DOS 2018

108 · DOS Abstracts Early results after cup revision in primary trapeziometacarpal joint arthroplasty Lene Dremstrup, Lone Stilling, Lone Kirkeby, Lotte Priess Larsen, Torben Bæk Hansen University Clinic for hand, hip and knee surgery, Regional Hospital West Jutland, Holstebro; Department of Orhopaedics, Aarhus University Background: Cup failure is a recognized problem in total trapeziometacar- pal (TM) joint prostheses and therefore options for cup revision are needed. Trapeziectomy has been the primary salvage procedure and has shown better results than revision to a cemented cup. Since 2013 we have used cementless cup revision. Purpose / Aim of Study: To evaluate the early results after cementless cup revision in TM joint arthroplasty. Materials and Methods: A cohort of 23 patients (21 female) at mean age 56 years (range 46-72) were followed prospectively after cup revision in primary TM joint prosthesis. Indications for surgery were pain, dislocation, aseptic cup loosening. Cementless Moovis pressfit cup without bonegrafting (n=4) or ce- mentless Moovis screw cup with distal radius cancellous bone autograft (n=19) were used. Patients were evaluated with grip strength, DASH score, pain mea- sured by VAS at rest and activity, and standard radiographs preoperatively and after 3, 12, 24 months. Mean follow up time was 18.2 months (range 3-60). 20 patients had 12 months follow up. Findings / Results: At one-year follow up DASH improved 18 (SD 21) points (p<0.002), grip strength improved 7.7 (SD 4.4) kg (p=0.009), and VAS pain at activity improved 3.8 (SD 2.5) points (p<0.004). 19 patients had radiographs with well-fixed cups based on visual judgement. One patient was revised to a trapeziectomy after 3 months because of cup loosening. There were no other revisions or complications. At two-years patients reported mean VAS 9.8 (range 8-10) on satisfaction with their result and all were willing to repeat the proce- dure. Conclusions: Cementless cup revision after failed total TM joint arthroplasty provides clinically relevant functional improvement and high patient satisfaction at short-term follow up. Results are at the level of primary trapeziectomy in a similar age group. 49.