IADR Abstract Archives
Should the prosthesis of two implants in the molar region be splinted?
Objectives: Bio-mechanical complications are crucial factors that determine the prognosis of osseointegrated dental implants. The aim of this study is in the aspect of their complications to analyze and compare the long term prognosis of two different types such as splinted and non-splinted prosthesis of implant supported restoration on the first and second molar regions.
Methods: A total 242 implants of 121 sites installed on the first and second molar region in 102 patients. Implants were divided into splinted group (i.e., 82 sites including 164 implants) and non-splinted group (i.e., 39 sites including 78 implants). For each group, patient information about gender, age, implant position, bone grafting, functional loading periods (FLP), clinical crown/implant (C/I) ratio, crown height space (CHS), horizontal distance between implants, restoration type of each implant, and occurrence of biological [i.e., peri-implant mucositis (PM) and peri-implantitis (PI)] and mechanical [i.e., screw loosening (SL), screw fracture, crown fracture, and repeated SL] complications were investigated by clinical and radiographic record.
Results: In splinted group, biological and mechanical complications were observed on 16 and 9 sites, respectively. Also, in non-splinted group, they were observed on 7 and 2 sites, respectively. In splinted group, implants with only biological complications showed statistically significant relationship with lower clinical C/I ratio. Also, all implants of splinted group with biological complications had statistically significant relationship with longer FLP. In non-splinted group, implants with biological or mechanical complications showed statistically significant difference with lower clinical C/I ratio.
Conclusions: The clinical C/I ratio of both groups is most important factor in occurrence of biological complications. Because splinted prosthesis is structurally vulnerable to oral hygiene management, the longer FLP, the greater the risk of biological complications. In non-splinted group, mechanical complications can easily occur due to the lack of adequate CHS that directly accepts an occlusal force.
Methods: A total 242 implants of 121 sites installed on the first and second molar region in 102 patients. Implants were divided into splinted group (i.e., 82 sites including 164 implants) and non-splinted group (i.e., 39 sites including 78 implants). For each group, patient information about gender, age, implant position, bone grafting, functional loading periods (FLP), clinical crown/implant (C/I) ratio, crown height space (CHS), horizontal distance between implants, restoration type of each implant, and occurrence of biological [i.e., peri-implant mucositis (PM) and peri-implantitis (PI)] and mechanical [i.e., screw loosening (SL), screw fracture, crown fracture, and repeated SL] complications were investigated by clinical and radiographic record.
Results: In splinted group, biological and mechanical complications were observed on 16 and 9 sites, respectively. Also, in non-splinted group, they were observed on 7 and 2 sites, respectively. In splinted group, implants with only biological complications showed statistically significant relationship with lower clinical C/I ratio. Also, all implants of splinted group with biological complications had statistically significant relationship with longer FLP. In non-splinted group, implants with biological or mechanical complications showed statistically significant difference with lower clinical C/I ratio.
Conclusions: The clinical C/I ratio of both groups is most important factor in occurrence of biological complications. Because splinted prosthesis is structurally vulnerable to oral hygiene management, the longer FLP, the greater the risk of biological complications. In non-splinted group, mechanical complications can easily occur due to the lack of adequate CHS that directly accepts an occlusal force.