A Comparative Histological Study of Bone Healing in Rat Calvarial Defect Using the Erbium-Doped Yttrium Aluminum Garnet Laser and Rotary Instruments

作者：Jung Mi Kyung^*; Kim Su Gwan; Oh Ji Su; Jin Seung Chan; Lee Sook Young; Jang Eun Sook; Piao Zheng Gang; Lim Sung Chul; Jeong Mi Ae

来源：Japanese Journal of Applied Physics, 2012, 51(1): 01AE02.

DOI：10.1143/JJAP.51.01AE02

Erbium-doped yttrium aluminum garnet (Er:YAG) lasers have been used in dentistry for cutting bone and removal of caries. The purpose of this study was to evaluate the bone healing in a skull defect prepared in rats using various instruments including Er:YAG laser. The 7 mm calvarial defects were created in 45 rats and 45 rats were divided into three groups (n = 15): a high-speed rotation engine with carbide round bur (2-mm diameter), a low-speed rotation engine with carbide round bur (2-mm diameter), and an Er:YAG laser. Specimens obtained after 3 days or 4 or 8 weeks were submitted for histological analysis. Three days after surgery, no bone formation had occurred in any of the groups. Four weeks after surgery, 90 +/- 8.16% new bone formation was observed in the high-speed group, and 8 weeks after surgery, 100 +/- 0% new bone formation was observed in the low- and high-speed groups. There were significant differences among the periods after surgery, but no significant differences were observed among final results with in different device groups.

• 出版日期2012-1