Abstract
Objective To study the effect on the proprioception after Brostrom reconstruction for lateral ankle ligament in rabbit. Methods Six-three adult New Zealand white rabbits were used in this study. Nine rabbits were random selected as the blank control group, these rabbits were sacrificed and the lateral ankle ligaments were taken. The rest were all cut the lateral ankle ligament. Twenty-seven rabbits were performed Brostrom reconstruction as the experimental group, and the other were left the apocoptic lig- ament as the experimental control group. At 2, 6, and 12 weeks after operation, 9 rabbits of each experimental group were sacrificed, and the lateral ligament of ankle were taken randomly for observation. All the lateral ligaments of ankle were stained with a modification of gold-chloride method. We counted the mechanore- ceptors under light microscope. Results We identified the four mechanoreceptors： Ruffini receptors, Pacini receptors, Golgi tendon organ-like receptors and free nerve endings, and the first three of them were counted. The amount of mechanoreceptors in blank control group was 21.0±3.5, in experiment group at 2, 6, and 12 weeks after operation were 12.7±2.1, 13.0±3.0, and 16.0±2.0 respectively, and in experiment control group was 7.7±1.5, 4.7±1.5, and 6.3±0.6 respectively. The difference among the 2, 6 and 12 weeks after operation in experiment group were statistically significant （F=7.53, P=-0.00） and similarly in experiment control group （F=16.27, P=0.00）, as time goes on, the amount of meehanoreceptors were increasing gradually. The difference among three group at the 2, 6 and 12 weeks after operation separately were statistically significant （F= 88.75, 102.91, 122.53, P=0.00）, the amount of mechanoreceptors in experiment group were more than in experiment control group, and lesser than in blank control group. Conclusion After rupture of the lateral an- kle ligament of rabbit, whether operation or not, the ligament＇s mechanoreceptors will be decreased. Brostr0m anatomical reconstruction for the ruptured ligament can retain the maximum amount of mechanoreceptors. Key words: Rabbits; Lateral ligament, ankle; Reconstructive surgical procedures; Proprioception; Mechanoreceptors
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