Effects of metal surface grinding at the porcelain try-in stage of fixed dental prostheses
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
PURPOSE. This study was to evaluate the effect of grinding of the inner metal surface during the porcelain try-in stage on metal-porcelain bonding considering the maximum temperature and the vibration of samples. MATERIALS AND METHODS. Ninety-one square prism-shaped (1 × 1 × 1.5 mm) nickel-chrome cast frameworks 0.3 mm thick were prepared. Porcelain was applied on two opposite outer axial surfaces of the frameworks. The grinding was performed from the opposite axial sides of the inner metal surfaces with a low-speed handpiece with two types of burs (diamond, tungsten-carbide) under three grinding forces (3.5 N, 7 N, 14 N) and at two durations (5 seconds, 10 seconds). The shear bond strength (SBS) test was performed with universal testing machine. Statistical analyzes were performed at 5% significance level. RESULTS. The samples subjected to grinding under 3.5 N showed higher SBS values than those exposed to grinding under 7 N and 14 N (P<.05). SBS values of none of the groups differed from those of the control group (P>.05). The types of bur (P=.965) and the duration (P=.679) did not affect the SBS values. On the other hand, type of bur, force applied, and duration of the grinding affected the maximum temperatures of the samples, whereas the maximum vibration was affected only by the type of bur (P<.05). CONCLUSION. Grinding the inner metal surface did not affect the metalporcelain bond strength. Although the grinding affected the maximum temperature and the vibration values of the samples, these did not influence the bonding strength.
Abstract
PURPOSE. This study was to evaluate the effect of grinding of the inner metal surface during the porcelain try-in stage on metal-porcelain bonding considering the maximum temperature and the vibration of samples. MATERIALS AND METHODS. Ninety-one square prism-shaped (1 × 1 × 1.5 mm) nickel-chrome cast frameworks 0.3 mm thick were prepared. Porcelain was applied on two opposite outer axial surfaces of the frameworks. The grinding was performed from the opposite axial sides of the inner metal surfaces with a low-speed handpiece with two types of burs (diamond, tungsten-carbide) under three grinding forces (3.5 N, 7 N, 14 N) and at two durations (5 seconds, 10 seconds). The shear bond strength (SBS) test was performed with universal testing machine. Statistical analyzes were performed at 5% significance level. RESULTS. The samples subjected to grinding under 3.5 N showed higher SBS values than those exposed to grinding under 7 N and 14 N (P<.05). SBS values of none of the groups differed from those of the control group (P>.05). The types of bur (P=.965) and the duration (P=.679) did not affect the SBS values. On the other hand, type of bur, force applied, and duration of the grinding affected the maximum temperatures of the samples, whereas the maximum vibration was affected only by the type of bur (P<.05). CONCLUSION. Grinding the inner metal surface did not affect the metalporcelain bond strength. Although the grinding affected the maximum temperature and the vibration values of the samples, these did not influence the bonding strength.
참고문헌 (20)
- Lombardo GH., "Influence of surface treatment on the shear bond strength of ceramics fused to cobalt-chromium", J Prosthodont, 19, pp.103~111 (2010)
- Shillingburg HT., "Fundamentals of Fixed Prosthodontics", pp.455~484 (1997), Quintessence Publishing Co.
- do Prado RA., "Shear bond strength of dental porcelains to nickel-chromium alloys", Braz Dent J, 16, pp.202~206 (2005)
- Shillingburg HT Jr., "Preparation design and margin distortion in porcelain-fused-to-metal restorations", J Prosthet Dent, 29, pp.276~284 (1973)
- Faucher RR., "Distortion related to margin design in porcelain-fused-to-metal restorations", J Prosthet Dent, 43, pp.149~155 (1980)
- Tao J., "The effect of finish line curvature on marginal fit of all-ceramic CAD", CAM crowns and metal-ceramic crowns, 2009, pp.40, 745~752
- Gemalmaz D., "Marginal fit changes during porcelain firing cycles", J Prosthet Dent, 73, pp.49~54 (1995)
- Papazoglou E., "Evaluation of high-temperature distortion of high-palladium metal-ceramic crowns", J Prosthet Dent, 85, pp.133~140 (2001)
- Ushiwata O., "Marginal fit of nickel-chromium copings before and after internal adjustments with duplicated stone dies and disclosing agent", J Prosthet Dent, 83, pp.634~643 (2000)
- Keys LG., "An alternate method of verifying the seating of allceramic restorations", J Prosthet Dent, 87, pp.411~ (2002)
- Song XF., "In vitro rapid intraoral adjustment of porcelain prostheses using a high-speed dental handpiece", Acta Biomater, 4, pp.414~424 (2008)
- Kourtis SG., "Spectrophotometric evaluation of the optical influence of different metal alloys and porcelains in the metal-ceramic complex", J Prosthet Dent, 92, pp.477~485 (2004)
- Aladağ A., "Effects of soldering and laser welding on bond strength of ceramic to metal", J Prosthet Dent, 105, pp.28~34 (2011)
- de Vasconcellos LG., "Opaque layer firing temperature and aging effect on the flexural strength of ceramic fused to cobalt-chromium alloy", J Prosthodont, 19, pp.471~477 (2010)
- "ISO 9693-1:2012. Dentistry--Compatibility testing-Part 1: Metal-ceramic systems", International Organization for Standardization, ~ (2013)
- Hero H., "Carbon impurities and properties of some palladium alloys for ceramic veneering", Dent Mater, 1, pp.106~110 (1985)
- Hammad IA., "Designs of bond strength tests for metal-ceramic complexes : review of the literature", J Prosthet Dent, 75, pp.602~608 (1996)
- Brackett SE., "An evaluation of porcelain strength and the effect of surface treatment", J Prosthet Dent, 61, pp.446~451 (1989)
- Leinfelder KF., "Porcelain esthetics for the 21st century", J Am Dent Assoc, 131, pp.47S~51S (2000)
- Isgrò G., "The influence of the veneering porcelain and different surface treatments on the biaxial flexural strength of a heat-pressed ceramic", J Prosthet Dent, 90, pp.465~473 (2003)