Treatment of spontaneous osteonecrosis of the knee (SPONK) by a bisphosphonate A prospective case series with 17 patients
Background and purpose Primary spontaneous osteonecrosis of the knee is a painful lesion in the elderly without any known cause. The onset of pain is usually acute. The prognosis is poor with high frequency of osteoarthritis, joint surface collapse, and subsequent knee surgery. In the present study, we determined whether bisphosphonates can prevent the joint surface collapse by delaying the post-n
