Retrospective clinical study on sinus bone graft and tapered-body implant placement.
OBJECTIVE
This study evaluated implant success rate, survival rate, marginal bone resorption of implants, and material resorption of sinus bone graft in cases wherein tapered body implants were installed.


METHODS
From September 2003 to January 2006, 20 patients from Seoul National University Bundong Hospital, with a mean age of 54.7 years, were considered. The mean follow-up period was 19 months. This study covered 50 implants; 14 implants were placed in the maxillary premolar area, and 36 in the maxillary molar area; 24 sinuses were included.


RESULTS
The success rate was 92%, and the survival rate was 96.0%. The mean amount of sinus augmentation was 12.35±3.27 mm. The bone graft resorption rate one year after surgery was 0.97±0.84 mm; that for the immediate implantation group was 0.91±0.86 mm, and that for the delayed implantation group was 1.16±0.77 mm. However, the difference was not statistically significant. The mean marginal bone resorption one year after restoration was 0.17±0.27 mm (immediate group: 0.12±0.23 mm; delayed group 0.40±0.33 mm); statistically significant difference was observed between the two groups.


CONCLUSIONS
Tapered body implant can be available in the maxillary posterior edentulous ridge which sinus bone graft is necessary.
Department of Oral and Maxillofacial Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
Jong-Hwa
JH
Kim
Department of Oral and Maxillofacial Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
Young-Kyun
YK
Kim
Department of Conservative Dentistry, Seoul National University Bundang Hospital, Seongnam, Korea.
Ji-Hyun
JH
Bae
Bone resorption; Sinus; Tapered implant