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International Orthopaedics

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05-03-2024 | Periprosthetic Fracture | Original Paper

Experimental periprosthetic fractures with collarless polished tapered cemented stems

Authors: Takuma Yagura, Kenichi Oe, Fumito Kobayasi, Shohei Sogawa, Tomohisa Nakamura, Hirokazu Iida, Takanori Saito

Published in: International Orthopaedics | Issue 5/2024

Abstract

Purpose

After cemented total hip arthroplasty, the risk of periprosthetic fracture (PPF) of taper-slip stems is higher than that of composite-beam stems. We aimed to assess the conditions resulting in PPFs of taper-slip stems using a falling weight.

Methods

Taper-slip stems were fixed to five types of simulated bone models using bone cement, and the fractures were evaluated by dropping stainless-steel weights from a predetermined height onto the heads. The periprosthetic fracture height in 50% of the bone models (PPFH₅₀) was calculated using the staircase method.

Results

For the fixation with 0° of flexion, the values for PPFH₅₀ were 61 ± 11, 60 ± 13, above 110, 108 ± 49, and 78 ± 12 cm for the cobalt–chromium–molybdenum alloy, stainless steel alloy (SUS), titanium alloy (Ti), smooth surface, and thick cement mantle models, respectively; for the fixation with 10° of flexion (considering flexure), the PPFH₅₀ values were 77 ± 5, 85 ± 9, 90 ± 2, 89 ± 5, and 81 ± 11 cm, respectively. The fracture rates of the polished-surface stems were 78.6 and 35.7% at the proximal and distal sites, respectively (p < 0.05); the fracture rates of the smooth-surface stems were 14.2 and 100%, respectively (p < 0.05).

Conclusion

The impact tests demonstrated that the conditions that were less likely to cause PPFs were use of Ti, a smooth surface, a thick cement mantle, and probably, use of SUS.

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Title: Experimental periprosthetic fractures with collarless polished tapered cemented stems
Authors: Takuma Yagura
Kenichi Oe
Fumito Kobayasi
Shohei Sogawa
Tomohisa Nakamura
Hirokazu Iida
Takanori Saito
Publication date: 05-03-2024
Publisher: Springer Berlin Heidelberg
Keyword: Periprosthetic Fracture
Published in: International Orthopaedics / Issue 5/2024
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-024-06136-1

2024 ASCO Annual Meeting

Springer Medicine

Experimental periprosthetic fractures with collarless polished tapered cemented stems

Abstract

Purpose

Methods

Results

Conclusion

2024 ASCO Annual Meeting

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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