TY  - JOUR
A1  - ,  
T1  - The postoperative stability of the first metatarsal
JO  - Eur. J. Anat.
SN  - 1136-4890
Y1  - 2004
VL  - 8
SP  - 55
EP  - 59
UR  - http://www.eurjanat.com/web/paper.php?id=04020055
KW  - adult
KW  - aged
KW  - article
KW  - biomechanics
KW  - bone density
KW  - bone mineral
KW  - bone screw
KW  - cadaver
KW  - female
KW  - force
KW  - geometry
KW  - hallux valgus
KW  - human
KW  - human tissue
KW  - intermethod comparison
KW  - male
KW  - metatarsal bone
KW  - osteotomy
KW  - postoperative period
KW  - proximal osteotomy
KW  - scarf shaft osteotomy
KW  - treatment outcome
KW  - weight bearing
N2  - The hallux valgus deformity is characterised by an increased first intermetatarsal angle, which can be reduced by osteotomies on the first metatarsal bone, such as the Proximal osteotomy and the Scarf shaft osteotomy. Osteotomy and subsequent screw fixations were performed on 18 matched pairs of cadaveric specimens to compare the postoperative stability of these two common types of operative correction. Biomechanical testing with plantar force was carried out and failure load was measured for each specimen. The results indicate that the threaded bones provide a high postoperative loading capacity. When maximal strain was exceeded, the specimens failed in the proximal third, irrespective of the type of osteotomy. Moreover, we found that in contrast to the living age the mineral density and the individual geometry of the bone have a marked influence on the postoperative loading capacity. Finally, static biomechanical studies demonstrated that the Scarf osteotomy is significantly more stable than the commonly used Proximal osteotomy. Regarding the early postoperative mobilization of the patients concerned, the Scarf osteotomy proved to be superior, but the Proximal osteotomy requires a more cautious rehabilitation program.
ER  -