Cementless Zweymüller Hip Replacement: A Short-Term Follow-Up in Al Razi Hospital, Kuwait

Abstract

Objective: To present initial experience of the first 71 cases of cementless total hip replacement in Al Razi Hospital. Subject and Methods: Between 1996 and 2004, total hip replacement was performed in 71 patients (40 male, 31 female, average age 40.7 years, range 17–74) using Zweymüller cementless prosthesis. The patients were followed clinically and radiologically over an average period of 36 months (range 6–84). The results were assessed according to Merle d’Aubigne clinical score. Radiological assessment included position of the implant, behavior of the prosthesis/bone interface and signs of osteointegration. Results: Average clinical score during the 3 years’ follow-up period was 17.8 points. Most of the implants were in optimal positions. No significant radiological modifications of the implant-bone interface were observed. Conclusion: Zweymüller total hip prosthesis gives excellent clinical and radiological results in short-term follow-up.

Osseointegration: a review of the fundamentals for assuring cementless skeletal fixation

“…12 For instance, follow up studies of the Zweymüller ® hip implant system (Zimmer Holdings, Inc., Warsaw, IN, USA) have demonstrated no stem revisions and exceptionally high implant survivorship using a tapered design. 104,105 Preventing and treating initial and delayed infections…”

Effectiveness of resonance frequency in predicting orthopedic implant strength and stability in an in vitro osseointegration model

“…The hexagonal design included an 8 mm base to fit securely on the ABS device and prevent translation and rotation during data collection (Figure 1). Titanium alloy was also selected as the implant material based on its frequent successful use in total joint replacements [66][67], biocompatibility [68][69], and nonferromagnetic properties [70][71] that would not alter RFA recordings. Three 3 mm holes were evenly spaced and drilled 5 mm apart in the ABS fixture to represent partial osseointegration along the titanium implant insert (Figure 1).…”

Good Mid- to Long-Term THA Outcomes with a Modified Cementless Rectangular Biconical Stem Design

“…Primary implant stability in cementless THA, which is essential for permanent anchorage, is achieved through mechanical interlock between the bone stock and implant (2), and relies on both the shape of the implant and the quality of implantation (3). Secondary stability is achieved through osseointegration (3–4–5), which depends on the surface structure of the implant and the degree of implant stability, among other factors (3).…”