IADR Abstract Archives
Masticatoty Function of Single Implant Overdentures: 1-Year Results
Objectives: The aim of this study was to investigate whether masticatory function of single implant overdentures (IODs) would be superior to complete dentures (CDs), and whether the status achieved would remain consistent over the course of one year.
Methods: New CDs were fabricated for 22 subjects participating in this study. One implant was inserted in the middle of the symphyseal region of each subject. After implant operation, the participants were randomly allocated into 2 groups: Group IC experienced IOD period, and group CI underwent CD period for the first 2 months and vice versa for the next 2 months. Subsequently, participants chose their preferred prosthesis and used that thereafter. Mixing ability (MA) with color changeable chewing gum and maximum bite force (MBF) were measured to evaluate masticatory function. The assessments were performed at baseline (the old CD), the end of CD period (the new CD), the end of IOD period (the IOD), and one year after implantation. The statistical analysis was performed using the Friedman and Wilcoxon signed-rank test (α=0.05).
Results: One subject in group IC dropped out in the 3-month healing period because of a premature implant failure, resulting in 21 subjects. All of them chose IODs at the end of two periods, and were available for one-year evaluation. Both the new CD and the IOD improved the MA significantly (p<0.05); however, the MA of the IOD was significantly better than that of the new CD (p<0.01). IOD also showed significantly superior in MBF to both old and new CD (p<0.001), with no substantial differences between two these CDs (p>0.05). The improved masticatory function of IOD did not change over one year.
Conclusions: Masticatory function increased significantly with IODs compared to CDs, and remained unaltered after one year. Single-implant treatment would be a feasible modality for edentulous patients.
Methods: New CDs were fabricated for 22 subjects participating in this study. One implant was inserted in the middle of the symphyseal region of each subject. After implant operation, the participants were randomly allocated into 2 groups: Group IC experienced IOD period, and group CI underwent CD period for the first 2 months and vice versa for the next 2 months. Subsequently, participants chose their preferred prosthesis and used that thereafter. Mixing ability (MA) with color changeable chewing gum and maximum bite force (MBF) were measured to evaluate masticatory function. The assessments were performed at baseline (the old CD), the end of CD period (the new CD), the end of IOD period (the IOD), and one year after implantation. The statistical analysis was performed using the Friedman and Wilcoxon signed-rank test (α=0.05).
Results: One subject in group IC dropped out in the 3-month healing period because of a premature implant failure, resulting in 21 subjects. All of them chose IODs at the end of two periods, and were available for one-year evaluation. Both the new CD and the IOD improved the MA significantly (p<0.05); however, the MA of the IOD was significantly better than that of the new CD (p<0.01). IOD also showed significantly superior in MBF to both old and new CD (p<0.001), with no substantial differences between two these CDs (p>0.05). The improved masticatory function of IOD did not change over one year.
Conclusions: Masticatory function increased significantly with IODs compared to CDs, and remained unaltered after one year. Single-implant treatment would be a feasible modality for edentulous patients.