scholarly journals Clinical Outcomes of Ceramicized Ball Heads in Total Hip Replacement Bearings: A Literature Review

2017 ◽  
Vol 15 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Corrado Piconi ◽  
Vincenzo De Santis ◽  
Giulio Maccauro
Keyword(s):  
Clinical Outcomes ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Pyrolytic Carbon ◽  
Carbon Coatings ◽  
Ceramic Ball ◽  
Total Hip ◽  
Head Surface ◽  
Cocr Alloy ◽  
Cobalt Chrome

Background Metallic ball heads for total hip replacement (THR) bearings with ceramicized surfaces were introduced in orthopedics during the second half of the 1980s, with the aim of decreasing the wear of polyethylene cups. Methods An analysis was made of the literature regarding outcomes for metallic ball heads with ceramicized surfaces now in clinical use (TiN, TiNbN, ZrN, monoclinic ZrO2), as well as carbon coatings (pyrolytic carbon, diamond-like carbon) and silicon nitride as coatings in ball heads for THR bearings. Results Notwithstanding the diffusion of ceramicized ball heads in THRs, there are few reports about their clinical outcomes in hip arthroplasty. In addition, several clinical studies and some registry data are putting under scrutiny the clinical advantages of ceramicized ball heads over cobalt chrome (CoCr) alloy and ceramic ball heads. Conclusions The wear of THR bearings with ceramicized ball heads looks like it depends more on the behavior of the polyethylene cups than on the treatment of the ball head surface. The risk of coating damage and of its consequences has to be taken into account in selecting this type of bearing.

scholarly journals Uncemented versus cemented arthroplasty after metal-on-metal total hip replacement in patients with femoral neck fractures: a retrospective study

2021 ◽  
Vol 49 (5) ◽  
pp. 030006052110122
Author(s):  
Wenlu Liu ◽  
Huanyi Lin ◽  
Xianshang Zeng ◽  
Meiji Chen ◽  
Weiwei Tang ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Clinical Outcomes ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Femoral Neck Fractures ◽  
Harris Hip Score ◽  
Complication Rates ◽  
Total Hip ◽  
Metal On Metal

Objective To compare the clinical outcomes of primary metal-on-metal total hip replacement (MoM-TR) converted to uncemented total hip replacement (UTR) or cemented total hip replacement (CTR) in patients with femoral neck fractures (AO/OTA: 31B/C). Methods Patient data of 234 UTR or CTR revisions after primary MoM-TR failure from March 2007 to January 2018 were retrospectively identified. Clinical outcomes, including the Harris hip score (HHS) and key orthopaedic complications, were collected at 3, 6, and 12 months following conversion and every 12 months thereafter. Results The mean follow-up was 84.12 (67–100) months for UTR and 84.23 (66–101) months for CTR. At the last follow-up, the HHS was better in the CTR- than UTR-treated patients. Noteworthy dissimilarities were correspondingly detected in the key orthopaedic complication rates (16.1% for CTR vs. 47.4% for UTR). Statistically significant differences in specific orthopaedic complications were also detected in the re-revision rate (10.3% for UTR vs. 2.5% for CTR), prosthesis loosening rate (16.3% for UTR vs. 5.9% for CTR), and periprosthetic fracture rate (12.0% for UTR vs. 4.2% for CTR). Conclusion In the setting of revision of failed primary MoM-TR, CTR may demonstrate advantages over UTR in improving functional outcomes and reducing key orthopaedic complications.

Surgical challenges and clinical outcomes of total hip replacement in patients with Down’s syndrome

2013 ◽  
Vol 95-B (11_Supple_A) ◽  
pp. 41-45 ◽  
Author(s):  
M. G. Zywiel ◽  
M. A. Mont ◽  
J. J. Callaghan ◽  
J. C. Clohisy ◽  
Y. Kosashvili ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Down's Syndrome ◽  
Down’S Syndrome ◽  
Total Hip

scholarly journals Influence of Different Damage Patterns of the Stem Taper on Fixation and Fracture Strength of Ceramic Ball Heads for Total Hip Replacement

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Danny Vogel ◽  
Jessica Hembus ◽  
Mario Jackszis ◽  
Vera Bolte ◽  
Rainer Bader
Keyword(s):  
Dynamic Loading ◽  
Total Hip Replacement ◽  
Significant Influence ◽  
Fracture Strength ◽  
Hip Replacement ◽  
Ceramic Ball ◽  
Total Hip ◽  
Stem Taper ◽  
Dynamic Group ◽  
Prosthetic Head

Background. Modularity finds frequent application in total hip replacement, allowing a preferable individual configuration and a simplified revision by retaining the femoral stem and replacing the prosthetic head. However, micromotions within the interface between the head and the stem taper can arise, resulting in the release of wear debris and corrosion products. The aim of our experimental study was to evaluate the influence of different taper damages on the fixation and fracture stability of ceramic femoral heads, after static and dynamic implant loading. Methods. Ceramic ball heads (36 mm diameter) and 12/14 stem tapers made of titanium with various mild damage patterns (intact, scratched, and truncated) were tested. The heads were assembled on the taper with a quasistatic load of 2 kN and separated into a static and a dynamic group afterwards. The dynamic group (n=18) was loaded over 1.5 million gait cycles in a hip wear simulator (ISO 14242-1). In contrast, the static group (n=18) was not mechanically loaded after assembly. To determine the taper stability, all heads of the dynamic and static groups were either pulled off (ASTM 2009) or turned off (ISO 7206-16). A head fracture test (ISO 7206-10) was also performed. Subsequent to the fixation stability tests, the taper surface was visually evaluated in terms of any signs of wear or corrosion after the dynamic loading. Results. In 10 of the 18 cases, discoloration of the taper was determined after the dynamic loading and subsequent cleaning, indicating the first signs of corrosion. Pull-off forces as well as turn-off moments were increased between 23% and 54% after the dynamic loading compared to the unloaded tapers. No significant influence of taper damage was determined in terms of taper fixation strength. However, the taper damage led to a decrease in fracture strength by approximately 20% (scratched) and 40% (truncated), respectively. Conclusion. The results suggest that careful handling and accurate manufacturing of the stem taper are crucial for the ceramic head fracture strength, even though a mild damage showed no significant influence on taper stability. Moreover, our data indicate that a further seating of the prosthetic head may occur during daily activities, when the resulting hip force increases the assembly load.

scholarly journals Comparison of Functional and Clinical Outcomes between Minimally-Invasive and Conventional Approaches after Total Hip Replacement

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Goetz J ◽  
◽  
Renkawitz T ◽  
Meyer M ◽  
Woerner M ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Clinical Outcomes ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Total Hip

Comparison of Functional and Clinical Outcomes between Minimally-Invasive and Conventional Approaches after Total Hip Replacement

The Incidence of Fracture in Total Hip Replacement Femoral Components

1978 ◽  
Vol 7 (2) ◽  
pp. 107-110 ◽  
Author(s):  
H. S. Dobbs
Keyword(s):  
Femoral Component ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Fracture Rate ◽  
Total Hip ◽  
Total Hip Replacements ◽  
Orthopaedic Hospital ◽  
Hip Replacements ◽  
Cobalt Chrome

The paper reports on the incidence of fracture of the femoral component of total hip replacements in patients at the Royal National Orthopaedic Hospital over the period 1963-1976. The average incidence of fracture was approximately 0.2 per cent per year for air melt air cast cobalt chrome components. For vacuum melt vacuum cast components there were no fractures, but because of the small number of insertions with a long follow-up period, this result could have been fortuitous. There was a suggestion that the fracture rate increased with time, but even 0.2 per cent is considered too high.

Sign in / Sign up

Export Citation Format

Share Document