Proximal interphalangeal joint arthroplasty with Tactys®: Clinical and radiographic results with a minimum follow-up of 12 months

The Tactys (R) implant is a total anatomic gliding and modular prosthesis for proximal interphalangeal (PIP) arthritis. We report the clinical and radiographic results of this implant with a minimum follow-up of 12 months. Thirty-three implants in 27 patients with a mean age of 67 years were reviewed. Surgical approach was mid-line dorsal and trans-tendinous. Postoperative active motion was performed with a protective splint for 4 weeks. All patients were evaluated (pain, range of motion, strength, function through QuickDASH and PRWE scores, X-rays) by an independent examiner. The mean follow-up was 21 months (range: 12-30). Pain decreased from 7.4 to 1.6 on a VAS scale (P < 0.001). Flexion-extension range of motion increased from 32.1 degrees to 59.2 degrees (P < 0.001). Functional QuickDASH and PRWE improved from 64.5 and 67.1 to 25.5 and 19.5, respectively (P < 0.001). Grip and pinch strength increased from 15.1 and 1.8 to 24.2 and 2.4 kg/F, respectively (P < 0.001). At the last follow-up, a swan neck deformity was noticed in three patients, which was reducible in all cases. Four patients were reoperated: dorsal tenoarthrolysis in three cases and correction of swan neck deformity in one case. On X-rays, asymptomatic penprosthetic ossifications were noticed in 13 cases (39%). There were no signs of implant migration or loosening. Our results are comparable to those of other published studies of PIP arthroplasty. The modularity of the Tactys (R) implant allows the range of motion of the PIP joint to be maintained. It is a reliable alternative to other conventional PIP implants. Level of evidence: Level 4, case series. (C) 2018 SFCM.Published by Elsevier Masson SAS. All rights reserved.