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Updated: Jul 16, 2026
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Fractures of Corin 'Taper-Fit' CDH stems used in 'cement-in-cement' revision total hip replacement
T W Briant-Evans1, M R Norton, E D Fern
1Department of Orthopaedics, Royal Cornwall Hospitals NHS Trust, Treliske, Truro, UK. tbriantevans@hotmail.com
Insights
Fracture of Corin Taper-Fit hip stems occurred in two patients during cement-in-cement revision surgery. These fractures happened at a unique design feature, prompting caution for this specific implant in revision procedures.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Materials science
Background:
- Cement-in-cement revision hip arthroplasty is a complex procedure.
- Corin Taper-Fit stems are utilized in specific revision scenarios.
- Congenital hip dysplasia can necessitate complex reconstructive surgeries.
Observation:
- Two cases of Corin Taper-Fit stem fracture are presented.
- Fractures occurred in patients in their 50s following low-demand activity.
- Fracture sites were consistently located at the medial stem introducer holes.
Findings:
- The Corin Taper-Fit stem design, specifically the introducer holes, may be a critical factor in stem failure.
- Fractures occurred at 9 months and 3 years post-implantation.
- High offset stems and constrained acetabular components were noted in the cases.
Implications:
- Caution is advised when using Corin Taper-Fit stems for cement-in-cement hip revisions.
- Further investigation into the biomechanical integrity of the Taper-Fit stem design is warranted.
- This finding may influence future implant selection and surgical techniques in hip revision arthroplasty.
Abstract:
We describe two cases of fracture of Corin Taper-Fit stems used for cement-in-cement revision of congenital dysplasia of the hip. Both prostheses were implanted in patients in their 50s, with high offsets (+7.5 mm and +3.5 mm), one with a large diameter (48 mm) head and one with a constrained acetabular component. Fracture of the stems took place at nine months and three years post-operatively following low-demand activity. Both fractures occurred at the most medial of the two stem introducer holes in the neck of the prosthesis, a design feature that is unique to the Taper-Fit stem. We would urge caution in the use of these particular stems for cement-in-cement revisions.
