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Leveling curve of Spee and its effect on mandibular arch length
1Department of Orthodontics, Karachi Medical and Dental College, Karachi.
Objective:
To determine the additional space required for leveling of curve of Spee in the mandibular arch by continuous arch wire mechanics.
Study Design:
Quasi-experimental interventional.
Setting:
Orthodontics Department, Karachi Medical and Dental College from September 2002 to September 2004.
Subjects And Methods:
Depth of curve of Spee and arch length were measured on 40 pre-treatment and posttreatment plaster models with the help of sharpened Boley gauge.
Result:
The study showed that clinical practice of allowing 1 mm of arch circumference for leveling each millimeter of curve of Spee overestimates the amount of arch space needed to flatten the curve of Spee (p < 0.001).
Conclusion:
The result suggested that the belief that 1 mm of arch circumference was necessary to level each millimeter of curve of spee present was an overestimation.
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