The channel lateral pocket or halo region of NMOSFET characterized by interface state R G current of a forward gated diode has been investigated numerically for the first time.The result of numerical analysis demons...The channel lateral pocket or halo region of NMOSFET characterized by interface state R G current of a forward gated diode has been investigated numerically for the first time.The result of numerical analysis demonstrates that the effective surface doping concentration and the interface state density of the pocket or halo region are interface states R G current peak position dependent and amplitude dependent,respectively.It can be expressed quantitatively according to the device physics knowledge,thus,the direct characterization of the interface state density and the effective surface doping concentration of the pocket or halo becomes very easy.展开更多
To provide an anatomical basis for clinical implant esthetics,we evaluated the morphology of the nasopalatine canal（NPC） and analyzed labial and interproximal bone anatomy at the maxillary anterior region.We sought ...To provide an anatomical basis for clinical implant esthetics,we evaluated the morphology of the nasopalatine canal（NPC） and analyzed labial and interproximal bone anatomy at the maxillary anterior region.We sought to investigate the effect of maxillary protrusion and tooth labiolingual inclination on labial bone anatomy in Chinese adults.Three dimensional（3D） images were reconstructed using cone-beam computed tomography（CBCT） images from 80 Chinese subjects and by SimPlant 11.04.The dimensions of the NPC,the thickness and profile of the labial bone,the width and height of the interproximal bone,angle sella-nasion-subspinale（SNA） and angle upper central incisor-nasion,subspinale（U1-NA） were measured.The incisive foramen of the NPC was markedly wider than its nasal foramen.The dimension of its labial bone wall demonstrated an increasing width from the crestal to apical measurements.The labial bone at the maxillary anterior region was rather thin,especially at 3 mm below the cemento-enamel junction（CEJ） and the mid-root level;the profile of the labial bone was more curved at the central incisor,and the interproximal bone became wider and shorter posteriorly.There were significant relationships between maxillary protrusion and labial bone profile,tooth labiolingual inclination and labial bone thickness（P 〈 0.02）.To achieve optimal esthetic outcome of implant,bone augmentation is necessary at the maxillary anterior region.For immediate or early placement at the maxillary anterior region,the implant should be located palatally to reduce labial bone resorption and marginal recession;its apex should be angulated palatally to avoid labial perforation at the apical region.To protect the NPC,implants at the central incisor region should be placed away from NPC.展开更多
Soft tissue seal around the transmucosal region of dental implants is crucial for shielding oral bacterial invasion and guaranteeing the long-term functioning of implants.Compared with the robust periodontal tissue ba...Soft tissue seal around the transmucosal region of dental implants is crucial for shielding oral bacterial invasion and guaranteeing the long-term functioning of implants.Compared with the robust periodontal tissue barrier around a natural tooth,the peri-implant mucosa presents a lower bonding efficiency to the transmucosal region of dental implants,due to physiological structural differences.As such,the weaker soft tissue seal around the transmucosal region can be easily broken by oral pathogens,which may stimulate serious inflammatory responses and lead to the development of peri-implant mucositis.Without timely treatment,the curable peri-implant mucositis would evolve into irreversible peri-implantitis,finally causing the failure of implantation.Herein,this review has summarized current surface modification strategies for the transmucosal region of dental implants with improved soft tissue bonding capacities(e.g.,improving surface wettability,fabricating micro/nano topographies,altering the surface chemical composition and constructing bioactive coatings).Furthermore,the surfaces with advanced soft tissue bonding abilities can be incorporated with antibacterial properties to prevent infections,and/or with immunomodulatory designs to facilitate the establishment of soft tissue seal.Finally,we proposed future research orientations for developing multifunctional surfaces,thus establishing a firm soft tissue seal at the transmucosal region and achieving the long-term predictability of dental implants.展开更多
文摘The channel lateral pocket or halo region of NMOSFET characterized by interface state R G current of a forward gated diode has been investigated numerically for the first time.The result of numerical analysis demonstrates that the effective surface doping concentration and the interface state density of the pocket or halo region are interface states R G current peak position dependent and amplitude dependent,respectively.It can be expressed quantitatively according to the device physics knowledge,thus,the direct characterization of the interface state density and the effective surface doping concentration of the pocket or halo becomes very easy.
文摘To provide an anatomical basis for clinical implant esthetics,we evaluated the morphology of the nasopalatine canal（NPC） and analyzed labial and interproximal bone anatomy at the maxillary anterior region.We sought to investigate the effect of maxillary protrusion and tooth labiolingual inclination on labial bone anatomy in Chinese adults.Three dimensional（3D） images were reconstructed using cone-beam computed tomography（CBCT） images from 80 Chinese subjects and by SimPlant 11.04.The dimensions of the NPC,the thickness and profile of the labial bone,the width and height of the interproximal bone,angle sella-nasion-subspinale（SNA） and angle upper central incisor-nasion,subspinale（U1-NA） were measured.The incisive foramen of the NPC was markedly wider than its nasal foramen.The dimension of its labial bone wall demonstrated an increasing width from the crestal to apical measurements.The labial bone at the maxillary anterior region was rather thin,especially at 3 mm below the cemento-enamel junction（CEJ） and the mid-root level;the profile of the labial bone was more curved at the central incisor,and the interproximal bone became wider and shorter posteriorly.There were significant relationships between maxillary protrusion and labial bone profile,tooth labiolingual inclination and labial bone thickness（P 〈 0.02）.To achieve optimal esthetic outcome of implant,bone augmentation is necessary at the maxillary anterior region.For immediate or early placement at the maxillary anterior region,the implant should be located palatally to reduce labial bone resorption and marginal recession;its apex should be angulated palatally to avoid labial perforation at the apical region.To protect the NPC,implants at the central incisor region should be placed away from NPC.
基金supported by the National Key Research and Development Program of China(2023YFC2412600)the National Natural Science Foundation of China(52271243,52171233,82370924)+4 种基金the NSFC-RFBR Joint Research Scheme(82361138575)the Beijing Nova Program(20230484459)the Beijing Natural Science Foundation(7242173)the Clinical Medicine Plus X-Young Scholars Project of Peking Universitythe Fundamental Research Funds for the Central Universities(PKU2024LCXQ014).
文摘Soft tissue seal around the transmucosal region of dental implants is crucial for shielding oral bacterial invasion and guaranteeing the long-term functioning of implants.Compared with the robust periodontal tissue barrier around a natural tooth,the peri-implant mucosa presents a lower bonding efficiency to the transmucosal region of dental implants,due to physiological structural differences.As such,the weaker soft tissue seal around the transmucosal region can be easily broken by oral pathogens,which may stimulate serious inflammatory responses and lead to the development of peri-implant mucositis.Without timely treatment,the curable peri-implant mucositis would evolve into irreversible peri-implantitis,finally causing the failure of implantation.Herein,this review has summarized current surface modification strategies for the transmucosal region of dental implants with improved soft tissue bonding capacities(e.g.,improving surface wettability,fabricating micro/nano topographies,altering the surface chemical composition and constructing bioactive coatings).Furthermore,the surfaces with advanced soft tissue bonding abilities can be incorporated with antibacterial properties to prevent infections,and/or with immunomodulatory designs to facilitate the establishment of soft tissue seal.Finally,we proposed future research orientations for developing multifunctional surfaces,thus establishing a firm soft tissue seal at the transmucosal region and achieving the long-term predictability of dental implants.
