Research of the occlusal phase during the masticatory movement

咀嚼运动过程中咬合阶段的研究

• 批准号: 12672004
• 负责人: HAYASAKI Haruaki
• 金额: $ 1.98万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12672004/
• 关键词: mastication; occlusal phase; cycle; pathway; children; primary dentition

The purposes of this study were 1) to establish the system, which could observe the occlusal contacts and the length of the glide during functional masticatory movements, and 2) to investigate the characteristics of the occlusal phase during chewing movements. The system has been built and reported in 2000 (J Dent Res, 79: 1890-1895). Also several characteristics of chewing movements in children with primary dentition compare with adults with healthy permanent dentition has been reported in 2000, 2001 and 2002 by means of this system (J Jpn Soc Stomatognath Funct, 6: 153-161, 2000; Jpn J Ped Dent, 38, 1025-1033, 2000; J Oral Rehabil, 28, 328-334, 2001; J Oral Rehabil, 29, 64-71, 2002). To elucidate the characteristics of occlusal phase in children, 1) the length of occlusal glides, 2) the stability of this length, 3) the stability of the position of the minimum opening position, 4) the stability of the maximum intercuspal position, 5) the sagittal and frontal projected angles both on the closing and opening pathway of masticatory cycles, and 6) correlations between the opening and closing pathways were examined.As results, 1) children with primary dentition had less variability on almost all variables, 2) chewing pattern was not the same between two groups, and 3) adults had relatively high correlations between the opening and closing pathway compared with children. These results might be caused by 1) relatively flat occlusal morphology including dentitions and TMJ, and 2) imprinted sucking behavior might exist even in children with primary dentition. Some finding suggested that these characteristics would be decreasing with their growth and development.This study could provide good information for the characteristics of the occlusal phase in children with primary dentition. However, further investigation will be required to obtain the clues for the functional diagnosis of the mandible.

本研究的目的是：1）建立功能性咀嚼运动时咬合接触和滑动长度的观察系统; 2）研究咀嚼运动时咬合相的特征。该系统已于2000年建立并报告（J Dent Res，79：1890-1895）。2000年、2001年和2002年，本系统还报道了乳牙期儿童与恒牙期健康儿童咀嚼运动的几个特征（J Jpn Soc Stomatognath Funct，6：153-161，2000; Jpn J Ped Dent，38，1025-1033，2000; J Oral Rehabil，28，328-334，2001; J Oral Rehabil，29，64-71，2002）。目的：探讨儿童咬合时相的特征，包括：（1）咬合滑动长度，（2）咬合滑动长度的稳定性，（3）最小张开位位置的稳定性，（4）最大牙尖交错位的稳定性，（5）咀嚼周期闭合和张开路径上的矢状和额状投影角，结果表明：1）乳牙期儿童在几乎所有变量上的变异性较小，2）两组儿童的咀嚼模式不同，3）成人与儿童相比，开放通路与关闭通路之间的相关性相对较高。这些结果可能是由于1）相对平坦的咬合形态，包括牙列和颞下颌关节，2）印迹吸吮行为可能存在于儿童乳牙列。研究结果表明，随着乳牙期儿童的生长发育，这些特征会逐渐减弱，本研究为乳牙期儿童的咬合时相特征提供了较好的信息。然而，需要进一步的调查，以获得线索的下颌骨的功能诊断。

项目成果

Hayasaki H et al,: "Length of the occlusal glide at the lower incisal point during chewing."Journal of Oral Rehabilitation. (In press).

Hayasaki H 等人：“咀嚼时下切点咬合滑动的长度。”口腔康复杂志。

I. Saitoh, H. Hayasaki et al.: "Masticatory movement during occlusal phase in children with primary dentition and women"J. Jpn. Soc. Stomatognath. Funct.. 9. 23-29 (2002)

I. Saitoh, H. Hayasaki 等：“乳牙列儿童和女性咬合阶段的咀嚼运动”J.

H. Hayasaki et al.: "Occlusal phase of gum-chewing strokes"Journal of Oral Rehabilitation. (In press).

H. Hayasaki 等人：“咀嚼口香糖中风的咬合期”口腔康复杂志。

Hayasaki H et al.: "Length of the glide during chewing in children with primary dentition"Journal of Oral Rehabilitation. (In pres).

Hayasaki H 等人：“乳牙列儿童咀嚼时的滑动长度”口腔康复杂志。

H. Hayasaki et al.: "Length of the glide during chewing in children with primary dentition"Journal of Oral Rehabilitation. (In press).

H. Hayasaki 等人：“乳牙列儿童咀嚼时的滑动长度”口腔康复杂志。