Relative accuracy of four removable die systems

Myers, Michael L.; Hembree, John H.

doi:10.1016/0022-3913(82)90105-6

Cited by 16 publications

(13 citation statements)

References 12 publications

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“…This was similar to the results obtained in the previous studies. 2,3,12,14 The displacement of the dies can be attributed to:…”

Section: Discussionmentioning

confidence: 99%

“…This was in agreement with the result of the other investigators. 2,3,[12][13][14][15][16][17] This difference indicated the amount of vertical and horizontal displacements of each die within a group. The displacement exhibited both a positive value and a negative value.…”

Section: Discussionmentioning

confidence: 99%

“…The master model simulated a quadrant cast with three evenly spaced machined cylindrical inserts. 2 The central cylindrical insert was the replica of a preparation to receive a single full metal crown with a uniform shoulder of 1 mm and a taper of 6°. 5,6 The central insert was to be made a removable die.…”

Section: Methodsmentioning

confidence: 99%

“…However, separation of individual dies from the working cast requires that the dies should seat in the cast accurately, solidly, and positively in precisely the same position that they had occupied prior to the removal, even after repeated removal during the course of laboratory procedures. 1,2 This is important in order to maintain an accurate relationship between the prepared teeth, adjacent, and opposing teeth to obtain a cast restoration that has correct occlusal and proximal contours as well as marginal fit. 3 Over a period of time, various concepts and techniques have been advocated for making removable die systems.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Relative Accuracy of Three Commercially Available Removable Die Systems of Different Configurations: An in vitro Study

Pasam¹,

Arora²,

Gupta³

et al. 2017

Journal of Oral Health and Community Dentistry

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Introduction:The positional shift observed in removable die systems before and after sectioning the master cast may result in a cast restoration with improper occlusal and proximal contacts and marginal fit, thereby requiring time-consuming chairside adjustments.Aim: This study was done to evaluate the relative accuracy of three commercially available removable die systems with different configurations by measuring the average die displacement before and after sectioning of the cast. Materials and methods:A total of 60 impressions were made of the standardized brass master model using polyvinylsiloxane. Impressions were divided into three groups. For each group, a different removable die system was used. Group I: cross pin; group II: M R pin; and group III: conventional brass dowel pin. The presectioning measurement both in the horizontal and vertical directions of all the 60 casts obtained were made using profile projector. The casts were then sectioned and removed and replaced 30 times, and the postsectioning measurements were made using the same references. The differences between the presectioning and the postsectioning measurements were calculated Statistical analysis used: The data were analyzed using analysis of variance (ANOVA) and Tukey's multiple comparison test.Results: All the three die systems exhibited displacement both in the horizontal and vertical directions before and after sectioning the casts. Brass dowel pin exhibited the greatest amount of displacement both in the horizontal and vertical directions. Conclusion:The use of more than one pin and the presence of metallic or plastic sleeves can result in improved accuracy and stability of the die system.

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“…This was similar to the results obtained in the previous studies. 2,3,12,14 The displacement of the dies can be attributed to:…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Relative Accuracy of Three Commercially Available Removable Die Systems of Different Configurations: An in vitro Study

Pasam¹,

Arora²,

Gupta³

et al. 2017

Journal of Oral Health and Community Dentistry

View full text Add to dashboard Cite

show abstract

“…The master casts on which fixed prostheses are fabricated must properly reproduce an abutment whether the case involves a single unit or multiple units in an entire arch rehabilitation. [1][2][3] They must achieve certain specifications with respect to dimensional accuracy, detail reproduction, surface hardness, abrasive resistance, compatibility with impression materials, transverse strength, ease of manipulation, and lack of toxicity. 4 Improved dental stone and epoxy resin are the most popular materials in dentistry for constructing master casts for fixed prostheses, even though a resin-reinforced gypsum product, a polyurethane resin, and silver and copper electroplated die systems have all been used.…”

mentioning

confidence: 99%