英语语法分析

Objective: To study the treatment of prepatellar bursitis with debridement under arthroscopy.

目的：研究关节镜下治疗髌前滑囊炎的方法。

The patients were followed-up for 6 months to 4 years, and there was not a single case of infection, prepatellar bursitis or early degeneration of the knee joint.

经临床6个月至4年的观察，尚无一例感染，也未出现髌腱炎和膝关节早期退变。

Medial inferior genicular artery and inferior patellar branch of the descending genicular arterial articular branch merge and accede to prepatellar ring on inferior medial to patella.

于髌骨内下方参与形成髌周动脉环的膝降动脉关节支的髌下支或膝下内动脉干长、位置恒定。