Avaliação da microinfiltração apical em dentes obturados com quatro diferentes cimentos endodônticos

OBJETIVOS: comparar a capacidade de selamento apical de quatro cimentos endodônticos. MÉTODOS: quarenta caninos superiores humanos extraídos foram instrumentados 1 mm aquém do ápice anatômico e distribuídos aleatoriamente em quatro grupos (n=10), de acordo com o cimento endodôntico utilizado para a obturação: Endofill, AH Plus, EndoREZ e Epiphany. Os canais radiculares foram obturados pela técnica da condensação lateral com os cimentos e com cones de guta-percha, exceto o grupo do Epiphany, no qual os cones de resina (Resilon) foram utilizados. Os dentes foram imersos em nanquim por sete dias e submetidos ao processo de diafanização e, então, clarificados empregando-se o salicilato de metila. A extensão de penetração via apical do corante foi medida por meio de um microscópio de mensuração em todas as faces do terço apical. RESULTADOS: AH Plus (0,02 mm ± 0,07), Epiphany (0,00 mm ± 0,00) e EndoREZ (0,32 mm ± 0,62) não diferiram estatisticamente entre si (p>;0,01). EndoFill apresentou a maior média de penetração do corante (0,83 mm ± 0,73) e diferiu estatisticamente dos demais (pOBJECTIVES: to compare the apical sealing ability of four root canal sealers. MATERIAL AND METHODS: forty extracted human maxillary canines were instrumented 1 mm short of the anatomical apex and randomly assigned to four groups (n=10), according to the root canal sealer used for obturation: Endofill, AH Plus, EndoREZ and Epiphany. Root canals were obturated with gutta-percha points, except for the Epiphany group, in which resin points (Resilon) were used. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal. RESULTS: AH Plus (0.02 mm ± 0.07), Epiphany (0.00 mm ± 0.00) and EndoREZ (0.32 mm ± 0.62) did not differ statistically to each other (p>;0.01). EndoFill presented the highest dye penetration mean (0.83 mm ± 0.73) and was statistically different from the other sealers (

The application of rapid prototyping in facial surgeries: a series of case studies

Aim: the aim of this paper is to report on the applicability of biomodels obtained from computerized tomography (CT) images throughthe technique of stereolithography (SLA) and three-dimensional printing (3DP), in the clinical case reports of patients who underwentsurgeries involving dentoskeletal deformity, oral pathology and oral and maxillofacial trauma. Methodology: clinical case 01 dealswith fractures in the orbital and zygomatic arch region that required reconstruction and correction of diplopia, by means of CTimages, using the technique of three-dimensional printing through SLA, generating a mirrored biomodel for surgical planning andthe making of customized prosthesis. In clinical case 02, by means of CT images, a biomodel utilizing the 3DP technique showed thetotal area invaded by invasive ameloblastoma, making it possible to plan the osteotomy with maximum preservation of the adjacenttissue and prior modeling of the plate. In clinical case 03, rapid prototyping technology (RP) was used to make customized prosthesisfor temporomandibular joint, with the goal of correcting a serious idiopathic pathology provoking the resorption of the right and leftcondyles. Discussion: complex cases require the team to have recourse to technology for the implementation of the procedures, inorder to offer excellent quality treatment to the patient, in addition to facilitating surgical planning and permitting the constructionof customized prostheses. Conclusion: the rapid prototyping for the acquisition of biomodels is an important auxiliary tool for thesurgical team

Evaluation of apical microleakage of teeth sealed with four different root canal sealers

OBJECTIVES: to compare the apical sealing ability of four root canal sealers. MATERIAL AND METHODS: forty extracted human maxillary canines were instrumented 1 mm short of the anatomical apex and randomly assigned to four groups (n=10), according to the root canal sealer used for obturation: Endofill, AH Plus, EndoREZ and Epiphany. Root canals were obturated with gutta-percha points, except for the Epiphany group, in which resin points (Resilon) were used. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal. RESULTS: AH Plus (0.02 mm &plusmn; 0.07), Epiphany (0.00 mm &plusmn; 0.00) and EndoREZ (0.32 mm &plusmn; 0.62) did not differ statistically to each other (p>0.01). EndoFill presented the highest dye penetration mean (0.83 mm &plusmn; 0.73) and was statistically different from the other sealers (p<0.01). CONCLUSION: the resin-based root canal sealers presented lesser apical microleakage than the zinc oxide and eugenol based sealer. No statistical differences were observed among resin based sealers