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Variability of the dental surface: effects on orthodontic treatment
1Department of Odontostomatologic Science, Università La Sapienza, Rome. gabriella.galluccio@uniroma1.it
Objectives:
The Author studied the variability of the vestibular surfaces of tooth usually involved in orthodontic treatment.
Materials And Methods:
200 model casts of Italian subject with complete permanent dentition have been analyzed studying the clinical crown dimension and the angulations of tangents drawn at 3 and 4 mm.
Results:
The authors found differences in the vestibular surfaces curvature in the last teeth of each series, more accemptuated in the lower than in the upper arch.
Conclusion:
The conclusions of this study are related to the use of orthodontic straight wire appliances. The use of standard values with a complete torque, independently from the individuals, is based on the hypothesis of equal positioning on the tooth surface and related to the teeth axis. A variation in the torque of the upper central incisor for different kinds of straight wire appliance related to extreme variation of vestibular curvature is hypothesised.
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