نقد مقاله انگلیسی بررسی مواد موقت پروتزهای دندانی ثابت با روش CAD/CAM

نقد مقاله انگلیسی “بررسی مقایسه ای مواد موقت پروتزهای دندانی ثابت و ساخت آنها با روش CAD/CAM”

عنوان مقاله: Comparative study of interim materials for direct fixed dental prostheses and their fabrication with CAD/CAM technique

زبان مقاله: انگلیسی

زبان نقد: پارسی

نقد مثبت: دارد

نقد منفی: دارد

نظر نهایی: دارد

اصل مقاله: همراه دارد ( https://pubmed.ncbi.nlm.nih.gov/25935084 )

ویژه دانشجویان کارشناسی ارشد و دکتری

درس: روش تحقیق – روش پژوهش – سمینار

گارانتی: دارد

اصل مقاله انگلیسی پس از خرید نقد، بصورت رایگان قابل دانلود خواهد بود

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Comparative study of interim materials for direct fixed dental prostheses and their fabrication with CAD/CAM technique

Abstract

Statement of problem:

Prosthodontic treatment sometimes requires a long-term interim fixed dental prosthesis (FDP) until the definitive restoration can be cemented. However, some interim materials are weak and do not have an adequate marginal seal.

Purpose:

The purpose of this study was to compare the marginal fit and fracture strengths of interim FDPs fabricated by using a direct technique with different materials (Structur 3, Trim, and DuraLay) with interim prostheses (Telio CAD) made with a computer-aided design and computer-aided manufacturing (CAD/CAM) system.

Material and methods:

Seventy interim FDPs were fabricated by using different materials (Structur 3, Trim, DuraLay, and Telio CAD) on a metal master model. Resin-impregnated, light-polymerizing glass fiber (GrandTEC) was used to reinforce 10 interim FDPs per material fabricated with the direct technique. Interim FDPs were stored at 37°C for 24 hours before thermocycling. Marginal fit was analyzed at 6 points in each interim FDP before and after thermocycling with either 2500 or 5000 cycles. After fracturing the interim FDPs with a universal testing machine, fracture strength, fragments separation, and fracture point were recorded. Marginal fit data were analyzed with 2-way repeated measure analysis of variance (ANOVA), fracture strength with 1-way ANOVA, and fragments separation and fracture point with the chi-square test at a 99% confidence interval.

Results:

All interim materials showed marginal discrepancies over time, but no significant differences were found among groups (P>.001), except in the marginal fit of interim FDPs reinforced with glass fiber (S3F), which showed the smallest marginal gap after 5000 cycles (P<.001). Reinforced interim FDPs (S3F, TMF, and DLF) and CAD/CAM FDPs (TCC) presented a fracture strength ranging between 471.3 ±۶۲.۴ N and 531.1 ±۱۵۰.۱ N (P>.001). Finally, significant differences were observed in the fracture point and frequency of separation (P<.001).

Conclusions:

Bis-acryl reinforced with glass fiber showed the least marginal discrepancy. No differences were found between the fracture strengths of interim FDPs fabricated with CAD/CAM system and interim FDPs reinforced with glass fiber. No significant difference in fracture strength was observed between interim FDPs reinforced with glass fiber and prostheses fabricated with CAD/CAM system. However, unreinforced interim FDPs showed the lowest fracture strength.

Copyright © ۲۰۱۵ Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.