الفهرس 
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Abstract
At the final evaluation of this study, the described technique for intraoperative measurement of corrective forces was efficient in evaluating the flexibility of the curve achieved after anterior release, posterior release and after both.
Although the total correction of both groups was insignificantly different regarding the correction in coronal plain, the anterior release was superior in achieving better results regarding the sagittal profile and saving fusion levels as well.
Anterior thoracoscopic release was proved to be applicable and effective in correction of rigid thoracic curves. The thoracoscopic release Undertaking in prone position has an advantage over the lateral position regarding saving repositioning and redraping time and hence the operative time. It has also the advantage of applicability of simultaneous posterior release and fusion under the same anesthesia. It also allowed the application of our technique for evaluation of the corrective forces using the posterior landmarks to evaluate the sufficiency of the anterior release.
The operative time and blood loss values were not significantly different in comparison to other studies using the same technique. However these values are significantly better in comparison to results of thoracoscopy in lateral position.
The operative time was insignificantly longer in group A in comparison to group B. Also the blood loss was more in group A than in group B. We expect that these values will be better in the future with young surgeons gaining more experience and saving more operative time and blood loss.
The spontaneous correction of the non-fused lumbar curve was achieved in both studied groups with significantly fewer fusion levels in group A. The tendency towards lumbar decompensation in group A is not the rule and it was not proved to be directly related to the anterior release.
A longer period of follow up is nessessary for evaluation of long term follow up of our cases.
A larger number of patients, a broader spectrum of curve types and a group for anterior release and fusion alone are planned for a more accurate evaluation of both techniques.
There are still many other points to be studied regarding the comparison of simultaneous anterior thoracoscopic and posterior release as and posterior release alone e.g. the correlation of the flexibility achieved intraopertively and the flexibility achieved in bending views.