ABSTRACT
Objective To introduce a new method to open bite.Methods Compound resin materials were used to make a bonding type deep-bite opening device on the lingual side of anterior teeth in 21 patients.Results 21 patients with deep overbite treatment by this method achieved satisfactory results.Average time in Ⅱ°deep bite pa tients was(3.5 ± 1.4)months,and(5.4 ± 1.2)months in Ⅲ°deep bite patients.Conclusion This device is favorable for rapidly opening deep-bite and is simple and effective.
ABSTRACT
Esthetics is one of the major goals in orthodontic treatment Lingual orthodontics is the only orthodontic technique which is really invisible and permits the patient to have a beautiful smile not only after, but also during treatment and allowing a realistic control of the results.This article reviews the development, advantages and disadvantages, bonding techniques, biomechanics, and treatment procedures of the lingual appliance The aim of this article is to give a broad view of Lingual Orthodontics concepts and treatment in a simplified way, to encourage the orthodontist to use this important treatment modality regularly in their practice.
ABSTRACT
This study was investigated to evaluate the morphologic characteristics of deepbite tendency as multiple factors. The subjects consisted of 60 control subjects(male 25, female 35) and 137 deepbite patients(68 male, 69 female). The deepbite group was composed of 4 subgroups(Class I 44, Class II div. 1 40, Class II div. 2 13, Class III 40). The mean age was 21.57 year for the control group 21 year for deepbite group lateral cephalograph in centric occlusion were taken, traced, and digitized for each subject. The statistically computerized analysis was carried out with SAS program. The results were as follows; 1. In deep bite group, saddle angle is lesser than that of normal group. 2. The vertical dysplasia is prominent on anterior lower face and is closely related with mandibular form and inclination. 3. Without consideration of sagittal relationship, the dental factors such as curve of Spee, interincisal angle, U1 to upper lip length were prominent in the deepbite group. 4. Although there were individual variances in the perioral soft tissue profile, the lip presented more protruded pattern. 5. There was no significant difference in hyoid bone position and inclination between normal and deepbite group. 6. The multivariate discriminant analysis between normal and Class I deepbite group showed that curve of Spee, AB-MP angle, interincisal angle, articular agnle were critical in the determination of deepbite as multiple factors.