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Predetermining glenoid dimensions using the scapular dimensions

  • Original Article • SHOULDER - ARTHROPLASTY
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European Journal of Orthopaedic Surgery & Traumatology Aims and scope Submit manuscript

Abstract

Background

Variations of morphology of the glenoid cavity have been previously reported. These influence the surgical reconstruction or arthroplasty of the shoulder. This study aims to study the variation of the shape of suprascapular notch, shape of glenoid cavity, dimensions of both the scapular and the glenoid cavity, and predict the glenoid dimensions from the scapular dimension parameters.

Materials and methods

Adult-dried scapulae were collected. The shapes of each suprascapular notch and glenoid cavity were evaluated. The scapular height, scapular width, glenoid superoinferior distance, and glenoid anteroposterior distance were measured using a digital vernier caliper, and statistical analysis was conducted on the data that were obtained.

Results

There were 264 scapulae included in this study (166 male and 98 female). Most of the glenoid cavities were pear shaped (69.7%). The two most common types of suprascapular notches were small depression notches (31.8%) and the absence of notches (25.8%). The mean ± SD of scapular height, scapular width, glenoid superoinferior distance, and glenoid anteroposterior distance were 148.2 ± 10.0, 108.1 ± 6.4, 37.1 ± 2.2, and 27.4 ± 2.1 mm, respectively, in the male samples and 133.0 ± 7.0, 97.0 ± 5.2, 33.2 ± 1.9, and 23.7 ± 1.7 mm, respectively, in the female samples. The male scapulae were significantly larger than the female scapulae (p value < 0.05). However, there were no differences between the male and female scapulae in terms of scapular index or glenoid index (p value > 0.05). Scapular height and width were significantly associated with both the glenoid superoinferior distance (p = 0.0001) and glenoid anteroposterior distance (p value = 0.0001).

Conclusion

Scapular height and width can predict the dimensions of the glenoid. In cases of glenoid bone loss or shoulder arthroplasty, the native normal glenoid dimensions can be determined from the scapular dimensions as visualized using a true scapular anteroposterior radiograph. The surgeon can use these preoperative parameters when performing glenoid reconstruction or shoulder arthroplasty.

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Acknowledgements

The authors would like to thank the Department of Anatomy, Faculty of Medicine of Khon Kaen University for providing the human scapulae. The authors would also like to acknowledge Dr. Dylan Southard for his assistance with the English-language presentation of this manuscript.

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Authors and Affiliations

  1. Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand

    Wunnee Chaijaroonkhanarak, Pattama Amarttayakong, Somsiri Ratanasuwan, Wanassanan Pannangrong, Jariya Umka Welbat, Parichat Prachaney & Amnart Chaichun

  2. Department of Anatomy, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand

    Pornpimol Kirirat

  3. Center for Research and Development of Herbal Health Products, Khon Kaen University, Khon Kaen, Thailand

    Wanassanan Pannangrong & Jariya Umka Welbat

  4. Neuroscience Research and Development Group, Khon Kaen University, Khon Kaen, Thailand

    Jariya Umka Welbat

  5. Department of Orthopedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand

    Surachai Sae-Jung

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  1. Wunnee Chaijaroonkhanarak
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  2. Pattama Amarttayakong
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  3. Somsiri Ratanasuwan
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  9. Surachai Sae-Jung
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The authors participated in the design, execution, analysis, and writing up of the research.

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Correspondence to Surachai Sae-Jung.

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Chaijaroonkhanarak, W., Amarttayakong, P., Ratanasuwan, S. et al. Predetermining glenoid dimensions using the scapular dimensions. Eur J Orthop Surg Traumatol 29, 559–565 (2019). https://doi.org/10.1007/s00590-018-2313-9

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  • DOI: https://doi.org/10.1007/s00590-018-2313-9

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