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Bu-ling WU, Ming CHEN

2017 Vol.25(2): 69–73    [Abstract] ( 376 )    [RICH HTML ] ( 7 )   [PDF 1640 KB ]( 657 )

Mao-bin YANG, Qian ZENG

2017 Vol.25(2): 74–79    [Abstract] ( 290 )    [RICH HTML ] ( 5 )   [PDF 1070 KB ]( 368 )

Jia-jun LIU, Yu-kun MENG

2017 Vol.25(2): 80–86    [Abstract] ( 228 )    [RICH HTML ] ( 5 )   [PDF 3219 KB ]( 203 )

Ting LI, Kan CHEN, Ling-li LAN, Xiao-chun REN, Bin-bin YING, Song-song ZHU

2017 Vol.25(2): 87–92    [Abstract] ( 194 )    [RICH HTML ] ( 2 )   [PDF 3902 KB ]( 164 )

Zhen-xia LI, Ting-ting CHEN, Pei-lin LI, Jing XUE, Qiang ZHANG

2017 Vol.25(2): 93–96    [Abstract] ( 210 )    [RICH HTML ] ( 1 )   [PDF 1570 KB ]( 205 )

Ke WANG, Guo-guang PENG, Jian-hong PENG, Yu-lian TAN, Lei YANG, Shan-zhi HE, You-yuan WANG

2017 Vol.25(2): 97–100    [Abstract] ( 193 )    [RICH HTML ] ( 7 )   [PDF 1619 KB ]( 187 )

Dong-hui WU, Shao-ping CAO, Yun-ying ZHU, Jian-qiang LIANG

2017 Vol.25(2): 101–104    [Abstract] ( 234 )    [RICH HTML ] ( 2 )   [PDF 3040 KB ]( 266 )

Ai-qing LIU, Zao CHEN, Ji-dong ZHANG, qiang YUAN

2017 Vol.25(2): 105–109    [Abstract] ( 197 )    [RICH HTML ] ( 2 )   [PDF 3049 KB ]( 213 )

Abdumijiti·Renaguzi, Shi-hao LI, Zi-xian HUANG, Ze-man QIN, Zhi-quan HUANG

2017 Vol.25(2): 110–114    [Abstract] ( 252 )    [RICH HTML ] ( 9 )   [PDF 3535 KB ]( 502 )

Chan-juan MA, Jia-shuo FANG

2017 Vol.25(2): 115–118    [Abstract] ( 225 )    [RICH HTML ] ( 4 )   [PDF 3316 KB ]( 195 )

Lei SHI, Sheng-Xing HUANG, Hui-Feng LIU, Hai-Peng SUN, Su TANG, Yong-Bo GAO

2017 Vol.25(2): 119–122    [Abstract] ( 253 )    [RICH HTML ] ( 4 )   [PDF 2884 KB ]( 257 )

Bing-hui ZENG, Dong-sheng YU

2017 Vol.25(2): 123–128    [Abstract] ( 227 )    [RICH HTML ] ( 1 )   [PDF 935 KB ]( 296 )

Hai CHEN, Yu-ting HUANG, You-hua GAN

2017 Vol.25(2): 129–132    [Abstract] ( 198 )    [RICH HTML ] ( 2 )   [PDF 884 KB ]( 289 )

Jie LIU, Hua TANG

2017 Vol.25(2): 133–136    [Abstract] ( 199 )    [RICH HTML ] ( 2 )   [PDF 857 KB ]( 199 )

Bu-ling WU, Ming CHEN

2017 Vol.25(2): 69–73    [Abstract] ( 376 )    [RICH HTML ] ( 7 )   [PDF 1640 KB ]( 657 )

Minimally invasive root canal therapy should be defined as a discipline which adhere to a concept of preserving the healthy tooth structure as much as possible during all the root canal therapy procedure. In the past 15 years, the concept of minimally invasive has spread and developed fast throughout the diagnosis and treatment of endodontics, which made the root canal therapy (RCT) procedure safer, more accurate and efficient. Minimally invasive endodontics rely on the development of various kinds of therapeutic devices and materials, including the 3D image auxiliary equipment, operation microscope, the NiTi instrument systems and the disinfection and obturation material. Minimally invasive endodontics is a therapeutic concept of the modern root canal therapy which redefined the standard of what a successful RCT is.

Mao-bin YANG, Qian ZENG

2017 Vol.25(2): 74–79    [Abstract] ( 290 )    [RICH HTML ] ( 5 )   [PDF 1070 KB ]( 368 )

Tissue engineering has been applied to induce pulp-dentin complex regeneration, and proposed the concept of regenerative endodontics. As a new subject in stomatology, regenerative endodontics promotes root development and pulp regeneration with the combination of dental stem cells, biomaterial scaffolds and growth factors. Clinically, pulp regenerative technique has been used to treat necrosis and periapical periodontitis of immature permanent teeth. Numerous case reports and studies have proved the possibility of pulp regeneration, and regenerative endodontics will become a potential new treatment alternative of dental pulp diseases for dental clinician. In the present paper, we will summarize and analyze the current process and prospective of regenerative endodontics.

Jia-jun LIU, Yu-kun MENG

2017 Vol.25(2): 80–86    [Abstract] ( 228 )    [RICH HTML ] ( 5 )   [PDF 3219 KB ]( 203 )

Objective To evaluate the influence of different heat treatments on the corrosion behavior of a new Pd-Ag-In-Ga alloy. Methods The corrosion of a new Pd-Ag-In-Ga alloy was tested according to ISO 10271:2001/cor.1:2005(E). Taken as comparison, a commercial high-palladium alloy (Spartan® Plus) was also employed in the study. For electrochemical corrosion test, the open-circuit potential (Eocp) and potentiodynamic polarization curve were recorded and then the electrochemical parameters, namely corrosion potential (Ecorr) and corrosion current density (Icorr) calculated. The surfaces of the specimens that before and after corrosion test were observed by scanning electron microscopy (SEM). Results Both of the high-palladium alloys had lower corrosion tendency and higher corrosion resistance by heat treatment in the ISO 10271 electrochemical corrosion test. For both alloys, heat treatment at 500 ℃ was found to be effective in improving the corrosion resistance as the best datas of electrochemical parameters (Eocp, Ecorr, Icorr) were detected among the four temperature groups. However, no evidence showed that there was significant difference in corrosion resistance between the two alloys. Comparison of surface morphology of the specimens before and after electrochemical experiments by SEM demonstrated that all groups of the two alloys were visible of pitting corrosion and crevice corrosion phenomenon that gradually became less with increasing heat treatment temperature. Horizontal comparing among the groups of the two alloys, no apparent differences in the distribution of pitting and crevice corrosion was found. Conclusin The variation in compositions of high-palladium alloys did not cause significant difference in corrosion behavior due to the identical palladium matrix. The similarity in corrosion behavior among the two high-palladium alloys might be attributed to the predominant palladium content.

Ting LI, Kan CHEN, Ling-li LAN, Xiao-chun REN, Bin-bin YING, Song-song ZHU

2017 Vol.25(2): 87–92    [Abstract] ( 194 )    [RICH HTML ] ( 2 )   [PDF 3902 KB ]( 164 )

Objective To investigate the effects of intra-articular injection of alendronate on the mandibular condyle in ovariectomized rats. Methods Sixty female rats were randomly divided into five groups: ovariectomy with vehicle treatment alone, early alendronate treatment at ovariectomy, late alendronate treatment at 4 weeks after ovariectomy, shamoperation with vehicle treatment, and the normal control rats. The changes in subchondral bone were evaluated by micro-computed tomography (Micro-CT), tartrate-resistant acid phosphatase (TRAP) staining and real-time quantitative polymerase chain reaction (RT-PCR). Results Compared with late alendronate treatment, early alendronate treatment improved microstructural properties of the subchondral bone, with higher bone volume ratio (46.4 + 2.5 vs 37.5 + 2.1; P= 0.038), increased trabecular thickness (47.3 + 1.7 vs 34.6 + 1.4; P = 0.029), elevated trabecular number (8.5 + 0.6 vs 6.2 + 0.3; P = 0.041) and lower trabecular separation (30.2 + 1.6 vs 37.7 + 2.6; P = 0.034). Fewer TRAP-positive cells (4.2 + 0.2 vs 6.8 + 0.4; P = 0.019) and a higher OPG/RANKL ratio (0.38 + 0.01 vs 0.25 + 0.03; P = 0.043) in the subchondral bone were observed in the animals with early treatment group compared to late treatment or ovariectomy/vehicle treatment group. Conclusion Our results suggest the therapeutic potential of intra-articular alendronate injection in the treatment of osteoporosis-associated temporomandibular disorders.

Zhen-xia LI, Ting-ting CHEN, Pei-lin LI, Jing XUE, Qiang ZHANG

2017 Vol.25(2): 93–96    [Abstract] ( 210 )    [RICH HTML ] ( 1 )   [PDF 1570 KB ]( 205 )

Objective To evaluate the tensile bonding strength (TBS) and antibacterial properties when an orthodontic adhesive was added with nanohydroxyapatite (nHAp). Methods Light cure orthodontic adhesive (Grengloo) was blended with 2% TiO2 containing nHAp nanoparticles by 0%、10%、20%、30% (w/w), while the control was not blended with nHAp. Brackets were bonded to extracted premolars by these new adhesives. TBS of 5groups were determined, and the adhesive remnant index (ARI) scores were assessed. Composite discs specimen were prepared, incubated with bacterial suspension for 48 h, and tested for antibacterial properties. Results No significant difference was found in ARI. The colony unit counts and lactate productionof the groups containing 2%TiO2 were significantly reduced. The colony unit counts and lactate production were without relationship with nHAp. The tensile bonding strength drastically decreased when containing more than 10% nHAp. Conclusin nHAp might not enhance the antibacterial effects of Grengloo.

Ke WANG, Guo-guang PENG, Jian-hong PENG, Yu-lian TAN, Lei YANG, Shan-zhi HE, You-yuan WANG

2017 Vol.25(2): 97–100    [Abstract] ( 193 )    [RICH HTML ] ( 7 )   [PDF 1619 KB ]( 187 )

Objective To explore the effects of mouth floor approach intubation in the treatment of jaw fracture combined with skull base injury. Methods From Jan. 2014 to Oct. 2015, 7 cases of jaw fracture combined with skull base injury were selected from Medical center of Stomatology, Foshan Hospital of Traditional Chinese Medicine (FSTCM). All cases were treated with mouth floor approach intubation, because they were not suitable to be given the oral or nasal intubation anesthesia. Results All the patients healed well after operation, and there was no tube accident or other complications. Conclusions For patients of jaw fracture combined with skull base injury, the mouth floor approach intubation could be recommended as a supplementary choice for traditional intubation methods.

Dong-hui WU, Shao-ping CAO, Yun-ying ZHU, Jian-qiang LIANG

2017 Vol.25(2): 101–104    [Abstract] ( 234 )    [RICH HTML ] ( 2 )   [PDF 3040 KB ]( 266 )

Objective To evaluate the effect of palatal free gingiva in anterior maxillary defect restoration after epulis resection. Methods 22 cases were included in this study. Palatal free gingival flap was prepared to restore anterior maxillary defect after epulis resection. Clinical effect was evaluated according to gingival margin, gingival papilla index and modified sulcus bleeding index. Results Satisfactory clinical effect was achieved in all 22 cases, with adequate height, thickness, fullness and texture. Conclusin Palatal free gingival flap was clinically effective in anterior maxillary defect treatment after epulis resection, with satisfactory aesthetic clinical effect.

Ai-qing LIU, Zao CHEN, Ji-dong ZHANG, qiang YUAN

2017 Vol.25(2): 105–109    [Abstract] ( 197 )    [RICH HTML ] ( 2 )   [PDF 3049 KB ]( 213 )

Objective By analyzing changes of dental arch width and length during the aligning and leveling period (non-extraction case) with two kinds of self-locking bracket, compare the difference between the active self-locking bracket with the passive bracket. Methods The data of dental arch perimeter change amount and dental arch width and length change amount (WU/L3, WU/L4, WU/L5, WU/L6, U/LL) were statistically analyzed using the correlation and regression method by comparing active and passive brackets for the correction of dental arch variations. Two different brackets for the correction of the measured values of the dental arch variations was analyzed by t-test. Results There were statistical relationships between the amount of arch perimeter increase and the amount of width and length increase. The regression equation was statistically significant (P < 0.05), It was greater impacted arch width increase to arch perimeter in the self-locking. The t-test results showed WU3, WL3, WL6, LR 4 measured values (P < 0.05) statistically significant in the active self-locking group and passive group. Conclusin Active and passive self-locking bracket have good arch expansion effecting. The active self-locking bracket is slightly dominant than the passive bracket in the expansion of the canine width whereas the active self-locking bracket is better than the passive in the expansion of the mandibular first molar and arch perimeter which should be widely applied to the appropriate cases.

Abdumijiti·Renaguzi, Shi-hao LI, Zi-xian HUANG, Ze-man QIN, Zhi-quan HUANG

2017 Vol.25(2): 110–114    [Abstract] ( 252 )    [RICH HTML ] ( 9 )   [PDF 3535 KB ]( 502 )

Castleman disease is a rare and complicated disease. A case of Castleman disease (CD) in a 40-year-old woman on the neck was reported and literature review was made to understand the occurrence, clinical characteristics, diagnosis and differential diagnosis, treatment, and prognosis of Castleman disease. Because of the rarity of CD, its occurrence in the general population and the typical clinical manifestations are still lacked. There are two types of CD, namely localized CD and multicentric CD, both of them are not easy to be diagnosised. CT scans in preoperative is helpful for the clinical diagnosis, while histopathological examination and lymph node biopsy are beneficial for the early diagnosis. The treatment result is based on the histopathological examination and lymph node biopsy. The prognosis is different with the type of CD. For the localized CD, the prognosis is usually good, while for the multicentric CD is bad. Both of localized CD and multicentric CD have a certain reoccurrence rate.

Chan-juan MA, Jia-shuo FANG

2017 Vol.25(2): 115–118    [Abstract] ( 225 )    [RICH HTML ] ( 4 )   [PDF 3316 KB ]( 195 )

Root canal therapy of mandibular first premolar is challenging for there are some variations in mandibular first premolar root canal. And it is easy to fail when there are some tiny missing root canals. This article reported a mandibular first premolar with apical furcation which was found by the combined application of X-ray and CBCT. This article also focuses on root canal exploration and instrumentation, in order to provide evidence for treatment of mandibular first premolar.

Lei SHI, Sheng-Xing HUANG, Hui-Feng LIU, Hai-Peng SUN, Su TANG, Yong-Bo GAO

2017 Vol.25(2): 119–122    [Abstract] ( 253 )    [RICH HTML ] ( 4 )   [PDF 2884 KB ]( 257 )

Objective To describe a novel workflow for the anterior dental esthetics in immediate implant and immediate aesthetic restoration with digital technique. Methods Before the implant placement, a intra-oral optical scan(IOS) combined with CBCT was performed to virtually design the 3D implant position and restoration. A surgical guide and an individualized Ti abutment restoration was CAD/CAM-fabricated out of the PMMA-based in a fully digital workflow and seated at the stage of minimal invasive surgery. Results The technique achieved immediate implant and immediate restoration after tooth extraction. Immediate restoration of temporary crown could be completed immediately in second patient visit after the operation, finally realized the aesthetic implantation with preserved soft tissue contour. Conclusin The fully digital technique changed the conventional workflow which achieves more efficiency and better aesthetic effect.

Bing-hui ZENG, Dong-sheng YU

2017 Vol.25(2): 123–128    [Abstract] ( 227 )    [RICH HTML ] ( 1 )   [PDF 935 KB ]( 296 )

Circular RNAs (circRNAs) are RNAs with a covalently closed loop structure, characterized by its conservation, stability, tissue specific and ubiquity. CircRNAs can serve as miRNA ‘sponges’ to modulate the mRNA targets of miRNAs. CircRNAs can bind with RNA binding proteins and regulate the expression of some genes. The differential expression of circRNAs between pathogenic and normal tissues makes circRNAs possibly promising biomarkers for diagnosis and targets for treatment. In this article, we reviewed the research progress of circRNA and discussed its research prospects in oral diseases.

Hai CHEN, Yu-ting HUANG, You-hua GAN

2017 Vol.25(2): 129–132    [Abstract] ( 198 )    [RICH HTML ] ( 2 )   [PDF 884 KB ]( 289 )

Three-dimensional finite elemennt method (3-D FEM) is an approach to simulate the intraoral environment by fabricating virtual model in computer software, to provide various options of restorations according to the requirements of study, and finally to give relevant mechanic data for clinical reference by stress analysis. 3-D FEM has been applied in stomatological research more and more widely in recent years. This review has summarized the applications of 3-D FEM in various kinds of dental restorations.

Jie LIU, Hua TANG

2017 Vol.25(2): 133–136    [Abstract] ( 199 )    [RICH HTML ] ( 2 )   [PDF 857 KB ]( 199 )

With the wide use of bisphosphonates in bone diseases such as osteoporosis and bone metastases of malignant tumors, bisphosphonate-related osteonecrosis of the jaw has gained widely attention as a severe side effect. Animal model is a useful way to study bisphosphonate-related osteonecrosis of the jaw, among which rat model is used most usually. This article reviewed the establishment of rat model of bisphosphonate-related osteonecrosis of the jaw and relevant examinations.

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