article · The Egyptian Orthopaedic Journal
This study investigated the occurrence of prosthetic dislocation following total hip replacement (THR) at a hospital in Tanzania, aiming to address a knowledge gap in sub-Saharan Africa. Researchers retrospectively analysed data from 389 patients who underwent THR between 2016 and 2020, collecting information on demographics, surgical details, and dislocation events. The study found that 4.1% of patients experienced prosthetic dislocation. Most dislocations occurred in male patients, those over 80 years old, and individuals who had THR due to neck of femur fractures. A significant majority of these dislocations happened within three months of surgery and were often spontaneous. The findings highlight that age is a significant factor associated with dislocation.
Understanding the patterns and risk factors for prosthetic dislocation after total hip replacement is crucial for improving patient outcomes. This research helps clinicians identify patients at higher risk, enabling better pre-operative planning and post-operative care strategies to reduce complications and improve recovery.
The abstract does not indicate a direct application pathway for commercialisation. The findings are clinical observations that can inform surgical practice and patient management protocols, rather than suggesting a new product, service, or technology for market.
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BackgroundDislocation of the prosthesis is a serious complication after total hip replacement (THR) with the overall rate ranging between 0.2 and 10%. It is responsible for the higher rate of readmission; long hospital stays and the majority of early revision surgeries. A little is known about this topic in sub–Saharan Africa; This study aimed at addressing the knowledge gap on the epidemiology of prosthetic dislocation among patients who underwent THR in our locality.Patients and MethodsA retrospective descriptive study was conducted at Muhimbili Orthopedics Institute among patients who had THR between 2016 and 2020. The standardized data extraction sheet was used to collect information on age, gender, indication for THR, surgical approach, type of prosthesis, presence of dislocation, mechanism for dislocation and time interval from surgery to dislocation.ResultsA total of 389 participants were enrolled, out of which 229(59%) were male and 160(41%) were female; all the patients underwent THR by direct lateral approach. Sixteen patients (4.1%) had a prosthetic dislocation, most of which occurred among male subjects (4.8%) P value= 0.4. Most dislocation occurred in those above 80 years (14.3%) P value= 0.02. Patients with the neck of femur fractures had highest rate of prosthetic dislocations (7.4%) when compared with the other indications of surgery (P value= 0.2). Most dislocations occurred within three months of surgery (68.7%), and the most common mechanism was spontaneous dislocation (56.3%).ConclusionsThe rate of prosthetic dislocation after THR is high in our setting; Majority are early and occur spontaneously. Age is significantly associated with occurrence of dislocation. Therefore, stratifying risk especially in elderly patients and extra precautions in early days following THR is important. Furthermore, prospective studies should be done on risk factors for dislocation after THR.
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DOI: 10.21608/eoj.2025.431793
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