RESUMO
Anterior open bite is one of the most challenging malocclusions for orthodontic treatment. The high incidence of relapse is a major concern. Therefore, accurate initial examination, diagnosis, treatment plan, and consideration of habitual risk factors are crucial for a successful outcome without unwanted sequelae. Excellent patient compliance for retainer wear is also a critical factor. This case report shows the 3-year stability of a nonsurgical and nonextraction orthodontic treatment of a 5-mm anterior open-bite malocclusion in a 12-year-old girl with extrusion mechanics and habit modification. After 2 years of orthodontic treatment, excellent outcomes were achieved. With an appropriate retention protocol, the long-term stability of the treatment was favorable.
Assuntos
Má Oclusão Classe I de Angle/terapia , Mordida Aberta/terapia , Extrusão Ortodôntica/métodos , Contenções Ortodônticas , Cefalometria/métodos , Criança , Arco Dental/patologia , Feminino , Seguimentos , Humanos , Mandíbula/patologia , Maxila/patologia , Técnica de Expansão Palatina , Planejamento de Assistência ao Paciente , Hábitos Linguais/terapia , Técnicas de Movimentação Dentária/instrumentação , Técnicas de Movimentação Dentária/métodos , Resultado do TratamentoRESUMO
This paper demonstrates an unorthodox method to quickly erupt palatally impacted canines based on sound biomechanical principles. The unwinding of a stainless steel round archwire produces the required occlusobuccal force. Due to its snap-back release, it looks like a trap, which is why it was dubbed mousetrap.
Assuntos
Dente Canino/patologia , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Extrusão Ortodôntica/instrumentação , Dente Impactado/terapia , Fenômenos Biomecânicos , Ligas Dentárias/química , Humanos , Fios Ortodônticos , Aço Inoxidável/química , Estresse Mecânico , Titânio/químicaRESUMO
Loss of the mandibular first molar often leads to the overeruption of the opposing maxillary first molar, resulting in occlusal interference, loss of periodontal bony support, and inadequate room to restore the mandibular edentulous space. Without orthodontic molar intrusion or segmental surgical impaction, restoring the posterior occlusion often entails the need for significant reduction of maxillary molar crown height, with the potential need for costly iatrogenic root canal therapy and restoration. The literature has cited successful maxillary molar intrusion with minor prosthodontic reduction using palatal orthodontic miniscrews and buccal zygomatic miniplates. In this report, the authors present successful maxillary molar intrusion with two orthodontic miniscrews in a patient with extreme dental anxiety and significant dental erosion due to gastric reflux. Using two orthodontic miniscrews for skeletal anchorage to intrude the maxillary molar simplified the orthodontic treatment by eliminating the need for extensive surgery, headgear, and intraoral multiunit anchorage and preserved indispensable tooth enamel. The clinical results showed significant intrusion through the maxillary sinus cortical floor while maintaining periodontal health, tooth vitality, and root length.
Assuntos
Má Oclusão Classe I de Angle/terapia , Dente Molar , Procedimentos de Ancoragem Ortodôntica/métodos , Erupção Dentária , Técnicas de Movimentação Dentária/métodos , Adulto , Parafusos Ósseos , Cefalometria , Ansiedade ao Tratamento Odontológico/complicações , Feminino , Humanos , Procedimentos de Ancoragem Ortodôntica/instrumentação , Erosão Dentária/complicações , Técnicas de Movimentação Dentária/instrumentaçãoRESUMO
BACKGROUND: This article reviews the use of temporary anchorage devices (TADs) for maxillary molar intrusion. TYPES OF STUDIES REVIEWED: The authors reviewed clinical, radiographic and histologic studies and case reports. The studies provided information regarding the application, placement and biological response of orthodontic TADs. RESULTS: TAD-supported molar intrusion is controlled and timely and may be accomplished without the need for full-arch brackets and wires. Supraerupted maxillary first molars can be intruded 3 to 8 millimeters in 7.5 months (approximately 0.5-1.0 mm per month), without loss of tooth vitality, adverse periodontal response or radiographically evident root resorption. CLINICAL IMPLICATIONS: True molar intrusion can be achieved successfully with orthodontic TADs, re-establishing a functional posterior occlusion and reducing the need for prosthetic crown reduction.
