Rapid Maxillary Expansion With the Custom-made Palatal Anchorage: a Case Report

Background : Rapid Maxillary expansion(RPE) with the tooth-born appliance is not sufficient to apply to the patients with periodontal problem or insufficient tooth anchorage, and it leads to tipping of the anchorage teeth and increasing teeth mobility and root resorption. To avoid these disadvantages, we present the case using palatal screws and custom-made Hyrax.

Material and Method: A patient underwent surgically assisted rapid maxillary expansion with the Hyrax expansion using 4 screws. The study models were used to measure the pre-/-post surgical width of the anterior and posterior dental arches with a digital sliding caliper.  

Results : The custom-made hyrax is suitable for delivering a force to the mid-palatal suture expansion. And it is low cost, small sized and simply applied.  

Conclusion: The results indicated that maxillary expansion with the custom-made palatal anchorage device is predictable and stable technique without significant complications in patients.

References: 1. Miniscrew-assisted nonsurgical palatal expansion before orthognathic surgery for a patient with severe mandibular prognathism. J orthod Dentofacial Otho p2010; 137:830-9)

                    2. Application of a new viscoelastic finiteelement method model and analysis of miniscrew-supported hybrid hyrax treatment. Am J Orhthod Dentofacial Orthop 2013;143:426-35)