International Organization for Standardization (ISO)
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ISO 9269:1988
Scope
Specification of dimensions and tolerances of the holes and slots in bone plates used as surgical implants so as to facilitate correct fixing using screws complying with ISO 9268. This standard does not deal with the shape and dimensions of plates or with the spacing of the holes and slots. The different forms are illustrated. The informative annex A shows the interrelationship of International Standards dealing with bone screws, bone plates and relevant tools.
ISO 9269:1988 history
1988ISO 9269:1988 Implants for surgery; metal bone plates; holes and slots corresponding to screws with conical under-surface