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To compare apical root resorption of maxillary incisors between adolescents and adults after orthodontic treatment.
Patients receiving orthodontic treatment in Affiliated Hospital of Chifeng University from May 2014 to August 2016 were enrolled, and divided into two age groups adolescent group (32) and adult group (36). The included subjects received orthodontic fixed appliance treatment with straight-wire technique combined with Hawley type retainer for one year. After treatment, all patients were followed up for one year. Then the apical root resorption of maxillary incisors was evaluated by cone-beam CT (CBCT) at 4 time points, including pre-treatment (T1), end of treatment (T2), 6 months after treatment (T3), and 12 months after treatment (T4). Data were processed by SPSS 20.0 software package.
The external root volume of maxillary central incisor, lateral incisors, mandibular central incisors and mandibular lateral incisors of both sides at T2-T4 was significantly lower than that at T1(P<0.05). SR59230A chemical structure There was partial increase in root volume of both groups at T3 and T4, while no significant difference from that at T2 (P>0.05). △root volume T3-T2 and △root volume T4-T3 had no significant difference between the two groups (P>0.05). △root volume T3-T2 in the adolescent group was significantly smaller than that in the adult group (P<0.05). Correlation analysis showed that the △root volumeT1-T2 was significantly positively correlated with age (P<0.05), meanwhile △root volume T3-T2 and △root volume T4-T3 were negatively correlated with age (P<0.05).
Age is an important factor affecting the volume of root after orthodontic treatment. Adolescent patients with Class II division 1 malocclusion have a strong ability of self-healing after orthodontic treatment.
Age is an important factor affecting the volume of root after orthodontic treatment. Adolescent patients with Class II division 1 malocclusion have a strong ability of self-healing after orthodontic treatment.PURPOSE：This study was aimed to investigate the effect of malocclusion on self-esteem of children aging 8 to 10 years in Chongqing. METHODS：According to the standards of the Fourth National Oral Health Epidemiological sampling survey，a multistage, stratified, cluster, and random sampling method was used to select 1 588 children from 12 schools in 3 districts and 3 counties in Chongqing. The part of tooth health of the Index of Orthodontic Treatment Need (IOTN) was used to evaluate malocclusion. The aesthetic part of the IOTN was used to evaluate the subjective orthodontic treatment need. The Harter's Self-perception Profile for Children was used to evaluate the self-esteem. The data were analyzed with SPSS 20.0 software package. RESULTS Subjective orthodontic treatment need IOTN-AC(moderate severe), overjet (severe 6-9 mm, >9 mm), anterior crossbite, open bite, caries located in the anterior tooth area were negatively correlated with self-esteem(P less then 0.05). CONCLUSIONS： Subjective orthodontic treatment need and malocclusion, especially the types that have great influence on beauty obviously affect children's self-esteem. It is necessary to increase the investment and education of early orthodontic intervention.
To investigate the difference of parent's cognition of children's space loss and its influencing factors, to provide reference for children's oral health education, in order to reduce the incidence of malocclusion.
A self-designed questionnaire was used to investigate the basic information and related problems of 36 parents whose children received space loss treatment. SPSS 22.0 software package was used for statistical analysis.
Parents paid more attention to the common oral problems of their children, the awareness of oral prevention and health care were weak, the attention to treatment was higher than that of prevention. The attitude of parents to the cognition and targeted treatment of malocclusion caused by space loss was low(27.78%), which was significantly different from that of caries (75.00%) and premature loss of deciduous teeth (63.89%). The total cognition of space loss was 61.11%. The cognitive degree of parents with different characteristics was different the cognitive degree of parents ovngthen the propaganda, coverage and depth of oral health education care, strengthen the awareness of oral preventive health care, especially for the parents with special personality on the importance of space loss, to prevent primary teeth caries and premature loss of primary teeth, avoid the loss of dental space, make the complete primary dentition to form a normal permanent dentition.
It is necessary to strengthen the propaganda, coverage and depth of oral health education care, strengthen the awareness of oral preventive health care, especially for the parents with special personality on the importance of space loss, to prevent primary teeth caries and premature loss of primary teeth, avoid the loss of dental space, make the complete primary dentition to form a normal permanent dentition.
To investigate the difference of forward head posture between patients with temporomandibular disorders(TMD) and healthy people.
Ninety-one TMD patients (18 males and 73 females) were recruited from the Department of Rehabilitation; Meanwhile, eighty-three healthy participants（20 males and 63 females）were recruited. A digital camera was used to capture images of the sagittal plane of the head and neck and upper thorax. The craniovertebral angle between the horizontal line passing through C7 and a line extending from the tragus of the ear to C7 was recorded. The difference of craniovertebral angle between TMD patients and healthy people of different genders were analyzed with SPSS 20.0 software package.
In both male and female groups，the craniovertebral angle of TMD patients was significantly smaller than that of healthy people（P<0.01）.
Compared with healthy people, TMD patients present more forward head with abnormal head and neck posture.
Compared with healthy people, TMD patients present more forward head with abnormal head and neck posture.
