磁性附着体与改良杆卡式附着体对支持组织的应力分布

来源 :临床口腔医学杂志 | 被引量 : 0次 | 上传用户:a348329418
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
目的:探讨磁性附着体与改良杆卡式附着体两种义齿修复单侧游离缺失对支持组织应力分布的影响。方法:分别以磁性、改良杆卡式两种固位形式的附着体义齿修复下颌单侧游离缺失,用三维光弹应力冻结切片技术测试义齿在垂直力、侧向力加载时对基牙和缺牙区牙槽骨应力分布大小。结果:①两种义齿对基牙牙槽骨的应力比较:磁性附着体垂直力明显大于磁性附着体侧向力(P<0.01),磁性附着体垂直力与改良杆卡式附着体垂直力无差别(P>0.05),磁性附着体侧向力小于改良杆卡式附着体侧向力(P<0.05);改良杆卡式附着体垂直力大于改良杆卡式附着体侧向力(P<0.05)。②两种义齿对缺牙区牙槽骨应力比较:磁性附着体垂直力明显大于磁性附着体侧向力(P<0.01),磁性附着体垂直力与改良杆卡式附着体垂直力无差别(P>0.05),磁性附着体侧向力小于改良杆卡式附着体侧向力(P<0.05);改良杆卡式附着体垂直力与改良杆卡式附着体侧向力无差别(P>0.05)。结论:磁固位附着体与改良杆卡式附着体两种义齿都能达到较好的修复效果,垂直力时两种义齿对观测点的应力分布较均匀,并且两种义齿无差别;侧向力的磁性附着体可发生相对移位形成应力中断,相对于杆卡式附着体能够达到更好的应力分布,可以明显降低基牙周围骨组织的应力。 OBJECTIVE: To investigate the effect of two types of dentures with magnetic attachment and modified rod attachment on the stress distribution in the supporting tissue. Methods: The mandibular unilateral mandibular free-standing denture was fixed by two kinds of rehabilitated rod-shaped magnetic attachments and the modified rod-shaped denture. Three-dimensional photoelastic stress freeze-thawing technique was used to test the effect of vertical force and lateral force on abutment and absent Tooth alveolar bone stress distribution size. Results: ① Comparison of stress between the two kinds of dentures on alveolar bone: the vertical force of magnetic attachments was significantly greater than that of magnetic attachments (P <0.01), and there was no difference between the vertical force of magnetic attachments and the vertical force of modified rod attachments (P <0.05). The lateral force of magnetic attachment was less than that of modified card attachment (P <0.05). The vertical force of modified card attachment was greater than that of modified card attachment ). (2) The stress of alveolar bone in two kinds of denture were compared: the vertical force of magnetic attachment was obviously larger than that of magnetic attachment (P <0.01), and there was no difference between the vertical force of magnetic attachment and the vertical force of modified card attachment P> 0.05). The lateral force of the magnetic attachment was less than that of the modified rod attachment (P <0.05). There was no difference between the vertical force of the modified rod attachment and that of the modified rod attachment (P> 0.05). Conclusion: The two kinds of dentures with magnetic retention attachment and modified attachment can achieve better repair effect. The stress distribution of the two kinds of denture to the observation point is more uniform when the vertical force is applied, and there is no difference between the two dentures. The force of magnetic attachment can occur relative displacement of the stress interrupt, compared with the rod clip attachment can achieve better stress distribution, can significantly reduce the stress around the abutment bone tissue.
其他文献
目的比较空心螺钉内固定术与DAA入路内侧支撑钢板辅助空心螺钉内固定术这两种手术方式治疗青壮年垂直不稳定型股骨颈骨折的近期疗效。方法收集2016年4月—2018年2月23例中青
蜂窝夹层结构基板经热真空试验后,其正面局部出现了鼓泡脱粘现象,脱粘形式有2种,一种为聚酰亚胺膜与网格面板脱粘,另一种为网格面板与加强板脱粘。通过对聚酰亚胺膜与网格面
内控制度建设是银行业金融机构健康发展的内部防线,为进一步提高风险管理水平,推动各项业务的顺利开展,长自山农商银行坚持以风险防范为经营管理突破口,强化内控制度建设,构筑风险
艾轩是我国著名的写实油画家,创作了许多展现高原风情的人物作品,在我国八、九十年代众多有代表性的写实油画家里面,艾轩的油画具有独特的风韵,这种独特的绘画风格深深的打动
农村题材影片的衰败,不能归究于简单的投资困难与票房低迷的双重窘境,而是创作者置身事外的盲读或视而不见。缺乏从人类历史的经验中对“乡村价值”的深刻探索,缺乏对城乡空
踩着脚下的硬路花砖,不断映入眼帘的是小桥流水、崭新的砖房、整洁的庭院……走进长春市双阳区齐家镇曙光村,村民那洋溢着幸福和快乐的脸庞,诉说着这里的幸福生活。  曙光村居住的朝鲜族村民有156户,劳动力474人。其中劳务输出人数352人,在韩国打工的就有274人。村民以土地入股形式加入到农民专业合作社,剩余的劳动力就可以到合作社和当地的其他企业进行打工,使村民增收有了多重渠道。曙光村还抓住了民俗村的特
她,没有男人的坚实,却用女人特有的柔韧与细致,将营业室的各项工作安排的有条不紊;她,没有男人的强壮,却用女人纤细的双手、柔弱的肩膀撑起营业室的“一片天”。在2011年短短的一年
目的探究自体结膜移植连续缝合与间断缝合治疗翼状胬肉的临床疗效,并对术后角膜愈合、疼痛以及泪膜稳定性的影响进行分析。方法收集2017年1月-2019年1月实施翼状胬肉切除联合
处方一:生石膏50克,芒硝30克,大青叶40克,板蓝根40克,大黄20克,生地25克,玄参25克,黄连15克,黄芩15克,连翘20克,甘草10克。用于治疗早期温和型猪瘟。按处方配药,将生石膏粉碎为细末与芒硝
中国中西医结合学会肿瘤专业委员会副主任委员,中国临床肿瘤学会(CSCO)理事,CsCO中西医结合专业委员会副主任委员,中国中药协会肿瘤药物研究专业委员会副主任委员,中华中医药