Effects of image and education on the precision of the measurement method for evaluating prosthesis misfit

Mai, Hang‐Nga; Lee, Kyeong Eun; Ha, Jung‐Hong; Lee, Du‐Hyeong

doi:10.1016/j.prosdent.2017.05.022

Cited by 15 publications

(13 citation statements)

References 25 publications

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“…In previous studies, the CSM method [40,48] and SRT method [5,14,22,23] showed higher reliability than the other methods. However, many studies prefer the SRT method because it is a non-destructive and accurate method [22,23,26,30,59].…”

Section: Discussionmentioning

confidence: 99%

“…In addition to the methods examined in our study, there are many fitness assessment methods that have been applied by others [14,28,30,40,48,60]. Also, the assessment methods used in various studies may differ depending on the environment of the laboratory.…”

Section: Discussionmentioning

confidence: 99%

“…All gap measurements were made by the same researcher. Since the researcher’s expertise could greatly impact the accuracy of the prosthesis fitness evaluation [48], assessments were conducted only after substantial training and practice.…”

Section: Methodsmentioning

confidence: 99%

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A Comparison Study of Marginal and Internal Fit Assessment Methods for Fixed Dental Prostheses

Lee

Kang

et al. 2019

JCM

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Numerous studies have previously evaluated the marginal and internal fit of fixed prostheses; however, few reports have performed an objective comparison of the various methods used for their assessment. The purpose of this study was to compare five marginal and internal fit assessment methods for fixed prostheses. A specially designed sample was used to measure the marginal and internal fit of the prosthesis according to the cross-sectional method (CSM), silicone replica technique (SRT), triple scan method (TSM), micro-computed tomography (MCT), and optical coherence tomography (OCT). The five methods showed significant differences in the four regions that were assessed (p < 0.001). The marginal, axial, angle, and occlusal regions showed low mean values: CSM (23.2 µm), TSM (56.3 µm), MCT (84.3 µm), and MCT (102.6 µm), respectively. The marginal fit for each method was in the range of 23.2–83.4 µm and internal fit (axial, angle, and occlusal) ranged from 44.8–95.9 µm, 84.3–128.6 µm, and 102.6–140.5 µm, respectively. The marginal and internal fit showed significant differences depending on the method. Even if the assessment values of the marginal and internal fit are found to be in the allowable clinical range, the differences in the values according to the method should be considered.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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A Comparison Study of Marginal and Internal Fit Assessment Methods for Fixed Dental Prostheses

Lee

Kang

et al. 2019

JCM

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“…Specific sectioning strategies, such as the use of fiducial markers or cutting devices, have been suggested in several studies to help reduce the possibility of sectioning error [26,29,32,38,40]. Reading error is another issue among observers during the manual selection of measurement points to measure the marginal gap in the acquired images [45]. Thus, suitable standardized procedures are necessary to increase the reliability and reproducibility of the outcomes of individual experiment studies and minimize the bias risk in the meta-analysis performed on the studies.…”

Section: Discussionmentioning

confidence: 99%

Reliability of Metal 3D Printing with Respect to the Marginal Fit of Fixed Dental Prostheses: A Systematic Review and Meta-Analysis

et al. 2020

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Three-dimensional (3D) printing technologies have been widely used to manufacture crowns and frameworks for fixed dental prostheses. This systematic review and meta-analysis aimed to assess the reliability of the marginal fit of 3D-printed cobalt-chromium-based fixed dental prostheses in comparison to conventional casting methods. Articles published until 25 June 2020, reporting the marginal fit of fixed prostheses fabricated with metal 3D printing, were searched using electronic literature databases. After the screening and quality assessment, 21 eligible peer-reviewed articles were selected. Meta-analysis revealed that the marginal gap of the prostheses manufactured using 3D printing was significantly smaller compared to that manufactured using casting methods (standard mean difference (95% CI): −0.92 (−1.45, −0.38); Z = −3.37; p = 0.0008). The estimated difference between the single and multi-unit types did not differ significantly (p = 0.3573). In the subgroup analysis for the measurement methods, the tendency of marginal discrepancy between the 3D printing and casting groups was significantly different between articles that used direct observation and those that used the silicone replica technique (p < 0.001). Metal 3D printing technologies appear reliable as an alternative to casting methods in terms of the fit of the fixed dental prostheses. In order to analyze the factors influencing manufacturing and confirm the results of this review, further controlled laboratory and clinical studies are required.

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“…Marginal discrepancy can be evaluated by measuring the distance between the most extended point of the prosthesis margin and the marginal line of the prepared abutment 16. As for measurement methods of marginal discrepancy, direct detection by dental explorer and indirect silicone replica technique has commonly been implemented in the clinic 20. Currently, with the advent of digital technologies in dentistry, the space between the prosthesis and abutment can be three-dimensionally visualized, and diverse quantitative geometric analyses can be performed 11…”

Section: Introductionmentioning

confidence: 99%

Comparative clinical study of the marginal discrepancy of fixed dental prosthesis fabricated by the milling-sintering method using a presintered alloy

Kim

Mai

et al. 2019

J Adv Prosthodont

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PURPOSEThe present study was designed to examine the clinical fit of fixed dental prosthesis fabricated by the milling-sintering method using a presintered cobalt-chromium alloy.MATERIALS AND METHODSTwo single metal-ceramic crowns were fabricated via milling-sintering method and casting method in each of the twelve consecutive patients who required an implant-supported fixed prosthesis. In the milling-sintering method, the prosthetic coping was designed in computer software, and the design was converted to a non-precious alloy coping using milling and post-sintering process. In the casting method, the conventional manual fabrication process was applied. The absolute marginal discrepancy of the prostheses was evaluated intraorally using the triple-scan technique. Statistical analysis was conducted using Mann-Whitney U test (α=.05).RESULTSEight patients (66.7%) showed a lower marginal discrepancy of the prostheses made using the milling-sintering method than that of the prosthesis made by the casting method. Statistically, the misfit of the prosthesis fabricated using the milling-sintering method was not significantly different from that fabricated using the casting method (P=.782). There was no tendency between the amount of marginal discrepancy and the measurement point.CONCLUSIONThe overall marginal fit of prosthesis fabricated by milling-sintering using a presintered alloy was comparable to that of the prosthesis fabricated by the conventional casting method in clinical use.

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Effects of image and education on the precision of the measurement method for evaluating prosthesis misfit

Cited by 15 publications

References 25 publications

A Comparison Study of Marginal and Internal Fit Assessment Methods for Fixed Dental Prostheses

A Comparison Study of Marginal and Internal Fit Assessment Methods for Fixed Dental Prostheses

Reliability of Metal 3D Printing with Respect to the Marginal Fit of Fixed Dental Prostheses: A Systematic Review and Meta-Analysis

Comparative clinical study of the marginal discrepancy of fixed dental prosthesis fabricated by the milling-sintering method using a presintered alloy

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