Molar dentoalveolar heights association with some vertical craniofacial measurements in class i skeletal pattern

الملخص EN

Background: Cases with vertical discrepancy have proved to be the most difficult to treat and have the least favorable prognosis.

This study was designed to determine the relationship between maxilbry and mandibular molar dentoalveolar heights and several vertical skeletal variables; and to start up population standard for the vertical position of the maxillary and mandibular 1* molar, in individuals with skeletal and dental class I.

Materials and method: The sample included 60 digital true lateral cephalometric radiographs (33 females and 27 males) which had been taken in the Orthodontic department in the College of Dentistry, University of Baghdad.

They were determined radiographically to have class I skeletal pattern, and clinically to have normal Angle Class I occlusion.

Ten skeletal and two dentoalveolar cephalometric measurements were used to assess vertical facial morphology.

Results: Males had a significantly larger molar dentoalveolar height than the females.

Both in males and females, maxillary and mandibular dentoalveolar heights were significantly positively correlated with anterior total and lower facial heights and posterior facial height.

Ar-Go has higher significant positive correlations in females than males, positive correlations were also found in males between SN-MP angle and motar dentoalveolar heights, and between : PP-MP angle and MxMDH only.

Conclusions: Positive relationship between dentoalveolar and craniofacial heights has been confirmed.

Population standard for the vertical position of the maxillary and mandibular 1st molar, in individuals with skeletal and dental class I, were verified.

The increase in dentoalveolar heights of males show more tendency toward backward rotation of the mandible compared to that of females.