Miniplates with A New Design As Skeletal Anchorage for Intrusion of Posterior Maxillary Segment During Correction of Skeletal Anterior Open Bite (A Cohort Clinical Study)

Abstract

Objective: This study aimed to evaluate the effect of newly designed miniplates that used as skeletal anchorage for maxillary molars’ intrusion during correction of skeletal anterior open bite (SAOB).Subjects and Methods: A sample of 22 patients with an age range from 14 to 22 years, suffering from skeletal anterior open bite (SAOB) with increased posterior maxillary vertical height. A new designed custom-made miniplates used after adaptation on 3D model of maxilla for every patient. They were used as buccal skeletal anchorage for maxillary molars’ intrusion. The measurements, including maxillary dento-alveolar heights (mm), buccal crestal alveolar bone heights (mm), bucco-palatal angulations (B-P⁰) of right and left maxillary first permanent molars, 3 months after intrusion commencement.Results: The dento-alveolar height as well as the buccal crestal alveolar height decreased significantly (p ≤ 0.001 and p ≤ 0.05, respectively) after intrusion. Similarly, the B-P angulations increased significantly (p ≤ 0.01) after intrusion.Conclusion: New custom-made preadapted miniplates’ designs were effective for posterior maxillary molar intrusion in cases of SAOB. Both the posterior maxillary dento-alveolar and buccal crestal alveolar bone heights diminished significantly.