Park J B, Shaull K L, Overton B, Donly K J
Department of Biomedical Engineering, University of Iowa, College of Dentistry, Iowa City.
J Prosthet Dent. 1994 Oct;72(4):373-80. doi: 10.1016/0022-3913(94)90556-8.
Mouth guards and materials were tested to provide information for a more protective yet more comfortable product. Ethylene-vinyl acetate copolymer materials varying in thickness and stiffness were tested for their mechanical, thermal, and water-absorption properties. Thickness was measured before and after fabrication of the mouth guard. During fabrication, thicknesses decreased from 25% to 50% for the custom-fabricated mouth guards and 70% to 99% for the mouth-formed (boil-and-bite), off-the-shelf, over-the-counter mouth guards. The thicker the material is, the greater the resulting energy absorption is. It is therefore essential that the thickness in the occlusal portion of the mouth guard remain optimal after fabrication. A mouth guard with a stiffer insert, which softens at a higher temperature in the occlusal portion, is proposed as a more protective mouth guard.
对口腔防护器及其材料进行测试，以获取有关更具保护性且更舒适产品的信息。对厚度和硬度不同的乙烯-醋酸乙烯酯共聚物材料进行了机械性能、热性能和吸水性测试。在制作口腔防护器前后测量其厚度。在制作过程中，定制的口腔防护器厚度减少了25%至50%，而口成型（煮沸咬合式）、现成的非处方口腔防护器厚度减少了70%至99%。材料越厚，产生的能量吸收就越大。因此，至关重要的是，口腔防护器咬合部分的厚度在制作后要保持最佳状态。有人提出，一种在咬合部分温度较高时会软化的插入物更硬的口腔防护器是一种更具保护性的口腔防护器。
