[Nonradiological methods for implant surgical guide accuracy measurement].

Purpose: To evaluate the accuracy of static computer-navigated implantation with surgical guides, based on a non-radiological method. Traditional measurements with a second cone-beam CT (CBCT) were applied to verify the accuracy.

Methods: A total of thirty template-guided implantations were designed and performed on 15 resin models.

[Study on cushioning and energy absorption of sports mouthguard].

Purpose: Using impact test to study cushioning and energy absorption of sports mouthguard of different thickness, material and combination.

Methods: According to the thickness, material and combination, the mouthguards were divided into 7 groups with 6 testing pieces in each group. A pendulum device was used to apply impact energy to the mouthguard and dentition model, and the magnitude of the impact energy was measured by changing the release height of the pendulum.