Adaptation of removable partial denture frameworks fabricated by selective laser melting

<p>A Scoping Review on the Accuracy of Fit of Removable Partial Dentures in a Developing Digital Context</p>

“…In addition, a study used PVC as a registration material to compare the fit of SLM produced -RPD frameworks and conventionally produced RPDs when fitted to models in an "in vitro" study. 41 It was shown that the average gap of the RP frameworks was larger than those of conventional RPDs in three cases while no difference was found in one case. 41 Thus, this study goes some way to confirm the findings of the study discussed immediately above.…”

“…41 It was shown that the average gap of the RP frameworks was larger than those of conventional RPDs in three cases while no difference was found in one case. 41 Thus, this study goes some way to confirm the findings of the study discussed immediately above. However, a study reports that although both conventional and 3D-printing methods of framework fabrication revealed clinically acceptable adaptation, the conventional cast RPD groups revealed better overall fit and accuracy.…”

“…and "framework", "CAD/CAM" and "removable partial dentures", "CAD" and "removable partial denture", "RP" and "RPDs", "RP" and "removable dentures", "RP" and "removable prosthesis", "Digitally designed" and "removable dentures", "Digital removable partial dentures", "Rapid manufacturing" and "removable dentures" between these surfaces by measuring the thickness of filling material. [22][23][24][25][26][27] Others used silicone to assess the accuracy of fit of a RP-produced clasp on a tooth, and compared it to a conventionally produced clasp on atooth. 26,27 A study fabricated a replica using polyvinyl siloxane (PVC) and analyzed the accuracy of the RPD framework.…”

Influence of reinforcement bar on accuracy of removable partial denture framework fabricated by casting with a 3D-printed pattern and selective laser sintering

“…The present study also focused on the rests, which are the most important parts for accurate fit of the metal framework, and the major connector, which is believed to exhibit the greatest amount of deformation during metal additive manufacturing. To date, many studies have used silicon impression material to measure the gap between the working cast and the metal framework to evaluate accuracy of the fit [14,20,21,24]; however, it is not possible to evaluate the direction of displacement by this method. In the present study, the design and fabrication data were superimposed in three dimensions, thus allowing evaluation of the direction of displacement.…”

“…In particular, major deformation of the central area of the lingual bar has been reported [19]. Presently, this problem is generally addressed by configuring a reinforcement bar in the CAD data in advance to prevent deformation [14,17,20]. The reinforcement bar is currently set based on the experience and intuition of the dental technician handling the CAD data, and there is a lack of specific/established design criteria.…”