Study and application of free hand insertion with the lateral mass screw of atlas and vertebra dentata pedicle screw
- VernacularTitle:寰椎侧块螺钉与枢椎弓根螺钉徒手植入技术的研究与应用
- Author:
Dingjun HAO
;
Baorong HE
;
Wei LEI
- Publication Type:Journal Article
- Keywords:
Atlantoaxial;
Screw;
Free hand insertion;
Internal fixation
- From:
Orthopedic Journal of China
2006;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
[Objective]To summary the methods and results of free hand insertion with the lateral mass screw of atlas and vertebra dentata pedicle screw.[Method]Fifty samples of fresh adult atlas and dentate were used.There were 25 males and 25 females samlpes.Then rongeur forceps was used to bite the bone of entrance.The way of screw was made by Kirschner wire of 1.5mm and 2.5mm in diameter.Guide pin was inserted along the way.The screws were placed in lateral mass of atlas beside the posterior arch of atlas about 18～20mm and the point of intersection above 2mm inferior boarder of posterior arch.Vertical with coronal plane,the tip of the screw was made 5? to side of head in sagittal plane.The site of the screws placed in vertebra dentate was divided equally the inferior articular process of axis,made 15?with sagittal plane and 30?with cross section.There were 26 patients with Atlantoaxial vertebra unsteadiness,15 males and 11 females,with an average age of 39.5 years.Seventeen cases were used with screws and rod system and 9 patients were used screws and plate system.Preoperative JOA scores were from 5.1 to(10.6),with an average of 7.6.[Result]There were no cases with spinal cord and vertebral artery injury after surgery.Follow-up duration was from 10 to 25 months,with an average of 14 months.The postoperative JOA scores were from 12.9 to 16.5,with an average of 14.8.The improve rate was 87.6 percent.The plant bones all fused and there were no internal fixation rupture and mobiled.[Conclusion]The technique of free hand insertion with the lateral mass screw of atlas and vertebra dentata pedicle screw is simple,fixation is reliability and is well worth to spreading.
