替代腭平面测算APDI及ODI值

APDI and ODI estimated from substitute palate plane

目的:在非腭裂患者的X线头颅定位侧位片中寻找替代腭平面,并以替代腭平面估算APDI及ODI值,以期在腭裂患者中以替代腭平面来衡量估算APDI及ODI指标。方法:收集年龄为12～15岁的安氏Ⅰ类、Ⅱ类及Ⅲ类患者各30例,正常覆牙合、深覆牙合及开牙合病例各30例。拍摄头颅定位侧位片进行描绘。确立替代腭平面(PP’),测量指标包括PP与FH之交角、APDI值及ODI值;PP’与FH之交角,相应之APDI值(APDI’)及ODI值(ODI’)。以团体t检验分别比较安氏Ⅰ类、Ⅱ类及Ⅲ类各30例患者的APDI值与APDI’值;正常覆牙合、深覆牙合及开牙合病例各30例的ODI值与ODI’值。结果:在安氏Ⅰ类、Ⅱ类及Ⅲ类患者中,以替代腭平面估算所得的APDI值(APDI’)与以标准腭平面计算所得的APDI值比较无显著性差异,并存在APDI’值越大、磨牙关系越偏近中,APDI’值越小、磨牙关系越偏远中的规律。在正常覆牙合、深覆牙合及开牙合病例中,以替代腭平面估算所得的ODI值(ODI’)与以标准腭平面计算所得的ODI值比较,无显著性差异,并存在ODI’值越大、覆牙合越深、ODI’值越小、覆牙合越浅的规律。结论:以替代腭平面估算所得的ODI值(ODI’)和APDI值(APDI’)可以作为衡量垂直向及前后向发育的重要参考指标,尤其适用于对腭裂患者的评估。

PURPOSE: The substitute palate plane was defined at the cephalometrics of noncleft patients. APDI and ODI were estimated from substitute PP. It is expected that the APDI and ODI estimated from PP (APDI',ODI')can be extended to the cleft patients to illustrate the anteroposterior and vertical relationship between maxilla and mandible. METHODS:The cephalometrics of 30 patients of C-Ⅰ,C-Ⅱ and C-Ⅲ were traced and so were in 30 patients of normal overbite,deep overbite and open bite. The substitute palate plane(PP') was defined. The inclination of the PP to the FH, APDI and ODI , the inclination of the substitute PP to the FH ,APDI' and ODI' were measured. The APDI and APDI' of C-Ⅰ,C-Ⅱ and C-Ⅲ patients were compared,The ODI and ODI' of normal overbite ,deep overbite and open bite patients were also compared by group t test. RESULTS:There was no significant difference between APDI and APDI' in C-Ⅰ,C-Ⅱ and C-Ⅲ patients and also no significant difference between ODI and ODI' in normal overbite ,deep overbite and open bite patients. It is showed the higher the ODI',the deeper the overbite . And the higher the APDI', the more mesial the molar relationship. CONCLUSIONS:The APDI and ODI estimated from substitute PP can be used as an important criterion to judge the vertical and anteroposterior development of the the maxilla, especially in palate clefts patients.