Three-dimensional frameless stereotactic-guided pedicle screw fixation of the spine: early experiences in King Chulalongkorn Memorial Hospital.
OBJECTIVE
To study the accuracy and safety of pedicle screw insertion by three-dimensional frameless stereo-tactic-guided technique.


METHODS
Twelve patients underwent spinal surgery using three- dimensional frameless stereo-tactic-guided technique at King Chulalongkorn Memorial Hospital (KCMH) during June - December 2004. In all patients, post-operative CT scan of the operated spinal segments were obtained and evaluated for the position of each screw placed. Medical records were reviewed and all patients were interviewed by telephone to assess clinical outcomes and complications


RESULTS
5I pedicle screws were inserted in 12 patients. Postoperative CT scan of the instrumented spine revealed that 50 screws were considered grade I screw while one screw was considered grade II. No patient suffered direct vascular or neurological injury.


CONCLUSIONS
Three-dimensional frameless stereotactic-guided technique provides additional safety to spinal instrumentation
Division of Neurological Surgery, Department of Surgery, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand.
Chopeow
C
Taecholarn
Peerapong
P
Montriwiwatchai
Thana
T
Tongkon
Surachai
S
Khaoroptham
D000328:Adult; D000368:Aged; D001863:Bone Screws; D005260:Female; D006785:Hospitals, University; D006801:Humans; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care; D011446:Prospective Studies; D018570:Risk Assessment; D012494:Sampling Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D013122:Spinal Diseases / Q000175:diagnosis* / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods*; D013238:Stereotaxic Techniques; D025321:Surgery, Computer-Assisted / Q000379:methods*; D013785:Thailand; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome