다양한 CAD/CAM 방식으로 제작한 금속하부구조물 간의 변연 및 내면 적합도 비교 연구
Comparative evaluation of marginal and internal fit of metal copings fabricated by various CAD/CAM methods
2
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
목적: 본 연구에서는 CAD/CAM 기술로 제작한 4가지 금속하부구조물의 변연 및 내면 적합도를 비교하여 정확도 및 임상적 효용성을 알아보고자 한다. 재료 및 방법: 상악 중절치 레진모형치아를 삭제한 뒤 복제하여 Ni-Cr 합금 표준 모형을 제작하였다. 이를 공초점 현미경방식의 구강 스캐너를 이용해 12개의 STL 파일을 얻었다. CAD 프로그램 상에서 50 μm의 시멘트 공간을 부여한 두께 0.5 mm의 금속하부구조물을 디자인하였다. Co-Cr 금속하부 구조물은 다음 4가지 방법으로 제작하였다: Wax pattern milling & Casting (WM), Resin pattern 3D Printing & casting (RP), Milling & Sintering (MS), Selective laser melting (SLM). 변연 및 내면 적합도를 측정하기 위해 실리콘 복제법을 이용하였다. 측정한 결과값은 SPSS 통계 프로그램을 이용하여 일원배치분산분석(one-way ANOVA)으로 통계처리하고, 사후검정으로 Scheffe test를 시행하였으며, 5% 유의수준으로 평가하였다(α = .05). 결과: 변연 적합도는 WM군(27.66 ± 9.85 μm)과 MS군(28.88 ± 10.13 μm)이 RP군(38.09 ± 11.14 μm)에 비해 통계적으로 유의하게 작았다. 치경부 적합도는 MS군이 RP군에 비해 통계적으로 유의하게 작았다. 축면 적합도는 WM군과 MS군이 RP군과 SLM군 보다 통계적으로 유의하게 작았다. 절단면 적합도는 RP군이 통계적으로 유의하게 작았다. 결론: Wax pattern milling & Casting, Milling & Sintering법으로 제작한 Co-Cr coping의 변연과 축면에서의 적합도가 더 우수하였다. 모든 군의 Co-Cr coping의 변연, 치경부, 축면 적합도는 임상적으로 허용할만한 범위 안에 있었다.
Abstract
Purpose: The purpose of the present study was to compare the accuracy of four different metal copings fabricated by CAD/CAM technology and to evaluate clinical effectiveness. Materials and methods: Composite resin tooth of the maxillary central incisor was prepared for a metal ceramic crown and duplicated metal die was fabricated. Then scan the metal die for 12 times to obtain STL files using a confocal microscopy type oral scanner. Metal copings with a thickness of 0.5 mm and a cement space of 50 μm were designed on a CAD program. The Co-Cr metal copings were fabricated by the following four methods: Wax pattern milling & Casting (WM), Resin pattern 3D Printing & casting (RP), Milling & Sintering (MS), Selective laser melting (SLM). Silicone replica technique was used to measure marginal and internal discrepancies. The data was statistically analyzed with One-way analysis of variance and appropriate post hoc test (Scheffe test) (α=.05). Results: Mean marginal discrepancy was significantly smaller in the Group WM (27.66 ± 9.85 μm) and Group MS (28.88 ± 10.13 μm) than in the Group RP (38.09 ± 11.14 μm). Mean cervical discrepancy was significantly smaller in the Group MS than in the Group RP. Mean axial discrepancy was significantly smaller in the Group WM and Group MS then in the Group RP and Group SLM. Mean incisal discrepancies was significantly smaller in the Group RP than in all other groups. Conclusion: The marginal and axial discrepancies of the Co-Cr coping fabricated by the Wax pattern milling and Milling/Sintering method were better than those of the other groups. The marginal, cervical and axial fit of Co-Cr copings in all groups are within a clinically acceptable range.
참고문헌 (34)
- Johnston JF, "Porcelain veneers bonded to gold castings-A progress report", J Prosthet Dent, 8, pp.120~122 (1958)
- Kocaağaoğlu H, "In vitro evaluation of marginal, axial, and occlusal discrepancies in metal ceramic restorations produced with new technologies", J Prosthet Dent, 116, pp.368~374 (2016)
- Kane LM, "Marginal and internal adaptation of milled cobalt-chromium copings", J Prosthet Dent, 114, pp.680~685 (2015)
- Kim EH, "A microcomputed tomography evaluation of the marginal fit of cobalt-chromium alloy copings fabricated by new manufacturing techniques and alloy systems", J Prosthet Dent, 117, pp.393~399 (2017)
- Bidra AS, "Computer-aided technology for fabricating complete dentures : systematic review of historical background, current status, and future perspectives", J Prosthet Dent, 109, pp.361~366 (2013)
- Poggio C, "Influence of different luting protocols on shear bond strength of computer aided design", computer aided manufacturing resin nanoceramic material to dentin, 2016, pp.13, 91~97
- Christensen GJ, "The state of fixed prosthodontic impressions : room for improvement", J Am Dent Assoc, 136, pp.343~346 (2005)
- Reich S, "Clinical fit of allceramic three-unit fixed partial dentures, generated with three different CAD", CAM systems, 2005, pp.113, 174~179
- Chan C, "Plaque retention on teeth restored with full-ceramic crowns : a comparative study", J Prosthet Dent, 56, pp.666~671 (1986)
- Baig MR, "Evaluation of the marginal fit of a zirconia ceramic computer-aided machined(CAM)crown system", J Prosthet Dent, 104, pp.216~227 (2010)
- Goldman M, "Microleakage-full crowns and the dental pulp", J Endod, 18, pp.473~475 (1992)
- DeLong R, "Factors influencing optical 3D scanning of vinyl polysiloxane impression materials", J Prosthodont, 10, pp.78~85 (2001)
- Seelbach P, "Accuracy of digital and conventional impression techniques and workflow", Clin Oral Investig, 17, pp.1759~1764 (2013)
- 이현호, "고정성 보철물의 적합도에 대한 실험적 평가방법", 구강회복응용과학지, 33(2), pp.63~70 (2017), 대한턱관절교합학회[DOI]
- Laurent M, "Clinical evaluation of the marginal fit of cast crowns-validation of the silicone replica method", J Oral Rehabil, 35, pp.116~122 (2008)
- Wolfart S, "Clinical evaluation of marginal fit of a new experimental all-ceramic system before and after cementation", Int J Prosthodont, 16, pp.587~592 (2003)
- 송태진, "Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD", CAM systems, 2013, pp.5(3), 219~225[DOI]
- Cho L, "Marginal accuracy and fracture strength of ceromer", fiber-reinforced composite crowns : effect of variations in preparation design, 2002, pp.88, 388~395
- Kale E, "Effect of cement space on the marginal fit of CAD-CAM-fabricated monolithic zirconia crowns", J Prosthet Dent, 116, pp.890~895 (2016)
- Holmes JR, "Considerations in measurement of marginal fit", J Prosthet Dent, 62, pp.405~408 (1989)
- Christensen GJ, "Marginal fit of gold inlay castings", J Prosthet Dent, 16, pp.297~305 (1966)
- Hung SH, "Marginal fit of porcelain-fused-to-metal and two types of ceramic crown", J Prosthet Dent, 63, pp.26~31 (1990)
- Kashani HG, "The effects of bevel angulation on marginal integrity", J Am Dent Assoc, 103, pp.882~885 (1981)
- McLean JW, "Polycarboxylate cements. Five years’ experience in general practice", Br Dent J, 132, pp.9~15 (1972)
- Jorgensen KD, "The relationship between the film thickness of zinc phosphate cement and the retention of veneer crowns", Acta Odontol Scand, 26, pp.169~175 (1968)
- Passon C, "The effect of multiple layers of die-spacer on crown retention", Oper Dent, 17, pp.42~49 (1992)
- Grey NJ, "In vitro comparison of conventional crowns and a new all-ceramic system", J Dent, 21, pp.47~51 (1993)
- Iwai T, "Influence of convergence angle and cement space on adaptation of zirconium dioxide ceramic copings", Acta Odontol Scand, 66, pp.214~218 (2008)
- Vojdani M, "Comparison the marginal and internal fit of metal copings cast from wax patterns fabricated by CAD", CAM and conventional wax up techniques, 2013, pp.14, 118~129
- Keul C, "Fit of 4-unit FDPs made of zirconia and CoCr-alloy after chairside and labside digitalization-a laboratory study", Dent Mater, 30, pp.400~407 (2014)
- Svanborg P, "Marginal and internal fit of cobalt-chromium fixed dental prostheses generated from digital and conventional impressions", Int J Dent, 2014, pp.534382~ (2014)
- 박지만, "Comparative analysis on reproducibility among 5 intraoral scanners: sectional analysis according to restoration type and preparation outline form", The Journal of Advanced of Prosthodontics, 8(5), pp.354~362 (2016), 대한치과보철학회[DOI]
- Imburgia M, "Accuracy of four intraoral scanners in oral implantology : a comparative in vitro study", BMC Oral Health, 17, pp.92~ (2017)
- Osman RB, "Build angle: Does it influence the accuracy of 3D-printed dental restorations using digital light-processing technology?", Int J Prosthodont, 30, pp.182~188 (2017)