By Soo-Young Oh
Read or Download Autologous Bone Plugs Fusion: Treatment for Lumbar Instability: 3E Criteria Technical Operative Notes The Functioning of the Oh's Screw PDF
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Additional resources for Autologous Bone Plugs Fusion: Treatment for Lumbar Instability: 3E Criteria Technical Operative Notes The Functioning of the Oh's Screw
If operative intervention is being considered, CT and MRI studies may be useful, particularly a horizontal-beam study made in flexion and extension. Clinical Consideration of Instability 25 Instability following Herniated Disc Surgery Postoperative HIVD with Instability Typical HIVD (as illustrated in fig. 28) is seen in patients which were operated on already 2–4 times for HIVD without improvement. N F E Fig. 28. Functional X-ray movement checking for instability. F = Flexion; N = neutral; E = extension.
Optimum loading will be achieved if the cortical hard margins remain in the direction of forces. The screw fixes the orientation of the individual plug fragment and also prevent the bone plug from slipping back into the spinal canal (fig. 52). F L5 C ST F C : Clip ST: Silicon tube F : Fascia Fig. 51. Oh’s temporary marking screw. ST = Silicon tube; C = clip; F = fascia. 25 mm 18 mm Fig. 52. Normally deformed. Ideal Screw Position The screw has to have exact and direct contact with the dorsal plugs (fig.
The first fusion operation was performed in November 1990 for instable spondylolisthesis on level L4/5 with a herniated intervertebral disc. The first 13 cases were treated without the screw. A complication developed abruptly in case 13. The patient suffered acute sciatic pain with sensomotoric weakness of nerve root L5 on the right side. There were symptoms of nerve root compression; the plugs are often not visible at X-ray in a sitting person if the patient has a thick pelvis. An emergency operation was performed; the dorsal plug luxated particularly into the spine canal.