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The timing of significant arch dimensional changes with fixed orthodontic appliances: data from a multicenter randomised controlled trial.
J Dent. 2014 Jan; 42(1):1-6.JD

Abstract

OBJECTIVES

To identify the timing of significant arch dimensional increases during orthodontic alignment involving round and rectangular nickel-titanium (NiTi) wires and rectangular stainless steel (SS). A secondary aim was to compare the timing of changes occurring with conventional and self-ligating fixed appliance systems.

METHODS

In this non-primary publication, additional data from a multicenter randomised trial initially involving 96 patients, aged 16 years and above, were analysed. The main pre-specified outcome measures were the magnitude and timing of maxillary intercanine, interpremolar, and intermolar dimensions. Each participant underwent alignment with a standard Damon (Ormco, Orange, CA) wire sequence for a minimum of 34 weeks. Blinding of clinicians and patients was not possible; however, outcome assessors and data analysts were kept blind to the appliance type during data analysis.

RESULTS

Complete data were obtained from 71 subjects. Significant arch dimensional changes were observed relatively early in treatment. In particular, changes in maxillary inter-first and second premolar dimensions occurred after alignment with an 0.014in. NiTi wire (P<0.05). No statistical differences in transverse dimensions were found between rectangular NiTi and working SS wires for each transverse dimension (P>0.05). Bracket type had no significant effect on the timing of the transverse dimensional changes.

CONCLUSIONS

Arch dimensional changes were found to occur relatively early in treatment, irrespective of the appliance type. Nickel-titanium wires may have a more profound effect on transverse dimensions than previously believed.

CLINICAL SIGNIFICANCE

On the basis of this research orthodontic expansion may occur relatively early in treatment. Nickel-titanium wires may have a more profound effect on transverse dimensions than previously believed.

Authors+Show Affiliations

Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom. Electronic address: padhraig.fleming@gmail.com.Barts and The London School of Medicine and Dentistry, Barts Health Trust, United Kingdom.Barts and The London School of Medicine and Dentistry, Barts Health Trust, United Kingdom.Private Practice, Corfu, Greece; University of Bern, Switzerland.Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom.

Pub Type(s)

Comparative Study
Journal Article
Multicenter Study
Randomized Controlled Trial

Language

eng

PubMed ID

24269833

Citation

Fleming, Padhraig S., et al. "The Timing of Significant Arch Dimensional Changes With Fixed Orthodontic Appliances: Data From a Multicenter Randomised Controlled Trial." Journal of Dentistry, vol. 42, no. 1, 2014, pp. 1-6.
Fleming PS, Lee RT, Mcdonald T, et al. The timing of significant arch dimensional changes with fixed orthodontic appliances: data from a multicenter randomised controlled trial. J Dent. 2014;42(1):1-6.
Fleming, P. S., Lee, R. T., Mcdonald, T., Pandis, N., & Johal, A. (2014). The timing of significant arch dimensional changes with fixed orthodontic appliances: data from a multicenter randomised controlled trial. Journal of Dentistry, 42(1), 1-6. https://doi.org/10.1016/j.jdent.2013.11.010
Fleming PS, et al. The Timing of Significant Arch Dimensional Changes With Fixed Orthodontic Appliances: Data From a Multicenter Randomised Controlled Trial. J Dent. 2014;42(1):1-6. PubMed PMID: 24269833.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The timing of significant arch dimensional changes with fixed orthodontic appliances: data from a multicenter randomised controlled trial. AU - Fleming,Padhraig S, AU - Lee,Robert T, AU - Mcdonald,Tom, AU - Pandis,Nikolaos, AU - Johal,Ama, Y1 - 2013/11/20/ PY - 2013/10/02/received PY - 2013/11/02/revised PY - 2013/11/13/accepted PY - 2013/11/26/entrez PY - 2013/11/26/pubmed PY - 2015/12/15/medline KW - Bracket KW - Expansion KW - Orthodontic KW - Self-ligating SP - 1 EP - 6 JF - Journal of dentistry JO - J Dent VL - 42 IS - 1 N2 - OBJECTIVES: To identify the timing of significant arch dimensional increases during orthodontic alignment involving round and rectangular nickel-titanium (NiTi) wires and rectangular stainless steel (SS). A secondary aim was to compare the timing of changes occurring with conventional and self-ligating fixed appliance systems. METHODS: In this non-primary publication, additional data from a multicenter randomised trial initially involving 96 patients, aged 16 years and above, were analysed. The main pre-specified outcome measures were the magnitude and timing of maxillary intercanine, interpremolar, and intermolar dimensions. Each participant underwent alignment with a standard Damon (Ormco, Orange, CA) wire sequence for a minimum of 34 weeks. Blinding of clinicians and patients was not possible; however, outcome assessors and data analysts were kept blind to the appliance type during data analysis. RESULTS: Complete data were obtained from 71 subjects. Significant arch dimensional changes were observed relatively early in treatment. In particular, changes in maxillary inter-first and second premolar dimensions occurred after alignment with an 0.014in. NiTi wire (P<0.05). No statistical differences in transverse dimensions were found between rectangular NiTi and working SS wires for each transverse dimension (P>0.05). Bracket type had no significant effect on the timing of the transverse dimensional changes. CONCLUSIONS: Arch dimensional changes were found to occur relatively early in treatment, irrespective of the appliance type. Nickel-titanium wires may have a more profound effect on transverse dimensions than previously believed. CLINICAL SIGNIFICANCE: On the basis of this research orthodontic expansion may occur relatively early in treatment. Nickel-titanium wires may have a more profound effect on transverse dimensions than previously believed. SN - 1879-176X UR - https://www.unboundmedicine.com/medline/citation/24269833/The_timing_of_significant_arch_dimensional_changes_with_fixed_orthodontic_appliances:_data_from_a_multicenter_randomised_controlled_trial_ DB - PRIME DP - Unbound Medicine ER -