Clinical characteristics and comprehensive treatment of patients with cleidocranial dysplasia / 中华口腔医学杂志

Objective: To summarize the clinical characteristics of patients with cleidocranial dysplasia (CCD) and analyze their treatment methods. Methods: From January 2000 to December 2020, patients with CCD who completed comprehensive treatment in the Department of Orthodontics and the First Dental Clinic, School and Hospital of Stomatology, China Medical University were retrospectively analyzed. A total of 14 CCD patients [7 males and 7 females, aged (16.1±4.5) years] were collected. There were 153 impacted permanent teeth in this study. In addition to the teeth that needed to be extracted due to special conditions, 147 impacted teeth were pulled into the dentition using closed traction. Patients were divided into adolescent group (≥12 years and<18 years, 10 patients) and adult group (≥18 years, 4 patients). Failure rate of traction was compared between the two groups. Factors affecting the success rate of closed traction such as vertical position of teeth (high, middle and low) and horizontal position of the teeth (palatal, median and buccal) were analyzed. Results: The incidence of maxillary impacted teeth [69.3% (97/140)] was higher than that of mandibular impacted teeth [40% (56/140)]. The difference was statistically significant (χ2=24.22, P<0.001). The supernumerary teeth were mainly located in the premolar area 61.4% (21/44), and most of them were in the palatal region of the permanent teeth 95.5% (42/44). They were generally located at the same height or the occlusal side of the corresponding permanent teeth. The success rate of closed traction was 93.9% (138/147). The success rate in the adolescent group [98.2% (108/110)] was higher than that in the adult group [81.1% (30/37)], and the difference was significant (χ2=14.09, P<0.05). Failure after closed traction of 9 teeth was found totally, including 7 second premolars. The success rate of traction in impacted second premolars at different vertical (χ2=11.44, P<0.05) and horizontal (χ2=9.71, P<0.05) positions in alveolar bone was different significantlly. The success rates of the second premolars were high (15/16), middle (12/13), low (2/7), and lingual palatine (10/17), median (19/19), lip-buccal (0/0), respectively. Conclusions: The closed traction of impacted teeth in patients with CCD was effective, and the age was the main variable affecting the outcome. The success rate of traction in impacted second premolars located in low position vertically or in palatal position was low, which required close observation during treatment.

Correlation between social psychology and personality characteristics and treatment options for adult patients with skeletal malocclusion / 华西口腔医学杂志

OBJECTIVE@#This study aims to explore factors affecting the dental aesthetic social psychology of patients with skeletal malocclusion and to measure the relationship between the objective orthodontic requirements and the subjective treatment requirements of patients. This work provides a reference for doctors to measure patients' orthodontic treatment needs.@*METHODS@#Adult patients with skeletal malocclusion were chosen as the research object. Questionnaire survey was used to analyze factors influencing the psychosocial impact of dental aesthetics questionnaire (PIDAQ), index of orthodontic treatment need (IOTN), and Eysenck personality questionnaire-revised short scale for Chinese (EPQ-RSC). The relationship among PIDAQ, IOTN, EPQ-RSC, and treatment options was also evaluated.@*RESULTS@#Seventy-two valid questionnaires were collected from adult patients with skeletal malocclusion. 1) The PIDAQ scores significantly differed among different occupations (P0.05). People with low educational level were more likely to receive surgery if their psychosocial impacts of dental aes-thetics were serious. 5) The score of psychoticism scale of EPQ-RSC and the educa-tional level had a mutual influence on the PIDAQ score (P<0.01). Moreover, the neuroticism scale and AC self-assessment scores had a mutual influence on the PIDAQ score (P<0.05). However, this study did not find a correlation between personality traits and treatment options.@*CONCLUSIONS@#Many factors, such as personal natural conditions, subjective aesthetic evaluation of teeth, and psychosocial impacts of dental aesthetics, affect patients' treatment options. Personality characteristics can play a certain role in dental aesthetics social psychology.

Effect of rapamycin combined with cisplatin on head and neck squamous cancer cells regulated by CCL19 / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the synergistic effects of rapamycin and cisplatin on head and neck squamous cancer cells regulated by chemokine (C-C motif) ligand 19 (CCL19).</p><p><b>METHODS</b>The role of rapamycin and cisplatin was detected on cell-cycle and apoptosis in CCL19 induced PCI-4B and PCI-37B cells by methyl thiazolyl tetrazolium (MTT) and flow cytometry (FCM). Dose-effect relationship parameters and combination index (CI) were calculated on the median-effect equation and multiple drug effect equation using computer software CalcuSyn. Statistical analysis was performed by the unpaired student's t-test.</p><p><b>RESULTS</b>Rapamycin and cisplatin could respectively increase the growth arrest, the proportion of G(1) phase and apoptosis of CCL19 induced cancer cells (P < 0.05). Under inhibitory concentration 50% (IC(50)), CI was less than 1, and in IC(75), it was more than 1 in PCI-4B cells. In PCI-37B cells, under IC(75), CI was less than 1, and in IC(90), it was more than 1.</p><p><b>CONCLUSIONS</b>Rapamycin and cisplatin can inhibit CCL19-regulated PCI-4B and PCI-37B cells' survival. The two drugs have synergistic effects when used in combination.</p>

Effect of chemokine receptor 7 small interfering RNA on proliferation and invasion of squamous cell carcinoma of head and neck / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To study the effect of chemokine receptor 7 (CCR-7) small interfering RNA (siRNA) on proliferation and invasion of squamous cell carcinoma of head and neck (SCCHN).</p><p><b>METHODS</b>CCR-7 siRNA was co-transfected into SCCHN cell line PCI-4B using Lipofectamine 2000. CCR-7 protein level was detected by western blotting. SCCHN cell proliferation was detected by MTT, and the change of actin cytoskeleton observed by confocal laser scanning microscope. Transwell assays were used to determine chemotaxis and invasion of SCCHN cells. The activity and nuclear translocation of nuclear factor-kappa B (NF-kappa B) were detected by TransAM NF-kappa B p65 kit and fluorescence microscope respectively.</p><p><b>RESULTS</b>After CCR-7 siRNA transfection, the protein level of CCR-7 was significantly decreased. The changes induced by CCL-19, including increased proliferation rate, polarized actin polymerization, increased chemotaxis rate and invasion rate, were all abolished by CCR-7 siRNA transfection. CCR-7 siRNA also diminished CCL-19-induced NF-kappaB activation and nuclear translocation.</p><p><b>CONCLUSIONS</b>CCR-7 siRNA could inhibit expression of CCR-7 and diminish the increased proliferation and invasion of SCCHN induced by CCL-19 in vitro. CCR-7 siRNA may provide a potential treatment strategy for SCCHN.</p>

Changes of interlukin-1beta and tumor necrosis factor-alpha levels in gingival crevicular fluid during orthodontic tooth movement / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the dynamic changes of interlukin-1beta (IL-1beta) and tumor necrosis factor-alpha (TNF-alpha) in gingival crevicular fluid (GCF) during orthodontic tooth movement, and to discuss the biological significance.</p><p><b>METHODS</b>Fifteen patients were chosen as subjects. For each patient, upper and lower canines at one side having one treatment for distal movement by elastic chain served as the experimental teeth, whereas the contralateral ones were used as controls. The GCF were taken before activation and at 1, 24, 48, 72, 168 hours respectively after initiation of the experiment. The levels of IL-1beta and TNF-alpha in GCF were determined by radioimmunoassay.</p><p><b>RESULTS</b>The levels of IL-1beta and TNF-alpha in experimental group began to increase at 24 hours and reached to its peak value at 72 hours after initiation of the experiment, but their levels returned to baseline at 168 hours. Both of them, however, remained at the baseline level in control group. The changes of the two cytokines level were found statistically significant at 48 and 72 hours (P<0.05) between experimental and control group. No statistically significant were observed before activation and at 1, 168 hours after application of orthodontic forces (P>0.05) between experimental and control group.</p><p><b>CONCLUSION</b>The levels of IL-1beta and TNF-alpha in gingival crevicular fluid experience dynamic changes during the early phase of orthodontic treatment, indicate that they might play an important role in the process of alveolar regeneration and tooth movement.</p>