Picton D C, Picton H M
University College London Dental School, England, U.K.
Arch Oral Biol. 1987;32(5):323-7. doi: 10.1016/0003-9969(87)90086-0.
Intrusive tooth mobility was recorded on anterior teeth in four adult male animals by linear variable-differential transformers. Reflection of the labial mucosa caused a significant increase in mobility at 4 N when the loading rate was slow (1 N s-1) but not when fast (100 N s-1). No significant additional increase in mobility was recorded after the apices were removed from eight incisors and canines. A further study on five incisors was made in which the displacement at 4 N load was noted half hourly during a control period of 5 or 6 h. Some weeks later, the sequence was repeated but the apices were resected after 3 or 4 h. As there was no increase in mobility for the majority of teeth following apicoectomy and, for two teeth studied in detail where there was an increase, that change was short lived; it seems that compression in the fundus of the socket is not a mechanism of importance in supporting the tooth against small intrusive loads.
通过线性可变差动变压器记录了四只成年雄性动物前牙的侵入性牙齿松动情况。当加载速率较慢（1 N/s）时，唇黏膜反射在4 N力时会导致松动显著增加，但加载速率较快（100 N/s）时则不会。从八颗切牙和尖牙切除根尖后，未记录到松动的显著额外增加。对五颗切牙进行了进一步研究，在5或6小时的对照期内，每半小时记录一次4 N负荷下的位移。几周后，重复该序列，但在3或4小时后切除根尖。由于大多数牙齿在根尖切除术后松动没有增加，并且在详细研究的两颗牙齿中，即使有增加，这种变化也是短暂的；因此，牙槽窝底部的压缩似乎不是抵抗小侵入性负荷支持牙齿的重要机制。
