Spine · 2006
The median atlanto-occipital joint in advanced age.
СтатьяНазвание и аннотация: Перевод в очереди
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Von Lüdinghausen Michael, Prescher Andreas, Kageya Ikuo, Yoshimura Ken
Аннотация
STUDY DESIGN: Exploration of the craniocervical junction in cadavers of elderly individuals.
OBJECTIVE: Histologic evaluation of osseous contact zones observed between the basiocciput and anterior arch of the atlas.
SUMMARY OF BACKGROUND DATA: Previous findings of possible osseous contact zones at the anterior rim of the foramen magnum and anterior arch of the atlas suggested the existence of real joints.
METHODS: A total of 100 cadaver specimens were investigated using magnetic resonance imaging, computerized tomography, and median saw-cut and histologic sections.
RESULTS: Of the specimens, 42% showed osteoarthritis-related osteophytes (primarily directed cranially) of the articular surfaces of the median atlantoaxial joint. In 5 cases, a large osteophyte of the anterior arch of the atlas touched the basiocciput. In 3 cases, a third occipital condyle touched the anterior arch of the atlas and/or tip of the dens. These osseous contact zones were histologically verified as real joints (the median atlanto-occipital or occipito-odontoid joints).
CONCLUSIONS: Of the 8 median atlanto-occipital joints found in this study, 3 were third occipital-condyle based, and 5 osteoarthritis-based. The former were congenital in character, while the latter were acquired.
OBJECTIVE: Histologic evaluation of osseous contact zones observed between the basiocciput and anterior arch of the atlas.
SUMMARY OF BACKGROUND DATA: Previous findings of possible osseous contact zones at the anterior rim of the foramen magnum and anterior arch of the atlas suggested the existence of real joints.
METHODS: A total of 100 cadaver specimens were investigated using magnetic resonance imaging, computerized tomography, and median saw-cut and histologic sections.
RESULTS: Of the specimens, 42% showed osteoarthritis-related osteophytes (primarily directed cranially) of the articular surfaces of the median atlantoaxial joint. In 5 cases, a large osteophyte of the anterior arch of the atlas touched the basiocciput. In 3 cases, a third occipital condyle touched the anterior arch of the atlas and/or tip of the dens. These osseous contact zones were histologically verified as real joints (the median atlanto-occipital or occipito-odontoid joints).
CONCLUSIONS: Of the 8 median atlanto-occipital joints found in this study, 3 were third occipital-condyle based, and 5 osteoarthritis-based. The former were congenital in character, while the latter were acquired.