Study finds posterior C1 fixation to be safe, accurate

April 6, 2012
Study finds posterior C1 fixation to be safe, accurate
Posterior C1 screw fixation can be performed safely and accurately, without significant hemorrhaging, according to a study published in the March issue of The Spine Journal.

(HealthDay) -- Posterior C1 screw fixation can be performed safely and accurately, without significant hemorrhaging, according to a study published in the March issue of The Spine Journal.

Richard J. Bransford, M.D., of the University of Washington School of Medicine in Seattle, and colleagues retrospectively reviewed a tertiary care spine database to identify 176 patients (97 males and 79 females) with posterior C1 screw fixation (216 lateral mass [LM] screws and 128 transarticular screws). Postoperative CT scans were used to assess the accuracy of placement of C1 instrumentation in 147 patients (286 screws). Screws were graded using the following definitions: Type I, screw threads completely within the bone; Type II, less than half the diameter of the screw violating the surrounding ; and Type III, clear violation of transverse foramen or .

The researchers found that 86 percent of screws were rated as being ideal (Type I), 96 percent were rated as "safe" (Type I or II), and 4 percent were rated as unacceptable (Type III). No neurologic or vertebral artery injuries were reported; one patient required revision surgery for a medially placed screw. Across all patients, the mean C1 LM width was 10.5 mm and was estimated to be an average of 331 mL.

"Our findings demonstrate a low incidence of complications associated with posterior screw instrumentation of the C1 LM," the authors write.

Several authors disclosed with .

Explore further: Molecular imaging pinpoints source of chronic back pain

More information: Abstract
Full Text (subscription or payment may be required)

Related Stories

Molecular imaging pinpoints source of chronic back pain

June 6, 2011

A study introduced at SNM's 58th Annual Meeting shows potential relief for patients who suffer chronic pain after back surgery. A molecular imaging procedure that combines functional and anatomical information about the body ...

Smart materials that get bone to heal

November 4, 2011

Bone tissue is very good at self-healing, but in many situations the natural healing process is not sufficient. In a dissertation at Uppsala University, Sonya Piskounova shows how functional materials that she and her colleagues ...

New method for stronger dental implants

March 1, 2012

Millions of people have bad teeth replaced with implants. Often following the procedure, they are unable to chew food for up to six months, until the implant has become fixated in the bone. Now, for the first time, a drug ...

Recommended for you

Cellphone data can track infectious diseases

August 20, 2015

Tracking mobile phone data is often associated with privacy issues, but these vast datasets could be the key to understanding how infectious diseases are spread seasonally, according to a study published in the Proceedings ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.