AIM: To investigate the changes occurring in the transverse dimension (dentoalveolar expansion) of the maxillary arch produced by a low-friction system, during the levelling and aligning phases of fi xed appliance treatment, and compare them with the changes obtained by functional and slow expansion therapy. MATERIALS AND METHOD: The low-friction protocol consisted of a combination of preadjusted brackets, superelastic nickel-titanium round archwires, and low-friction ligatures used in 25 consecutively treated patients in the mixed dentition with a negative transverse discrepancy (mean 4.32 mm). The treated group was compared with two other patient groups affected by a similar discrepancy: one was treated with slow dentoalveolar expansion therapy by using NiTi expanders and the other with functional appliances. The transversal palatal widths were measured on the dental casts after one year from the treatment start. RESULTS: With the use of the low-friction biomechanics, statistically signifi cant increases were recorded for all dentoalveolar widths. All the measurements showed an amount of expansion very similar to those induced by the slow expanders or functional appliances. CONCLUSIONS: The low-friction system produced statistically signifi cant increases in the transverse dentoalveolar width of the maxillary arch during the levelling and aligning phases of treatment with an average duration of 12 months.

Maxillary transverse expansion: clinical outcomes using low-friction biomechanics / A. Fortini; M. Lupoli; F. Giuntoli; L. Franchi; L. Orsi. - In: EUROPEAN JOURNAL OF ORTHODONTICS. - ISSN 1460-2210. - STAMPA. - 30:(2008), pp. e78-e78.

Maxillary transverse expansion: clinical outcomes using low-friction biomechanics.

FRANCHI, LORENZO;
2008

Abstract

AIM: To investigate the changes occurring in the transverse dimension (dentoalveolar expansion) of the maxillary arch produced by a low-friction system, during the levelling and aligning phases of fi xed appliance treatment, and compare them with the changes obtained by functional and slow expansion therapy. MATERIALS AND METHOD: The low-friction protocol consisted of a combination of preadjusted brackets, superelastic nickel-titanium round archwires, and low-friction ligatures used in 25 consecutively treated patients in the mixed dentition with a negative transverse discrepancy (mean 4.32 mm). The treated group was compared with two other patient groups affected by a similar discrepancy: one was treated with slow dentoalveolar expansion therapy by using NiTi expanders and the other with functional appliances. The transversal palatal widths were measured on the dental casts after one year from the treatment start. RESULTS: With the use of the low-friction biomechanics, statistically signifi cant increases were recorded for all dentoalveolar widths. All the measurements showed an amount of expansion very similar to those induced by the slow expanders or functional appliances. CONCLUSIONS: The low-friction system produced statistically signifi cant increases in the transverse dentoalveolar width of the maxillary arch during the levelling and aligning phases of treatment with an average duration of 12 months.
2008
A. Fortini; M. Lupoli; F. Giuntoli; L. Franchi; L. Orsi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/777347
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