Abstract Objective The aim of this study was to evaluate the effect of photodynamic therapy (PDT) and non-thermal plasma (NTP) on adhesion and sealer penetration in root canals. Material and Methods Sixty single-rooted premolars were used. The teeth were prepared using a crown-down technique. NaOCl and EDTA were used for irrigation and smear layer removal, respectively. The root canals were divided into three groups: control, PDT, and NTP. After treatments, the roots were filled using gutta-percha and either AH Plus (AHP) or MTA Fillapex (MTAF) sealers. Samples were sectioned at 4, 8, and 12 mm from the apex (1-mm slices)and analyzed by the push-out bond strength test (adhesion) and confocal laser scanning microscopy (sealer penetration). Data were statistically evaluated using Kruskal-Wallis, Dunn’s, and Spearman’s tests. Results Regarding AHP, bond strength was similar in the NTP group and in the control group, but significantly lower in the PDT group. As to MTAF, both therapies showed lower values than the control group. In the confocal analysis of AHP, maximum and mean penetration, and penetrated area were statistically higher in the control group than in the PDT and NTP groups. Penetrated perimeter was similar among groups. Regarding MTAF, all parameters yielded better results in the NTP than in the control group. The PDT and control groups showed similar results except for penetrated area. Conclusion PDT and plasma therapy affected the adhesion and sealer penetration of root canals filled with AH Plus and MTA Fillapex and there is no positive correlation between adhesion and sealer penetration.

This study evaluated the ex vivoantimicrobial efficacy of the EndoVac system and the photodynamic therapy (PDT) associated with chemomechanical debridement (CMD) and intracanal medication on Candida albicans. Seventy-eight sterile premolars were contaminated withC. albicans (ATCC 21433) for 30 days. The teeth were randomly assigned into four groups: Control (CMD with conventional irrigation); Endovac (CMD with EndoVac system); PDT (CMD with conventional irrigation and PDT); and Endovac + PDT (CMD with EndoVac and PDT). After the therapies, intracanal dressing (calcium hydroxide) was applied to all teeth for seven days. Samples were obtained before (T1) and after the therapeutic procedures (T2), and after intracanal medication (T3), plated onto BHI agar and incubated (37°C, 48 h) to determine the colony-forming units (CFU)/mL. The overall mean level ofC. albicans at baseline was relatively high (1.85 x 106 ± 2.7 x 106 CFU mL-1). A significant reduction of C. albicans(p < 0.05) was observed over time (T1 to T2 and T1 to T3) in all groups. An additional significant reduction from T2 to T3 was observed only in the Endovac group (p < 0.05). No differences in mean reduction of C. albicans were observed among groups. However, the Endovac group presented the lowest mean counts of C. albicans at T3, whereas the PDT group had the highest counts of this microorganism (p < 0.05). The EndoVac system of irrigation/aspiration associated with CMD was the most effective therapeutic protocol for reducing intracanal levels of C. albicans. PDT showed a very limited efficacy against this species.

INTRODUÇÃO: Uma fratura coronorradicular envolve esmalte, dentina e cemento, podendo ou não haver comprometimento pulpar. Vários tratamentos são propostos na literatura, desde a colagem do fragmento dental até a extrusão cirúrgica do fragmento remanescente. O presente trabalho descreve um caso de fratura coronorradicular com envolvimento pulpar e a abordagem multidisciplinar dada ao caso. DESCRIÇÃO DO CASO CLÍNICO: Paciente procurou tratamento odontológico por causa de um "dente quebrado". O tratamento realizado consistiu em um retalho mucoperiosteal para remoção dos fragmentos dentais, tratamento endodôntico, restauração provisória, extrusão ortodôntica, uma nova restauração e a proservação do caso. CONCLUSÃO: Em pacientes jovens, na região anterior, a extrusão ortodôntica acompanhada do tratamento restaurador é uma opção de tratamento conservador e estético.

INTRODUCTION: A crown-root fracture involves enamel, dentin and cementum. There may or may not be pulp involvement. Several treatments are proposed in the literature, going from a simple bond of dental fragments to surgical extrusion of the dental remaining fragments. The article describes a case of crown-root fracture with pulp involvement, and the multidisciplinary approach applied to the case. CASE REPORT: Patient required dental treatment due to a "broken tooth". The treatment consisted in a mucoperiosteal flap to remove dental fragments, endodontic treatment, temporary restoration, orthodontic extrusion, a new restoration, and the follow-up of the case. CONCLUSION: While treating the anterior teeth of young patients, the orthodontic extrusion accompanied by restorative treatment is the most conservative and aesthetic option of treatment.