First metatarsophalangeal joint arthrodesis: quantitative mechanical testing of six-hole dorsal plate versus crossed screw fixation in cadaveric specimens.
Quantitative strength analysis of first metatarsophalangeal joint arthrodesis was performed using two fixation techniques: a small 6-hole plate with an interfragmentary screw or two crossed lag screws. Twelve matched-pair fresh-frozen cadaveric specimens (24 trials) were used for direct comparison of each of the two fixation techniques. All joint surfaces were prepared with power conical reamers utilizing a standard technique. The fixation construct was stressed to failure on each specimen using a computer-integrated materials tester. Fixation stiffness defined as force (load) over displacement and point of ultimate failure was evaluated. The six-hole plate and interfragmentary screw fixation method was a statistically stiffer form of fixation (p > .01) and displayed a greater point of ultimate failure (p > .002) under the laboratory conditions.
Buranosky
D J
DJ
Department of Orthropaedic Surgery, Loyola University Medical Center, Maywood, IL 60153, USA.
Taylor
D T
DT
Sage
R A
RA
Sartori
M
M
Patwardhan
A
A
Phelan
M
M
Lam
A T
AT
D000368:Aged; D000369:Aged, 80 and over; D001174:Arthrodesis / Q000295:instrumentation / Q000379:methods*; D001696:Biomechanical Phenomena; D001860:Bone Plates / Q000592:standards*; D001863:Bone Screws / Q000592:standards*; D002102:Cadaver; D005260:Female; D006801:Humans; D016268:Internal Fixators; D008297:Male; D016555:Matched-Pair Analysis; D008683:Metatarsophalangeal Joint / Q000503:physiopathology / Q000601:surgery*; D008875:Middle Aged