Comparative analysis of transmittance for different types of commercially available zirconia and lithium disilicate materials
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PURPOSE. Translucency and colour stability are two most important aspects for an aesthetic dental restoration. Glass ceramic restorations are popular amongst clinicians because of their superior aesthetic properties. In the last decade, zirconia has generated tremendous interest due to its favorable mechanical and biological properties. However, zirconia lacks the translucency that lithium disilicate materials possess and therefore has limitations in its use, especially in esthetically demanding situations. There has been a great thrust in research towards developing translucent zirconia materials for dental restorations. The objective of the study was to evaluate and compare the transmittance of a translucent variant of zirconia to lithium disilicate. MATERIALS AND METHODS. Two commercially available zirconia materials (conventional and high translucency) and 2 lithium disilicate materials (conventional and high translucency) with standardized dimensions were fabricated. Transmittance values were measured for all samples followed by a microstructural analysis using a finite element scanning electron microscope. One way analysis of variance combined with a Tukey-post hoc test was used to analyze the data obtained (P=.05). RESULTS. High translucency lithium disilicate showed highest transmittance of all materials studied, followed by conventional lithium disilicate, high translucency zirconia and conventional zirconia. The difference between all groups of materials was statistically significant. The transmittance of the different materials correlated to their microstructure analysis. CONCLUSION. Despite manufacturers’ efforts to make zirconia significantly more translucent, the transmittance values of these materials still do not match conventional lithium disilicate. More research is required on zirconia towards making the material more translucent for its potential use as esthetic monolithic restoration.
Abstract
PURPOSE. Translucency and colour stability are two most important aspects for an aesthetic dental restoration. Glass ceramic restorations are popular amongst clinicians because of their superior aesthetic properties. In the last decade, zirconia has generated tremendous interest due to its favorable mechanical and biological properties. However, zirconia lacks the translucency that lithium disilicate materials possess and therefore has limitations in its use, especially in esthetically demanding situations. There has been a great thrust in research towards developing translucent zirconia materials for dental restorations. The objective of the study was to evaluate and compare the transmittance of a translucent variant of zirconia to lithium disilicate. MATERIALS AND METHODS. Two commercially available zirconia materials (conventional and high translucency) and 2 lithium disilicate materials (conventional and high translucency) with standardized dimensions were fabricated. Transmittance values were measured for all samples followed by a microstructural analysis using a finite element scanning electron microscope. One way analysis of variance combined with a Tukey-post hoc test was used to analyze the data obtained (P=.05). RESULTS. High translucency lithium disilicate showed highest transmittance of all materials studied, followed by conventional lithium disilicate, high translucency zirconia and conventional zirconia. The difference between all groups of materials was statistically significant. The transmittance of the different materials correlated to their microstructure analysis. CONCLUSION. Despite manufacturers’ efforts to make zirconia significantly more translucent, the transmittance values of these materials still do not match conventional lithium disilicate. More research is required on zirconia towards making the material more translucent for its potential use as esthetic monolithic restoration.
참고문헌 (24)
- Kelly JR., "Ceramic materials in dentistry : historical evolution and current practice", Aust Dent J, 56, pp.84~96 (2011)
- Durán P., "Theoretically dense and nanostructured ceramics by pressureless sintering of nanosized Y-TZP powders", Mater Sci Eng A, 232, pp.168~176 (1997)
- Chen YM., "Translucency and biaxial flexural strength of four ceramic core materials", Dent Mater, 24, pp.1506~1511 (2008)
- 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)
- Mizrahi B., "The anterior all-ceramic crown : a rationale for the choice of ceramic and cement", Br Dent J, 205, pp.251~255 (2008)
- Raigrodski AJ., "Contemporary materials and technologies for all-ceramic fixed partial dentures : a review of the literature", J Prosthet Dent, 92, pp.557~562 (2004)
- Conrad HJ., "Current ceramic materials and systems with clinical recommendations : a systematic review", J Prosthet Dent, 98, pp.389~404 (2007)
- Dias MC., "UV-Vis spectrophotometric analysis and light irradiance through hot-pressed and hot-pressed-veneered glass ceramics", Braz Dent J, 19, pp.197~203 (2008)
- Tsukuma K., "Transparent 8 mol% Y2 O3 –ZrO2(8Y)Ceramics", J Am Ceram Soc, 91, pp.813~818 (2008)
- Chen YM., "Translucency and biaxial flexural strength of four ceramic core materials", Dent Mater, 24, pp.1506~1511 (2008)
- Sailer I., "Prospective clinical study of zirconia posterior fixed partial dentures : 3-year follow-up", Quintessence Int, 37, pp.685~693 (2006)
- Rosenstiel SF., "Contemporary Fixed Prosthodontics", pp.262~643 (2006), Mosby
- Yu B., "Measurement of translucency of tooth enamel and dentin", Acta Odontol Scand, 67, pp.57~64 (2009)
- Heffernan MJ., "Relative translucency of six all-ceramic systems. Part I : core materials", J Prosthet Dent, 88, pp.4~9 (2002)
- Heffernan MJ., "Relative translucency of six all-ceramic systems. Part II : core and veneer materials", J Prosthet Dent, 88, pp.10~15 (2002)
- Kelly JR., "Failure of all-ceramic fixed partial dentures in vitro and in vivo : analysis and modeling", J Dent Res, 74, pp.1253~1258 (1995)
- Brodbelt RH., "Translucency of dental porcelains", J Dent Res, 59, pp.70~75 (1980)
- 김미진, "Effects of the sintering conditions of dental zirconia ceramics on the grain size and translucency", The Journal of Advanced of Prosthodontics, 5(2), pp.161~166 (2013), 대한치과보철학회[DOI]
- Antonson SA., "Contrast ratio of veneering and core ceramics as a function of thickness", Int J Prosthodont, 14, pp.316~320 (2001)
- Zhang Y., "Influence of powder", liquid mixing ratio on porosity and translucency of dental porcelains, 2004, pp.91, 128~135
- Alaniz JE., "Optical properties of transparent nanocrystalline yttria stabilized zirconia", Opt Mater, 32, pp.62~68 (2009)
- Succaria F., "Prescribing a dental ceramic material : Zirconia vs lithium-disilicate", Saudi Dent J, 23, pp.165~166 (2011)
- Vichi A., "Color related to ceramic and zirconia restorations : a review", Dent Mater, 27, pp.97~108 (2011)
- Johnson LD., "Microwave and plasma sintering of ceramics", Ceram Int, 17, pp.295~300 (1991)