Purpose: Decreasing bone loss around implants is an important factor for implant durability. Pathological forces, such as bruxism, may result in bone loss and eventual implant failure. The aim of this study was to investigate the effect of botulinum toxin injection on biting forces, and its ultimate effect on peri-implant bone changes at different time intervals.
Materials and methods:A randomized clinical trial including 20 females (45-60 years old). All patients received an implant-supported partial denture. Patients were divided into 2 groups: 1. control group (CTR) (no injection), and 2. Botox group (BTX) (injected with botulinium toxin in their masseter muscle). T-scan was used for occlusal analysis (biting force), and was carried out at denture insertion after 2 weeks, 3 months and 6 months of insertion. CBCT was used to detect peri-implant bone changes, and was performed at insertion, 3 months, 6 months and 1 year after insertion. Results were analyzed via two-way (ANOVA) to compare between groups at different time periods, followed by Bonferroni's test post-hoc analysis.
Results:T-scan analysis and CBCT imaging showed that the biting force mean values and the mean crestal bone level changes in the BTX group were significantly lower than that of the control group.Conclusions: Botox injection in the masseter muscle bilaterally for bruxer patients with edentulous areas would offer them a viable chance for implants as a treatment option.
Purpose: To evaluate the effect of osseointegrated implants versus mucosal inserts used for retention of complete dentures. Materials and Methods: Twelve completely edentulous patients were selected for this study and divided into two groups of six. Group I received implant retained maxillary overdentures, while group II received maxillary overdentures retained by muchor zirconium mucosal inserts. Bone changes in both groups were evaluated using cone beam ct at insertion and after six and twelve months. Results: The results showed that the bone changes produced in mucosal overdenture wearers were greater than those produced in implant overdenture wearers. Conclusion: Zirconium mucosal inserts caused more bone changes than osseointegrated implants.
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