Analysis on the acromial curvature and its relationships with the subacromial space and types of acromion

Aragão, José Aderval; Silva, Leonardo Passos; Reis, Francisco Prado; Menezes, Camilla Sá dos Santos

doi:10.1016/j.rboe.2013.10.005

Acessibilidade / Reportar erro

Brasil

Revista Brasileira de Ortopedia

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Original Articles • Rev. bras. ortop. 49 (6) • Nov-Dec 2014 • https://doi.org/10.1016/j.rboe.2013.10.005 copy

Analysis on the acromial curvature and its relationships with the subacromial space and types of acromion^☆ ☆ Please cite this article as: Aragão JA, Silva LP, Reis FP, dos Santos Menezes CS. Análise da curvatura acromial e sua relação com o espaçosubacromial e os tipos de acrômio. Rev Bras Ortop. 2014;49:636–641. ,^☆☆ ☆☆ Study was developed at Departments of Human Anatomy of the Federal University of Sergipe (UFS) and Tiradentes University (UNIT), Aracaju, SE, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

Objective:

To correlate the acromial curvature, using the angles proposed, with the subacromial space and types of acromion.

Methods:

Ninety scapulas were studied. The acromia were classified as types I, II or III. The acromial curvature was analyzed by means of the alpha, beta and theta angles. We also measured the distance between the anteroinferior extremity of the acromion and the supraglenoid tubercle (DA). The scapulas were grouped in relation to sex and age. The angles proposed were analyzed in relation to each type of acromion and also in relation to the measurements of the distance DA.

Results:

Out of the total number of acromia, 39 (43.3%) were type I, 43 (47.7%) type II and eight (9%) type III. The mean ages for each type of acromion (I-III) were 45.6, 55.2 and 51.1 years, respectively. The proportions of the different types of acromion varied in relation to sex and age. The evaluations on the mean beta angle (p = 0.008) and theta angle (p = 0.028), with comparisons in relation to each type of acromion and measurements of the distance DA (p = 0.037), were shown to be statistically significant.

Conclusion:

The angles proposed in our study can be used for morphometric analysis on the acromion, especially regarding its curvature, and can contribute towards studies on diseases of the shoulder and aid in surgical planning and analysis of the acromial slope, by means of radiography or magnetic resonance.

Acromion/anatomy & histology; Shoulder collision syndrome; Rotator cuff

Sex		Type I	Type II	Type III
Female (n = 36)		20 (55.5%)	10 (27.7%)	6 (16.8%)
	Right	10	5	3
	Left	10	5	3
Male (n = 54)		19 (35.1%)	33 (61.1%)	2 (3.8%)
	Right	11	15	1
	Left	8	18	1
Total (n = 90)		39 (43.3%)	43 (47.7%)	8 (9%)

Age		Type I	Type II	Type III
≤49 years (n = 40)		20 (50%)	15 (37.5%)	5 (12.5%)
	Male	9	10	1
	Female	11	5	4
≥50 years (n = 50)		19 (38%)	28 (56%)	3 (6%)
	Male	10	23	1
	Female	9	5	2

Type	Type I				Type II				Type III
Type	β	θ	α	DA	β	θ	α	DA	β	θ	α	DA
Mean	41.9	77.5	40.3	29.3	39.3	73.8	41.7	28.7	33.6	63.7	39.3	23.1
Median	40.4	74.7	38.9	29.0	40.0	75.3	40.9	27.5	35.1	64.5	37.8	23.7
Variance	23.0	79.5	73.6	19.9	17.0	75.5	67.8	14.6	47.0	193.0	57.9	37.8
SD	4.8	8.9	8.6	4.5	4.1	8.7	8.2	3.8	6.9	13.9	7.6	6.1
Minimum	33.4	59.5	22.8	21.0	30.4	51.6	28.8	22.6	24.1	49.8	32.2	16.3
Maximum	51.8	92.7	63.4	36.0	47.3	84.5	57.5	37.7	40.2	76.2	49.3	28.6

		Mean	Standard deviation	F	p-Value
β
	Type I	41.9	4.8	5.50	0.008
	Type II	39.3	4.1
	Type III	33.6	6.9
θ
	Type I	77.5	8.9	3.88	0.028
	Type II	73.8	8.7
	Type III	63.7	13.9
α
	Type I	40.3	8.6	0.21	0.810
	Type II	41.7	8.2
	Type III	39.3	7.6
Distance
	Type I	29.3	4.5	3.56	0.037
	Type II	28.7	3.8
	Type III	23.1	6.1

Sociedade Brasileira de Ortopedia e Traumatologia Al. Lorena, 427 14º andar, 01424-000 São Paulo - SP - Brasil, Tel.: 55 11 2137-5400 - São Paulo - SP - Brazil
E-mail: rbo@sbot.org.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author. E-mail: jaafelipe@infonet.com.br (J.A. Aragão).