Objectives Orthodontic bracket removal from a porcelain crown can roughen the surface and lead to plaque accumulation, discoloration, and esthetic problems. Porcelain polishing after debonding is one strategy to decrease such consequences. This study aimed to compare the efficacy of two polishing systems (Sof-Lex discs and Meisinger polishing system) for correction of surface roughness and discoloration of porcelain after orthodontic bracket debonding. Materials and Methods Twenty porcelain blocks were evaluated in two groups of 10. First, the baseline surface roughness and color parameters of the samples were measured using atomic force microscopy and spectrophotometry, respectively. After bracket bonding, a fine cutter was used for bracket debonding, and resin remnants were removed by a tungsten carbide bur and low-speed handpiece. Samples were then polished using Sof-Lex discs (group 1) and Meisinger porcelain polishing kit (group 2). Surface roughness and color parameters were measured again. Data were analyzed using SPSS 18 through the Shapiro–Wilk test, Student’s t-test, and paired t-test at 5% level of significance. Results Porcelain color change (ΔE) was significantly greater in the Meisinger system than Sof-Lex (P < 0.001). The Rq, Ra, and Rt surface roughness parameters significantly increased in both the groups after the intervention compared to baseline (P < 0.05), but the two groups were not significantly different in this respect after the polishing procedures (P > 0.05). Conclusion The porcelain color after polishing with Sof-Lex discs was closer to the baseline. Furthermore, the two systems were not significantly different regarding surface roughness. However, Sof-Lex discs may be recommended due to lower cost.
Introduction: Venous varices are vascular lesions caused by vasodilatation. These oral cavity lesions are usually seen as papules or dark blue nodules on the tongue’s ventral surface buccal and retro-commissural mucosae. They are generally asymptomatic but may cause problems such as bleeding on trauma or lack of esthetics. Although many treatment modalities exist for these lesions, the laser is a novel and less invasive method. It secures patient satisfaction more than other methods due to the lack of bleeding and pain. Unlike previous laser therapy methods used for cutting and excision of small vascular lesions, in this lesson, the coagulation properties of laser are employed to eliminate the lesion. Case Presentation: To illustrate, a 70-year-old female person was admitted to the dental clinic of the Semnan University of Medical Sciences, Iran, for a dental examination. She has no systemic problems. During the extra-oral examination, the lesion was visualized on the right side of her lower lip, and the initial diagnosis of a venous lake was made. The lesion was asymptomatic and had been present for several years. Likewise, after obtaining informed consent, treatment with a 940-diode laser was performed. Immediately after the irradiation, the lesion disappeared, and after four weeks, the lip’s texture was completely normal. Conclusions: Exploiting the coagulation properties of the laser to eliminate venous lakes is advantageous over other methods because of the lack of bleeding or pain. Furthermore, this method has a shorter healing time.
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