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.

Manufacturing, oxidation, mechanical properties and clinical performance of highly cross-linked polyethylene in total hip arthroplasty

2018 ◽  
Vol 28 (6) ◽  
pp. 573-583 ◽  
Author(s):  
Gurpreet Singh ◽  
Robert Klassen ◽  
James Howard ◽  
Douglas Naudie ◽  
Matthew Teeter ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
First Generation ◽  
Clinical Performance ◽  
Wear Rates ◽  
Total Hip ◽  
Uhmwpe Wear

Ultra-high molecular weight polyethylene (UHMWPE) continues to be the gold standard bearing surface in total hip arthroplasty (THA) for nearly 5 decades. Highly cross-linked UHMWPE (HXLPE) was adapted for routine use in the early 2000s to reduce the revision rates related to wear, osteolysis, and aseptic loosening resulting from conventional UHMWPE wear. Since its inception, consistent evidence showing reduced wear rates and osteolysis supports the use of HXLPE in THA. High quality studies demonstrating the advantage in long term survivorship of HXLPE over conventional UHMWPE are emerging. Though retrieval studies have demonstrated evidence of in vivo oxidation and fatigue related damage at the rim of the first generation HXLPE liners, clinical significance of this remains to be seen. Second-generation sequentially annealed and vitamin E containing HXLPE liners demonstrate improved mechanical properties, resistance to oxidation, and equivalent wear rates in comparison to their first-generation counterparts, but long term success remains to be seen.

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.

In-Vitro Investigation of a Noninvasive Referencing Technology for Computer-Assisted Total Hip Arthroplasty

Orthopedics ◽  
2010 ◽  
Author(s):  
Tobias Renkawitz ◽  
Sabine Gneiting ◽  
Jens Schaumburger ◽  
Michael Woerner ◽  
Hans-Robert Springorum ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Computer Assisted ◽  
Total Hip ◽  
In Vitro Investigation

Cement mantle thickness does not influence serum or local gentamicin concentrations in hybrid total hip arthroplasty: a randomised controlled trial

2018 ◽  
Vol 28 (4) ◽  
pp. 415-421 ◽  
Author(s):  
Willem van IJperen ◽  
Damien Van Quickenborne ◽  
Ronald Buyl ◽  
Thierry Scheerlinck
Keyword(s):  
Total Hip Arthroplasty ◽  
Bone Cement ◽  
Hip Arthroplasty ◽  
Controlled Trial ◽  
Cement Mantle ◽  
Total Hip ◽  
Drain Fluid ◽  
Randomised Controlled ◽  
Mantle Thickness

Introduction: We investigated the in vivo gentamicin elution kinetics of Hi-Fatigue Gentamicin Bone Cement (AAP Biomaterials GmbH) in serum and drain fluid after hybrid hip arthroplasty and the relationship with cement mantle thickness. Methods: We compared in a randomised, non-blinded prospective study, the local and systemic gentamicin concentrations in 2 groups. The thin cement mantle group ( n = 16) received a stem implanted line-to-line with the broach, whereas the thick group ( n = 14) had an undersized stem. Gentamicin concentrations were measured in drain fluid and serum at set intervals for 3 days postoperatively. Results: In both groups, local gentamicin concentrations were similar. After a high initial burst above the minimal inhibitory concentration (thin: 57.2 mg/L (SD 34.4), thick: 54.9 mg/L (SD 19.9), p = 0.823) local gentamicin concentrations declined rapidly. In both groups, serum concentrations never exceeded toxic levels (maximum 1.08 mg/L). Conclusion: In hybrid total hip arthroplasty, Hi-Fatigue Gentamicin Bone Cement resulted in effective and safe gentamicin concentrations. Clinical trial protocol number: PMCI 12/02.

scholarly journals In vivo kinematics, component alignment and hardware variables influence on the liner-to-neck clearance during chair-rising after total hip arthroplasty

2020 ◽  
Vol 25 (3) ◽  
pp. 452-459 ◽  
Author(s):  
Kyohei Shiomoto ◽  
Satoshi Hamai ◽  
Daisuke Hara ◽  
Hidehiko Higaki ◽  
Hirotaka Gondo ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Component Alignment ◽  
Total Hip ◽  
In Vivo Kinematics
Sign in / Sign up

Export Citation Format

Share Document