Bone mineralization changes of the glenoid in shoulders with symptomatic rotator cuff tear
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Computed tomography osteoabsorptiometry (CTO) is a method to analyze the stress distribution in joints by measuring the subchondral bone density. The purpose of this study was to evaluate the bone mineralization changes of the glenoid in shoulders with rotator cuff tears by CTO and to evaluate whether rotator cuff tears are associated with stress changes in the glenoid.
In total, 32 patients, who were diagnosed with unilateral rotator cuff tears and underwent arthroscopic rotator cuff repair, were enrolled in this study. They underwent CT scanning of both shoulders pre-operatively and the glenoid was evaluated using CTO. Hounsfield units (HU) in seven areas of the glenoid were compared between the affected and unaffected sides.
The central area of the glenoid on the affected side had significantly lower HU than on the unaffected side among all patients. Focusing on the rotator cuff tear size and the subscapularis tendon, only patients with larger cuff tears or with subscapularis tendon tears showed significantly lower HU in the central area of the affected side.
This study showed a decrease in bone mineralization density in the central glenoid in shoulders with rotator cuff tear. This change was observed in the case of larger cuff tears and subscapularis tendon tears. Our results help clarify the changes in stress distribution in the shoulder joint caused by symptomatic rotator cuff tears.
KeywordsComputed tomography osteoabsorptiometry Rotator cuff tear Subchondral bone mineralization change Shoulder Glenoid
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
The institutional review board approved this study.
This article was approved by our Ethical Committee of Research.
Informed consent was obtained from all individual participants included in the study.
- 3.Burkhart SS (1991) Arthroscopic treatment of massive rotator cuff tears. Clinical results and biomechanical rationale. Clin Orthop Relat Res 267:45–56Google Scholar
- 6.Dunn WR, Kuhn JE, Sanders R et al (2014) Symptoms of pain do not correlate with rotator cuff tear severity: a cross-sectional study of 393 patients with a symptomatic atraumatic full-thickness rotator cuff tear. J Bone Joint Surg Am 96:793–800. https://doi.org/10.2106/JBJS.L.01304 CrossRefPubMedPubMedCentralGoogle Scholar
- 9.Egloff C, Paul J, Pagenstert G, Vavken P, Hintermann B, Valderrabano V, Müller-Gerbl M (2014) Changes of density distribution of the subchondral bone plate after supramalleolar osteotomy for valgus ankle osteoarthritis. J Orthop Res 32:1356–1361. https://doi.org/10.1002/jor.22683 CrossRefPubMedGoogle Scholar
- 13.Yokoya S, Mochizuki Y, Omae H et al (2006) Analysis of stress distribution of glenoid with DMSB (distribution of mineralization of subchondral bone plate) by CT osteoabsorptiometry [in Japanese]. Katakansetsu 30:375–378. https://doi.org/10.11296/katakansetsu1977.30.3_375 CrossRefGoogle Scholar
- 16.Fleiss JL (1981) Statistical methods for rates and proportions. John Wiley & Sons, New YorkGoogle Scholar
- 20.Kawasaki T, Sashi R, Moriya S et al (2013) Computed tomography osteoabsorptiometry for assessing the density distribution of subchondral bone as a measure of long-term mechanical stress in the “rugby shoulder”. J Shoulder Elb Surg 22:800–806. https://doi.org/10.1016/j.jse.2012.07.015 CrossRefGoogle Scholar