Small anteroposterior inclination of the acromion is a predictor for posterior glenohumeral erosion (B2 or C)

Meyer, Dominik C.; Riedo, Sandro; Eckers, Franziska; Carpeggiani, Guilherme; Jentzsch, Thorsten; Gerber, Christian

doi:10.1016/j.jse.2018.05.041

Cited by 18 publications

(28 citation statements)

References 12 publications

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“…Moor BK suggested that individual quantitative anatomy may imply biomechanics that are likely to induce specific types of degenerative joint disorders 30 . Meyer DC found more horizontal acromial orientation in the sagittal plane and increased posterior glenoid version in osteoarthritis of the shoulder were associated with eccentric, posterior glenoid wear 31 . Regarding iatrogenic anatomical alterations, Flury MP reported that 91% of patients who underwent internal osteotomy of the humerus suffered severe shoulder osteoarthritis in the long term 9 .…”

Section: Discussionmentioning

confidence: 98%

Postoperative malrotation of humerus shaft fracture causes degeneration of rotator cuff and cartilage

Wang

Liu

et al. 2021

Sci Rep

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We hypothesized that postoperative malrotation of humeral shaft fractures can alter the bio-mechanical environment of the shoulder; thus, rotator cuff and cartilage degeneration could be induced. Therefore, we designed an animal experiment to evaluate the impact of malrotation deformities after minimally invasive surgery for humeral fractures on the rotator cuff and cartilage, which has rarely been described in previous studies. Twenty-four New Zealand white rabbits were randomly divided into the sham control group (A), negative control group (B) and malrotated group (C). A sham operation with surgical exposure alone was performed in group A. Humeral shaft osteotomy was performed in Group B and C. In Group B, the fractures were fixed in situ with plate -screw system. While in Group C, iatrogenic rotational deformity was created after the proximal end of the fracture being internally rotated by 20 degrees and then subsequently fixed. The animals with bone healing were sacrificed for pathological and biochemical examination. In group C, the modified Mankin scale for cartilage pathology evaluation and the modified Movin scale for tendon both showed highest score among groups with statistical significance (P < 0.05); Disordered alignment and proportion of collagen I/III of rotator cuff were confirmed with picrosirius red staining; Transmission electron microscopy also showed ultrastructural tendon damage. Immunohistochemistry showed that both MMP-1 and MMP-13 expression were significantly higher in group C than groups A and B(P < 0.05). Minimally invasive techniques for humerus shaft fracture might be cosmetically advantageous, but the consequent postoperative malrotation could increase the risk of rotator cuff and cartilage degeneration. This conclusion is supported here by primary evidence from animal experiments.

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Section: Discussionmentioning

confidence: 98%

Postoperative malrotation of humerus shaft fracture causes degeneration of rotator cuff and cartilage

Wang

Liu

et al. 2021

Sci Rep

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“…Previous research found an association between a more horizontal acromial orientation in the sagittal plane (high PAS), glenoid retroversion and eccentric glenoid erosion in patients with osteoarthritis 20 . We did not find a correlation between the glenoid erosions in RCTA patients and the acromial orientation in the sagittal plane.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 90%

“…Previous research already focused on the association of scapular anatomy with degenerative shoulder pathology 24 13 . Different scapular morphologic parameters have been investigated in terms of this association; more specifically the extension and tilting of the acromion in the coronal plane -defined by the critical shoulder angle (CSA) 21 and the lateral acromion angle (LAA) 3 respectively -as well as the acromial orientation in het sagittal plane -defined by the posterior acromial slope (PAS) 20 -and orientation of the glenoid in the axial and coronal planedefined by glenoid version and inclination. A large lateral extension (large CSA) and downsloping (smaller LAA) of the acromion in the coronal plane seems to be associated with degenerative rotator cuff failure 22 21 3 .…”

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confidence: 99%

Determination of pre-arthropathy scapular anatomy with a statistical shape model: part I—rotator cuff tear arthropathy

Verhaegen

Meynen

Matthews

et al. 2021

Journal of Shoulder and Elbow Surgery

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“… 65 This hypothesis was confirmed in a subsequent study by Meyer et al, reporting a median of 4 degrees more glenoid retroversion and a 5-degree less steep acromion in type B2 and C compared to type A and B1 glenoids (P ≤ 0.022). 66 …”

Section: Anatomic Total Shoulder Arthroplasty (Atsa)mentioning

confidence: 99%

Biomechanics of anatomic and reverse shoulder arthroplasty

et al. 2021

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The biomechanics of the shoulder relies on careful balancing between stability and mobility. A thorough understanding of normal and degenerative shoulder anatomy is necessary, as the goal of anatomic total shoulder arthroplasty is to reproduce premorbid shoulder kinematics. With reported joint reaction forces up to 2.4 times bodyweight, failure to restore anatomy and therefore provide a stable fulcrum will result in early implant failure secondary to glenoid loosening. The high variability of proximal humeral anatomy can be addressed with modular stems or stemless humeral components. The development of three-dimensional planning has led to a better understanding of the complex nature of glenoid bone deformity in eccentric osteoarthritis. The treatment of cuff tear arthropathy patients was revolutionized by the arrival of Grammont’s reverse shoulder arthroplasty. The initial design medialized the centre of rotation and distalized the humerus, allowing up to a 42% increase in the deltoid moment arm. More modern reverse designs have maintained the element of restored stability but sought a more anatomic postoperative position to minimize complications and maximize rotational range of motion. Cite this article: EFORT Open Rev 2021;6:918-931. DOI: 10.1302/2058-5241.6.210014

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Small anteroposterior inclination of the acromion is a predictor for posterior glenohumeral erosion (B2 or C)

Cited by 18 publications

References 12 publications

Postoperative malrotation of humerus shaft fracture causes degeneration of rotator cuff and cartilage

Postoperative malrotation of humerus shaft fracture causes degeneration of rotator cuff and cartilage

Determination of pre-arthropathy scapular anatomy with a statistical shape model: part I—rotator cuff tear arthropathy

Biomechanics of anatomic and reverse shoulder arthroplasty

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