Three-Dimensional Biomodels: Use of Different Materials for the Surgical Planning in Relation to Two Mandibular Cysts Cases

Astigueta José Mariano,Benitez Javier Alejandro,Mendoza Cuello Norbin José,Giannunzio Graciela Ana,Attaguile Alberto

doi:10.31487/j.dobcr.2020.05.01

Abstract

Introduction: The use of three-dimensional models in the diagnosis, planification and treatment of the maxillofacial area pathology has been included in publications since 1980, and has enabled to minimize surgical time, reducing peri and postoperative morbidity, and optimizing surgical results. Currently, the market offers a huge range of 3D printers and materials which allows biomodels to be printed for medical purposes. The purpose of the following paper is to describe the use of two types of three-dimensional models in the therapeutic planning of two cases of mandibular cysts. Case Report: Two cases of mandibular dentigerous cysts are described, in which osteosynthesis plates were used to prevent pathological fractures, pre-modeled together with acrylic positioners on three-dimensional models and printed in different ways. Postoperative clinical and tomographic controls were performed. Conclusion: The knowledge of the properties of the different materials available for the construction of three-dimensional models allows selecting the one that best suits the case needs required, minimizing surgical times and optimizing the results.

Highlights

The use of three-dimensional models in the diagnosis, planification and treatment of the maxillofacial area pathology has been included in publications since 1980, and has enabled to minimize surgical time, reducing peri and postoperative morbidity, and optimizing surgical results
The market offers a huge range of 3D printers and materials which allows biomodels to be printed for medical purposes
Within the Oral and Maxillofacial Surgery (OMFS) field, the arrival of different imaging techniques and a wide range of software options to carry them out have transformed the methodology used for diagnostics, therapeutic planning, and postoperative follow-ups of all the pathologies this speciality covers [1, 2]

Summary

Introduction

Nowadays, introducing technology to all medical fields is a necessity, such as during diagnostic procedures like the planning and treatment of pathologies that take place in different medical and dental specialties. Stereolithographic models polymerized by UV light offer mechanical strength and thermal stability This technique allows starting with the drilling process for the pre-selection of screws, the cutting process to delimit resections and the sterilization using autoclave or ethylene oxide, which makes possible its use during the surgery. The models made by FDM technique are useful for educational purposes, identification of anatomical structures, and pre-molding of titanium plates Since they are made of thermoplastic materials, they cannot be sterilized by conventional methods, and drilling process for the pre-selection of screws and cutting process causes a significant deformity on the model, which limits its function during the surgery planning. The anterior showed retentions around the plate, holding around the basal, and a hole for an IMF screw, having measured it in the CBCT to avoid dental or nerve lesions (Figure 10). The postoperative result was evaluated through a panoramic radiograph and computed tomography, which showed a proper adaptation of the osteosynthesis to the contour of the mandible (Figure 12)

Discussion