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20 September 2008, Volume 35 Issue 5 Previous Issue    Next Issue

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The expr ession of matr ix metalloproteinase- 1 and tissue inhibitor s of metallo XIE Yong-jian, MAI Li-xiang, ZHANG Sheng, GUO Hui, WANG Yang, WANG Da-wei Inter J Stomatol. 2008, 35 (5):  481-481～484，605.  Abstract ( 1978 )   HTML ( 5 )   PDF（pc） (247KB) ( 682 )   Save Objective To investigate the expression and the localization of the matrix metalloproteinase - 1（MMP - 1） and tissue inhibitors of metalloproteinase - 1（TIMP - 1）in root resorption tissue, and to elucidate the molecular changes and mechanism of root resorption induced by orthodontic force in order to establish a foundation for systemic study and prevention of root resorption in clinic. Methods Six experimental Chinese miniature pigs provided by Beijing Agricultural College were selected. Twelve mandibular deciduous lateral incisors of these six pigs were divided into four groups at random, and forces of 0, 0.98, 1.96, 2.94 N were put on each group respectively. The forces were exerted every two weeks. The animals were killed after forty- five days, and the specimens were made which were observed by light microscope. The cells in root resorpion tissue that produced MMP-1 or TIMP- 1 were identified using immunohistochemistry. Results The expression of MMP- 1 in root resorption tissue in Group 0.98 N, Group 1.96 N and Group 2.94 N increased evidently compared with Group 0 N, and the expression of TIMP- 1 in root resorption tissue in Group 0.98 N and Group 1.96 N increased evidently compared with Group 0 N. But the expression of TIMP- 1 in root resorption tissue in Group 2.94 N had no difference with Group 0 N. Conclusion MMP- 1 and TIMP- 1 participate in the normal physiological metabolization of extracellular matrix and the normal remodeling of periodontal tissue during teeth movement on orthodontics treatment MMP-1 and TIMP- 1 play a significant role during root resorption. Related Articles | Metrics

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Clinic effects of tr eating Angle Ⅱ with high angle by lip- ar ch with tip back WU Xiuping, ZHAO Zhi- he, ZHAO Mei- ying Inter J Stomatol. 2008, 35 (5):  485-485～487.  Abstract ( 1443 )   HTML ( 9 )   PDF（pc） (36KB) ( 3041 )   Save Objective To study the effects of lip- arch with tip back bend and V bend to the Angle Ⅱ with overbite and high angle patients. Methods 20 patients with overbite and high angle were selected and treated with lip- arch. The lip- arch was ligatured on straight wire bracket wings. It generated the point- contact between the wire and the bracket, which was of benefit to opening the overbite. After opening the overbite, the square wire changed was ligatured in bracket slot to maintain the efficacy. Their cephalometry radiographs were measured and analyzed before and after treatment. Results The angle of ANB and distance of U1C- PP（mm）, L1C-MP（mm）, OB（mm）were statistically significant before and after treatment. But there was no difference in the U6- PP （mm）, L6-MP（mm）and FH-MP angle. Conclusion It suggest that lip- bow with tip back bend and V bend can effectively improve the deep overbite in class Ⅱ patients with high angle by controlling the anchorage. Related Articles | Metrics

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MBT br ackets- cur ing adhesive cur ing and chemical bonding in clinical applicat XU Ying, QU Bai- ling, FAN Ming. Inter J Stomatol. 2008, 35 (5):  488-488～490.  Abstract ( 1937 )   HTML ( 5 )   PDF（pc） (37KB) ( 1969 )   Save Objective To compare the light - cured resin composites and the Beijing- Tianjin enamel adhesive bonding MBT brackets clinical results. Methods Dentition integrity of the 20 cases of non- extraction fixed orthodontic appliance cases, a total of 400 teeth, two were for the same bonding agent in patients with left maxillary and right mandibular area and right maxillary and left mandibular, were compared abnormal shedding during treatment MBT brackets situation. Results The use of light- cured resin composites and the Beijing- Tianjin enamel adhesive bonding MBT brackets by the rate of shedding had no statistical difference. Conclusion Light- cured composite resin bonding agent with the Beijing- Tianjin enamel bonding strength basically the same, but with light- cured resin composite clinical simple operation, MBT brackets bonding advantages of higher accuracy rate, it is the wider usage. Related Articles | Metrics

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Study of hepatitis B virus X protein inducing cell apoptosis LIU Chang-yong1, LI Zheng1, LI Xiao-yu2, LIU Yu-rong2, HU Huo-zhen1 Inter J Stomatol. 2008, 35 (5):  491-491～493，605.  Abstract ( 1776 )   HTML ( 5 )   PDF（pc） (263KB) ( 978 )   Save Objective To investigate the role of hepatitis B virus X（HBX） protein in cell apoptosis. Methods Eukaryotic expression vector of HBX gene was constructed. Recombination vector mentioned above was transfected by Lipofectamine to Hela cell, Hepatocarcinoma cell（SMMC- 7721） and normal mouse fetal liver cell（FL）. X protein（pX） expressed in these three cell type was detected by immunohistochemical method. The apoptosis in Hela- X cells was analyzed by flow cytometry and the terminal deoxynucleotidyl transferase mediated deoxyuridine triphosphate fluorescence nick end labeling（TUNEL）method. Results In three cell type, pX expressed. A stable pX- expression cell line was selected by G418. HBX protein could express in Hela cells in 20 passages. Conclusion HBX protein could induce apoptosis in vitro. Related Articles | Metrics

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Analyse of the unstimulated saliva flow r ate and saliva glucose mass concentr at GUO Bin1, XIE Si-jing2, AN Zhen-mei3, QUE Ke-hua1, YANG Fan1, LIU Jing1, ZHOU Xue-dong1 Inter J Stomatol. 2008, 35 (5):  494-494～496.  Abstract ( 1736 )   HTML ( 5 )   PDF（pc） (35KB) ( 1108 )   Save Objective The aim of this study was to compare and analyse the unstimulated saliva flow rate（SFr）and saliva glucose mass concentration（SGc） in the diabetic and the healthy elders. Methods The study comprised randomly sampled 20 type 2 diabetic aged in patients from West China Hospital of Sichuan University（diabetic group）, 20 age- and gender- matched healthy aged people（control group）. Saliva was tested for unstimulated flow rate and glucose mass concentration. Results There were no significant differences in SFr between the diabetic and control group（P>0.05）. The diabetic group had statistically higher SGc than the control（P<0.05）. Conclusion The saliva glucose mass concentration of aged diabetic people increases, compared with the healthy. Related Articles | Metrics

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Clinical effect of calcium hydroxide as an intr acanal medication on post- endodo CHU Jin-pu1, LIU Xue-jun1, WANG Hong-na2. Inter J Stomatol. 2008, 35 (5):  497-497～498.  Abstract ( 1930 )   HTML ( 11 )   PDF（pc） (27KB) ( 1558 )   Save Objective The aim of this study was to evaluate the incidence of pain after pulp canal therapy of pulp necrosis teeth using calcium hydroxide as an intracanal dressing. Methods Ninety single- root necrotic premolars of 90 patients participated in this study. These teeth were randomly divided into three groups of 30 teeth. The teeth in group A were treated in a single- visit approach, the teeth in group B with a two- visit approach without any intracanal dressing and the teeth in group C with a two- visit approach using calcium hydroxide as an intracanal dressing. All of the patients were followed for 72 hours after treatment. The data were analyzed by chisquare test. Results There were significant difference between group A and group B, group B and group C（P< 0.05）. There was no significant difference between group A and group C（P>0.05）. Conclusion Calcium hydroxide can decrease painful responses to endodontic treatments Related Articles | Metrics

综述

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The lingualized occlusion of complete denture REN Wei-hong1，Eleni Roumanas2 Inter J Stomatol. 2008, 35 (5):  499-499～501.  Abstract ( 1746 )   HTML ( 6 )   PDF（pc） (34KB) ( 2103 )   Save This article reviews the literatures dealing with the lingualized occlusion of complete denture including the origin, development and research. Lingualized occlusion is a valuable concept because many advantages of anatomic and nonanatomic occlusions are retained, satisfactory occlusion is easily obtained, balanced occlusion can be accomplished. Related Articles | Metrics

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Study and development on microecology of Streptococcus mutans LIU Yuan, ZHOU Xue-dong Inter J Stomatol. 2008, 35 (5):  502-502～506.  Abstract ( 1491 )   HTML ( 8 )   PDF（pc） (48KB) ( 2844 )   Save With the development of microecology, it is paid more and more attention to the medical field. Streptococcus mutans is the main cariogenic bacteria in oral cavity, and it can result in caries through adherence, acid production and acid tolerance. The review presents investigations in recent years on Streptococcus mutans in the fields of transmission, signal conduction system, cariogenicity and immunization against dental caries. Related Articles | Metrics

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Development in study of quorum sensing signal molecule AI - 2 in Streptococcus mu WANG Wei-lu, LING Jun-qi Inter J Stomatol. 2008, 35 (5):  507-507～508，512.  Abstract ( 1672 )   HTML ( 5 )   PDF（pc） (37KB) ( 719 )   Save Quorum sensing is a process of cell- to- cell communication in Streptococcus mutans which secretes a special signal molecule, then induces and actives the expression of related genes, in order to coordinate the biological behaviors of Streptococcus mutans. Recently a new signal molecule, AI- 2, is regarded as a general signal molecule, involoving in communication among oral bacteria, regulating the stability of biofilms. In this review, we summarize the previous researches on the signal molecule AI- 2 in Streptococcus mutans in recent years. Related Articles | Metrics

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Mur ine immune r esponses to differ ent str ains of Candida albicans that differ YU Ai-min,HU Yan Inter J Stomatol. 2008, 35 (5):  509-509～512.  Abstract ( 2473 )   HTML ( 6 )   PDF（pc） (43KB) ( 974 )   Save The incidence of candidiasis is obviously ascending because of the wide use of immunodepressant and chemotherapeutics nowadays. Different strains of Candida albicans, are recently considered to have different pathogenicity, due to their properties of virulence. Like wise host innate and adaptive immune responses to these strains of Candida albicans also demonstrated the diversity in animal models. The research on immune responses to different strains of Candida albicans would play an important role on the development of antifungal vaccine. Related Articles | Metrics

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C r eactive protein and per iodontitis LIU Juan, WU Ya-fei Inter J Stomatol. 2008, 35 (5):  513-513～515.  Abstract ( 1861 )   HTML ( 6 )   PDF（pc） (33KB) ( 1329 )   Save Serous C reactive protein is an important composition. Periodontitis is an inflammatory disease which mostly caused by infection of microorganism and the inflammation may induce acute phase reaction and lead to elevate serous C reactive protein level. In this article we sum up the relationship between C reactive protein and periodontitis. Related Articles | Metrics

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The latest r esear ching progr ess of the r elationship between obesity and per i YAN Xiang-zhen, YANG Pi-shan Inter J Stomatol. 2008, 35 (5):  516-516～518，522.  Abstract ( 1537 )   HTML ( 5 )   PDF（pc） (48KB) ( 790 )   Save Obesity is a systemic disease which is a risk factor for several chronic diseases, most notably type 2 diabetes and coronary heart disease. The prevalence of obesity has increased substantially over the past decades. Some studies suggest that obesity is also associated with periodontal disease, particularly periodontitis. Here studies that have examined the association between obesity and periodontitis are reviewed, and the potential biological mechanisms for the association of obesity with periodontitis are discussed. Related Articles | Metrics

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Antimicrobial defense effects of gingival epithelial cells ZHANG Li-qun, LI De-yi Inter J Stomatol. 2008, 35 (5):  519-519～522.  Abstract ( 1570 )   HTML ( 5 )   PDF（pc） (45KB) ( 1113 )   Save Gingival epithelial cells dose not provide a physical barrier to infection, it also has an active role in innate host defense. For example epithelial cell can transfer signals through cell surface receptor, produce and release antimcrobial peptides, proteinase, cytokines and etc. In order to strengthen the understanding of the defense mechanism of gingival epithelium, this article makes a summary on the relationship of gingival epithelial cells with the Toll- like receptor, antimcrobial peptides, cytokines and proteinase. Related Articles | Metrics

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Resear ch progr esses in administer Streptococcus salivarius to halitosis WEN Yan-li, WAN Hu-chun Inter J Stomatol. 2008, 35 (5):  523-523～525.  Abstract ( 2464 )   HTML ( 11 )   PDF（pc） (33KB) ( 3666 )   Save Oral malodor, also known as halitosis, is a widespread problem, which is mainly caused by volatile sulphur compound（VSC）. VSC is produced by Gram- negative anaerobic bacteria. Oral malodor reduction may be obtained by a combination of chemotherapeutical and mechanical treatments. However, these modalities exhibit only temporary effects. And some undesirable side effects may occur when they are used in the oral cavity for long periods. Streptococcus salivarius is known to be normal flora in the mouth. They might have potential applications as adjuncts for both the prevention and treatment of oral malodour. Related Articles | Metrics

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The r eview of the effect of external tooth bleaching on tooth hard tissue HE Li-bang, LI Ji-yao Inter J Stomatol. 2008, 35 (5):  526-526～528.  Abstract ( 1526 )   HTML ( 10 )   PDF（pc） (37KB) ( 711 )   Save External tooth bleaching is a popular dental procedure in dentistry. It is highly concerned whether this system could lead to tooth hard tissue's change. This paper summarized the current knowledge about the influence of external tooth bleaching on the contents of mineral elements and the enamel surface morphology of tooth hard tissue. Related Articles | Metrics

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The r epr esentation of the human or al ar ea in the somatosensory cor tex YANG Xiu-wen, LIU Hong-chen Inter J Stomatol. 2008, 35 (5):  529-529～530.  Abstract ( 1569 )   HTML ( 4 )   PDF（pc） (24KB) ( 1252 )   Save In the classical sensory homunculus proposed by penfield, there were no representations of the face, teeth and oral cavity in somatosensory cortex. The article reviewed investigations of cortical representation of oral structures in somatosensory cortex with based on non- invasive functional magnetic resonance imaging functional magnetic resonance imaging measurements. Related Articles | Metrics

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The r elationship between sur face protein of Streptococcus mutans and sor tase ZHAO Li, LIN Huan-cai Inter J Stomatol. 2008, 35 (5):  531-531～533.  Abstract ( 1592 )   HTML ( 3 )   PDF（pc） (34KB) ( 905 )   Save Surface protein P1 is one of the main adhensins of Streptococcus mutans, its presence affects its adherent abilities, hydrophobicity, cariogenicity. The sortase gene（srtA） was isolated from Streptococcus mutans. The relationship between surface protein P1 and sortase, roles of sortase in Streptococcus mutans has been reviewed in the text. Related Articles | Metrics

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Resear ch advancement about the molecular mechanism of acid toler ance of Strepto LU Shi-jun, WEI Xin Inter J Stomatol. 2008, 35 (5):  534-534～536.  Abstract ( 1461 )   HTML ( 5 )   PDF（pc） (34KB) ( 1756 )   Save Acid tolerance is one of the main cariogenesis factors of Streptococcus mutans. Although the molecular mechanism is not clear now, several relevance genes have been separated, sequenced and cloned. This is a review about these related genes and their possible mechanism of action. Related Articles | Metrics

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Resear ch progr ess of the polymer ization shr inkage str ess of r esin composite WU Wan-cui, WEI Xi Inter J Stomatol. 2008, 35 (5):  537-537～539.  Abstract ( 2037 )   HTML ( 10 )   PDF（pc） (34KB) ( 2504 )   Save As a useful tooth- colored dental restorative material, resin composite is esthetic and convenient. However, it is weak in polymerization shrinkage, poor wear resistance and color changing. Polymerization shrinkage will induce gap between teeth and the filling resin composite, enamel cracks and cuspal movement, which account for restoration failure. Factors affecting the polymerization shrinkage stress include the composition of the resin composite, cavity configuration and the clinical manipulation. Polymerization shrinkage stress should be reduced to increase the success rate of filling resin composite. Related Articles | Metrics

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Development in the study of influential factor s associated with gene tr ansfecti YANG Ya-ping, FAN Ming-wen Inter J Stomatol. 2008, 35 (5):  540-540～542.  Abstract ( 1539 )   HTML ( 4 )   PDF（pc） (36KB) ( 1231 )   Save With the development in non- viral gene delivery systems, chitosan- DNA complex is being widely applied in prophylaxis and treatment of various diseases. The transfection efficiency mediated by chitosan has much to do with the effect, and the related influential factors are complicated and interacted. Recent research advances on the influence of the preparing parameters，the nature of the chitosan- DNA complex as well as the transfection condition on the transfection efficiency will be summarized in this review. Related Articles | Metrics

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The influence of fluor ide on tooth development WANG Jiang, NI Long-xing Inter J Stomatol. 2008, 35 (5):  543-543～545.  Abstract ( 1829 )   HTML ( 4 )   PDF（pc） (32KB) ( 1369 )   Save Fluorine is one of the most important microelement in human body, which has crucial functions during the development of our teeth and the caries prevention. Overtaken of the fluorine during the odontogenesis will cause dental fluorosis. The particular pathological feature of the dental fluorosis implied the influences of the fluorid in odontogenesis directly and indirectly. Researches showed that, fluorid can influence the mineralization process through different ways, including the secreted enamel extracellular matrix, proteins, multiple proteases, ameloblasts and transmembrane transport of the inorganic ions. Excess uptake of the fluorid can decrease the amount of the enamel and dentin matrix proteins, including collagen and noncollagen proteins which may influence their normal functions during mineralization. So, it is widely accepted now that, fluorid have multiple effects on teeth formation and development. This review aims to outline the effects of fluoride on the biological processes involved in the formation of tooth tissues. Related Articles | Metrics

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Biofilm and infection control of dental unit water lines ZHANG Xiao-huan, LING Jun-qi Inter J Stomatol. 2008, 35 (5):  546-546～549.  Abstract ( 1419 )   HTML ( 5 )   PDF（pc） (42KB) ( 1232 )   Save There are microbes, which are planktonic and biofilms adhered on the surfaces of tube, in dental unti water lines（DUWL）, and the contaminated water source has a potential to cause a hospital infection. However, nowadays the disinfection and/or infection control of DUWL have become the routine work in either dental hospitals or clinic practice through the world. In this article, the methodology of infection control and the biological features of biofilm of DUWL were reviewed. Related Articles | Metrics

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Advancement of the gene SH3BP2 in cherubism and its affection to osteoclasts with LI You-wei1, GAO Ping1, MENG Xue-mei2 Inter J Stomatol. 2008, 35 (5):  550-550～552，568.  Abstract ( 1565 )   HTML ( 3 )   PDF（pc） (44KB) ( 921 )   Save Cherubism is a rare autosomal dominant disorder with incomplete penetrance characterized by extensive pathological bone remodeling according to the high activation of osteoclasts in the lesions within the mandible or maxilla due to heterozygous germline mutations in the gene that encodes the adapter protein SH3BP2. This review focuses on the present research of the function of this gene, its affection to the occurrence of cherubism and the relationship with osteoclast. Related Articles | Metrics

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Advanced r esear ch on induced differ entiation of adipose tissue- der ived strom GUAN Xiao-guang, LIU Lei Inter J Stomatol. 2008, 35 (5):  553-553～555.  Abstract ( 1265 )   HTML ( 3 )   PDF（pc） (32KB) ( 653 )   Save Current ideal seeding cells of bone tissue engineering are adipose tissue- derived stromal cells（ADSCs）, whose osteogenic differentiation has been a hot topic for researchers. The methods in inducing ADSCs to osteoblast are changing its microenvironment, modifying its gene and so on. This article reviewed the advanced research on induced differentiation of ADSCs to ostoblast. Related Articles | Metrics

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The r esear ch development of novel self- assembly peptide tissue engineer ing sc LIAO Feng, CHENG Xiang-rong Inter J Stomatol. 2008, 35 (5):  556-556～558.  Abstract ( 1308 )   HTML ( 3 )   PDF（pc） (30KB) ( 883 )   Save Self- assembly peptide tissue engineering scaffold is a novel nano scaffold consisting of complementary amphiphilic oligopeptide which have self- assembly character. The nano microstructure of this kind of scaffold is similar to the natural extracellular matrix and this character makes it to be a genuine three dimensional cell culture scaffold. Therefore, this kind of scaffold has some incomparable advantages and characters with other scaffolds. The next context makes a review about the structure, character and application of the self- assembly peptide tissue engineering scaffold. Related Articles | Metrics

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Non-coding ribonucleic acid and head and neck cancer HUANG Feng-hao, LI Jiang Inter J Stomatol. 2008, 35 (5):  559-559～561.  Abstract ( 1443 )   HTML ( 3 )   PDF（pc） (33KB) ( 898 )   Save Non- coding ribonucleic acid（ncRNA） is a kind of important functional biological molecule. Now, the property and role of regulation of few kind of ncRNA has been known in academic circles, but not more other kinds. This article briefly introduces the classification, biological significance and functions of ncRNA, and reviews the role of ncRNA in tumorigenesis, diagnosis and therapy of head and neck cancers. Related Articles | Metrics

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Micro- RNA and cancer GAO Ning, LI Long-jiang Inter J Stomatol. 2008, 35 (5):  562-562～564.  Abstract ( 1328 )   HTML ( 3 )   PDF（pc） (32KB) ( 1203 )   Save Micro- RNA is a class of short non- coding RNA molecules which are important gene regulation function. Researches show micro- RNA has specific expression profiles in diverse tumors and is implicated in tumorgenesis as suppressors and oncogenes. Here, we review the progresses on this field and their clinic significance. Related Articles | Metrics

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Advance r esear ch of application of RNA inter fer ence to stomatology< ZHOU Hao, LIANG Xin-hua Inter J Stomatol. 2008, 35 (5):  565-565～568.  Abstract ( 1530 )   HTML ( 2 )   PDF（pc） (43KB) ( 1474 )   Save RNA interference（RNAi） has emerged as one of the most important discoveries of the last years in the field of molecular biology. It has become a powerful tool to research gene function, cell signaling, cell differentiation, nosogenesis and gene therapy. This review provides a brief overview of the application of RNAi in the field of stomatology. Related Articles | Metrics

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Appliance of palatal shelves organ cultur e method in the r esear ch of cleft pal LU Sheng-jun, SHI Bing Inter J Stomatol. 2008, 35 (5):  569-569～572.  Abstract ( 1680 )   HTML ( 2 )   PDF（pc） (40KB) ( 1641 )   Save Cleft lip and palate is one of the most frequent congenital malformations in human. Multidisciplinary research shows that etiology of cleft lip and palate is related with many factors and regulated by complicated molecular mechanisms. One of the main etiologies of the cleft palate is that the failure of the fusion of the opposing secondary palates. The research for that step is limited by the complicated human factors in vivo. Therefore, we could adopt the method of palatal shelves organ culture in vitro. This article reviews appliance of palatal shelves organ culture methods in the research of cleft palate pathogenesis. Related Articles | Metrics

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The development of tr eating the condyle fr actur e under the assistance of endos LIU Zheng-wu1, ZHANG Zhi-guang2 Inter J Stomatol. 2008, 35 (5):  573-573～575.  Abstract ( 1577 )   HTML ( 2 )   PDF（pc） (31KB) ( 979 )   Save The condyle fracture is common in maxillofacial fractures. At present, the dispute over the treatment of condyle fracture still exist. Even though the utilization of articular endoscope in the maxillofacial regions just start in recent century, it begin to be a new situation in the condyle fracture and become more of a concern. Related Articles | Metrics

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Diagnosis and differ entiation of the neur ilemoma of the jaws WANG Chao-yang, PING Fei-yun Inter J Stomatol. 2008, 35 (5):  576-576～578，584.  Abstract ( 1598 )   HTML ( 5 )   PDF（pc） (41KB) ( 2020 )   Save Neurilemoma of the jaws is a benign tumor that arises from neurilemma cells. It is uncommon and misdiagnosed frequently. To improve the diagnosis of the neurilemoma of the jaws, more characters should be known, including that of clinical, radiology, pathology, immunohistochemistry. This article is to overview the clinical characters of the neurilemoma of the jaws and its differentiations from ameloblastoma, neurofibroma and cyst of the jaws. Related Articles | Metrics

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Relative clinical factor s of por celain- fused- to- metal color r eproduction SHANG Hai-yan, GUO Tian-wen Inter J Stomatol. 2008, 35 (5):  579-579～581.  Abstract ( 1744 )   HTML ( 3 )   PDF（pc） (32KB) ( 1005 )   Save The color reproduction is one of the most difficult problems in dental prosthetics areas. The color reproduction became a hot research with the widespread application of porcelain- fused- to- metal（PFM）. We reviewed some clinical factors which may affect the color effect of PFM. Related Articles | Metrics

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The lastest advancement of dentur e base cleansing and antimicrobial activities HAO Xiao-xing, ZHU Song Inter J Stomatol. 2008, 35 (5):  582-582～584.  Abstract ( 1506 )   HTML ( 2 )   PDF（pc） (34KB) ( 1827 )   Save Polymethyl methacrylate is the most frequently used denture base material in clinic. Dental plaque and calculus would deposite on denture surface in oral cavity, this results in many harmful effects for oral tissue. This article reviews the new findings on denture base cleansing and antimicrobial activities from two aspects, one is denture base surface treatment, the other is incorporating antibacterial agents into denture base. Related Articles | Metrics

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Progr esses on the study of r etention of fiber post and r esin cor e HOU Yong- fu, ZHU Zhi- min Inter J Stomatol. 2008, 35 (5):  585-585～587.  Abstract ( 1363 )   HTML ( 3 )   PDF（pc） (29KB) ( 1004 )   Save Fiber post and resin core system has been attracting more and more dentists′attention. This system has many advantages, and is widely used in dental clinical practice in recent years. Stable retention is one of the most important factors in the use of fiber post and resin core system. Many scholars have researched into factors which might affect the retention of this system. This article reviews studies published recently about the retention of fiber post and resin core system. Related Articles | Metrics

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Resear ch development of cor rosion of titanium in the or al bioenvironment FU Dan- li, LIU Li Inter J Stomatol. 2008, 35 (5):  588-588～590.  Abstract ( 1654 )   HTML ( 3 )   PDF（pc） (30KB) ( 2868 )   Save Titanium and its alloys are used more and more widely in the field of dental clinic. But the corrosion of titanium and its alloys in the oral environment is still a concern that has to be solved. The corrosion behaviors are closely related to the change of oral bioenvironment and mastication. This article presents a research statue of corrosion of titanium and its alloys in the oral bioenviroment where the value of pH, fluoride, protein and the temperature change a lot, thus gives us a reference to improve the corrosion resistance of titanium and its alloys. Related Articles | Metrics

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Resear ch progr ess of fiber - osseointergr ation inter face LIU Hong- hong, ZHANG Zhi- hong Inter J Stomatol. 2008, 35 (5):  591-591～592，595.  Abstract ( 1875 )   HTML ( 5 )   PDF（pc） (37KB) ( 1805 )   Save Osseointegrated dental implant has been widely used in clinics and we can find numerous researches about it. In recent years, another combination has attracted researchers′attention. That is periodontal ligament linking the implant and the bone. Researchers are finding how to promote sensory responses of the dental implants. This was a summary of the research development of this kind of bone- implant interface. Related Articles | Metrics

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Resear ch progr ess of occlusal plane LI Shao- hua, LIN Xue- feng Inter J Stomatol. 2008, 35 (5):  593-593～595.  Abstract ( 1259 )   HTML ( 2 )   PDF（pc） (37KB) ( 1201 )   Save Occlusal plane（OP）is one of important factors which affect stomatognathic system. It is an important step to confirm a suitable OP when carrying out reconstruction and rehabilitation. This article reviewed the orientation and influencing factors of OP, the relationship between OP and stomatognathic system, as well as the relationship between OP and cervical spine. Related Articles | Metrics

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Development of r esin- r einfor ced ionomer cement for bonding of or thodontic br XIE Cai- hong1, LIU Xin- qiang2 Inter J Stomatol. 2008, 35 (5):  596-596～.  Abstract ( 1629 )   HTML ( 2 )   PDF（pc） (30KB) ( 1378 )   Save Resin- reinforced ionomer cement is a new type of orthodontic bonding materials. It combines the advantages of traditional glass ionomer cement and composite resin. In this paper, we summarized its properties of adhesive, preventing demineralization of enamel, fluoride releasing and antibacteria, and so on. Related Articles | Metrics

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Resear ch process of the molecular mechanism of dental root r esorption induced b LU Jia- jing, GE Zhen- lin Inter J Stomatol. 2008, 35 (5):  599-599～601.  Abstract ( 1571 )   HTML ( 9 )   PDF（pc） (34KB) ( 1498 )   Save Various important factors interact each other to complicate the function regulation of dental root resorption. This paper intended to review the mechanism of dental root resorption induced by tooth movement and introduce the development of molecular mechanism related with dental root resorption. Related Articles | Metrics

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Relationship between open bite and the temporomandibular joint disorder LI Bing- yan 1,2, WANG Yan- min2, YI Xin- zhu2 Inter J Stomatol. 2008, 35 (5):  602-602～604.  Abstract ( 1533 )   HTML ( 14 )   Save The dentofacial morphology, deglutition pattern, the balance of masticatory muscles force and the mandibular movement are unique in the open bite patients. At present, no evidence shows that there are cause- effect relationship or interaction between open bite and the temporomandibular joint disorder. This review is about the relationship between open bite and temporomandibular joint disorder in the dentofacial morphology, the pattern of deglutition, the balance of masticatory muscles force as well as mandibular movement in the open bite patients. Related Articles | Metrics