Raw data from mandibular measurements and fracture pattern classification

Published: 29 June 2018| Version 1 | DOI: 10.17632/s9gbrkz8j7.1
Giovanni Cunha


Considering the possible influence of the bone thickness on the fracture pattern after bilateral sagittal split osteotomy (BSSO). Pre and immediate postoperative tomographies in DICOM format of 62 surgical sites submitted to BSSO were analyzed by Dolphin 3D software. Preoperative analyses: 4 thickness measurements: A - 1.5 milimeter (mm) above the lingula. B - 1mm from the anterior border of the ramus. C - 5mm distally to the second molar and 5mm from the upper border of the mandible (retromolar region) D - Region between the first and second molars. Postoperative CT scans: Used to classify the split pattern in I, II, III or IV. The data were analyzed by Kruskal-Wallis test followed by the Dunn post-test. Results showed 35 type I, 01 type II, 19 type III and 07 type IV. Type I presented the highest thickness average values for the four measurements, whereas type IV presented the lowest values. The variable bone thickness was statistically significant only for point A, when the types I and IV were compared. Results allowed to conclude that thinner mandibles at ramus are more prone to bad splits and thickness at points B, C and D did not influence the fracture patterns.


Steps to reproduce

All measurements were performed with the "Measure" tool in Dolphin 3D software (coronal view)


Universidade Estadual Paulista Julio de Mesquita Filho Faculdade de Odontologia Campus de Araraquara


Cone Beam Computed Tomography, Orthognathic Surgery