By Prof. Dr. Max Aebi FRCS(C), John S. Thalgott M.D., John K. Webb FRCS (auth.)
This ebook has turn into helpful because of the speedy growth of the surgeries and implants to be had for spinal surgical procedure in the "AO Group". we've not tried to write down an in-depth publication on spinal surgical procedure, yet one that can help the doctor within the use of AO strategies and implants. We con sider the sensible classes held around the globe crucial for the instructing of sound options in order that technical problems and terrible effects might be keep away from ed for either the medical professional and, particularly the sufferer. This booklet is a pragmatic guide and an overview of what's taught within the classes. it's meant to aid the younger spinal general practitioner to appreciate the right kind use of AO implants. The indi- tions given will relief the proper use of every method. . It needs to be strongly emphasised that surgical procedure of the backbone is technically de manding. The recommendations defined during this publication may still purely be undertaken by means of surgeons who're knowledgeable and skilled in spinal surgical procedure. convinced thoughts, specifically pedicle screw fIxation and cages, haven't but been totally licensed by way of the FDA within the usa. besides the fact that, in the course of the remainder of the area, using pedicle screws has turn into a regular process for the backbone general practitioner, because it has been proven to enhance fIxation suggestions and make allowance segmental correction of the backbone. using cages has develop into increasingly more renowned, in particular as a device of minimally invasive spinal surgery.
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This combination might occur if the transverse axis of the flexion moment lies close to the posterior wall of the vertebral body. A severe flexion moment may then cause a transverse disruption of the posterior column and simultaneously a compression injury to the vertebral body which corresponds to an type A fracture. 1: Flexion-Subluxation Associated with Type A Fracture (Fig. 11). The injury is unstable in flexion and axial compression. The latter corresponds to the impaired compression resistance of the vertebral body.
The posterior wall of the vertebral body remains intact. The loss of height may occur in the upper part of the vertebral body (superior wedge fracture), in the inferior pelt of the vertebral body (inferior wedge fracture), or antero1aterally (lateral wedge fracture). The last is associated with a scoliotic deformity. A. 3: Vertebral Body Collapse (Fig. 4). This injury is usually observed in osteoporotic spines. There is symmetrical loss of vertebral body height without significant extrusion of fragments.
27 Algorithm for determination of the injury types Since the disk is damaged in all B3 injuries, surgical treatment is indicated, including fusion. 6 or fusion supplemented by tension band fixation or Conclusions followed by postoperative immobilization in slight flexion can be applied in injuries with preserved sta- Experience has shown that to a great extent this clasbility in flexion. The injuries are logically grouped into differor and posterior stabilization or the application of a ent categories according to main mechanisms of infixator system.
AO ASIF Principles in Spine Surgery by Prof. Dr. Max Aebi FRCS(C), John S. Thalgott M.D., John K. Webb FRCS (auth.)