下颈椎经关节螺钉固定的生物力学研究

目的比较下颈椎经关节螺钉3层皮质和4层皮质固定的生物力学拔出力的区别。方法10具新鲜尸体颈椎标本（C3-T1），游离成3个颈椎运动节段（C3～C4、C5～C6、C7～T1），在椎体两侧随机进行经关节螺钉3层皮质和4层皮质固定，置入直径为3．5mm的皮质骨螺钉。置入经关节螺钉行拔出力试验，比较经关节螺钉2种固定方式的最大轴向拔出力。结果下颈椎经关节螺钉4层皮质固定的平均拔出力为430N，而3层皮质固定的平均拔出力为412N，但两者间差异无统计学意义（P〉0．05）。经关节螺钉两种固定方式在颈椎各节段间差异无统计学意义（P〉0．05）。结论下颈椎后路经关节螺钉3层皮质固定的力学性能与4层皮质固定差异并不明显。经关节螺钉3层皮质固定可能在减少和避免置钉相关的神经血管损伤并发症方面有着重要的临床意义。     

两种下颈椎经关节螺钉植入方法的比较研究

目的：比较两种下颈椎经关节螺钉植入方法的优缺点,提出并验证更为合理的植入方法,为临床提供参考。方法：运用8具颈椎标本随机模拟植入下颈椎经关节螺钉,植入的方法：一侧采用Takayasu法（记为A组）,另一侧采用Dalcanto法（记为B组）。A、B两组分别统计：植入时关节突关节劈裂情况;横突孔侵犯情况;植入后神经根损伤情况;未通过关节突关节的螺钉数。结果：共植入下颈椎经关节突螺钉64枚,A、B两组各32枚。A组未见下关节突劈裂;B组见下关节突关节下缘劈裂7例,外缘劈裂3例;两组中均未见上关节突劈裂。A组中发现8枚螺钉侵犯横突孔,B组未见横突孔侵犯。神经根前支损伤A组11例,B组2例;神经根后支损伤A组8例,B组9例。经观察证实A组2例未经过关节突关节,B组均经过下关节突关节。结论：Takayasu法在螺钉植入过长时易引起神经根和椎动脉损伤．而Dalcanto法在植入螺钉时易引起下关节突劈裂。     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

目的 探讨在下颈椎经颈后正中入路应用经关节螺钉联合侧块螺钉或椎弓根螺钉行内固定治疗的固定效果.方法 2003年2月至2007年10月,对22例患者通过后路应用经关节螺钉联合侧块螺钉或椎弓根螺钉行内固定治疗,男14例,女8例;年龄24～73岁,平均43岁.其中下颈椎创伤性骨折脱位13例,颈椎后纵韧带骨化症4例,颈椎管狭窄伴Ⅱ型齿突骨折1例,颈椎间盘突出伴椎管狭窄4例.结果 共置入经关节螺钉45枚,其中C4,5 2枚,C5,639枚,C6,74枚;共置入侧块螺钉12枚,C3、C4各6枚;共置入椎弓根螺钉41枚,其中C24枚,C32枚,C46枚,C721枚,T18枚.术中所有螺钉均成功置入,未出现椎动脉、神经根和脊髓损伤等置钉相关并发症.22例患者均获随访,随访时间10个月～3年8个月,平均17个月.植骨融合时间3～5个月,平均3.5个月.术后发现1例患者的2枚经关节螺钉松动,部分脱出.经加强颈托制动,术后4个月获得融合.结论 通过后路固定下颈椎时,采用经关节螺钉联合侧块螺钉或椎弓根螺钉固定,均可取得较好的固定效果.     

下颈椎经关节螺钉钢板固定的生物力学研究

目的:研究下颈椎单独经关节螺钉固定与经关节螺钉钢板固定的三维稳定性之间的差异。方法:12具新鲜人体颈椎标本,制成C4,5、C5,6节段三柱损伤模型。随机选取6具标本在C4,5、C5,6行单独经关节螺钉固定,另6具标本在C4,5、C5,6行经关节螺钉钢板固定。在非限制性和非破坏性的试验条件下测试它们在前屈、后伸、左右侧弯和轴向旋转运动状态的稳定性,分别测试标本损伤模型制作前完整标本组(A组)、单独经关节螺钉固定组(B组)和螺钉钢板组(C组)3组数据。结果:单独经关节螺钉固定组和经关节螺钉钢板固定组在各方向的运动范围(ROM)和中性区(NZ)的均数均小于完整标本组,差异有统计学意义(P0.05)。经关节螺钉钢板固定在前屈运动中的ROM和NZ与单独经关节螺钉固定比较,差异无统计学意义(P0.05);在后伸、左右侧弯和轴向旋转运动中,经关节螺钉钢板固定的稳定性优于单独经关节螺钉固定,差异有统计学意义(P0.05)。结论:下颈椎经关节螺钉钢板固定的稳定性优于单独经关节螺钉固定,在使用下颈椎经关节螺钉时,相对于单独螺钉固定,建议以螺钉钢板形式固定。     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

下颈椎经关节螺钉联合侧块或椎弓根螺钉固定的效果

Objective To discuss the effect of transarticular screws combined with lateral mass screws or pedicle screws through posterior approach in the lower cervical spine. Methods From February 2003 to October 2007, 22 patients were treated using transarticular screws internal fixation combined with lateral mass screws or pedicle screws in Axis plating system and Vertex system. There were cervical fracture and dislocation in 13 patients, ossification of the posterior longitudinal ligament in 4, cervical canal stenosis associated with dentoid process fracture in 1, and cervical disc herniation associated with cervical stenosis in 4 patients. Lamina or facet bone grafting were used to achieve a long-term stability, with decompression and anterior approach or not. The starting point for screw insertion was located 1 mm medial to the midpoint of the lateral mass and the direction of the screw was 40° caudally in the sagittal plane and 20° laterally in the axial plane. Results All screws insertion was successful. A total of 45 transarticular screws were inserted, with 2 in C4,5, 39 in C5,6 and 4 in C6,7. A total of 12 lateral mass screws were inserted, with 6 in C3 and 6 in C4. A total of 41 pedicle screws were inserted, with 4 in C2, 2 in C3 and 6 in C4, 21 in C7 and 8 in T1. There was no complication related to screw insertion, such as injury to the vertebral artery, nerve roots or spine cord. The follow-up period ranged from 10 months to 3 years and 8 months (mean 17 months). All cases got bone fusion. Only one instance of screw partial backout was identified, but fusion was achieved in all pa-tients. In the follow-up period, only one instance of screw partial backout was identified, but fusion was achieved in all patients. Conclusion The combined use of transarticular screws and lateral mass screws or pedicle screws fixation in the lower cervical spine can enlarge the advantages of strong stability,relatively simple, and reduce operating risk when performed appropriately.     

三种下颈椎经关节螺钉植入方法的比较研究

目的：比较3种下颈椎经关节螺钉植入方法的优缺点,为选择下颈椎经关节螺钉的植入方法提供可靠的基础资料。方法：选用新鲜颈椎标本（C1-T1）24具（男14具,女10具）,年龄55～80岁,平均68岁。采用抽签随机对照研究方法,在每一颈椎标本两侧用不同的植入方法植入下颈椎经关节螺钉。根据进钉点及进钉方向的不同,采用Takayasu法（A组）、Dalcanto法（B组）、Klekamp法（C组）作为下颈椎经关节螺钉的植入方法。Takayasu法选用侧块中线上中1/3交界处作为进钉点,螺钉向前侧、尾侧倾斜,与侧块冠状面呈60°～80°,平行于矢状面作为进钉方向;Dal-canto法采用进钉点在侧块中点下方2mm,方向向尾侧倾斜40°,向外侧倾斜20°;Klekamp则将侧块中点内下方1mm为进钉点,方向向尾侧倾斜40°,向外侧倾斜20°。对A、B、C组分别统计植入时关节突关节劈裂、植入后椎动脉侵犯、神经根前后支损伤和螺钉通过关节突关节的情况。结果：24具颈椎标本共48侧,植入下颈椎经关节突螺钉192枚,其中A、B、C组各64枚。A组未见下关节突劈裂;B组见下关节突下缘劈裂17例,外缘劈裂8例;C组下关节突下缘劈裂1例,外缘劈裂1例。3组均未见上关节突劈裂。3组螺钉植入时关节突关节劈裂情况比较,B组下关节突劈裂最多,与其他2组差异有统计学意义（χ2AB=31.07,P〈0.01;χ2BC=24.83,P〈0.01）。C组2例下关节突劈裂,与A组比较差异无统计学意义（χ2AC=2.03,P〉0.05）。A组36枚螺钉侵犯椎动脉,B、C组均未见椎动脉侵犯。3组螺钉植入后椎动脉受累情况,A组高于其他2组（χ2AB=50.09,P〈0.01;χ2AC=50.09,P〈0.01）。神经根前支损伤A组40例,B组5例,C组3例;神经根后支损伤A组16例,B组18例;C组14例。3组间颈神经根前支受累比较,A组高于其他2组（χ2AB=41.98,P〈0.01;χ2AC=47.94,P〈0.01）,而B、C组差异无统计学意义。颈神经根后支受累比较,3组间差异无统计学意义（χ2AB=0.16,P〉0.05;χ2AC=0.17,P〉0.05;χ2BC=0.67,P〉0.05）。A组5例未经过关节突关节,B、C2组均经过关节突关节,3组间差异无统计学意义（χ2AB=3.33,P〉0.05;χ2AC=3.33,P〉0.05）。结论：Takayasu法在螺钉植入过长时易引起神经根和椎动脉损伤,而Dalcanto法在植入螺钉时易引起下关节突的劈裂。相比较而言,Klekamp法临床上更值得推崇。     

Lower cervical spine injury treated with lateral mass plates and pedicle screws through posterior approach

Theincidenceofspinalinjuryislessinthelowercervicalsegments(C6 C7)thanintheC3 C6segments.Operationthroughanteriorapproachiscommonlyusedfortheseinjures,butfewerreportsofthelowercervicalspineandspinalcordinjurytreated withcervicallateralmassplatesandT1pedicl…     

颈椎经关节椎弓根螺钉固定与标准椎弓根螺钉固定的生物力学比较

目的 比较颈椎经关节椎弓根螺钉固定和标准椎弓根螺钉固定的拔出强度.方法 取10具新鲜尸体颈椎标本(C_3～T_1),游离成三个颈椎运动节段(C_(3,4),C_(5,6),C_7T_1).在椎体两侧随机进行经关节椎弓根螺钉固定或标准椎弓根螺钉固定,置入直径3.5 mm皮质骨螺钉.经关节椎弓根螺钉固定以上位椎骨侧块外下象限中点为进钉点,在直视椎弓根下,螺钉在冠状面内倾约45°、矢状面尾倾约50°.由上位椎骨下关节突经关节突关节、下位椎骨的椎弓根,进入下位椎骨的椎体内.标准椎弓根螺钉固定以侧块外上象限中点为进钉点,在直视椎弓根下,螺钉方向参考CT测量结果 ,尽量与椎弓根倾斜角度保持一致,在横断面上内倾约45°、矢状面上螺钉指向椎体的上1/3.在生物力学试验机上行拔出强度试验,比较两种螺钉固定的最大轴向拔出力.结果 颈椎经关节椎弓根螺钉固定平均最大轴向拨出力为(694±42)N,标准椎弓根螺钉固定为(670±36)N,两者比较差异有统计学意义(P<0.05).结论 颈椎后路经关节椎弓根螺钉固定的拔出强度大干标准椎弓根螺钉固定,从生物力学强度方面考虑经关节椎弓根螺钉固定可以作为标准椎弓根螺钉固定的一种补充方法.     

下颈椎后路经关节螺钉内固定的解剖学研究

目的明确下颈椎后路经关节螺钉固定的技术参数，为临床应用提供参考。方法取20具（男14具、女6具）尸体颈椎标本，仔细解剖颈部的后侧和侧前方，以清晰地暴露颈椎侧块，保护好脊神经前、后支（C2-7）及其与周围结构的关系。确定安全的进、出钉点，从C2.3-C5.6直视下置人经关节螺钉。通过CT重建，测量经关节固定螺钉的角度、长度、螺钉尖与椎动脉的距离，并确定经关节螺钉矢状面的安全进钉角度（sagittal safety angle，SSA）。结果经关节固定螺钉方向在矢状面呈尾倾，冠状面呈外倾，各固定节段间略有不同，但差异无统计学意义（P〉0．05）。下颈椎后路经关节螺钉固定的理想角度为在矢状面尾倾平均37.3^o±5．0^o，在冠状面外倾平均16．6^o±4．6^o。经关节螺钉钉道长度平均为（18．7±1.4）mm，在C2.3，水平螺钉钉道长度与C3.4C4.5C5.6比较差异有统计学意义（P〈0．05）。后路经关节螺钉矢状面安全进钉角度为41．9^o±5．6^o，螺钉钉尖与椎动脉的距离平均为（5．8＋1．5）mm，各固定节段间略有不同，但差异无统计学意义（P〉0．05）。结论下颈椎后路经关节螺钉置钉时要求一定的准确性，可以作为颈椎侧块螺钉和椎弓根螺钉固定的一种补充内固定方法。     

计算机辅助导航模板在下颈椎椎弓根定位中的临床应用

目的 利用逆向工程(reverse engineering,RE)原理和快速成型(rapid prototyping,RP)技术设计一种新的下颈椎椎弓根定位的方法,并探讨其临床应用.方法 采用患者CT连续扫描数据集,三维重建软件Amira 3.1建立颈椎三维模型,以STL格式导出模型.在UG Imageware 12.0平台打开三维重建模型,定位三维参考平面.利用RE原理寻找椎弓根的最佳进钉钉道.提取椎板的表面解剖学形态,建立与椎体后部解削学形态一致的模板.拟合模板和椎弓根孔道成定位模板,将椎体和定位模板通过激光Rp技术生产出实物模板,手术时利用建立的定位模板与椎体的后部结构相吻合,通过导航孔进行下颈椎椎弓根的定位,植入椎弓根螺钉.术后根据X线片和CT扫描评价椎弓根螺钉的位置.结果 建立了制作个体化导航模板的方法,通过RP技术生产出的导航模板具有较好的准确性,适用于颈椎椎弓根螺钉的导航定位.结论 利用RE原理和RP技术为颈椎椎弓根的定位提供了一种新的方法,该方法为下颈椎椎弓根螺钉植入提供了一种新的方法,具有较大的应用前景.     

下颈椎内固定治疗进展及问题探讨

本文介绍了下颈椎前路和后路使用各种器械进行内固定的最新方法,并对其中常见的一些问题进行了探讨。颈椎前路钢板螺钉内固定系统可以明显提高植骨融合率,其并发症以内固定松动或失败最为常见,简要介绍了预防该并发症在操作时需注意的各种事项及方法。颈椎前路界面固定技术可以无须另外取自体髂骨或腓骨等进行植骨,避免了二次手术的并发症。人工椎间盘置换术可以避免融合后相邻节段的继发退变以及由此引起的新症状,最终疗效还需要大宗病例积累和长期随访结果证实。颈椎侧块螺钉内固定操作方法较多,但比较简单,固定可靠。对神经根、脊髓的损伤是其最重要的并发症,熟悉颈椎解剖可以避免这些并发症。颈椎椎弓根内固定技术是目前固定最为牢固的方法,操作比较困难,主要并发症是螺钉穿破椎弓根,术前仔细的影像学研究或使用导航技术,做到个体化置钉,可以有效提高置钉准确率。     

盲置法颈椎弓根螺钉置钉技术的简化与应用

目的探索一种安全、简便、有效的颈椎弓根螺钉置钉方法，便于临床的推广。方法应用颈椎弓根螺钉内固定技术治疗患者11例，共置钉64枚，平均年龄为36岁，其中10例为颈椎外伤，1例为颈椎后纵韧带骨化（连续型）。结果．平均随访16个月，最后随访时X线片显示骨融合良好，无内固定松动或断裂。术中出血量平均约500mL，每枚螺钉置钉所花时间平均约为3min，9例54枚螺钉术后行X线及CT扫描进行椎弓根螺钉位置评价，均置钉成功；2例10枚螺钉术后因经济因素仅行X线检查，螺钉位置良好，无并发症发生。结论在C3-7节段，“一点两垂直法”用于颈椎弓根螺钉的置钉既安全又简便，适用于临床推广，但在术前仍应进行个体化评估，排除手术的禁忌。