Aims We evaluated the short-term functional outcome and prevalence of bearing-specific generation of audible noise in 301 patients (336 hips) operated on with fourth generation (Delta) medium diameter head, ceramic-on-ceramic (CoC) total hip arthroplasties (THAs).
Patients and Methods There were 191 female (63%) and 110 male patients (37%) with a mean age of 61 years (29 to 78) and mean follow-up of 2.1 years (1.3 to 3.4). Patients completed three questionnaires: Oxford Hip Score (OHS), Research and Development 36-item health survey (RAND-36) and a noise-specific symptom questionnaire. Plain radiographs were also analysed. A total of three hips (0.9%) were revised.
Results There were 52 patients (54 hips, 17%) who reported noise, and in 25 (48%) of them the noise was frequently heard. In the multiple regression analysis, the only independent risk factor for noise was a specific THA brand, with a threefold increased risk (95% confidence intervals 1.39 to 6.45, p = 0.005) of noise compared with the reference THA brand. Patients with noisy hips had lower median OHS (43 versus 46.5, p = 0.002) and their physical functioning (p = 0.021) subscale in RAND-36 was reduced.
Conclusion Noise was surprisingly common in this population.
Cite this article: Bone Joint J 2017;99-B:44–50.
P. P. Salo: Data collection, Conducting the telephone survey, Data analysis, Writing the paper.
P. B. Honkanen: Performed surgeries, Writing the paper.
I. Ivanova: Data collection, Data analysis.
A. Reito: Data analysis.
J. Pajamäki: Performed surgeries, Literature review for the paper, Proofreading the paper.
A. Eskelinen: Performed surgeries, Writing the paper, Supervising the study.
We would like to thank Biostatistician H. Huhtala, for carrying out the statistical analyses and P. Heath for linguistic revision.
No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
This article was primary edited by S. P. F. Hughes and first proof edited by G. Scott.
- Received November 24, 2015.
- Accepted September 6, 2016.
- ©2017 The British Editorial Society of Bone & Joint Surgery