ABSTRACT
Objective @#To explore the technology and efficacy of fabrication of a guide and removal of a fiber post by tetrahedron positioning technology at the chair side.@*Methods@# For one patient with acute chronic periapical periodontitis of the left maxillary lateral incisor who needed to have the fiber post removed, the chair side tetrahedral positioning technique was used to make a guide plate to remove the fiber post. Cone beam CT (CBCT) data were imported into the software to design the guide plate for fiber post removal. The guide plate design on CBCT was transferred to a solid model by using tetrahedral positioning technology. The guide plate was made to guide the removal of the fiber post, and then left maxillary lateral incisor root canal was performed. We evaluated the effect of fiber post removal with tetrahedral positioning technology by reviewing the literature.@*Results @#The guide plate made by tetrahedral positioning technology can accurately locate the position and direction of fiber posts at a low cost and with high speed. After the fiber post was removed, the root canal could be dredged by using root canal preparation instruments. After root canal preparation, the root canal was filled with warm gutta-percha to complete the root canal treatment. After 3 months, the apical radiograph showed that the transmission shadow of the apical area was reduced. The results of the literature review showed that the fiber post removal with guide plates provides a predictable result and a lower risk of iatrogenic damage. Minimally invasive treatment can be carried out, and chair time can be reduced.@*Conclusion@#On the basis of CBCT data, using tetrahedral positioning technology to make fiber post removal guides can help reduce the risk of fiber post removal and has the characteristics of speed, low cost and short chair side processing. However, the accuracy comparison between tetrahedral positioning technology and 3D printing guides needs further study.
ABSTRACT
@#With the development of implant technology, digital implant surgical guides have been used for precise implant position, angulation and depths of insertion, bringing great advantages such as shortening the operation time, reducing the risk of surgery, flapless implantation. Meanwhile, the disadvantages can't be neglected such as complicated production process, high cost, low precision etc. This article focuses on production, classification and accuracy of the digital implant surgical guide technology.
ABSTRACT
Introducción: la prótesis Inmediata es una alternativa de tratamiento protésico que sustituye inmediatamente los dientes extraídos. Generalmente se confecciona para reponer dientes anteriores, evitando el deterioro psíquico del paciente; en ocasiones, se hace necesario realizar además de las exodoncias de los dientes afectados, técnicas de cirugía preprotésica, como la Tuberoplastia o la Alveolectomía. Objetivo: mostrar que es posible realizar el tratamiento de rehabilitación con prótesis inmediata luego de una amplia resección quirúrgica. Presentación del caso: se presentó el caso de una paciente femenina de 58 años de edad, trabajadora activa, con antecedentes de buena salud. Refiriendo rechazo al período de desdentamiento. Al examen intrabucal presentaba incisivos centrales superiores con fractura oblicua mesial y movilidad de grado III por trauma, protrusión dentoalveolar marcada del sector anterosuperior, con resalte aumentado y reducción del espacio interalveolar en el sector posterior. Fue diagnosticada como desdentada parcial superior clase I, subclase I de Kennedy, y desdentada parcial Inferior clase I de Kennedy. Se decidió rehabilitar a la paciente por prótesis inmediata total superior, realizando previa Alveolectomía correctora y Tuberoplastia bilateral en una misma intervención quirúrgica. Resultados: con el tratamiento quirúrgico-aparatológico elegido se lograron excelentes resultados, mostrando las bondades de este tratamiento. Conclusiones: se obtuvo en la paciente buen resultado estético, funcional y psíquico.
Introduction: the Immediate Denture is a prosthetic treatment option. It substitutes the extracted teeth immediately. It is generally made to restore Front teeth, avoiding the patient's psychic trouble, sometimes becomes necessary to practice previous prosthetic surgery technics, such as reduction of hyperplastic tuberosities or Alveolectomy besides to make the exodontics of affected teeth. Objective: to show that it is possible to carry out the rehabilitation treatment with immediate prosthesis after a surgical wide resection. Case presentation: we presented a 58 year-old feminine patient, active worker with antecedents of good health. Besides she refereed she couldn't see herself without teeth. To the clinical exam it presents upper central incisors with mesial oblique fracture and III mobility grade, for trauma. Also shows marked dental and alveolar protrusion of the upper front sector, with increased overjet and overbite. And reduction of the interalveolar space in posterior area. Being diagnosed as upper partial toothless Kennedy's class I, subclass I, and inferior partial toothless Kennedy's class I.We decided to rehabilitate the patient for immediate complete upper denture carrying out previous Alveolectomy proofreader and bilateral reduction of hyperplastic tuberosities at the same surgical intervention. Results: with this prosthetic- surgical treatment excellent results were achieved showing the kindness of this treatment. Conclusions: an esthetic, functional and psychic good result was obtained for the patient.