[The effect of sagittal position of temporomandibular joint on development of Class I, II and III].
The scope of this paper is to estimate the effect of T-TM distance and mandibular length on sagittal jaw relationship. Examination was done on profile X-rays of 100 out-patients of Dental Clinic in Nis, divided into groups of class I, II and III according to angle PgA/SpP. The following parameters were analysed: Frankfurter horizontal, length of the maxillary corpus, mandibular length and T-TM distance. The following combinations were found: 1. Sagittal jaw relation is determined by T-TM distance with similar value of maxillary corpus and mandibular length. The shortest T-TM distance is in class III and the longest in class II. II. Sagittal jaw relation depends exclusively on mandibular length. Shorter mandible with similar values of maxillary corpus and T-TM distance give class II, while longer mandible will produce class III. III. Emphasizing effect--longer mandible and shorter T-TM distance and shorter mandible make distal jaw formation more emphasized. IV. Compensating effect--short T-TM distance and shorter mandible give class I instead of expected class III, while longer mandible compensates long T-TM distance forming class I instead of class II skeletal relationship.
Tijanić
L
L
Medicinski Fakultet, Nis.
Janosević
M
M
D002508:Cephalometry; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000209:etiology* / Q000503:physiopathology; D008334:Mandible / Q000254:growth & development*; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000503:physiopathology*
Uloga sagitalnog polozaja temporomandibularnog zgloba u nastanku I, II i III Klase.