Assuntos
Síndrome de Dente Quebrado/prevenção & controle , Restauração Dentária Permanente/métodos , Cimentação , Síndrome de Dente Quebrado/diagnóstico , Restauração Dentária Permanente/instrumentação , Elastômeros , Desenho de Equipamento , Humanos , Braquetes Ortodônticos , Prognóstico , Pulpite/etiologia , Pulpite/terapia , Tratamento do Canal RadicularRESUMO
Teflon tubes containing freshly mixed, polymerized Hydron root canal filling material, fully set AH26 or Teflon were implanted into the mandible of guinea pigs and assessed histologically at 2 days, 1, 2, 4, 12 and 26 weeks. None of the materials tested elicited signs of overt or significant tissue damage, and polymerized Hydron was assessed to be as biocompatible as fully set AH26 and Teflon. Bone formed in very close apposition to the polymerized Hydron, whereas a soft tissue capsule separated the regenerated bone from implants of AH26 and Teflon.
Assuntos
Regeneração Óssea/efeitos dos fármacos , Resinas Epóxi , Poli-Hidroxietil Metacrilato/análogos & derivados , Materiais Restauradores do Canal Radicular/toxicidade , Animais , Materiais Biocompatíveis , Bismuto/toxicidade , Osso e Ossos/efeitos dos fármacos , Combinação de Medicamentos , Cobaias , Hidrogéis , Masculino , Teste de Materiais , Metenamina/toxicidade , Poli-Hidroxietil Metacrilato/toxicidade , Politetrafluoretileno/toxicidade , Próteses e Implantes , Prata/toxicidade , Titânio/toxicidade , Cicatrização/efeitos dos fármacosRESUMO
Freshly mixed polymerized Hydron root canal filling material, fully set AH26 and Teflon were implanted in the quadriceps muscle of guinea pigs and assessed histologically at 2 days, 1, 2, 3, 12 and 26 weeks after implantation. All materials were characterized by peri-implant fibrous connective tissue capsule formation. Von Kossa-positive calcific material was observed at the implant-tissue interface of Hydron implants. The amount of apparently calcified material increased with time. Inflammation was not a prominent tissue response for any of the test materials, nor was a foreign body giant cell response.
Assuntos
Resinas Epóxi , Músculos/efeitos dos fármacos , Poli-Hidroxietil Metacrilato/análogos & derivados , Materiais Restauradores do Canal Radicular/toxicidade , Animais , Materiais Biocompatíveis , Bismuto/toxicidade , Combinação de Medicamentos , Reação a Corpo Estranho , Cobaias , Hidrogéis , Inflamação/induzido quimicamente , Ativação de Macrófagos , Masculino , Teste de Materiais , Metenamina/toxicidade , Poli-Hidroxietil Metacrilato/toxicidade , Politetrafluoretileno/toxicidade , Próteses e Implantes , Prata/toxicidade , Titânio/toxicidadeRESUMO
The root canals of 30 extracted human teeth with single canals were prepared biomechanically with hand instruments using a flaring technique. Three different irrigation regimes were used, with and without ultrasonic activation of a root canal file. The six irrigation sequences used in this study were as follows: Savlon, Savlon with ultrasound, EDTAC/NaOCl/EDTAC, EDTAC/NaOCl/EDTAC with ultrasound, NaOCl/EDTAC/NaOCl, and NaOCl/EDTAC/NaOCl with ultrasound. Scanning electron microscopic (SEM) examination of the prepared root canal walls showed a complete smear layer when Savlon was used. Ultrasound reduced the amount of smear with Savlon, but did not do so significantly with the other irrigation regimes. The most effective irrigation regime for removing smear layer and other debris was EDTAC/NaOCl/EDTAC. In all groups there was a significant decrease in cleaning efficiency as the apical end of the canal was approached.
