By Rigmor Texhammar RN, Christopher Colton M. B., B. S., L. R. C. P., F. R. C. S., F. R. C. S. Ed. (auth.)
The unique AO/ASIF Instrumentation guide offered a concise and entire description of the AO tools. Thoughtfully constructed through Fridolin Sequin and Rigmor Tex hammar, the guide mentioned in a transparent type the aim and care of a few of the AO tools which are dealt with via the working room employees. One very important characteristic of the 1st variation used to be a close list of the tools required for the extra universal operative methods for treating fractures. Fridolin Sequin used to be well-suited to writer the 1st version: his 15 years of expertise as a technical engineer for the AO gave him in-depth wisdom of AO tools, and he drew at the scientific wisdom of Rigmor Texhammar, a specialist and di rector of the AO classes for nurses. Its unique characteristic of com bining a column of textual content with a column of illustrations intended the guide fast grew to become accredited as a typical. via 1981, trans lations may be present in English, French, Spanish, and Italian. now not strangely, the handbook used to be very popular.
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Additional info for AO/ASIF Instruments and Implants: A Technical Manual
These are examples of the relation between mechanical input and the biological reaction of bone. This relation determines to a great extent the 19 • type of fracture healing resulting from the different mechanical conditions that may prevail when a variety of internal fixation techniques are used. We will now discuss these techniques with special reference to the reaction they induce in fractured and intactbone. When a surgeon reconstructs a patient's broken leg, he puts the fractured pieces back into place, holds them together with forceps and inserts a screw that catches in only one fragment of the fracture while the other fragment is held by the head of the screw resting against the surface of the bone.
The strength of a material can be reported as ultimate tensile strength, as bending strength or as torsional strength. e. stress, or as (equivalent) deformation per unit length, strain or elongation at rupture. Stress Protection: This term, initially used to describe bone reaction to reduced functional load (Allgower et al. 1969) is used today mainly to express the negative aspects of stress relief of bone. The basic assumption is that bone deprived of necessary functional stimulation by changing mechanical load becomes less dense or strong (Wolff's law, Wolff 1893, 1986).
Reaming destroys the endosteal vascularity by direct stripping of the vessels, by microembolisation and by heat. This results in ischaemia of the central part of the cortex (slotted area). Unreamed intramedullary nailing. The introduction of a nail without reaming leads to minimal circulatory disturbance ofthe cortex. Nonevascularising surgical approach. The bone is exposed trough generous skin incisions, but the periosteal circulation is respected. Epiperiosteal exposure leaves a thin layer of tissue over the exposed part of the bone, thus preserving most of its circulation.
AO/ASIF Instruments and Implants: A Technical Manual by Rigmor Texhammar RN, Christopher Colton M. B., B. S., L. R. C. P., F. R. C. S., F. R. C. S. Ed. (auth.)