Ben Hatit Y, Blum R, Severin C, Maquin M, Jabro M H
European Laser Academy, Brussels, Belgium.
J Clin Laser Med Surg. 1996 Jun;14(3):137-43. doi: 10.1089/clm.1996.14.137.
The purpose of this study was to compare the effects of scaling and Nd:YAG laser treatments with that of scaling alone on cementum and levels of Actinobacillus actinomycetemcomitans, Bacteroides forsythus, Porphyromonas gingivalis, and Treponema denticola. Study samples consisted of 14 patients, age 30 to 75 years, 8 females and 6 males, with a total of 150 periodontally involved sites with probing depth > or = 5 mm. Group A consisted of 100 pockets that were subdivided into 4 equal groups that were treated with conventional scaling and pulsed Nd:YAG laser using an optic fiber of 300 microns and 4 different power levels as follows: Group 1: P = 0.8 W, f = 10 Hz, E = 100 mJ/pulse; Group 2: P = 1.0 W, f = 1.0 Hz, E = 100 mJ/pulse; Group 3: P = 1.2 W, f = 12 Hz, E = 100 mJ/purse; and Group 4: P = 1.5 W, f = 15 Hz, E = 100 mJ/pulse. The time of each treatment was 60 sec per pocket in all 4 groups. Group B consisted of 50 pockets that were treated by conventional scaling alone and served as a control group. Microbiological samples from group A were collected before scaling; after scaling = before laser, just after laser, 2 weeks later, 6 weeks later, and 10 weeks later. Microbiological samples from group B were collected before scaling, after scaling, 6 weeks later, and 10 weeks later. Microbiological analysis of all samples was done by the Institute Für Angewandte Immunologie (IAI) method. The effects of laser on root surfaces were assessed by SEM examination and the sample consisted of 13 teeth from 5 different patients. Four sets of 3 teeth each were treated with Nd:YAG laser using 0.8, 1.0, 1.2, and 1.5 W, respectively. One tooth was just scaled and not treated with laser to serve as a control. Microbiological analysis of Group A samples indicated posttreatment reduction in levels of all 4 bacterial types tested compared to pretreatment levels and Group B controls. SEM examination of the specimens treated with Nd:YAG laser at different levels exhibited different features of root surface alterations.
本研究的目的是比较龈下刮治和Nd:YAG激光治疗与单纯龈下刮治对牙骨质以及伴放线放线杆菌、福赛坦氏菌、牙龈卟啉单胞菌和具核梭杆菌水平的影响。研究样本包括14名年龄在30至75岁之间的患者，其中8名女性和6名男性，共有150个牙周受累部位，探诊深度≥5mm。A组由100个牙周袋组成，这些牙周袋被平均分为4组，分别用传统龈下刮治和使用300微米光纤及4种不同功率水平的脉冲Nd:YAG激光进行治疗，具体如下：第1组：功率（P）=0.8W，频率（f）=10Hz，能量（E）=100mJ/脉冲；第2组：P = 1.0W，f = 1.0Hz，E = 100mJ/脉冲；第3组：P = 1.2W，f = 12Hz，E = 100mJ/脉冲；第4组：P = 1.5W，f = 15Hz，E = 100mJ/脉冲。所有4组中每个牙周袋的治疗时间均为60秒。B组由50个牙周袋组成，仅接受传统龈下刮治，作为对照组。A组的微生物样本在龈下刮治前、龈下刮治后（即激光治疗前）、激光治疗刚结束后、2周后、6周后和10周后采集。B组的微生物样本在龈下刮治前、龈下刮治后、6周后和10周后采集。所有样本的微生物分析均采用应用免疫学研究所（IAI）方法。通过扫描电子显微镜（SEM）检查评估激光对牙根表面的影响，样本包括来自5名不同患者的13颗牙齿。分别用0.8W、1.0W、1.2W和1.5W的Nd:YAG激光对4组每组3颗牙齿进行治疗。一颗牙齿仅进行龈下刮治，未接受激光治疗作为对照。A组样本的微生物分析表明，与治疗前水平和B组对照组相比，所有4种测试细菌类型的水平在治疗后均有所降低。对用不同功率Nd:YAG激光治疗的标本进行SEM检查，显示出牙根表面改变的不同特征。
