Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Biomaterials
Abstract number: 24977
EVALUATION OF CLINICAL PERFORMANCES OF ULTRAHIGH MOLECULAR
WEIGHT POLYETHYLENE FIBER CABLE USING OSTEOSYNTHESIS-MODEL
OF DOG
Kenichi OE 1 , Seiya JINGUSHI 2 , Hirokazu IIDA 1 , Naohide TOMITA 3
1 Department of Orthopaedic Surgery, Kansai Medical University, Osaka (JAPAN),
2 Department of Orthopaedic Surgery, Kyushu Rosai Hospital, Kitakyushu (JAPAN),
3 Bioengineering Laboratory, Graduate School of Engineering, Kyoto University, Kyoto
(JAPAN)
Availability of ultrahigh molecular weight polyethylene (UHMWPE) fiber cable for
osteosynthesis was evaluated by long-term implantation test using a dog model. The
greater trochanter of the dog femur was cut with the abductor muscle intact, and the
bone fragment was returned to the original position. The UHMWPE fiber cable or
other metal wires were used for the fixation passing through the bone holes. The
evaluation was performed histologically, radiologically and biomechanically. The
UHMWPE fiber cable caused almost no biological reaction with the bone, and no
loosening was observed. Trabecular continuity between the bone fragment and the
greater trochanter was observed radiologically by 3 months after surgery. The pull
out test was carried out in order to confirm whether or not this material could be
removed after bone union. The result showed removability of the UHMWPE fiber
cable. Two cases out of 12 cases using metal wires showed wire breakage, whereas
no cases out of 12 cases using the UHMWPE fiber cable. Although the fixation force
of the UHMWPE fiber cable was less than that of the metal wires, tolerance to clinical
fatigue condition might be higher for use in osteosynthesis fixation. We conclude that
it is a suitable material for use in fixation for osteosynthesis.
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