Enamel demineralization, the formation of white spot lesions, is a common issue in clinical orthodontic treatment. The appearance of white spot lesions not only affects the texture and health of dental hard tissues but also impacts the health and aesthetics of teeth after orthodontic treatment. The prevention, diagnosis, and treatment of white spot lesions that occur throughout the orthodontic treatment process involve multiple dental specialties. This expert consensus will focus on providing guiding opinions on the management and prevention of white spot lesions during orthodontic treatment, advocating for proactive prevention, early detection, timely treatment, scientific follow-up, and multidisciplinary management of white spot lesions throughout the orthodontic process, thereby maintaining the dental health of patients during orthodontic treatment.
Humans ; Consensus ; Dental Caries/etiology* ; Dental Enamel/pathology* ; Tooth Demineralization/etiology* ; Tooth Remineralization

Objective To clone and fuse the cDNA of human cytokeratin 9 in prokaryotic expression system,and purify and identify the fusion protein.Methods The cDNA fragment of human cytokeratin 9 was amplified from human keratinocyte (HaCaT) total RNA with specific primers.The PCR products were cloned into vector pET-28a,then the fusion protein of his-CK9 was induced by IPTG.The expressed fusion protein of his-CK9 was purified by nickel ion affinity chromatography and identified by SDS-PAGE and Western blot.Results The sequencing proved that the recombinant vector of the cDNA of CK9 was correct.The fusion protein of his-CK9 was induced to be expressed in E.coli.The fusion protein of his-CK9 was highly purified and his-CK9 showed specific binding to the commercialized antibodies of CK9.Conclusion The recombinant vector of pET-28a-CK9 has been successfully constructed,and the fusion protein of his-CK9 has been successfully expressed and purified.

Objective To investigate the effects of repeated intrathecally kinesin superfamily protein 17 (KIF17) antisense oligodeoxynucleotide (ODN) on the expression of mLin10 and NR2B in spinal cord in a mouse model of bone cancer pain.Methods Fifty-six male C3H/HeJ mice,aged 4 ～ 6 weeks,weighting 20 ～ 25 g,were randomly divided into two groups:sham operation group (group S,n=20) and bone cancer pain group (group T,n=36).20μl α-minimal essence medium (α-MEM) which containing 2× 105 NCTC2472 osteosarcoma cells was injected into the intramedullary space of the right femur in group T.In group S,no cancer cell was instead.The number of spontaneous flinches (NSF) and the paw withdrawal mechanical threshold (PWMT) were measured at the day before (base) and the days 4,7,10 and 14 after inoculation.According to the corresponding time points,twenty-four mice were sacrificed for determination the expression of KIF17,mLin10 and NR2B using Western blot.Then,the mice of group T were randomly divided into three groups (n=8,T1,T2,T3,group).In group S and group T1,Saline 5 μl was injected intrathecally.KIF17 sense ODN and antisense ODN,5 μg/5μl were respectively injected in group T2 and T3 for 6 consecutive days.Pain behaviors were assessed at the days 2-6 after the first injection.And determinated the KIF17,mLin10 and NR2B expression,again.Results Compared with group S,the NSF was increased and the PWMT was decreased at the days 7,10 and 14 after inoculation in group T (P＜0.05).Compared with the base ((0.65±0.15),(1.06±0.06),(1.01±0.14)),the expression of KIF17,mLin10 and NR2B (14d:(1.13 ±0.06),(2.17 ± 0.37),(1.85 ± 0.32)) were increased at the days 7,10 and 14 after inoculation in group T(P＜0.05).During the course of the injection,compared with group T1 and T2,the NSF was decreased and the PWMT was increased significantly in the group T3(P＜0.05),the expression of KIF17,mLin10 and NR2B((0.88±0.08),(0.96±0.11),(1.03±0.08)) were reduced in group T3 (P＜0.05).Conclusion Intrathecal KIF 17 antisense ODN in the mice of bone cancer pain improves the pain behaviors,and inhibits the up-regulated of KIF17,mLin10 and NR2B during the course of the injection.

Objective To quantitatively study right ventricular function in the normal second and third trimester fetuses by M-mode tricuspid annular displacement(TAD).Methods TAD was measured using conventional M-mode echocardiography on 161 normal second and third trimester fetuses with gestation age (GA) between 19-38 weeks,meanwhile multiple parameters for evaluating right ventricular function were obtained using pulsed Doppler echocardiography (PW) and myocardial Dopple tissue imaging (DTI).The correlation between TAD and other parameters were analyzed using SPSS 17.0.Results In normal second and third trimester fetuses,the TAD was (9.38 ± 1.71)mm with a range of 5.79-13.90 mm,and was increased with the growth of GA.TAD was correlated with GA,E,A,Em,Am and Sm significantly (r =0.759,0.547,0.320,0.497,0.483 and 0.598 respectively,all P ＜0.001).TAD was not correlated with HR(P ＞0.05).TAD showed differences between the second trimester fetuses and the third trimester fetuses (P ＜ 0.05).Conclusions In normal second and third trimester fetuses,the TAD is increased with the growth of GA,and has good correlation with GA,E,A,Em,Am and Sm respectively,and may become a new promising modality to evaluate function of RV simply and accurately.The technique will be propitious to use in hospitals (without DTI) because of simplicity of operator and lower requirement on the technology and equipment precision.

Aim To explore the effects of clausenamide(Clau) on hippocampal heme oxygenase(HO-1 and HO-2) expressions in diabetic rats.Methods The diabetic rats model was produced by injecting streptozotocin (48 mg?kg-1). After 3 months,the HO-1 and HO-2 mRNA and protein expressions in hippocampus of diabetic rats were detected by RT-PCR and immunohistochemistry respectively.Results ① The results of RT-PCR showed that the protein expressions of HO-1 and HO-2 mRNA in hippocampus of diabetic group were higher than those of control group(P