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Long-term results of the custom- made hip endoprostheses Evolution K® and Adaptiva®: A prospective cohort study
Author(s) -
Steffen Axt,
Andreas Kirschniak,
Lena Axt,
Manuel Braun,
Christian Beltzer,
Carmen Leichtle,
Ulf Leichtle
Publication year - 2021
Publication title -
orthopedic reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.412
H-Index - 13
eISSN - 2035-8237
pISSN - 2035-8164
DOI - 10.4081/or.2021.9014
Subject(s) - medicine , periprosthetic , region of interest , prosthesis , bone density , nuclear medicine , surgery , osteoporosis , radiology , arthroplasty
The aim of our study is to evaluate clinical long-term results and determine changes in periprosthetic bone density of the custom-made hip prostheses Evolution-K® and Adaptiva®. Periprosthetic bone density were evaluated by means of DEXA (LunariDXA- Prodigy® bone densitometer) with a long-term follow-up of 16 (15-18) years (Evolution-K®) in 24 patients and 13 (13-15) years (Adaptiva®) in 41 patients. Evolution- K® had a survival rate of 92% and yielded 79/100 points in Harris Hip Score, a mediocre result. Adaptiva® had a survival rate of 99% and achieved a good score of 88/100 points. Bone density measurements demonstrated the greatest loss of bone density in the proximal regions of interest (ROI) for both prosthesis types (Evolution-K®: -25.8% ROI 1, -40.3% ROI 7; -8.3% ROI 2, -10.4% ROI 6; Adaptiva®: -29.8% ROI 7, -6.8% ROI 6, +14.3% ROI 3, +3.1% ROI 4). Adaptiva® yielded a good clinical result as compared to Evolution-K® with only average clinical results. Both prostheses clearly showed signs of “stress shielding”. Here, the Adaptiva® achieved reduced bone density loss as compared to the Evolution-K®.

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