J Korean Acad Pediatr Dent.  2019 May;46(2):173-182. 10.5933/JKAPD.2019.46.2.173.

Analysis of Treatment Period on the Intraoral Removable Appliance Utilizing Vertical Facial Growth on Class III Malocclusion

• Song J
• Kim SO
• Song JS
• Lee J
• Choi HJ

• KMID: 2449978
• DOI: http://doi.org/10.5933/JKAPD.2019.46.2.173

Abstract

Vertical facial growth triggers the rotation of mandible to move the chin point to the downward and backward direction, which showed remarkably effective result making the less prominent chin. Recently, the intraoral removable appliance utilizing class III elastic demonstrated the vertical growth trigger mechanism. The treatment change was very fast and wearing was quite easy, compared to extraoral appliances. The purpose of this study was to verify the duration of the treatment on class III malocclusion using intraoral removable appliances, which designed to accelerate vertical facial growth. 56 patients were selected with the complaint of the protruded mandible and class III malocclusion (overjet : −3 - 0 mm, overbite : 0 - 4 mm). Information like; age at start, duration of the treatment events, type of the treatment, overjet, overbite etc. was collected and calculated. The average age of the patients delivering the initial brace was 8.75 ± 1.10 year. Most of the anterior crossbite was resolved within 6 months. The total treatment period was 21.79 ± 10.73 months with the additional procedures like the alignment of anterior teeth and torque control using additional removable and fixed orthodontic appliances. The correlation study showed that patient's cooperation (p = 0.000) and the use of fixed appliance (p = 0.032) were significantly influenced on treatment duration.

Keyword

Treatment of class III; Vertical facial growth; Intraoral removable appliance with class III hook

MeSH Terms

Braces
Chin
Humans
Malocclusion*
Mandible
Orthodontic Appliances
Overbite
Statistics as Topic
Tooth
Torque