Recontorno gengival e reposicionamento labial cirúrgico para tratamento do sorriso gengival: resultados após um ano / Gummy smile treatment with gingival recontouring and surgical lip repositioning: 1-year follow-up results

O presente artigo teve como objetivo esclarecer as diferentes alternativas utilizadas para o reposicionamento labial e melhora da estética do sorriso, propondo uma nova classificação para o diagnóstico e tratamento do sorriso gengival. A técnica cirúrgica descrita no relato de caso associa o recontorno gengival e o reposicionamento labial com tratamento estético restaurador. A cirurgia realizada proporcionou a correção da erupção passiva alterada dos dentes anterossuperiores, combinada com o alongamento do feixe lateral do músculo levantador do lábio superior e da asa do nariz, e a contenção do mesmo com sutura mononylon, diminuindo o sorriso gengival. Notou-se, após a cirurgia, que a linha alta do sorriso foi corrigida sem comprometer a harmonia labial. A paciente manifestou alto grau de satisfação com o tratamento. O diagnóstico e a técnica cirúrgica proposta neste estudo podem ser uma opção terapêutica para o reposicionamento labial e harmonia do sorriso.

The present article aims to address the different alternatives used for lip repositioning and improved smile aesthetics, proposing a new classification for the diagnosis and treatment of the gummy smile. The surgical technique described this a case report associates gingival recontouring and lip repositioning with restorative aesthetic treatment. The surgery provided the correction of altered passive eruption of the anterior superior teeth combined with lengthening of the lateral bundle levator muscle of the upper lip and the ala of the nose, containing them with mononylon sutures, decreasing the gummy smile. It was noted that after surgery, the high smile line was corrected without compromising the labial harmony. The patient expressed high satisfaction with the treatment. The diagnosis and surgical technique proposed in the present study may be a therapeutic option for lip repositioning and smile harmony.

Influence of different surface treatments of fiberglass posts on the bond strength to dentin

Aim: To assess the influence of different fiberglass post surface treatments on the bond strength (BS) to root dentin. Methods: Thirty bovine root canals were endodontically treated and filled with gutta-percha and AH Plus sealer. At 24 h after the endodontic filling, the post spaces were prepared with Gates-Glidden drills and #3 drills of the DC White Post system, maintaining a 4 mm apical seal. The roots were randomly divided into three groups: S (fiberglass posts treated with silane), SA (fiberglass posts treated with silane and a hydrophobic adhesive system) and SHA (fiberglass posts treated with silane, followed by drying with hot air). The posts were cemented with a selfadhesive cement (RelyX U200). The specimens were stored in distilled water at 37 °C for 24 h and subjected to the push-out test (0.5 mm/min). Data were statistically analyzed using one-way ANOVA and Tukey's test (α=0.05) Results: SA and SHA groups showed the highest BS mean values (11.29 and 10.85 MPa, respectively), while the S group presented the lowest BS mean value (7.21 MPa). S group was significantly different from SA and SAH groups. Conclusions: The surface treatment of fiberglass posts influenced BS values (Au)