The aim of this study is to evaluate and compare the effect of rapid maxillary expansion with and without microosteoperforation in patients with skeletal maxillary constriction.Theoretically, the force generated by the activation of the Hyrax expander leads initially to the compression of the periodontal ligament, bending of the alveolar bone, and tipping of the anchor teeth. This in turn contributes to the unfavorable changes in the supporting tissues; such as root resorption, buccal crown tipping, reduction of buccal bone thickness, marginal bone loss and alveolar bone fenestration and dehiscence. In this trial, it is assumed that by reducing the cortical bone resistance, using micro-osteoperforation (MOP), the alveolar bone bending and buccal tipping that usually occur during expansion will be reduced and thus facilitating the bone expansion.
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Dental tipping.
Timeframe: an average1 year
Alveolar bending
Timeframe: an average1 year
Dental changes(transverse).
Timeframe: an average1 year
Skeletal changes(transverse, anteroposterior and vertical)
Timeframe: an average1 year