Pearson G J, Hegarty S M
Br Dent J. 1989 Mar 11;166(5):162-5. doi: 10.1038/sj.bdj.4806750.
One hundred and twenty caries-free molar teeth were stored in saline. Three types of cavities were prepared in these teeth: conventional MOD, parallel-sided MOD with no buccal or lingual extensions, and a slit cavity. Cavity dimensions were recorded. Each group of teeth were restored with either a microfine or conventional composite, used in conjunction with a dentine adhesive. Cusp movement was recorded via two linear variable displacement transducers attached to the cusps. Using dye penetration studies, the marginal adaptation of the material to the teeth was assessed. In a small number of cases, the amount and type of cuspal movement and the degree of dye penetration was variable, depending on cavity design and the composite used, but generally cusp movement was unaffected by variation in cavity outline.
120颗无龋磨牙保存在盐水中。在这些牙齿上制备了三种类型的洞：传统的MOD洞、无颊侧或舌侧延伸的平行MOD洞和裂隙洞。记录洞的尺寸。每组牙齿用微细化复合树脂或传统复合树脂修复，并结合牙本质粘结剂使用。通过连接到牙尖的两个线性可变位移传感器记录牙尖运动。通过染料渗透研究，评估材料与牙齿的边缘适应性。在少数情况下，牙尖运动的量和类型以及染料渗透程度因洞型设计和使用的复合树脂而异，但一般来说，牙尖运动不受洞外形变化的影响。
