Evaluation of the effect of expiration date on composite bond strength and color stability.

IF 1.1 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

American journal of dentistry Pub Date : 2025-10-01

Abdurrahman Yalçin, Veysel Eratilla, Simge Gümüş Ayaz

{"title":"Evaluation of the effect of expiration date on composite bond strength and color stability.","authors":"Abdurrahman Yalçin, Veysel Eratilla, Simge Gümüş Ayaz","doi":"","DOIUrl":null,"url":null,"abstract":"Purpose: To comparatively evaluate the dentin bond strength and color stability of expired and non-expired resin composites (RC).Methods: 48 caries-free teeth were randomly divided into four groups. The specimens were ground to expose the dentin, and an adhesive (GC Premio Bond) was applied and light-cured. RC (GC G-ænial) in shade A2 was applied to each group (according to its expiration date) using a transparent mold (4 mm x 2 mm) and polymerized. Group 1: expired for 2 years; Group 2: expired for 1 year; Group 3: 1 year remaining until expiration; Group 4: 2 years remaining until expiration. The specimens were immersed in distilled water for 24 hours and then placed in a tea solution, with color measurements taken using a spectrophotometer (EasyShade V) on the 1st, 7th, and 28th days. (CIEDE 2000 formula: L* = 94.48, a* = 0.16, and b* = -0.21). After the color measurements, the specimens underwent a shear bond strength test applied to the bonding interface between the tooth and the composite using a universal testing machine and the values were recorded.Results: The E1 measurements exhibited the lowest mean color change (5.88 ± 1.02), whereas the E3 measurements had the highest mean color change value (10.13 ± 3.35). The lowest bond strength was observed in Group 1 (97.25 ± 20.33), while the highest value was found in Group 4 (149.45 ± 32.75). The differences between Group 1 and Groups 3 and 4 were statistically significant.Clinical significance: In clinical practice, adherence to proper storage conditions and expiration dates is essential to ensure the success and quality of resin composite materials, which are frequently used in routine dentistry. Within the limitations of this study, the color stability and bond strength of resin composites decreased after expiration dates. Therefore, to achieve optimal clinical results, it is crucial to ensure that restorations are performed using non-expired resin composites.","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 4","pages":"237-241"},"PeriodicalIF":1.1000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American journal of dentistry","FirstCategoryId":"3","ListUrlMain":"","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose: To comparatively evaluate the dentin bond strength and color stability of expired and non-expired resin composites (RC).

Methods: 48 caries-free teeth were randomly divided into four groups. The specimens were ground to expose the dentin, and an adhesive (GC Premio Bond) was applied and light-cured. RC (GC G-ænial) in shade A2 was applied to each group (according to its expiration date) using a transparent mold (4 mm x 2 mm) and polymerized. Group 1: expired for 2 years; Group 2: expired for 1 year; Group 3: 1 year remaining until expiration; Group 4: 2 years remaining until expiration. The specimens were immersed in distilled water for 24 hours and then placed in a tea solution, with color measurements taken using a spectrophotometer (EasyShade V) on the 1st, 7th, and 28th days. (CIEDE 2000 formula: L* = 94.48, a* = 0.16, and b* = -0.21). After the color measurements, the specimens underwent a shear bond strength test applied to the bonding interface between the tooth and the composite using a universal testing machine and the values were recorded.

Results: The E1 measurements exhibited the lowest mean color change (5.88 ± 1.02), whereas the E3 measurements had the highest mean color change value (10.13 ± 3.35). The lowest bond strength was observed in Group 1 (97.25 ± 20.33), while the highest value was found in Group 4 (149.45 ± 32.75). The differences between Group 1 and Groups 3 and 4 were statistically significant.

Clinical significance: In clinical practice, adherence to proper storage conditions and expiration dates is essential to ensure the success and quality of resin composite materials, which are frequently used in routine dentistry. Within the limitations of this study, the color stability and bond strength of resin composites decreased after expiration dates. Therefore, to achieve optimal clinical results, it is crucial to ensure that restorations are performed using non-expired resin composites.

本刊更多论文

有效期对复合粘结强度和颜色稳定性影响的评价。

目的：比较评价过期和未过期树脂复合材料（RC）的牙本质结合强度和颜色稳定性。方法：48颗无龋牙随机分为4组。将标本磨碎，露出牙本质，涂上一种胶粘剂（GC Premio Bond）光固化。使用透明模具（4 mm x 2 mm）将遮阴为A2的RC （GC G-ænial）应用于每组（根据其有效期）并进行聚合。第一组：过期2年；第二组：过期1年；第三组：有效期为1年；第4组：有效期为2年。将标本在蒸馏水中浸泡24小时，然后放入茶叶溶液中，于第1、7、28天使用分光光度计（EasyShade V）测量颜色。（CIEDE 2000公式：L* = 94.48, a* = 0.16, b* = -0.21）。颜色测量结束后，在万能试验机上对牙齿与复合材料的粘结界面进行剪切强度测试，并记录其数值。结果E1组平均颜色变化最小（5.88±1.02），E3组平均颜色变化最大（10.13±3.35）。第1组粘结强度最低（97.25±20.33），第4组粘结强度最高（149.45±32.75）。1组与3、4组比较，差异均有统计学意义。临床意义：在临床实践中，遵守适当的储存条件和有效期是确保树脂复合材料成功和质量的关键，树脂复合材料是常规牙科中经常使用的材料。在本研究的限制范围内，树脂复合材料的颜色稳定性和结合强度在保质期后下降。因此，为了达到最佳的临床效果，确保使用未过期的树脂复合材料进行修复是至关重要的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

American journal of dentistry 医学-牙科与口腔外科

CiteScore

2.40

自引率

7.10%

发文量

审稿时长

1 months

期刊介绍： The American Journal of Dentistry, published by Mosher & Linder, Inc., provides peer-reviewed scientific articles with clinical significance for the general dental practitioner.