Geometry of the articular facets of the lateral atlanto-axial joints in the case of occipitalization

• Autorzy: Ryniewicz A.M. , Skrzat J. , Ryniewicz A. , Ryniewicz W. , Walocha J.
• Języki publikacji: EN

Abstrakty

EN

This study investigates if atlanto-occipital fusion affects the size and geometrical configuration of the articular facets of the atlanto-axial joint. Morphometric analysis was performed on the male adult skull, the occipital bone of which is assimilated with the first cervical vertebrae (the atlas). The perimeter, Feret’s diameter, surface area, and circularity of the inferior articular fa-cets were measured. However, we did not observe significant bilateral differences in size of the inferior articular facets of the assimilated atlas compared to normal first cervical vertebrae. Geometrical conformation of the articular facets of the atlas and axis was assessed using a coordinate measuring machine (PMM – 12106, Leitz). The results obtained from this machine indicated that the inferior articular facets of the assimilated atlas presented asymmetrical orientation compared to the normal anatomy of the atlas. Hence, in the case of occipitalization, the gap between the articulating facets of the atlas and the axis was measured to be greater than in the normal atlanto-axial joint. Computer assisted tomography was applied to visualise the anatomical relationship between the inferior articular facets of the assimilated atlas and the corresponding facets located on the axis. In this case, radiographic examination revealed that the bilaterally articulating facets (inferior and superior) showed disproportion in their adjustment within the lateral atlanto-axial joints. Thus, we concluded that the fusion of the atlas with the occipital bone altered the geometry of the inferior articular facets of the atlas and influenced the orientation of the superior articular facets of the axis. (Folia Morphol 2010; 69, 3: 147–153)

Słowa kluczowe

EN

geometry; articular facet; craniovertebral joint; occipitalization; morphometric analysis; male; adult; skull; occipital bone

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2010
• Tom: 69
• Numer: 3
• Opis fizyczny: p.147-153,fig.,ref.

Twórcy

autor

Ryniewicz A.M.

• Department of Prosthodontic Dentistry, Collegium Medicum, Jagiellonian University, Krakow, Poland
• Faculty of Mechanical Engineering and Robotics, University of Science and Technology, Krakow, Poland

autor

Skrzat J.

• Department of Anatomy, Collegium Medicum, Jagiellonian University, Kopernika 12, 31-034 Krakow, Poland

autor

Ryniewicz A.

• Laboratory of Coordination Metrology, Krakow University of Technology, Krakow, Poland

autor

Ryniewicz W.

• Department of Prosthodontic Dentistry, Collegium Medicum, Jagiellonian University, Krakow, Poland

autor

Walocha J.

• Department of Anatomy, Collegium Medicum, Jagiellonian University, Krakow, Poland

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