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Updated: Aug 4, 2026

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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Experience with cementless Protetim 'M' total hip endoprosthesis (A preliminary report)
1Department of Orthopaedics, Semmelweis University Medical School, Budapest, Hungary.
Summary
The cementless Protetim
Area of Science:
- Orthopedic Surgery
- Biomaterials Engineering
Background:
- Cemented endoprostheses are standard for hip replacement.
- Cementless alternatives are being explored for improved outcomes.
Purpose of the Study:
- To evaluate the early clinical outcomes of the cementless Protetim 'M' endoprosthesis.
- To assess the stability and complications associated with this novel implant.
Main Methods:
- Implantation of 17 cementless Protetim 'M' endoprostheses in 17 patients.
- Clinical follow-up averaging 6.2 months (range 5-8 months).
- Radiographic assessment for implant positioning and potential complications.
Main Results:
- 16 out of 17 patients reported no complaints.
- One case showed asymptomatic longitudinal femoral fissuring distal to the stem.
- Good stability was achieved with proper valgus positioning of the femoral component.
Conclusions:
- The cementless Protetim 'M' endoprosthesis shows promising early results.
- Careful attention to femoral component positioning is crucial for stability.
- Further long-term studies are warranted to confirm efficacy and safety.

