Fatigue of Dental Implants

种植牙疲劳

• 批准号: 7187280
• 负责人: JASON A GRIGGS
• 金额: $ 5万
• 依托单位: TEXAS A&M UNIVERSITY HEALTH SCIENCE CTR
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7187280
• 关键词: Acceleration; Affect; American; Behavior; Bone Resorption; Caliber; Caring; Cementation; Communities; Data; Dental; Dental Implants; Dentists; Edentulous Mouth; Elements; Failure; Fatigue; Fracture; Frequencies; Future; Goals; Health; Height; Implant; Implantation procedure; In Vitro; Individual; Laws; Location; Log-Linear Models; Mandible; Mechanical Stress; Mechanics; Methods; Modeling; Neck; Numbers; Patients; Plastics; Population; Probability; Prosthesis; Range; Reporting; Research Personnel; Sampling; Shapes; Specific qualifier value; Specimen; Standards of Weights and Measures; Stress; Stress Fractures; Stress Tests; Testing; Time; Titanium; Tooth structure; alveolar bone; base; concept; design; edentulism; experience; improved; programs; research study; simulation

DESCRIPTION (provided by applicant): Although dental implants are not yet the standard of care for edentulous patients, the use of this treatment option is rapidly increasing. The number of implants placed in the US increased by a factor of ten from 1983 to 2002 with $150 million of implant products sold to North American dentists in 2002. In the absence of implant placement, edentulism poses a serious health concern for US citizens. Without a tooth or implant to transfer loading to the alveolar bone, patients experience bone resorption with an average decrease of 4 mm in mandibular height within one year. It has been suggested that with proper treatment, achieving stable biointegration is no longer the primary factor limiting the lifetimes of implants. Fatigue fracture of the implant or the prostheses supported by the implant due to mechanical factors is a more prevalent cause of failure. Implant body diameter, prosthesis cementation method, and implant-abutment connection design have all been reported to significantly affect abutment screw loosening and fracture. It is clear that the dental implant community would benefit from systemic comparisons of implant designs, but such studies are not feasible without more efficient fatigue testing methods. The following specific aims are focused around our central goal of developing an efficient method for testing reliability of dental implants: 1) Correlate the results of finite element stress analysis to the fracture origin observed on physical specimens. 2) Verify the accuracy of step-stress method for estimating the mechanical reliability of dental implants over time. 3) Determine an acceleration factor to allow conversion between fatigue data collected at different cyclic frequencies. In lay terms, this project will enable future researchers to improve dental products by faster methods.

描述（由申请人提供）：尽管牙科植入物尚未成为厌食症患者的护理标准，但这种治疗选择的使用正在迅速增加。从1983年到2002年，美国植入物的数量增加了10倍，并于2002年出售给北美牙医的1.5亿美元植入物。在没有植入物的情况下，eDentulism对美国公民带来了严重的健康问题。如果没有牙齿或植入物将负荷转移到牙槽骨上，患者会在一年内平均下颌高度降低4 mm。已经提出，通过适当的治疗，实现稳定的生物整合不再是限制植入物生命的主要因素。由于机械因素而导致的植入物或植入物支撑的假体的疲劳断裂是失败的更为普遍原因。据报道，植入物体直径，假体胶结法和植入物态连接设计都显着影响基台螺钉松动和断裂。显然，牙科植入物社区将受益于植入物设计的系统性比较，但是如果没有更有效的疲劳测试方法，此类研究是不可行的。以下特定目标集中在我们开发一种有效测试牙科植入物可靠性的方法的核心目标上：1）将有限元压力分析的结果与在物理标本上观察到的断裂起源相关联。 2）验证随着时间的推移估算牙科植入物的机械可靠性的阶压法的准确性。 3）确定一个加速因子，以允许在不同循环频率收集的疲劳数据之间转换。简而言之，该项目将使未来的研究人员通过更快的方法改善牙科产品。