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1.
Article in Spanish | LILACS | ID: lil-582931

ABSTRACT

Se realizó un estudio in vitro que tuvo por objetivo medir el grado de adaptación del sistema espiga muñón, debido a que es uno de los factores fundamentales para lograr un buen anclaje de estos artificios, medido a nivel del núcleo de éste con respecto a los planos radiculares y de la espiga a las paredes del conducto, cuando es conformado con fresas Peeso y cuando es conformado usando fresas Peeso terminando con fresas del sistema Mooser. Seleccionamos 40 dientes que se dividieron al azar en dos grupos de 20, denominados P y M, respectivamente. Se confeccionó en cada muestra, previamente tratado su conducto mediante método indirecto, un perno muñón colado que fue probado en la preparación donde se midió el ajuste del muñón propiamente tal, después de logrado el asentamiento adecuado mediante desgastes en las interferencias de la espiga fueron cementados, posteriormente se realizaron dos cortes transversales a todo el espesor de la raíz a diferentes alturas, donde se midió la interfase entre la espiga y las paredes del conducto (adaptación). Los resultados fueron analizados utilizando los test de Mann-Whitney, Tukey y test T pareado, con software Systat versión 11, encontrándose que la mejor adaptación se observa en las muestras del grupo M en los dos sitios observados, comparadas con las del grupo P Estas diferencias son estadísticamente significativas.


We carried out a research aimed to determine the adaptation of the system called cast post and core, because it's one of the main factors to achieve a good adaptation of these devices measured from the core of this device to radicular plan, and from the post to the canal protesic's surface, when this one was prepared with Peeso's burs, and when was also prepared starting with Peeso's burs but finishing with Mooser system's burs. For that objective, we selected 40 teeth that were divided randomly into two groups of 20, called P and M respectively. A cast post and core was made in each sample through indirect method, previously treated the protesic canal. The cast post and core was tested in the preparation where the fit of the core was measured. Once achieved the proper settlement through the wearing out of the post's interferences and once the cast post and core was cemented, we made two cross cuttings to the thickness of the root at two differents levels, where the interface between the post and canal protesic's surface was measured (adaptation). The results were analyzed using the Mann-Whithny test, Tukey and paired T test, with Systast software version 11, having found that the best adaptation was observed in the samples of group M at the two points analyzed, compared to group P. These differences are statistically significant.


Subject(s)
Humans , Dental Prosthesis Design , Post and Core Technique , Root Canal Preparation/methods , Materials Testing
2.
Article in Spanish | LILACS | ID: lil-682905

ABSTRACT

La reconstrucción de los dientes tratados endodónticamente juega un papel importante en el pronóstico, ya que el 60% de los fracasos endodónticos se relacionan con la rehabilitación. Diversos sistemas y materiales se han utilizado en la reconstrucción de los dientes, alternando el diseño, material del perno, agente cementante y el tipo de muñón utilizado, evidenciando resultados contradictorios. Evaluar la resistencia a la tensión (RT) entre tres diferentes sistemas de pernos intrarradiculares. Se incluyeron 45 premolares monorradiculares, los cuales fueron instrumentados y preparados para ser reconstruidos con diversos sistemas de pernos. Estos fueron divididos en tres grupos: 1.-Sistema Perno-Muñón Colado (PMC), 2.-Sistema Para-Post Acero (PPA) y 3.-Sistema Para-Post Fiber-Lux (PPFL), cementados uniformemente con un cemento resinoso y sometido a RT en una máquina Instrom. La máxima RT fue para el sistema PMC (11.11 Mp), seguido por PPFL (3.42 Mp) y PPA con (3.14 Mp). La prueba de ANOVA complementada con el Post-Hoc DSH de Tukey reveló diferencias significativas entre PMC vs PPA y PPFL (p<0.05), entre PPA vs PPFL no hubo diferencias significativas. Ningún sistema prefabricado se desalojó a la prueba de tensión y los muñones se fracturaron. El sistema de PMC registró mayor RT que los sistemas PPA y PPFL (p<0.05) entre los prefabricados no existieron diferencias significativas


The reconstruction of teeth endodontically treated represents an important role, since the 60% of the endodontic failures relate to the rehabilitation. Diverse technical and material they have been utilized in the reconstruction of the posts, alternating the design, material, luting agent and the type of core utilized, showing contradictory results. Evaluating the tensional resistance (TR) of three post-endodontical reconstruction systems.Forty-five human premolars were used for this study, which were instrumented and prepared for receiving a post. They were divided into three groups: l. - casted post and core system (CPC), 2. - Steel Para-Post system (SPP) and 3. - Para-Post Fiber-Lux system (PPFL), which they were cemented with resinous cement and submitted to TR in Instrom machine. The maximum TR was for CPC (11.11 Mp), followed by PPFL (3.42 Mp) and SPP with (3.14 Mp). The ANOVA test supplemented with Post-Hoc HSD de Tukey´s revealed statistically differences significantly between CPC vs SPP and PPFL (p<0.05), among SPP vs PPFL do not there was statistically differences significantly. The prefabricated post, not there was dislocated and the cores were fractured. The CPC registered the higher TR that the prefabricated post (p<0.05) and among the prefabricated post did not exist differences significantly


Subject(s)
Humans , Resin Cements/therapeutic use , Endodontics/trends , In Vitro Techniques , Post and Core Technique , Dentistry
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