scholarly journals Dual mobility cup in hip arthroplasty: an in‐depth analysis of joint registries

2021 ◽  
Author(s):  
Emanuela Castiello ◽  
Alessandro Moghnie ◽  
Domenico Tigani ◽  
Saverio Affatato
Keyword(s):  
Hip Arthroplasty ◽  
Dual Mobility Cup ◽  
Dual Mobility ◽  
Depth Analysis

Minimum 7-Year Outcomes of Dual Mobility Acetabular Cups in Total Hip Arthroplasty Patients

2020 ◽  
Vol 04 (02) ◽  
pp. 090-093
Author(s):  
John M. Tarazi ◽  
Hytham S. Salem ◽  
Joseph O. Ehiorobo ◽  
Nipun Sodhi ◽  
Luke J. Garbarino ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Study Cohort ◽  
Dual Mobility Cup ◽  
Dual Mobility ◽  
Total Hip ◽  
Patient Reported ◽  
Dual Mobility Cups ◽  
Metallic Liner

AbstractModular dual mobility cups have been developed to potentially address postoperative hip instability, which can occur in nearly 20% of all revision total hip arthroplasty (THA) patients. By having a prosthetic construct that contains two points of articulation between the femoral head and liner and between the liner and shell, joint stability can be increased. The purpose of this study was to report on dual mobility cup survivorships, patient satisfaction outcomes, complications, and radiographic outcomes at a minimum 7-year follow-up. A high-volume academic surgeon performed a total of 143 consecutive dual mobility primary THAs on patients who had a minimum follow-up of 7 years (range, 7–8.5 years). The study cohort consisted of 77 females (54%) and 66 males (46%) who had a mean age of 65 years (range, 34–90 years). Aseptic, septic, and all-cause survivorship was determined by Kaplan-Meier analysis. Harris Hip Scores (HHS), postoperative complications, and radiographs were also assessed. No cup failures were observed. Overall, septic survivorship was 99.3% (95% confidence interval [CI]: 0.98–1.0) and all-cause survivorship was 98.6% (95% CI: 0.97–1.0). Two patients (1.4%) required revision surgery unrelated to the use of a modular dual mobility cup. Of these, one patient experienced femoral stem loosening and the other developed a periprosthetic infection that was treated with a two-stage revision. The mean total HHS was above 95 points at the most recent follow-up. Three patients (2.3%) experienced medical complications, including two deep vein thromboses and one for nonfatal pulmonary embolism. Radiographic evidence revealed incomplete seating of the metallic liner in one patient. Dual mobility cups were developed in an attempt to decrease the rate of instability following THA. The results from this study indicate that excellent clinical and patient-reported outcomes can be achieved at 7-year follow-up in patients who undergo THA with a dual mobility cup. Therefore, dual mobility cups appear to be an appropriate treatment option for primary THA.

Midterm survival analysis of a cemented dual-mobility cup combined with bone impaction grafting in 102 revision hip arthroplasties

2017 ◽  
Vol 28 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Elsa A. Spaans ◽  
Koen L.M. Koenraadt ◽  
Robert Wagenmakers ◽  
Joost A.A.M. van den Hout ◽  
Martijn A.J. te Stroet ◽  
...  
Keyword(s):  
Hip Arthroplasty ◽  
Dislocation Rate ◽  
Control Group ◽  
Impaction Grafting ◽  
Dual Mobility Cup ◽  
Chi Square ◽  
Dual Mobility ◽  
Combined Control ◽  
Bone Impaction Grafting ◽  
Hip Arthroplasties

Introduction: Revision hip arthroplasty is associated with higher dislocation rates than primary hip arthroplasty. A dual-mobility cup (DMC) can reduce this risk. Another problem is destruction of the acetabulum, induced by aseptic loosening of the prosthesis. Bone impaction grafting (BIG) can be used to reconstruct these defects, but is usually performed with cemented all polyethylene cups. The purpose of this study is to evaluate midterm cup survival and dislocation rate for the combination of BIG and DMC. Methods: Between 2007 and 2013, 96 patients received 102 DMCs combined with BIG of the acetabulum during revision surgery. These data were first compared with a control group, consisting of 59 cases from the same hospital receiving a cemented all polyethylene cup combined with BIG. In addition, the control group was expanded with 41 cases operated on in 2007 in ‘an orthopaedic centre of excellence’, resulting in a ‘combined control group’ of 100 patients. Log-rank tests and chi-square tests were used to compare survival and dislocation rates, respectively. Results: Cumulative survival of the DMC was 95.8% (range 3 months-7 years). This was comparable to the survival in the control groups (96.5% and 94.7%). The dislocation rate of 2.9% (3/102) in the dual-mobility group was lower (p = 0.02) compared to the dislocation rate of 11.8% (7/59) in the control group, but not (p = 0.12) compared to 8% in the combined control group (8/100). Conclusions: This study shows that combining a DMC with BIG does not compromise outcome in terms of midterm survival of the cup.

Sign in / Sign up

Export Citation Format

Share Document