In recent times, research into mandibular fracture has gained momentum from advances in scanning techniques, software/algorithm developments and improvements, and numerical structural modeling using the finite-element...In recent times, research into mandibular fracture has gained momentum from advances in scanning techniques, software/algorithm developments and improvements, and numerical structural modeling using the finite-element method (FEM). In this work, the FEM is used to model a mandibular fracture (using an inhomogeneous and orthotropic jaw model) simulating the effect of different bite tasks/forces on the stability of the fixated fracture. Specifically, bilateral and unilateral clenches (using muscle data) were studied using a low-profile 3D 4 × 2 hole mini-plate deployed for fracture fixation. Here, the mandible bone was treated as orthotropic and spatially inhomogeneous. Although the results of stress and displacement analyses, for this fixation hardware, indicate sufficient fixation under normal biting conditions, the results show that the unilateral and ipsilateral bites develop, in general, the highest stresses or displacements. Such results can guide post-surgery recommendation on bite behavior.展开更多
目的探讨空心无头加压螺钉钛缆张力带内固定术对髌骨骨折(patellar fracture,PF)患者并发症及膝关节功能的影响。方法选取2020年6月至2022年2月平度市第三人民医院收治的92例PF患者作为研究对象,按照随机数字表法分为对照组与观察组,每...目的探讨空心无头加压螺钉钛缆张力带内固定术对髌骨骨折(patellar fracture,PF)患者并发症及膝关节功能的影响。方法选取2020年6月至2022年2月平度市第三人民医院收治的92例PF患者作为研究对象,按照随机数字表法分为对照组与观察组,每组46例。对照组予以克氏针钢丝张力带内固定术治疗,观察组予以空心无头加压螺钉钛缆张力带固定术治疗。比较两组围手术期指标、临床疗效、并发症发生情况、疼痛情况[视觉模拟评分法(visual analogue scale,VAS)评分]、膝关节功能及生命质量[生命质量综合评定问卷(generic quality of life inventory-74,GQOLI-74)评分]。结果两组术中失血量、手术时间及住院时间比较差异无统计学意义;观察组下床活动时间短于对照组,差异有统计学意义(P<0.05)。观察组治疗总有效率为95.65%,高于对照组的82.61%,差异有统计学意义(P<0.05)。观察组并发症发生率为4.35%,低于对照组的19.57%,差异有统计学意义(P<0.05)。治疗后,观察组VAS评分低于对照组,差异有统计学意义(P<0.05)。治疗后,观察组疼痛程度、工作能力、肌萎缩程度、关节活动范围、辅助物使用及积液情况评分均高于对照组,差异有统计学意义(P<0.05)。治疗后,观察组物质生活、社会功能、生理及心理功能评分均高于对照组,差异有统计学意义(P<0.05)。结论空心无头加压螺钉钛缆张力带内固定术治疗PF疗效显著,可缩短患者术后恢复时间,减少并发症发生,减轻术后疼痛,促进膝关节功能恢复,提高患者生命质量,值得临床推广应用。展开更多
文摘In recent times, research into mandibular fracture has gained momentum from advances in scanning techniques, software/algorithm developments and improvements, and numerical structural modeling using the finite-element method (FEM). In this work, the FEM is used to model a mandibular fracture (using an inhomogeneous and orthotropic jaw model) simulating the effect of different bite tasks/forces on the stability of the fixated fracture. Specifically, bilateral and unilateral clenches (using muscle data) were studied using a low-profile 3D 4 × 2 hole mini-plate deployed for fracture fixation. Here, the mandible bone was treated as orthotropic and spatially inhomogeneous. Although the results of stress and displacement analyses, for this fixation hardware, indicate sufficient fixation under normal biting conditions, the results show that the unilateral and ipsilateral bites develop, in general, the highest stresses or displacements. Such results can guide post-surgery recommendation on bite behavior.
文摘目的探讨空心无头加压螺钉钛缆张力带内固定术对髌骨骨折(patellar fracture,PF)患者并发症及膝关节功能的影响。方法选取2020年6月至2022年2月平度市第三人民医院收治的92例PF患者作为研究对象,按照随机数字表法分为对照组与观察组,每组46例。对照组予以克氏针钢丝张力带内固定术治疗,观察组予以空心无头加压螺钉钛缆张力带固定术治疗。比较两组围手术期指标、临床疗效、并发症发生情况、疼痛情况[视觉模拟评分法(visual analogue scale,VAS)评分]、膝关节功能及生命质量[生命质量综合评定问卷(generic quality of life inventory-74,GQOLI-74)评分]。结果两组术中失血量、手术时间及住院时间比较差异无统计学意义;观察组下床活动时间短于对照组,差异有统计学意义(P<0.05)。观察组治疗总有效率为95.65%,高于对照组的82.61%,差异有统计学意义(P<0.05)。观察组并发症发生率为4.35%,低于对照组的19.57%,差异有统计学意义(P<0.05)。治疗后,观察组VAS评分低于对照组,差异有统计学意义(P<0.05)。治疗后,观察组疼痛程度、工作能力、肌萎缩程度、关节活动范围、辅助物使用及积液情况评分均高于对照组,差异有统计学意义(P<0.05)。治疗后,观察组物质生活、社会功能、生理及心理功能评分均高于对照组,差异有统计学意义(P<0.05)。结论空心无头加压螺钉钛缆张力带内固定术治疗PF疗效显著,可缩短患者术后恢复时间,减少并发症发生,减轻术后疼痛,促进膝关节功能恢复,提高患者生命质量,值得临床推广应用。