Fusions at the craniovertebral junction

Ahmed, Raheel; Traynelis, Vincent C.; Menezes, Arnold H.

doi:10.1007/s00381-008-0607-7

Cited by 148 publications

(98 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As regards the atlas, its agenesis, partial aplasia, hypoplasia or a cleft of the C1 posterior arch can appear, or the agenesis or aplasia of the anterior arch [1,2,6,8,9,24,27,28,35,36,38,51]. Occurrence of the supernumerary facets of the atlas is also possible, as well as its partial fusion with the odontoid or with the anterior rim of the foramen magnum, or an incomplete transverse foramen [18,25,39,46].…”

Section: Craniovertebral Anomaliesmentioning

confidence: 99%

“…Certain changes in the region of the odontoid process may also occur: its aplasia [1,19], hypoplasia [10,12,48,54,55], fusion with the C1 anterior arch or with the clivus [18], as well as cleft, bifurcation [43] or duplication [15,30]. Occasionally, basilar invagination occurs, or os odontoideum or os terminale close to the dens [1,3,12,13,17,28,46,55].…”

Section: Craniovertebral Anomaliesmentioning

confidence: 99%

See 1 more Smart Citation

Craniovertebral anomalies associated with pituitary gland duplication

Milić

Samardžić²,

Djorić³

et al. 2015

Folia Morphol

View full text Add to dashboard Cite

show abstract

Section: Craniovertebral Anomaliesmentioning

confidence: 99%

Section: Craniovertebral Anomaliesmentioning

confidence: 99%

Craniovertebral anomalies associated with pituitary gland duplication

Milić

Samardžić²,

Djorić³

et al. 2015

Folia Morphol

View full text Add to dashboard Cite

show abstract

“…18) Segmental fixation has become popular for occipitocervical fixation, because of the increased stability and higher fusion rate. 1,3,15) The midline plate-screw technique is the most widely used for occipital fixation, but the occipital screw is associated with the risk of epidural hematoma and dural sinus injury, and alignment of the occipital screw with the cervical screw may be difficult. 17) Midline occipital screw insertion usually provides good screw purchase because the middle of the occiput is thicker than the lateral part.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical and Morphometric Evaluation of Occipital Condyle for Occipitocervical Segmental Fixation

Hong

Takigawa

Sugisaki

et al. 2011

Neurol. Med. Chir.(Tokyo)

View full text Add to dashboard Cite

Two recent novel techniques of occipital fixation are the occipitoatlantal (C0-C1) transarticular screw technique and the direct occipital condyle screw technique. The present study evaluated and compared the biomechanical stability of the direct occipital condyle screw and C0-C1 transarticular screw with the established method for craniocervical spine fixation using the midline occipital keel screw and C1 lateral mass screw. Morphometric evaluation of the occipital condyle and the hypoglossal canal was performed to avoid hypoglossal nerve injury during the screw placement. Thirteen recently frozen cadaveric specimens were used. The occipital condyle anatomy and the hypoglossal canal dimension were measured using reconstructed computed tomography images. Insertion torque and pullout strength were evaluated to compare the midline occipital keel screw, C0-C1 transarticular screw, C1 lateral mass screw, and direct occipital condyle screw. The dimensions of the occipital condyle allow use of a 3.5 or 4.0-mm diameter screw. Mean pullout strength was 1619.6 N for the midline occipital keel screw, 870.7 N for the C0-C1 transarticular screw, 707.0 N for the C1 lateral mass screw, and 431.7 N for the direct occipital condyle screw. Mean insertion torque was 0.55 Nm for the midline occipital keel screw, 0.32 Nm for the C0-C1 transarticular screw, 0.14 Nm for the C1 lateral mass screw, and 0.11 Nm for the direct occipital condyle screw. The condylar anatomy allows direct insertion of the occipital condyle screw and C0-C1 transarticular screw. These techniques are suitable options for the treatment of craniovertebral junction instabilities in selected patients.

show abstract

“…[1][2][3][4][5] The absence of posterior cervical vertebral elements around the craniovertebral junction may predispose to instability of this region.Cervical Spine Dysmorphism: Report of Two Unusual Cases of Craniovertebral JunctionA AB BS S T TR RA AC CT T Cra ni o cer vi cal junc ti on ano ma li es are ra re and the ir clas si fi ca ti on is con si de rably comp lex. He re we re port two unu su al ca ses of cer vi cal spi ne dysmorp hism pre sen ting with the ab sen ce of pos te ri or ver teb ral ele ments which are al so ac com pa ni ed with Wil der vanck syndro me and hydrocep ha lus.…”

mentioning

confidence: 99%

“…[1][2][3][4][5] The absence of posterior cervical vertebral elements around the craniovertebral junction may predispose to instability of this region.…”

mentioning

confidence: 99%

Cervical Spine Dysmorphism: Report of Two Unusual Cases of Craniovertebral Junction

Dağlıoğlu¹,

Alanay²,

Özdöl³

et al. 2010

Turkiye Klinikleri J Med Sci

View full text Add to dashboard Cite

2052ranio-cervical junction (CCJ) abnormalities rarely present with absence of posterior cervical elements and partial agenesis of occipital bone. [1][2][3][4][5] The absence of posterior cervical vertebral elements around the craniovertebral junction may predispose to instability of this region.Cervical Spine Dysmorphism: Report of Two Unusual Cases of Craniovertebral JunctionA AB BS S T TR RA AC CT T Cra ni o cer vi cal junc ti on ano ma li es are ra re and the ir clas si fi ca ti on is con si de rably comp lex. He re we re port two unu su al ca ses of cer vi cal spi ne dysmorp hism pre sen ting with the ab sen ce of pos te ri or ver teb ral ele ments which are al so ac com pa ni ed with Wil der vanck syndro me and hydrocep ha lus. The first ca se was a 17-ye ar-old fe ma le who pre sen ted with short sta tu re, bro ad neck, coar se vo i ce, de af ness as well as bi la te ral la te ral ga ze pa re sis. Cer vi cal com pu te ri zed to mog raphy (CT) and mag ne tic re so nan ce ima ging (MRI) re ve a led the ab sen ce of pos te ri or ver teb ral ele ments of cervi cal spi ne inc lu ding par ti al age ne sis of su boc ci pi tal bo ne, ro ta ti o nal de for mity of cer vi cal co lumn, Chi a ri ab nor ma lity and cystic ca vi ta ti on of cer vi cal spi nal cord. Ad di ti o nally dex tro car di a, which has not be en de fi ned as a fe a tu re of Wil der vanck syndro me yet, was a mar ked fe a tu re of chest X-ray. The se cond ca se was a 32-ye ar-old ma le pre sen ting with comp la ints of ga it dis tur ban ce, dyspho ni a, seve re neck pa in, short sta tu re and sco li o sis. Cer vi cal X-ray, CT and MRI re ve a led se ve re ba si lar in vagi na ti on, ab sen ce of dor sal ele ments of first two cer vi cal ver teb ra e and hydro cep ha lus. Des pi te the ab sen ce of who le pos te ri or cer vi cal ver teb ral ele ments and even oc ci pi tal bo ne, ba si lar in va gi na ti on was not a pre do mi nant fe a tu re in the first ca se. We conc lu de that pre sen ce of a stab le li ga men to us struc tu re only in an te ri or cer vi cal co lumn may ha ve con tri bu ted to the strength of cra ni o cer vi cal junc ti on and exp la ins the ab sen ce of ba si lar in va gi na ti on for Ca se 1.

show abstract

Fusions at the craniovertebral junction

Abstract: Abnormal cervical spine growth was not seen in children who underwent craniocervical stabilization below the age of 5. The authors have reserved rigid instrumentation for children above the age of 10 years and dependent on the anatomy.

Cited by 148 publications

References 54 publications

Craniovertebral anomalies associated with pituitary gland duplication

Craniovertebral anomalies associated with pituitary gland duplication

Biomechanical and Morphometric Evaluation of Occipital Condyle for Occipitocervical Segmental Fixation

Cervical Spine Dysmorphism: Report of Two Unusual Cases of Craniovertebral Junction

Contact Info

Product

Resources

About