상악동 거상술 후 식립한 임플란트의 거상술 수술 방법과 기여 인자에 따른 임상적 예후에 대한 후향적 연구

Abstract

Purpose: The purpose of this study was to evaluate the correlation between implant survival rate and other related factors with respect to maxillary sinus augmentation by analysing installed implant’s prognosis retrospectively based on the commonly exercised maxillary sinus augmentation, primarily lateral approach and crestal approach.

Materials and methods: A total of 441 implants was installed to 182 patients after maxillary sinus augmentation were performed between January 2008 and December 2012 at the Chosun university Dental Hospital. While the patients’ age ranged from 21 to 90, with a mean of 57 (M 57, F 56.9), gender distribution showed 118 male (64.84%) and 64 female (35.16%). The total survival rate and the influence of the following factors on implant according to maxillary sinus augmentation technique were evaluated; patient characters(age, gender, general disease(controlled DM), sinus augmentation technique, implant surface, bone graft material, site of implant installation, sinus membrane perforation, closure method for osseous window, complication.

Results: The result of the study based on the research showed survival rate of 97.51% (lateral approach 98.03%, crestal approach 95.3%). In total, 430 implants were placed successfully, while 11 were failed. There were no significant correlation found in relation to the survival rate of the implant with sinus augmentation technique, patient characters (age, gender, general disease(controlled DM)), bone graft material, site of implant installation, sinus membrane perforation and complication but implant surface, closure method for osseous window clearly revealed considerable level of correlation. In case of lateral approach, Resorbable blasting media (RBM), Sandblasting large grit acid-etched (SLA) implant surface demonstrated higher implant survival rate compared to Hydroxyapatite (HA) coating, TiO2-blasting and Double acid etching implant surface. In relation to closure method for osseous window, uncovered bone window showed the highest survival rate followed by replaced by cortex bone window and using resorbable membrane respectively in the order given.

Conclusions: In conclusion, it is acceptable to say this study demonstrates the installed implants followed by maxillary sinus augmentation showed no statistically significant difference based on the sinus augmentation techniques. It is also worth mentioning that RBM and SLA showed higher survival rate over other implant surface. On the other hand, in case of closure method for osseous window, using resorbable membrane led to lower survival rate in comparison with either cases where noting was used to cover or window bone replace were used.

Key words: Maxillary sinus augmentation, Lateral approach, Crestal approach, Implant survival rate.