Sharma Aakash, Kulkarni Sadanand, Swamy Kattebelaguli Vn
Department of Pediatric and Preventive Dentistry, Sri Aurobindo College of Dentistry, Indore, Madhya Pradesh, India.
Department of Pedodontics and Preventive Dentistry, Sri Aurobindo College of Dentistry, Indore, Madhya Pradesh, India.
Int J Clin Pediatr Dent. 2019 Jan-Feb;12(1):50-52. doi: 10.5005/jp-journals-10005-1593.
The aim of this study is to determine the effect of ultraviolet irradiation on the bond strength of composite veneer adhered to the SSCs.
Seventy anterior typhodont teeth (API, New Delhi, India) were randomly divided into two groups ( = 35/group) to be crowned with 70 maxillary left central incisor SSCs, size no. 3 (3MESPE, St. Paul, USA). The crowns were adjusted and cemented with the glass ionomer cement (type I, Ivoclar Vivadent, New York, USA). The labial surfaces of the experimental group were exposed to UV irradiation for 80 minutes using the UV chamber (Easy UV Chamber, India) with 2 UV lamps that produced 30 W of power to induce photoactivation. Standardized composite blocks (Ivoclar Vivadent, Gurgaon, India) of 4 × 4 × 1 mm were fabricated using Teflon molds and light cured for 60 seconds. The samples were fixed in the acrylic resin (NicTone62),with a label bearing the number of each sample. The samples were stored in a dry medium for 24 hours and tested using a universal testing machine.
The mean shear bond strength in the non-UV group was 26.03 ± 9.42 MPa, while in the UV group, it was 35.10 ± 14.80 MPa. Thus, there was a statistically significant difference in the mean value of the shear bond strength between the non-UV and UV groups. The shear bond strength in the UV group is much higher as compared with the non-UV group.
Based on this study's results, the following conclusion can be made: ultraviolet irradiation of pediatric stainless steel crowns was found to significantly increase the shear bond strength of composite resin.
UV irradiation could provide suitable adhesion of composite resins to stainless SSCs, leading to in-office veneering of SSCs.
Sharma A, Kulkarni S, Effect of Photoactivation by Ultraviolet Light on Bond Strength of Composite Veneer on Stainless Steel Crowns-An In . Int J Clin Pediatr Dent 2019;12(1):50-52.
本研究旨在确定紫外线照射对复合贴面与不锈钢冠（SSCs）粘结强度的影响。
70颗前磨牙（印度新德里API公司）随机分为两组（每组n = 35），用70个美国圣保罗3MESPE公司生产的3号上颌左中切牙不锈钢冠进行修复。对牙冠进行调整，并用玻璃离子水门汀（美国纽约Ivoclar Vivadent公司I型）粘结。使用配有2个功率为30W紫外线灯的紫外线箱（印度Easy UV Chamber）对实验组的唇面进行80分钟的紫外线照射，以诱导光活化。使用聚四氟乙烯模具制作4×4×1mm的标准化复合树脂块（印度古尔冈Ivoclar Vivadent公司），并光固化60秒。将样本固定在丙烯酸树脂（NicTone62）中，贴上每个样本的编号标签。样本在干燥介质中保存24小时，然后使用万能试验机进行测试。
非紫外线组的平均剪切粘结强度为26.03±9.42MPa，而紫外线组为35.10±14.80MPa。因此，非紫外线组和紫外线组之间的剪切粘结强度平均值存在统计学上的显著差异。与非紫外线组相比，紫外线组的剪切粘结强度要高得多。
基于本研究结果，可得出以下结论：发现对儿童不锈钢冠进行紫外线照射可显著提高复合树脂的剪切粘结强度。
紫外线照射可为复合树脂与不锈钢SSCs提供合适的粘结力，从而实现不锈钢冠的诊室贴面修复。
Sharma A, Kulkarni S, 紫外线光活化对不锈钢冠上复合贴面粘结强度的影响——一项体内研究。《国际临床儿科牙科学杂志》2019年；12(1):50 - 52。
