ABSTRACT
La presente comunicación tiene como objetivo informar sobre la cantidad de material que se pierde junto con las puntas dispensadoras descartables durante el uso de materiales endodónticos contenidos en jeringas y comprobar si esa cantidad es significativa en comparación con el contenido total original (15 g). Se procedió a pesar en una balanza de precisión 12 puntas dispensadoras descartables vacías, pertenecientes a dos materiales de uso endodóntico: 2Seal EasyMix (VDW) y Activa BioActive-Base/Liner (PulpDent Corp.). La sumatoria del peso (masa) en las 12 puntas pertenecientes a cada uno de los materiales ensayados fue considerada como peso total de las puntas vacías. Posteriormente, las puntas se llenaron completamente con los materiales, se almacenaron durante 48 horas para permitir el fraguado y finalmente se las pesó nuevamente. La diferencia entre el peso de las 12 puntas vacías y llenas fue considerada como la cantidad de material remanente que se descarta con ellas. La diferencia entre los totales de masa contenida en las puntas llenas de cada material y el contenido original de las jeringas representó la proporción de material que se descarta sin haber sido utilizado. Cuando el porcentaje de material descartado fue menor o igual al 20%, el resultado se consideró aceptable. Se observó que la proporción de ambos materiales fue mayor al 20% (2Seal EasyMix=44,36%; Activa BioActive-Base/Liner=36,87%). Se concluyó que el empleo de materiales endodónticos contenidos en jeringas dispensadoras produce la pérdida de una importante proporción de material durante los procedimientos operatorios (AU)
In order to inform about the amount of material that is lost along with the disposable dispensing tips during the use of endodontic materials contained in deliver syringes and check if that amount is significant compared to the total original content (15 g) of them. 12 empty disposable dispensing tips belonging to two endodontic materials: 2Seal EasyMix (VDW) and ActivaBioactive Base/liner (PulpDent Corp.), were weighed on a precision scale. The sum of the weight (mass) of each of the 12 tips belonging to each of the materials tested was considered as the total weight of the empty tips. Subsequently, the tips were completely filled with the materials, stored for 48 hours to allow them to set and finally weighed again. The difference between the weight of the 12 empty and full tips was considered as the amount of material remaining within them that is discarded. The difference between the total mass contained in 12 filled tips of each material and the original syringe content represented the proportion of material discarded without being used. It was considered that if the % of discarded material was ≤20% this would be considered acceptable. It was observed that the proportion of both materials was >20% (2Seal EasyMix = 44.36%; ActivaBioactive Base/liner = 36.87%). The use of endodontic materials contained in dispensing syringes causes the loss of a significant proportion of material during the operative procedures (AU)
Subject(s)
Root Canal Filling Materials , Syringes , Data Interpretation, Statistical , Disposable EquipmentABSTRACT
Introducción: durante el proceso de identificación forense de cadáveres y restos humanos quemados, carbonizados o incinerados, el análisis de los materiales empleados en los diferentes tratamientos odontológicos se constituye en un marcador fehaciente para lograr una identificación positiva. El objetivo de este trabajo fue describir los cambios radiográficos de postes de titanio y de fibra de vidrio cementados, en premolares humanos sometidos a altas temperaturas con fines forenses. Métodos: estudio pseudo-experimental in vitro que observó los cambios radiográficos de los tejidos dentales (esmalte, dentina y cemento), de los materiales de uso endodóncico gutapercha (Wave One® de Dentsply Maillefer®), material de obturación (Top Seal® de Dentsply Maillefer®), material de cementación de los postes (Relyx TM ARC de 3M ESPE®) y de los postes de titanio (Tenax® Endodontic Post System de Coltene®) y fibra de vidrio (Tenax® Fiber Trans de Coltene®) en 30 dientes humanos, sometidos a cinco rangos de temperatura 200, 400, 600, 800 y 1000ºC. Resultados: los tejidos y los materiales dentales estudiados presentan gran resistencia a las altas temperaturas, sin variar considerablemente su macro-estructura (fisuras, grietas, fracturas y fragmentación), de tal manera que los cambios físicos pueden identificarse a través de radiografía convencional, y asociarse a cada rango de temperatura específico. Conclusiones: los postes cementados en premolares humanos presentan gran resistencia a la acción de altas temperaturas, razón por la cual pueden ser visualizados a través de radiografía convencional, contribuyendo con el proceso de identificación y documentación de la necropsia médico-legal de un cadáver o restos humanos que hayan resultado quemados, incinerados o carbonizados
IIntroduction: during the process of forensic identification of corpses and burnt, carbonized, or incinerated human remains, the analysis of materials used in dental treatments is a reliable marker for accurate identification. The objective of this study was to describe the radiographic changes of titanium and fiberglass posts cemented in human premolars subjected to high temperatures for forensic purposes. Methods: this was a pseudo-experimental in vitro study to observe the radiographic changes of dental tissues (enamel, dentin, and cement) and the following endodontic materials: gutta-percha (Wave One® by Dentsply Maillefer®), obturation material (Top Seal® by Dentsply Maillefer®), post cementation material (Relyx TM ARC by 3M ESPE®), titanium posts (Tenax® Endodontic Post System by Coltene®), and fiberglass posts (Tenax® Fiber Trans by Coltene®) in 30 human teeth subject to five temperature ranges: 200, 400, 600, 800, and 1000° C. Results: the studied dental tissues and materials are highly resistant to high temperatures without significantly changing their macrostructure (fissures, cracks, fractures, and fragmentation), in such a way that the physical changes can be identified through conventional radiography and associated with each specific temperature range. Conclusions: posts cemented in human premolars have great resistance to the action of high temperatures, so they can be observed through conventional radiography thus contributing to the process of identification and documentation of the medico-legal autopsy of a corpse or human remains that have been burned, incinerated, or carbonized
Subject(s)
Forensic Dentistry , Victims IdentificationABSTRACT
O objetivo deste trabalho foi avaliar ao efeito citotóxico doHidróxido de Cálcio, Paramonoclorofenol Canforado, Otosporin eFormocresol diluído em células-tronco da polpa de dente permanentehumano (DPSC). As DPSC foram semeadas em placa decultura na concentração de 1,5X104 células/poço. Foram feitasdiluições das drogas em 1:9, 1:27 e 1:81 e deixadas em contatocom as células por 2 horas, sendo que o grupo controle foi mantidoem DMEM completo. As células foram lavadas com soluçãosalina duas vezes. Foram realizadas avaliações do metabolismo(MTT). Concluiu-se que o Hidróxido de Cálcio e o Otosporinforam as drogas menos tóxicas para as DPSC, enquanto que oParamonofenol Canforado e o Formocresol foram letais em todas asconcentrações.
The aim of this paper was analyze the cytotoxicity effect ofCalcium Hydroxide, Paramonoclorofenol Canforado, Otosporinand Formocresol deluded in dental pulp stem cells (DPSC).Material and Methods: DPSC were grown in 96 wells cultureplate in the concentration of 1.5 X104 cells per well. Dilutionsof drugs were as followed: 1:9, 1:27 and 1:81, and control withDPSC in DMEM. The cells were cultured for an additional 2hours. The cells were washed with bufferin saline solution for2 times and MTT test was performed. Results: The Ca(OH)2and Otosporin were the drugs less toxic to the DPSC, while theParamonophenol Canforated and formocresol were lethal in allconcentrations. Conclusions: all drugs tested were toxic to theDPSC.
ABSTRACT
OBJECTIVE: The aim of this study was to compare two methodologies used in the evaluation of tissue response to root-end filling materials in rats. MATERIAL AND METHODS: Forty rats were divided into 4 groups: in Groups I and II (control groups), empty polyethylene tubes were implanted in the extraction site and in the subcutaneous tissue, respectively; in Groups III and IV, polyethylene tubes filled with ProRoot MTA were implanted in the extraction site and in the subcutaneous tissue, respectively. The animals were killed 7 and 30 days after tube implantation, and the hemi-maxillas and the capsular subcutaneous tissue, both with the tubes, were removed. Specimens were processed and evaluated histomorphologicaly under light microscopy. The scores obtained were analyzed statistically by the Kruskal-Wallis test (p<0.05). RESULTS: There were no statistically significant differences between the implantation methods (p=0.78033, p=0.72039). It was observed that the 30-day groups presented a more mature healing process due to smaller number of inflammatory cells. CONCLUSIONS: The present study showed no differences in tissue responses as far as the implantation site and the studied period were concerned. Alveolar socket implantation methodology represents an interesting method in the study of the biological properties of root-end filling endodontic materials due to the opportunity to evaluate bone tissue response.
Subject(s)
Animals , Rats , Alveolar Process/drug effects , Biocompatible Materials/pharmacology , Root Canal Filling Materials/pharmacology , Subcutaneous Tissue/drug effects , Tooth Socket/drug effects , Aluminum Compounds/pharmacology , Alveolar Process/pathology , Calcium Compounds/pharmacology , Connective Tissue/pathology , Drug Combinations , Granulation Tissue/pathology , Gutta-Percha/pharmacology , Inflammation , Materials Testing , Neovascularization, Physiologic/physiology , Oxides/pharmacology , Polyethylene/pharmacology , Rats, Wistar , Retrograde Obturation , Silicates/pharmacology , Subcutaneous Tissue/pathology , Time Factors , Tooth Socket/pathology , Wound Healing/drug effectsABSTRACT
A cirurgia paraendodôntica é o tratamento de lesões perirradiculares através de um conjunto de procedimentos por meio cirúrgico, cujo objetivo entre outros visa resolver complicações decorrentes do tratamento endodôntico mal sucedido. A obturação retrógrada, uma das modalidades da cirurgia paraendodôntica, cnsiste na remoção do ápice da raiz, seguida de um preparo de uma cavidade e obturação desse espaço com material adequado. Vários materiais tem sido propostos, com o objetivo de promover o selamento do canal radicular por via retrógrada, dentre os quais podemos citar o Super EBA, o amálgama de prata e o MTA. Este trabalho se propõe através de uma revisão de literatura determinar entre os materiais retrobturadores, aquele que apresenta propriedades aceitáveis para a sua utilização na prática cirúrgica.
Endodontic surgery is the treatment of periradicular lesions by any surgical procedure to solve complications of unsucccessful the endodontic treatment. Retrograde filling, one of the surgery modalities, consists in removing the apex of the root, followed by the preparation of the cavity and its filling with appropriate materials such as Super-EBA, amalgam and MTA. The purpose of this literature review is determinate among the root-end filling materials witch one presents acceptable properties for it uses in surgical practice.