Ambreen Afzal, Imtiaz Ahmed, Rauf Shah.
Leveling with continuous archwires and its effect on mandibular arch length in extraction and non-extraction cases.
J Surg Pak Jan ;9(4):6-9.

Objective: To compare the mandibular arch length changes during leveling of curve of Spee in extraction and non-extraction cases. Study Design: Quasi-experimental, interventional. Setting: Orthodontic department, Karachi Medical & Dental College Subjects: Forty cases were divided into extraction and non-extraction group. Methods: Depth of curve of Spee and arch length were measured on 40 pretreatment and post-treatment plaster models with the help of sharpened Boley gauge. Results: The arch length proved to be significantly different (P< .022) between extraction and non-extraction cases. Conclusion: During leveling of curve of Spee the mandibular arch length in nonextraction cases significantly increased than in extraction cases.

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