elevation by inserted dental implants without any grafting material is enough to get new bone formation under the elevated sinus membrane. This study aimed to investigate the relation between initial subantral bone height and bone gain after 6 months of surgical procedure around implants placed in lateral-approach one-stage sinus-lift technique without bone grafts depending on bone height values as measured on CBCT images.

Materials and Methods: The study sample contained 18 implants placed on 11 patients  of  both genders (5 male,6 female), with initial subantral bone ( 3,6 ــــ 8,1mm) average (6,98 mm), who underwent lateral-approach sinus-lift without bone grafts. Implants were inserted simultaneously and protruded 6 mm under the elevated sinus membrane. A radiographic follow-up was performed by CBCT imaging, immediately and after 6 months of surgical procedure. The subantral bone height on implants was measured at the two mentioned periods, and Person Test was used with p<0,05.    

Results: There was no linear relation between initial subantral bone height and bone gain after 6 monthes of surgical procedure with p <0,05.         

Conclusion: The initial subantral bone height has no effect on bone gain after 6 months of surgical procedure in the lateral- approach one-stage sinus-lift technique without bone grafts.              

Key words : Sinus lift without bone grafts – bone reformation – dental implants