The objective of this study was to expound a novel surgical management technique assisted by patient-specific implants(PSIs)for comminuted fractures of the zygomaticomaxillary complex(ZMC).The aim of this study was to...The objective of this study was to expound a novel surgical management technique assisted by patient-specific implants(PSIs)for comminuted fractures of the zygomaticomaxillary complex(ZMC).The aim of this study was to explore the feasibility of using PSIs to accurately restore and fix comminuted fractures.A male patient with an old ZMC comminuted fracture was used to describe the workflow,technique,and method.Computerassisted surgical simulation was used to determine the optimal plan for the reduction of bone segments prior to surgery.The PSIs were used to accurately guide the surgeon’s position of the bone segments,as planned,during the operation.Oral panoramic films and cephalometric films were taken immediately at 1,3,6,and 12 months after the operation,while computed tomography images of the whole skull were taken immediately,half a year,and one year after the operation.The patient’s follow-up showed that the zygomatic symmetry recovered well post-surgery and the patient was satisfied with the outcome.This new surgical method greatly improved the facial symmetry of this patient.展开更多
It is proved in this paper that NWP systematic forecast errors in the zonal mean circulation are due to the difference in westerly acceleration process during the forecasting period between model and real atmospheres....It is proved in this paper that NWP systematic forecast errors in the zonal mean circulation are due to the difference in westerly acceleration process during the forecasting period between model and real atmospheres. Those forcing factors which evoke the zonal mean wind variation can be split into various linear terms according to the non-acceleration theorem in a primitive equation system,By applying this tech- nique to the diagnosis of the forecast produets of the T42L9 model in January 1992 and in July 1992, it is indicated that the model has the ability to forecast the zonal mean wind to a reasonable extent, but there are still some errors in several places,especially in the upper troposphere and lower strato- sphere in the mid-latitude region as well as near the surface.The results of analysis by employing this scheme reveal the reason responsible for the systematic forecast errors of the zonal mean wind in the model and the possible way of improving it. It is also shown that non-acceleration theorem can be used as an efficient tool to diagnose the physical processes of NWP models.展开更多
Aim: To analyse the epidemiology, aetiology, and surgical management of zygomatic complex (ZMC) fractures in our major trauma centre, and to compare the number and location of fixation points and surgical access in ou...Aim: To analyse the epidemiology, aetiology, and surgical management of zygomatic complex (ZMC) fractures in our major trauma centre, and to compare the number and location of fixation points and surgical access in our patient cohort with the literature. Methods: Retrospective analysis of all operative cases (Open Reduction and Internal Fixation) of zygomatic complex fractures over a one year period (2016). Results: A greater proportion of patients in our cohort (54%) were treated with one-point fixation compared to the literature, with the zygomaticomaxillary (ZM) buttress being the most popular fixation point (90%). ZM buttress and frontozygomatic (FZ) suture were the commonest choices for two-point fixations (70%). Buccal sulcus incision was used for ZM access in all cases. For FZ access, upper blepharoplasty incision was the most common (56%). For infra-orbital margin access, transconjunctival incision was the most common (75%). There was no significant association between number of fixation points and presence of associated injuries, impact of injury, or time to operation. There were no post-operative complications. Conclusion: A greater proportion of patients in our cohort were successfully treated with one point fixation compared to the literature, and fewer patients underwent orbital floor exploration and repair in our cohort compared to the literature. This study highlights the ongoing variation in the surgical management of ZMC fractures.展开更多
文摘The objective of this study was to expound a novel surgical management technique assisted by patient-specific implants(PSIs)for comminuted fractures of the zygomaticomaxillary complex(ZMC).The aim of this study was to explore the feasibility of using PSIs to accurately restore and fix comminuted fractures.A male patient with an old ZMC comminuted fracture was used to describe the workflow,technique,and method.Computerassisted surgical simulation was used to determine the optimal plan for the reduction of bone segments prior to surgery.The PSIs were used to accurately guide the surgeon’s position of the bone segments,as planned,during the operation.Oral panoramic films and cephalometric films were taken immediately at 1,3,6,and 12 months after the operation,while computed tomography images of the whole skull were taken immediately,half a year,and one year after the operation.The patient’s follow-up showed that the zygomatic symmetry recovered well post-surgery and the patient was satisfied with the outcome.This new surgical method greatly improved the facial symmetry of this patient.
文摘It is proved in this paper that NWP systematic forecast errors in the zonal mean circulation are due to the difference in westerly acceleration process during the forecasting period between model and real atmospheres. Those forcing factors which evoke the zonal mean wind variation can be split into various linear terms according to the non-acceleration theorem in a primitive equation system,By applying this tech- nique to the diagnosis of the forecast produets of the T42L9 model in January 1992 and in July 1992, it is indicated that the model has the ability to forecast the zonal mean wind to a reasonable extent, but there are still some errors in several places,especially in the upper troposphere and lower strato- sphere in the mid-latitude region as well as near the surface.The results of analysis by employing this scheme reveal the reason responsible for the systematic forecast errors of the zonal mean wind in the model and the possible way of improving it. It is also shown that non-acceleration theorem can be used as an efficient tool to diagnose the physical processes of NWP models.
文摘Aim: To analyse the epidemiology, aetiology, and surgical management of zygomatic complex (ZMC) fractures in our major trauma centre, and to compare the number and location of fixation points and surgical access in our patient cohort with the literature. Methods: Retrospective analysis of all operative cases (Open Reduction and Internal Fixation) of zygomatic complex fractures over a one year period (2016). Results: A greater proportion of patients in our cohort (54%) were treated with one-point fixation compared to the literature, with the zygomaticomaxillary (ZM) buttress being the most popular fixation point (90%). ZM buttress and frontozygomatic (FZ) suture were the commonest choices for two-point fixations (70%). Buccal sulcus incision was used for ZM access in all cases. For FZ access, upper blepharoplasty incision was the most common (56%). For infra-orbital margin access, transconjunctival incision was the most common (75%). There was no significant association between number of fixation points and presence of associated injuries, impact of injury, or time to operation. There were no post-operative complications. Conclusion: A greater proportion of patients in our cohort were successfully treated with one point fixation compared to the literature, and fewer patients underwent orbital floor exploration and repair in our cohort compared to the literature. This study highlights the ongoing variation in the surgical management of ZMC fractures.
