Caracterización metalúrgica y resistencia a la torsión de las fresas ULTRADRILL DENTOOLS® Y STECO®

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dc.contributor.advisorBastidas Neira, Harrizon Alexander
dc.contributor.authorVásquez Correa, Geraldine
dc.contributor.authorChávez Andrade, Diana Yulay
dc.contributor.authorAlarcón Pinilla, Anyela Lizeth
dc.date.accessioned2025-06-19T13:42:29Z
dc.date.available2025-06-19T13:42:29Z
dc.date.issued2025-06-18
dc.descriptionEl tratamiento endodóntico en dientes con conductos obliterados representa un alto grado de complejidad clínica, siendo las fresas especializadas un recurso fundamental para el acceso guiado. Sin embargo, la literatura sobre su composición metalúrgica y desempeño mecánico es limitada. Objetivo: Evaluar y comparar las características metalúrgicas, fisicoquímicas y la resistencia a la torsión de dos fresas de acero inoxidable utilizadas en endodoncia guiada —Ultradrill Dentools® y Steco®— con el fin de determinar sus posibles implicaciones clínicas en el tratamiento de conductos esclerosados. Método: Se analizaron cuatro fresas (dos por cada marca) a través de un protocolo estandarizado de desinfección y esterilización. Se realizaron análisis mediante microscopía electrónica de barrido (SEM), espectroscopía de dispersión de energía de rayos X (EDS), análisis de carbono y azufre por cromatografía, pruebas mecánicas de torsión con torquímetro calibrado y análisis fractográfico post-torsión. Adicionalmente, se evaluó la morfología del vástago y del borde activo mediante SEM y estereomicroscopía. Resultados: Las fresas Dentools® mostraron mayor resistencia a la torsión, con valores que superaron entre 1.2 y 6.8 veces los registrados por las fresas Steco®. El análisis composicional reveló que Dentools® contiene níquel y titanio, y menor contenido de azufre y carbono, correspondiente a un acero austenítico; mientras que Steco® presenta un acero martensítico con mayor dureza, pero menor tenacidad. Todas las muestras exhibieron fracturas de tipo dúctil. A nivel macroscópico, ambas fresas mostraron forma activa en "S" itálica, con variaciones dimensionales respecto a los valores reportados por los fabricantes. Dentools® presentó mayor homogeneidad superficial y menor presencia de líneas de fisura en el vástago. Conclusiones: Existen diferencias significativas entre ambos sistemas evaluados, tanto en su composición química como en su comportamiento mecánico. Las fresas Ultradrill Dentools®, al estar fabricadas con acero austenítico, ofrecen mayor resistencia a la torsión y mayor ductilidad, características deseables en procedimientos clínicos de alta exigencia. La menor proporción de azufre y carbono sugiere una mayor estabilidad frente a la corrosión. Se recomienda continuar con estudios que evalúen el desgaste y la durabilidad clínica de estos instrumentos.
dc.description.abstractEndodontic treatment in teeth with obliterated root canals represents a high degree of clinical complexity, with specialized burs being a fundamental resource for guided access. However, the literature on their metallurgical composition and mechanical performance is limited. Objective: To evaluate and compare the metallurgical, physicochemical characteristics and torsional strength of two stainless steel burs used in guided endodontics—Ultradrill Dentools® and Steco®—in order to determine their potential clinical implications in the treatment of sclerotic root canals. Method: Four burs (two from each brand) were analyzed using a standardized disinfection and sterilization protocol. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), carbon and sulfur chromatographic analysis, mechanical torsion testing with a calibrated torque wrench, and post-torsion fractographic analysis were performed. Additionally, the morphology of the shank and active edge was evaluated using SEM and stereomicroscopy. Results: Dentools® burs showed greater torsional strength, with values between 1.2 and 6.8 times higher than those recorded by Steco® burs. Compositional analysis revealed that Dentools® contains nickel and titanium, and lower sulfur and carbon contents, corresponding to an austenitic steel; while Steco® presents a maraging steel with greater hardness but lower toughness. All samples exhibited ductile fractures. At the macroscopic level, both burs showed an italic "S" active shape, with dimensional variations compared to the values reported by the manufacturers. Dentools® presented greater surface homogeneity and fewer crack lines in the shank. Conclusions: There are significant differences between the two systems evaluated, both in their chemical composition and mechanical behavior. Ultradrill Dentools® burs, made of austenitic steel, offer greater torsional strength and ductility, desirable characteristics in highly demanding clinical procedures. The lower sulfur-to-carbon ratio suggests greater corrosion resistance. Further studies evaluating the wear and clinical durability of these instruments are recommended.
dc.description.degreelevelEspecializaciónspa
dc.description.degreenameEspecialista en Endodonciaspa
dc.description.domainhttps://www.ustabuca.edu.co/
dc.format.mimetypeapplication/pdf
dc.identifier.citationVasquez Correa, G. Chavez Andrare, D.Y. y Alarcon Pinilla, A.L. (2025) Caracterización metalúrgica y resistencia a la torsión de las fresas ULTRADRILL DENTOOLS® Y STECO®. (Tesis de posgrado Especializacion endodoncia). Universidad Santo Tomas, Bucaramanga, Colombia.
dc.identifier.instnameinstname:Universidad Santo Tomásspa
dc.identifier.reponamereponame:Repositorio Institucional Universidad Santo Tomásspa
dc.identifier.repourlrepourl:https://repository.usta.edu.cospa
dc.identifier.urihttp://hdl.handle.net/11634/67981
dc.language.isospa
dc.publisherUniversidad Santo Tomásspa
dc.publisher.branchCRAI-USTA Bucaramanga
dc.publisher.facultyFacultad de Odontologíaspa
dc.publisher.programEspecialización Endodonciaspa
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dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Colombiaen
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.rights.coarhttp://purl.org/coar/access_right/c_14cb
dc.rights.localAbierto (Texto Completo)spa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/co/
dc.subject.keywordSclerosed canal, Guided endodontics, Energy dispersive X-ray spectroscopy, Torsional fracture
dc.subject.lembConductos obliterados
dc.subject.lembOdontología especializada
dc.subject.lembInstrumentación odontológica
dc.subject.lembCámara pulpar
dc.subject.proposalConducto esclerosado, Endodoncia guiada, Espectroscopía de rayos X de dispersión de energía, Fractura Torsional
dc.titleCaracterización metalúrgica y resistencia a la torsión de las fresas ULTRADRILL DENTOOLS® Y STECO®
dc.typebachelor thesis
dc.type.categoryFormación de Recurso Humano para la Ctel: Trabajo de grado de Especialización
dc.type.coarhttp://purl.org/coar/resource_type/c_7a1f
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.driveinfo:eu-repo/semantics/bachelorThesis
dc.type.localTrabajo de gradospa
dc.type.versioninfo:eu-repo/semantics/acceptedVersion

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