Impacted teeth: Their place is in the dental arch

ABSTRACT The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events may be guided and directed, so that teeth may occupy the space prepared to receive them in the dental arch, as showed in the case presented to evidence the following principle to be considered in these cases: "Regardless of the position of an unerupted tooth, it may be biologically directed to its place in the dental arch. The orthodontist should apply a mechanics to guide it and park it at its site."

RESUMO Os dentes não irrompidos devem ter como ponto de partida, para seu tratamento, o fato de que biologicamente o folículo pericoronário mantém ao longo do tempo a capacidade de liberar o EGF e outros mediadores responsáveis pela erupção. Pode-se guiar e direcionar os eventos eruptivos para que os dentes ocupem o seu espaço preparado para recebê-los na arcada dentária, como revela o caso apresentado para sedimentar o seguinte princípio a ser considerado para esses casos: "Independentemente da posição que um dente não irrompido se apresente, há como, biologicamente, direcioná-lo para o seu local na arcada dentária. Cabe ao ortodontista aplicar uma mecânica que o leve até o local e lá o estacione."

Diagnosis of maxillary impacted maxillary anterior teeth by CBCT and the treatment / 实用口腔医学杂志

Objective:To investigate the efficiency of CBCT in the diagnosis of impacted maxillary anterior teeth and the treatment effect of different guided eruption methods. Methods:34 impacted maxillary anterior teeth in 30 patients were examined by panoramic films and CBCT, the dental crowns, root, eruption space and other related items were measured and compared between 2 examinations. 20 cases were treated by closed guided eruption and traction( CGET) technique, 10 cases by circumferential supracrestal fibrotomy and exposed traction( CSF-EE) , results were compared. Results: CBCT was more effective than panoramic films in the revelation of tooth root bending, apical pore closure and eruption measurements(P<0. 05). 7-10 d after treatment 5 out off the 10 casses treated by CSF-EE showed different degrees of clinical crown elongation, poor gum appearance and low height of alveolar ridge as insufficient periodontal attachment. However, the treatment of CGET for 26 teeth (76. 47% of all cases) was highly successful and received very satisfactory re-sults, the rest 8 teeth (23. 53% of all cases) showed mediocre satisfaction. Conclusion: CBCT can accurately display the position, shape, relation with adjacent teeth of the impacted teeth. Closed guided eruption and traction is more effective for the treatment.