ALVEOLAR RIDGE CHANGES IN PATIENTS CONGENITALLY MISSING MANDIBULAR 2ND PREMOLARS
ALVEOLAR RIDGE CHANGES IN PATIENTS CONGENITALLY MISSING MANDIBULAR 2ND PREMOLARS
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DOI：
10.1016/0022-3913(94)90022-1
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发表时间：
1994-02-01
影响因子：
4.6
通讯作者：
KOKICH, VG
中科院分区：
文献类型：
--
作者：
OSTLER, MS;KOKICH, VG
本研究调查了下颌第二前磨牙先天缺失患者牙槽嵴宽度随时间的变化。数据来自22名患者的35个无牙颌部位的石模和X线片，这些部位代表三个时间段：（1）拔除下颌第二磨牙前，（2）完成正畸治疗，（3）长期评估。结果表明，拔除乳磨牙后3年内牙槽嵴宽度减小25%。在未来三年，下降率将降至4%。牙槽嵴宽度的变化与拔牙时患者的年龄相关性较弱，但预测值较小。牙槽嵴宽度和高度的变化与拔牙后的时间或拔牙时患者的年龄之间没有相关性。
This study investigated changes in ridge width over time in patients who were congenitally missing mandibular second premolars. Data were obtained from stone casts and radiographs of 35 edentulous sites on 22 patients representing three time periods: (1) before extraction of the primary mandibular second molar, (2) completion of orthodontic treatment, and (3) long-term evaluation. The findings indicate that ridge width decreases 25% within 3 years after primary molar extraction. The rate of decrease diminishes to 4% over the next 3 years. The change in ridge width had a weak association with the age of the patient at the time of the extraction but a small predictive value. No correlation was found between changes in ridge width and height and the time since the extraction or the age of the patient at the time of extraction.