A new copper strip production technology combined with continuous extrusion and rolling technology was proposed. The roll velocity must first be matched with the continuous extrusion velocity to achieve continuous ext...A new copper strip production technology combined with continuous extrusion and rolling technology was proposed. The roll velocity must first be matched with the continuous extrusion velocity to achieve continuous extrusion and roll forming. The bite condition of continuous extrusion was determined, and the compatibility equation between the roll velocity and parameters such as the extrusion wheel velocity, reduction, and strip size was established through mechanical by plastic theoretical calculations. The finite element model of continuous extrusion and rolling was then established by using the TLJ400 continuous extrusion machine with a roll diameter of 200 mm. The relationship between the continuous extrusion and rolling velocities was determined through numerical simulations by software DEFORM-3D, and the accuracy of compatibility equation of velocity was verified.展开更多
Hippopotamus bites are rare in medical consultations, despite several studies exposing their aggressive character. A case of a hippopotamus bite on the shoulder of a fisherman has been reported. In addition to the ost...Hippopotamus bites are rare in medical consultations, despite several studies exposing their aggressive character. A case of a hippopotamus bite on the shoulder of a fisherman has been reported. In addition to the osteoarticular aspect representing a therapeutic problem, the infectious aspect was marked by sepsis, with a death in less than 48 hours. Based on this observation, a protocol for the initial management of large animal bites was submitted.展开更多
Introduction: One of the most common risks of fixed orthodontic therapy is the evidence of root resorption post orthodontic treatment ranging from mild root blunting to severe root resorption of significant portions o...Introduction: One of the most common risks of fixed orthodontic therapy is the evidence of root resorption post orthodontic treatment ranging from mild root blunting to severe root resorption of significant portions of the root structure. The etiology of apical root resorption is multifactorial but largely depends upon the type of orthodontic tooth movement and treatment duration. Study Objective: The primary aim of this study is to examine the association of external apical root resorption and vertical correction in anterior open bite malocclusions using panoramic radiographs for evaluation. Materials and Methods: Pre-treatment and post-treatment panoramic radiographs of 16 patients with anterior open bite malocclusions were scored to assess root resorption of anterior teeth (U/L 3-3). Initial and final root length and total tooth length for U/L 3-3 were measured on panoramic radiographs in Dolphin imaging. Results: Of the 24 pairs of measurements, 7 had a significant p-value (p Conclusions: A statistically significant amount of root resorption was observed, from pre-treatment to post-treatment radiographs. All mandibular anterior teeth except the mandibular right lateral incisors showed evidence of root resorption.展开更多
BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during or...BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during orthodontic treatment,an immediate pause of orthodontic adjustments is recommended;the treatment can resume when the symptoms are managed and stabilized.CASE SUMMARY This case report presents a patient(26-year-old,female)with angle class I,skeletal class II and TMDs.The treatment was a hybrid of clear aligners,fixed appliances and temporary anchorage devices(TADs).After 3 mo resting and treatment on her TMD,the patient’s TMD symptom alleviated,but her anterior occlusion displayed deep overbite.Therefore,the fixed appliances with TAD were used to correct the anterior deep-bite and level maxillary and mandibular deep curves.After the levelling,the patient showed dual bite with centric relation and maximum intercuspation discrepancy on her occlusion.After careful examination of temporomandibular joints(TMJ)position,the stable bite splint and Invisible Mandibular Advancement appliance were used to reconstruct her occlusion.Eventually,the improved facial appearance and relatively stable occlusion were achieved.The 1-year follow-up records showed there was no obvious change in TMJ morphology,and her occlusion was stable.CONCLUSION TMD screening and monitoring is of great clinical importance in the TMD susceptible patients.Hybrid treatment with clear aligners and fixed appliances and TADs is an effective treatment modality for the complex cases.展开更多
Rationale:Rabies,as an acute viral disease of the mammal’s central nervous system(CNS),with a high mortality rate,is transmitted to humans through the bite of a rabid animals,especially canine and feline.Patient conc...Rationale:Rabies,as an acute viral disease of the mammal’s central nervous system(CNS),with a high mortality rate,is transmitted to humans through the bite of a rabid animals,especially canine and feline.Patient concerns:An Afghan man,aged 50 years was bitten by a fox in a farm around the Qom-Tehran road,Central Iran in 2018.The patient visited the doctor after the bite,however the period between incidence and hospital visit was not established and no indication was given whether the bite site injury was thoroughly washed.The patient was neither referred to the health center for vaccination(post-exposure prophylaxis)nor an effective therapeutic measures was applied.Forty-five days post-exposure,the patient presented with symptoms such as headache,fever,tingling and burning sensation and was referred to the Centers for Disease Control and Prevention(CDC)unit of Qom Provincial Health Center.Diagnosis:Rabies infection.Interventions:Forty-five days after the animal bite,in CDC of Qom Health Center,he received rabies post-exposure prophylaxis treatment and was referred to an infectious diseases physician.Based on the history of animal bites,the patient was classified as probable case of rabies.The clinical symptoms of rabies appeared in patient after hospitalization.Outcomes:Ultimately the patient died in hospital 4 days after hospitalization(50 days after the occurrence of animal bite).After referring the patient to the CDC,the patient’s saliva(0.5-1 mL)was sampled three times every 3-6 hours and tested by PCR.Human rabies was confirmed by Department of Virology in the Pasteur Institute of Iran.Lessons:Physicians and clinicians have responsibilities to be critical in observations and take prompt actions in case of animal bites,as rabies usually develops within 7 to 14 days,and delayed intervention after the onset of symptoms,vaccine and serum injections cannot lead to the survival of the patient.展开更多
The widespread use of long-lasting insecticidal nets (LLINs) is a major intervention method for malaria control. While coverage of LLINs has increased, there is a need for information on the operational effectiveness ...The widespread use of long-lasting insecticidal nets (LLINs) is a major intervention method for malaria control. While coverage of LLINs has increased, there is a need for information on the operational effectiveness of nets deployed in the field in the context of malaria vector resistance to insecticides used for impregnation. The development of specific anti-malarial biomarkers to assess exposure to mosquito bites is an important development in evaluations. The aim of this study was to characterize the human IgG antibody response to Anopheles gSG6-P1 saliva, a salivary peptide antigen previously shown to be a relevant biomarker of human exposure to Anopheles bites, in order to assess the LLINs under field conditions in areas of low and high vector resistance to insecticides. We analyzed data from 240 randomly selected children ( 0.05). Furthermore, the same finding was observed for antibody expression in children whether or not they used LLINs on the day before the survey (p = 0.7724). Similarly, gender and especially age, major factors of variation in the adaptive immune response, did not have a significant effect on IgG expression.展开更多
基金Project(51175055) supported by the National Natural Science Foundation of ChinaProject(201102020) supported by the Natural Science Foundation of Liaoning Province,ChinaProject(2011BAE23B01) supported by the National Key Technology R&D Program of China
文摘A new copper strip production technology combined with continuous extrusion and rolling technology was proposed. The roll velocity must first be matched with the continuous extrusion velocity to achieve continuous extrusion and roll forming. The bite condition of continuous extrusion was determined, and the compatibility equation between the roll velocity and parameters such as the extrusion wheel velocity, reduction, and strip size was established through mechanical by plastic theoretical calculations. The finite element model of continuous extrusion and rolling was then established by using the TLJ400 continuous extrusion machine with a roll diameter of 200 mm. The relationship between the continuous extrusion and rolling velocities was determined through numerical simulations by software DEFORM-3D, and the accuracy of compatibility equation of velocity was verified.
文摘Hippopotamus bites are rare in medical consultations, despite several studies exposing their aggressive character. A case of a hippopotamus bite on the shoulder of a fisherman has been reported. In addition to the osteoarticular aspect representing a therapeutic problem, the infectious aspect was marked by sepsis, with a death in less than 48 hours. Based on this observation, a protocol for the initial management of large animal bites was submitted.
文摘Introduction: One of the most common risks of fixed orthodontic therapy is the evidence of root resorption post orthodontic treatment ranging from mild root blunting to severe root resorption of significant portions of the root structure. The etiology of apical root resorption is multifactorial but largely depends upon the type of orthodontic tooth movement and treatment duration. Study Objective: The primary aim of this study is to examine the association of external apical root resorption and vertical correction in anterior open bite malocclusions using panoramic radiographs for evaluation. Materials and Methods: Pre-treatment and post-treatment panoramic radiographs of 16 patients with anterior open bite malocclusions were scored to assess root resorption of anterior teeth (U/L 3-3). Initial and final root length and total tooth length for U/L 3-3 were measured on panoramic radiographs in Dolphin imaging. Results: Of the 24 pairs of measurements, 7 had a significant p-value (p Conclusions: A statistically significant amount of root resorption was observed, from pre-treatment to post-treatment radiographs. All mandibular anterior teeth except the mandibular right lateral incisors showed evidence of root resorption.
基金Natural Science Foundation of Jiangsu Province, No. SBK2021021787the Major Project of the Health Commission ofJiangsu Province, No. ZD2022025and the Key Project of the Nanjing Health Commission, No. ZKX20048.
文摘BACKGROUND The relation between orthodontic treatment and temporomandibular disorders(TMDs)is under debate;the management of TMD during orthodontic treatment has always been a challenge.If TMD symptoms occur during orthodontic treatment,an immediate pause of orthodontic adjustments is recommended;the treatment can resume when the symptoms are managed and stabilized.CASE SUMMARY This case report presents a patient(26-year-old,female)with angle class I,skeletal class II and TMDs.The treatment was a hybrid of clear aligners,fixed appliances and temporary anchorage devices(TADs).After 3 mo resting and treatment on her TMD,the patient’s TMD symptom alleviated,but her anterior occlusion displayed deep overbite.Therefore,the fixed appliances with TAD were used to correct the anterior deep-bite and level maxillary and mandibular deep curves.After the levelling,the patient showed dual bite with centric relation and maximum intercuspation discrepancy on her occlusion.After careful examination of temporomandibular joints(TMJ)position,the stable bite splint and Invisible Mandibular Advancement appliance were used to reconstruct her occlusion.Eventually,the improved facial appearance and relatively stable occlusion were achieved.The 1-year follow-up records showed there was no obvious change in TMJ morphology,and her occlusion was stable.CONCLUSION TMD screening and monitoring is of great clinical importance in the TMD susceptible patients.Hybrid treatment with clear aligners and fixed appliances and TADs is an effective treatment modality for the complex cases.
文摘目的:探讨Bite Turbo应用于自锁矫治技术中治疗青少年深覆牙合的效果。方法:纳入江门市新会区第二人民医院2020年1月至2021年1月期间收治的70例青少年深覆牙合患者作为研究对象,根据电脑生成随机数字表法分为两组,对照组35例给予3M自锁矫治器+平面导板治疗,观察组35例给予3M自锁矫治器+Bite Turbo治疗。观察并比较两组治疗后的颌骨改变情况及上颌牙齿位置与角度测量结果。结果:治疗后,两组的下齿槽座角(SNB角)、上齿槽座角(SNA角)、上下齿槽座角(ANB角)均较治疗前减小,且观察组均小于对照组(P<0.05)。治疗后,两组的Apg线至上中切牙切缘的垂直距离(Apg-U1距)、上中切牙缘至NA连线垂直距离(U1-NA距)、翼上颌裂后缘至上颌磨牙远中邻面垂直距离(Ptm-U6距)均较治疗前缩小,且观察组均小于对照组(P<0.05)。结论:在采用自锁矫治技术治疗青少年深覆牙合时,应用Bite Tur bo可有效改善牙齿形态,调整上颌牙齿的位置与角度。
基金supported from the Centre for Disease Control&Prevention of Qom,Qom University of Medical Sciences.
文摘Rationale:Rabies,as an acute viral disease of the mammal’s central nervous system(CNS),with a high mortality rate,is transmitted to humans through the bite of a rabid animals,especially canine and feline.Patient concerns:An Afghan man,aged 50 years was bitten by a fox in a farm around the Qom-Tehran road,Central Iran in 2018.The patient visited the doctor after the bite,however the period between incidence and hospital visit was not established and no indication was given whether the bite site injury was thoroughly washed.The patient was neither referred to the health center for vaccination(post-exposure prophylaxis)nor an effective therapeutic measures was applied.Forty-five days post-exposure,the patient presented with symptoms such as headache,fever,tingling and burning sensation and was referred to the Centers for Disease Control and Prevention(CDC)unit of Qom Provincial Health Center.Diagnosis:Rabies infection.Interventions:Forty-five days after the animal bite,in CDC of Qom Health Center,he received rabies post-exposure prophylaxis treatment and was referred to an infectious diseases physician.Based on the history of animal bites,the patient was classified as probable case of rabies.The clinical symptoms of rabies appeared in patient after hospitalization.Outcomes:Ultimately the patient died in hospital 4 days after hospitalization(50 days after the occurrence of animal bite).After referring the patient to the CDC,the patient’s saliva(0.5-1 mL)was sampled three times every 3-6 hours and tested by PCR.Human rabies was confirmed by Department of Virology in the Pasteur Institute of Iran.Lessons:Physicians and clinicians have responsibilities to be critical in observations and take prompt actions in case of animal bites,as rabies usually develops within 7 to 14 days,and delayed intervention after the onset of symptoms,vaccine and serum injections cannot lead to the survival of the patient.
文摘The widespread use of long-lasting insecticidal nets (LLINs) is a major intervention method for malaria control. While coverage of LLINs has increased, there is a need for information on the operational effectiveness of nets deployed in the field in the context of malaria vector resistance to insecticides used for impregnation. The development of specific anti-malarial biomarkers to assess exposure to mosquito bites is an important development in evaluations. The aim of this study was to characterize the human IgG antibody response to Anopheles gSG6-P1 saliva, a salivary peptide antigen previously shown to be a relevant biomarker of human exposure to Anopheles bites, in order to assess the LLINs under field conditions in areas of low and high vector resistance to insecticides. We analyzed data from 240 randomly selected children ( 0.05). Furthermore, the same finding was observed for antibody expression in children whether or not they used LLINs on the day before the survey (p = 0.7724). Similarly, gender and especially age, major factors of variation in the adaptive immune response, did not have a significant effect on IgG expression.
