Treatment effects of a twin-force bite corrector versus an activator in comparison with an untreated Class II sample: a preliminary report.

Abstract

OBJECTIVES:

The present study aimed to compare the treatment outcomes of a fixed-functional appliance (Twin-Force Bite Corrector - TFBC) and a conventional removable functional appliance (Activator) in the treatment of skeletal Class II malocclusions.

METHODS:

The TFBC and Activator Groups each included 10 young adults possessing a skeletal Class II malocclusion, and the treatment outcomes of both groups were quantified and compared, using lateral cephalometric radiographs, with an untreated skeletal Class II Control Group.

RESULTS:

A skeletal Class I relationship and a marked reduction in overjet were achieved in both treatment groups; however, the duration of treatment was significantly shorter in the TFBC Group (0.45 years) when compared with the Activator Group (1.37 years) (p < 0.001). Effective length and sagittal positioning of the mandible underwent significant changes in the TFBC and Activator Groups. Vertical facial dimensions increased in each group; however, these increases were significantly greater in the Activator Group when compared to the TFBC and Control Groups (p < 0.05). Dentoalveolar changes also contributed to the reduction in overjet.

CONCLUSIONS:

Although both appliances succeeded in eliminating the Class II relationship and improving the overjet and overbite, the short treatment time in the TFBC Group raises questions regarding the long-term stability of the results.

• Authors: Oyku Dalci, Ayse Tuba Altug, Ufuk Toygar Memikoglu
• Journal: Australian orthodontic journal (Aust Orthod J) Vol. 30 Issue 1 Pg. 45-53 (May 2014) ISSN: 0587-3908 [Print] Australia
• PMID: 24968645 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)

Topics

• Activator Appliances
• Adolescent
• Cephalometry (methods)
• Child
• Female
• Humans
• Male
• Malocclusion, Angle Class II (therapy)
• Orthodontic Appliance Design
• Orthodontic Appliances, Functional
• Orthodontic Appliances, Removable
• Overbite (therapy)
• Retrognathia (therapy)
• Time Factors
• Treatment Outcome
• Vertical Dimension