In vivo and in vitro CT analysis of the occiput

Hertel, G; Hirschfelder, H.

doi:10.1007/s005860050123

Cited by 14 publications

(14 citation statements)

References 32 publications

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“…However, if the measurements are performed directly from cadavers or radiographic images of subjects, most studies report a relatively small sample size or were performed in the Euro-American and Asian populations. In this study, we focus on measuring the thickness of the [16], no statistically significant gender difference could be found in our patients as reported by many authors [14,15,17].…”

Section: Discussionmentioning

confidence: 81%

Computed Tomographic Morphometric Study of the Occipital Bone Thickness in 100 Adult, Moroccan Patients

Hilmani¹,

Trezor²

2016

J Spine

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Background: Occipital cervical fixation (OCF) is an important and difficult technic and has certain risks due to its relation with adjacent special anatomic features. One of specific areas to perform screw fixation and to prevent technical failures is the thickness of the occipital bone which require detailed morphological anatomical knowledge. To our knowledge, no published study has provided thicknesses of occiput in African Continent.

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Section: Discussionmentioning

confidence: 81%

Computed Tomographic Morphometric Study of the Occipital Bone Thickness in 100 Adult, Moroccan Patients

Hilmani¹,

Trezor²

2016

J Spine

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“…Ebraheim et al 3 reported that 8-mm screws should be inserted up to 2 cm lateral from the midline at the level of the EOP, 1 cm from the median crest at a level 1 cm inferior to the protuberance, and 0.5 cm from the crest at a level 2 cm inferior to the protuberance. Hertel and Hirschfelder 10 and Naderi et al 14 reported that the area > 8 mm thick was up to 1 cm lateral to the EOP at the level of the superior nuchal line and 2 cm inferior to the EOP. In our study, the area was 2 cm lateral to the EOP at the level of the superior nuchal line and 3 cm inferior to the EOP.…”

Section: Discussionmentioning

confidence: 99%

“…6,10,14,17,23 For instance, Grob et al, 6 who used CT, reported average thicknesses of 14 mm at the center of the superior nuchal line, 6.6 mm at the right paramedian, and 5.7 mm at the left paramedian. Moreover, these authors recommended inserting the screw at the median of the occipital bone.…”

Section: Discussionmentioning

confidence: 99%

Mapping occipital bone thickness using computed tomography for safe screw placement

Morita¹,

Takebayashi²,

Takashima³

et al. 2015

SPI

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OBJECT Safe and effective insertion of occipital bone screws requires morphological analysis of the occipital bone, which is poorly documented in the literature. The authors of this study present morphological data for determining the area of screw placement for optimal internal fixation. METHODS The subjects of this institutional review board-approved retrospective study were 105 individuals without head and neck disease who underwent CT imaging at the authors’ hospital. There were 55 males and 50 females, with a mean age of 57.1 years (range 20–91 years). Measurements using CT were taken according to a matrix of 55 points following a grid with 1-cm spacing based on the external occipital protuberance (EOP). RESULTS The maximum thickness of the occipital bone was at the level of the EOP at 16.4 mm. Areas with thicknesses > 8 mm were more frequent at the EOP and up to 2 cm in all directions, as well as up to 1 cm in all directions at a height of 1 cm inferiorly, and up to 3 cm from the EOP inferiorly. The male group tended to have a thicker occipital bone than the female group, and the differences were significant around the EOP. The ratio of the trabecular bone to the occipital bone thickness was > 30% in the central region. At positions more than 2 cm laterally, the ratio was < 15%, and the ratio gradually decreased further laterally. CONCLUSIONS Screws that are 8 mm long can be placed in the area extending 2 cm laterally from the EOP at the level of the superior nuchal line and approximately 3 cm inferior to the center. These results suggest that it may be possible to effectively insert a screw over a wider area than the conventional reference range.

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“…Все винты проводят в затылочную кость бикортикально в соответствии с разработанной техникой с помо-щью ручных фрез. При разработке технологии принимали во внимание результаты исследований, касающихся особенностей рельефа и параметров поперечного сечения затылочной кос-ти в различных ее отделах [1,31,3].…”

Section: материал и методыunclassified

Posterior Fusion in Cervical Spine Surgery

Корж¹,

Barysh²

2010

Hir. pozvonoč.

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In vivo and in vitro CT analysis of the occiput

Cited by 14 publications

References 32 publications

Computed Tomographic Morphometric Study of the Occipital Bone Thickness in 100 Adult, Moroccan Patients

Computed Tomographic Morphometric Study of the Occipital Bone Thickness in 100 Adult, Moroccan Patients

Mapping occipital bone thickness using computed tomography for safe screw placement

Posterior Fusion in Cervical Spine Surgery

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