Correction to: Qualitative and quantitative analysis of glenoid bone stock and glenoid version: inter-reader analysis and correlation with rotator cuff tendinopathy and atrophy in patients with shoulder osteoarthritis

Siebert, Matthew; Chalian, Majid; Sharifi, Arghavan; Pezeshk, Parham; Xi, Yin; Lawson, Parker; Chhabra, Avneesh

doi:10.1007/s00256-020-03386-z

Cited by 5 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 2 , 24 Increased retroversion/anteversion has also been described as a possible influencing factor. 2 , 20 Whereas fatty infiltration of the subscapularis muscle leads to arthritis with anterior subluxation, 18 progression of OA can lead to degeneration of all muscles of the RC, culminating in fatty infiltration and dysfunction. 3 Although not yet fully understood, it can be said that to some extent eccentric OA of the glenohumeral joint is, akin to CTA, a disease associated with RC insufficiency.…”

Section: Discussionmentioning

confidence: 99%

“…This reconstruction has previously been described as the scapular plane. 11 , 12 , 18 To ascertain the glenoid center, the midpoint was defined in the cross-sectional and coronal planes, disregarding osteophytes. The scapular axis was defined as a line passing through the scapular trigonum and glenoid center, in corroboration with previous work 11 , 12 , 18 ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

“… 11 , 12 , 18 To ascertain the glenoid center, the midpoint was defined in the cross-sectional and coronal planes, disregarding osteophytes. The scapular axis was defined as a line passing through the scapular trigonum and glenoid center, in corroboration with previous work 11 , 12 , 18 ( Figure 1 ). Placing a best-fit circle on the humeral head that followed the articular surface (where intact) and reliably intersected preserved extra-articular landmarks at the borders of the articular surface allowed an accurate determination of the center of rotation and size of the humeral head.…”

Section: Methodsmentioning

confidence: 99%

“…Several studies have since investigated the glenoid wear patterns in DAS in great detail and have found a combined eccentricity of the erosion sites. 1 , 5 , 9 , 13 , 17 – 19 , 22 Biplanar eccentricity in shoulder arthritis has also been documented in terms of humeroscapular alignment (HSA); Jacxsens et al 11 showed, on average, a posteroinferior alignment in cases classified as Walch type B1. However, there are little data regarding HSA in 3 dimensions in DAS.…”

mentioning

confidence: 99%

See 3 more Smart Citations

A 3-Dimensional Classification for Degenerative Glenohumeral Arthritis Based on Humeroscapular Alignment

Kleim

Hinz

Geyer

et al. 2022

Orthopaedic Journal of Sports Medicine

View full text Add to dashboard Cite

Background: Seminal classifications of degenerative arthritis of the shoulder (DAS) describe either cuff tear arthropathy in the coronal plane or primary osteoarthritis in the cross-sectional plane. None consider a biplanar eccentricity. Purpose/Hypothesis: The purpose of this study was to investigate humeroscapular alignment (HSA) of patients with DAS in both the anteroposterior (A-P) and superoinferior (S-I) planes on computed tomography (CT) after 3-dimensional (3D) reconstruction and develop a classification based on biplanar HSA in 9 quadrants. It was hypothesized that biplanar eccentricity would occur frequently. Study Design: Cross-sectional study; Level of evidence, 3. Methods: The authors analyzed 130 CT scans of patients who had undergone shoulder arthroplasty. The glenoid center, trigonum, and inferior angle of the scapula were aligned in a single plane using 3D reconstruction software. Subluxation of the HSA was measured as the distance from the center of rotation of the humeral head to the scapular axis (line from trigonum through glenoid center) and was expressed as a percentage of the radius of the humeral head in both the A-P and the S-I directions. HSA was described in terms of A-P alignment first (posterior/central/anterior), then S-I alignment (superior/central/inferior), for a total of 9 different alignment combinations. Additionally, glenoid erosion was graded 1-3. Results: Subluxation of the HSA was 74.1% posterior to 23.5% anterior in the A-P direction and 17.2% inferior to 68.6% superior in the S-I direction. A central HSA was calculated as between 20% posterior to 5% anterior (A-P) and 5% inferior to 20% superior (S-I), after a graphical analysis. Posterior subluxation >60% of the radius was labeled as extraposterior, and static acetabularization was labeled as extrasuperior. Overall, 21 patients had central-central, 40 centrosuperior, and 1 centroinferior alignment. Of 60 shoulders with posterior subluxation, alignment was posterocentral in 31, posterosuperior in 25, and posteroinferior in 5. There were 3 patients with anterocentral and 4 anterosuperior subluxation; in addition, 4 cases with extraposterior and 17 with extrasuperior subluxation were identified. Conclusion: There was a high prevalence of biplanar eccentricity in DAS. The 3D classification system using combined HSA and glenoid erosion can be applied to describe DAS comprehensively.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

A 3-Dimensional Classification for Degenerative Glenohumeral Arthritis Based on Humeroscapular Alignment

Kleim

Hinz

Geyer

et al. 2022

Orthopaedic Journal of Sports Medicine

View full text Add to dashboard Cite

show abstract

“…In recent years, however, several authors described biplanar eccentricity in glenoid erosion patterns [6][7][8][9][10]. OA patients often develop rotator cuff insufficiency as the disease progresses, or the disease may initially be influenced by rotator cuff degeneration [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Validation of a novel 3-dimensional classification for degenerative arthritis of the shoulder

Kleim,

Lappen,

Kadantsev

et al. 2023

Arch Orthop Trauma Surg

View full text Add to dashboard Cite

Introduction A novel three-dimensional classification to comprehensively describe degenerative arthritis of the shoulder (DAS) was recently published by our group. The purpose of the present work was to investigate intra- and interobserver agreement as well as validity for the three-dimensional classification. Materials and methods Preoperative computed tomography (CT) scans of 100 patients who had undergone shoulder arthroplasty for DAS were randomly selected. Four observers independently classified the CT scans twice, with an interval of 4 weeks, after prior three-dimensional reconstruction of the scapula plane using a clinical image viewing software. Shoulders were classified according to biplanar humeroscapular alignment as posterior, centered or anterior (> 20% posterior, centered, > 5% anterior subluxation of humeral head radius) and superior, centered or inferior (> 5% inferior, centered, > 20% superior subluxation of humeral head radius). Glenoid erosion was graded 1–3. Gold-standard values based on precise measurements from the primary study were used for validity calculations. Observers timed themselves during classification. Cohen’s weighted κ was employed for agreement analysis. Results Intraobserver agreement was substantial (κ = 0.71). Interobserver agreement was moderate with a mean κ of 0.46. When the additional descriptors extra-posterior and extra-superior were included, agreement did not change substantially (κ = 0.44). When agreement for biplanar alignment alone was analyzed, κ was 0.55. The validity analysis reached moderate agreement (κ = 0.48). Observers took on average 2 min and 47 s (range 45 s to 4 min and 1 s) per CT for classification. Conclusions The three-dimensional classification for DAS is valid. Despite being more comprehensive, the classification shows intra- and interobserver agreement comparable to previously established classifications for DAS. Being quantifiable, this has potential for improvement with automated algorithm-based software analysis in the future. The classification can be applied in under 5 min and thus can be used in clinical practice.

show abstract

Glenoid Version Assessment When the CT Field of View Does Not Permit the Friedman Method: The Robertson Method

Robertson

Sharma

McMahon

et al. 2022

Orthopaedic Journal of Sports Medicine

View full text Add to dashboard Cite

Background: To improve spatial resolution, current clinical shoulder cross-sectional imaging studies reduce the field of view of the shoulder, excluding the medial scapula border and preventing glenoid version measurement according to the Friedman method. Purpose: To evaluate a method to accurately and reliably measure glenoid version on cross-sectional shoulder images when the medial scapula border is not included in the field of view, and to establish measurements equivalent to the Friedman method. Study Design: Controlled laboratory study. Methods: Sixty-five scapulae underwent computed tomography (CT) scanning with an optimal shoulder CT-positioning protocol. Glenoid version was measured on CT images of the full scapula using the Friedman method. We developed a measurement method (named the Robertson method) based on the glenoid vault version from partial scapula images, with a correction angle subtracted from the articular-surface-glenoid vault measurement. Comparison with the Friedman method defined the accuracy of the Robertson method. Three observers tested inter- and intraobserver reliability of the Robertson method. Accuracy was statistically evaluated with t tests and reliability with the intraclass correlation coefficient (ICC). Results: The statistical distribution of glenoid version was similar to published data,–0.5° ± 3° [mean ± SD]. The initial measurement using the Robertson method resulted in a more retroverted angle compared with the Friedman method, and a correction angle of 7° was then applied. After this adjustment, the difference between the 2 methods was nonsignificant (0.1° ± 4°; P > .65). Reliability of the Robertson method was excellent, as the interrater ICC was 0.77, the standard error of measurement (SEM) was 1.1° with P < .001. The intrarater ICC ranged between 0.84 and 0.92, the SEM ranged between 0.9° and 1.2° with P < .01. Conclusion: A validated glenoid version measurement method is now available for current clinical shoulder CT protocols that reliably create Friedman-equivalent values. Clinical Relevance: Friedman-equivalent values may be made from common clinical CTs of the shoulder and compared with prior and future Friedman measurements of the scapula.

show abstract

Correction to: Qualitative and quantitative analysis of glenoid bone stock and glenoid version: inter-reader analysis and correlation with rotator cuff tendinopathy and atrophy in patients with shoulder osteoarthritis

Cited by 5 publications

References 24 publications

A 3-Dimensional Classification for Degenerative Glenohumeral Arthritis Based on Humeroscapular Alignment

A 3-Dimensional Classification for Degenerative Glenohumeral Arthritis Based on Humeroscapular Alignment

Validation of a novel 3-dimensional classification for degenerative arthritis of the shoulder

Glenoid Version Assessment When the CT Field of View Does Not Permit the Friedman Method: The Robertson Method

Contact Info

Product

Resources

About