Semester

Spring

Date of Graduation

2012

Document Type

Thesis

Degree Type

MS

College

School of Dentistry

Department

Orthodontics

Committee Chair

Peter Ngan

Committee Co-Chair

Chris Martin

Committee Member

Timothy Tremont

Abstract

Objectives: To evaluate and compare the anteroposterior relationship of the maxillary central incisors to the forehead in adult Korean females with harmonious profiles and in adult Korean female orthodontic patients. Methods: Ninety five photographic images of adult Korean females with good facial harmony (control group) were compared with 95 photographs of adult Korean females seeking orthodontic treatment (study group). All images were of the face in profile with the maxillary central incisors and the forehead in full view. The images were imported into Adobe Photoshop(TM) and resized and rotated to the upright head position. Reference lines were constructed to assess the anteroposterior positions of the maxillary central incisors as well as forehead inclinations. Results: In the control sample, 74% had maxillary central incisors positioned between the FFA point and glabella, 18% posterior to the FFA point, and 7% anterior to glabella. In the study sample, 36% had maxillary central incisors positioned between the FFA point and glabella, 18% posterior to the FFA point, and 44% anterior to glabella. The difference between the means for the anteroposterior maxillary incisor position were statistically significant (P=0.0004). The positions of the maxillary central incisors were correlated with the forehead inclination both in the control and the study group (p<0.0001). Conclusion: The forehead can be an important landmark for anteroposterior maxillary central incisor positioning for adult Korean female patients seeking improved facial harmony.

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