Condylar Movement in Relation to Hellman's Dental Age of Eruption

髁突运动与赫尔曼牙齿萌出年龄的关系

• 批准号: 07672247
• 负责人: ONO Toshiaki
• 金额: $ 1.34万
• 依托单位: AICHI GAKUIN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07672247/
• 关键词: computer-aided diagnostic axiograph; Hellman's Dental Age; condylar pathway; translation; rotation; mandibular movement; 顎関節; 顆頭; 顆路; アキシオグラフ; 小児

The purpose of this study was to determine the pathways of the condylar-components of the temporo-mandibular joint in relation to the different stages of tooth eruption. The condylar pathways during protrusion-retrusion, lateral excursion, opening-closing of Hellman's Dental Age stage II A,II C,III A and III C were analyzed using computer-aided diagnostic axiograph (CADIAX) from a total of 20 subjects. The results were as follows :1. At each stage, the condylar pathway appeared concave at all recorded movements.2. At Stage II A,the maximum translation value (sMax) during protrusion-retrusion was 9.8 mm, lateral extrusion was 11.5 mm and opening-closing was 13.0 mm. In comparison to the other stages, the maximum translation value of Stage II A was found to be significantly higher than the other stages.3. The values of maximum rotation (gamma max) for Stage II A was 38.1ﾟ, StageII C was 35.0ﾟ, Stage III A was 33.2ﾟand Stage III C was 31.1ﾟ.4. For the protrusion-retrusion movements with a Horizontal Condylar Inclination of 5 mm, the analyzed values for Stage II A was 37.3ﾟ, Stage II C was 41.6ﾟ, Stage II A was 46.6ﾟand Stage III C was 46.3ﾟ. Stage II A was found to be significantly lower than the other stages.5. The magnitude of translation of the condylar movement of Stage II A was small, Sowever, a bigger magnitude of rotation was observed.6. In the relationship between condylar rotation and translation during opening, a predominant appearance of rotation movement in initial stage were observed for Stages II A and II C ; and translation movement for Stages III A and III C.During the final stage of opening movement, the predominance of rotation movements was observed in all stages.7. A difference in the translation and rotation movements of the condyle during opening and closing were observed.

本研究的目的是确定颞下颌关节的髁状突成分与牙齿萌出的不同阶段之间的关系。应用计算机辅助诊断仪(CADIAX)对20例Hellman牙龄II A期、II C期、III A期和III C期患者的前伸后缩、侧移、开合过程中的髁突轨迹进行了分析。研究结果如下：1.在各个时期，所有记录到的运动均呈凹形。在II A期，最大平移值(Smax)为9.8 mm，侧向挤压为11.5 mm，张开关闭为13.0 mm。与其他阶段相比，阶段II A的最大翻译值显著高于其他阶段。II A期最大旋转(Gamma Max)为38.1ﾟ，II C期为35.0ﾟ，III A期为33.2ﾟ，III C期为31.1ﾟ。对于髁突水平倾斜度为5 mm的前伸后伸运动，II A期为37.3ﾟ，II C期为41.6ﾟ，II A期为46.6ﾟ，III C期为46.3ﾟ。第二阶段A显著低于其他阶段。II A期的髁突运动平移幅度较小，但旋转幅度较大。在打开过程中髁突旋转与平移的关系中，II A期和II C期以旋转运动为主，III A期和III C期以平移运动为主；在开放运动末期，所有阶段均以旋转运动为主。在打开和关闭过程中观察到髁突的平移和旋转运动的不同。