[Variants of ossification of the stylohyoid chain].
OBJECTIVE
Evaluation of age-related differences in the incidence, length and topographic location of ossifications in the stylohyoid chain.


METHODS
Panoramic radiographs of 380 patients (718 reviewed stylohyoid chains), subdivided into 4 age groups (up to 20 years, 21 to 40 years, 41 to 60 years, older than 60 years), were reviewed and examined for the incidence, length and topographic location of stylohyoidal ossification.


RESULTS
221 (30.8%) of 718 reviewed stylohyoidal chains showed radiological variants (elongation of the stylold process and/or ossification of the stylohyoid ligament). With increasing age, there was an increase in the incidence and length of stylohyoidal ossifications (p < 0.01). A significant linear correlation between the length of the stylohyoidal ossifications and age was only found in the young age group (up to 20 years; p < 0.01). In the young age group(up to 20 years), there was also a preferred presence of isolated locations in the superior stylohyoidal segment. With increasing age, there was a pronounced presence of ossifications in the middle and inferior stylohyoid segments and combinations of ossified varibilities.


CONCLUSIONS
Stylohyoidal ossifications show age-related differences in incidence, length and topography and can also be put down to different pathological events. Stylohyoidal ossifications gain a different importance in adult patients from that in young people.
Krennmair
G
G
Universitätsklinik für Zahn-, Mund- und Kieferheilkunde, Universität Wien. Krennmair@aon.at
Lenglinger
F
F
Lugmayr
H
H
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D006801:Humans; D006928:Hyoid Bone / Q000000981:diagnostic imaging*; D015994:Incidence; D008022:Ligaments / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging*; D011862:Radiography, Panoramic; D013701:Temporal Bone / Q000000981:diagnostic imaging*