Abstract
Evaluation of the effect of a high frequency acceleration device (HFA) on clear aligner exchange intervals and treatment time required to achieve prescribed tooth movements. Sixteen subjects with similar Class I malocclusions, ≤5 mm crowding, and treated with aligner orthodontic therapy (Invisalign) were divided into two groups. Group 1 (experimental; n = 8) underwent aligner treatment in conjunction with daily use of the HFA device and exchanged aligners every five days. Group 2 (controls; n = 8) underwent aligner treatment without use of the device and exchanged aligners every 14 days according to the manufacturer’s recommended interval. All subjects were treated by one investigator, and results—total number of aligners used, and number of refinements required—were evaluated by both prior to final mobile retention (Vivera) scan. A significant decrease in both treatment time and number of aligners required to complete treatment was observed by HFA subjects vs. controls. In addition, no refinements were required by HFA subjects, whereas six of eight control subjects required one or more refinements. The results of the present preliminary report showed that the use of the HFA device in conjunction with aligner orthodontic treatment resulted in a significant decrease in the length of treatment. Moreover, the number of patients requiring refining treatment was significantly lower.
Highlights
Clear aligner therapy has become an increasingly popular orthodontic treatment modality elected by adults and teens alike who seek to avoid traditional fixed braces
The results of the present preliminary report showed that the use of the high frequency acceleration device (HFA) device in conjunction with aligner orthodontic treatment resulted in a significant decrease in the length of treatment
It is hypothesized that HFA will support accelerated aligner exchange (AAE) and subsequent accelerated tooth movement when compared to traditional orthodontic aligner exchange without the use of HFA
Summary
Clear aligner therapy has become an increasingly popular orthodontic treatment modality elected by adults and teens alike who seek to avoid traditional fixed braces. Even under optimal conditions, where aligner design, treatment planning, and patient cooperation is optimal, the progression of treatment may not be completely expressed clinically according to the original sequentially programmed plan for tooth movement This may be due to individual variations in physiological and biological factors that impact bone remodeling, and/or external mechanical factors such as patient failure to properly seat aligners or to identify their accurate tracking. A recent university-based, randomized clinical trial [4] investigating high-frequency mechanical vibration demonstrated both significant accelerated tooth movement and increased cytokine production, a known biological factor in bone remodeling and subsequent orthodontic tooth movement. HFA with bite-wafer mouthpiece design facilitates simultaneous maxillary and mandibular full arch, distortion-free aligner seating This in turn delivers optimal, comprehensive, and continuous forces to the teeth. It is hypothesized that HFA will support accelerated aligner exchange (AAE) and subsequent accelerated tooth movement when compared to traditional orthodontic aligner exchange without the use of HFA
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