Taher Talaat Ragab Hefny, Safaa Ali Ali Ghobashy And Atia Abd Elwareth Yousif,

ABSTRACT


Introduction: Dento-alveolar Dimensions Is Believed To Be One Of The Important Considerations In Treatment Planning Of Orthodontic Cases The Importance Of Dento-alveolar Dimensions Lies In Its Effect On Achieving A Sound Anteroposterior Orthodontic Tooth Movement Of Upper And Lower Incisors In Patients With Different Vertical Facial Patterns. Aim Of The Work: The Purpose Of This Study Was To Evaluate Dentoalveolar Dimensions In The Tooth-bearing Region Of The Jaws, In The Anterior As Well As The Posterior Region, Among Subjects With Different Vertical Facial Patterns In A Group Of Adults.

Materials and Methods: From A Sample Of 650 Lateral Cephalometric, 150 Scans Were Selected (75 Males And 75 Females) To Be Included In The Study. The Sample Was Divided Into High Angle (SN-MP > 37?), Low Angle (SN-MP?< 27?) And Average Angle (SN-MP 32?5?) Groups. The Anteroposterior And Vertical Dimensions Of The Alveolus Surrounding The Root Apex Of Anterior And Posterior Teeth Were Calculated.

Results: Compared To The Other Two Groups, High Angle Group Had Larger Anterior Dentoalveloar Height, With No Significant Difference In Alveolar Height Posteriorly In Both Maxilla And Mandible. On The Other Hand Low Angle Group Presented With Wider Alveolus Anteriorly In The Maxilla, While High Angle Group Had Thinner Alveolus In Both Maxilla And Mandible, Which Considered As A Limitation For Intrusive Movement Of Anterior Teeth. Conclusion: The Findings Of The Present Study Tend To Support The Prescence Of An Association Between Facial Patterns And Alveolar Dimensions. The Compensatory Changes In The Anteior Maxillary And Mandibular Dentoalveolar Dimensions That Associated With High And Low Angle Cases Should Be Considered By The Clinicians While Planning Treatment For Them, To Avoid Post Treatment Instability And/or Iatrogenic Sequelae. And Low Angle Cases Should Be Considered By The Clinicians While Planning Treatment For Them, To Avoid Post Treatment Instability And/or Iatrogenic Sequelae.