scholarly journals PONTICULUS POSTICUS: ITS INCIDENCE AND IMPLICATIONS FOR SCREW INSERTION INTO LATERAL MASS OF ATLAS: USING PLAIN CERVICAL RADIOGRAPH

2017 ◽  
Vol 5 (3.3) ◽  
pp. 4383-4387
Author(s):  
Hiroli WF ◽  
◽  
Kasegaonkar MS ◽  
Gosavi AG ◽  
◽  
...  
Keyword(s):  
Lateral Mass ◽  
Screw Insertion ◽  
Ponticulus Posticus

The Ponticulus Posticus as Risk Factor for Screw Insertion into the First Cervical Lateral Mass

2018 ◽  
Vol 113 ◽  
pp. e579-e585 ◽  
Author(s):  
Dilek Arslan ◽  
Mehmet Asim Ozer ◽  
Figen Govsa ◽  
Omer Kıtıs
Keyword(s):  
Risk Factor ◽  
Lateral Mass ◽  
Screw Insertion ◽  
Ponticulus Posticus

Transfacet screw placement for posterior fixation of C-7

2008 ◽  
Vol 9 (2) ◽  
pp. 200-206 ◽  
Author(s):  
Eric M. Horn ◽  
Nicholas Theodore ◽  
Neil R. Crawford ◽  
Nicholas C. Bambakidis ◽  
Volker K. H. Sonntag
Keyword(s):  
Intraoperative Complications ◽  
Pedicle Screws ◽  
Retrospective Chart Review ◽  
Screw Placement ◽  
Posterior Fixation ◽  
Lateral Mass ◽  
Screw Insertion ◽  
Novel Technique ◽  
Hardware Failures

Object Lateral mass screws are traditionally used to fixate the subaxial cervical spine, while pedicle screws are used in the thoracic spine. Lateral mass fixation at C-7 is challenging due to thin facets, and placing pedicle screws is difficult due to the narrow pedicles. The authors describe their clinical experience with a novel technique for transfacet screw placement for fixation at C-7. Methods A retrospective chart review was undertaken in all patients who underwent transfacet screw placement at C-7. The technique of screw insertion was the same for each patient. Polyaxial screws between 8- and 10-mm-long were used in each case and placed through the facet from a perpendicular orientation. Postoperative radiography and clinical follow-up were analyzed for aberrant screw placement or construct failure. Results Ten patients underwent C-7 transfacet screw placement between June 2006 and March 2007. In all but 1 patient screws were placed bilaterally, and the construct lengths ranged from C-3 to T-5. One patient with a unilateral screw had a prior facet fracture that precluded bilateral screw placement. There were no intraoperative complications or screw failures in these patients. After an average of 6 months of follow-up there were no hardware failures, and all patients showed excellent alignment. Conclusions The authors present the first clinical demonstration of a novel technique of posterior transfacet screw placement at C-7. These results provide evidence that this technique is safe to perform and adds stability to cervicothoracic fixation.

The Feasibility of Microscope-Assisted “Free-Hand” C1 Lateral Mass Screw Insertion Without Fluoroscopy

Spine ◽  
2008 ◽  
Vol 33 (9) ◽  
pp. 1042-1049 ◽  
Author(s):  
Gabriel Liu ◽  
Jacob M. Buchowski ◽  
Hongxing Shen ◽  
Jin Sup Yeom ◽  
K Daniel Riew
Keyword(s):  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Screw Insertion ◽  
C1 Lateral Mass Screw

C1 Lateral Mass Screw Insertion With Protection of C1-C2 Venous Sinus

Spine ◽  
2010 ◽  
Vol 35 (21) ◽  
pp. E1133-E1136 ◽  
Author(s):  
Jie Pan ◽  
Lijun Li ◽  
Lie Qian ◽  
Jun Tan ◽  
Guixin Sun ◽  
...  
Keyword(s):  
Venous Sinus ◽  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Screw Insertion ◽  
C1 Lateral Mass Screw

scholarly journals Posterior Subaxial Cervical Spine Screw Fixation: A Review of Techniques

2018 ◽  
Vol 8 (7) ◽  
pp. 751-760 ◽  
Author(s):  
Andrei Fernandes Joaquim ◽  
Marcelo Luis Mudo ◽  
Lee A. Tan ◽  
K. Daniel Riew
Keyword(s):  
Cervical Spine ◽  
Literature Review ◽  
Screw Fixation ◽  
Surgical Techniques ◽  
Pedicle Screw Fixation ◽  
Lateral Mass ◽  
Modified Technique ◽  
Screw Insertion ◽  
Subaxial Cervical Spine ◽  
Fixation Techniques

Study Design: A narrative literature review. Objectives: To review the surgical techniques of posterior screw fixation in the subaxial cervical spine. Methods: A broad literature review on the most common screw fixation techniques including lateral mass, pedicle, intralaminar and transfacet screws was performed on PubMed. The techniques and surgical nuances are summarized. Results: The following techniques were described in detail and presented with illustrative figures, including (1) lateral mass screw insertion: by Roy-Camille, Louis, Magerl, Anderson, An, Riew techniques and also a modified technique for C7 lateral mass fixation; (2) pedicle screw fixation technique as described by Abumi and also a freehand technique description; (3) intralaminar screw fixation; and finally, (4) transfacet screw fixation, as described by Takayasu, DalCanto, Klekamp, and Miyanji. Conclusions: Many different techniques of subaxial screw fixation were described and are available. To know the nuances of each one allows surgeons to choose the best option for each patient, improving the success of the fixation and decrease complications.

COMPARATIVE BIOMECHANICS: CERVICAL SPINE FACET JOINT VERSUS LATERAL MASS SCREW INSERTION TECHNIQUE

2005 ◽  
Vol 09 (03) ◽  
pp. 113-118
Author(s):  
Boon Horng Kam ◽  
Siaw Meng Chou ◽  
Seang Beng Tan
Keyword(s):  
Cervical Spine ◽  
Facet Joint ◽  
Main Concern ◽  
Lateral Mass ◽  
Pullout Strength ◽  
Insertion Technique ◽  
Pullout Resistance ◽  
Screw Insertion ◽  
System A ◽  
Screw Perforation

This study involves a comparative biomechanics of facet joints (FJ) versus lateral mass (LM) screw insertion technique in the human cadaveric lower cervical spine (C3, C4, C5 and C6). The objective of this study is to understand the promising usage of the facet joint insertion technique and to determine the pullout strength of FJ insertion technique for posterior cervical fixation system. A total of 52 disarticulated human vertebrae (C3–C6) were used in this study. DEXA scan was carried out on all specimens before testing. Cortical screws of 3.5 mm and 4.0 mm were used for both FJ and LM techniques, which were subjected to uniaxial load. From the study made so far, the facet joint technique performed well based on the pullout strength values obtained. Having addressed the main concern on screw perforation of lateral mass technique, this facet joint technique not only demonstrated a significantly higher pullout resistance but it is also a relatively low risk surgical procedure.

Lateral Mass of C1 Fixation and Ponticulus-Posticus

2014 ◽  
Vol 82 (1-2) ◽  
pp. e145-e146 ◽  
Author(s):  
Faiz U. Ahmad ◽  
Michael Y. Wang
Keyword(s):  
Lateral Mass ◽  
Ponticulus Posticus
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