European Journal of Therapeutics
Original Article

Evaluation of Stress Distribution in Mandibular Donor Site After Harvesting Bone Grafts of Different Sizes from the Symphysis


Departmen of Oral and Maxillofacial Surgery, Gaziantep University Faculty of Dentistry, Gaziantep, Turkey


Department of Mechanical Engineering, Dicle University Faculty of Engineering, Diyarbakır, Turkey

Eur J Ther 2020; 26: 238-244
DOI: 10.5152/eurjther.2020.20074
Read: 99 Downloads: 62 Published: 22 September 2020

Objective: The purpose of this study is to investigate the stress distribution in the mandibular donor site after harvesting bone grafts of different sizes from the symphysis by applying three different occlusal loads.

Methods: First, we constructed 16 experimental mandible models after harvesting the block grafts. We harvested rectangular-shaped and cylindrical block grafts of different sizes, localizations, and depths from the symphysis region. Three different occlusal loads were applied on the models. After the application of three occlusal loads on the models, we analyzed the von Mises stress distribution in the surface of the donor sites in the symphysis.

Results: In all the mandible models, the highest von Mises stress values were detected under incisal loads. Under the ipsilateral load of 300 N, the maximum von Mises stress was similar between R1 (unilateral one cylindrical graft) and R2 (unilateral two cylindrical grafts) models, and also between R1+1 (bilateral two cylindrical grafts) and R2+2 (bilateral four cylindrical grafts) models. The maximum von Mises stress under incisal load in the models measuring 20×10×4 mm (width, height, and depth, respectively) and 20×10×6 mm were 2.46 and 2.79 MPa, respectively. Among the unilateral models, the lowest maximum von Mises stress value was found in the R4 model (cylindrical graft: diameter=10 mm, depth=4 mm), and the highest value was found in the model measuring 15×10×6 mm under all the loads.

Conclusion: The application of incisal load led to a higher stress as than that of the bilateral and ipsilateral loads. The stress distribution in the symphysis donor site varies according to the localization, shape, and dimensions of the harvested grafts. Cylindrical grafts led to lower stress than the rectangular grafts.

How to cite: Yalçın M, Arı E. Evaluation of Stress Distribution in Mandibular Donor Site After Harvesting Bone Grafts of Different Sizes from the Symphysis. Eur J Ther 2020; 26(3): 238-44.

EISSN 2564-7040