Three-dimensional radiographic assessment of the mandibular interforaminal donor site in different vertical facial growth types - 05/05/21

Doi : 10.1016/j.jormas.2021.02.003

B. Husseini ^a,^b,⁎ , G. Khoury ^c , F. Riachi ^a, N. Ghosn ^b , N. Khoury ^a , F. Jerbaka ^d , J. Bouserhal ^b,^e,^f, R. Younes ^a,^b
^a Department of Oral Surgery, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon
^b Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon.
^c Department of Advanced Surgical Implantology, Service of Odontology, U.F.R. of Odontology, Rothschild Hospital, AP-HP, University Denis Diderot, Paris, France
^d Private Practice, Beirut, Lebanon
^e Department of Orthodontics, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon
^f Department of orthodontics, Henry M. Goldman School of Dental Medicine, Boston, USA

^⁎Corresponding author.

En prensa. Pruebas corregidas por el autor. Disponible en línea desde el Wednesday 05 May 2021
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Abstract

Purpose

To assess volumetrically, the impact of vertical facial growth types (VFGT) on the mandibular interforaminal region as a potential bone donor site.

Material and methods

60 cone beam computed tomography (CBCT) scans of adult individuals were classified in three groups according to their SN-GoGn angle: hypodivergent group (hG) (N=20), normodivergent group (NG) (N=19) and hyperdivergent group (HG) (N=21). Total harvestable bone volume (TBV), cortico-cancellous bone volume (CBV-cBV), and cortical bone surface (CBS) were evaluated. ANOVA test followed by Tukey post hoc tests were used to compare the mean continuous outcomes according to their VFGT.

Results

The whole sample showed a mean TBV of 1376.32±541.01mm³, CBV of 468.52±121.54mm³ and cBV of 908.73±474.71mm³. The mean CBS amounted to 782.58±146.80mm².

The comparison between the groups stated a significantly different mean TBV and cBV (-p-value<0.001). The mean CBS was significantly different (-p-value=0.015): the smallest for the NG, but not significantly different (-p-value<0.001): the highest for the HG, intermediate for the NG and the smallest for the hG.

Conclusion

Hypodivergent individuals have the thickest cancellous bone suitable for an onlay bone graft, while hyperdivergent individuals have the thinnest bone ideal for a 3D grafting approach.

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Keywords : Cone beam computed tomography, Symphysis, Bone donor site, Growth patterns, Cortical bone, Cancellous bone