@article{oai:hsuh.repo.nii.ac.jp:00008812,
 author = {東日本学園大学歯学会 and SHINOZAKI,Khoji/HOSOKAWA,Yoichiro/MINAMI,Seiji/SANO,Tomoaki/FUJII,Takeo/KANEKO,Masayuki},
 issue = {1},
 journal = {東日本歯学雑誌},
 month = {Jun},
 note = {P(論文), The purpose of this study was to evaluate the clinical efficacy of the CO_2 laser in a prospective randomized trial. A total of 112 teeth in 112 patients, previously treated pulpectomy procedures were gathered and randomly divided into two groups composed of 56. Irradiation was performed on one group and non-irradiation forms of treatment were performed on the other group. On the first group of teeth, root canal enlargement was done and followed by exposure of the canal to a CO_2 laser light (5W, 200msec) using 3 cycles each at a rate of 15 seconds per cycle. The second group was not exposed to laser light following root canal enlargement. The laser was applied on the root canal for a controlled period of time. On the day following pulpectomy, a statistically significant (p < 0.05) fewer number of patients observed pain in the irradiation group compared to the non-irradiation group. The treatment times and the total treatment days in the irradiation group are shorter than in the non-irradiation group (p < 0.05). Multivariate analysis showed that the laser treatment was significantly associated with treatment times. This study shows that the degree of oral pain was greatly reduced in patients who underwent laser irradiation as compared to these who did not. Our study suggests that the use of laser treatment provide significant short-term improvement compared to conventional forms of treatment performed during pulpectomy.},
 pages = {21--27},
 title = {<ORIGINAL>A prospective randomized clinical study on the efficacy of CO_2 lasers on initial stage endodontics},
 volume = {22},
 year = {2003}
}