Kilic Nihat, Kiki Ali, Oktay Hüsamettin, Selimoglu Erol
Department of Orthodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkey.
Angle Orthod. 2008 May;78(3):409-14. doi: 10.2319/050407-217.1.
To test the null hypothesis that rapid maxillary expansion (RME) with a rigid bonded appliance has no effect on conductive hearing loss (CHL) in growing children.
Fifteen growing subjects (mean age 13.43 +/- 0.86 years) who had narrow maxillary arches and CHL participated in this study. Three pure-tone audiometric and tympanometric records were taken from each subject. The first records were taken before RME (T1), the second after maxillary expansion (T2) (mean = 0.83 months), and the third after retention (mean = 6 months) and fixed appliance treatment (approximately 2 years) periods (T3). The data were analyzed by means of analysis of variance (ANOVA) and least significant difference (LSD) tests.
Hearing levels of the patients were improved and air-bone gaps decreased at a statistically significant level (P < .001) during active expansion (T2-T1) and the retention and fixed appliance treatment (T2-T3) periods. Middle ear volume increased in all observation periods. However, a statistically significant increase was observed only in the T2-T3 period. No significant change was observed in the static compliance value.
The hypothesis is rejected. RME treatment has a positive and statistically significant effect on both improvements in hearing and normal function of the eustachian tube in patients having transverse maxillary deficiency and CHL.
检验关于使用刚性粘结矫治器进行快速上颌扩弓（RME）对正在生长发育儿童的传导性听力损失（CHL）无影响的零假设。
15名上颌弓狭窄且患有CHL的正在生长发育的受试者（平均年龄13.43±0.86岁）参与了本研究。对每位受试者进行了三次纯音听力测试和鼓室图记录。第一次记录在RME之前（T1），第二次在扩弓后（T2）（平均 = 0.83个月），第三次在保持期（平均 = 6个月）和固定矫治器治疗期（约2年）之后（T3）。数据通过方差分析（ANOVA）和最小显著差异（LSD）检验进行分析。
在积极扩弓期（T2 - T1）以及保持期和固定矫治器治疗期（T2 - T3），患者的听力水平得到改善，气骨导差在统计学上有显著降低（P <.001）。所有观察期内中耳容积均增加。然而，仅在T2 - T3期观察到统计学上的显著增加。静态声顺值未观察到显著变化。
该假设被拒绝。RME治疗对患有上颌横向发育不足和CHL的患者的听力改善和咽鼓管正常功能均具有积极且统计学上的显著效果。
