Skeletal Class Ⅲ patients treated with Fränkel function regulator type Ⅲ in the early and late mixed dentition.

Yajing DU; Shiyan Huang; Nanquan Rao; Shuhao XU; Xiaobing LI

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Skeletal Class Ⅲ patients treated with Fränkel function regulator type Ⅲ in the early and late mixed dentition.

Author: Yajing DU ¹ ; Shiyan HUANG ² ; Nanquan RAO ² ; Shuhao XU ² ; Xiaobing LI ²
Author Information

1. Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China(Pressent address: Department of Pediatric Dentistry, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China).
2. Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
Publication Type:Journal Article
MeSH: Cephalometry; Child; Dentition, Mixed; Female; Humans; Male; Malocclusion, Angle Class III; therapy; Orthodontic Appliances, Functional; Overbite; etiology; Time-to-Treatment; Treatment Outcome
From: Chinese Journal of Stomatology 2016;51(5):257-262
CountryChina
Language:Chinese
Abstract:
OBJECTIVETo investigate the outcome of skeletal Class Ⅲ patients treated with Fränkel function regulator type Ⅲ (FR Ⅲ)in the early mixed and late mixed dentition.
METHODSThe samples consisted of 45 mild and moderate skeletal Class Ⅲ patients(26 males, 19 females; meanage, [7.9±1.3] years) treated with FR Ⅲ. According to Hellman's dental developmental stages, these samples were divided into early-treated group(n=24) and late-treated group(n=21). Lateral cephalograms were taken at the beginning and the end of treatment. Twenty-one measurements on hard and soft tissue were included.
RESULTSAfter treatment, SNA, ANB, NA-Apo, Wits, U1-SN, U1-NA, Overjet, UL-EP were significantly increased (1.0±1.9)°, (1.2±1.6)°, (2.6±4.2)°, (1.8±2.7) mm, (4.2±7.6)°, (2.6±7.5)°, (3.6±2.3) mm and (0.8±2.2) mm(P<0.05). OP-SN and IMPA were significantly decreased (1.5±3.7)°and (1.4±4.2)°(P<0.05). There were significant differences in SNA, ANB, UL-EP, IMPA, L1-NB between early-treated group and late-treated group(P<0.05).
CONCLUSIONSFR Ⅲ was suitable for the treatment of mild and moderate skeletal Class Ⅲ patients. The result was better in the early-treated patients than in late-treated ones.