Data of 3D models of human jaw with teeth, ligaments, and bone structures
Description
This dataset contains the necessary files to obtain the complete geometry of a human jaw, including its 14 teeth and the corresponding 14 periodontal ligaments. Independent models at the bone level of the alveolar and cortical bones, as well as of the teeth and ligaments, have been attached. All these models are available in .iges, .stl, and .sedoc formats. Additionally, a file with the complete assembly of all these geometries is included, which is ready to be used in Space Claim. This setup offers the advantage that the models can be used in any finite element analysis software to study stresses and deformations in orthodontic research or maxillofacial surgery. This dataset includes STL and IGES files for finite element model simulations on the mandible, teeth, and ligaments in environments where it is desired to understand the stresses or deformations of these structures to biomechanical assessment. This dataset is organized into three main folders. The first folder, named "Bones", includes two subfolders: "Cancellous" and "Cortical". Each of these subfolders contains three files representing models in different formats: .iges, .stl, and .sedoc, the latter being a native format of the Space Claim software from ANSYS R1 2020. The second folder, called "PDL", houses the models of the periodontal ligaments for teeth 37 to 47 in the same three aforementioned formats. These models are identified with a nomenclature that begins with the letter L followed by the corresponding tooth number. The third folder, "Teeth", contains the models of the mandibular teeth 37 to 47 in the same formats, with a nomenclature that starts with the letter D followed by the tooth number. Additionally, a file named "Assembly Lower Jaw Dataset Space Claim" is included, which contains the geometry of the complete lower jaw assembly, incorporating its 14 teeth and 14 periodontal ligaments.
Files
Steps to reproduce
To obtain these models, a DICOM file from a skeletal Class I patient without orthodontic history was used. Due to the limitations of DICOM segmentation for obtaining precise geometries of the crowns, an intraoral scan was performed with an iTero Element 2®, which creates a 3D image with a resolution of 34.20 pts/mm² and an accuracy of 94.53µm. The segmentation was carried out in 3D Slicer, processing the DICOM file and segmenting the lower jaw using thresholding (726-10081 HU) and tools such as “Scissors” and “Logical Operators”. The cortical and alveolar bone was manually segmented using thresholding and “Level Tracing”. The teeth were segmented with an adjusted threshold (1200-5202 HU) using tools like “Islands” and “Smoothing”. The scanned crowns were merged with the segmented tooth files in Meshmixer, creating solid elements in their correct position. The periodontal ligament was modeled by creating an external layer around the roots with a radial extrusion of 0.25 mm. The preparation of the models for simulation included remeshing in 3Matic at 0.25 mm, error correction, and exporting in STL format. In Rhino 7.0, a quadrangular NURBS remeshing was performed, exporting the files in IGES format.