Effect of Pelvic Tilt on Radiographic Migration and Wear Measurements after Total Hip Arthroplasty

1998 ◽  
Vol 8 (1) ◽  
pp. 16-23 ◽  
Author(s):  
T. Ilchmann ◽  
U. Kesteris ◽  
H. Wingstrand
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Pelvic Tilt ◽  
Three Dimensional ◽  
Maximum Error ◽  
Total Hip ◽  
Radiographic Measurements ◽  
Accuracy Of Measurements ◽  
Set Up ◽  
Error Of Measurement

Tilt effects on radiographic measurements after total hip arthroplasty should be studied. A new computerized method for measurement, called EBRA, making three-dimensional calculations and intended to identify tilted radiographs was evaluated for its clinical usefulness. In an experimental set-up repeated radiographs were taken with a human pelvis tilted gradually around its horizontal and vertical axes. Migration and wear were measured with the EBRA method and the results were compared with those made using standard methods. Tilted radiographs were identified and excluded from analysis by the EBRA method, significantly reducing the maximum error of measurement. A systematic error of measurement was found in the presence of consecutively changing tilt in a single direction. Wear measurements were only slightly affected by pelvic tilt. A pelvic tilt can cause considerable errors in the measurement of cup migration-i.e. up to 8.2 mm. The EBRA method improves the accuracy of measurements by taking the effects of tilt into account.

Degenerative Lumbar Spine Disease, Not Fusion, May Be a Risk Factor for Instability after Total Hip Arthroplasty

2020 ◽  
Vol 4 (04) ◽  
pp. 193-200
Author(s):  
Daniel K. Witmer ◽  
Evan R. Deckard ◽  
R. Michael Meneghini
Keyword(s):  
Lumbar Spine ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Spine Fusion ◽  
Joint Disease ◽  
Total Hip ◽  
Female Sex ◽  
Lumbar Spine Fusion ◽  
Radiographic Measurements ◽  
Acetabular Protrusio

AbstractDislocation rates after total hip arthroplasty (THA) in patients with fixed spinopelvic motion have been reported as high as 20%. Few studies exist specifically for lumbar spine degenerative joint disease (DJD) and its relationship to THA instability. There were two study objectives: (1) report the incidence of lumbar spine DJD and previous lumbar spine fusion and (2) evaluate the relationship of these two conditions and other potential risk factors to postoperative dislocation after THA. We retrospectively reviewed 818 consecutive THAs performed by a single surgeon utilizing a posterior approach. Comprehensive medical chart and radiographic review was performed to identify patients with lumbar spine DJD and lumbar spine fusion. Radiographic measurements, patient factors, surgical factors, and incidences of dislocation also were recorded. Eight hundred and twelve THAs were analyzed. There were 10 dislocations (1.2%, 10/812). Lumbar spine DJD and previous lumbar spine fusion occurred in 33.4% (271/812) and 5.9% (48/812) of patients, respectively. Lumbar spine DJD, acetabular protrusio, and female sex were significant predictors of dislocation using a Firth penalized maximum likelihood estimation specifically for rare events (area under receiver-operator characteristic curve = 0.91, 95% confidence interval 0.86, 0.96). Interestingly, only 2 of 10 dislocations had a previous lumbar spine fusion. Lumbar spine DJD, acetabular protrusio, and female sex were significant predictors of dislocation, while lumbar spine fusion was largely unrelated. This study used data available to most practicing surgeons and provides useful information for counseling patients preoperatively.

scholarly journals Pelvic Tilt in Patients Undergoing Total Hip Arthroplasty: When Does it Matter?

2015 ◽  
Vol 30 (3) ◽  
pp. 387-391 ◽  
Author(s):  
Joseph D. Maratt ◽  
Christina I. Esposito ◽  
Alexander S. McLawhorn ◽  
Seth A. Jerabek ◽  
Douglas E. Padgett ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Pelvic Tilt ◽  
Total Hip

Effects of posterior pelvic tilt on anterior instability in total hip arthroplasty: A parametric experimental modeling evaluation

2013 ◽  
Vol 28 (2) ◽  
pp. 178-181 ◽  
Author(s):  
Taishi Sato ◽  
Yasuharu Nakashima ◽  
Akinobu Matsushita ◽  
Masanori Fujii ◽  
Yukihide Iwamoto
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Pelvic Tilt ◽  
Experimental Modeling ◽  
Anterior Instability ◽  
Total Hip

Three‐dimensional kinematic analysis of dislocation mechanism in dual mobility total hip arthroplasty constructs

2020 ◽  
Author(s):  
Christian Klemt ◽  
Georges Bounajem ◽  
Venkatsaiakhil Tirumala ◽  
Liang Xiong ◽  
Anand Padmanabha ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Kinematic Analysis ◽  
Three Dimensional ◽  
Dislocation Mechanism ◽  
Dual Mobility ◽  
Total Hip

scholarly journals 3D Printed Acetabular Cups for Total Hip Arthroplasty: A Review Article

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 729 ◽  
Author(s):  
Dall’Ava ◽  
Hothi ◽  
Di Laura ◽  
Henckel ◽  
Hart
Keyword(s):  
3D Printing ◽  
Total Hip Arthroplasty ◽  
Clinical Outcomes ◽  
Hip Arthroplasty ◽  
Three Dimensional ◽  
Total Hip ◽  
3D Printed ◽  
Key Variables ◽  
End Use ◽  
Acetabular Components

Three-dimensional (3D) printed titanium orthopaedic implants have recently revolutionized the treatment of massive bone defects in the pelvis, and we are on the verge of a change from conventional to 3D printed manufacture for the mass production of millions of off-the-shelf (non-personalized) implants. The process of 3D printing has many adjustable variables, which taken together with the possible variation in designs that can be printed, has created even more possible variables in the final product that must be understood if we are to predict the performance and safety of 3D printed implants. We critically reviewed the clinical use of 3D printing in orthopaedics, focusing on cementless acetabular components used in total hip arthroplasty. We defined the clinical and engineering rationale of 3D printed acetabular cups, summarized the key variables involved in the manufacturing process that influence the properties of the final parts, together with the main limitations of this technology, and created a classification according to end-use application to help explain the controversial and topical issues. Whilst early clinical outcomes related to 3D printed cups have been promising, in-depth robust investigations are needed, partly because regulatory approval systems have not fully adapted to the change in technology. Analysis of both pristine and retrieved cups, together with long-term clinical outcomes, will help the transition to 3D printing to be managed safely.

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