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For more than 80% of body weight is transmitted through the anterior and middle column, the interbody gap produced by operative reduction of spondylolisthesis is potential risk factor for redisplacement, implant failure, pseudoarthrosis and kyphosis. In biomechanical aspect, augmentation of the anterior column support by interbody fusion is desirable to prevent above problems in surgical treatment of spondylolisthesis. Recently, circumferential fusion is recommended in high-grade spondylolisthesis (grade III, IV, or V ), but there is some controversy about additional interbody fusion in posterior instrumentation for low-grade spondylolisthesis (grade I or II ). So, the purpose of this retrospective study was to compare the segmental sagittal angle in 35 patients of low-grade spondylolisthesis who was performed posterior instrumentation with or without posterial lumbar interbody fusion (PLIF) and to find out the risk factors of the loss of segmental sagittal angle in cases of posterior instrumentation without posterial lumbar interbody fusion (PLIF).
Body Weight ; Humans ; Kyphosis ; Pseudarthrosis ; Retrospective Studies ; Risk Factors ; Spondylolisthesis*

1.The Change of Lumbar Lordosis after Pedicular Screw Fixation of the Degenerative Lumbar Spine.

2.Prognostic Factors after Conventional Surgery of Lumbar Disc Herniation: Comparative Study between Non-compensator and compensator.

3.Treatment of burst fracture in thoracic and lumbar spine using Kaneda instrument.

4.Long term results and clinical evaluation of lung cancer.

5.Clinical evaluation of 32 cases aortocoronary bypass with saphenous vein.

6.Improvement of titration methods for porcine rotavirus, its serum neutralizing antibody and of virus isolation from feces.

7.Surgical management of cardiac tamponade.

8.A Case of Cloacal Extrophy.

9.Clinical anaysis of failed lumbar disc surgery.

10.The Change of Segmental Sagittal angle in Low - grade spondylolisthesis after Pedicular Screw Fixation with or without PLIF - PLIF + PLF versus PLF groups -.

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