Clinical Evaluation of Removable Partial Denture Constructed From 3d Printed Resin Pattern Designed Using Cad Cam Technology

Abstract

INTRODUCTION:Computer-assisted design, computer-assisted manufacture (CAD/CAM) can be successfully applied to the fabrication of removable partial denture (RPD) alloy frameworks and replace laboratory crafting techniques. The CAD/CAM techniques have been widely used for a long time to manufacture dental prostheses. Computer-aided technologies allow more precise and systematic modeling, and could therefore reduce the burdensome steps of both chair-side and laboratory work, saving vital time. OBJECTIVES: This study was aimed to compare between the accuracy of chrome-cobalt removable partial denture frameworks designed and fabricated using CAD/CAM technique with that fabricated using conventional technique MATERIALS AND METHODS: Seven maxillary bilateral partially edentulous patients having Class III modification 1 Kennedy classification were selected from those attended to the prosthodontic department, Faculty of Dentistry, Alexandria University. For each patient, two different cobalt chromium removable partial frameworks were constructed; the first one was fabricated using CAD CAM technique (group A)and the other framework was fabricated using conventional manufacturing technique(group B) and were compared through evaluation of: (1) Guiding plane/plate relation. (2) Accuracy of fit of occlusal rests and major connector. RESULTS: all removable partial dentures fabricated by CAD/CAM technology showed increased improvement of accurate adaptation of the palatal strap major connector, guiding plane\plate relation and fit of occlusal rest, also it was less time consuming and economic need compared to conventional technique. CONCLUSIONS: The use of CAD/CAM technology for fabrication of removable partial denture frameworks should be widely applied because of its favorable clinical accuracy.

Patient‐reported outcomes and framework fit accuracy of removable partial dentures fabricated using digital techniques: A systematic review and meta‐analysis

“…All of the included studies were clinical randomized studies; four were crossover studies, [39][40][41][42] one was a randomized parallel groups clinical trial, 31 and five studies used within subject study design. 25,32,[43][44][45] The earliest study was published in 2017, 45 and the latest in 2022. 25,31 Populations of all studies were patients attending prosthodontic clinics of dental schools.…”

Fit Accuracy of Cobalt–Chromium and Polyether Ether Ketone Prosthetic Frameworks Produced Using Digital Techniques: In Vitro Pilot Study

“…The current study used a qualitative analog method based on direct inspection of the gap between the framework components and the model surface, using image amplification and calibrated endodontic instruments (endodontic plugger #35 and file #50). A qualitative assessment using calibrated endodontic instruments was previously described by Conceição et al [33]. A similar method based on using a calibrated orthodontic wire of 500 µm has already been described by other authors [32].…”

“…(i) direct measurement using calibrated instruments (e.g., orthodontic endodontic pluggers) [7,32,33] and (ii) indirect methods that involve the use materials (e.g., silicone) to fill in the putative gap [3,29,31].…”

“…The assessment methods can also be distinguished based on the type of tools used and the data collection technique. Thus, analog methods include (i) direct measurement using calibrated instruments (e.g., orthodontic arch wires or endodontic pluggers) [7,32,33] and (ii) indirect methods that involve the use of elastomeric materials (e.g., silicone) to fill in the putative gap [3,29,31].…”

Comparison between digital superimposition and microcomputed tomography methods of fit assessment of removable partial denture frameworks

“…24,25 These sensitive techniques can lead to errors because of the low dimension and resilience of the impression materials. 8,9,12,[26][27][28][29][30][31][32][33] Digital techniques, such as digital microscopy, can identify errors imperceptible to the human eye and overcome the limitations of analog methods. 19,32,34 Furthermore, image capture digital techniques, such as microcomputed tomography (mCT), have been used as high-precision and high-resolution techniques in various fields of biomedical analysis.…”