Custom impression trays: Part I—Mechanical properties

Breeding, Larry C.; Dixon, Donna L.; Moseley, Jon

doi:10.1016/0022-3913(94)90252-6

Cited by 14 publications

(8 citation statements)

References 7 publications

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“…33 However, the thermoplastic properties may cause distortion during impression making. Breeding et al 27 found that polymethylmethacrylate resin exhibited significantly higher mechanical property values than the thermoplastic resins tested. Moseley et al 34 found that yielding could be decreased by increasing the thickness of the tray material.…”

mentioning

confidence: 98%

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

Thongthammachat¹,

Moore²,

Barco³

et al. 2002

Journal of Prosthodontics

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mentioning

confidence: 98%

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

Thongthammachat¹,

Moore²,

Barco³

et al. 2002

Journal of Prosthodontics

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“…Materials Properties: The proper value of the modulus of elasticity "E" and Poisson's ratio "ν"are shown in Table (1).Mesh Generation: A fine mesh of the finite element model generated using the 8 -node isoparametric element as shown in Figure (1). The 8 -node elements having two degree of freedom at each node, define the translation in the nodal X and Y directions at each node.…”

Section: Methodsmentioning

confidence: 99%

“…The material of custom trays should have better dimensional stability and more accuracy to obtain the denture base with less dimensional changes and better stress distribution on the edentulous residual ridge (1,2) . Finite element method is a powerful research tool used to examine complex mechanical behavior of prosthesis and surrounding structures that are other wise difficult to assess.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Acrylic Denture Produced from Metal Stock Tray

Hatim¹,

Abdul-Razaq²,

Al-Zubaidy³

2009

RDENTJ

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Aims: To determine stress analysis exerted by denture on the edentulous alveolar bone in the premolar region represented by stone cast produced from metal stock tray using linear finite element method. Materials and methods: Metal perforated stock tray was used to produce stone cast that represent the denture base and the underlying bone using silicone impression material. The dimension of the cross section of the stone cast was measured using Dimax program, then the data collected was entering Excel program for making the figures. The dimension of the cross section of the stone cast entering finite element program and other new auxiliary program prepared specially for this study for finite element analysis. Results: After the data was analyzed, the results were drawn in figures using surfer 7 program. High compressive, tensile, deflection, shear and maximum principal stress values were observed below the point of force application and in the underlying structure with different values and locations according to the analysis in the mucous membrane and in the underlying bone in the X and Y axes. Conclusions: By using finite element analysis, the more stress concentration and deflection were found below the point of force application, in the mucous membrane, at the beginning of the cortical bone and along the buccal vestibule.

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“…Their purpose is to make a precise duplicate of the oral surrender tissue and then pour the impression. Several factors affect the precision of impression materials, they include; impression material manipulation [1], thermal changes after removal [2], kind of impression material [3], tray impression retention [4], tray deformation [5], impression tray design [6] impression material thickness [7], impression technique and impression removal [8].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Impression Accuracy Making with Different Kind of Tray

Shisheyan¹,

Amrai²,

Puriyani³

et al. 2016

SJAMS

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The aim of this study was to evaluate how tray shape (half or full arch) and impression procedure affect the precision of impressions. Half arch and full arch trays in metal and plastic were utilized in combination with a two stage impression technique. For each technique-tray combination, 10 impressions were made of a master cast with two steel rod representing the mandibular left first premolar and first molar, where a standard steel rod was placed. Each steel abutment had four marks, which served as a reference point. With a universal measuring microscope, the x-, y-, and zcoordinates were computed for each mark on the master cast and impressions. The span between marks and the reference point on the impressions were calculated and compared with those of the master cast. All techniques employed with the full arch metal trays and the plastic trays had distances that were not significantly different from the master cast (P < 0.05), while for the half arch plastic trays, it was different from the distance in master cast but the distances were not significantly different from the master cast (P < 0.05). Half arch plastic trays produced correct impressions. When full arch were employed, the full arch metal tray impressions were dimensionally better than full arch plastic impressions.

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Custom impression trays: Part I—Mechanical properties

Cited by 14 publications

References 7 publications

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

Dimensional accuracy of dental casts: Influence of tray material, impression material, and time

Finite Element Analysis of Acrylic Denture Produced from Metal Stock Tray

Evaluation of Impression Accuracy Making with Different Kind of Tray

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