評估玻璃陶瓷的組成與厚度對其光學性質的影響

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Title:	評估玻璃陶瓷的組成與厚度對其光學性質的影響 Evaluate the influence of glass ceramic composition and thickness on its optical properties
Authors:	葉韋杰 Wei-Chieh Yeh
Contributors:	中山醫學大學:口腔科學研究所;湯正明(Cheng-Ming Tang)
Keywords:	玻璃陶瓷;牙科CAD/CAM;前牙美學;顏色準確度 Glass ceramics;dental CAD/CAM;anterior teeth aesthetics;color accuracy
Date:	2021-07-01
Issue Date:	2022-07-21T02:08:13Z (UTC)
Abstract:	市面上眾多組成的牙科用CAD/CAM用玻璃陶瓷，牙科CAD/CAM操作人員對於材料的選擇是憑藉著經驗，前牙選擇透明度較高的材質，並且厚度較薄。而後牙則是選擇透明度較低的材質，因機械強度的需要，成品厚度較高。陶瓷的顏色亦會影響到牙科美學的表現，文獻上多以B1色階，主要適用於歐美地區人類的牙齒。亞洲地區主要是以A3色階為主。因此本研究藉由光度計測量不同廠牌之牙科用CAD/CAM用玻璃陶瓷，並且控制試片厚度，比較組成與厚度對光學性質之影響，並且篩選出適合臨床操作的玻璃陶瓷選擇。本實驗使用市售六種牙科用CAD/CAM用玻璃陶瓷，分別為：IPS Empress(Ivoclar Vivadent AG)、IPS E.max CAD(Ivoclar Vivadent AG)、VITA MarkII(VITA Zahnfabrik)、VITA Suprinity(VITA Zahnfabrik)、GC Cerasmart(GC USA)與Celtra Duo(Dentsply Sirona)，瓷塊顏色為A3與B1色階。慢速切割成厚度為0.5 mm與1.0 mm兩種尺寸，試片表面經拋光處理後，再使用VITA光度計(VITA Easyshade? V)對試片進行光學性質分析，藉由取得之L, a b數值，代入公式進行不同光學性質的計算。得到了半透明度最佳的材料，可以適用於前牙。透明度最佳的材料，同樣用可以適用於前牙。得到了蛋白光高的材料可以作為一個美學的參考。了解不同材料的表面維氏硬度，可以適用於後牙。並且融合了在齒色背景與黑色背景和白色背景上所呈現出的顏色準確值，得到適合在臨床不同情形下適合的材料。臨床上前牙美學需求高，硬度需求低，而後牙美學需求低，但硬度需求高，不管是前後牙皆需要優良的顏色準確度。本研究可提供臨床對於牙科用CAD/CAM用玻璃陶瓷使用上進行選擇。 Based on experience, the anterior teeth choose a material with higher transparency and a thinner thickness, For the posterior teeth, a material with lower transparency is selected, and the thickness of the finished product is higher due to the need of mechanical strength. The color of ceramics will also affect the performance of dental aesthetics. The literature mostly uses B1 color, which is mainly applied to human teeth in Europe and USA. The Asian region is mainly based on A3 color. Therefore, this study used a photometer to measure glass ceramics of different brands and thickness. Using commercially available glass ceramics for dental use, including IPS Empress and IPS E.max CAD (Ivoclar Vivadent AG), VITA MarkII and Suprinity (VITA Zahnfabrik), GC Cerasmart (GC USA) and Celtra Duo (Dentsply Sirona). Cutting into two sizes with thickness of 0.5 mm and 1.0 mm, after polishing the surface of the specimen, then use the VITA photometer to analyze the optical properties of specimen, use the obtained L, a* b* values and substitute them into the In the formulas of various optical properties. The material with the best translucency and translucency is obtained, which can be applied to anterior teeth. The material with high protein light can be used as an aesthetic reference. Understanding the surface Vickers hardness of different materials can be applied to posterior teeth. In addition, the accurate values of the colors presented on the tooth-colored background, black background and white background are combined to obtain materials suitable for different clinical situations. The anterior teeth have high aesthetic requirements and low hardness requirements, while the posterior teeth have low aesthetic requirements but high hardness requirements. This study can provide clinical practitioners with options for the use of glass ceramics.
URI:	https://etds.csmu.edu.tw/ETDS/Home/Detail/U0003-2807202123540000 https://hdl.handle.net/11296/av57rn https://dx.doi.org/10.6834/csmu202100179 https://ir.csmu.edu.tw:8080/handle/310902500/22500
Appears in Collections:	[口腔科學研究所] 博碩士論文

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