Changes in vertical dimension: Extraction versus non-extraction
Introduction: To evaluate and compare the vertical changes in patients treated orthodontically with or without different patterns of premolars extraction.
Materials & Method: The lateral cephalograms of 112 orthodontically treated patients were categorized into four groups of 28 each based upon extraction strategy. Cephalometric analysis comprised of 3 angular and 8 linear measurements were used to analyze vertical changes from pre- to post treatment.
Result: Active orthodontic treatment with or without various premolar extraction therapies led to a statistically significantly increase in the anterior facial height. Second premolar extraction resulted in significantly greater forward movement of the maxillary and mandibular first molars compared to non-extraction therapy.
Conclusion: Active orthodontic treatment resulted in no significant changed in maxillary to mandibular (MM) angle with or without extraction therapy.
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