Assessment of painful total shoulder arthroplasty using computed tomography arthrography

2015 ◽  
Vol 24 (10) ◽  
pp. 1507-1511 ◽  
Author(s):  
Gregory C. Mallo ◽  
Lauren Burton ◽  
Margaret Coats-Thomas ◽  
S. David Daniels ◽  
Nathan J. Sinz ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty

Sequential 3-dimensional computed tomography analysis of implant position following total shoulder arthroplasty

2018 ◽  
Vol 27 (6) ◽  
pp. 983-992 ◽  
Author(s):  
Eric T. Ricchetti ◽  
Bong-Jae Jun ◽  
Richard A. Cain ◽  
Ari Youderian ◽  
Eric J. Rodriguez ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Implant Position ◽  
3 Dimensional ◽  
Tomography Analysis

Sequential three-dimensional computed tomography analysis of implant position following total shoulder arthroplasty

2016 ◽  
Vol 25 (6) ◽  
pp. e168-e169
Author(s):  
Eric T. Ricchetti ◽  
Richard A. Cain ◽  
Bong-Jae Jun ◽  
Ari R. Youderian ◽  
Eric J. Rodriguez ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Three Dimensional ◽  
Implant Position ◽  
Tomography Analysis

scholarly journals The fulcrum axis: an accurate measure of glenoid version on radiographs and computed tomography

2017 ◽  
Vol 11 (2) ◽  
pp. 79-86
Author(s):  
Jennifer Mutch ◽  
Martin Sidler ◽  
Claudia Sidler-Maier ◽  
Terry Axelrod ◽  
Diane Nam
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Gold Standard ◽  
Total Shoulder Arthroplasty ◽  
Three Dimensional ◽  
Absolute Difference ◽  
Single Institution ◽  
Glenoid Version ◽  
Rater Reliability ◽  
The Mean

Background Proper glenoid position in total shoulder arthroplasty (TSA) is important. However, traditional glenoid version (GV) measurements overestimate retroversion on radiographs (XR) and computed tomography (CT). The fulcrum axis (FA) uses palpable surface landmarks and may be useful as an intra-operative guide. Also, the FA has not yet been validated on XR or CT in an arthritic population. Methods Four observers measured FA and GV on the XR, CT and three-dimensional CT (3DCT) of 40 patients who underwent TSA at a single institution from 2009 to 2015. Reliability and accuracy of FA and GV were calculated for XR and CT, using 3DCT as the gold standard. Results The mean FA and GV were 7.768° and 18.910° on XR; 6.23° and 12.920° on CT; and 8.100° and 7.740° on 3DCT, respectively. FA and GV were significantly different for XR and CT ( p < 0.001) but not for 3DCT ( p = 0.725). The inter-rater reliability, intra-rater reliability and accuracy of FA were not significantly different from GV and were 0.929 to 0.948, 0.779 to 0.974 and 0.674 to 0.705, respectively. However, the absolute difference of FA was closer to the gold standard (3DCT) than GV for XR (0.330° versus 11.172°) and CT (1.871° versus 5.178°) ( p < 0.001). Conclusions FA showed comparable reliability and accuracy to GV. However, FA more accurately reflected the gold standard.

Variability in total shoulder arthroplasty planning software compared to a control CT-derived 3D printed scapula

2019 ◽  
pp. 175857321988882
Author(s):  
Sarav S Shah ◽  
Shawn Sahota ◽  
Patrick J Denard ◽  
Matthew T Provencher ◽  
Bradford O Parsons ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Automated System ◽  
Glenoid Version ◽  
3D Computed Tomography ◽  
Planning Software ◽  
Computed Tomography Scans ◽  
3D Printed ◽  
Best Fit

Background Two techniques exist from which all 3D preoperative planning software for total shoulder arthroplasty are based. One technique is based on measurements constructed on the mid-glenoid and scapular landmarks (Landmark). The second is an automated system using a best-fit sphere technique (Automated). The purpose was to compare glenoid measurements from the two techniques against a control computed tomography-derived 3D printed scapula. Methods Computed tomography scans of osteoarthritic shoulders of 20 patients undergoing primary total shoulder arthroplasty were analyzed with both 3D planning software techniques. Measurements from a 3D printed scapula (Scapula) from the true 3D computed tomography scan served as controls. Glenoid version and inclination measurements from each group were blinded and reviewed. Results In 65% (Automated) and 45% (Landmark) of cases, either inclination or version varied by 5° or more versus 3D printed scapula. Significant variability in version differences compared to the scapula group existed (p = 0.007). Glenoid version from the Scapula = 13.0° ± 10.6°, Automated = 15.0° ± 13.9°, and Landmark = 12.2° ± 7.8°. Inclination from Scapula = 5.4° ± 7.9°, Automated = 6.1° ± 12.6°, and Landmark = 6.2° ± 9.1°. Discussion A high percentage of cases showed discrepancies in glenoid inclination and version values from both techniques. Surgeons should be aware that regardless of software technique, there is variability compared to measurements from a control 3D computed tomography printed scapula.

Trends and impact of three-dimensional preoperative imaging for anatomic total shoulder arthroplasty

2020 ◽  
pp. 175857322090886
Author(s):  
Jourdan M Cancienne ◽  
Ian J Dempsey ◽  
Grant E Garrigues ◽  
Brian J Cole ◽  
Stephen F Brockmeier ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Three Dimensional ◽  
Preoperative Imaging ◽  
Complication Rates ◽  
Resonance Imaging ◽  
Computed Tomography Imaging ◽  
Three Dimensional Imaging ◽  
Tomography Imaging

Background The goals of this study were to determine the incidence in the United States of preoperative three-dimensional imaging prior to anatomic total shoulder arthroplasty for osteoarthritis and to determine if preoperative imaging is associated with decreased complication rates. Methods Using a Medicare insurance database, we identified all patients who underwent computed tomography (n = 9380) and/or magnetic resonance imaging (n = 15,653) prior to anatomic total shoulder arthroplasty for a diagnosis of osteoarthritis from 2005 to 2014. The incidence of imaging over time was analyzed and complication rates compared between patients with imaging to matched controls. Results The incidence of preoperative three-dimensional imaging significantly increased over time, with computed tomography increasing more than magnetic resonance imaging. Compared to controls, patients with preoperative computed tomography imaging had significantly lower revision rates at two years (odds ratio 0.72 (0.64–0.82), p = 0.008). There were no other significant differences in the other complications studied. Conclusions The use of preoperative three-dimensional imaging for anatomic total shoulder arthroplasty for a diagnosis of osteoarthritis has increased dramatically, with the use of computed tomography increasing the most. Patients who underwent preoperative computed tomography imaging experienced lower revision rates at two years postoperatively compared to matched controls without such imaging. Level of evidence Level III, retrospective comparative study.

The role of acromial morphometry in the development of acromial stress fracture following reverse total shoulder arthroplasty

2020 ◽  
pp. 175857322090676
Author(s):  
Shawn T Yeazell ◽  
Ajith Malige ◽  
Timothy Visser ◽  
Gregory F Carolan
Keyword(s):  
Computed Tomography ◽  
Stress Fracture ◽  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Stress Fractures ◽  
Reverse Total Shoulder Arthroplasty ◽  
Fracture Cohort ◽  
Computed Tomography Scans ◽  
Reverse Total Shoulder

Background Indications for reverse total shoulder arthroplasty are expanding, and postoperative acromial stress fractures are a troubling postoperative complication. The purpose of this study was to determine if differences in acromial morphometry were present between cohorts with and without this complication. Methods A retrospective review of 101 reverse total shoulder arthroplasty procedures met criteria for the study. A total of eight acromial measurements on preoperative computed tomography scans were performed in axial, coronal, and sagittal views. Postoperative acromial stress fractures were confirmed by computed tomography scan on six patients and classified by fracture type. Statistical analysis was performed using a Mann–Whitney U test. Results The median acromial thickness at the posterior and lateral half was significantly thinner in the fracture cohort compared to the non-fracture cohort. Fracture and non-fracture cohort measurements demonstrated a median lateral thickness of 6.8 and 8.7 mm (p = 0.010), respectively, and median posterior thickness of 7.6 and 9.5 mm (p = 0.008), respectively. There were no demographic differences between cohorts. Discussion Two acromial measurements (lateral and posterior thickness) were associated with the development of postoperative acromial stress fracture following reverse total shoulder arthroplasty. These findings suggest that a thinner acromion in the lateral and posterior half is a risk factor for an acromial stress fracture following reverse total shoulder arthroplasty.

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