Effect on the Permanent Successors of the Labio-inclinated Orthodontic Force on the Maxillary Deciduous Incisors.
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Accession number;99A0437171
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| Title;Effect on the Permanent Successors of the Labio-inclinated Orthodontic Force on the Maxillary Deciduous Incisors. |
| Author;
YAWAKA YASUTAKA
(Hokkaido Univ., Sch. of Dent.)
AKIYAMA AKEMI
(Hokkaido Univ., Sch. of Dent.)
OSANAI MASAKAZU
(Hokkaido Univ., Sch. of Dent.)
HIRONAKA SHOJI
(Hokkaido Univ., Sch. of Dent.)
HARADA RIE
(Hokkaido Univ., Sch. of Dent.)
OGUCHI HARUHISA
(Hokkaido Univ., Sch. of Dent.)
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Journal Title;Japanese Journal of Pediatric Dentistry
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Journal Code:Y0025A
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ISSN:0583-1199
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VOL.37;NO.1;PAGE.55-61(1999)
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| Figure&Table&Reference;FIG.3, TBL.3, REF.20 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The purpose of this study was to investigate the effect on the permanent successors of the labio-in-clinated orthodontic force on the maxillary deciduous incisors. The subjects examined in the study were 16 children (7 boys and 9 girls) with anterior crossbite who were treated for crossbite in the deciduous dentition. The mean age at the beginning of the treatment was 5 years and 2 months. Two stages of lateral cephalograms were examined, one being taken at pretreatment and the other after correction of the overbite. The new points i, l and p were established on the cephalograms. Point i was the cutting margin, and points l and p were the labial and paratal cervical margins of maxillary permanent central incisor on the cephalograms. Measurement factors on the lateral cephalograms were i=SN; distance from point i to SN plane, i=Occ; distance from point i to occlusal plane, common SNA, U1-SN; inclination of the long axis of the maxillary deciduous central incisor to the SN plane and D; inclination of the long axis as the line through point i and the middle point between point p and l of the maxillary permanent central incisor to the SN plane. The data was compared at pretreatment and after correction. The values of i=SN and U1-SN after correction increased and i=Occ decreased statistcally (p<0.01) to the values of pretreatment. SNA and D did not, however, show any statistical difference. It was therefore shown that the labio-inclinated orthodontic force on the maxillary deciduous incisors had no great effect on permanent successors. (author abst.) |
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