Mid-Term Results of Large-Diameter Ceramic-Bearing Monoblock Acetabular Components in THA.

Introduction: Durability and better function are the challenging issue of any tribological pair. Ceramic on Ceramic (CoC) friction pairs should provide long-term wear and functional results. Objectives: To evaluate the mid-term results of using the monoblock acetabular system Maxera Cup (Zimmer Biomet) in cementless total hip arthroplasty. Materials: and Methods: : We evaluated the THA with Monoblock Maxera Cup (Zimmer Biomet) acetabular system in 93 patients. The mean follow-up was 4 years (49.5 ± 11.7 months). All 103 total hip arthroplasty cases in 93 patients were divided into 3 groups according to the diameters of CoC friction pairs (40, 44, 48 mm) used. The achieved functional results were evaluated using the Harris Hip Score (HHS) scale. Results: : When assessing long-term results, the average score on the HHS scale significantly increased. During the first year after surgery, there was a 2.2-fold improvement in functional results. There was inconsistent creaking in the implanted joint in only 2.6% of cases with a CoC friction pair with a diameter of 44 mm. Conclusions: : The CoC monoblock provides good joint function as perceived by the patient. Acoustic effects, in the form of a minor creaking, did not affect the functional results.