Rani Varsha, Mittal Sanjeev, Sukhija Urvashi
Department of Prosthodontics and Crown and Bridge, Maharishi Markadeshwar College of Dental Science and Research, Mullana, Ambala, Haryana, India.
Contemp Clin Dent. 2021 Apr-Jun;12(2):164-168. doi: 10.4103/ccd.ccd_86_20. Epub 2021 Jun 14.
The aim of this study was to evaluate the effect of glazing, reglazing, and chairside polishing on the surface roughness of dental porcelain.
A total of 50 discs of feldspathic porcelain were fabricated using a metal mold of dimension 10 mm × 2 mm. Based on the surface treatment, the samples were divided into five groups. Group A - Glazed (control), Group B - Abraded and reglazed, Group C - Abraded and polished with porcelain adjustment kit (Shofu Dental Corp. PN 0301 Classic Plastic HP Kit, Shofu Inc., Kyoto, Japan), Group D - Abraded and polished with diamond polishing paste (Shofu Dental Corp. PN 0558 DirectDia, Shofu Inc., Kyoto, Japan), Group E-Abraded and polished with the combination of porcelain adjustment kit followed by diamond polishing paste. The surface roughness (Ra) values (μm) were evaluated by a profilometer (Mitutoyo Surftest SJ-310, Tokyo, Japan). The data obtained were statistically analyzed using one-way ANOVA and Tukey's test.
The mean surface roughness (Ra) of Groups A, B, C, D, and E was 0.567 ± 0.078 μm, 0.433 ± 0.059 μm, 0.882 ± 0.126 μm, 2.361 ± 0.195 μm, and 0.438 ± 0.043 μm, respectively. The samples of Group D (Polished with polishing paste alone) had the highest surface roughness (Ra value). Whereas the samples of Group B and E had similar surface roughness (Ra) value. Differences between Groups A, B, and E were statistically insignificant ( > 0.05).
After adjustment of ceramic restorations in dental clinics, diamond polishing paste, when used after porcelain adjustment kit, could provide the marked finish equal to glazed or reglazed surface.
本研究旨在评估上釉、重新上釉和椅旁抛光对牙科陶瓷表面粗糙度的影响。
使用尺寸为10毫米×2毫米的金属模具制作了50个长石质陶瓷圆盘。根据表面处理方式，将样本分为五组。A组 - 上釉（对照组），B组 - 磨损后重新上釉，C组 - 用陶瓷调整套件（日本京都松风株式会社PN 0301经典塑料HP套件）磨损并抛光，D组 - 用金刚石抛光膏（日本京都松风株式会社PN 0558 DirectDia）磨损并抛光，E组 - 先用陶瓷调整套件然后用金刚石抛光膏组合进行磨损并抛光。通过轮廓仪（日本东京三丰表面粗糙度仪SJ - 310）评估表面粗糙度（Ra）值（μm）。使用单因素方差分析和Tukey检验对获得的数据进行统计学分析。
A、B、C、D和E组的平均表面粗糙度（Ra）分别为0.567±0.078μm、0.433±0.059μm、0.882±0.126μm、2.361±0.195μm和0.438±0.043μm。D组（仅用抛光膏抛光）的样本表面粗糙度（Ra值）最高。而B组和E组的样本表面粗糙度（Ra）值相似。A、B和E组之间的差异无统计学意义（>0.05）。
在牙科诊所对陶瓷修复体进行调整后，在使用陶瓷调整套件后再使用金刚石抛光膏，可以提供与上釉或重新上釉表面相当的显著光洁度。
