Ambreen Afzal, Imtiaz Ahmed.
Leveling curve of Spee and its effect on Mandibular arch length.
J Coll Physicians Surg Pak Jan ;16(11):709-11.

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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