The cotton fiber reinforced polyester composites were fabricated with varying amount of graphite fillers (0,3,5 wt.％) with a hand lay-up technique.Wear tests were planned by using a response surface (Box Behnken meth...The cotton fiber reinforced polyester composites were fabricated with varying amount of graphite fillers (0,3,5 wt.％) with a hand lay-up technique.Wear tests were planned by using a response surface (Box Behnken method) design of experiments and conducted on a pin-on-disc machine (POD) test setup.The effect of the weight percentage of graphite content on the dry sliding wear behavior of cotton fiber polyester composite (CFPC) was examined by considering the effect of operating parameters like load,speed,and sliding distance.The wear test results showed the inclusion of 5 wt.％ of graphite as fillers in CFPC increase wear resistance compared to 3 wt.％ of graphite fillers.The graphite fillers were recommended for CFPC to increase the wear resistance of the material.A scanning electron microscope (SEM) was used to study the wear mechanism.To predict the wear behavior of the composite material,comparisons were made between the general regression technique and an artificial neural network (ANN).The conformation test results revealed the predicted wear with the ANN was acceptable when compared with the actual experimental results and the regression mathematical models.展开更多
Anterior cervical decompression and fusion(ACDF)treatment for cervical spondylosis has been more than half a century,and achieved good clinical results.However,with the continuous extension of follow-up time,the fusio...Anterior cervical decompression and fusion(ACDF)treatment for cervical spondylosis has been more than half a century,and achieved good clinical results.However,with the continuous extension of follow-up time,the fusion segment-associated postoperative complications emerged gradually.Reserved cervical stability and activity,the concept of non-fusion was born.As a non-fusion technique,cervical artificial disc replacement(CADR)developed rapidly.With the continuous development of artificial prosthesis materials and design concepts,and specification and proficiency of surgical procedures,CADR has achieved better short and mid-term clinical efficacy than ACDF.Compared with ACDF,the main advantages of CADR are that the postoperative recovery is quick,the activity and stability of cervical vertebra are maintained,the height of cervical intervertebral space is restored,and the stress of adjacent segments and the rate of surgical renovation are reduced.In clinical work,as an emerging technology,CADR requires spine surgeons to control the surgical indications,contraindications,and patients'conditions strictly.This article reviews the research progress of CADR in order to provide new ideas for clinical treatment of cervical spondylosis.展开更多
Nucleus Pulposus(NP)Replacement is a developing surgical methodology for the treatment of pathology related to degeneration of intervertebral discs(IVDs).This article provides necessary context regarding the patholo-g...Nucleus Pulposus(NP)Replacement is a developing surgical methodology for the treatment of pathology related to degeneration of intervertebral discs(IVDs).This article provides necessary context regarding the patholo-gies treated with this technology,the biomechanical structure and function of the IVD,and the procedures this technology aims to replace.Primarily,it provides an overview and discussion of commercial and experimental preformed and in situ curing prosthesis designs reported in the scientific literature and summarizes the results of biomechanical and clinical studies evaluating their efficacy.Contextual and updated information on the most recent research into NP replacement with novel hydrogel and tissue engineering(TE)strategies is described.Replacement of the NP allows for potential improvement in the treatment of degenerative spinal pathologies through minimally invasive surgical techniques.展开更多
文摘The cotton fiber reinforced polyester composites were fabricated with varying amount of graphite fillers (0,3,5 wt.％) with a hand lay-up technique.Wear tests were planned by using a response surface (Box Behnken method) design of experiments and conducted on a pin-on-disc machine (POD) test setup.The effect of the weight percentage of graphite content on the dry sliding wear behavior of cotton fiber polyester composite (CFPC) was examined by considering the effect of operating parameters like load,speed,and sliding distance.The wear test results showed the inclusion of 5 wt.％ of graphite as fillers in CFPC increase wear resistance compared to 3 wt.％ of graphite fillers.The graphite fillers were recommended for CFPC to increase the wear resistance of the material.A scanning electron microscope (SEM) was used to study the wear mechanism.To predict the wear behavior of the composite material,comparisons were made between the general regression technique and an artificial neural network (ANN).The conformation test results revealed the predicted wear with the ANN was acceptable when compared with the actual experimental results and the regression mathematical models.
文摘Anterior cervical decompression and fusion(ACDF)treatment for cervical spondylosis has been more than half a century,and achieved good clinical results.However,with the continuous extension of follow-up time,the fusion segment-associated postoperative complications emerged gradually.Reserved cervical stability and activity,the concept of non-fusion was born.As a non-fusion technique,cervical artificial disc replacement(CADR)developed rapidly.With the continuous development of artificial prosthesis materials and design concepts,and specification and proficiency of surgical procedures,CADR has achieved better short and mid-term clinical efficacy than ACDF.Compared with ACDF,the main advantages of CADR are that the postoperative recovery is quick,the activity and stability of cervical vertebra are maintained,the height of cervical intervertebral space is restored,and the stress of adjacent segments and the rate of surgical renovation are reduced.In clinical work,as an emerging technology,CADR requires spine surgeons to control the surgical indications,contraindications,and patients'conditions strictly.This article reviews the research progress of CADR in order to provide new ideas for clinical treatment of cervical spondylosis.
文摘Nucleus Pulposus(NP)Replacement is a developing surgical methodology for the treatment of pathology related to degeneration of intervertebral discs(IVDs).This article provides necessary context regarding the patholo-gies treated with this technology,the biomechanical structure and function of the IVD,and the procedures this technology aims to replace.Primarily,it provides an overview and discussion of commercial and experimental preformed and in situ curing prosthesis designs reported in the scientific literature and summarizes the results of biomechanical and clinical studies evaluating their efficacy.Contextual and updated information on the most recent research into NP replacement with novel hydrogel and tissue engineering(TE)strategies is described.Replacement of the NP allows for potential improvement in the treatment of degenerative spinal pathologies through minimally invasive surgical techniques.
