There are many occasions in which children are injured in the face and jaw while engaged in sports. About 10% of the injuries to the face and jaw occur while engaged in sports. Injury to the maxillar anterior teeth and mandibular fracture are among the most numerous unjuries. We noticed injury to the mandibular teeth and the mandibular bone during sport activities. We analyzed the status of the injury when the mouth guard is attached to the teeth using the finite element method.
The results were as follows;
1. It was considered that the effect of the external force on the mandibular teeth decreased when the mouth guard was attached.
2. As the thickness of the mouth guard material increased, the effect of the external force on the mandibular teeth decreased, but the effect on the mandibular process increased.
3. Concerning in the load of the mouth guard mesal position, the effect of the external force on the mandibular process decreased.
4. Concerning in the load of the mouth guard lateral position, the effect of the external force on the mandibular process increased.
We concluded that injury to the mandibular teeth was prevented when the mouth guard was attached but that consideration should be given to the effect on the mandible.