Instrumento cortador e removedor de material edodôntico: desenvolvimento e aplicabilidade
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Data
2010-07-08
Autores
Gomes, Cristiane Andrade [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A proposta do presente estudo foi a de desenvolver e viabilizar a elaboração de um instrumento endodôntico para facilitar e minimizar os riscos causados pela técnica utilizada pelos dentistas durante a finalização do tratamento do canal radicular (endodôntico). Analisando o procedimento utilizado atualmente para o corte e a remoção do excesso de material endodôntico, os chamados cones de guta percha, julga-se apropriado o desenvolvimento de um instrumento inovador para executar esta tarefa. Esta necessidade se deve ao fato de não existir no mercado odontológico um instrumento específico para tal finalidade. Atualmente, os dentistas utilizam uma espátula metálica em aço inoxidável aquecida em chama para o corte do excesso do cone endodôntico, sendo que esta espátula (os chamados condensadores Paiva) atinge temperaturas elevadas, aproximadamente 230◦ C, podendo causar trauma na cavidade oral. O presente trabalho se propõe ainda a avaliar a efetividade das ponteiras metálicas do instrumento, quanto ao seu uso e ciclos de esterilização em autoclave. Os materiais utilizados para confecção das ponteiras e utilizados para os ensaios mecânicos serão: o aço inoxidável 304 L e o titânio Grau 2. Para que o excesso de guta percha seja removido do canal radicular será necessária a confecção de diferentes diâmetros de ponteiras em titânio ou aço inoxidável 304 L, que serão conectadas a extremidade do instrumento elétrico e posteriormente aquecidas. Ensaios mecânicos de fadiga axial foram realizados em 16 corpos de prova: 8 em titânio e 8 em aço inoxidável 304 L, segundo norma ASTM E8. A metade da amostra foi submetida a quinze ciclos de esterilização em autoclave. Pode-se observar que o aço inoxidável 304 L apresentou resistência à fadiga superior ao do Titânio Grau 2. Após os ensaios de fadiga, definiu-se que o material utilizado...
The aim of the present study was to develop the preparation of an endodontic instrument to facilitate and minimize the risks caused by the technique used by dentists during the root canal treatment completion (endodontic). Analyzing the current procedure for cutting and removal of excess endodontic material (gutta-percha), it is deemed appropriate the development of an innovative tool. The necessity is due to the fact that there is no specific instrument in dentistry for such purpose. Currently, dentists use a heated stainless steel spatula for cutting the excess part of the endodontic cone and this spatula reaches high temperatures (around 230 ◦ C) that may cause oral cavity trauma. Given the above, this work aims to develop an electric instrument for cutting and removing the excess of gutta-percha after root canal treatment thereby optimizing the technique and minimizing the risks to the patient. This study also evaluates the effectiveness of the instrument metal tip on its use and sterilization cycles by autoclaving. The materials used for the manufacturing of the metal tips and mechanical tests are: 304 L stainless steel and Grade 2 titanium. The manufacturing of different diameters metal tips either of titanium or stainless steel (which are attached to the end of the electrical apparatus and then heated.) is required for the removal of the excess of gutta-percha from the root canal. Axial fatigue mechanical tests were performed which verified the materials fatigue behavior specimens were manufactured for the axial fatigue tests, originating 16 specimens: 8 in titanium and 8 in 304 L stainless steel, according to ASTM E8. Half of the samples were subjected to 15 cycles of autoclave sterilization. It was observed that 304 L stainless steel showed fatigue resistance superior to that of Grade 2 Titanium. The results showed that even after the heat treatment... (Complete abstract click electronic access below)
The aim of the present study was to develop the preparation of an endodontic instrument to facilitate and minimize the risks caused by the technique used by dentists during the root canal treatment completion (endodontic). Analyzing the current procedure for cutting and removal of excess endodontic material (gutta-percha), it is deemed appropriate the development of an innovative tool. The necessity is due to the fact that there is no specific instrument in dentistry for such purpose. Currently, dentists use a heated stainless steel spatula for cutting the excess part of the endodontic cone and this spatula reaches high temperatures (around 230 ◦ C) that may cause oral cavity trauma. Given the above, this work aims to develop an electric instrument for cutting and removing the excess of gutta-percha after root canal treatment thereby optimizing the technique and minimizing the risks to the patient. This study also evaluates the effectiveness of the instrument metal tip on its use and sterilization cycles by autoclaving. The materials used for the manufacturing of the metal tips and mechanical tests are: 304 L stainless steel and Grade 2 titanium. The manufacturing of different diameters metal tips either of titanium or stainless steel (which are attached to the end of the electrical apparatus and then heated.) is required for the removal of the excess of gutta-percha from the root canal. Axial fatigue mechanical tests were performed which verified the materials fatigue behavior specimens were manufactured for the axial fatigue tests, originating 16 specimens: 8 in titanium and 8 in 304 L stainless steel, according to ASTM E8. Half of the samples were subjected to 15 cycles of autoclave sterilization. It was observed that 304 L stainless steel showed fatigue resistance superior to that of Grade 2 Titanium. The results showed that even after the heat treatment... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Aço inoxidavel, Fadiga, Titanio, Stainless steel, Fatigue, Titanium
Como citar
GOMES, Cristiane Andrade. Instrumento cortador e removedor de material edodôntico: desenvolvimento e aplicabilidade. 2010. 106 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Engenharia de Guaratinguetá, 2010.