os odontoideum

os o·don·toi·de·um

the dens of the axis when anomalously not fused with the body of the axis.
References in periodicals archive ?
Complete reduction of retro-odontoid soft tissue mass in os odontoideum following the posterior C1-C2 transarticular screw fixation.
7] Failure of fusion of XY complex with Z at the dento synchondrosis or maintenance of transitory intervertebral disc at this point, produces an os odontoideum thought to be induced by excessive movement at the time of ossification of dens.
Os odontoideum is the most common anomaly of the odontoid process.
The radiographic report, read by a chiropractic radiologist, gave the following information "Dystopic os odontoideum with dynamic stenosis at C1-C2 and lateral hypermobility with secondary degenerative joint disease of the left lateral atlanto-axial joint.
The patient was educated on the os odontoideum condition, advised that cervical spine manipulation was no longer a treatment option, and referred back to his medical doctor for further evaluation and surgical considerations.
Bu sunumda servikal diskopati ile komplike olmus asemptomatik myelopatili bir os odontoideum olgusu ilgili literatur esliginde tartisilmistir.
Beyin cerrahi konsultasyonu sonucunda myelomalazik sinyal degisikliginin sebebinin os odontoideum kaynakli servikal instabilite ve kord kompresyonu olduguna karar verildi.
9) cocuklarda odontoid kiriginin teshis edilememe ya da immobilizasyon eksikligi nedeniyle os odontoideum sendromuna neden olabilecegini gostermislerdir.
The original instability resulted from rheumatoid arthritis in nine, os odontoideum in five, Type II nonunions in eight, unstable bursts in seven, transverse ligament rupture in six, Type III ondontoid fractures in five.
KEY WORDS: Os odontoideum, atlantoaxial instability, manipulation.
The purpose of this paper is to demonstrate the multidirectional upper cervical instability present in an individual with os odontoideum but without significant complaints.
Os odontoideum with associated multidirectional instability of C1 on C2.