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作 者:马斐斐[1] 胡秀莲[1] 李健慧[1] 林野[1]
机构地区:[1]北京大学口腔医学院·口腔医院口腔种植中心,100081
出 处:《中华口腔医学杂志》2013年第6期363-367,共5页Chinese Journal of Stomatology
基 金:基金项目:教育部高等学校博士学科点专项科研基金(20090001110101)
摘 要:目的探讨正常[牙合]不同[牙合]位[牙合]力分布规律,以期为临床提供参考。方法选择正常[牙合]志愿者53名,男性29名,女性24名,年龄20—31岁[平均(25.9±2.1)岁],使用T—Scan Ⅲ咬合分析系统,测量正常[牙合]牙尖交错[牙合]、前伸[牙合]及侧方[牙合]各牙的[牙合]力百分比及咬合时间,分析侧方[牙合]的[牙合]接触类型。结果正常[牙合]牙尖交错[牙合]时[牙合]力百分比最大的牙位依次为7、7、6和6,分别为(18.7±7.5)%、(15.7±7.1)%、(13.6±5.4)%和(13.3±4.3)%,7654 4567为[牙合]力集中区,[牙合]力百分比为(61.3±12.4)%;左侧[牙合]力百分比[(46.4±7.0)%]显著小于右侧[(53.6±7.0)%](P〈0.05)。前伸[牙合]时21 12为[牙合]力集中区,[牙合]力百分比为(85.1±25.5)%,左前区(123)与右前区(321)的[牙合]力百分比分别为(49.2±26.4)%和(48.1±26.6)%,差异无统计学意义(t=-0.15,P〉0.05)。左侧方[牙合]时尖牙保护[牙合]占28%(13/46),组牙功能[牙合]占33%(15/46),多重保护[牙合]占39%(18/46);右侧方验时尖牙保护[牙合]占30%(14/46),组牙功能[牙合]占44%(20/46),多重保护[牙合]占26%(12/46);侧方验时拾力升高时间和咬合分离时间分别为(0.34±0.11)和(1.00±0.39)s。结论20~30岁正常[牙合]牙尖交错[牙合]时第一前磨牙至第二磨牙是[牙合]力集中区,第二磨牙受力最大;前伸[牙合]时[牙合]力集中于21 12,侧方[牙合][牙合]接触类型具有多样性。Objective To investigate the normal occlusal force distribution and the characteristics of the occlusion time at different occlusion position using T-Scan Ⅲoeclusal analysis system. Methods Fifty-three volunteers with normal occlusion, including 29 males and 24 females, were included in this study. The average age was ( 25.9 ± 2. 1 ) years old. T-Scan Ⅲocelusal analysis system was used to measure the oeelusal force distribution and the time character of normal occlusion at intercuspal position, protrusive position, and lateral excursive position. Results At intereuspal position the left and right side molar teeth took the most part of force percentage, followed by ( 13.3 ± 4.3 ) % , ( 13.6 ± 5.4) % , ( 15.7 ± 7. 1 ) %, (18.7±7.5)% ( [6 , 6 , 17, 71 ); and 7654 4567took (61.3±12.4)% force percentage; and the left and right sides took the respective percentages of (46.4 ± 7.0)% , (53.6 ± 7.0)% , the left side was significantly less than the right side (P 〈 0. 05 ). At the protrusion position the region (21/12) commitment to take the percentage of ( 85.1 ± 25.5 ) %. At left and right lateral position, 28% (13/46) and 30% (14/46) were cuspid-protected occlusion, and 33% (15/46) and 44% (20/46) were group fuctional occlusion, and 39% (18/46) and 26% (12/46) were multiple-protected occlusion. The average occlusion time was (0. 34 ± 0. 11 ) s, and diselusion time was ( 1.00 ± 0. 39 ) s. Conclusions At intercuspal position the region from first premolar to second molar teeth were the occlusal force centers, and the second molar is the most;, the force concentrated in the area (21 112) at the protrusion position. The lateral occlusal pattern is multiformity.
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