High Hip Center Technique Using a Biconical Threaded Zweymüller® Cup in Osteoarthritis Secondary to Congenital Hip Disease
Nikolaos A. Christodoulou MD, Konstantinos P. Dialetis MD, Athanasios N. Christodoulou MSc
Surgical Technique
- Hip
Volume 468,
Issue
7
/
July ,
2010
Abstract on SpringerLink | 
Full article HTML | 
Full article PDF
Download Citation
Abstract
Background
The high hip center technique used for a deficient acetabulum is reconstruction of the hip at a high center of rotation. In the literature, there is no consensus regarding the value of this technique.
Questions/purposes
We investigated whether the new-generation biconical threaded Zweymüller® cup fixed in a high nonanatomic position in patients with arthritis secondary to congenital hip disease experienced different rates of polyethylene wear and long-term survivorship when compared with anatomically positioned cups.
Patients and Methods
We studied the polyethylene wear rate and Kaplan-Meier survivorship of 104 titanium threaded Zweymüller® cups in 88 patients (81 females), placed in 70 hips at near-normal hip center and in 34 hips at a high hip center position at a distance of 31.1 to 60 mm (mean, 39.7 mm) from the interteardrop line. Minimum followup was 2 years (mean ± SD, 8.6 ± 3.5 years; range, 2–15 years).
Results
The mean linear polyethylene wear rates in the near-normal and high hip center groups were not different (0.110 ± 0.050 mm and 0.113 ± 0.057 mm, respectively). The Kaplan-Meier 15-year cup survivorship rates with revision for any reason as an event of interest in the near-normal and high hip center groups also were not different (97.2% [95% confidence interval, 88.5%–99.3%] and 97.1% [95% confidence interval, 73.8%–99.3%], respectively).
Conclusions
The high hip center technique using a biconical threaded Zweymüller® cup in patients with arthritis secondary to congenital hip disease results in a polyethylene wear rate and long-term cup survivorship comparable to those observed in anatomically positioned cups.
Level of Evidence
Level III, therapeutic study. See the Guidelines for Authors for a complete description of level of evidence.
Go to Issue Contents