The researches find that the often used to secure surgically implanted hardware to the spine in patients with spinal disease or spinal trauma. In some cases, these screws loosen over time, leading to spinal instability and consequent pain. This is a common complication of spine surgery. One reason suggest for pedicle screw loosening is implant-associated infection; but until now there has been little clinical evidence to support this theory.
Secure surgically implant
In the article “High frequency of low-virulent microorganisms detected by sonication of pedicle screws: a potential cause for implant failure;” publish today in the Journal of Neurosurgery: Spine, Vincent Prinz, MD; and colleagues recount their detection of microbial colonization of surgical implant hardware in patients with no apparent clinical signs of infection.
The study focused on 82 patients who underwent surgery during which a spinal hardware implant had to be removed. None of these patients had clinical or laboratory evidence of active infection; and there was no obvious sign of infection during surgery. Following surgery, sonication was used to detect the presence of microbial biofilms on the extracted hardware.
Evidence of active infection
This application of sound wave energy breaks apart any sticky biofilm covering surgical implants, separating microorganisms that inhabit it. The microorganisms that had colonized the implants were then examine to specify what types are present. Surgery (from the Greek: χειρουργική cheirourgikē, via Latin: chirurgiae, meaning “hand work”) is a medical specialty that uses operative manual and instrumental techniques on a patient to investigate and/or treat a pathological condition such as disease or injury, to help improve bodily function or appearance, or sometimes for some other reason.
An act of performing surgery may be call a surgical procedure, operation, or simply surgery. In this context, the verb operating means performing surgery. The adjective surgical means pertaining to surgery; e.g. surgical instruments or surgical nurse. The patient or subject on which the surgery is perform can be a person or an animal.
Covering surgical implants
A surgeon is a person who performs operations on patients. Persons describe as surgeons are commonly medical practitioners, but the term is also apply to physicians, podiatric physicians, dentists and veterinarians. Surgery last from minutes to hours, but is typically not an ongoing or periodic type of treatment.
The authors found evidence of pedicle screw loosening in 54 of the 82 patients; the other 28 patients formed a control group. Sonication verified microbial colonization of extracted hardware with one or more bacteria in 22 (40.7%) of the 54 patients with pedicle screw loosening. Sonication found no microbial colonization in hardware removed from the 28 patients in whom there was no pedicle loosening.