Oral health-related quality of life in patients with fixed appliances / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To assess oral health-related quality of life in patients with fixed appliances.</p><p><b>METHODS</b>Orthodontic patients were asked to complete the scale of general conditions (Chinese version, questionnaire 1) and oral health impact profile (OHIP) -14 (Chinese version, questionnaire 2). Baseline data were collected at first visit and thereafter. The subjects finished questionnaire 2 at the 1st week, 4th week, 12th week and 24th week, respectively, after the fixed appliance was bonded. Data were analyzed to evaluate the various sample groups with different personal information and clinical parameters. Results were collated and analyzed using software package SPSS version 15.0.</p><p><b>RESULTS</b>The most common negative effect was physical pain [55/222 (27.8%)] and psychological discomfort [40/222 (18.0%)], mainly in the first month. The total scores at five time points were 3, 10, 7, 5 and 4, respectively. No difference was found in quality of life in patients between sixth month with fixed appliance and without appliance (P > 0.05). Age and education status affected the quality of life (P < 0.001).</p><p><b>CONCLUSIONS</b>Fixed orthodontic appliance therapy affected patients' oral health-related quality of life during treatment. The quality of life in the first month of treatment was mostly compromised and was improved later.</p>

Treatment of maxillary protrusion in adult with self-tapping micro-screw implants / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the position change of upper molars and incisors in order to evaluate the stability of posterior anchorage with the application of micro-screw implant.</p><p><b>METHODS</b>Eight adult patients with severe maxillary protrusion were included. Upper first premolars were extracted and upper posterior anchorage was reinforced with micro-screw implant in all patients. Cephalometric and cast analyses were carried out to record the position change of molar and micro-screw.</p><p><b>RESULTS</b>During treatment the micro-screw implants kept stable in sagittal and vertical plane. Neither the mesial-distal movement nor the tipping of the upper molars during the treatment was statistically significant (P > 0.05). The edge of upper incisors was retracted by 6.86 mm and the tipping was reduced by 18.03 degrees . The center of resistance was intruded by 3.28 mm on average. Significant change was observed (P < 0.01).</p><p><b>CONCLUSIONS</b>Micro-screw implant could provide good anchorage control in the orthodontic treatment.</p>

First molar extraction in patients with crowding: cases analysis / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the outcome of first molar extraction in patients with crowding.</p><p><b>METHODS</b>Totally 22 patients (8 males and 14 females) from Clinic of Orthodontics, SUN Yat-sen University School of Stomatology with crowding were collected. The patients were aged 11 years 3 months to 26 years 8 months (mean age 16 years 6 months). All of them treated with 1 to 4 first molar extractions.</p><p><b>RESULTS</b>The average duration of orthodontic treatment was 18.5 months. Normal overjet and overbite was achieved. Good functional occlusion was established.</p><p><b>CONCLUSIONS</b>Patients with severe crowding could be successfully treated with first molar extraction.</p>