Jain Sakshi, Mathur Shivani, Jhingan Pulkit, Sachdev Vinod
Department of Pedodontics and Preventive Dentistry, I.T.S Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India.
J Conserv Dent. 2019 Nov-Dec;22(6):583-587. doi: 10.4103/JCD.JCD_78_19. Epub 2020 Aug 20.
Management of caries using minimally invasive dentistry is prevalent in dentistry today. A newer technology is to disinfect/sterilize caries in depth of the dental tissue with diode laser. However, to have a bactericidal effect, increased energy density of light amplification by stimulated emission of radiation (LASER) may be required which in turn may lead to higher thermal load causing harmful effects on vital pulpal tissue.
The aim was to evaluate temperature rise and efficacy of cavity disinfection with diode laser.
Twenty permanent molar teeth with dentinal caries were randomly assigned into two groups on the basis of LASER irradiation: Group 1 - at 1 W, Group 2 - at 2 W. The elevation of subsurface temperature during irradiation was measured using thermocouples positioned in the center of a prepared cavity. Dentinal samples were collected before and after disinfection of the cavity. These samples were subjected to microbiological evaluation for on Mutans-Sanguis agar and on Rogosa agar.
Log transformed ""-test and paired ""-test were used for the statistical analysis.
Although the reduction in microbial count revealed insignificant difference at two different wattages, the rise in temperature with 1 W was less than that with 2 W.
Efficacy of 1 W and 2 W is similar, but 1 W causes less thermal changes, thus, 1 W is recommended over 2 W.
如今，在牙科领域，采用微创牙科技术治疗龋齿十分普遍。一项新技术是使用二极管激光对牙体组织深层的龋齿进行消毒/灭菌。然而，为了产生杀菌效果，可能需要提高受激辐射光放大（激光）的能量密度，这反过来可能导致更高的热负荷，对牙髓重要组织造成有害影响。
旨在评估二极管激光导致的温度升高以及窝洞消毒的效果。
根据激光照射情况，将20颗患有牙本质龋的恒牙随机分为两组：第1组——功率为1瓦，第2组——功率为2瓦。使用置于预备窝洞中央的热电偶测量照射过程中洞底温度的升高情况。在窝洞消毒前后收集牙本质样本。这些样本分别在变形链球菌- sanguis琼脂和罗格斯琼脂上进行微生物学评估。
采用对数转换后的t检验和配对t检验进行统计分析。
尽管在两种不同功率下，微生物数量的减少显示出无显著差异，但1瓦时的温度升高低于2瓦时。
1瓦和2瓦的效果相似，但1瓦引起的热变化较小，因此，推荐使用1瓦而非2瓦。
