Epoxy resin/polytetrafluorethylene coating TiNi arch wires have been fabricated by dipping method.The vickers hardness,adhesion force,the maximum static friction force and biocompatibility also have been examined.The ...Epoxy resin/polytetrafluorethylene coating TiNi arch wires have been fabricated by dipping method.The vickers hardness,adhesion force,the maximum static friction force and biocompatibility also have been examined.The results show that the vickers hardness,adhesion force and the maximum static friction force increase with the increase of the content of epoxy resin.And the epoxy resin/polytetrafluorethylene coatings are nontoxic.展开更多
The arch wire(AW)plays an important role in providing continuous force,aligning the teeth,and excellent dental arch stability for orthodontic treatment.However,the high friction performance of the AW surface can incre...The arch wire(AW)plays an important role in providing continuous force,aligning the teeth,and excellent dental arch stability for orthodontic treatment.However,the high friction performance of the AW surface can increase bacterial adhesion and colonization,leading to oral hygiene problems.Herein,a simple method is developed to modify the surface of the orthodontic wire with a poly(vinyl alcohol)(PVA)hydrogel coating,which can improve the lubricity and antibacterial adhesion of the AW and prevent the oral hygiene problems caused by itself.The PVA hydrogel coating can toughly adhere to the surface of the AW and remarkably reduce the friction performance of the AW,and then its friction coefficient in water can reach 0.005.Under the action of brushing and bending,the PVA hydrogel coating possesses superior ultralubrication and hardly affects the mechanical properties of the stainless-steel substrate.Moreover,the PVA hydrogel coating can significantly inhibit bacterial adhesion on the surface of the AW,thereby reducing bacterial colonization and maintaining oral hygiene while correcting the shape of the mouth and jaw.Therefore,the PVA hydrogel coating exhibits tough adhesion and good antibacterial adhesion while maintaining the mechanical properties of the AW,and it is a promising antifouling coating for improving the performance of the AW.展开更多
Objective: to compare the clinical effect of invisible appliance without bracket and straight wire appliance in the treatment of malocclusion secondary to adult periodontitis. Methods: in this study, 70 adult patients...Objective: to compare the clinical effect of invisible appliance without bracket and straight wire appliance in the treatment of malocclusion secondary to adult periodontitis. Methods: in this study, 70 adult patients with malocclusion secondary to periodontitis were selected from our hospital from August 2020 to August 2021, and 35 of them were evenly divided into the control group treated with straight wire arch appliance and the research group treated with invisible appliance without bracket. Record relevant data generated between groups for comparison. Results: after statistical comparison of treatment effect and periodontal health index, it was found that there was no difference in treatment effect between the reference group and the study group (P > 0.05), but periodontal health was lower than the study group (P < 0.05). Conclusion: in the treatment of adult malocclusion secondary to periodontitis, the effect of the invisible appliance without bracket is similar to that of the straight wire appliance, but the former has higher maintenance of periodontal health than the latter, and has higher applicability and popularization.展开更多
文摘Epoxy resin/polytetrafluorethylene coating TiNi arch wires have been fabricated by dipping method.The vickers hardness,adhesion force,the maximum static friction force and biocompatibility also have been examined.The results show that the vickers hardness,adhesion force and the maximum static friction force increase with the increase of the content of epoxy resin.And the epoxy resin/polytetrafluorethylene coatings are nontoxic.
基金Excellent Youth Fund Project of Henan Natural Science Foundation(Grant No.202300410166)the National Natural Science Foundation of China(Grant No.22202051)+2 种基金the Major Project of WIUCAS(Grant Nos.WIUCASQD2021004 and WIUCASQD2021035)the Project of Wenzhou Key Lab(Grant No.2021HZSY0069)the Science Foundation of Oujiang Laboratory(Grant No.OJQDSP2022018)。
文摘The arch wire(AW)plays an important role in providing continuous force,aligning the teeth,and excellent dental arch stability for orthodontic treatment.However,the high friction performance of the AW surface can increase bacterial adhesion and colonization,leading to oral hygiene problems.Herein,a simple method is developed to modify the surface of the orthodontic wire with a poly(vinyl alcohol)(PVA)hydrogel coating,which can improve the lubricity and antibacterial adhesion of the AW and prevent the oral hygiene problems caused by itself.The PVA hydrogel coating can toughly adhere to the surface of the AW and remarkably reduce the friction performance of the AW,and then its friction coefficient in water can reach 0.005.Under the action of brushing and bending,the PVA hydrogel coating possesses superior ultralubrication and hardly affects the mechanical properties of the stainless-steel substrate.Moreover,the PVA hydrogel coating can significantly inhibit bacterial adhesion on the surface of the AW,thereby reducing bacterial colonization and maintaining oral hygiene while correcting the shape of the mouth and jaw.Therefore,the PVA hydrogel coating exhibits tough adhesion and good antibacterial adhesion while maintaining the mechanical properties of the AW,and it is a promising antifouling coating for improving the performance of the AW.
文摘Objective: to compare the clinical effect of invisible appliance without bracket and straight wire appliance in the treatment of malocclusion secondary to adult periodontitis. Methods: in this study, 70 adult patients with malocclusion secondary to periodontitis were selected from our hospital from August 2020 to August 2021, and 35 of them were evenly divided into the control group treated with straight wire arch appliance and the research group treated with invisible appliance without bracket. Record relevant data generated between groups for comparison. Results: after statistical comparison of treatment effect and periodontal health index, it was found that there was no difference in treatment effect between the reference group and the study group (P > 0.05), but periodontal health was lower than the study group (P < 0.05). Conclusion: in the treatment of adult malocclusion secondary to periodontitis, the effect of the invisible appliance without bracket is similar to that of the straight wire appliance, but the former has higher maintenance of periodontal health than the latter, and has higher applicability and popularization.
