Mohamed S. Abd El Raouf, Ahmed Abd El-Fatah Ramadan, Walid E. Refaat And Gihan Gamal El-Desouky,

ABSTRACT
Objective: To Study The Correlation Between The Position Of Impacted Maxillary Canines And The Morphology Of The Maxilla Using Cone Beam Computed Tomography (CBCT).

Materials and Methods: The Sample Consisted Of 90 CBCT Records, Divided Into 3 Groups, The Normally Erupting Maxillary Canine Group (control Group) Comprised 30 Subjects (17 Male, 13 Female) While The Buccally Impacted Canine Group Comprised 30 Subjects (13 Male, 17 Female) And The Palatally Impacted Canine Group Comprised 30 Subjects (14 Male, 16 Female). All CBCT Images Were Acquired Using Planmeca ProMax? 3D Mid (Helsinki, Finland ). A CBCT Records Were Selected To Be Done Before Any Surgical Or Orthodontic Intervention. For Each Patient Image The Maxillary Basal Bone Width, Intermolar Width, Palatal Vault Depth And Width Of The Nasal Cavity Were Measured. Arch Length/intermolar Width X 100 Was Used As The Value For Comparison Of Maxillary Arch Shapes, And Palatal Vault Depth/intermolar Width X 100 Was Used To Compare The Shapes Of Palate Between The 3 Groups.

Results: The Palatal Vault Depth/intermolar Width X 100 Formula Showed Statistically Significant Differences (p=0.05), Indicating Differences In The Shapes Of Palate Among All Groups. Also Statistically Significant Differences Were Found In Comparison Of The Nasal Cavity Widths Among All Groups. However, Similar Maxillary Transverse Dimensions, Both Skeletally And Dentally, Were Found Among All Groups. Conclusion: The Maxillary Transverse Width, Both Skeletally And Dentally, Was Not Related To The Occurrence Of Palatally Or Buccally Impacted Canine. The Palatally Impacted Canine Group Had A Significantly Deeper Palatal Vault Than Did The Buccally Impacted Canine Group. Nasal Cavity Width Is Significantly Narrower In Buccal Impaction Group Than In The Palatal Impaction And Control Groups.