Evidence-based orthodontics has developed rapidly in recent years, but the lack of a good quality, clinical evidence base is a problem for orthodontic practice. All orthodontists should keep the concept of evidence-based medicine in mind during patient-oriented practice. This would help us to improve our practice and to make the best clinical decisions.
Evidence-based dentistry has been established for more than a decade, and described as ‘the conscientious, explicit and judicious use of current best evidence in making decisions about the care of individual patients＇. However, Orthodontic clinicians in China still tend to base their treatment protocols on the ‘it works in my hands＇evidence provided by their peers, mainly due to their weak experience in searching and applying clinical evidences. In this article, authors are willing to share their experience with their Chinese peers, and to promote the dissemination and application of evidence-based orthodontics in clinical practice.
Objective Compare and analyze the value of β-hydroxybutyrate from two kinds of blood ketone instruments (Optium Xceed blood ketone body instrument from American Abbott laboratories and TBS-1 blood ketone body instrument from Beijing Yicheng company), and provide instructions for clinical applications. Methods Select 7 children patients with epilepsy which have a response to ketogenic diet. The two kinds of blood ketone instruments were used to test blood ketone value of whole blood synchronously in five different periods, and compare the 70 results. Results The measuring results obtained from these two kinds of blood ketone body instruments have statistical difference significantly. The value acquired from TBS-1 blood ketone body instrument is lower than that from Optium Xceed blood ketone body instrument. Measurements using a paired t test, the value of t=12.14, P<0.01. The results from two kinds of blood ketone body instruments are statistically significant. Conclusion The values from 2 kinds of blood ketone instruments are different, which would influence the clinical judgment. At present, the key problem is that there is lack of special blood ketone measure technology for patients with ketogenic diet. How to improve the measure accuracy of high-level blood ketone value remains the future work.
Objective Lots of metal ions accumulation and over-expression of receptor activator of NF-κB l igand (RANKL) around the prosthesis could be found in revision of total hip arthroplasty. To investigate the relationship between metal ions and aseptic loosening by observing the effects of Co2+ and Cr3+ ions on the expression of RANKL and osteoprotegerin(OPG) from osteoblast. Methods Osteoblasts were cultured in vitro at the density of 1 × 105 cells/mL, and were divided into 2 groups according to different culture solutions. In control group, osteoblasts were cultured with normal medium without CoCl2 and CrCl3. In experimental group, osteoblasts were cultured with the medium including CoCl2 (10 mg/ L) and CrCl3 (150 mg/L) solutions. The RT-PCR and ELISA methods were appl ied to detect the mRNA expression of RANKL and OPG and protein level at 24 and 48 hours after co-cultured, respectively. Results RT-PCR revealed that the mRNA expression of RANKL and OPG could be found in two groups at 24 and 48 hours after co-cultured, the expression was higher in the experimental group than in control group, especially the expression of RANKL, showing significant difference (P lt; 0.05). At 24 and 48 hours after co- cultured, the ratios of RANKL mRNA to OPG mRNA in the experimental group were 0.860 and 1.232, respectively, which were significantly higher than those in the control group (0.695 and 0.688,P lt; 0.05). ELISA revealed that the protein level of RANKL and OPG in experimental group were significantly higher than those in the control group (P lt; 0.05). Conclusion Co2+ and Cr3+ can stimulate the mRNA expressions of RANKL, OPG and secretion of those protein from osteoblasts, especially increase of the RANKL, which promotes the formation and activation of osteoblasts and the generation of aseptic loosening.
Objectives To systematically review the relationship between indoor decoration and childhood leukemia in China. Methods CNKI, WanFang Data, VIP, CBM, PubMed, EMbase and The Cochrane Library databases were electronically searched to obtain case-control studies of the relationships between indoor decoration and childhood leukemia from inception to December 2016. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Then, meta-analysis was performed by using RevMan 5.3 software. Results A total of 13 studies involving 1 727 cases and 2 468 controls were included. The results of meta-analysis showed that indoor decoration could increase the risk of childhood leukemia in China (OR=2.69, 95%CI 1.82 to 3.98, P<0.000 01). Conclusions The current evidence suggests that indoor decoration is a risk factor for childhood leukemia in Chinese. Due to limited quality and quantity of the included studies, more high-quality studies are required to verify above conclusions.