The role of permanent first molar relationship in assessing class ii malocclusions based on the analysis of diagnostic models from the palatal side.
AIM
The aim of the work is to determine the significance of posterior relationship between the first upper and lower molars from the palatal side in diagnosing Class II malocclusions.


MATERIAL AND METHODS
One hundred and fifty diagnostic models and lateral cephalograms of patients from the Zbigniew Żak District Memorial Outpatient Clinic in Cracow were assessed.


RESULTS
Out of 150 patients, skeletal Class II was diagnosed in 108 patients based on measuring the ANB angle (>4°), and in 115 patients based on the Wits appraisal (≥2 mm). In 68 patients (45.3%) with a bilateral complete posterior relationship of permanent first molars from the palatal side, skeletal Class II was confirmed on the basis of the ANB angle (>4°). In 3 patients (2%) skeletal Class II did not occur, despite a bilateral complete posterior relationship of permanent first molars from the palatal side. In 69 patients (46%) with a bilateral complete posterior relationship of permanent first molars from the palatal side, skeletal Class II was confirmed by means of the Wits appraisal. Only in 2 patients (1.3%), skeletal Class II did not occur despite a bilateral complete posterior relationship of permanent first molars from the palatal side.


CONCLUSIONS
The occurrence of a bilateral complete posterior relationship of permanent first molars from the palatal side constitutes a very reliable predictive parameter of skeletal Class II. Diagnosing a correct first molar relationship from the palatal side leads to a high probability that skeletal Class II does not occur.
['Marcinkowska-Mituś|Agata|A|', 'Mizerska-Żurowska|Anna|A|', 'Mituś-Kenig|Maria|M|', 'Łoboda|Magdalena|M|', 'Pawłowska|Elżbieta|E|']
D000328:Adult D002508:Cephalometry D005260:Female D006801:Humans D008297:Male D008312:Malocclusion, Angle Class II D008963:Molar D010159:Palate D011044:Poland D011379:Prognosis D011859:Radiography
class II malocclusions diagnostics models