Study on soft tissue changes of angle class Ⅱ division Ⅰ mandibular retraction patients during mixed dental period with MRC functional correction
Journal Title: 口腔疾病防治 - Year 2019, Vol 27, Issue 6
Abstract
Objective To observe the changes of soft tissue in patients with Angle class Ⅱ division Ⅰ malocclusion during mixed dentition treated with MRC functional appliance. Methods Twenty patients with Class Ⅱ division Ⅰ malocclusion of Angle were treated with functional MRC. The facial features before and after treatment were measured by software and the results were analyzed statistically. Results The patients′soft tissue profiles were improved significantly before and after treatment, The OE-Prn-Pos angle, OE-N′-B′ angle, OE-N′-Pos angle, OE-Prn-N′angle, Cm-Sn-UL angle, and N′-Sn-Pos angle increased significantly (P < 0.05). The OE-Sn-UL angle, and Sn-N′-B′ angle decreased significantly (P < 0.05); the distance between the lateral soft tissue line and the middle Sn-H line, UL-E line and LL-E line were significantly different (P < 0.05). The distances were all reduced, and the difference was statistically significant (P < 0.05). Conclusion The application of an MRC functional appliance can improve the relationship among nasolabial soft tissue, upper and lower lip soft tissue, and chin-lip soft tissue, thus improving the protrusion profile of patients.
Authors and Affiliations
HUANG You, YAO Dongping, LU Shijun, PAN Yongchu, WANG Lin
Keywords
Related Articles
- EP ID EP623739
- DOI 10.12016/j.issn.2096-1456.2019.06.007
- Views 202
- Downloads 0
Research progress on the mechanism of radiocaries formation
Radioactive caries is the most common complication of head and neck cancer after radiotherapy. It is a rapidly progressing and widespread destructive disease of tooth tissue after radiotherapy. It is currently believed t...
The management of dental fear symptoms in children in a coparticipation model
Objective To explore the impact of procedural behavior management on children with dental fear (DF) using the interactive mode of coparticipative doctor-patient interactions.Methods Ninety-eight children with dental fear...
White sponge nevus: a case report and literature review
Objective To explore the etiology, clinical manifestation, diagnosis and treatment of white spongy spot nevus, so as to provide reference for clinical diagnosis and treatment. Methods The clinical data and related litera...
Research progress on the CD4 +T cell balance in oral cancer and precancerous diseases
CD4 +T cells play an important role in regulating adaptive immune responses to various inflammatory responses. Parental T cell populations can differentiate in response to different cytokines into at least four subpopula...
Effect of three kinds of medium molecular weight proteins on the corrosion resistance of Ni-Ti and stainless steel arch wires
Objective To explore the influence and mechanism of different types of proteins on the corrosion resistance of alloy to provide a reference for the safe application and surface modification of nickel-titanium (Ni-Ti) and...