Open oro-nasal defects resulting after oral tumor resection need structural and functional rehabilitation using dental prostheses. Conventional removable prostheses have usually been indicated and performed for prosth...Open oro-nasal defects resulting after oral tumor resection need structural and functional rehabilitation using dental prostheses. Conventional removable prostheses have usually been indicated and performed for prosthodontics. When the patient has an edentulous maxilla, the unfavorable stability of the prosthesis will cause dysfunction of mastication and pronunciation. To achieve improvement of the impaired functional situation, implant-supported full fixed prostheses (IPSPs) for the edentulous maxilla with a removable obturator offer a reasonable solution. We present herein the case of a 70-year-old Japanese man who has presented with oro-nasal defect due to surgical procedures for oral cancer. He was treated with implant-supported full fixed prostheses in a conventional two-step procedure. After prosthesis treatment, a palatal obturator was set. The patient has shown no clinical or radiological evidence of failure as of 24 months after the end of treatment. Functional evaluation of mastication and pronunciation showed dramatic improvements. For a patient with an edentulous maxilla and palatal fistula, full-arch fixed prostheses supported by a combination of axially and non-axially positioned implants and a removable oro-nasal obturator, using the anterior alveolar bone, without bone transplantation or maxillary sinus elevation, could offer an effective, minimally invasive treatment alternative.展开更多
With the continuous deepening of reform and opening up,the gap between urban and rural areas continues to widen,and many farmers in rural areas have chosen to work in cities in order to get out of poverty. At the same...With the continuous deepening of reform and opening up,the gap between urban and rural areas continues to widen,and many farmers in rural areas have chosen to work in cities in order to get out of poverty. At the same time,in the context of the policy of precise poverty alleviation and rural rejuvenation,various helping and supporting measures for rural areas have also emerged. Supporting education in universities is one of the most important ones. With the Graduate Teaching Fellowship of Huazhong Agricultural University and the students and parents in the teaching sites as research objects,the impact of labor mobility and fixed-position supporting education in rural areas on rural families was explored in this paper using economics,sociology and other relevant theories and analytical methods. The results showed that labor mobility can promote the increase of rural household economic income. Outbound industries and regions have a major impact on the entire family development. However,the outflow of labor can also lead to various problems such as staying behind. The fixed-position supporting education in colleges and universities can,on the one hand,promote the improvement of the academic performance of the students in the teaching areas. On the other hand,it can help students develop good habits. Fixed-position supporting education of colleges and universities can be seen as a way to make up for the outflow of labor in rural areas. Combining the flow of labor force with the teaching support of colleges and universities can better promote the development of the entire family of farmers in rural areas.展开更多
Methacrylic acid first was neutralized with an aqueous solution of NaOH to pH = 6.0 similar to 7.0, vinylene carbonate (VCA) was added to the solution, then monomers were copolymerized in paraffin oil by means of reve...Methacrylic acid first was neutralized with an aqueous solution of NaOH to pH = 6.0 similar to 7.0, vinylene carbonate (VCA) was added to the solution, then monomers were copolymerized in paraffin oil by means of reverse-phase suspension polymerization and hydrophilic copolymeric supports were prepared. The properties of the supports were determined using trypsin and results show that the amount of enzymes coupled to the supports and the specific activity of immobilized trypsin are related to the content of VCA structure units, reaction time and concentration of enzyme solution, etc.展开更多
文摘Open oro-nasal defects resulting after oral tumor resection need structural and functional rehabilitation using dental prostheses. Conventional removable prostheses have usually been indicated and performed for prosthodontics. When the patient has an edentulous maxilla, the unfavorable stability of the prosthesis will cause dysfunction of mastication and pronunciation. To achieve improvement of the impaired functional situation, implant-supported full fixed prostheses (IPSPs) for the edentulous maxilla with a removable obturator offer a reasonable solution. We present herein the case of a 70-year-old Japanese man who has presented with oro-nasal defect due to surgical procedures for oral cancer. He was treated with implant-supported full fixed prostheses in a conventional two-step procedure. After prosthesis treatment, a palatal obturator was set. The patient has shown no clinical or radiological evidence of failure as of 24 months after the end of treatment. Functional evaluation of mastication and pronunciation showed dramatic improvements. For a patient with an edentulous maxilla and palatal fistula, full-arch fixed prostheses supported by a combination of axially and non-axially positioned implants and a removable oro-nasal obturator, using the anterior alveolar bone, without bone transplantation or maxillary sinus elevation, could offer an effective, minimally invasive treatment alternative.
文摘With the continuous deepening of reform and opening up,the gap between urban and rural areas continues to widen,and many farmers in rural areas have chosen to work in cities in order to get out of poverty. At the same time,in the context of the policy of precise poverty alleviation and rural rejuvenation,various helping and supporting measures for rural areas have also emerged. Supporting education in universities is one of the most important ones. With the Graduate Teaching Fellowship of Huazhong Agricultural University and the students and parents in the teaching sites as research objects,the impact of labor mobility and fixed-position supporting education in rural areas on rural families was explored in this paper using economics,sociology and other relevant theories and analytical methods. The results showed that labor mobility can promote the increase of rural household economic income. Outbound industries and regions have a major impact on the entire family development. However,the outflow of labor can also lead to various problems such as staying behind. The fixed-position supporting education in colleges and universities can,on the one hand,promote the improvement of the academic performance of the students in the teaching areas. On the other hand,it can help students develop good habits. Fixed-position supporting education of colleges and universities can be seen as a way to make up for the outflow of labor in rural areas. Combining the flow of labor force with the teaching support of colleges and universities can better promote the development of the entire family of farmers in rural areas.
文摘Methacrylic acid first was neutralized with an aqueous solution of NaOH to pH = 6.0 similar to 7.0, vinylene carbonate (VCA) was added to the solution, then monomers were copolymerized in paraffin oil by means of reverse-phase suspension polymerization and hydrophilic copolymeric supports were prepared. The properties of the supports were determined using trypsin and results show that the amount of enzymes coupled to the supports and the specific activity of immobilized trypsin are related to the content of VCA structure units, reaction time and concentration of enzyme solution, etc.
