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Chinese Journal of Dental Research

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
https://www.readbyqxmd.com/read/26981606/mechanical-properties-of-orthodontic-thermoplastics-petg-pc2858-after-blending
#9
COMPARATIVE STUDY
Yan Song Ma, Dong Yu Fang, Ning Zhang, Xue Jia Ding, Kun Ya Zhang, Yu Xing Bai
OBJECTIVE: To characterise and compare the tensile characteristics after multi-proportional blending, to determine the proper blending ratio for new thermoplastic material and to compare its mechanical performance with commercial thermoplastics. METHODS: PETG and PC2858 aggregates were blended in five different ratios. Standard specimens of each ratio were molded and tested to determine their mechanical performance. Then the new material with the proper blending ratio was chosen and compared against commercial thermoplastics...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981605/non-steroidal-anti-inflammatory-drugs-attenuate-hyperalgesia-and-block-upregulation-of-trigeminal-ganglionic-sodium-channel-1-7-after-induction-of-temporomandibular-joint-inflammation-in-rats
#10
COMPARATIVE STUDY
Rui Yun Bi, Yun Ding, Ye Hua Gan
OBJECTIVE: To investigate the association between the analgesic effect of non-steroidal antiinflammatory drugs (NSAIDs) and sodium channel 1.7 (Nav1.7) expression in the trigeminal ganglion (TG). METHODS: Temporomandibular joint (TMJ) inflammation was induced by complete Freund's adjuvant (CFA) in female rats. Ibuprofen, diclofenac sodium and meloxicam were given intragastrically before induction of TMJ inflammation. Histopathological evaluation and scoring of TMJ inflammation was used to evaluate the level of inflammation...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981604/molecular-mechanisms-of-chemoresistance-in-oral-cancer
#11
REVIEW
Cheng Wang, Xi Qiang Liu, Jin Song Hou, Jian Ning Wang, Hong Zhang Huang
Oral cancer is an aggressive disease with the propensity for local recurrence and distal metastasis in the head and neck region. Currently, cisplatin-based chemotherapy or concurrent radiochemotherapy is still the first choice to treat the advanced stage cancers, in particular, the unresectable tumours. Unfortunately, innate and acquired resistance to chemotherapy agent greatly limited its effectiveness and often led to treatment failure in these patients. Hence, it is urgent to clarify the mechanisms underlying the development of chemoresistance in patients with oral cancer...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981603/human-papilloma-virus-in-oral-squamous-cell-carcinoma-the-enigma-unravelled
#12
REVIEW
Komal P Khot, Swati Deshmane, Sheetal Choudhari
Squamous cell carcinoma of the head and neck (HNSCC) has long been regarded as a disease entity having a remarkable incidence worldwide and a fairly onerous prognosis; thus encouraging further research on factors that might modify disease outcome. Squamous cell carcinomas encompass at least 90% of all oral malignancies. Several factors like tobacco and tobacco-related products, alcohol, genetic predisposition and hormonal factors are suspected as possible causative factors. Human papilloma virus (HPV), the causal agent of cervical cancer also appears to be involved in the aetiology of oral and oropharyngeal cancer...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981602/human-papilloma-virus-and-oropharyngeal-carcinoma-lessons-from-history
#13
Alexander Chris Vlantis
The human papilloma virus (HPV) is a common virus that infects epithelium in 10% of the world's population. While most sexually active people become infected, the majority with a healthy natural immunity control their infection. When the infection becomes persistent in cervical mucosa for instance, it is associated with nearly all cervical cancers. Fortunately cervical cancer screening is both sensitive and specific and when accessed has led to significant reductions of this disease. Despite this, cervical cancer still remains one of the leading causes of death from cancer...
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/26981601/time-flies-and-the-new-year-of-2016-has-finally-arrived-introduction
#14
EDITORIAL
Guang-Yan Yu
No abstract text is available yet for this article.
March 2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995228/a-novel-approach-using-15-natural-chitosan-gel-%C3%A2-in-the-management-of-intrabony-defects-a-pilot-study
#15
Irfana Babrawala, Prabhuji Munivenkatappa Lakshmaiah Venkatesh, Karthikeyan Bangalore Varadhan
OBJECTIVE: To evaluate the effectiveness of 15% chitosan in gel form as a periodontal regenerative material in the periodontal intrabony defects. METHODS: A pilot study split-mouth design of 10 patients within the age group of 30 to 55 years with bilateral intrabony defects ≥ 3mm and clinical attachment levels (CAL) ≥ 5mm were selected. The test site received open flap debridement with 15% Chitosan gel as a regenerative material and the controlateral side that acted as a control received only open flap debridement...
2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995227/education-status-of-oral-genetics-at-the-fourth-military-medical-university-and-other-chinese-dental-schools
#16
Yan Li Zhang, Chang Ning Wang, Zhi Peng Fan, Yang Jiao, Xiao Hong Duan
OBJECTIVE: To investigate the current state of genetics education at the Fourth Military Medical University (FMMU) and compare it with other dental schools of China. METHODS: Detailed information about the history and current education status of Oral Genetics in the FMMU were collected and questionnaires were completed to acquire the feedback of twenty-seven students on the course. In the other thirty-five dental schools including the capitals of twenty-five provinces and four municipalities in China, information about the oral genetic course were collected by a telephone survey...
2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995226/effect-of-stiffness-of-cement-on-stress-distribution-%C3%A2-in-ceramic-crowns
#17
Xu Dong Dong, Hao Ran Wang, Brian W Darvell, Sai Huen Lo
OBJECTIVE: To analyse the stress distribution in monolithic- and bilayer-structured ceramic crowns by means of the finite element method (FEM), as a function of elastic modulus of the core ceramic, Ecor, and that of the cement used to lute the crown, Ecem, with a view to identifying an ideal stiffness for the cement. METHODS: A two-dimensional axisymmetric FEM model was created to represent tooth structure with a cemented ceramic crown in place. The value of Ecor was set at 70, 100, 150 and 200  GPa representative of the range of commercially available materials...
2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995225/oral-health-status-and-oral-health-care-model-in-china
#18
Jian Liu, Shan Shan Zhang, Shu Guo Zheng, Tao Xu, Yan Si
OBJECTIVE: To review the current oral health status and oral health care models in China in an effort to provide recommendations for the future implementation of these models. METHODS: A systematic literature review was conducted. The Medline, EMBASE, CNKI and Wanfang databases were searched for English and Chinese articles reporting relevant data from 1949 to the present. Data from three national oral health epidemiology surveys, Chinese government reports and national statistics yearbooks from 2011 to 2015 were also included...
2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995224/comparison-of-oral-health-status-in-asia-results-for-eight-emerging-and-five-high-income-countries-or-regions-and-implications
#19
Ruediger Saekel
OBJECTIVE: To review the burden of oral disease by investigating the current situation of oral health status in selected countries within the regions of South, East and South-East Asia, with a view to determining which countries are performing better than others and why. METHODS: The study is descriptive and observational in nature and the material is derived from existing databases. As this is a cross-sectional investigation, it offers evidence about relationships and influencing factors...
2016: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/27995223/three-basic-steps-for-applying-digital-images-%C3%A2-to-oral-and-facial-surgery
#20
Michelle Zawartka, Jing Wang, Bin Zheng
In this paper, the authors discuss three basic steps related to the application of digital technology to reconstructive oral and maxillofacial surgery (OMFS), in an effort to improve surgical outcomes. These steps include acquiring digital images, processing images in order to build three-dimentional structures, and mapping images to patient anatomy for guided surgery. For each step mentionioned, available technologies and barriers that need to be overcome are discussed. Digital technology is still under development and it has begun to merge into surgical care...
2016: Chinese Journal of Dental Research
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