环状韧带 meaning in Chinese

annular ligament
annular orbicular ligament

Clinical observation on combination of chinese medicine and western medicine for the treatment of 31 cases of pediatric old fracture
用环状韧带成形术治疗儿童陈旧孟氏骨折15例
Pathology of buttonhole deformity of monteggia fracture - dislocation and suitability of reconstructive surgery of anular ligaments
小儿孟氏骨折脱位扣眼畸形的病理认识以及环状韧带重建术的探讨