Method to improve passive fit of frameworks on implant-supported prostheses: An in vitro study

Marginal and internal fit of CAD/CAM frameworks in multiple implant‐supported restorations: Scanning and milling error analysis

“…Therefore, it may be meaningful, using a CMM, to correct the scanning of frameworks with more than three implants, on cast models, before designing and milling the final piece. Manzella et al determined that errors superior to one degree are those more likely to yield clinical complications. Although we do not know the exact significant error value that will develop clinically relevant complications, we believe that future work should address this aspect.…”

“…A proper fit can minimize and prevent mechanical and biological implant‐related complications . Many researchers have argued that the consequences of lack of adequate fit could lead to both biologic and mechanical complications, such as peri‐implantitis and recurrent screw torque loosening and fractures …”

“…Additionally, the potential financial and quality of life impact on the patient may lead to significant emotional distress . An attempt for optimizing the quality of framework fit must be made in order to minimize complications.Many researchers have argued that the consequences of lack of adequate fit could lead to both biologic and mechanical complications, such as, mucositis, peri‐implantitis, screw loosening, and fractures . Although marginal misfit <150 μm has been considered clinically acceptable, no threshold has been scientifically proven to prevent failures/complications.…”

“…[3][4][5] Many researchers have argued that the consequences of lack of adequate fit could lead to both biologic and mechanical complications, such as peri-implantitis and recurrent screw torque loosening and fractures. [5][6][7][8][9] Prosthesis adaptation should be evaluated after examining the simultaneous contacts over the entire surface of the implant suprastructure. Therefore, its assessment requires evaluation of the marginal adaptation of the suprastructure, known as marginal discrepancy (MD), and the full inner contact surfaces, known as internal discrepancy (ID) 10,11 (Figure 1).…”

“…19 An attempt for optimizing the quality of framework fit must be made in order to minimize complications.Many researchers have argued that the consequences of lack of adequate fit could lead to both biologic and mechanical complications, such as, mucositis, periimplantitis, screw loosening, and fractures. [5][6][7][8][9] Although marginal misfit <150 μm has been considered clinically acceptable, 3,4 no threshold has been scientifically proven to prevent failures/complications. The heterogeneity of studies, differences in design and evaluation methods has made it difficult to achieve consensus.…”