CAD/CAM 3-unit bridges의 변연 적합도에 관한 연구
A study on the marginal fit of CAD/CAM 3-unit bridges
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연구 목적: 본 연구에서는CAD/CAM (computer-aided design / computer-aided manufacturing) 시스템으로 제작된LAVA (3M ESPE, Seefeld, Germany) 3-unit bridge와 통상적인 방법으로 제작된 PFG 3-unit bridge의 변연 적합도를 비교 분석해 보고자 한다. 연구 재료 및 방법: 레진치를 전부 도재관을 위한 삭제를 시행하고 인상 채득하여 레진 모형 (Exakto-form model resin, Bredent, Senden, Germany)을군당10개씩 제작하였다. 레진 모형의 인상을 채득하여 석고 모형을 제작하고 PFG, LAVA 3-unit bridge를 10개씩 제작하였다. 제작된 bridge를 레진 모형에 접착하고 실체 현미경(Stereoscopic microscope, Nikon DS-Fi 1, Nikon, Japan)을 사용하여 각 치아당 4점에서 변연 적합도를 측정하였다 (×75). 측정된 결과는 independent t-test로 통계 분석하였다 (α= 0.05). 결과: 각 군에서 변연 적합도의 평균과 표준편차는 PFG bridge 중절치에서는 97.1 ± 18.7 ㎛, 견치에서는 76.6 ± 21.8 ㎛, LAVA bridge 중절치에서는 90.4 ± 26.7 ㎛, 견치에서는 110.2 ± 30.2 ㎛ 이었다. PFG 3-unit bridge와LAVA 3-unit bridge에서 중절치에서는 통계적 유의성이 없었고, 견치에서는LAVA의 변연 간격이 큰 것으로 나타났다 (P<.05). 결론: PFG 3-unit bridge와 LAVA 3-unit bridge 두 군 모두 임상적으로 받아들여질 만한 변연 적합도를 보였다.
Abstract
Purpose: The purpose of this study was to assess the marginal fit of three-unit bridges produced using LAVA CAD/CAM (computer-aided design/computer-aided manufacturing) system and conventional PFG in vitro. Materials and methods: #11, 13 resin teeth were prepared on dentiform, then duplicated. Twenty resin models were fabricated, ten for PFG 3-unit bridges and ten for LAVA 3-unit bridges. Each bridge was cemented on the resin model. Marginal discrepancy was measured with stereoscopic microscope (Nikon DS-Fi 1, Nikon, Japan) at a magnification of ×75. Independent t-test was done for the statistical analysis. Results: The mean marginal discrepancy values and standard deviations of the PFG bridges was 97.1 ± 18.7 ㎛ for incisors, 76.6 ± 21.8 ㎛ for canines; that of the LAVA bridges was 90.4 ± 26.7 ㎛ for incisor, 110.2 ± 30.2 ㎛ for canines. The mean marginal discrepancy between PFG and LAVA for incisor did not show significant difference (P>.05). But for canine, the mean marginal discrepancy of PFG bridges was smaller than that of LAVA bridges (P<.05). Conclusion: The LAVA CAD/CAM 3-unit bridges and the PFG 3-unit bridges showed clinically acceptable marginal discrepancy.
참고문헌 (28)
- Reich S, "Clinical fit of allceramic three-unit fixed partial dentures, generated with three different CAD", CAM systems, 2005, pp.113, 174~179
- Probster L, "Four year clinical study of glass-infiltrated, sintered alumina crowns", J Oral Rehabil, 23, pp.147~151 (1996)
- Ode′n A, "Five-year clinical evaluation of Procera AllCeram crowns", J Prosthet Dent, 80, pp.450~456 (1998)
- Odman P, "Procera AllCeram crowns followed for 5 to 10.5 years: a prospective clinical study", Int J Prosthodont, 14, pp.504~509 (2001)
- Sailer I, "Five-year clinical results of zirconia frameworks for posterior fixed partial dentures", Int J Prosthodont, 20, pp.383~388 (2007)
- Tinschert J, "Fracture resistance of lithium disilicate-, alumina-, and zirconia-based three-unit fixed partial dentures: a laboratory study", Int J Prosthodont, 14, pp.231~238 (2001)
- Filser F, "Reliability and strength of all-ceramic dental restorations fabricated by direct ceramic machining (DCM)", Int J Comput Dent, 4, pp.89~106 (2001)
- Raigrodski AJ, "The efficacy of posterior three-unit zirconium- oxide-based ceramic fixed partial dental prostheses: a prospective clinical pilot study", J Prosthet Dent, 96, pp.237~244 (2006)
- Piwowarczyk A, "A clinical report and overview of scientific studies and clinical procedures conducted on the 3M ESPE Lava All-Ceramic System", J Prosthodont, 14, pp.39~45 (2005)
- Suttor D, "LAVA-- the system for all-ceramic ZrO2 crown and bridge frameworks", Int J Comput Dent, 4, pp.195~206 (2001)
- Goldman M, "Microleakage-full crowns and the dental pulp", J Endod, 18, pp.473~475 (1992)
- Valderhaug J, "Periodontal conditions in patients 5 years following insertion of fixed prostheses. Pocket depth and loss of attachment", J Oral Rehabil, 3, pp.237~243 (1976)
- Valderhaug J, "Oral hygiene in a group of supervised patients with fixed prostheses", J Periodontol, 48, pp.221~224 (1977)
- Lang NP, "Clinical and microbiological effects of subgingival restorations with overhanging or clinically perfect margins", J Clin Periodontol, 10, pp.563~578 (1983)
- Felton DA, "Effect of in vivo crown margin discrepancies on periodontal health", J Prosthet Dent, 65, pp.357~364 (1991)
- Jacobs MS, "An investigation of dental luting cement solubility as a function of the marginal gap", J Prosthet Dent, 65, pp.436~442 (1991)
- "Reports of councils and bureau: revised Americal National Standard Institute American Dental Association (ANSI-ADA) specification no.8 for zinc-phosphate cement", J Am Dent Assoc, 96, pp.121~ (1978)
- Ostlund LE, "Cavity design and mathematics: their effect on gaps at the margins of cast restorations", Oper Dent, 10, pp.122~137 (1985)
- Sulaiman F, "A comparison of the marginal fit of In-Ceram, IPS Empress, and Procera crowns", Int J Prosthodont, 10, pp.478~484 (1997)
- McLean JW, "The estimation of cement film thickness by an in vivo technique", Br Dent J, 131, pp.107~111 (1971)
- Gulker I, "Margins", N Y State Dent J, 51, pp.213~217 (1985)
- Moldovan O, "Internal and external fit of CAM-made zirconia bridge frameworks-a pilot study", Dtsch Zahnarztl Z, 61, pp.38~42 (2006)
- Bindl A, "Fit of all-ceramic posterior fixed partial denture frameworks in vitro", Int J Periodontics Restorative Dent, 27, pp.567~575 (2007)
- Romeo E, "Marginal adaptation of full-coverage CAD", CAM restorations: in vitro study using a non-destructive method, 2009, pp.58, 61~72
- Kohorst P, "Marginal accuracy of four-unit zirconia fixed dental prostheses fabricated using different computer-aided design", computer-aided manufacturing systems, 2009, pp.117, 319~325
- Cavalcanti AN, "Y-TZP ceramics: key concepts for clinical application", Oper Dent, 34, pp.344~351 (2009)
- Mizrahi B, "The anterior all-ceramic crown: a rationale for the choice of ceramic and cement", Br Dent J, 205, pp.251~255 (2008)
- Kunii J, "Effect of sintering on the marginal and internal fit of CAD", CAM-fabricated zirconia frameworks, 2007, pp.26, 820~826