ABSTRACT
Introdução: a obtenção de métodos de imagem capazes de reproduzir com adequada precisão as dimensões maxilomandibulares é de vital importância para o diagnóstico e o planejamento seguro de procedimentos cirúrgicos. Objetivo: verificar, in vitro, a precisão de medições lineares de um exame de tomografia computadorizada helicoidal e de dois sistemas de tomografia computadorizada por feixe cônico. Método: dez mandíbulas humanas secas foram submetidas a três diferentes exames de tomografia: CBCT i-CAT, CBCT NewTom 3G e HCT helicoidal Picker CT Twin Flash. As medições realizadas diretamente na mandíbula foram feitas com um paquímetro digital, e as tomográficas por meio do software ImplantViewer 2.604. Foram mensuradas seis regiões de cada mandíbula seca, sendo agrupadas em duas regiões de primeiro molar inferior (Sítio PMI), duas regiões de primeiro pré-molar inferior (Sítio PPMI) e em duas regiões de incisivo lateral inferior (Sítio ILI). Resultados: nos sítios ILI e PPMI, as três tomografias estudadas demonstraram precisão semelhante entre si. No sítio PMI, a CBCT i-CAT mostrou-se mais precisa que as dos demais sistemas. Conclusão: pode-se concluir que nos sítios ILI e PPMI as três TCs estudadas apresentam limites de concordância e de precisão semelhantes, e que no sítio PMI a CBCT i-CAT apresentou um limite de concordância de menor amplitude, sendo mais precisa que a dos demais exames.
Availability of imaging methods able to accurately reproducing the maxillo-mandibular dimensions is important for diagnosis and safe planning of surgical procedures. Aim: The aim of this in vitro study was to verify the accuracy of linear measurements in images obtained with a system of spiral and two systems of cone-beam computed tomography (CT). Methods: Ten dry human mandibles were subjected to three different CT scans: I-Cat® CBCT, NewTom-3G® CBCT, and Picker® SCT. Measurements in the mandible were made with a digital caliper and measurements in the images were made with the ImplantViewer® software. Six regions were measured in each dry mandible, being distributed into two regions in each of the lower first molar (LFM), lower first pre-molar (LFPM), and lower lateral incisor (LLI) sites. Results: Similar accuracy was observed among the three images at sites LLI and LFPM. Measurements obtained with the I-Cat CBCT scan at site LFM were shown to be more accurate than the those obtained with the other two CT scan systems. Conclusions: It can be concluded that the three CTs studied herein showed similar limits of agreement and precision at sites LLI and LFPM, and I-Cat CBCT showed limits of agreement with smaller amplitude and greater accuracy than other examinations performed at site LFM. Conclusion: It can be concluded that the three CTs studied herein showed similar limits of agreement and precision at sites LLI and LFPM, and ICat CBCT showed limits of agreement with smaller amplitude and greater accuracy than other examinations performed at site LFM.
Subject(s)
Humans , Cone-Beam Computed Tomography , Dimensional Measurement Accuracy , Oral Surgical Procedures, Preprosthetic/instrumentation , Spiral Cone-Beam Computed Tomography , Diagnostic Imaging , Imaging, Three-Dimensional , MandibleABSTRACT
Se presenta una técnica de expansión ósea que permite salvar dificultades de morfología en los rebordes maxilares durante elproceso de colocación de implantes intraóseos, a la vez que evitar el fresado tradicional. Se hace una descripción del instrumentaly se presentan tres casos clínicos resueltos con esta modalidad de trabajo.
An intra-osseous expansion technique is introduced, that allows to overcome morphology difficulties in the maxillary ridgesduring the placement of intra-osseous implants, avoiding at the same time traditional milling.A description of the set of instruments is made, and three clinical cases presented, which were resolved through this work method.
Subject(s)
Humans , Male , Female , Middle Aged , Dental Instruments , Alveolar Bone Loss/surgery , Oral Surgical Procedures, Preprosthetic/instrumentation , Oral Surgical Procedures, Preprosthetic/methods , Dental Implants , Dental Implantation/methodsABSTRACT
Los injertos de hueso esponjoso de la metáfisis proximal han demostrado ser una muy buena alternativa en cirugía maxilofacial e implantológica. se evaluaron diez pacientes, operados entre marzo y octubre de 2001. La técnica para la obtención de hueso esponjoso de la metáfisis tibial consiste en lograr un correcto acceso al tubérculo del tibial anterior o de Gerdy. La lesión de elementos anatómicos de importancia es obviada mediante la correcta ubicación de la incisión, la cual es previamente estudiada
Subject(s)
Humans , Male , Female , Dental Implantation, Endosseous , Jaw Diseases , Tibia , Transplantation, Autologous/methods , Bone Substitutes , Osteogenesis , Platelet-Derived Growth Factor , Oral Surgical Procedures, Preprosthetic/instrumentation , Plastic Surgery Procedures/instrumentation , Retrospective Studies , Surgical Flaps , Bone Transplantation/instrumentation , Bone Transplantation/methodsABSTRACT
Analizamos en nuestro trabajo la evolución clínica radiográfica de 45 pacientes que requerían intervencionaes bucales preprotésicas, donde empleamos la coralina cubana (hidroxiapatita), material de estructura similar de tejido óseo. Encontramos resultados excelentes en cuanto a la evolución de los pacientes tratados el año de examinados, lo que nos demostró que estamos ante un material altamente biocompatible con el hueso implantológico ideal