Precision of the milled full-arch framework fabricated using presintered soft alloy: A pilot study
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PURPOSE. This study aimed to evaluate the marginal discrepancy of full-arch frameworks in implant-supportedprostheses fabricated using pre-sintered soft alloy (PSA). MATERIALS AND METHODS. Full-arch metal frameworks were fabricated on the edentulous implant model using casting alloy (CA), fully-sintered hard alloy (FHA), and PSA (n = 4 in each group). To evaluate the misfit of the framework to the abutments, the absolute marginal discrepancy (AMD) values of the frameworks were measured in cross-sectional images that had been drawn as part of the triple-scan protocol. The AMD values were compared among the tested alloy groups using the Kruskal-Wallis test, with a post hoc Mann-Whitney U test (α=.05). RESULTS. The FHA and PSA groups showed lower marginal discrepancies than the CA group (P<.001). However, the FHA group did not differ significantly from the PSA group. CONCLUSION. Soft alloy milling is comparable to hard alloy milling, and it is more precise than casting in terms of the marginal fit of implant-supported, full-arch prostheses.
Abstract
PURPOSE. This study aimed to evaluate the marginal discrepancy of full-arch frameworks in implant-supportedprostheses fabricated using pre-sintered soft alloy (PSA). MATERIALS AND METHODS. Full-arch metal frameworks were fabricated on the edentulous implant model using casting alloy (CA), fully-sintered hard alloy (FHA), and PSA (n = 4 in each group). To evaluate the misfit of the framework to the abutments, the absolute marginal discrepancy (AMD) values of the frameworks were measured in cross-sectional images that had been drawn as part of the triple-scan protocol. The AMD values were compared among the tested alloy groups using the Kruskal-Wallis test, with a post hoc Mann-Whitney U test (α=.05). RESULTS. The FHA and PSA groups showed lower marginal discrepancies than the CA group (P<.001). However, the FHA group did not differ significantly from the PSA group. CONCLUSION. Soft alloy milling is comparable to hard alloy milling, and it is more precise than casting in terms of the marginal fit of implant-supported, full-arch prostheses.
참고문헌 (27)
- Holmes JR, "Considerations in measurement of marginal fit", J Prosthet Dent, 62, pp.405~408 (1989)[DOI]
- Henry PJ, "An alternative method for the production of accurate casts and occlusal records in osseointegrated implant rehabilitation", J Prosthet Dent, 58, pp.694~697 (1987)[DOI]
- Aparicio C, "A new method for achieving passive fit of an interim restoration supported by Branemark implants: a technical note", Int J Oral Maxillofac Implants, 10, pp.614~618 (1995)
- Contrepois M, "Marginal adaptation of ceramic crowns: a systematic review", J Prosthet Dent, 110, pp.447~454 (2013)[DOI]
- Pimenta MA, "Evaluation of marginal and internal fit of ceramic and metallic crown copings using x-ray microtomography (micro-CT) technology", J Prosthet Dent, 114, pp.223~228 (2015)[DOI]
- Ziebert GJ, "Accuracy of one-piece castings, preceramic and postceramic soldering", J Prosthet Dent, 55, pp.312~317 (1986)[DOI]
- Sarfati E, "Comparative accuracy of fixed partial dentures made as one-piece castings or joined by solder", Int J Prosthodont, 5, pp.377~383 (1992)
- Sven Rinke, "Implant-supported overdentures with different bar designs: A retrospective evaluation after 5-19 years of clinical function", The Journal of Advanced of Prosthodontics, 7(4), pp.338~342 (2015), 대한치과보철학회[DOI]
- Eisenmann E, "Improving the fit of implant-supported superstructures using the spark erosion technique", Int J Oral Maxillofac Implants, 19, pp.810~818 (2004)
- Ortorp A, "Comparisons of precision of fit between cast and CNC-milled titanium implant frameworks for the edentulous mandible", Int J Prosthodont, 16, pp.194~200 (2003)
- Paniz G, "The precision of fit of cast and milled full-arch implant-supported restorations", Int J Oral Maxillofac Implants, 28, pp.687~693 (2013)[DOI]
- Rubén Agustín-Panadero, "Implant-supported overdenture manufactured using CAD", CAM techniques to achieve horizontal path insertion between the primary and secondary structure: A clinical case report, 2015, pp.7(3), 264~270[DOI]
- Lee DH, "Shear bond strength of porcelain to a new millable alloy and a conventional castable alloy", J Prosthet Dent, 113, pp.329~335 (2015)[DOI]
- Park JK, "Evaluation of the fit of metal ceramic restorations fabricated with a pre-sintered soft alloy", J Prosthet Dent, 116, pp.909~915 (2016)[DOI]
- 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)[DOI]
- Kelvin Khng KY, "In vitro evaluation of the marginal integrity of CAD", CAM interim crowns, 2016, pp.115, 617~623
- Shamseddine L, "Fit of pressed crowns fabricated from two CAD-CAM wax pattern process plans: A comparative in vitro study", J Prosthet Dent, 118, pp.49~54 (2017)[DOI]
- Alfaro DP, "Assessment of the internal fit of lithium disilicate crowns using micro-CT", J Prosthodont, 24, pp.381~386 (2015)[DOI]
- Nakamura T, "Marginal and internal fit of Cerec 3 CAD", CAM all-ceramic crowns, 2003, pp.16, 244~248
- Lee KB, "Marginal and internal fit of all-ceramic crowns fabricated with two different CAD", CAM systems, 2008, pp.27, 422~426
- De Santis R, "Reverse engineering of mandible and prosthetic framework: Effect of titanium implants in conjunction with titanium milled full arch bridge prostheses on the biomechanics of the mandible", J Biomech, 47, pp.3825~3829 (2014)[DOI]
- Bae SY, "Three-dimensional analysis of marginal and internal fit of copings fabricated with polyetherketoneketone (PEKK) and zirconia", J Prosthodont Res, 61, pp.106~112 (2017)[DOI]
- Lee DH, "Digital approach to assessing the 3-dimensional misfit of fixed dental prostheses", J Prosthet Dent, 116, pp.836~839 (2016)[DOI]
- Holst S, "A new triple-scan protocol for 3D fit assessment of dental restorations", Quintessence Int, 42, pp.651~657 (2011)
- Real-Voltas F, "Comparison of the marginal fit of cobalt-chromium metal-ceramic crowns fabricated by CAD", CAM techniques and conventional methods at three production stages, 2017, pp.30, 304~305
- Zhou Ying, "Role of span length in the adaptation of implant-supported cobalt chromium frameworks fabricated by three techniques", The Journal of Advanced of Prosthodontics, 9(2), pp.124~129 (2017), 대한치과보철학회[DOI]
- Park JM, "Digital technique for in vivo assessment of internal and marginal fit of fixed dental prostheses", J Prosthet Dent, 118, pp.452~454 (2017)[DOI]
