Excellent Midterm Results of Triflange Patient Matched Implants for Extensive Acetabular Bone Defect

Abstract

Purpose Reconstruction of extensive acetabular bone defects is one of the most challenging problems encountered by arthroplasty surgeons. Triflange patient matched implants (PMI) offer the potential advantages of immediate, rigid fixation with a superior individualized fit. The purpose of this study was to evaluate the clinical and radiographic midterm results of PMI in extensive acetabular defect reconstruction. Materials and Methods The current prospectively designed retrospective review examined 13 consecutive patients (5 males and 8 females) with a mean age of 69 years undergoing revision hip arthroplasty with Paprosky type 3B acetabular defects reconstructed using PMI between October 2011 and December 2016. A successful result was defined as a postoperative increase in Harris hip score (HHS) of >20 points with a radiographically stable implant (assessed with hip X-rays) and no need for additional acetabular reconstruction. Results Twelve out of the 13 patients in the study were available for follow-up with mean duration of 50 months. One patient died during the study period due to an unrelated cause. The mean HHS increased from 41 to 82 points. Eleven out of 12 acetabular components were well fixed and pelvic discontinuity healed in all patients. Conclusion Custom triflange PMI is an excellent option for management of complex and extensive acetabular defects with or without pelvic discontinuity.

Custom triflange acetabular components for large acetabular defect reconstruction in revision total hip arthroplasty: a systematic review and meta-analysis on 1218 patients

“…( 47 ) 2021 RCS 19 19 77 (52–91) 8/11 NA 53 (17–88) 2014 New Kawalkar et al . ( 48 ) 2021 RCS 13 13 69 (57–86) 5/8 27 (NA) 50 (18–70) 2011 New Scharff-Baauw et al . ( 49 ) 2021 PCS 49 49 68 (41–89) 8/41 27.0 (19–44) 24 (NA) 2013 New Sershon et al .…”

Case report: Three-dimensionally printed patient-specific acetabular cage for revision surgery of aseptic loosening in a dog with micro total hip replacement

“…The anatomy of the pelvis had changed as a result of aseptic loosening, so the acetabular cup could not be placed in its normal position. In human medicine, if the bone stock in the acetabulum is insufficient, a patient-tailored cage is used for THR surgery ( 16 – 18 ). Recently in veterinary medicine, Castelli et al ( 19 ) reported a single case using a similar 3D-printed patient-specific acetabular implant in large-breed dogs.…”

“…Often, the explantation of loose implants may be necessary as a last treatment option. Recently, as a way of overcoming these structural limitations, three-dimensional (3D)-printed patient-specific implants for the revision of THR with insufficient acetabular bone stock have been reported in humans ( 16 – 18 ) and large-breed dogs ( 19 ). However, revision strategies for mTHR in small-breed dogs have not yet been reported clinically.…”