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Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
Clinical efficacy of maxillary digital removable partial dentures based on direct intraoral scanning and selective
Chenyuan Zhu1, Mengxin Yao2, Chengyi Wang3
1Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China.
Objectives:
A double-blind randomized controlled crossover clinical trial was conducted to comprehensively evaluate the treatment of maxillary removable partial dentures (RPDs) fabricated using a digital workflow.
Methods:
A total of 58 patients were enrolled. The digital procedure involves direct intraoral scanning (IOS), digital design, selective laser melting (SLM) printing Cr-Co metal framework, and the usage of digitally printed resin cast. The outcomes were evaluated from the perspectives of adaptation, clinician evaluation, and patient-centered evaluation.
Results:
The adaptation between the two types of dentures showed no statistical difference [RPD-LWT: 274.8(213.50,337.55)μm; RPD-SLM: 302.30(244.40, 368.50) μm; P=0.172). The Kennedy classification and the number of missing teeth would have an impact on the adaptation of RPD SLM. At the 7-day follow-up (T2), there were no significant statistical differences between the two dentures in all indicators in terms of clinician's evaluation. Both groups significantly improved patients' quality of life when compared with baseline measurements. This improvement was mainly reflected by reductions in pain-discomfort levels and psychosocial impacts. The patient's satisfactory with both dentures was statistically similar (P=0.591).
Conclusions:
The RPD-SLM and RPD-LWT showed statistically similar results in terms of adaptation, clinician evaluation, and patient-centered evaluation in this in vivo study.
Clinical Significance Statement:
This study systematically and comprehensively evaluated the in vivo performance of RPD-SLM compared to RPD-LWT. The findings from this analysis suggest the combination of direct IOS and SLM can be effectively utilized for fabricating maxillary RPDs. This study provides valuable clinical evidence supporting the application of digital technology in RPDs.
Trial Registration:
China Clinical Trial Registration Center (ChiCTR-ONC-16009899 Registered 17 November 2016, https://www.chictr.org.cn/showproj.html?proj=16865).
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