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28 August 2021, Volume 37 Issue 8 Previous Issue    Next Issue

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pIgR/sIgA and Oral Diseases LIU Jianguo, ZHAO Yujie 2021, 37(8): 677-681.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.001 Abstract ( 234 )   PDF (1395KB) ( 416 )   The mucosal immune system is the first line of defense against all kinds of antigens. The oral cavity is protected by the mucosal immune system. The sIgA in saliva is essential to protect the transmission of oral mucosal pathogens and maintain the homeostasis of oral mucosal surface. As a special transporter protein, polymer immunoglobulin receptor (pIgR) is a key participant in the formation and secretion of sIgA. In oral mucosal immunity, pIgR plays an important role in the defense of oral bacteria. Reducing the expression of pIgR in submandibular gland will inhibit the secretion of sIgA into saliva, and lower levels of sIgA in saliva make it easier for bacteria to enter the epithelial surface, leading to a variety of diseases. This article reviews the function of pIgR/sIgA in oral diseases and its immune regulation mechanism, in order to provide more research ideas for the study of pIgR/sIgA in oral microenvironment. References | Related Articles | Metrics

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Application Prospect of Green Synthesis Method of Silver Nanoparticles in Dental Materials DING Yashuang, MENG Xiangfeng 2021, 37(8): 682-684.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.002 Abstract ( 245 )   PDF (813KB) ( 350 )   Silver nanoparticles with a large specific surface area, lively properties, and good biological activity have great application prospect in dental materials to some extent. But how to combine the synthesis method of silver nanoparticles with the antibacterial modification of dental materials is an issue worthy studying. Green synthesis method of silver nanoparticles has been widely studied because of its safety,environmental protection, easily operation, large-scale synthesis, and free of toxic substances. This review intends to summarize the application prospect of green synthesis method of silver nanoparticles in dental materials, in order to provide new idea for the antibacterial modification of dental materials. References | Related Articles | Metrics

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A Review of Enamel Demineralization in Orthodontic Treatment with Fixed Appliances LI Shuang, HU Min 2021, 37(8): 685-688.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.003 Abstract ( 304 )   PDF (807KB) ( 578 )   Enamel demineralization is one of the most common complications in the orthodontic treatment with fixed appliances, demonstrated as the chalk-colored opaque spots or plaques on the surface of the teeth. It obviously reduces the aesthetics and enamel health of teeth. Some serious cases even require the removal of appliances. Because of the high morbidity and being short of effective clinical approaches, we have to face the challenge of prevention and treatment of enamel demineralization. To improve our understanding and hunting for the potential therapies, this paper is aiming to review the progress of enamel demineralization during the orthodontic treatment. References | Related Articles | Metrics

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Role of Nuclear Factor I-C in Tooth Root Development LIU Xin, XIE Xiaohua 2021, 37(8): 689-692.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.004 Abstract ( 166 )   PDF (847KB) ( 148 )   Tooth root development is a complex process, which is jointly controlled by epithelium and mesenchyme and involves the interaction of multiple molecules. The study found that nuclear transcription factor I-C (NFIC) is one of the main molecules that regulate tooth root development. NFIC is involved in the formation of root dentin and root growth through interaction with various molecules including transforming growth factor β (TGF β), KrÜppel-like factor 4 (KLF4), osterix (OSX), hedgehog (HH), AFF4, and trace element zinc. This article will review the role of NFIC in tooth root formation and the molecules related to NFIC. References | Related Articles | Metrics

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New Progress in the Treatment of Adenoid and Tonsil Hypertrophy in Children ZHAO Jiaqi, SHAN Lihua 2021, 37(8): 693-695.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.005 Abstract ( 329 )   PDF (787KB) ( 665 )   Chronic upper airway obstruction or dysfunction in children can cause open mouth breathing, produce adenoid face, and in severe cases lead to obstructive sleep apnea hypopnea syndrome (OASHS), which can seriously affect the children's growth, development, and cognition. Adenoid and tonsil hypertrophy are the main cause of upper airway obstruction in children. This paper discusses the effects of upper airway obstruction on maxillofacial and systemic growth in children, the selection of different treatment methods, and the latest research progress. Children with upper airway obstruction require multidisciplinary cooperative sequential therapy. References | Related Articles | Metrics

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Effects of Upper Curvature of Lower Lip on Smile Arc Esthetics DING Hong, WANG Wei, XU Hong, XIU Xia, JIANG Chunmiao 2021, 37(8): 696-701.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.006 Abstract ( 182 )   PDF (2593KB) ( 364 )   Objective: To study the proportion of patients with different upper curvatures of lower lip at the end of orthodontic treatment and the effect of different curvatures of smile arc on the smile esthetics in patients with V-shaped or trapezoidal upper curvature of lower lip. Methods: 300 patients were included in this study, and the distribution of different upper curvatures of lower lip was calculated. Different vertical distances between the central incisor and lateral incisor and different upper curvatures of lower lip were combined and compared by orthodontists, prosthodontists, and laypersons. Results: The proportion of patients with round, V-shaped, and trapezoidal upper curvature of lower lip was 54.7%, 23.3%, and 23.0%. For patients with V-shaped upper curvature of lower lip, the evaluators chose smile arc with 2mm vertical distance of the incisor edge between central and lateral incisors, while for the patients with trapezoidal upper curvature of lower lip, smile arc with flat curvature was chosen. Conclusion: The influence of upper curvature of lower lip on the smile arc esthetics should be fully considered when orthodontists make the treatment plan. For the patients with V-shaped upper curvature of lower lip, it should be cautious to intrude the maxillary anterior teeth, while for the patients with trapezoidal upper curvature, flat smile arc is recommended. References | Related Articles | Metrics

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Agreement Evaluation of Cephalometric Analysis between Smartphone Application and Computer Software LIU Henglang, FENG Linjing, WANG Lili 2021, 37(8): 702-707.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.007 Abstract ( 184 )   PDF (1548KB) ( 253 )   Objective: To investigate the accuracy of cephalometric measurements performed by smartphone application (App). Methods: Both computer software and smartphone app were used to trace total twelve measurements of 55 patients' lateral cephalograms. The intra-class correlation coefficient (ICC) was used to assess the intra-tool reliability. Statistic differences between two methods were evaluated using the paired t-test. The agreement of these two methods was evaluated by the 95% confidence interval (CI) of 95% limits of agreement (LoA), which was calculated by the Bland-Altman method. Results: All ICC values from repeated measurements by each method were above 0.9. There was no significant statistically difference between two methods in all cephalometric measurements (P>0.05). The 95% CI of 95% LoA of SNA, SNB, ANB, SN-MP, Y-Axis, U1-NA (mm), L1-NB (mm), UL-E line, and LL-E line were within clinically acceptable limits, except for U1-NA, L1-NB, and U1-L1. Conclusion: Smartphone app showed good agreement with computer software in skeletal and soft tissue measurements of cephalometric analysis. It was recommended to use Smartphone app in cephalometric analysis for its portable, accurate, and reliable property. References | Related Articles | Metrics

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Clinical Study on Effect of Soft Tissue Graft on Gingival Recession after Orthodontic Treatment LIU Dongxiao, XIA Liansong, HUANG Chuan 2021, 37(8): 708-711.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.008 Abstract ( 181 )   PDF (2036KB) ( 443 )   Objective: To evaluate the clinical outcomes of treatment of gingival recession after orthodontic treatment with soft tissue graft. Methods: Twelve patients with gingival recession after orthodontic treatment were treated with coronal advanced flap combined with connective tissue graft (CAF+CTG) or free gingival graft (FGG). Recession depth (RD), keratinized tissue width (KTW), pocket depth (PD), and root coverage rate (RC) at baseline and follow-up-one-year after treatment were recorded and analyzed. The satisfaction degree of patients was evaluated by visual analogue scale (VAS). Results: The mean RDs and KTWs at baseline and follow-up were (3.7±0.9) mm, (0.8±0.3) mm, (0.3±0.9) mm, and (3.8±0.6) mm, respectively. The mean RC at follow-up was (97.1±6.3)%. PD was decreased from (1.5±0.5) mm to (1.2±0.5) mm. The VAS value was 9.6±0.6 at one-year-follow-up. Root sensitivity was significantly improved. Conclusion: The coronal advanced flap combined with connective tissue graft (CAF+CTG) or free gingival graft (FGG) has ideal clinical outcomes and satisfaction for the treatment of gingival recession after orthodontic treatment. References | Related Articles | Metrics

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In Vitro Study of Modified Flowable Resin for Orthodontics QUAN Lulu, LI Xuewei, ZHAO Junjie, DENG Wenzhen, ZHANG Xu, DONG Wei, LIANG Yongqiang 2021, 37(8): 712-716.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.009 Abstract ( 171 )   PDF (2111KB) ( 421 )   Objective: To evaluate the antibacterial activity and bond strength of flowing resin containing dimethylaminohexadecy methacrylate (DMAHDM). Methods: A modified orthodontic adhesive was prepared by adding 0% (control), 3%, 5%, and 7.5% (w/w) DMAHDM to 3M Z350XT flowable resin, recorded as group A, group B, group C, and group D. Enamel shear bond strength (SBS) was tested. The MTT method was used to detect the activity of the Streptococcus mutans biofilm. And bacterial adhesion was observed by scanning electron microscope. Data were analyzed with ANOVA and LSD-t statistical significance was set at the 0.05 probability level. Results: Group A showed no significant differences in the SBS compared with group B (P=0.600). However, the SBS values of group C and group D significantly decreased (P<0.05), although they could meet the orthodontic bonding requirements. The difference between DMAHDM weight concentration gradients was statistically significant (P=0.000), and group D had the best antibacterial effect. Conclusion: Mixing 7.5% DMAHDM into flowable resin improved the antibacterial properties and meet the orthodontic adhesive requirement. References | Related Articles | Metrics

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Efficiency of New Nickel-titanium Instruments in Removing Filling Materials from Oval-shaped and Differently Curved Root Canals WANG Jing, FAN Liyao, WANG Tao, LI Yunyun, SUN Yali, LIN Huajie 2021, 37(8): 717-721.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.010 Abstract ( 165 )   PDF (828KB) ( 258 )   Objective: To evaluate the efficiency of Waveone Gold and Reciproc Blue in removing filling materials from oval-shaped and differently curved root canals. Methods: 150 extracted human premolars with single root canal were divided into three groups according to their curvature, i.e straight canal group, moderate bending group, and severe bending group. There were 50 teeth in each group. After the completion of canal preparation and filling, each group was randomly divided into five subgroups (n=10), respectively. H file, ProTaper Universal Retreatment, Mtwo R, Waveone Gold, and Reciproc Blue were used to remove the root canal filling materials. Time and complication were recorded and the residual materials in the root canal wall were evaluated. Results: The operation time of H file was significantly longer than other groups and the whole residual amount of H was also significantly more than other groups (P＜0.05). There was no statistical difference among other machine file groups. There was 1 case of Mtwo R file separation in moderate bending group and 2 cases of Mtwo R files in severe bending group. Conclusion: Recioproc Blue and Waveone Gold could effectively remove filling materials, which showed better safety in curved oval root canals. References | Related Articles | Metrics

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Shaping Ability of New Stainless-steel Files in Simulated Canals: in Vitro Study CHEN Xixiong, GE Jiuyu 2021, 37(8): 722-726.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.011 Abstract ( 212 )   PDF (4468KB) ( 498 )   Objective: To compare the shaping ability of Gentlefile (GF), an unique stainless-steel (SS) rotary system, and Protaper (PT), a popular mechanical nickel-titanium (NiTi) system, in J-shaped simulated canals. Methods: Thirty-three resin blocks with a J-shaped canal were selected and randomly divided into 3 groups according to tip diameters: Group 1, GF red (#23); Group 2, PT F2 (#25); and Group 3, GF blue (#26). Specimens were photographed and processed by dental operating microscope and software before and after preparation. The centering ability and canal transportation in different dimensions were calculated. Canal aberration and instrument separation were also recorded. The changes of the instruments were observed by scanning electron microscope. Results: Two cases of instrument separation of GF were noted. The GF system was significantly more centered and less transported than PT F2 in the apical and middle section. There was no difference between two GF instruments. Scanning electron microscope showed that GF instruments were damaged in apical segment, but PT instruments has similar surface morphology compared with the new file. Conclusion: GF showed better anti transportation ability. However, it is recommended to use the new file only once for its probability to be damaged. References | Related Articles | Metrics

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Clinical Evaluation of Restorations for Non-carious Cervical Lesion with SDR and Ceramage XUE Kaijia, LIN Yi, LIU Jiaju 2021, 37(8): 727-731.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.012 Abstract ( 163 )   PDF (1659KB) ( 193 )   Objective: To compare the clinical effects of direct filling with SDR resin and indirect repair of non-carious cervical lesion with Ceramage polymer ceramic inlays. Methods: 52 patients with bilateral symmetric non-carious cervical lesion in mandibular first premolar with wear index Ⅲ in the Department of Stomatology of our hospital were selected from September 2018 to August 2019. Each pair of the defects was randomly divided into group A and group B. The two groups were respectively filled with SDR resin and repaired with Ceramage polymer ceramic inlay. After 1 month, 3 months, and 12 months, the clinical effects of these two methods were evaluated by checking the defects of the filling body, the degree of edge coloration, the degree of edge tightness, and the tooth sensitivity after operation. Results: 12 months after filling, there was no loss or defect in the two restorations. The difference of marginal tightness between two restorations after 12 months of filling was not statistically significant (P>0.05), however, the difference of edge staining degree was statistically significant (P<0.05). The edge coloring degree of group B was lighter than group A. The sensitivity of two groups of teeth after 1 month of filling was statistically significant (P<0.05), in which the sensitivity of group B was lower than that of group A. Conclusion: Both Ceramage polymer ceramic inlay and SDR resin are ideal materials for repairing non-carious cervical lesion. The postoperative edge coloring process and postoperative sensitivity rate of Ceramage polymer ceramic inlays were better than those of SDR resin direct filling. References | Related Articles | Metrics

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Microleakage Performance of SonicFill in Direct and Indirect Restoration of Class Ⅱ Cavities in Posterior Teeth ZHU Yunwo, HE Wanzhi 2021, 37(8): 732-736.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.013 Abstract ( 180 )   PDF (1987KB) ( 293 )   Objective: To compare the marginal microleakage of SonicFill between direct and indirect restoration of class Ⅱ cavities in posterior teeth. Methods: 50 human premolars were randomly divided into two groups with 25 teeth in each group. Group A was directly filled with SonicFill, and Group B was restored with SonicFill inlay. After thermocycling, 5 samples were randomly selected from each group for scanning electron microscope, and the remaining samples were stained with magenta and observed the staining of the occlusal and gingival margins under a stereomicroscope, and the penetration depth of the dye was measured and graded. Results: Under the scanning electron microscope, it was found that the restorations of two groups were well integrated with the tooth tissue, and little gaps were observed in both groups. The amount of gaps in group A was larger than that of group B. The dye penetration depth of group B was lower than that of group A (P<0.05) at the gingival margin, but there was no significant difference between the two groups (P>0.05) at the occlusal margin. Conclusion: SonicFill inlay is better than direct SonicFill restoration in the performance of microleakage. References | Related Articles | Metrics

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Clinical Effect of Root Canal Microscope Combined with Ultrasonic Oscillation in Root Canal Treatment HUANG Dacui, ZHAO Suli 2021, 37(8): 737-740.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.014 Abstract ( 172 )   PDF (788KB) ( 247 )   Objective: To observe and analyze the clinical effect of root canal microscope combined with ultrasonic oscillation in root canal treatment. Methods: From February 2018 to February 2019, 80 patients who needed root canal treatment were admitted to the Department of Stomatology of our hospital and were randomly divided into study group and control group, with 40 cases in each group. Patients in the study group underwent root canal therapy with microscope combined with ultrasonic oscillation technology, and patients in the control group underwent root canal therapy with conventional techniques. The patients were evaluated with visual analogue scale (VAS) and measured the content of serum interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and high sensitivity C-reactive protein (hs-CRP) before and after treatment. And the overall treatment efficiency and patient satisfaction were also assessed. Results: The VAS scores of two groups of patients after the treatment were lower than those before the treatment, and the study group was lower than the control group (P＜0.05). The content of IL-6, TNF-α, and hs-CRP of two groups of patients were lower than those before the treatment, and the study group was lower than the control group (P＜0.05). The overall effective rate of the study group was 95.00%, which was higher than 77.50% in the control group (P<0.05). Conclusion: Compared with the traditional technology, the root canal treatment used by microscope combined with ultrasonic vibration could effectively reduce the pain of patients after treatment, reduce the level of inflammatory factors, and improve the overall effectiveness and patient satisfaction. It is worthy of clinical promotion. References | Related Articles | Metrics

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Chemical Affinity of 10-methacryloyloxydecyl Dihydrogen Phosphate to Dental Zirconia in Different Mixed Solvents: Thermodynamic Calculation and Analysis LIAO Mengyuan, CHEN Chen, XIE Haifeng 2021, 37(8): 741-745.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.015 Abstract ( 229 )   PDF (896KB) ( 125 )   Objective: To analyze the chemical affinity of 10-MDP to Y-TZP in different ratios of ethanol/acetone mixed solvent conditions. Methods: Various models were created for molecular MDP, tetragonal zirconia crystals, and MDP-Zr4O8 system. Configurations of these models were undertaken using the "Our-own N-layered integrated molecular orbital and molecular mechanics" (ONIOM) method. Interactions between MDP and Zr4O8 clusters were analyzed by calculation of their Gibbs free energy values and equilibrium constants in different solvent conditions (ethanol and acetone volume ratio were 10∶0,9∶1,8∶2,7∶3,6∶4). Results: Gibbs free energy (kJ/mol) of total reaction between MDP and Zr4O8 clusters were -204.43, -206.07, -207.72, -209.35, and -210.96 kJ/mol. The negative signs indicated that reactions could occur in different solvent conditions. Equilibrium constant of total reaction were 0.68×1036, 1.32×1036, 2.56×1036, 4.96×1036, and 9.50×1036 in different solvent conditions, suggesting that the latter was more stable. Conclusion: Acetone solvent conditions promote coordination between MDP and Y-TZP, thereby increasing the strength of the "P-O-Zr" bond. References | Related Articles | Metrics

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Influence of Er:YAG Laser-activated Post Space Irrigation on Fiber Post Microleakage ZHANG Min, ZHANG Xiaojie, ZHENG Cangshang, ZHU Yaomin 2021, 37(8): 746-749.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.016 Abstract ( 164 )   PDF (1306KB) ( 240 )   Objective: To study the influence of Er:YAG laser-activated post space irrigation on fiber post microleakage. Methods: A total of 30 extracted upper incisors with similar size and shape were randomly divided in 3 groups. After　conventional root canal treatment and post space preparation, three kinds of irrigation (sodium chloride solution, 2.5% sodium hypochlorite, and Er:YAG laser with 2.5% sodium hypochlorite) were applied to the post space. After sticking fiber post with bond, the specimens were cut out 6 mm　from cement-enamel junction. The degree of microleakage was measured by Glucose oxidase-peroxidase (GOD-POD) method. Results: The microleakage　degrees of sodium chloride solution, 2.5% sodium hypochlorite, and Er:YAG laser with 2.5% sodium hypochlorite were (0.941±0.096) mmol/L, (0.911±0.075) mmol/L, and (0.889±0.102) mmol/L, respectively (P＜0.05). Conclusion: Er:YAG laser-activated post space irrigation can reduce the microleakage of fiber post. References | Related Articles | Metrics

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Correlation Study of Psychological Resilience and Life Quality in Patients before and after Orthognathic Surgery YANG Xin, WANG Xiaoxia, LI Zili, YI Biao, LANG Cheng, LIU Xiaojing, LI Yang, HE Wei 2021, 37(8): 750-754.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.017 Abstract ( 164 )   PDF (814KB) ( 257 )   Objective: To longitudinally assess the resilience level changes in patients with dentofacial deformities before and after orthognathic surgery, and to assess its correlation with patient's life quality. Methods: Subjects of this study were dentofacial deformity patients who were admitted to Peking University Hospital of Stomatology for treatment from September 2019 to September 2020. All patients were required to fill out the CD-RISC 10 scale and OQLQ scale before surgery (T1), two weeks (T2), three months (T3), and six months (T4) after surgery. Results: Totally 96 cases had complete follow-up data. The t-test showed that the CD-RISC 10 score of patients (n=96) gradually increased after orthognathic surgery. The difference was statistically significant between T1 and T4 (P=0.02). According to pearson correlation analysis, the T1 stage resilience level was negatively correlated (P＜0.05) with life quality scores in T1, T2, and T3 stages. Comparing higher and lower resilience patients, statistically significant difference existed at T1, social function and facial aesthetics of T2, oral function of T3, and social function of T4. Conclusion: The level of resilience in patients was improved after orthognathic surgery. Resilience has positive correlation with life quality and can relieve the surgical stress. The resilience is a protective factor of life quality. References | Related Articles | Metrics

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Spatio-temporal Variational Rules of Electric Signal in Palate Development of C57BL/6J Mouse DUAN Shijun, DONG Shuxia, ZHENG Qian, WU Jun 2021, 37(8): 755-760.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.018 Abstract ( 169 )   PDF (6815KB) ( 186 )   Objective: To explore the spatio-temporal variational rules of electric signal in palate development of C57BL/6J mice, and assess the membrane potential changes of palate after selective inhibited KATP channel. Methods: DiBAC4(3) was used to trace the electric signal of embryonic palate through conversion from biological signal to optical signal with histological examination. Then the embryonic palate was cultured in vitro and treated with a selective K(ATP) channel inhibitor (HMR1098) for 24, 48, and 72 hours. The expression levels of TGF-β3 during palatogenesis were examined by immunohistochemistry analysis. Results: The oral, nasal, and medial edge epithelium existed obvious electrical signal during the four palatal development phases. The electrical signal intensity of medial edge epithelium decreased gradually along with palatogenesis. After treated by HMR1098, the palatal process could still elevate, contact, and fuse in vitro, however, the form of palatal process was slenderer and sharper. The TGF-β3 was strongly expressed in the oral, nasal, and medial edge epithelium after treated for 24h. With the increase of the HMR1098 treatment time, the expression of TGF-β3 trended to decline, eventually disappear. Conclusion: There were spatio-temporal variation of electric signal during palatogenesis, and the endogenous electrical fields affected the development of palate. References | Related Articles | Metrics

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Application of Chitosan Alginate Composite Sponge for Treatment of Dry Socket in Rats CUI Feiyan, LI Lei, LI Na, YUAN Zhuang, MENG Jian 2021, 37(8): 761-765.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.019 Abstract ( 160 )   PDF (3684KB) ( 179 )   Objective: To study the therapeutic effect of chitosan alginate sponge in dry socket of rats and to provide basis for clinical application. Methods: Chitosan sodium alginate composite sponge was prepared and performed in vitro bacteriostatic test. 45 SD male rats were extracted the maxillary first molar and infected with dry socket, which were randomly divided into three groups: Group A, blank group, Group B, chitosan alginate composite sponge group, and Group C, iodine imitation yarn group. The wound healing was observed and recorded after treatment. The maxillary bone was removed and decalcified. HE staining was used for histopathological observation, and the expression of gingival IL-6 and IL-10 was detected by immunohistochemistry. Results: Compared with Group A, Group B had better healing and inflammation control observed by naked eye, histopathological analysis, and immunohistochemistry analysis (P<0.05), and there was no difference between Group B and Group C (P＞0.05). Conclusion: Chitosan sodium alginate composite sponge has antibacterial and anti-inflammatory property. The treatment of rat dry socket with sponge can achieve the same therapeutic effect as iodine imitation yarn. References | Related Articles | Metrics

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Relationship between Airborne Endotoxin and Microbial Aerosol with Patient Mobility in Dental Clinic Environment CUI Chao, ZHAI Zhenzhen, ZHOU Bo, LIU Huanying, LEI Lei, GAO Jing 2021, 37(8): 767-770.  DOI: 10.13701/j.cnki.kqyxyj.2021.08.020 Abstract ( 154 )   PDF (1450KB) ( 189 )   Objective: To verify the correlation between airborne endotoxin and microbial aerosol and patient mobility in the dental clinic environment. Methods: AGI-30 air microorganism sampler was used to sample airborne endotoxin. Andersen-6 impingement air microorganism sampler was used to sample microbial aerosol. The SPSS 20.0 statistical software was used to analyze the correlation of airborne endotoxin and microbial aerosol and patient mobility. Results: The results showed that airborne endotoxin and gram-negative bacteria and patient mobility were extremely significant linear relationship. Conclusion: In order to prevent the risk of airborne endotoxin and microbial aerosol in the dental clinic setting, the management of patient flow needs to be strengthened. References | Related Articles | Metrics