RESUMEN
This study examined the effect of three sealers and four irrigants on retention of Dentatus preformed posts luted with Panavia 21 resin cement. Gutta-percha with one of the following sealers--EWT, AH26, Nogenol, or no sealer (control)--was used to fill the root canals of 160 autoclaved incisor and premolar tooth roots. After 72 hr 8 mm post spaces were created with Dentatus Probos Pathfinders and Dentatus reamers. After irrigating the post spaces with saline, 5.25% NaOCl, 50% citric acid followed by NaOCl, or 40% H3PO4, followed by NaOCl, Panavia 21 TC cement was introduced into the canal on the Dentatus #4 stainless steel post's threads. An up-and-down and counterclockwise motion and then a forward twist seated the posts without engaging dentin. Mesiodistal and faciolingual radiographs visualized the chambers. After 72 hr posts were removed axially with an Instron at 5 mm/min. Surprisingly, using Nogenol sealer reduced post retention whereas EWT and AH26 increased retention compared with no sealer. Post retention improved after acid etchants, especially for AH26.
Asunto(s)
Cementación , Retención de Dentadura , Resinas Epoxi , Técnica de Perno Muñón , Cementos de Resina/química , Materiales de Obturación del Conducto Radicular/química , Irrigantes del Conducto Radicular/química , Grabado Ácido Dental , Análisis de Varianza , Diente Premolar , Bismuto/química , Ácido Cítrico/química , Análisis del Estrés Dental , Desinfectantes/química , Combinación de Medicamentos , Eugenol/química , Ácidos Grasos/química , Gutapercha/química , Humanos , Incisivo , Metenamina/química , Fosfatos/química , Ácidos Fosfóricos/química , Resinas de Plantas/química , Preparación del Conducto Radicular/instrumentación , Salicilatos/química , Plata/química , Hipoclorito de Sodio/química , Acero Inoxidable/química , Estrés Mecánico , Timol/química , Titanio/química , Óxido de Zinc/químicaAsunto(s)
Prótesis de Recubrimiento , Dentadura Parcial Removible , Abrasión de los Dientes/terapia , Bruxismo/complicaciones , Bruxismo/terapia , Pilares Dentales , Diseño de Dentadura , Dentadura Completa Superior/efectos adversos , Humanos , Masculino , Mandíbula , Persona de Mediana Edad , Abrasión de los Dientes/etiologíaRESUMEN
Endosseous implant placement is generally considered to be contra-indicated in patients undergoing chemotherapy for the treatment of cancer. A case is presented where a patient was diagnosed with cancer and began chemotherapy four weeks after endosseous implants were placed. The impact of chemotherapeutic agents on endosseous implant acceptance as well as upon oral tissue is examined.
Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Implantación Dental Endoósea , Oseointegración/efectos de los fármacos , Neoplasias Abdominales/tratamiento farmacológico , Anciano , Ciclofosfamida/administración & dosificación , Ciclofosfamida/efectos adversos , Atención Dental para Enfermos Crónicos , Implantes Dentales , Femenino , Humanos , Linfoma no Hodgkin/tratamiento farmacológico , Prednisona/administración & dosificación , Prednisona/efectos adversos , Factores de Tiempo , Vincristina/administración & dosificación , Vincristina/efectos adversos , Cicatrización de Heridas/efectos de los fármacosAsunto(s)
Aleaciones Dentales , Diseño de Dentadura , Prótesis de Recubrimiento , Dimensión Vertical , Anciano , Femenino , Humanos , Maxilar , Falla de Prótesis , Estrés Mecánico , Diente ArtificialRESUMEN
The purpose of this study was to assess the value of including repetition and reinforcement in a dental health education program for school children. Sixty-one pupils, 11 to 13 years of age, were divided into three groups according to room assignments. Group I (control) received no oral hygiene lectures or instructions until the conclusion of the experiment. Group 2 (nonreinforced) received one lecture and a toothbrushing lesson, but no repetition or reinforcement. Group 3 (reinforced) received the same program as Group 2 on the initial visit and also received two additional visits for repetition and reinforcement of the lectures and instructions, plus a final summary lecture. Six visits were conducted at intervals of 0, 1, 5, 3, 8, 20 and 52 weeks, following a double-blind experimental format. PHP scores were obtained on all subjects on each of the six visits. It was concluded that the repetition and reinforcement components of this dental health education program were of significant value in improving the oral hygiene performance of the school children over a period of 1 year. The findings provide evidence of the desirability of incorporating these concepts in plaque-control program.