Maxillary retention: is longer better?
| Autor: | W J S Kerr, D L Destang |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Adult
Male Molar Cuspid medicine.medical_specialty Time Factors Adolescent Tooth Movement Techniques Cephalometry Statistics as Topic Dentistry Orthodontics Malocclusion Angle Class I Malocclusion Angle Class II Dental Arch Incisor Recurrence Maxilla medicine Humans Child business.industry Craniometry medicine.disease Surgery Dental arch medicine.anatomical_structure Scotland Maxillary incisor Female Malocclusion business Orthodontic Retainers Tooth Movement Technique |
| Zdroj: | The European Journal of Orthodontics. 25:65-69 |
| ISSN: | 1460-2210 0141-5387 |
| DOI: | 10.1093/ejo/25.1.65 |
| Popis: | Two different maxillary retention regimes were compared to ascertain if differences in posttreatment relapse existed. The patient pool was derived from subjects being treated at two orthodontic departments in the west of Scotland. Group 1 (20 patients) followed a 6 month regime using removable upper Hawley retainers for a period of 3 months full time and 3 months nights only. Group 2 (18 patients) followed a 1 year regime of 6 months full time and 6 months nights only. The results revealed that maxillary incisor alignment, as determined by Little's irregularity index, had relapsed by an average of 50 per cent of the end of retention value 3 months out of retention in Group 1 but only 23 per cent in Group 2. Although the actual mean values for relapse were 0.77 and 0.23 mm, respectively, seven subjects in Group 1 showed relapse of more than 3 mm as compared with only one in Group 2. This suggests that retaining a case for 1 year rather than 6 months is clinically beneficial. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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