Widening of the safe trajectory range during subaxial cervical pedicle screw placement: advantages of a curved pedicle probe and laterally located starting point without creating a funnel-shaped hole

Journal of Neurosurgery. Spine
Subum LeeJin Hoon Park

Abstract

OBJECTIVE The small diameter of cervical pedicles and a large transverse cervical pedicle angle are challenges that have led spinal surgeons to investigate how they could achieve a wider safety trajectory and reduce the insertion angle during cervical pedicle screw (CPS) placement. In this paper, the authors detail the advantages of using a curved pedicle probe and a laterally located entry point for overcoming these challenges. METHODS From March 2012 to May 2016, the authors performed posterior cervical fusions using CPSs on 119 consecutive patients. The lateral mass screw conversion and the CPS breach rate were analyzed. Using preoperative CT, it was determined that θlat is similar to the anatomical pedicle angle, and θmed is the minimally acceptable medial angle. The actual insertion medial angle (θins) was determined by postoperative CT. To identify how much of the medial angle on θins could be reduced from the anatomical pedicle angle (θlat), and how much closer to θmed, (θins-θmed) / (θlat-θmed) was calculated. To verify shifting of the entry point and widening of the trajectory, the mean df/Df (i.e., shifted facet point/planned facet point) values were analyzed. RESULTS The total number of planed CPSs was 759, the conve...Continue Reading

References

Mar 1, 1997·Spine·E E KaraikovicR W Gaines
Mar 17, 1999·Clinical Orthopaedics and Related Research·S C LudwigT J Albert
May 12, 2000·Spine·M M PanjabiJ L Wang
Oct 18, 2003·Journal of Neurosurgery·Yoshihisa KotaniAkio Minami
Jan 31, 2004·Spine·Yongjung J KimK Daniel Riew
Feb 3, 2005·Clinical Orthopaedics and Related Research·Hisashi YoshimotoTakeshi Masuda
May 25, 2005·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·E KastW Börm
Nov 8, 2006·The Spine Journal : Official Journal of the North American Spine Society·Todd L JohnstonDavid Marcu
Aug 5, 2009·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Hisashi YoshimotoTakeshi Masuda
Oct 5, 2010·Journal of Craniovertebral Junction and Spine·S RajasekaranT Ajoy Prasad Shetty
Oct 30, 2010·Spine·Jiayong LiuNabil A Ebraheim

❮ Previous
Next ❯

Citations

May 13, 2020·Korean Journal of Neurotrauma·Yoon Gyo JungJin Hoon Park
Mar 17, 2020·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·EunJi MoonJin Hoon Park
Nov 10, 2020·Korean Journal of Neurotrauma·Jae Yeon ParkJin Hoon Park
Mar 16, 2021·Journal of Korean Neurosurgical Society·İismail İştemenYurdal Gezercan
Dec 28, 2021·World Neurosurgery·Hong Kyung ShinJin Hoon Park

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.