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The sample of this study included (28% males and 72% females) in Saudi Arabia. Quantitative design was the best design for the current research by collecting data through an online questionnaire. Seventeen closed ended questionnaire was constructed in Arabic language and also, it was divided into two sections. This study involved a survey of 573 person (160 Males and 413 Females) a random sample was chosen for its relevance to the nature of this study. The purpose of this study was to evaluate the population knowledge about using ceramic laminate veneers in Saudi Arabia. No significant difference was found between different laser irradiation powers in the two ceramic groups.Ĭonclusion: Er: YAG laser is effective for debonding of e-max PLVs. But this decrease was only significant for the e-max group (P<0.05). Results: Laser irradiation decreased the shear bond strength of both ceramics. We used Mann-Whitney and Kruskal-Wallis tests for data analysis (P<0.05). The shear bond strength of all samples was measured using a universal testing machine. Then, laser was irra-diated on the cemented PLVs as follows: (I) feldspathic PLVs without laser irradiation (control group), (II) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 200 mJ, 2 W), (III) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W), (IV) e-max PLVs without laser irradiation (control group), (V) e-max PLVs with laser radiation (6 s, 10 Hz, 200 mJ, 2 W), (VI) e-max PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W). Samples of each ceramic were randomly divided into 3 groups of 8 samples. After cementation of all PLVs with a light-cure cement, samples were stored at 37✬ distilled water for 48 h. The PLVs had 0.7 mm thickness and 4 mm diameter. Materials and Methods: Forty-eight intact extracted human maxillary anterior teeth received discoid PLVs (24 feldspathic and 24 e-max ceramic). The purpose of this study was to evaluate the efficacy of Er:YAG laser for debonding of PLVs.
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Conclusion(s): Within the limitations of this study, it was found that ultrasonic scaling significantly affect the debonding force of cemented laminate veneersīackground and Aim: The conventional procedure for removal of porcelain laminate veneers (PLVs) is time-consuming and inconvenient. The T test showed significant difference between 2 groups (p value=0.0016) and 95% CI (29.45☑4.0057). Results: the recorded values of the debonding force mean ±SD for Non-US group were (79.5288 ☑6.5228N) and mean ±SD values recorded for US group were (54.0713 ☘.2647 N). Differences were considered significant at P<0.05. The obtained data were tabulated and analyzed statistically. The debonding force test was applied after cementation and after ultrasonic scaling using Instrone testing machine. The GC Initial LiSi Press Lithium disilicate glass ceramics laminate veneers were fabricated according to manufacturer instructions. They were randomly assigned into 2 groups (n=8), as in group Non-US, the cemented fabricated laminate veneers were not exposed to ultrasonic scaling and in the ultrasonic group (US) the cemented fabricated laminate veneers were exposed to ultrasonic scaling. Materials and Methods: 16 extracted sound upper anterior teeth were prepared to receive laminate veneer restorations. Abstract Background: This in vitro study was conducted to investigate the effect of ultrasonic scaling on debonding of lithium disilicate glass ceramic laminate veneers restorations cemented to tooth structure.