Spectral characterization of squeaking in ceramic-on-ceramic total hip arthroplasty: Comparison of in vitro and in vivo values

2011 ◽  
Vol 30 (2) ◽  
pp. 185-189 ◽  
Author(s):  
Elhadi Sariali ◽  
Zhongmin Jin ◽  
Todd Stewart ◽  
John Fisher
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Spectral Characterization ◽  
Total Hip ◽  
Ceramic On Ceramic

scholarly journals In vitro and in vivo evaluations of the fully porous Ti6Al4V acetabular cups fabricated by a sintering technique

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6724-6732 ◽  
Author(s):  
Ji Li ◽  
Wei Li ◽  
Zhongli Li ◽  
Yuxing Wang ◽  
Ruiling Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Total Hip Arthroplasty ◽  
Pore Size ◽  
Hip Arthroplasty ◽  
High Porosity ◽  
Total Hip ◽  
Large Pore ◽  
Large Pore Size

The fully porous Ti6Al4V cup fabricated by the sintered technique showed high porosity, large pore size with good mechanical properties. It may be effective in achieving in vivo stability after the total hip arthroplasty.

Accuracy considerations in navigated cup placement for total hip arthroplasty

2007 ◽  
Vol 221 (7) ◽  
pp. 739-753 ◽  
Author(s):  
U Langlotz ◽  
P A Grützner ◽  
K Bernsmann ◽  
J H Kowal ◽  
M Tannast ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Statistical Simulation ◽  
Learning Curves ◽  
Computer Assisted ◽  
Total Hip ◽  
Computer Assisted Orthopaedic Surgery ◽  
Testing Environments

Computer assisted orthopaedic surgery (CAOS) technology has recently been introduced to overcome problems resulting from acetabular component malpositioning in total hip arthroplasty. Available navigation modules can conceptually be categorized as computer tomography (CT) based, fluoroscopy based, or image-free. The current study presents a comprehensive accuracy analysis on the computer assisted placement accuracy of acetabular cups. It combines analyses using mathematical approaches, in vitro testing environments, and an in vivo clinical trial. A hybrid navigation approach combining image-free with fluoroscopic technology was chosen as the best compromise to CT-based systems. It introduces pointer-based digitization for easily assessable points and bi-planar fluoroscopy for deep-seated landmarks. From the in vitro data maximum deviations were found to be 3.6° for inclination and 3.8° for anteversion relative to a pre-defined test position. The maximum difference between intraoperatively calculated cup inclination and anteversion with the postoperatively measured position was 4° and 5°, respectively. These data coincide with worst cases scenario predictions applying a statistical simulation model. The proper use of navigation technology can reduce variability of cup placement well within the surgical safe zone. Surgeons have to concentrate on a variety of error sources during the procedure, which may explain the reported strong learning curves for CAOS technologies.

Wear of different materials for total hip replacement under adverse stop-dwell-start in vitro wear simulation conditions

2018 ◽  
Vol 232 (12) ◽  
pp. 1261-1270 ◽  
Author(s):  
Megan Hadley ◽  
Catherine Hardaker ◽  
Graham Isaac ◽  
John Fisher
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Activity Cycle ◽  
Relative Increase ◽  
Total Hip ◽  
Metal On Metal ◽  
Metal Metal ◽  
The Impact ◽  
Ceramic On Ceramic

Hip simulation is a common technique for pre-clinical evaluation of wear performance of total hip arthroplasty. Standard techniques replicate kinematics of walking patterns of a typical patient. Attention has focussed in developing simulations of other typical patient daily activities to improve accuracy of wear predictions. A method for simulating stop-dwell-start motion during patient walking and the effect on 36-mm metal-on-metal total hip arthroplasty was previously presented by the authors. This study sought to extend the previous work to look at the effect of these conditions on ceramic-on-ceramic, metal-on-polyethylene and ceramic-on-polyethylene bearings. Two stop-dwell-start protocols were used: one reproducing average patient movement patterns and one examining more severe conditions. For all materials tested, no significant increase in wear was observed under average stop-dwell-start conditions, suggesting the bearing types tested are robust to this type of activity. A significant increase in wear was observed for metal-on-metal, metal-on-polyethylene and ceramic-on-polyethylene bearings under severe stop-dwell-start conditions, this was attributed to depletion of lubricant in the bearing during the dwell period. A greater relative increase in wear was observed for metal-on-metal bearings compared with metal-on-polyethylene and ceramic-on-polyethylene bearings. This may be explained by the contributions of the different lubrication mechanisms in each bearing type. Wear of ceramic-on-ceramic was very low in all tests, suggesting normal measurement variation was masking any effect of the adverse conditions. It was not possible to determine any effect of the different activities. These results emphasise the importance of exploring adverse patient activity simulations. The increase in wear rate associated with an adverse activity such as seen in stop-dwell-start motion, has to be considered in the context of the frequency of the adverse activity cycle relative to other activities such as standard continuous walking, to determine the impact on the total wear in a given time period.

Total Hip Arthroplasty using a Ceramic on Ceramic Bearing Surfaces

2008 ◽  
Vol 43 (4) ◽  
pp. 495 ◽  
Author(s):  
Dae-Jung Kim ◽  
Sung-Chan Ki ◽  
Kyung-Ho Park ◽  
Yoon-Hong Kim ◽  
Young-Yool Chung
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Ceramic Bearing ◽  
Ceramic On Ceramic

Ceramic on Ceramic Hybrid Type Total Hip Arthroplasty in Patients with more than 65 years of Age -Minimum 5-year Follow-up Results

2008 ◽  
Vol 20 (2) ◽  
pp. 91 ◽  
Author(s):  
Song Lee ◽  
Jin Hak Kim ◽  
Dong Oh Ko ◽  
Young Won Jeon ◽  
Seung Jin Yang ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Hybrid Type ◽  
Ceramic On Ceramic
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