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Fit accuracy assessment of removable partial denture frameworks produced by direct metal laser sintering - a clinical trial.

作者信息

Conceição Pedro Rodrigues, Franco Margarida, Alves Nuno, Portugal Jaime, Neves Cristina Bettencourt

机构信息

Dental Biomaterials Resarch Group (BIOMAT), Biomedical and Oral Science Research Unit (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.

Research Center on Health and Social Sciences (CARE), Polytechnic Institute of Portalegre (IPP), Portalegre, Portugal.

出版信息

Clin Oral Investig. 2025 Apr 18;29(5):253. doi: 10.1007/s00784-025-06336-y.


DOI:10.1007/s00784-025-06336-y
PMID:40249516
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12008063/
Abstract

OBJECTIVES: The purpose of this cross-over clinical study was to compare the number of framework repetitions, percentage of framework components adjusted, clinical acceptability, and fit accuracy of removable partial denture frameworks produced by the direct metal laser sintering technique (DMLS) and conventional technique. MATERIALS AND METHODS: For each dental arch (n = 26), two cobalt-chromium frameworks were produced through two protocols: direct metal laser sintering (experimental group) and conventional lost-wax casting technique (control group). The number of framework repetitions, the percentage of components that had to be adjusted, and the clinical acceptability were registered. The fit accuracy of functional components was assessed by a qualitative method using endodontic files to identify maladjustments and compared to a quantitative method based on silicone specimens digitized by micro-computed tomography. The normality was checked (Shapiro-Wilk test), and data were analyzed with McNemar, Wilcoxon and paired-t tests (α = 0.05). RESULTS: No statistically significant differences were found between conventional and digital frameworks for most of the variables tested (p > 0.05) except the fewer laboratory repetitions (p = 0.046), higher percentage of components adjusted (p = 0.011), and better reciprocal arms fit (p = 0.044) in the frameworks produced by DMLS protocol. No statistically significant (p = 0.174) difference was found between the fit accuracy qualitative and quantitative assessment methods. CONCLUSIONS: The DMLS and conventional protocols were similar. Despite the DMLS protocol exhibiting a higher percentage of components adjusted, it presented better reciprocal arms fit accuracy with no framework repetition. CLINICAL RELEVANCE: Metal frameworks can be produced using DMLS eliminating casting problems.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/dcc01951daad/784_2025_6336_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/a9b0bc44c2b5/784_2025_6336_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/659de1265eac/784_2025_6336_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/dcc01951daad/784_2025_6336_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/a9b0bc44c2b5/784_2025_6336_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/659de1265eac/784_2025_6336_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd71/12008063/dcc01951daad/784_2025_6336_Fig3_HTML.jpg

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Fit accuracy assessment of removable partial denture frameworks produced by direct metal laser sintering - a clinical trial.

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引用本文的文献

[1]
Optimization of Bond Strength Between Heat-Polymerized PMMA and Contemporary CAD/CAM Framework Materials: A Comparative In Vitro Study.

Polymers (Basel). 2025-5-27

本文引用的文献

[1]
Accuracy of Mandibular Removable Partial Denture Frameworks Fabricated by 3D Printing and Conventional Techniques.

Materials (Basel). 2024-6-27

[2]
A Comparison of the Structure and Selected Mechanical Properties of Cr/Co Alloys Obtained by Casting and Selective Laser Melting.

J Funct Biomater. 2024-3-1

[3]
Morphological Comparison of Residual Ridge in Impression for Removable Partial Denture between Digital and Conventional Techniques: A Preliminary In-Vivo Study.

J Clin Med. 2023-11-15

[4]
Patient-reported outcomes and framework fit accuracy of removable partial dentures fabricated using digital techniques: A systematic review and meta-analysis.

J Prosthodont. 2024-8

[5]
Patient Satisfaction and Accuracy of Partial Denture Frameworks Fabricated using Conventional and Digital Techniques.

Eur J Prosthodont Restor Dent. 2024-2-29

[6]
Fit accuracy in the rest region of RPDs fabricated by digital technologies and conventional lost-wax casting: a systematic review and meta-analysis.

BMC Oral Health. 2023-9-15

[7]
Clinical Applications and Mechanical Properties of CAD-CAM Materials in Restorative and Prosthetic Dentistry: A Systematic Review.

J Funct Biomater. 2023-8-17

[8]
Influence of fabrication method on the manufacturing accuracy and internal discrepancy of removable partial dentures: A systematic review and meta-analysis.

J Prosthet Dent. 2025-3

[9]
Clinical evaluation of removable partial dentures with digitally fabricated metal framework after 4 years of clinical service.

J Prosthodont. 2024-1

[10]
Evaluation of trueness and precision of removable partial denture metal frameworks manufactured with digital technology and different materials.

J Adv Prosthodont. 2023-4

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