A Comparative Study About the Effect of Nonablative Laser and Thermal energy on Rabbit Knee Joint Capsular Properties

Journal of the Korean Shoulder and Elbow Society 2001;4(1):1-12.
Published online June 30, 2001.

Ki-Yong Byun, Kwang-Jin Rhee, Jun-Ho Lee

Department of Orthopaedic Surgery, Chungnam National University, Daejeon, Korea

비융해성 LASER 및 열에너지의 가토 슬관절막에 대한 영향 비교

변기용, 이광진, 이준호

충남대학교 의과대학 정형외과학교실

Abstract

Purpose
: To evaluate the histologic effect(LM and EM findings)of nonablative LASER and thermal energy on knee joint capsule of rabbit. Material and Methods : The nonablative LASER and thermal energy was applied to the rabits(average age 36 weeks, weight 5 kg). There were divided into 4 groups with 6 rabbits in each. The group I received 6 watts of LASER, group II 12 watts of LASER, group III 60° of thermal energy, and group IV 70° of thermal energy. The histologic study included H-E, Massons trichrome stain and electron microscopy at immediate, 3 weeks and 6 weeks after operation. Results : The histologic finding in immediate after operation was shown a fibrous degeneration of collagen on all groups and related to the energy level. The histologic finding after 3 weeks showed fibrosis and this fibrosis related the level of energy. Especially the group IV was shown flattening of capsule and deep fibrosis. The histologic finding after 6 weeks was shown marked recovery of collagen arrangement and capillary proliferation in group I, II and III. But in the group IV not recovered. Conclusion : The nonablative LASER or thermal energy can cause degeneration, fibrosis and contracture of joint capsular collagen.

Key Words: Knee joint capsule, Laser, Thermal energy