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An in vitro evaluation of tensile strength of molar endocrown milled from various computer aided design and manufacturing materials
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An in vitro evaluation of tensile strength of molar endocrown milled from various computer aided design and manufacturing materials
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Journal Article
An in vitro evaluation of tensile strength of molar endocrown milled from various computer aided design and manufacturing materials
2024
Overview
New computer-aided design and computer-aided manufacturing (CAD-CAM) materials have been reported to have suitable mechanical and physical properties for endocrown restorations. However, there is a lack of literature on evaluating the retention of endocrown using these materials. This in vitro study aimed to compare the retention of endocrowns fabricated from 3 different CAD-CAM materials. Sixty human mandibular third molars were divided into 3 groups (
n
= 20) according to the material used: (e.max CAD, Ivoclar AG, Schaan, Liechtenstein), (HC, Shofu, Koyoto, Japan), and (Brilliant Crios, Coltene, Altstätten, Switzerland) (
n
= 20). Specimens were stored in distilled water at 37 °C for 1 week and subjected to 5000 thermal cycles. A universal testing machine (5500R/1123, Instron, Norwood, USA) was used to measure the tensile force. All results were statistically analyzed using one-way ANOVA (α = 0.05), and different failure modes were demonstrated. The results revealed that e. max CAD showed the highest mean tensile force value (402.35 ± 15.812) N, and the lowest mean tensile force value was for Brilliant Coris (118.90 ± 12.430) N (
P
< .001). It is concluded that e.max CAD endocrowns showed the highest tensile force values after thermocycling in comparison to other materials with a significant difference, which may have a promising impact on the survival of endocrown restorations.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ CAD
/ Crowns
/ Dental Materials - chemistry
/ Humanities and Social Sciences
/ Humans
/ Molar
/ Molars
/ Science
