Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one child...Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one children with class In malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results： The resting pressures exerted on the labial side and palatine side of the upper lett incisor, as well as the labial side and lingual side of the lower lett incisor, were 0 g/cm^2, 0 g/cm^2, 0.57 g/cm^2 and 0.23 g/cm^2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm^2, 5.97 g/cm^2, 4.09 g/cm^2 and 7.89 g/cm^2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces （P〈0.01）, however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class Ⅲ malocclusion had lower pedoral forces. The upper labial resting forces （P〈0.01）, the lower labial resting forces （P〈0.05） and all the swallowing pressures from the lips and the tongue （P〈0.01） showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class Ⅲ malocclusion and normal occlusion. Conclusion： Patients with class Ⅲ malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis.展开更多
Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome o...Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome of the surgery Methods One hundred and forty consecutive Chinese patients with skeletal Class Ⅲ malocclusion who had been treated with a combined orthodontic and surgical approach were studied Sixty seven percent (40 males and 54 females) responded to a questionnaire Fifty four percent had two jaw deformities, 32% mandibular hyperplasia and 14% maxillary hypoplasia Surgical procedures: 77% received two jaw surgeries, 15% maxillary advancement and 8% mandibular setback This was a retrospective study based on questionnaires with numerical scale ranked answers (0: not at all; 1: a little; 2: moderately; 3: quite a bit; and 4: extremely) Results ANB angle was significantly negatively correlated with feelings about the nickname related to their facial problems (embarrassment: r =-0 30, P <0 01; worn out r =-0 32, P <0 01; angry r = -0 24, P <0 05) ANB angle also had a significant negative correlation with the reasons for having the surgery (pressure from their friends: r =-0 21, P <0 05, and referred by physician: r =-0 24, P <0 05) Changes in life style as a result of surgery were significantly negatively correlated with the ANB angle before treatment, positive influence on relationships with the opposite sex ( r =-0 25, P <0 05), positive influence in social activiies ( r =-0 22, P <0 05) Conclusion The psychological status before surgery and the outcome following orthognathic surgery in patients with skeletal Class Ⅲ malocclusion were closely related to severity of the malocclusion展开更多
目的:采用CBCT评价前牵引矫治上颌发育不足患者治疗前后的颞下颌关节变化。方法:选取就诊于上海市黄浦区第二牙病防治所正畸科11~13岁骨性Ⅲ类、上颌发育不足的患儿40例,随机纳入种植体牵引组和支架牵引组,每组20例。对患者进行前牵引矫...目的:采用CBCT评价前牵引矫治上颌发育不足患者治疗前后的颞下颌关节变化。方法:选取就诊于上海市黄浦区第二牙病防治所正畸科11~13岁骨性Ⅲ类、上颌发育不足的患儿40例,随机纳入种植体牵引组和支架牵引组,每组20例。对患者进行前牵引矫治12个月,治疗前后采用德国西诺德公司OTHOPHOS XG 3D Ceph三合一数字化摄片机拍摄头颅定位侧位片以及两侧处于牙尖交错位的颞下颌关节CBCT,对治疗前头影测量、颞下颌关节前间隙、上间隙、后间隙、颞下颌关节窝深度、髁突前后径、髁突近远中径和髁突倾斜度进行测量分析;另选取平均年龄11~13岁骨性I类未经正畸治疗的15例患儿为对照组,在知情告知下不进行任何正畸治疗,对其1年前后的颞下颌关节CBCT进行测量。结果:种植体牵引组和支架牵引组治疗后CBCT均显示颞下颌关节前间隙显著增大,上间隙和后间隙显著减小,髁状突倾斜角增大,髁状突在关节窝中向后上移位,颞下颌关节深度在治疗前后增大,增长量种植体牵引组较支架牵引组略大,说明前牵引后关节窝有明显的生长改建。结论:采用上颌前牵引矫治上颌骨发育不足的病例中,上颌骨均有明显生长,颞下颌关节深度增加,髁突位置向后上移位,有利于颞下颌关节发育。展开更多
基金Project (No.2002ZX040) supported by the Health Bureau of Zhejiang Province,China
文摘Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one children with class In malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results： The resting pressures exerted on the labial side and palatine side of the upper lett incisor, as well as the labial side and lingual side of the lower lett incisor, were 0 g/cm^2, 0 g/cm^2, 0.57 g/cm^2 and 0.23 g/cm^2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm^2, 5.97 g/cm^2, 4.09 g/cm^2 and 7.89 g/cm^2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces （P〈0.01）, however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class Ⅲ malocclusion had lower pedoral forces. The upper labial resting forces （P〈0.01）, the lower labial resting forces （P〈0.05） and all the swallowing pressures from the lips and the tongue （P〈0.01） showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class Ⅲ malocclusion and normal occlusion. Conclusion： Patients with class Ⅲ malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis.
文摘Objective To study the relationship between severity of skeletal Class Ⅲ malocclusion and the patient's emotional status, as well as motivation for seeking surgical correction and satisfaction with the outcome of the surgery Methods One hundred and forty consecutive Chinese patients with skeletal Class Ⅲ malocclusion who had been treated with a combined orthodontic and surgical approach were studied Sixty seven percent (40 males and 54 females) responded to a questionnaire Fifty four percent had two jaw deformities, 32% mandibular hyperplasia and 14% maxillary hypoplasia Surgical procedures: 77% received two jaw surgeries, 15% maxillary advancement and 8% mandibular setback This was a retrospective study based on questionnaires with numerical scale ranked answers (0: not at all; 1: a little; 2: moderately; 3: quite a bit; and 4: extremely) Results ANB angle was significantly negatively correlated with feelings about the nickname related to their facial problems (embarrassment: r =-0 30, P <0 01; worn out r =-0 32, P <0 01; angry r = -0 24, P <0 05) ANB angle also had a significant negative correlation with the reasons for having the surgery (pressure from their friends: r =-0 21, P <0 05, and referred by physician: r =-0 24, P <0 05) Changes in life style as a result of surgery were significantly negatively correlated with the ANB angle before treatment, positive influence on relationships with the opposite sex ( r =-0 25, P <0 05), positive influence in social activiies ( r =-0 22, P <0 05) Conclusion The psychological status before surgery and the outcome following orthognathic surgery in patients with skeletal Class Ⅲ malocclusion were closely related to severity of the malocclusion
文摘目的:采用CBCT评价前牵引矫治上颌发育不足患者治疗前后的颞下颌关节变化。方法:选取就诊于上海市黄浦区第二牙病防治所正畸科11~13岁骨性Ⅲ类、上颌发育不足的患儿40例,随机纳入种植体牵引组和支架牵引组,每组20例。对患者进行前牵引矫治12个月,治疗前后采用德国西诺德公司OTHOPHOS XG 3D Ceph三合一数字化摄片机拍摄头颅定位侧位片以及两侧处于牙尖交错位的颞下颌关节CBCT,对治疗前头影测量、颞下颌关节前间隙、上间隙、后间隙、颞下颌关节窝深度、髁突前后径、髁突近远中径和髁突倾斜度进行测量分析;另选取平均年龄11~13岁骨性I类未经正畸治疗的15例患儿为对照组,在知情告知下不进行任何正畸治疗,对其1年前后的颞下颌关节CBCT进行测量。结果:种植体牵引组和支架牵引组治疗后CBCT均显示颞下颌关节前间隙显著增大,上间隙和后间隙显著减小,髁状突倾斜角增大,髁状突在关节窝中向后上移位,颞下颌关节深度在治疗前后增大,增长量种植体牵引组较支架牵引组略大,说明前牵引后关节窝有明显的生长改建。结论:采用上颌前牵引矫治上颌骨发育不足的病例中,上颌骨均有明显生长,颞下颌关节深度增加,髁突位置向后上移位,有利于颞下颌关节发育。
