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Comparison of Complications Between Splinted and Nonsplinted Implants Placed in the Posterior Region
Purpose:
To analyze and compare the long-term prognosis of splinted and nonsplinted types of implant-supported prostheses in the molar region of human patients.
Materials And Methods:
We analyzed 242 implants (121 sites) placed in the first and second molar regions of 102 patients. Implants were divided into splinted and nonsplinted groups. For each group, sex, age, implant position, bone grafting, functional loading periods (FLPs), clinical crown/implant (C/I) ratio, crown height space (CHS), horizontal distance between implants, prosthesis type, and occurrence of complications were investigated.
Results:
Mechanical complications were observed at 9 sites in the splinted group and 2 sites in the nonsplinted group. Biologic complications occurred at 16 sites in the splinted group and 5 sites in the nonsplinted group. In the splinted group, a statistically significant relationship was found between biologic complications and longer FLP, a smaller clinical C/I ratio, and less CHS. In the nonsplinted group, mechanical complications were statistically significantly associated with lower CHS. The cumulative risk of biologic complications increased dramatically from 90.33 months of FLPs in the splinted group.
Conclusions:
Lower CHS and mechanical complications were the most important causes of biologic complications for splinted implants and nonsplinted implants, respectively. An FLP of 90.33 months could be used as a reference time point for follow-up visits to identify and prevent biologic complications in splinted implants.
