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Long-term maxillary changes in patients with skeletal Class II malocclusion treated with slow and rapid palatal expansion.
Am J Orthod Dentofacial Orthop 2008; 134(3):383-8AJ

Abstract

INTRODUCTION

In this study, we evaluated the long-term maxillary changes in skeletal Class II patients who had slow and rapid palatal expansion.

METHODS

The sample consisted of 70 patients divided in 2 groups: 1 group was treated with cervical headgear with expanded inner bow (CHG) and the other with a Haas-type rapid palatal expansion appliance with cervical headgear (RPE-CHG). Data were collected in the molar and canine regions for basal width, alveolar width, and palatal depth at pretreatment (T1), posttreatment (T2), and postretention (T3). The Student paired t test was used to compare data and independent averages between phases.

RESULTS

In both groups, from T1 to T2, there were significant increases in basal width, alveolar width, and palatal depth for the molar region; in the canine region, there was a significant increase only in the alveolar width. From T2 to T3, no significant changes were found for basal and alveolar widths in both groups and regions, but a significant increase was seen in palatal depth in the molar region in the RPE-CHG group.

CONCLUSIONS

Slow and rapid palatal expansion can expand the maxillae and the maxillary teeth in skeletal Class II patients. Rapid palatal expansion was efficient in the treatment of skeletal Class II patients with severe transverse maxillary discrepancy. Skeletal Class II correction with slow and rapid palatal expansion produced long-term stability (10 years after orthodontic treatment).

Authors+Show Affiliations

robertomario@terra.com.brNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Studies
Journal Article

Language

eng

PubMed ID

18774084

Citation

Lima Filho, Roberto M A., and Antonio Carlos de Oliveira Ruellas. "Long-term Maxillary Changes in Patients With Skeletal Class II Malocclusion Treated With Slow and Rapid Palatal Expansion." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 134, no. 3, 2008, pp. 383-8.
Lima Filho RM, de Oliveira Ruellas AC. Long-term maxillary changes in patients with skeletal Class II malocclusion treated with slow and rapid palatal expansion. Am J Orthod Dentofacial Orthop. 2008;134(3):383-8.
Lima Filho, R. M., & de Oliveira Ruellas, A. C. (2008). Long-term maxillary changes in patients with skeletal Class II malocclusion treated with slow and rapid palatal expansion. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 134(3), pp. 383-8. doi:10.1016/j.ajodo.2006.09.071.
Lima Filho RM, de Oliveira Ruellas AC. Long-term Maxillary Changes in Patients With Skeletal Class II Malocclusion Treated With Slow and Rapid Palatal Expansion. Am J Orthod Dentofacial Orthop. 2008;134(3):383-8. PubMed PMID: 18774084.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term maxillary changes in patients with skeletal Class II malocclusion treated with slow and rapid palatal expansion. AU - Lima Filho,Roberto M A, AU - de Oliveira Ruellas,Antonio Carlos, PY - 2006/07/01/received PY - 2006/09/01/revised PY - 2006/09/01/accepted PY - 2008/9/9/pubmed PY - 2008/9/24/medline PY - 2008/9/9/entrez SP - 383 EP - 8 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 134 IS - 3 N2 - INTRODUCTION: In this study, we evaluated the long-term maxillary changes in skeletal Class II patients who had slow and rapid palatal expansion. METHODS: The sample consisted of 70 patients divided in 2 groups: 1 group was treated with cervical headgear with expanded inner bow (CHG) and the other with a Haas-type rapid palatal expansion appliance with cervical headgear (RPE-CHG). Data were collected in the molar and canine regions for basal width, alveolar width, and palatal depth at pretreatment (T1), posttreatment (T2), and postretention (T3). The Student paired t test was used to compare data and independent averages between phases. RESULTS: In both groups, from T1 to T2, there were significant increases in basal width, alveolar width, and palatal depth for the molar region; in the canine region, there was a significant increase only in the alveolar width. From T2 to T3, no significant changes were found for basal and alveolar widths in both groups and regions, but a significant increase was seen in palatal depth in the molar region in the RPE-CHG group. CONCLUSIONS: Slow and rapid palatal expansion can expand the maxillae and the maxillary teeth in skeletal Class II patients. Rapid palatal expansion was efficient in the treatment of skeletal Class II patients with severe transverse maxillary discrepancy. Skeletal Class II correction with slow and rapid palatal expansion produced long-term stability (10 years after orthodontic treatment). SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/18774084/Long_term_maxillary_changes_in_patients_with_skeletal_Class_II_malocclusion_treated_with_slow_and_rapid_palatal_expansion_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(08)00465-4 DB - PRIME DP - Unbound Medicine ER -