[Morphologic analysis of Japanese adult sacroiliac joint using computed tomographic images].
OBJECTIVE
To study the relationship of angles in adult sacroiliac joints (SJ) with laterality, age, gender, degeneration, childbearing in different locations.


METHODS
The study was performed in 92 healthy Japanese adult volunteers (46 males and 46 females, aged 21 approximately 86 years) who had no low back complaints. Axial computed tomographic (CT) images were obtained using an X-VIGOR apparatus (Toshiba Medical Inc. Japan). The angle measurements were taken directly using soft NIH Image 1.61 (Scion Inc. USA). We examined possible factors. Statistical evaluation was calculated using t-test by soft SPSS (SPSS Inc. Japan).


RESULTS
Our findings indicated that SJ angles had no relationships with laterality, gender. But from upper part to lower part, the average of SJ angle was 7.61 degrees +/-8.7 degrees, 5.16 degrees +/-7.3 degrees, -0.85 degrees +/-7.3 degrees respectively in the left and 6.56 degrees +/-9.4 degrees, 4.10 degrees +/-7.2 degrees, -2.30 degrees +/-7.0 degrees in the right. The difference is significant between lower part and upper-middle part (P<0.05).


CONCLUSIONS
Our results provided new anatomic and morphological data for better understandings of SJ in the clinic work.
Department of Orthopaedic Surgery, Nippon Medical School, Japan. panxuanchao@nms.ac.jp
Xuanchao
X
Pan
Akinori
A
Takayama
Yasuaki
Y
Shibata
Hiromoto
H
Ito
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012446:Sacroiliac Joint / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed