Clinical evaluation of removable partial denture rest seat adaptation

Stern, Mitchell A.; Brudvik, James S.; Frank, Richard P.

doi:10.1016/0022-3913(85)90015-0

Cited by 74 publications

(62 citation statements)

References 5 publications

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“…Lee et al found a discrepancy of 0.24 mm, which was larger than the result in this study (0.06 mm). Stern et al found a misfit of 0.15 mm at the rest area in Kennedy class I and II groups. Their results could be considered clinically applicable, as their studies were performed for patients who had worn partial dentures for 6 years.…”

Section: Discussionmentioning

confidence: 96%

“…The average error of measurement was approximately 0.002 mm. As a basis for our evaluation of misfit, a distance of 0 to 0.05 mm was considered close contact (no gap), and a distance of 0.05 to 0.31 mm was defined as clinically acceptable fit …”

Section: Methodsmentioning

confidence: 99%

“…As a basis for our evaluation of misfit, a distance of 0 to 0.05 mm was considered close contact (no gap), and a distance of 0.05 to 0.31 mm was defined as clinically acceptable fit. 21,22 To evaluate overall trueness, 19 the output STL file of each framework was superimposed on the STL of the original design through dimple-elevation-to-corresponding-dimpleelevation matching, and best-fit alignment was also applied. The color-coded 3D surface deviation maps were visually displayed.…”

Section: Methodsmentioning

confidence: 99%

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Virtual Evaluation of the Accuracy of Fit and Trueness in Maxillary Poly(etheretherketone) Removable Partial Denture Frameworks Fabricated by Direct and Indirect CAD/CAM Techniques

Negm

Aboutaleb

Alam-Eldein

2019

Journal of Prosthodontics

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Purpose To compare the accuracy of fit and trueness of maxillary poly(etheretherketone) (PEEK) removable partial denture (RPD) frameworks fabricated by direct and indirect computer‐aided design/computer‐aided manufacturing (CAD/CAM) techniques. Materials and Methods A definitive maxillary class I master epoxy model was duplicated to create a stone cast. The cast was scanned, and an RPD was designed. Standard tessellation language (STL) data were used to fabricate 20 identical RPD frameworks using two CAD/CAM techniques: direct milling of PEEK and indirect additive manufacturing (resin printing combined with PEEK thermopressing using the lost‐wax technique). All the frameworks for each technique (n = 10) and the reference cast were scanned. To assess the accuracy of fit, a color map was constructed using metrology software, and the misfit (distance between each framework and the reference cast) was measured at 25 standardized points. To assess the overall trueness, each framework STL file was superimposed over the original design's STL file, and the average deviation was recorded in microns. Data were statistically analyzed using t‐test. Results Color mapping showed distinct pressure areas in the anterior and posterior straps of the major connector in the indirect technique, while a more uniform distribution of the color map was observed in the direct technique. A significant difference was found between the two techniques regarding the overall accuracy of fit. Compared with the indirect technique, the milled frameworks showed significantly better overall trueness (p < 0.001). Conclusions Although a significant difference in the overall fit accuracy was noted between both techniques, the fit was an acceptable clinical fit. The fabrication method affects the fit in the anterior and posterior strap areas. The frameworks of the direct technique revealed better overall trueness values compared with the indirect technique.

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Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Virtual Evaluation of the Accuracy of Fit and Trueness in Maxillary Poly(etheretherketone) Removable Partial Denture Frameworks Fabricated by Direct and Indirect CAD/CAM Techniques

Negm

Aboutaleb

Alam-Eldein

2019

Journal of Prosthodontics

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“…A definition of intimate contact used by previous researchers 10,11 used a tolerance of 50 mm or less as a measure of good fit. This was based on the limit of clinical detection of 50 mm marginal fit by visual examination and explorers applied to gold inlay castings.…”

Section: Discussionmentioning

confidence: 99%

“…These were chosen as they have a range of Shore hardness values (range [8][9][10][11][12][13][14][15][16][17] and are representative of duplicating silicone materials both on the UK market and internationally.…”

Section: Methodsmentioning

confidence: 99%