Syed Shah Faisal, Mohammad Hasnain Sakrani, Beenish Elahee Rizvi, Huma Siddique.
Change in arch width after extraction and non extraction treatment.
Ann Abbasi Shaheed Hosp Karachi Med Dent Coll Jan ;19(1):32-6.

Objective: The aim of this study was to compare the arch width dimension after extraction and non extraction in pre and post orthodontic treatment. Methods: Comparative cross sectional study was carried out in the Orthodontics Department of Alvi Dental Hospital, Karachi, from June to December 2010. Non probability, purposive type of sampling technique was used for data collection. Our sample consists of sixty patients, of which the extraction group was n= 30 (50%) and non extraction group n=30 (50%). Pre treatment and post treatment intercanine (Anterior) and intermolar (Posterior) arch widths of maxillary and mandibular arch was calculated on cast and compared statistically. Results: In extraction group maxillary intercanine width was 0.70 mm and mandibular intercanine arch width was 0.18 mm larger than non extraction group. In extraction group maxillary intermolar width was 1.65 mm and mandibular intermolar width was 1.3 mm smaller than non extraction group. Conclusion: Extraction treatment did not result in narrower dental arches as compared to non extraction treatment.

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