In recent years, the early orthodontic treatment of malocclusion has become a hot issue in the field of orthodontics. Some new phenomena and new problems that have emerged require in-depth analysis and discussion, and need to be given correct guidance and norms. Malocclusion refers to the deformities of teeth, jaws, and craniofacial bones caused by genetic and environmental factors during growth and development. Based on the accurate judgment of the etiology and diagnosis, choosing the right time and suitable indications, with the advantage of growth and development, the most suitable appliance can be selected in the early stage of malocclusion to fix malocclusion, and to effectively prevent and block the formation and development of malocclusion. This article will discuss how to timely and appropriately carry out the early prevention and treatment of malocclusion with six aspects, including methods of performing early orthodontic treatment, the basis and guarantee of early orthodontic treatment, correctly understanding early orthodontic treatment, the issues that should be paid attention to in carrying out early orthodontic treatment, actively advocating multidisciplinary cooperation during early orthodontic treatment and understanding face management in a serious way.
Dental Care ; Humans ; Malocclusion/therapy* ; Malocclusion, Angle Class II/therapy* ; Orthodontic Appliances, Functional ; Orthodontics, Corrective/methods*

ABSTRACT Anterior crossbites would normally require early intervention, especially when associated with mandibular displacements. The intervention would usually commence in children around the age of eight and nine, where treatment could be a challenge at this age. Therefore, a simple and quick treatment to this malocclusion would be desirable. This case series illustrates two cases of anterior crossbite with a functional shift that were successfully corrected using a simplified fixed technique, which involved a short-span nickel-titanium (Ni-Ti) aligning round archwire, composite resin and glass ionomer cement (GIC).
Malocclusion ; Orthodontics, Corrective--methods

Adult ; Humans ; Malocclusion, Angle Class III ; therapy ; Orthodontics ; Orthodontics, Corrective ; methods ; Preoperative Care ; methods

OBJECTIVETo introduce algorithms for effective segmentation of teeth MRI-UTE image.

METHODSTo construct second-segmentation algorithm process based on layer-dependent multi-constrained method. Firstly, a level set method was used to segment the initial boundary from the region determined by user in the reference slice. Secondly, both crown and root of the tooth were segmented by the improved level set method which took the information of the former layer's result as constraint conditions. Finally, the improved level set based on the information of the former and later layer's results was executed for the second time to improve the accuracy of segmentation, in which, the parameter of the overlapping ratio was considered.

RESULTSThe accuracy was 86.98% for the first-segmentation and was increased to 88.35% for the second-segmentation. Compared to the two other methods, the accuracy of the algorithms provided was improved significantly (P < 0.05).

CONCLUSIONSThe proposed algorithms can effectively achieve the segmentation of teeth MRI-UTE image and has a great improvement on accuracy.

Algorithms ; Humans ; Image Enhancement ; Magnetic Resonance Imaging ; methods ; Orthodontics, Corrective ; methods ; Tooth ; anatomy & histology

Computer Simulation ; Computer-Aided Design ; Humans ; Imaging, Three-Dimensional ; Maxillofacial Abnormalities ; surgery ; Orthodontics, Corrective ; methods ; Reconstructive Surgical Procedures ; methods ; Robotics ; methods ; Surgery, Computer-Assisted ; methods ; Tooth Abnormalities ; surgery

OBJECTIVETo investigate the soft and hard tissue changes in Class II division 1 patients treated with Tip-Edge plus technique.

METHODSSixteen Class II division 1 patients (7 boys and 9 girls) with mandibular retrusion in permanent dentition were selected and treated with Tip-Edge plus appliance. Lateral cephalometric films were analyzed before and after treatment. The effects were evaluated with Holdaway soft tissues analysis and routine cephalometric analysis methods. The arithmetic mean and standard deviation were calculated for each variable. Paired t-test was performed.

RESULTSThe average treatment time was 16 months. Normal overjet and overbite were established with retroclination of upper incisors and proclination of lower incisors. U1-NA(°) and U1-NA (mm) decreaed by (15.40 ± 5.31)° and (4.16 ± 1.82) mm (P < 0.01). NLA showed an average increase of (-16.60 ± 5.29)° (P < 0.01). Remarkable soft tissue change was noted after the treatment.

CONCLUSIONSThe profile in Class II division 1 patients could be quickly and efficiently improved after treatment with Tip-Edge plus technique.

Adolescent ; Cephalometry ; Child ; Esthetics, Dental ; Female ; Humans ; Male ; Malocclusion, Angle Class II ; diagnostic imaging ; therapy ; Orthodontic Wires ; Orthodontics, Corrective ; instrumentation ; methods ; Radiography, Panoramic

China ; Cone-Beam Computed Tomography ; Dental Stress Analysis ; Humans ; Imaging, Three-Dimensional ; Malocclusion ; diagnosis ; etiology ; therapy ; Orthodontics ; manpower ; trends ; Orthodontics, Corrective ; methods

To validate the use of the Index of Complexity, Outcome and Need (ICON) in assessing orthodontic treatment need among 12-13 year-olds in southern China, we determined the threshold value of ICON based on Chinese orthodontists' judgments. The samples consisted of 335 students in grade 7 from 16 randomly selected middle schools in Chengdu, China. Three associate professors provided ICON scores for each participant and the results were compared with the gold standard judgments from 25 experts on treatment needs. Based on the gold standard, 195 casts belonged to the treatment category, while the rest 140 belonged to the no-treatment category. With the international cutoff point of 43, the sensitivity and specificity of the ICON score were 0.29 and 0.98.The best compromise between sensitivity and specificity in Chengdu, compared with the gold standard, was found at a cutoff point of 29, and the sensitivity and specificity were 0.88 and 0.83. When used to evaluate the treatment need of 12-13 year-olds in southern China, the international ICON cutoff value did not correspond well with Chinese orthodontists' judgments; a lower cutoff value of 29 offered a greater sensitivity and specificity with respect to expert orthodontists' perception of treatment need.
Adolescent ; Child ; China ; epidemiology ; Cross-Cultural Comparison ; Data Collection ; Dental Health Surveys ; methods ; standards ; Female ; Health Services Needs and Demand ; statistics & numerical data ; Humans ; Male ; Malocclusion ; diagnosis ; epidemiology ; Needs Assessment ; statistics & numerical data ; Observer Variation ; Orthodontics, Corrective ; standards ; statistics & numerical data ; Reference Values ; Reproducibility of Results ; Sensitivity and Specificity

Arthritis, Juvenile ; diagnosis ; therapy ; Humans ; Magnetic Resonance Imaging ; Orthodontics, Corrective ; methods ; Temporomandibular Joint Disc ; diagnostic imaging ; Temporomandibular Joint Disorders ; diagnosis ; diagnostic imaging ; therapy ; Tomography, X-Ray Computed

Fingersucking ; adverse effects ; Humans ; Malocclusion ; etiology ; therapy ; Malocclusion, Angle Class II ; therapy ; Malocclusion, Angle Class III ; therapy ; Orthodontic Brackets ; Orthodontics, Corrective ; methods ; Orthodontics, Interceptive ; methods ; Palatal Expansion Technique ; Time Factors ; Tongue Habits ; adverse effects ; Tooth Extraction ; Tooth, Impacted ; surgery