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Managing the stability of the transverse dimension after maxillary expansion is a serious problem because of the high rate of relapse, and studies are necessary for improving management and ensuring its sustainability. The correction of dysfunction is essential to avoid any possible relapses in the transverse dimension. Evolution of orthodontic philosophy The therapeutic indication for avulsions as a treatment option has varied since Fauchard 26 , pioneer of modern dentistry, who treated dental irregularities by expanding the arches. There are two opposing extreme approaches: systematic preservation of all the teeth by expansion or avulsion to comply with cephalometric and aesthetic standards. Relying on the laws set by Roux and Wolff affirming the predominant influence of functional factors on morphogenesis, Angle attributed the role of functional stimulation of the growth of the bone bases to