A 20 year old female patient attended the dental hospital of the Regional Military Hospital, Guadalajara, Jalisco. The patient's complaint was tooth discoloration. Exploration revealed dyschromia in the upper central right incisor. Sensitivity tests elicited negative results, radiographic examination revealed lack of radio-lucid areas. Emitted diagnosis was pulp necrosis. Root canal treatment was conducted in one single visit. Intra-coronary whitening with thermo-catalytic technique was achieved at a later date. Clinical and radiographic follow-up were conducted 3, 6 and 12 months after procedure. At these sessions the following traits were observed: suitable clinical evolution, absence of symptomatology, radio-lucid area and suitable coloring of dental tissues.

Paciente femenino de 20 años de edad, quien acudió al Servicio de Odontología del Hospital Militar Regional de Guadalajara, Jalisco, por cambio de color en sus dientes. A la exploración, se observó discromía en el incisivo central superior derecho, las pruebas de sensibilidad negativas, radiográficamente ausencia de zona radio-lúcida, diagnosticándose necrosis pulpar, lo cual condujo al tratamiento de conductos en sesión única, para posteriormente realizar blanqueamiento intracoronario con técnica termocatalítica. Se llevó a cabo control clínico-radiográfico a uno, tres, seis y 12 meses, observándose en estos periodos, una adecuada evolución clínica, ausencia de sintomatología, zona radiolúcida y coloración adecuada de los tejidos dentales.

Avaliou-se o reparo de perfurações em dentes de cães, tratadas com ProRoot MTA, MTA Angelus e cimento Portland branco. As perfurações foram feitas na região de furca de premolares, superiores e inferiores, com broca STP 58 sob refrigeração com soro fisiólogico. Os animais foram mortos após 90 dias e os dentes foram preparados para análise microscópica pela coloração da hematoxilina e eosina. Os três materiais propiciaram o selamento da perfuração com tecido mineralizado e o teste de Kruskal-Wallis demostrou não haver diferença estatística entre eles.

Fourteen root perforations were performed for microscopic evaluation of the repair of interradicular tissue in dogs' teeth. These perforations were accomplished at low-speed with a STP 58 bur at the cervical third of the mesial root toward the furcation under irrigation with saline solution, followed by immediate sealing with ProRoot MTA, MTA-Angelus and white Portland cement. The dogs were killed after 90 days, revealing good results. The Kruskal-Wallis test did not demonstrate any statistically significant difference. It was concluded that the three materials showed good sealing in mineralized tissue, with complete closure, and they were free of inflammation in most teeth.