Protocolo Abreviado Guiado Digital: Técnicas de Marcadores Tisulares, Silicona de Registro y CBCT con Sonrisa / Digitally Guided Abbreviated Protocol: Tissue Marker Techniques, Recording Silicone and CBCT with Smile

Establecer un protocolo de cirugía guiada estática con técnicas referenciales para ser realizado de manera predecible, repetible y simple, en todos los tipos de casos. El protocolo abreviado guiado digital para cirugía guiada estática para implantes se centra en diseñar computacionalmente una guía quirúrgica que se apoye en el tejido remanente del paciente, siendo un protocolo digital versátil para la cirugía y rehabilitación implanto protésica, basada en registros clínicos, principalmente la línea de la sonrisa y la captación de ésta en tomografía de haz cónico (CBCT), además de establecer dimensión vertical oclusal (DVO). Logrando así, planificación de implantes hasta la inserción inmediata de la prótesis temporal. Se ejemplifica el trabajo con 2 casos clínicos. Se establece un protocolo con la intención de que pueda ser realizado en pacientes desdentados parciales (Técnica de Registro Silicona) o totales (Técnica de Marcadores Tisulares en prótesis), definiendo un flujo de trabajo tridimensional, digital y optimizado, con un consecuente ahorro de tiempo clínico. Como principio del protocolo de cirugía guiada es lograr el objetivo quirúrgico - protésico deseado con alta precisión. La cirugía y rehabilitación de implantes de manera convencional es altamente dependiente del operador por lo que la alternativa de cirugía guiada de manera estática es una herramienta más para mejorar el pronóstico del paciente. Se establece un protocolo digital simple y efectivo, de cirugía guiada, para la rehabilitación implanto protésica basada en la línea de la sonrisa, tomografía de haz cónico (CBCT), dimensión vertical oclusal (DVO). Protocolo predecible y que optimiza los tiempos clínicos, logrando una rehabilitación protésica inmediata acorde e individualizada para cada paciente.

Establish a static guided surgery protocol with referential techniques to be performed in a predictable, repeatable and simple way, in all types of cases. The abbreviated digital guided protocol for static guided surgery for implants focuses on computationally designing a surgical guide that rests on the patient's remaining tissue, being a versatile digital protocol for prosthetic implant surgery and rehabilitation, based on clinical records, mainly the line of the smile and its uptake in cone beam tomography (CBCT), in addition to establishing occlusal vertical dimension (OVD). Thus achieving implant planning until the immediate insertion of the temporary prosthesis. The work is exemplified with 2 clinical cases. A protocol is established with the intention that it can be carried out in partially edentulous patients (Silicone Registration Technique) or total (Tissue Marker Technique in prostheses), defining a three-dimensional, digital and optimized workflow, with a consequent saving of time. clinical. As a principle of the guided surgery protocol, it is to achieve the desired surgical-prosthetic objective with high precision. Conventional implant surgery and rehabilitation is highly dependent on the operator, so the alternative of statically guided surgery is one more tool to improve the patient's prognosis. A simple and effective digital protocol for guided surgery is established for prosthetic implant rehabilitation based on the smile line, cone beam tomography (CBCT), and occlusal vertical dimension (OVD). Predictable protocol that optimizes clinical times, achieving an immediate and individualized prosthetic rehabilitation for each patient.

Avaliação da fidedignidade da tomografia computadorizada de feixe cônico para uso na cirurgia guiada em implantodontia / Evaluation of the fidedignity of Cone beam computed tomography for use in implantodonty guided surgery

Introdução: a cirurgia guiada é uma técnica de planejamento virtual para instalação de implantes dentários que possibilita maior precisão e confiabilidade para o cirurgião, possibilitando menor morbidade ao paciente. Entretanto existem erros e distorções durante o processo, que podem resultar em desvios no posicionamento dos implantes. Objetivo: aferir a fidedignidade da tomografia computadorizada de feixe cônico para uso em cirurgia guiada, comparando as medidas reais dos corpos de prova com as obtidas pela tomografia de feixe cônico para identificar distorções e quantificá-las. Metodologia: Foram utilizados três corpos de prova posicionados para tomada tomográfica. 180 medidas foram realizadas com paquímetro digital, e então, submetidos à tomografia computadorizada de feixe-cônico. Após a obtenção das imagens, os pontos foram medidos na tomografia e os valores obtidos no corpo de prova e os da tomografia foram comparados e analisados. Resultados: em 80% das medidas, a tomografia foi superestimada e em 18,33%, mostrou-se menor. Em uma medida (1,67%), as médias dos corpos de prova e da tomografia impressa foram iguais. Na região anterior, a diferença das aferições da tomografia impressa e do corpo de prova foi de 0,45mm, na região posterior foi de 0,34mm, em média. Conclusão: a tomografia computadorizada de feixe cônico é uma ferramenta confiável desde que sejam observadas as margens de erro que apresenta. A aquisição de imagens é apenas uma das etapas da cirurgia guiada, a qual apresenta erros cumulativos que podem comprometer o resultado final se não forem observados e contornados pela experiência do cirurgião.

Introduction: guided surgery is a technique of virtual planning of placement of dental implants that allows greater precision and reliability for the surgeon, allowing less patient morbidity. However, there are errors and distortions during the process, which can result in deviations in implant placement. Objective: to assess the reliability of concomitant computed tomography for use in guided surgery by comparing the actual measurements of the specimens with those obtained by conical beam tomography to identify distortions and quantify them. Methodology: three specimens positioned for tomography were used. 180 measurements were performed with a digital caliper, and then, submitted to computed tomography of beams. After obtaining the images, the points were measured on the tomography and the values obtained in the test specimen and those of the tomography were compared and analyzed. Results: in 80% of the measurements, the tomography was overestimated and in 18.33%, it was lower. In one measurement (1.67%), the means of the test specimens and the printed tomography were the same. In the anterior region, the difference between the measurements of the printed tomography and the test specimen was 0.45mm, in the posterior region it was 0.34mm, on average. Conclusion: conebeam computed tomography is a reliable tool as long as the margins of error are observed. The acquisition of images is only one of the stages of guided surgery, which presents cumulative errors that can compromise the final result if not observed and circumvented by the experience of the surgeon.

Flapless implant placement with digital 3D imaging and planning system in fully edentulous patient: A case report and 5-year follow-up / 대한치과보철학회지

One of the fastest growing segments of implant dentistry is the utilization of computed tomography (CT) scan data and treatment planning software in conjunction with guided surgery for implant reconstruction cases. Computer assisted planning systems and associated surgical templates have established a predictable, esthetic, functional technique for placing and restoring implants. Especially, a philosophy of restoratively driven implant placement has been generally adopted. Recently, a variety of commercial dental fields have released their scanning and fabricating protocols and methods for restorations. This process is still being investigated and developed for the most precise and predictable outcome. This case report describes a female patient who wanted dental implants in fully edentulous areas. Restoratively driven implant placements were performed with surgical guide and the patient was fully satisfied with the clinical results, and at 5-year post restorative follow-up assessment, both implant and prosthesis were proved clinical success.

Accuracy of computer-guided surgery / La precisión de la cirugía guiada por ordenador

Dental implant fixation techniques are widely studied in order to reduce surgical morbidity. Computer-guided flapless surgery has been considered an efficient alternative that presents several advantages and some limitations. This technique allows the virtual planning and simulation of the prosthetic-surgical treatment that can help predict the difficulties and limitations in order to reduce possible errors. In addition to the prosthetic predictability, computer-guided surgery enhances accuracy and reduces surgical morbidity. Thus, the aim of this study was to report on a 7-year follow-up of immediately loaded implants inserted into an edentulous maxilla using virtual planning and flapless surgery.

Las técnicas de fijación del implante dental se estudian ampliamente para reducir la morbilidad quirúrgica. La cirugía sin flapless guiada por ordenador ha sido considerada como una alternativa eficiente con varias ventajas y algunas limitaciones. Esta técnica permite la planificación virtual y simulación del tratamiento protésico quirúrgico con la predicción de las dificultades y limitaciones para reducir posibles errores. Además de la previsibilidad de prótesis, la cirugía guiada por ordenador mejora la precisión y reduce la morbilidad quirúrgica. Por lo tanto, el objetivo de este estudio fue reportar a 5 años de seguimiento de los implantes de carga inmediata insertados en un maxilar desdentado utilizando la planificación virtual y la cirugía sin colgajo. El presente caso prospectivo informó el éxito del tratamiento y destacó la importancia de la planificación, lo que justifica el costo de esta tecnología.

Reabilitação de maxila em carga imediata utilizando técnica guiada flapless, baseada em planejamento virtual pré-cirúrgico: relato de caso clínico / Rehabilitation of the maxilla with computer-assisted flapless surgery according to virtual preoperative planning: A case report

A técnica da cirurgia guiada, associada à tecnologia CAD/CAM, auxilia na busca de precisão na instalação de implantes osseointegráveis, pois segue um planejamento virtual que permite a visualização em software da relação da necessidade protética com a quantidade óssea disponível. Objetivo: o objetivo desse trabalho é relatar um caso de reabilitação de arcada superior com utilização do sistema NeoGuide (Neodent, Curitiba/PR), com técnica guiada flapless em carga imediata. Métodos: após o preparo pré-tomográfico e o planejamento virtual, foram instalados oito implantes Titamax EX cone-morse (Neodent) com a utilização de um guia cirúrgico prototipado. Após a instalação dos implantes, foi realizado exame radiográfico panorâmico e tomografia computadorizada. Em seguida, foi instalada uma prótese fixa implantossuportada. Conclusão: a utilização de técnica guiada flapless em carga imediata mostrou-se um recurso valioso no tratamento de reabilitações de arcadas superiores edêntulas, com redução do tempo cirúrgico e diminuição dos sintomas pós-operatórios, como dor, edema e inflamação.

Computer-guided surgery combined with CAD/CAM technology is a useful technique for placement of osseointegrated dental implants with utmost accuracy, since it employs virtual planning technology which allows visualization by a computer software of the relationship between one’s prosthetic needs and the amount of bone available. Objective: The aim of this studywas to report a case of maxillary rehabilitation with the use of the Neoguide system (Neodent®,Curitiba, Brazil), with the aid of computer-guided flapless technique and immediate loading. Methods: after pre tomographic preparation and virtual planning, eight Titamax EX Morse taperimplants (Neodent®, Curitiba, Brazil) were placed using a prototyped surgical guide. After implantplacement, panoramic radiographs and CT scans were performed. Subsequently, a fixed implant supported denture was installed. Conclusion: The use of computer-guided flapless surgery with immediate loading proved a valuable resource in maxillary rehabilitation, with reduced surgical time and decreased post-operative symptoms such as pain, swelling and inflammation.

Accuracy of 5-axis precision milling for guided surgical template / 대한치과보철학회지

PURPOSE: The template-guided implant surgery offers several advantages over the traditional approach. The purpose of this study was to evaluate the accuracy of coordinate synchronization procedure with 5-axis milling machine for surgical template fabrication by means of reverse engineering through universal CAD software. MATERIALS AND METHODS: The study was performed on ten edentulous models with imbedded gutta percha stoppings which were hidden under silicon gingival form. The platform for synchordination was formed on the bottom side of models and these casts were imaged in Cone beam CT. Vectors of stoppings were extracted and transferred to those of planned implant on virtual planning software. Depth of milling process was set to the level of one half of stoppings and the coordinate of the data was synchronized to the model image. Synchronization of milling coordinate was done by the conversion process for the platform for the synchordination located on the bottom of the model. The models were fixed on the synchordination plate of 5-axis milling machine and drilling was done as the planned vector and depth based on the synchronized data with twist drill of the same diameter as GP stopping. For the 3D rendering and image merging, the impression tray was set on the conbeam CT and pre- and post-CT acquiring was done with the model fixed on the impression body. The accuracy analysis was done with Solidworks (Dassault systems, Concord, USA) by measuring vector of stopping's top and bottom centers of experimental model through merging and reverse engineering the planned and post-drilling CT image. Correlations among the parameters were tested by means of Pearson correlation coefficient and calculated with SPSS (release 14.0, SPSS Inc. Chicago, USA) (alpha = 0.05). RESULTS: Due to the declination, GP remnant on upper half of stoppings was observed for every drilled bores. The deviation between planned image and drilled bore that was reverse engineered was 0.31 (0.15 - 0.42) mm at the entrance, 0.36 (0.24 - 0.51) mm at the apex, and angular deviation was 1.62 (0.54 - 2.27)degrees. There was positive correlation between the deviation at the entrance and that at the apex (Pearson Correlation Coefficient = 0.904, P = .013). CONCLUSION: The coordinate synchronization 5-axis milling procedure has adequate accuracy for the production of the guided surgical template.