DOS 2018

DOS Kongressen 2018 · 211 HemiCAP for Hallux Rigidus: Good function and excellent pain relief at 5-8 year follow-up Kristian Henrik Brink Behrndtz, Asmus Overbeck Petersen, Karen Toftdahl Bjornholdt Orthopedic, Regional Hospital Horsens Background: Hallux rigidus is osteoarthritis of the first metatarso- phalangeal joint leading to decreased dorsiflexion and pain, previously treated by arthrod- esis. To avoid problems of non-union, mal-union and footwear difficulties, and to preserve some dorsiflexion, hemiarthroplasty is now an option. However, few medium-long-term studies have been available. Purpose / Aim of Study: To evaluate the medium-long term results of the Orthotech HemiCAP® implant in patients with hallux rigidus. Materials and Methods: A clinical prospective observational study of 31 consecutive patients (38 feet) treated with the HemiCAP implant at Horsens Regional Hospital from 2009-2013 were contacted and offered evaluation by clinical examination, weight-bearing x- rays, American Orthopaedic Foot and Ankle Society Hallux Metatarsophalangeal-Interphalangeal Scale (AOFAS-MTP- IP), and visual analogue scale for pain intensity (VAS). Findings / Results: Of the 31 patients, 23 patients (28 feet) agreed to par- ticipate, 3 patients (5 feet) had died of unrelated causes, and 5 patients (5 feet) did not wish to participate. Follow-up time was 5,1-8,5 (mean 6,8) years. No implants had been revised. The mean dorsiflexion had improved from 15 de- grees to 28 degrees. X-rays showed no signs of loosening, but varying degrees of subsidence into the base of the proximal phalanx. AOFAS-MTP-IP scores improved from 52 preoperatively to 84 at follow-up. Pain intensity decreased from 7,1 preoperatively to 1,1 at follow-up. Of the 23 participating patients, 19 (83 %) would choose this treatment again, 3 (13 %) would not, and 1 (4 %) did not know. Conclusions: Good functional results and excellent pain relief was obtained at 5-8 years follow-up with the HemiCAP implant for hallux rigidus. No revisions or radiographic loosening were seen, but varying subsidence into the base of the proximal phalanx was observed. 152.