Factors affecting the retention and fit of gold castings

Marker, Victoria A.; Miller, Amp W.; Miller, Bess; Swepston, Jack H.

doi:10.1016/0022-3913(87)90007-2

Cited by 25 publications

(21 citation statements)

References 15 publications

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“…Marker et al 13 in a study principally designed to examine the effect of variations in materials and techniques on the retention and fit of gold castings also found no correlation between frictional load (uncemented retention) and retention after cementation. As a part of the study they investigated castings constructed on dies coated with and without four layers of aeroplane dope as a die-spacer; Marker et al noted that 70 per cent of the unspaced casting showed measurable frictional retention and had significantly lower retention values when cemented compared with the die-spaced castings.…”

Section: Die-spacing and Crown Retention A) Pre-cementation Retentionmentioning

confidence: 99%

“…Campagni et al 11 measured the thickness of paint-on die spacers and found that two coats of aeroplane dope § were each 10 m thick and two coats of a proprietary cement spacer , were 23 m thick. Campagni et al 12 used six coats of aeroplane dope § and Marker et al 13 used four layers of the same material as a die-spacer. Campagni et al 12 reported the estimated die-spacer thickness was 20.84 to 39.12 m based on a previous study but Marker et al did not report a measurement of die-spacer thickness.…”

Section: Die-spacingmentioning

confidence: 99%

“…Marker et al 13 found 55 per cent of castings constructed on dies coated with four layers of aeroplane dope § s h owed increased retention ove r unspaced castings. These findings are interesting as die-spacer was applied to within 1 mm of the finish line and may be more readily explained, as noted by the authors, by variations in materials and procedures than as a result of the die-spacer alone.…”

mentioning

confidence: 99%

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The effects of die‐Spacidng on post‐cementation crown elevation and retention

Carter¹,

Wilson

1997

Australian Dental Journal

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This paper reviews the relevant dental literature concerning the effect of die-spacing on crown elevation and pre-and post-cementation crown retention. Techniques of providing die-spacing and measurement of the thickness of die-spacer are discussed. A review of the role of the provision of a cement space in reducing post-cementation crown elevation is presented. Factors which may affect crown retention prior to and following cementation are also reviewed. The influence of variables in techniques and experimental design on the results of the studies reviewed is discussed.Key words: Die-spacing, crown elevation, pre-cementation retention, post-cementation retention.(Received for publication January 1996. Revised March 1996 Accepted April 1996.) IntroductionFull crowns frequently do not seat with minimal m a r ginal discrepancy following cementat i o n .

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Section: Die-spacing and Crown Retention A) Pre-cementation Retentionmentioning

confidence: 99%

Section: Die-spacingmentioning

confidence: 99%

mentioning

confidence: 99%

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The effects of die‐Spacidng on post‐cementation crown elevation and retention

Carter¹,

Wilson

1997

Australian Dental Journal

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“…Additionally, axial wall cement space can influence the retention of fixed prostheses, with too thin of cementation space reported to reduce retention. 4,5 Three-dimensional relationships can be approximately described by data taken from serial cross-sections of cemented prostheses. [6][7][8] Although inherently destructive and timeconsuming, this technique is adequately so long as cement space dimensions do not change rapidly over the slice-to-slice distances used and slices randomly select any systematic anomalies.…”

Section: Introductionmentioning

confidence: 99%

Two imaging techniques for 3D quantification of pre-cementation space for CAD/CAM crowns

Rungruanganunt

Kelly

Adams

2010

Journal of Dentistry

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“…7,8 The possibility that ultrasonic instrumentation may cause fragility of the zinc phosphate cement has been widely accepted for intraradicular retainers 9-11 but little is known about its action on crowns and fixed partial dentures. 12,13 Thus, the objective of the present study was to determine the in vitro effect of ultrasonic instrumentation on the bond strength of crowns cemented with a zinc phosphate agent to teeth receiving standardized preparations compared to that observed on teeth not submitted to instrumentation.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study

Filho¹,

Mori

Jardini³

et al. 2008

Braz. oral res.

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Several studies have reported the benefits of sonic and/or ultrasonic instrumentation for root debridement, with most of them focusing on changes in periodontal clinical parameters. The present study investigated possible alterations in the tensile bond strength of crowns cemented with zinc phosphate cement to natural teeth after ultrasonic instrumentation. Forty recently extracted intact human third molars were selected, cleaned and stored in physiologic serum at 4°C. They received standard preparations, at a 16º convergence angle, and AgPd alloy crowns. The crowns were cemented with zinc phosphate cement and then divided into four groups of 10 teeth each. Each group was then subdivided into two subgroups, with one of the subgroups being submitted to 5,000 thermal cycles ranging from 55 ± 2 to 5 ± 2°C, while the other was not. Each group was submitted to ultrasonic instrumentation for different periods of time: group 1 -0 min (control), group 2 -5 min, group 3 -10 min, and group 4 -15 min. Tensile bond strength tests were performed with an Instron testing machine (model 4310). Statistical analysis was performed using ANOVA and Tukey's test at the 5% level of significance. A significant reduction in the tensile bond strength of crowns cemented with zinc phosphate and submitted to thermal cycles was observed at 15 min (196.75 N versus 0 min = 452.01 N, 5 min = 444.23 N and 10 min = 470.85 N). Thermal cycling and ultrasonic instrumentation for 15 min caused a significant reduction in tensile bond strength (p < .05).

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Factors affecting the retention and fit of gold castings

Cited by 25 publications

References 15 publications

The effects of die‐Spacidng on post‐cementation crown elevation and retention

The effects of die‐Spacidng on post‐cementation crown elevation and retention

Two imaging techniques for 3D quantification of pre-cementation space for CAD/CAM crowns

Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study

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