ABSTRACT
Abstract The fit of the implant-abutment interface was assessed by the metallographic technique and by scanning electron microscopy (SEM), using solid abutment types at different torque levels. Forty Morse taper connections and forty solid abutments were used at different torque levels (repeated after 10 minutes) in the following groups (n = 10): 25 Ncm (group g1), 30 Ncm (group g2), 35 Ncm (group g3), and 40 Ncm (group g4). The samples were embedded in a metallographic resin, sectioned lengthwise, and polished. SEM images were used to measure the linear contacts and the fits between abutments and the internal walls of the implant. The overall mean gap and standard deviation were as follows: 9.0 ± 1.36 µm for group g1, 7.9 ± 2.81 µm for group g2, 2.0 ± 0.76 µm for group g3, and 0.3 ± 0.40 µm for group g4. A significant difference was observed in the average fit values between the groups (p < 0.05). The linear area of contact between the abutment and the implant increased as torque augmented. This study demonstrated that higher insertion torque values in a conical internal connection increase the fit (contact) of the implant-abutment interface.
Subject(s)
Dental Implants/standards , Dental Abutments/standards , Torque , Dental Implantation, Endosseous/methods , Dental Implant-Abutment Design/methods , Reference Standards , Bone Screws , Materials Testing , Microscopy, Electron, Scanning , Analysis of Variance , Weight-BearingABSTRACT
Objectives: The dual-arch impression technique is convenient in that it makes the required maxillary and mandibular impressions, as well as the inter-occlusal record in one procedure. The accuracy of inter-abutment distance in dies fabricated from dual-arch impression technique remains in question because there is little information available in the literature. Materials and Methods: This study was conducted to evaluate the accuracy of inter-abutment distance in dies obtained from full arch dual-arch trays with those obtained from full arch stock metal trays. Results and Conclusion: The metal dual-arch trays showed better accuracy followed by the plastic dual-arch and stock dentulous trays, respectively, though statistically insignificant. The pouring sequence did not have any effect on the inter-abutment distance statistically, though pouring the non-working side of the dual-arch impression first showed better accuracy.
Subject(s)
Alloys , Bicuspid , Dental Abutments/standards , Dental Articulators , Dental Impression Materials/chemistry , Dental Impression Technique/instrumentation , Dental Impression Technique/standards , Models, Dental/standards , Dental Occlusion, Centric , Denture Design/standards , Denture, Partial, Fixed , Equipment Design , Humans , Jaw Relation Record/instrumentation , Jaw Relation Record/methods , Molar , Plastics , Polyvinyls/chemistry , Siloxanes/chemistry , Surface PropertiesABSTRACT
Los tratamientos de sobredentaduras están tomando cada vez más auge debido a que la población tiene una mayor educación respecto a su salud oral, además de que los odontólogos están mejor capacitados para realizar este tipo de tratamiento. En este artículo se pretende ilustrar las diferentes opciones de aditamentos que se tienen para aumentar la retención y estabilidad de la dentadura y se presentan las características de los aditamentos Preci-ball son fáciles de conseguir, sus procedimientos clínicos y de laboratorio son sencillos y rápidos, son maquinados en aleación oro o paladio y limpiados fácilmente
Subject(s)
Humans , Female , Middle Aged , Dental Prosthesis Retention , Denture, Overlay/standards , Denture Precision Attachment/standards , Dental Abutments/standards , Dental PinsABSTRACT
Um dos problemas que ocorrem no emprego dos implantes está associado ao afrouxamento das conexöes, devido à falta de ajuste entre o sextavado do implante e do abutment. Uma das causas do desajuste tem sido a variaçäo dimensional e a näo ocorrência de intercambialidade das peças. Neste trabalho, fez-se a análise estatística das dimensöes de implantes Master Screw e comparou-se os resultados com dimensöes dos implantes Ster-Oss, Lifecore e Calcitek existentes na literatura. Os resultados mostraram que os implantes Master Screw possuem tolerância dimensionais equivalentes a dos implantes importados, o que permite boa ajustagem com os abutments e possibilidade de reduzir o afrouxamento dos sistemas
Subject(s)
Dental Abutments/standards , Dental Implants/standards , Dental Prosthesis Retention/instrumentation , Dental Prosthesis Retention/methods , Technology, Dental , Tensile StrengthABSTRACT
Se efectúa una valorización matemática de la utilización de implantes como pilares para la solución de los diferentes casos clínicos que se pueden presentar en implantología oseointegrada. Para solucionarlos se enuncian 1 regla y 2 norma que contemplan todas las alternativas en bocas parcialmente desdentadas. En edéntulos totales se dicta 1 regla. El uso de cantilevers en implantología está regido por 4 reglas
Subject(s)
Humans , Dental Abutments/standards , Dental Implantation, Endosseous/methods , Osseointegration/physiology , Alveolar Process , Alveolar Process/anatomy & histology , Bone Density , Densitometry , Jaw, Edentulous , Jaw, Edentulous/rehabilitation , Dental Prosthesis, Implant-Supported/standards , Radiography, Panoramic/methods , Titanium/chemistry , Tomography, X-Ray Computed/methodsABSTRACT
Se realiza un estudio comparativo entre los pilares cónicos paralelizables de base externa, pilares angulados prefabricados y pilares angulados colados, obtenidos a partir del material calcinable. Los pilares cónicos paralelizables, de base externa se caracterizan por su diseño logrado por método directo, directo-indirecto o indirecto, consiguiendo una personalización en su emergencia y angulación óptima del sector a reponer con indicaciones precisas para el sector superior. Consigue una perfecta adaptación de 2 superficies maquinadas enfrentadas o en contacto, evitando corrosión galvánica y efectos similares en los tejidos blandos. Su construcción y conformación de una sola pieza evita problemas de fatiga e imperfección del metal por colado