Variations of Sagital Maxillomandibular Relations in Orthodontic Anomalies and Neutro-occlusions

Istraživanje je poduzeto sa svrhom da se definiraju sagitalni odnosi maksile i mandibule prema kranijalnoj bazi, kao i međučeljusne relacije u ortodontskih anomalija i eugnate okluzije. Analizirane su varijable SNA, SNB i A N B na 436 laterolateralnih rentgenograma glave ispitanika obaju spolova u dobi od 10 do 18 godina. Eksperimentalna skupina sastojala se od 256 ispitanika, podijeljenih prema kliničkoj dijagnozi u 4 skupine: progenija, klasa IIU, pokrovni zagriz i otvoreni zagriz. Kontrolnu skupinu sačinjavalo je 180 ispitanika eugnate okluzije. Iz statističke obrade proizlazi 9 skeletnih tipova viscerokranija. U eugnatih ispitanika dominira bimaksilarni retrognatizam, bimaksilarni normognatizam i bimaksilarni prognatizam. Kod progenijskog kompleksa najčešći su maksilarni retrognatizam s mandibularnim prognatizmom, bimaksilarni prognatizam te maksilarni retrognatizam s mandibularnim prognatizmom. Kod anomalija klase IIU prevladavaju bimaksilarni retrognatizam, maksilarni normognatizam s mandibularnim retrognatizmom te maksilarni prognatizam s mandibularnim retrognatizmom. Kod otvorenog zagriza prevaliraju bimaksilarni retrognatizam, maksilarni retrognatizam ^ mandibularnim prognatizmom, te bimaksilarni prognatizam.The aim of the study was to define sagittal relations between the maxilla and mandible and the cranial base, and maxillomandibular relations in orthodontic anomalies and neutroocclusions. The SNA, SNB and ANB variables were analyzed in 436 laterolateral head roentgenograms taken in subjects o f both sexes aged 10- -18 years. Study group consisted of 256 subjects divided, according to clinical diagnosis, into 4 groups: class III, class II/l, class M 2 and open bite. Control group had 100 subjects with neutro- -occlusion. Results revealed the presence of combinations of different types of viscerocrania. Thus, bimaxillary retrognathism, bimaxillary normognathism and bimaxillary prognathism were found to predominate in subjects with neutro-occlusion. In the class III groupo f subjects, combinations of maxillary retrognathism with mandibular prognathism and bimaxillary prognathism were most frequently observed. In class M l anomaly, bimaxillary retrognathism, bimaxillary normognathism with mandibular retrognathism and maxillary prognathism with mandibular retrognathism were most frequently recorded. In the group with class III2, bimaxillary retrognathism and a combination of maxillary normognathism and mandibular retrognathism were found to predominate. Bimaxillary retrognathism predominated in open bite