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Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding.

Mutinelli S, Manfredi M, Guiducci A, Denotti G, Cozzani M - Prog Orthod (2015)

Bottom Line: However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment.The patients were compared with three balanced control groups (in total, 60 individuals) matched for gender.The Haas expander anchored to the deciduous teeth is effective in increasing the dental arch width in patients with a lateral cross-bite.

View Article: PubMed Central - PubMed

Affiliation: Private practice, via Brennero 260/B, 38121, Trento, Italy, sabrinamutinelli@orthodontics.it.

ABSTRACT

Background: Anchorage onto permanent dentition is a common procedure in rapid maxillary expansion. However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment. The purpose of this study was to evaluate the dental effect of rapid maxillary expansion with anchorage exclusively onto deciduous teeth performed in the first period of transition.

Methods: Twenty patients with a lateral cross-bite treated exclusively by a Haas expander in early mixed dentition were retrospectively analyzed before treatment, at appliance removal, and at 21 months out of retention. The sagittal and transverse dimensions, together with the inter-canine arch and irregularity index, were digitally measured on scanned images of dental casts. The patients were compared with three balanced control groups (in total, 60 individuals) matched for gender. Two control groups had the same canine dental class as the treated group at T1, were in the inter-transitional period, and either had or lacked a lateral cross-bite. The last control group was comprised of adolescents in permanent dentition with a dental class I. The statistical analysis was performed by means of repeated-measures ANOVA for paired data and one-way ANOVA, the Kruskal-Wallis test, and the Mann-Whitney test for independent measures (α-level p < 0.05).

Results: At the end of follow-up (inter-transitional period of dentition), the dental arch dimensions of treated patients were similar to those of adolescents with a dental class I and significantly wider than those of patients with a lateral cross-bite. Also, the anterior irregularity index was lower among patients who had undergone expansion treatments than in all untreated study participants.

Conclusions: The Haas expander anchored to the deciduous teeth is effective in increasing the dental arch width in patients with a lateral cross-bite. The dimensions of the dental arch were modified earlier toward the values of the permanent dentition.

No MeSH data available.


Related in: MedlinePlus

Distances drawn on an image of scanned dental cast. C–C′ is inter-canine width, M–M′ is inter-molar width, and I–H is inter-molar depth
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Fig3: Distances drawn on an image of scanned dental cast. C–C′ is inter-canine width, M–M′ is inter-molar width, and I–H is inter-molar depth

Mentions: The mesial and distal points and the tips of the cusps of each tooth and the inter-incisive point were digitally identified. If the central incisors had not erupted, the landmark of the inter-incisive point was marked with respect to the insertion of the frenulum. The measurements for each dental cast were as follows (Fig. 3):Fig. 3


Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding.

Mutinelli S, Manfredi M, Guiducci A, Denotti G, Cozzani M - Prog Orthod (2015)

Distances drawn on an image of scanned dental cast. C–C′ is inter-canine width, M–M′ is inter-molar width, and I–H is inter-molar depth
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495101&req=5

Fig3: Distances drawn on an image of scanned dental cast. C–C′ is inter-canine width, M–M′ is inter-molar width, and I–H is inter-molar depth
Mentions: The mesial and distal points and the tips of the cusps of each tooth and the inter-incisive point were digitally identified. If the central incisors had not erupted, the landmark of the inter-incisive point was marked with respect to the insertion of the frenulum. The measurements for each dental cast were as follows (Fig. 3):Fig. 3

Bottom Line: However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment.The patients were compared with three balanced control groups (in total, 60 individuals) matched for gender.The Haas expander anchored to the deciduous teeth is effective in increasing the dental arch width in patients with a lateral cross-bite.

View Article: PubMed Central - PubMed

Affiliation: Private practice, via Brennero 260/B, 38121, Trento, Italy, sabrinamutinelli@orthodontics.it.

ABSTRACT

Background: Anchorage onto permanent dentition is a common procedure in rapid maxillary expansion. However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment. The purpose of this study was to evaluate the dental effect of rapid maxillary expansion with anchorage exclusively onto deciduous teeth performed in the first period of transition.

Methods: Twenty patients with a lateral cross-bite treated exclusively by a Haas expander in early mixed dentition were retrospectively analyzed before treatment, at appliance removal, and at 21 months out of retention. The sagittal and transverse dimensions, together with the inter-canine arch and irregularity index, were digitally measured on scanned images of dental casts. The patients were compared with three balanced control groups (in total, 60 individuals) matched for gender. Two control groups had the same canine dental class as the treated group at T1, were in the inter-transitional period, and either had or lacked a lateral cross-bite. The last control group was comprised of adolescents in permanent dentition with a dental class I. The statistical analysis was performed by means of repeated-measures ANOVA for paired data and one-way ANOVA, the Kruskal-Wallis test, and the Mann-Whitney test for independent measures (α-level p < 0.05).

Results: At the end of follow-up (inter-transitional period of dentition), the dental arch dimensions of treated patients were similar to those of adolescents with a dental class I and significantly wider than those of patients with a lateral cross-bite. Also, the anterior irregularity index was lower among patients who had undergone expansion treatments than in all untreated study participants.

Conclusions: The Haas expander anchored to the deciduous teeth is effective in increasing the dental arch width in patients with a lateral cross-bite. The dimensions of the dental arch were modified earlier toward the values of the permanent dentition.

No MeSH data available.


Related in: MedlinePlus