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Long-term stability of combined rapid palatal expansion–lip bumper therapy followed by full fixed appliances
- Source :
- American Journal of Orthodontics and Dentofacial Orthopedics. 128:310-325
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- The purpose of this study was to evaluate the long-term postretention stability of rapid palatal expansion-lip bumper therapy followed by full fixed appliances.The sample included 20 treated patients (11 women and 9 men) who were recalled to obtain postretention records. The subjects were out of retention for a minimum of 4 years and an average of 7.9 years. They had begun treatment in the late mixed dentition at a mean age of 11.1 with considerable incisor crowding but, on average, no tooth size-arch length discrepancies. Pretreatment, posttreatment (mean age, 13.6 years), and postretention (mean age, 24.3 years) models were digitized, and the computed measurements were compared with untreated reference data.The majority of treatment increases in maxillary and mandibular arch dimensions were statistically significant (P.05) and greater than expected for untreated controls. Although many measurements decreased postretention, net gains were maintained for 21 of the 30 measurements evaluated. The notable exception was arch perimeter, which decreased to less than pretreatment values. Postretention incisor irregularity increased 0.5 +/- 1.2 mm in the maxillary arch and 1.1 +/- 1.5 mm in the mandibular arch.Based on the good long-term stability observed in this study, we concluded that use of rapid palatal expansion-lip bumper expansion therapy in the late mixed dentition followed by full fixed appliances is an effective form of treatment for patients with up to moderate tooth size-arch length discrepancies.
- Subjects :
- Male
Palatal Expansion Technique
Treatment outcome
Dentistry
Orthodontics
Mandible
Dental Arch
Orthodontic Appliances
Incisor
Late mixed dentition
Recurrence
Extraoral Traction Appliances
Humans
Odontometry
Medicine
Child
Retrospective Studies
business.industry
Reproducibility of Results
Mean age
Lip
Mandibular arch
Treatment Outcome
medicine.anatomical_structure
Female
business
Orthodontic Retainers
Malocclusion
Subjects
Details
- ISSN :
- 08895406
- Volume :
- 128
- Database :
- OpenAIRE
- Journal :
- American Journal of Orthodontics and Dentofacial Orthopedics
- Accession number :
- edsair.doi.dedup.....04ab6198674ef373d832553de8461f46