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Evaluation of dental midline position
1Department of Orthodontics, School of Dentistry, Virginia Commonwealth University, Richmond 23298-0566, USA.
Seminars in Orthodontics
|November 10, 1998
Summary
The average acceptable maxillary dental midline deviation from the facial midline is 2.2 mm. Orthodontists and dentists are less tolerant of midline deviations than patients.
Area of Science:
- Dentistry
- Orthodontics
- Facial Aesthetics
Background:
- Maxillary midline position is crucial for orthodontic treatment planning.
- Achieving perfect midline alignment can be challenging and complicated by other facial asymmetries.
Purpose of the Study:
- To determine the aesthetic tolerance for maxillary dental midline deviation.
- To assess the impact of various midline facial landmark positions on overall facial aesthetics.
Main Methods:
- 120 participants (orthodontists, dentists, patients, parents) evaluated digitally altered images.
- Participants rated dental midline deviation acceptability and landmark importance.
Main Results:
- The mean acceptable maxillary dental midline deviation was 2.2 mm.
- Orthodontists and dentists showed lower tolerance for deviations than patients.
- Deviations in the maxillary midline and/or nose significantly reduced aesthetic appeal.
Conclusions:
- Aesthetic guidelines for maxillary midline deviation are established.
- Professional evaluations of midline aesthetics differ from patient perceptions.
- Maxillary and nasal symmetry are key factors in perceived facial aesthetics.