Subject	Dentistry, Oral Surgery and Medicine
Specific subject area	Craniofacial research: Occlusion, Growth and Development, Orthodontics, Orthopaedics and Surgery
Type of data	Table Figure
How the data were acquired	In 30 craniofacial cone-beam computed tomographies of dentate subjects, 36 cephalometric landmarks, 3 skeletal reference planes, muscle and load force vectors, muscle and load moment arms, and mechanical advantage for 7 masticatory muscles (superficial masseter, anterior and posterior deep masseters, anterior and posterior temporals, and medial and lateral pterygoids) at molar and incisal bite positions were determined.
Data format	Millimetres (mm) in a three-dimensional space. Orientation was defined as the xz plane being coronal, the yz plane sagittal, and the xy plane axial. To establish landmarks, the coordinate system and the origin (0, 0, 0) provided by Avizo Fire software 8.1 (Mercury Computer Systems, Inc., Berlin, BE, Germany) were utilized. The biomechanical model was constructed using Cabri 3D software 2.1.2 (Cabrilog, Grenoble, Isère, France).
Description of data collection	Means and standard deviations of 5 trials corresponding to cephalometric landmarks' coordinates (x, y, and z), muscle and load moment arm lengths (mm), and mechanical advantage ratios for masticatory muscles on the right and left sides. The main examiner repeated all measurements three times (trials 1, 2, and 3). Two other examiners carried out these measures only once (in trials 4 and 5, respectively). Intraexaminer and interexaminer comparisons of the variables were conducted using the Friedman test (α = 0.05), with random error estimated by the square root of the 'method of moments' variance estimator (MME).
Data source location	Institution: University of Ponta Grossa City/Town/Region: Ponta Grossa/Paraná/Sul Country: Brazil Latitude and longitude for collected samples/data: GPS: 25°5′23″S 50°6′23″W
Data accessibility	The dataset has been deposited into an open repository and is available under the following permanent specifications: Repository name: Mendeley Data Data identification number: 10.17632/92m49gvgh6.1 Direct URL to data: https://doi.org/10.17632/92m49gvgh6.1
Related research article	A. Sánchez-Ayala, A. Sánchez-Ayala, R.C. Kolodzejezyk, V.M. Urban, M.O. Lagravère, N.H. Campanha, A three-dimensional method to calculate mechanical advantage in mandibular function: Intra- and interexaminer reliability study, J. Orofac. Orthop. 84 (2023) 321–339. https://doi.org/10.1007/s00056-022-00378–7.