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Chinese Journal of Dental Research

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https://www.readbyqxmd.com/read/28573265/a-rare-case-of-malignant-melanoma-of-the-mandible-%C3%A2-ct-and-mri-findings
#1
Ichiro Ogura, Yoshihiko Sasaki, Ayako Kameta, Mikiko Sue, Takaaki Oda
Malignant melanoma of the mandibular gingiva is extremely rare. It is a malignant tumour of melanocytes or their precursor cells, and often misinterpreted as a benign pigmented process. A few reports have described computed tomography (CT) and magnetic resonance imaging (MRI) findings of malignant melanoma in the oral cavity. We report a rare case of malignant melanoma of the mandible and the related CT and MRI findings. Soft tissue algorithm contrast-enhanced CT showed an expansile mass and irregular destruction of alveolar bone in the right side of the mandibular molar area...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28573264/effects-of-combining-insulin-like-growth-factor-1-and-platelet-derived-growth-factor-on-osteogenesis-around-%C3%A2-dental-implants
#2
Wan Lin Zhou, Lin Lin Li, Xin Ru Qiu, Qi An, Mei Hua Li
OBJECTIVE: To explore the effects of the combination of insulin-like growth factor 1 (IGF-1) and platelet-derived growth factor (PDGF) on bone formation around dental implants. METHODS: A total of 24 adult rabbits were included in this experiment. Titanium machine-polished dental implants were placed in the iliac bones to simulate dental implants in the alveolar bone. The rabbits were randomly divided into four groups; a saline treated control group (NS), an IGF-1 treated group, a PDGF-BB treated group, and a combination of IGF-1 and PDGF-BB treated group...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28573263/risk-factors-associated-with-early-childhood-caries
#3
Hui Bin Sun, Wei Zhang, Xiao Bin Zhou
OBJECTIVE: To analyse factors associated with the susceptibility of early childhood caries (ECC), populations with a high risk of ECC were screened and guidance for ECC prevention was proposed. METHODS: A total of 392 children aged 24 to 71 months were selected for oral examination in Qingdao. Parents or guardians of the participants completed the questionnaires and decayed missing filled surface (dmfs) were recorded. Differences in caries condition and oral health behaviour in different families were compared...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28573262/proposing-a-novel-three-level-definition-of-periodontitis-%C3%A2-using-probing-depth-clinical-attachment-loss-and-bleeding-on-probing-analysis-of-a-rural-chinese-population
#4
Xi Yan Pei, Lu He, Xiang Ying Ouyang
OBJECTIVE: To propose a novel, three-level (severe, moderate, mild) case definition using probing depth (PD), clinical attachment loss (CAL) and bleeding on probing (BOP) for epidemiologic studies on periodontitis. METHODS: Case definitions (DEF) 1-30 with PD, CAL and BOP were made. Based on data from epidemiologic research in Chengde (Hebei Province, China) in 1992, prevalence of periodontitis by DEF1-30 was calculated and compared with a reference (definitions by Centers for Disease Control and Prevention/American Academy of Periodontology in 2012)...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28573261/development-of-oral-health-impacts-on-daily-living-questionnaire-items-a-qualitative-study
#5
Jian Liu, May Chun Mei Wong, Edward Chin Man Lo
OBJECTIVE: To develop an instrument to measure Oral Health-related Quality of Life (OHQoL) and the changes after dental treatment among older adults in Hong Kong, in order to understand their views on the influences of oral health problems and generate relevant items to design the instrument. METHODS: A qualitative study was conducted among adults aged 55 and over. Information on their perceived oral health impacts was collected during semi-structured interviews...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28573260/trend-analysis-of-betel-nut-associated-oral-cancer-%C3%A2-and-health-burden-in-china
#6
Yan Jia Hu, Jie Chen, Wai Sheng Zhong, Tian You Ling, Xin Chun Jian, Ruo Huang Lu, Zhan Gui Tang, Lin Tao
OBJECTIVE: To forecast the future trend of betel nut-associated oral cancer and the resulting burden on health based on historical oral cancer patient data in Hunan province, China. METHODS: Oral cancer patient data in five hospitals in Changsha (the capital city of Hunan province) were collected for the past 12 years. Three methods were used to analyse the data; Microsoft Excel Forecast Sheet, Excel Trendline, and the Logistic growth model. A combination of these three methods was used to forecast the future trend of betel nut-associated oral cancer and the resulting burden on health...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232967/a-rare-case-of-two-accessory-maxillae-%C3%A2-with-bilateral-tessier-7-clefts
#7
Shuang Yin, Ruo Han Ma, Jin Li, Lian Ma, Shu Ming Liu, Gang Li
A 10-year-old Chinese girl with two accessory maxillae and bilateral Tessier no. 7 clefts is presented. Radiographic examination showed two accessory maxillae, each containing 5 or 6 supernumerary permanent teeth. The two accessory maxillae extended from the inside of the zygomatic arch to the maxillary tuberosity symmetrically. Duplication of the maxilla is always associated with Amniotic Band Syndrome (ABS), but this case may be a distinct syndrome representing an under-recognised phenotype with bilateral maxillae duplication and Tessier no...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232966/salivary-iga-interleukin-1%C3%AE-and-mmp-8-as-salivary-biomarkers-in-chronic-periodontitis-patients
#8
Vanik Rangbulla, Ashutosh Nirola, Madhu Gupta, Priyanka Batra, Mili Gupta
OBJECTIVE: To compare the clinical parameters and levels of salivary immunoglobulin A (IgA), Interleukin-1β (IL-1β) and matrix metalloproteinase-8 (MMP-8) in patients with moderate to severe chronic periodontitis and in individuals with healthy gingiva. METHODS: Levels of clinical parameters plaque index (PI), gingival index (GI), probing depth (PD), clinical attachment level (CAL) and bleeding on probing (BOP) along with salivary biomarkers salivary IgA, IL-1β and MMP-8 were recorded among 50 adults (30 test subjects with moderate to severe generalised chronic periodontitis, constituting group A, and 20 periodontally healthy controls - group B)...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232965/comparison-of-cephalometric-hard-and-soft-tissues-%C3%A2-of-adolescents-with-angle-class-ii-division-1-malocclusion-between-northern-chinese-population-and-northern-indian-population
#9
Naman Rana, Yin Ying Qu, Yao Wei, Lin Liu
OBJECTIVE: To determine if there was a difference in hard and soft tissue between northern Chinese and northern Indian adolescents with Angle Class II division 1 malocclusion. METHOD: A total of 40 Angle Class II division 1 patients, including 20 boys and 20 girls aged 10 to 13 years with no prior treatment, were selected from northern China and northern India, respectively. Overall, 80 cephalometric data were analysed based on two-sample t-test with SPSS software...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232964/quantity-of-candida-colonies-in-saliva-%C3%A2-a-diagnostic-evaluation-for-oral-candidiasis
#10
Pei Ru Zhou, Hong Hua, Xiao Song Liu
OBJECTIVE: To investigate the relationship between the quantity of Candida colonies in saliva and oral candidiasis (OC), as well as to identify the threshold for distinguishing oral candidiasis from healthy carriage. METHODS: A diagnostic test was conducted in 197 patients with different oral problems. The diagnosis of OC was established based on clinical features. Whole saliva samples from the subjects were cultured for Candida species. Receiver operating characteristic (ROC) curve analysis was used in this study...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232963/teeth-under-high-occlusal-force-may-reflect-occlusal-trauma-associated-periodontal-conditions-in-subjects-%C3%A2-with-untreated-chronic-periodontitis
#11
Shuang Ying Zhou, Hina Mahmood, Cai Fang Cao, Li Jian Jin
OBJECTIVE: To determine the association of high occlusal force (HOF) with the signs of occlusal trauma and periodontal conditions in periodontitis patients, and elaborate the relevant clinical implications. METHODS: Periodontal parameters and signs of occlusal trauma were recorded for 807 teeth in 30 subjects with untreated chronic periodontitis. The T-scan II occlusal analysis system determined the HOF during maximum intercuspation, lateral excursion and protrusive excursion...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28232962/improvement-of-implant-placement-after-bone-augmentation-of-severely-resorbed-maxillary-sinuses-with-tent-pole-grafting-technique-in-combination-with-rhbmp-2
#12
Qiao Zhang, Li Li Zhang, Yang Yang, Yi Zhen Lin, Richard J Miron, Yu Feng Zhang
OBJECTIVE: To study the clinical effect of short implant placement using osteotome sinus floor elevation technique and tent-pole grafting technique with recombinant human bone morphogenetic protein 2 (rhBMP-2) in severely resorbed maxillary area. METHODS: Eleven patients with insufficient bone height in the posterior maxillary area were included. According to the native bone height and crown height space (CHS), the patients were divided into two groups: immediate placement of short implants with simultaneous bone augmentation (group A, 5 patients) and delayed dental implant placement (4 to 6 months) after bone augmentation...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379350/partial-pulpotomy-of-immature-teeth-with-apical-periodontitis-using-bioceramics-and-mineral-trioxide-aggregate-a-report-of-three-cases
#13
Shan Jiang, Hao Wu, Cheng Fei Zhang
Pulpal necrosis of an immature permanent tooth with an open apex poses a challenge for the clinician. The conventional apexification technique using calcium hydroxide has yielded short-term success, but this technique has inevitable shortcomings. Hence, this case series aimed to evaluate the effectiveness of using bioceramics (iRoot BP) or mineral trioxide aggregate (MTA) for partial pulpotomies. Three boys aged 9 to 11 years old presented with partial pulp necrosis and symptomatic apical periodontitis of the mandibular right and left second premolar...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379349/inhibition-of-enterococcus-faecalis-by-calcium-peroxide
#14
Yong Liang Su, Xiao Yan Wang
OBJECTIVE: To investigate the inhibition of Enterococcus faecalis by calcium peroxide (CaO₂). METHODS: The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of Enterococcus faecalis by CaO₂ and calcium hydroxide (Ca(OH)₂) were determined by direct exposure tests (n = 10). The inhibition zone of E. faecalis mycoderm treated with CaO₂ and Ca(OH)₂ paste (53% w/w) was observed using agar diffusion tests (n = 20). The inhibition of E...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379348/osteoprotegerin-promotes-cementoblastic-activity-of-murine-cementoblast-cell-line-in-vitro
#15
Ying Ying Zhang, Hua Xiang Zhao, Zhi Bin Chen, Jiu Xiang Lin, Yan Liu
OBJECTIVE: To investigate the effect of osteoprotegerin (OPG) on the cementoblastic activity of a clonal population of immortalised murine cementoblasts (OCCM-30) in vitro. METHODS: OCCM-30 cells were transiently transfected with the mouse OPG using the Avalanche transfection reagent. The ectopic expression of OPG was confirmed by enzyme-linked immunosorbent assay and quantitative polymerase chain reaction. The cell counting Kit-8 assay was used to investigate the effect of OPG on cell proliferation...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379347/asymmetric-head-gear-a-comparison-between-unilateral-outer-bow-expansion-and-unilateral-outer-bow-shortening-an-energy-approach-using-the-finite-element-method
#16
COMPARATIVE STUDY
Allahyar Geramy, Domingo Martin, Joseph Bouserhal, Elham Sadat Emadian Razavi, Mehdi Hassanpour
OBJECTIVE: To compare the influence of outer bow length difference and unilateral outer bow expansion on the 'asymmetric effect' of the headgear. METHODS: Twelve 3D finite element models of a headgear with two tubes were designed, which were similar except for the outer bow length or the degree of unilateral expansion in Solid-Works 2011. A 3N force was applied to the outer bow ends in ANSYS Workbench 12.1 and the distalising, lateral forces to molars, moments and the energy of the system were evaluated...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379346/effect-of-capsaicin-cream-on-the-secretion-of-the-submandibular-and-parotid-gland-in-the-general-population-with-different-chilli-eating-habits
#17
Yang Wang, Zhen Wang, Guang Yan Yu, Zhan Gui Tang, Ji An Hu
OBJECTIVE: To investigate the effect of capsaicin cream on the secretion of the submandibular gland (SMG) and the parotid gland (PG) in the general population, with different chilli-eating habits. METHODS: In two groups with different chilli-eating habits, the salivary flow rate of the SMG and the PG was detected at statics and different times, after application of capsaicin cream. RESULTS: In both groups, the topical application of capsaicin cream could significantly increase the salivary secretion of SMG (P < 0...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27379345/new-analytical-tools-for-evaluating-dental-care-systems-results-for-germany-and-selected-highly-developed-countries
#18
Rüdiger Saekel
OBJECTIVE: To propose new analytical tools that facilitate the obtention of quantifiable results for evaluating different dental care systems. METHODS: The paper describes the construction of a composite indicator that measures dental health on a population basis in one overall indicator, the Dental Health Index (DHI). If the DHI is combined with a Dental Care Cost Index, an efficiency index (EI) can be created. RESULTS: The use of these new instruments for analysing different dental care systems reveals that the Swedish and Danish populations enjoy the best dental health status, followed by US, Japanese, Australian and Canadian citizens...
June 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981608/comprehensive-oral-health-care-to-reduce-the-incidence-of-severe-early-childhood-caries-s-ecc-in-urban-china
#19
RANDOMIZED CONTROLLED TRIAL
Yan Si, Yan Guo, Chao Yuan, Tao Xu, Shu Guo Zheng
OBJECTIVE: To explore the effectiveness of comprehensive oral health care to reduce the caries incidence for children with severe early childhood caries (s-ECC) in an urban area in China. METHODS: A total of 357 children aged 3 to 4 years old and diagnosed with s-ECC were recruited in this randomised controlled, single-blinded clinical trial for 1 year. Children of two different kindergarten classes were enrolled in this study and randomly divided into a test group (205 children) and a control group (152 children)...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981607/preliminary-evaluation-of-platelet-rich-fibrin-mediated-tissue-repair-in-immature-canine-pulpless-teeth
#20
Qi Lin Wang, Pan Pan Yang, Li Hong Ge, He Liu
OBJECTIVE: To evaluate the use of platelet-rich fibrin (PRF) in the regenerative therapy of immature canine permanent teeth. METHODS: Eight immature premolars of beagle dogs were pulp extracted and cleaned with irrigation, then divided into two groups of empty root canals and those filled with a PRF clot. All of the eight premolars were sealed with mineral trioxide aggregate and glass ionomer cement. Two premolars were left naturally grown as a positive control...
March 2016: Chinese Journal of Dental Research
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