用于带状冠的复合树脂与Protemp 4断裂韧性的比较评估：一项研究。
A Comparative Evaluation of Fracture Toughness of Composite Resin vs Protemp 4 for Use in Strip Crowns: An Study.
作者信息
Vignesh K C, Kandaswamy Eswar, Muthu M S
机构信息
Centre for Early Childhood Caries Research (CECCRe), Department of Pediatric and Preventive Dentistry, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, Tamil Nadu, India.
出版信息
Int J Clin Pediatr Dent. 2020 Jan-Feb;13(1):57-60. doi: 10.5005/jp-journals-10005-1711.
AIM
The aim of this study was to compare the fracture toughness of pedo shade packable composite resin (Z100, 3M ESPE, St. Paul, USA) vs Protemp 4 (3M ESPE, Seefeld, Germany) when used inside a strip crown to restore primary incisors.
MATERIALS AND METHODS
Thirty-six exfoliated noncarious human primary central and lateral incisors were randomly divided into two equal groups. The teeth were prepared to standardized dimensions to receive a strip crown. All the teeth were etched, rinsed, and dried following which bonding agent was applied and light cured. In group I, pedo shade packable composite resin (Z100, 3M ESPE, St. Paul, USA) was packed into strip crowns, placed on the prepared tooth, and light cured. In group II, the strip crowns were filled with Protemp 4 (3M ESPE, Seefeld, Germany), placed on the prepared tooth, and left to autopolymerize for 10 minutes. The strip crowns were removed, and the teeth were tested using the universal testing machine until fracture. Fracture toughness of the two groups was recorded and analyzed statistically using Student's "" test.
RESULTS
The mean force required to fracture strip crowns restored with Protemp 4 (416.89 ± 124.58 N) was higher when compared with pedo shade packable composite resin (338.27 ± 130.99 N). However, statistical analysis did not show a significant difference in the fracture toughness between the two groups ( = 0.074), based on Student's "" test results.
CONCLUSION
The fracture toughness of teeth restored with Protemp 4 was comparable with pedo shade packable composite resin when used inside a strip crown.
CLINICAL SIGNIFICANCE
The use of Protemp 4 is a possible alternative to pedo shade packable composite resin in restoring the primary anterior teeth, when used inside the strip crowns. The data also showed that the fracture toughness of Protemp 4 was comparable with pedo shade packable composite resin.
HOW TO CITE THIS ARTICLE
Vignesh KC, Kandaswamy E, Muthu MS. A Comparative Evaluation of Fracture Toughness of Composite Resin vs Protemp 4 for Use in Strip Crowns: An Study. Int J Clin Pediatr Dent 2020;13(1):57-60.
目的
本研究旨在比较儿童专用可塑形复合树脂（Z100，3M ESPE公司，美国圣保罗）与Protemp 4（3M ESPE公司，德国塞费尔德）用于带环冠内修复乳前牙时的断裂韧性。
材料与方法
36颗脱落的无龋人类乳中切牙和侧切牙被随机分为两组，每组数量相等。将牙齿预备至标准化尺寸以容纳带环冠。所有牙齿均进行酸蚀、冲洗和干燥，然后涂抹粘结剂并光照固化。在第一组中，将儿童专用可塑形复合树脂（Z100，3M ESPE公司，美国圣保罗）填入带环冠中，放置在预备好的牙齿上并光照固化。在第二组中，将带环冠中填入Protemp 4（3M ESPE公司，德国塞费尔德），放置在预备好的牙齿上，让其自凝10分钟。去除带环冠，使用万能试验机对牙齿进行测试直至断裂。记录两组的断裂韧性，并使用学生t检验进行统计学分析。
结果
与儿童专用可塑形复合树脂（338.27±130.99 N）相比，用Protemp 4修复的带环冠断裂所需的平均力（416.89±124.58 N）更高。然而，根据学生t检验结果，两组之间的断裂韧性在统计学上没有显著差异（P = 0.074）。
结论
当在带环冠内使用时，用Protemp 4修复的牙齿的断裂韧性与儿童专用可塑形复合树脂相当。
临床意义
当在带环冠内使用时，Protemp 4可作为儿童专用可塑形复合树脂修复乳前牙的一种可能替代方法。数据还表明，Protemp 4的断裂韧性与儿童专用可塑形复合树脂相当。
如何引用本文
Vignesh KC，Kandaswamy E，Muthu MS。复合树脂与Protemp 4用于带环冠的断裂韧性比较评价：一项体外研究。《国际临床儿科牙科学杂志》2020；13（1）：57 - 60。
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