Validation of a Simple, Laser-Guided System for Prescribing Acetabular Cup Inclination Angle in Total Hip Arthroplasty

2009 ◽  
Author(s):  
Jennifer Peter ◽  
Jovauna M. Currey ◽  
Meir Marmor ◽  
Jenni M. Buckley ◽  
William McGann
Keyword(s):  
Clinical Trials ◽  
Total Hip Arthroplasty ◽  
Inclination Angle ◽  
Hip Arthroplasty ◽  
Navigation Systems ◽  
Acetabular Cup ◽  
Steep Learning Curve ◽  
Total Hip ◽  
Acetabular Orientation ◽  
Accuracy And Repeatability

In total hip arthroplasty (THR) cases, it can be technically challenging to achieve the correct inclination angle for the acetabular component. Commercial intra-operative navigation systems have been successfully used to precisely guide acetabular orientation [1]; however, these systems are costly, time consuming, and have a steep learning curve for new users [2]. In an effort to simplify the procedure, McGann et al. have developed a laser-guided system to address the inclination angle [3]. In preliminary clinical trials, this system has been used successfully, but its accuracy and repeatability have never been quantified.

scholarly journals An accelerometer-based navigation system provides acetabular cup orientation accuracy comparable to that of computed tomography-based navigation during total hip arthroplasty in the supine position

2019 ◽  
Author(s):  
Tomonori Tetsunaga ◽  
Kazuki Yamada ◽  
Tomoko Tetsunaga ◽  
Tomoaki Sanki ◽  
Yoshi Kawamura ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Supine Position ◽  
Polyethylene Wear ◽  
Anterolateral Approach ◽  
Navigation Systems ◽  
Acetabular Cup ◽  
Total Hip ◽  
Significant Difference

Abstract Background: Inadequate acetabular component orientation is associated with postoperative impingement, dislocation, and accelerated polyethylene wear. Computed tomography (CT)-based navigation systems provide accuracy for total hip arthroplasty (THA) but are not available in all facilities. Accelerometer-based navigation systems are inexpensive, but their accuracy remains undetermined. This study compares the accuracy of cup orientation in THA using CT-based and accelerometer-based navigation systems. Methods: This retrospective study included 35 consecutive patients (11 males, 24 females; mean age, 65 years) who underwent primary cementless THA via an anterolateral approach in the supine position. Both CT-based and accelerometer-based navigation systems were used simultaneously. The accuracy of cup orientation was compared between the two systems using postoperative CT. Results: The accuracy of cup inclination was 2.7° ± 2.0° in the CT-based group and 3.3° ± 2.4° in the accelerometer-based group. The accuracy of cup anteversion was 2.8° ± 2.6° in the CT-based group and 3.4° ± 2.2° in the accelerometer-based group. No significant difference was observed in cup inclination ( p = 0.29) or cup anteversion ( p = 0.34) between CT-based and accelerometer-based navigation. Conclusions: The accuracy of cup positioning did not differ significantly between CT-based and accelerometer-based navigation systems.

scholarly journals Hammering Sound Frequency Analysis to Fix an Acetabular Cup during Total Hip Arthroplasty: Clinical Trials and Biomechanical Studies

2021 ◽  
Vol 14 (01) ◽  
pp. 14-20
Author(s):  
Rina Sakai ◽  
Katsufumi Uchiyama ◽  
Kensuke Fukushima ◽  
Naonobu Takahira ◽  
Kazihiro Yoshida ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Total Hip Arthroplasty ◽  
Frequency Analysis ◽  
Hip Arthroplasty ◽  
Sound Frequency ◽  
Acetabular Cup ◽  
Total Hip

scholarly journals Lack of consensus on optimal acetabular cup orientation because of variation in assessment methods in total hip arthroplasty: a systematic review

2018 ◽  
Vol 29 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Thom E Snijders ◽  
Koen Willemsen ◽  
Steven M van Gaalen ◽  
Rene M Castelein ◽  
Harrie Weinans ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Well Being ◽  
Assessment Methods ◽  
Reference Plane ◽  
Navigation Systems ◽  
Acetabular Cup ◽  
Postoperative Evaluation ◽  
Total Hip ◽  
The Past

Introduction: Dislocation is 1 of the main reasons for revision of total hip arthroplasty but dislocation rates have not changed in the past decades, compromising patients’ well-being. Acetabular cup orientation plays a key role in implant stability and has been widely studied. This article investigates whether there is a consensus on optimal cup orientation, which is necessary when using a navigation system. Methods: A systematic search of the literature in the PubMed, Embase and Cochrane databases was performed (March 2017) to identify articles that investigated the direct relationship between cup orientation and dislocation, including a thorough evaluation of postoperative cup orientation assessment methods. Results: 28 relevant articles evaluating a direct relation between dislocation and cup orientation could not come to a consensus. The key reason is a lack of uniformity in the assessment of cup orientation. Cup orientation is assessed with different imaging modalities, different methodologies, different definitions for inclination and anteversion, several reference planes and distinct patient positions. Conclusions: All available studies lack uniformity in cup orientation assessment; therefore it is impossible to reach consensus on optimal cup orientation. Using navigation systems for placement of the cup is inevitably flawed when using different definitions in the preoperative planning, peroperative placement and postoperative evaluation. Further methodological development is required to assess cup orientation. Consequently, the postoperative assessment should be uniform, thus differentiating between anterior and posterior dislocation, use the same definitions for inclination and anteversion with the same reference plane and with the patient in the same position.

Model studies on acetabular component migration in total hip arthroplasty using CT and a semiautomated program for volume merging

2003 ◽  
Vol 44 (4) ◽  
pp. 419-429 ◽  
Author(s):  
L. Olivecrona ◽  
H. Olivecrona ◽  
L. Weidenhielm ◽  
M. E. Noz ◽  
G. Q. Maguire ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Absolute Error ◽  
Acetabular Cup ◽  
Total Hip ◽  
Model Studies ◽  
Non Invasive ◽  
Specificity And Sensitivity ◽  
The Mean ◽  
Accuracy And Repeatability

Purpose: Validation of a non-invasive CT method for detection of acetabular cup migration after total hip arthroplasty in a phantom study. Material and Methods: 26 CT examinations were obtained of a pelvic model while altering the position of the acetabular cup. Using a previously described program for volume merging, the pelvi in different examinations were fused and the 3D alterations of the position of the acetabular cup were evaluated visually and numerically and correlated to direct measurements on the model. Results: Visually, two independent examiners differentiated between 0, 1 and 2 to 3 mm migration with 100% specificity and sensitivity. Numerically, the mean error over all cases between model and CT measurements was 0.04 mm (SD ± 0.33). The mean absolute error between model and CT data was 0.26 mm (SD ± 0.19). Intra- and interobserver 95% accuracy and repeatability limits were below 0.5/0.7 mm, respectively. No significant interobserver difference occurred. The data were normally distributed and not dependent on observer. Conclusion: The accuracy of this non-invasive method out-performs routine plain radiography. The method gives both visual and numerical correlates to migration and can be used in clinical practice.

CT-based automated planning of acetabular cup for total hip arthroplasty (THA) based on hybrid use of two statistical atlases

2016 ◽  
Vol 11 (12) ◽  
pp. 2253-2271 ◽  
Author(s):  
Yoshiyuki Kagiyama ◽  
Itaru Otomaru ◽  
Masaki Takao ◽  
Nobuhiko Sugano ◽  
Masahiko Nakamoto ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Automated Planning ◽  
Acetabular Cup ◽  
Total Hip

Assessment of an Orthopaedic Templating Software Package for Uncemented Total Hip Arthroplasty

2020 ◽  
Vol 4 (04) ◽  
pp. 155-157
Author(s):  
Michael Newman ◽  
David Hartwright
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Acetabular Cup ◽  
Total Hip ◽  
Pelvic Radiograph ◽  
Uncemented Total Hip Arthroplasty ◽  
Femoral Stems ◽  
Hip Arthroplasties ◽  
Acetabular Components ◽  
Insight Into

AbstractThe aim of this study was to assess a large, single-surgeon dataset of uncemented total hip arthroplasties that had been templated using software. This assessment compared preoperative templated predictions with what was implanted with regard to (1) femoral prosthesis size and (2) acetabular cup size. The operation notes for two types of uncemented total hip arthroplasty performed by a single surgeon between January 9, 2008, and March 21, 2019, were assessed. The data were refined so that only those that were fully templated on a correctly calibrated pelvic radiograph were included. This provided a total of 153 cases. The predicted software template was compared with actual implanted component sizes. With regard to the femoral stems, the templating software was exactly correct in 45.75% of cases and was accurate to within one size in 87.59% of cases. With regard to the acetabular component, the templating software was exactly correct in 52.94% of cases and was accurate to within one size (2 mm) in 86.94% of cases. Templating software offers an accurate prediction of the size of uncemented femoral and acetabular components. In addition, the benefits of templating include cognitive rehearsal, insight into potentially challenging aspects of surgery, and highlighting intraoperative issues where there is a large intraoperative deviation from what is templated. This study demonstrates the congruence and reproducibility of templating software when compared with other smaller studies performed in the literature.

scholarly journals Compression of the Femoral Vessels by a Pseudotumor after Metal-on-Metal Total Hip Arthroplasty

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Yasuaki Tamaki ◽  
Tomohiro Goto ◽  
Takahiko Tsutsui ◽  
Tomoya Takasago ◽  
Keizo Wada ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Vascular Compression ◽  
Acetabular Cup ◽  
Primary Metal ◽  
Total Hip ◽  
Circulatory Disturbance ◽  
Metal Head ◽  
Metal On Metal ◽  
Femoral Vessels

Here we present a case of pseudotumor following total hip arthroplasty (THA) that resulted in a circulatory disturbance caused by compression of the femoral vasculature. A 63-year-old man presented with pain, swelling, and redness of the left leg 5 years after primary metal-on-metal THA using the AML-Plus stem, Pinnacle® acetabular cup, and 36 mm diameter Ultamet™ metal head system (DePuy Orthopaedics, Warsaw, IN). Enhanced computed tomography and magnetic resonance imaging revealed a large cystic lesion extending from the left hip anteriorly to the intrapelvic region and compressing the left femoral vessels. Percutaneous puncture of the lesion yielded a dark red aspirate and the patient was diagnosed to have a pseudotumor causing compression of the femoral vessels. We performed revision surgery to replace the metal head and metal liner with a smaller ceramic head and polyethylene liner without removal of the stem. Corrosion of the head-neck junction was identified intraoperatively with no obvious wear on the bearing surfaces. The left leg swelling and redness improved immediately postoperatively. A large pseudotumor should be kept in mind as a cause of vascular compression with unilateral leg edema in a patient who has undergone metal-on-metal THA.

Failure Mode of Polyethylene Liner in Total Hip Arthroplasty with Harris-Galante II Acetabular Cup

2004 ◽  
Vol 39 (7) ◽  
pp. 766
Author(s):  
Byung Woo Min ◽  
Ki Cheol Bae ◽  
Kyung Jae Lee ◽  
Sung Won Sohn ◽  
Chul Hyung Kang
Keyword(s):  
Total Hip Arthroplasty ◽  
Failure Mode ◽  
Hip Arthroplasty ◽  
Polyethylene Liner ◽  
Acetabular Cup ◽  
Total Hip
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