[Are sacrospinal and sacrotuberal ligaments involved in sacro-iliac joint stability?].
OBJECTIVE
Surgery of pudendal nerve entrapment needs the section of both sacrospinal and sacrotuberal ligaments. We asked about the potential side effect of such a section especially on sacro-iliac joint stability.


METHODS
We performed a cadaveric anatomical and biomechanical study concerning six sacro-iliac joints. Joints were tested on a plateform, and results were analysed with a logiciel (Medai((R))), both especially developped for, before and after sacrospinal and sacrotuberal section.


RESULTS
The computered analysis of our results proved that sacro-iliac joint has a significant range of motion, specially in youngs. Results obtained confirmed that there is no statistical difference (p<0.05) between the mobility of sacro-iliac joint with or without sacrospinal and sacrotuberal ligaments.


CONCLUSIONS
This original experimental biomechanical study is the first able to test the influence or sacrospinal and sacrotuberal section on sacro-iliac joint stability. The section of those ligaments has no significant experimental consequence on the sacro-iliac joint stability and cannot create a postoperative instability.
Philippeau
J-M
JM
Service de Chirurgie Orthopédique et Traumatologique, CHU de Nantes, Nantes, France. jmphilippeau@hotmail.com
Hamel
O
O
Pecot
J
J
Robert
R
R
D000368:Aged; D001696:Biomechanical Phenomena; D002102:Cadaver; D019299:Decompression, Surgical / Q000379:methods; D005260:Female; D006801:Humans; D007431:Intraoperative Complications / Q000517:prevention & control; D007593:Joint Instability / Q000503:physiopathology; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000502:physiology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000601:surgery; D012446:Sacroiliac Joint / Q000502:physiology*; D012447:Sacrum / Q000033:anatomy & histology; D016474:Weight-Bearing