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Effects of Three Different Orthodontic Treatment Methods on the Stability of Mandibular Incisor Alignment.
J Clin Pediatr Dent ; 41(6): 486-493, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29087804
ABSTRACT

OBJECTIVE:

To compare the effects of extraction, non-extraction and air-rotor stripping treatments on mandibular dental arch dimensions, lower incisor positions and evaluate their effects on the stability of the treatment. STUDY

DESIGN:

The sample consisted of 44 patients with Class I malocclusion and moderate crowding including 15 patients treated with extraction, 13 with air-rotor stripping (ARS), and 16 with non-extraction treatment. The records were taken at pretreatment (T0), end of active orthodontic treatment (T1), minimum 3 years post-treatment (T2). The model and cephalometric measurements were evaluated. For statistical analyses ANOVA and Welch test was applied.

RESULTS:

At post-retention period Little's irregularity indices were increased to 1.96 mm, 2.38 mm and 3.59 mm for extraction, ARS and non-extraction groups respectively (p<0.05). At T1-T2, intercanine widths were decreased significantly at all groups (p<0.05). The arch length and arch depth decreased significantly at extraction group (p<0.05) from T0 to T1 and remained the same at T2 (p>0.05). The lower incisors were retroclined with treatment and slightly proclined at post-retention period in extraction group. In ARS and non-extraction group, lower incisors proclined with treatment and remained the same at post-retention.

CONCLUSION:

At all groups the irregularity indices relapsed but did not return to pretreatment values. Although significant increase at intercanine width was only observed in non-extraction treatment, at post-retention phase, intercanine widths were significantly decreased at all groups. The changes at lower incisor inclinations relapsed slightly in extraction group but remained the same in the other groups.
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Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: MEDLINE Asunto principal: Ortodoncia Correctiva / Incisivo / Maloclusión de Angle Clase I Límite: Adolescente / Femenino / Humanos / Masculino Idioma: Inglés Revista: J Clin Pediatr Dent Asunto de la revista: Odontología / Pediatría Año: 2017 Tipo del documento: Artículo