Picton D C
Dental School, University College London, England, U.K.
Arch Oral Biol. 1988;33(5):301-4. doi: 10.1016/0003-9969(88)90061-1.
The intrusive mobility of 10 teeth was recorded at half-hourly intervals under 4N loads following reflection of the gingiva in 2 animals. After 3 h, the periodontal ligament surrounding the coronal area of the root was removed with a steel bur to a depth of 4 to 5 mm; loadings were then continued. For 5 teeth, little or no change in mobility occurred. Displacement increased in the other teeth which could be accounted for by tilting, the teeth not being vertical. The residual healthy ligament seemed to withstand the small vertical loads as though the periodontium was intact, whereas cutting the ligament, mesially and distally in a previous experiment, but not removing it, substantially weakened the supporting mechanisms.
在2只动物的牙龈翻瓣后，以4N的负荷每隔半小时记录10颗牙齿的侵入性移动情况。3小时后，用钢钻将牙根冠方区域周围的牙周膜去除至4至5毫米的深度；然后继续加载。5颗牙齿的移动性几乎没有变化或没有变化。其他牙齿的位移增加，这可能是由于牙齿不垂直而发生倾斜所致。剩余的健康牙周膜似乎能够承受较小的垂直负荷，就好像牙周组织完好无损一样，而在先前的实验中，在近中和远中切断牙周膜但不将其去除，会大大削弱支持机制。
