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The aim of this paper was to investigate factors that define sagital
position of temporomandibular joint at patients with Class II division 2
malocclusion. Examination included 48 lateral cephalograms of patients
(23 males and 25 females, age 15-28 years) with this malocclusion. The
following parameters were analyzed: NSBa, SNA, SNB and ANB angles,T-TM
distance, length of maxillary and mandible corpus and ramus in relation
to the length of anterior cranial base and diagonal length of mandible.
Attained values were compared with standard values for same parameters.
The results of analysis showed that patients with Class II division 2
malocclusion had cranial base angle that didn’t significantly differ in
relation to standard values, while ANB
angle values indicated mild form of distal occlusion. Patients with this
malocclusion had reduced length of maxillary corpus and increased
diagonal length of mandible corpus and mandible ramus. Attained data
indicate that distal sagital jaw relationship at patients with Class II
division 2 malocclusion is result of increased T-TM distance as
consequence of reduced length of maxilla corpus, while length of
mandible corpus was not changed, but TMJ is posteriori located due to
the increased length of anterior and posterior cranial base.
Key words: Class II division 2 malocclusion, sagital position of
TMJ, T-TM distance |