[Clinical evaluation of two-implant-supported single molar restoration].
OBJECTIVE
This study was to evaluate the clinical effect of two-implant-supported single molar restoration with wider interdental space.


METHODS
32 subjects who presented 38 single molar missing with wider interdental space were involved in this study. Two-implant-supported single molar restoration was performed with Branemark system or Replace system. The stability of the implant restoration, periodontal condition, and peri-implant bone absorption were investigated 3 months, 1 year and 3 years after restoration. The periodontal condition was analyzed by Wilcoxon signed rank test or Chi-square test and the peri-implant bone absorption was analyzed by paired t test using SPSS13.0 software package.


RESULTS
Among 76 implants, one implant was lost in 2 weeks after surgery, which had been re-implanted successfully 3 months later. After loading, the survival rate of 76 implants was 100% during the next three years with perfect osseointegration. No significant differences for the plaque index, bleeding on probing, probing depth were found 3 months, 1 year and 3 years after restoration (P>0.05). The bone absorption of peri-implant was (0.56+/-0.14)mm at 3-month and stable trends were shown at 1 year (0.15+/-0.05)mm and 3 years (0.17+/-0.06)mm, both of which were significantly lower than that at 3-month (P<0.05).


CONCLUSIONS
Two-implant-supported single restoration is suitable for single molar missing with wider interdental space.
Bi
Wei
W
Department of Stomatology, Zhongshan Hospital, Fudan University, Shanghai 200032, China. bixcd@sina.com
Yu
You-cheng
YC
Wang
Qing
Q
Gong
Yi-ming
YM
Sun
Jian
J
D016301:Alveolar Bone Loss; D003758:Dental Implantation, Endosseous; D003774:Dental Plaque Index; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D006801:Humans; D008963:Molar; D016348:Osseointegration; D010512:Periodontal Index