[APDI and ODI estimated from substitute palate plane].
OBJECTIVE
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.
Chen
Zhen-qi
ZQ
Dept. of Orthodontics, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai 200011, China.
Qian
Yu-fen
YF
Shen
Gang
G
Wang
Guo-ming
GM
D000293:Adolescent; D002648:Child; D002972:Cleft Palate / Q000473:pathology; D006801:Humans; D008311:Malocclusion, Angle Class I / Q000473:pathology; D008312:Malocclusion, Angle Class II / Q000473:pathology; D008313:Malocclusion, Angle Class III / Q000473:pathology; D010159:Palate / Q000033:anatomy & histology*; D014716:Vertical Dimension