1998 Fiscal Year Final Research Report Summary
Stability of orthodontic treated case observed by using of laser digitizing measurement system
| Project/Area Number |
08672389
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
矯正・小児・社会系歯学
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| Research Institution | TOKYO DENTAL COLLEGE |
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Principal Investigator |
MIYAZAKI Haruyo TOKYO DENTAL COLLEGE,DEPARTMENT OF DENTISTRY,ASSISTANT, 歯学部, 助手 (30174163)
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| Co-Investigator(Kenkyū-buntansha) |
MOTEGI Etsuko TOKYO DENTAL COLLEGE,DEPARTMENT OF DENTISTRY,LECTURER, 歯学部, 講師 (50147253)
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| Project Period (FY) |
1996 – 1998
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| Keywords | Orthodontics / Retention / Relaps / Stability / Dental model / Palate / Three-dimension alanalyzing system |
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| Research Abstract |
in this study we compared the posttreatment stability of occlusion in adults and adolescents treated for crowding or maxillary protrusion with four-premolar extractions and edgewise mechanics at an average of more than 4 years out of treatment. The adolescent sample showed a significantly greater posttreatment increase in mandibular anterior crowding than the adult sample. Posttreatment overjet and overbite remained more stable in the adolescents. We noted a correlation between in-treatment expansion and posttretment narrowing of mandibular intercanine width in the adults. Differences in postorthodontic occlusal changes were noted between the adult and adolescent samples.
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