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. 2017 Aug 9;14(4):525-529.
doi: 10.1016/j.jor.2017.08.007. eCollection 2017 Dec.

Bone remodelling around the Metha® short stem implant - Clinical and dual-energy x-ray absorptiometry (DXA) results

Markus Fischer  1 , Nicholas A Beckmann  2 , Hans-Georg Simank  1
Affiliations

Bone remodelling around the Metha® short stem implant - Clinical and dual-energy x-ray absorptiometry (DXA) results

Markus Fischer et al. J Orthop. .

Abstract

Objective: Bony ingrowth of short stems is under investigation.

Method: Over one year bony reactions around the Metha® stem were investigated using the DXA method in a standardized zonal system (19 ROIs). Clinical results were documented using the HHS.

Results: HHS significantly improved from 46 points to 97 points. After one year bone marrow density (BMD) increased in the lateral distal and lateral proximal areas as well as in the mid medial area. BMD decreased in the proximal medial and mid lateral areas.

Conclusion: The concept of metaphyseal ingrowth was confirmed, but distal bony reactions need further investigation.

Keywords: Bone mineral density (BMD); Bone remodeling; Dual-energy x-ray absorptiometry (DXA); Metha; Short stem hip arthroplasty.

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Figures

Fig. 1
Fig. 1
Zonal system with index-ROIs defined on the first postoperative DXA measurement (left) and transferred to the preoperative measurement (right).
Fig. 2
Fig. 2
Mean DXA results at the different time points.
Fig. 3
Fig. 3
Anteroposterior (AP) radiograph of a right femur, 6 years after Metha short stem implantation. Note the radiographic shielding in the medial-proximal area and the sclerosis in the lateral distal area of the stem.
See this image and copyright information in PMC

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