Marginal Integrity of Temporary Bridges Constructed by CAD/CAM, Three Dimentional Printer and Conventional Method | ||
| Dental Science Updates | ||
| Article 16, Volume 4, Issue 2, September 2023, Pages 357-365 PDF (618.46 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/dsu.2023.194261.1161 | ||
| Authors | ||
| Mohamed Emetwaly el shazly* 1; Tarek Abdelhamid Abdelhamid2; Mohamed Osama Atta3 | ||
| 1fixed,dentistry | ||
| 2Lecturer of Crown and Bridge. Department of Crown and Bridge. Faculty of dentistry. Suez Canal University | ||
| 3Faculty of Dentistry, Suez Canal University | ||
| Abstract | ||
| Introduction: Temporary restorations are very important in fixed prosthodontic rehabilitation, especially when long-term treatment is needed. Aim: This study aimed to compare the vertical marginal gap of temporary bridges constructed by CAD/CAM, 3D printing and conventional method. Material and methods: The mandibular right second premolar and second molar of a dentoform acrylic resin cast was prepared to receive full coverage fixed partial denture. The model was scanned with Ceramill Map 400 optical scanner. A STL file was transferred to Ceramill motion 2 milling machine to mill twenty-one working models. One model was scanned by In Eos X5 scanner and twenty one standardized full contour temporary bridges were constructed by three different techniques. The bridges (n=21) were grouped into three groups (n=7); group A (CAD/CAM), group B (3D printing ) and group C (Conventional). The retainers marginal gaps were measured using a digital stereomicroscope. Bridges were cemented using Temp Bond NE cement then their vertical marginal gaps were remeasured. Data were analyzed by one way ANOVA and Post Hoc Tests at p≤0.05. Results: The highest mean value was reported with the conventional samples (120.42±6.95 μm) and the lowest value was reported with the 3D printed samples (68.98±9.93 μm) before cementation, while after cementation the highest mean value was reported with the conventional samples (216.6±14.15 μm) and no statistically significant difference between the 3D printed samples and CAD/CAM samples. Data were analyzed by one way ANOVA and Post Hoc Tests at p ≤ 0.05. Conclusion: The method of fabrication of temporary bridges had an effect on the vertical marginal gap. | ||
| Keywords | ||
| KEYWORDS: CAD/CAM; 3D printing; Marginal gap; Milling machine; Temporary bridges | ||
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