Abstract
Anterior open bite is often caused by a downward rotation of the mandible and/or by excessive eruption of the posterior teeth. In such cases, it is difficult to establish absolute anchorage for molar intrusion by traditional orthodontic mechanics. This article reports the successful treatment of a severe skeletal anterior open bite case using titanium screw anchorage. A female patient of 31 years of age had open bite of 7 mm with increased facial height. The mini screws were implanted on both maxilla and the mandible, and an intrusion force was provided with elastic chains for 13 months. After active treatment of 19 months, her upper and lower first molars were intruded by about 3 mm each, and good occlusion was achieved. Her retrognathic chin and convex profiles were improved by an upward rotation of the mandible. Our result suggests that titanium screws are useful for intrusion of molars in anterior open bite cases.
Highlights
Skeletal anterior open bite is one of the most difficult cases to treat in orthodontics
Treatment of severe skeletal anterior open bite mainly consists of surgically repositioning of the maxilla and the mandible
The present case report demonstrates the usefulness of titanium screws for orthodontic anchorage to intrude the upper and lower molars of an adult patient with severe skeletal anterior open bite
Summary
Skeletal anterior open bite is one of the most difficult cases to treat in orthodontics. Treatment of severe skeletal anterior open bite mainly consists of surgically repositioning of the maxilla and the mandible This is true because adults have little growth potential, and often open bites are combined with a longface tendency.[1,2] there are cases when patients do not wish to undergo surgical treatment because of its risk factors. For such patients, various treatment alternatives include multibrackets in conjunction with high-pull headgear, extraction therapy,[3,4] multiple-loop edgewise archwire (MEAW) technique,[5] and archwire with intermaxillary elastics.[6]. The present case report demonstrates the usefulness of titanium screws for orthodontic anchorage to intrude the upper and lower molars of an adult patient with severe skeletal anterior open bite
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