Data of synthetic 3D models of the human jaw, including teeth, ligaments, and bone structures
Description
All necessary files are included in this dataset to obtain the complete geometry of a human jaw, which includes the 14 teeth and the corresponding 14 periodontal ligaments. Models of the alveolar and cortical bones, as well as the teeth and ligaments, have been attached individually at the bone level. These models are accessible in the following formats:.iges,.stl, and.sedoc. Furthermore, a file containing the entire assembly of all of these geometries is included, and it is prepared for use in Space Claim. This configuration provides the advantage of allowing the models to be utilized in any finite element analysis software to investigate stresses and deformations in maxillofacial surgery or orthodontic research. This dataset contains STL and IGES files for finite element model simulations of the mandible, teeth, and ligaments in environments where it is desirable to understand the stresses or deformations of these structures for biomechanical assessment. The dataset is divided into three primary folders. The initial folder, "Bones," contains two subfolders: "Cancellous" and "Cortical." Each of these subfolders contains three files that represent models in distinct formats:.iges,.stl, and.sedoc. The latter is a native format of the Space Claim software from ANSYS R1 2020. The second folder, "PDL," contains the periodontal ligament models for teeth 37 to 47 in the same three formats as previously mentioned. These models are identified by a nomenclature that commences with the letter L and is 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 begins with the letter D followed by the tooth number. Furthermore, the "Assembly Lower Jaw Dataset Space Claim" file is included, which contains the geometry of the entire lower jaw assembly, including 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.