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Evaluation of dental midline position

J W Beyer¹, S J Lindauer

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.

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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.

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