Mechanical induction of osteogenesis: the importance of pin rigidity

Eight dogs, divided into two groups of four by varying pin rigidity, underwent 15% left tibial lengthening by the Ilizarov method. In group I, "tensioned" 1.6-mm wires maintained a rigidity approaching that of 4.0-mm pins. In group II, the wires, maintained at half the tension, averaged 45...

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Bibliographic Details
Published inJournal of pediatric orthopaedics Vol. 8; no. 4; p. 396
Main Authors Aronson, J, Harrison, B, Boyd, C M, Cannon, D J, Lubansky, H J
Format Journal Article
LanguageEnglish
Published United States 01.07.1988
Subjects
Adolescent
Animals
Biomechanical Phenomena
Bone Lengthening - instrumentation
Bone Nails
Calcium - analysis
Collagen - analysis
Densitometry
Dogs
Evaluation Studies as Topic
Exostoses, Multiple Hereditary - therapy
Female
Humans
Male
Orthotic Devices
Osteogenesis
Osteotomy
Random Allocation
Tensile Strength
Tibia
Time Factors
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Summary:Eight dogs, divided into two groups of four by varying pin rigidity, underwent 15% left tibial lengthening by the Ilizarov method. In group I, "tensioned" 1.6-mm wires maintained a rigidity approaching that of 4.0-mm pins. In group II, the wires, maintained at half the tension, averaged 45% of the rigidity measured in group I. All dogs in group I filled the experimental gap with de novo osteogenesis, whereas all of the dogs in group II prematurely bridged the gap, arresting the process of osteogenesis. From these experimental results, clinical trials have been started using commercially available external fixation devices utilizing pins with equivalent rigidity.
ISSN:0271-6798
DOI:10.1097/01241398-198807000-00003