Functional Outcome of Total Hip Arthroplasty With Dual Mobility Cups in Hip Arthritis-a Prospective Cohort Study

Background: Dual mobility (DM) total hip arthroplasty (THA) has gained popularity due to its potential to enhance stability and reduce dislocation rates compared to traditional THA constructs. However, there is a need for further investigation into its functional outcomes, complications, and implant survivorship. Method: We conducted a hospital-based prospective study involving 50 patients undergoing total hip replacement over a one-year period. Functional outcomes were assessed using the Harris Hip Score (HHS) and Posterior Muscle Endurance (PME) Score. Descriptive statistics were used for data analysis. Results: The study population consisted predominantly of older patients (mean age 64.30 years), with a higher representation of males (56%). The most common diagnosis was neck of femur fracture (NOF#) (75%), with a balanced distribution of cemented (40%), uncemented (40%), and hybrid (20%) fixation techniques. HHS and PME scores showed significant improvements over 12 months, with excellent outcomes observed in 61.1% of participants. Complications occurred in 14% of patients, with peri-prosthetic fracture and surgical site infection being the most common. Implant survivorship at final follow-up was 94%. Conclusion: Dual mobility cup total hip replacement demonstrates promising outcomes in terms of functional improvement, low complication rates, and high implant survivorship. It represents a viable option for patients undergoing THA, particularly those at risk of dislocation. Further research, including prospective comparative studies, is needed to better understand its long-term efficacy and suitability across different patient populations.