도재 소성과정이 Ni-Cr 금속도재관의 변연 및 내면 적합도에 미치는 영향
Effect of Porcelain Firing Process on the Marginal and Internal Fit of Ni-Cr Alloy Metal-Ceramic Crown
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The purpose of this study in vitro investigation was to compare the marginal and internal fit of Ni-Cr alloy metal ceramic crown before and afterporcelain veneering. Furthermore, this study evaluated whether the influence of the porcelain firing on the precision of fit of dental prostheses. Themaxillary right incisor was selected as an abutment for experiments. Ten working models were prepared. Ni-Cr alloy cores appropriate for eachabutment were prepared by lost wax technique. The marginal area and four internal areas of the crowns were measured at two stages: beforeveneering process and after upper porcelain firing. Silicone replica techniques were used. The data were statistically analyzed with the paired t-test(α=0.05). Mean±SD marginal and internal gap were 67.1±23.3 μm for the nickle chrome alloy core group and 74.4±21.9 μm for the metalceramic crown group. There were statistically significant differences in all investigated areas (p＜0.05). Within the limitations of this study, none ofthe Ni-Cr alloy metal crown values measured after porcelain firing process exceeded 120 μm, which is the clinically acceptable threshold.
Abstract
The purpose of this study in vitro investigation was to compare the marginal and internal fit of Ni-Cr alloy metal ceramic crown before and afterporcelain veneering. Furthermore, this study evaluated whether the influence of the porcelain firing on the precision of fit of dental prostheses. Themaxillary right incisor was selected as an abutment for experiments. Ten working models were prepared. Ni-Cr alloy cores appropriate for eachabutment were prepared by lost wax technique. The marginal area and four internal areas of the crowns were measured at two stages: beforeveneering process and after upper porcelain firing. Silicone replica techniques were used. The data were statistically analyzed with the paired t-test(α=0.05). Mean±SD marginal and internal gap were 67.1±23.3 μm for the nickle chrome alloy core group and 74.4±21.9 μm for the metalceramic crown group. There were statistically significant differences in all investigated areas (p＜0.05). Within the limitations of this study, none ofthe Ni-Cr alloy metal crown values measured after porcelain firing process exceeded 120 μm, which is the clinically acceptable threshold.
참고문헌 (23)
- Azer SS, "Effect of esthetic core shades on the final color of IPS Empress all-ceramic crown", J Prosthet Dent, 96, pp.397~401 (2006)
- Brecker SC, "Porcelain bakes to gold-a new medium in prosthodontics", J Prosthet Dent, 6, pp.801~810 (1956)
- Rosenstiel SF, "Contemporary fixed prosthodontics", pp.599~608 (2006), Mosby
- Wataha JC, "Alloys for prosthodontic restorations", J Prosthet Dent, 87, pp.351~363 (2002)
- Eliasson A, "A clinical evaluation of cobalt-chromium metal-ceramic fixed partial dentures and crowns: A three- to seven-year retrospective study", J Prosthet Dent, 98, pp.6~16 (2007)
- Shillingburg HT Jr, "Preparation design and margin disortion in porcelain-fused-to-metal restorations", J Prosthet Dent, 29, pp.276~284 (1973)
- Buchanan WT, "The effect of repeated firings and strength on marginal distortion in two ceramometal systems", J Prosthet Dent, 45, pp.502~506 (1981)
- Dederich DN, "The effect of repeated firings on the margins of nonprecious ceramometals", J Prosthet Dent, 51, pp.628~630 (1984)
- Anusavice KJ, "Effect of incompatibility stress on the fit of metal-ceramic crowns", J Dent Res, 66, pp.1341~1345 (1987)
- Shokry TE, "Effect of metal selection and porcelain firing on the marginal accuracy of titanium-based metal ceramic restorations", J Prosthet Dent, 103, pp.45~52 (2010)
- Pierce LH, "A status report of possible risks of base metal alloys and their components", J Prosthet Dent, 62, pp.234~238 (1989)
- Passon C, "The effect of multiple layes of die-spacer on crown retention", Oper Dent, 17, pp.42~49 (1992)
- Abbate MF, "Comparison of the marginal fit of various ceramic crown systems", J Prosthet Dent, 61, pp.527~531 (1989)
- Reich S, "Measurement of cement thickness under lithium disilicate crowns using an impression material technique", Clin Oral Investig, 15, pp.521~526 (2011)
- Colpani JT, "Evaluation of marginal and internal fit of ceramic crown copings", Dent Mater, 29, pp.174~180 (2013)
- Komine F, "Influence of porcelain-firing procedures on the marginal distortion of electroformed metal-ceramic restorations", Quintessence Int, 38, pp.E583~E588 (2007)
- Balkaya MC, "Influence of firing cycles on the margin distortion of 3 all-ceramic crown systems", J Prosthet Dent, 93, pp.346~355 (2005)
- Campbell SD, "Thermal cycling distortion of metal ceramics: part I―metal collar width", J Prosthet Dent, 67, pp.603~608 (1992)
- Council on Dental Materials and Devices, "Revised American National Standards Institute", American Dental Association specification No. 8 for zinc phosphate cement, 1978, pp.96, 121~123
- Sorensen SE, "Gingival and alveolar bone reaction to marginal fit of subgingival crown margins", Scand J Dent Res, 94, pp.109~114 (1986)
- Assif D, "The flow of zinc phosphate cement under a full coverage restoration and its effect on marginal adaptation according to the location of cement application", Quintessence Int, 18, pp.765~774 (1987)
- Hung SH, "Marginal fit of porcelain-fused-to metal and two types of ceramic crown", J Prosthet Dent, 63, pp.26~31 (1990)
- McLean JW, "The estimation of cementfilm thickness by an in vivo technique", Br Dent J, 131, pp.107~111 (1971)