Periodontal biomechanics: finite element simulations of closing stroke and power stroke in equine cheek teeth
Periodontal biomechanics: finite element simulations of closing stroke and power stroke in equine cheek teeth
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DOI：
10.1186/1746-6148-8-60
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发表时间：
2012-05-20
影响因子：
2.6
通讯作者：
Staszyk, Carsten
中科院分区：
文献类型：
--
作者：
Cordes, Vanessa;Luepke, Matthias;Staszyk, Carsten
背景：在马牙科牙周病，特别是根尖周炎，是经常发生的问题。据信，毛发脱落是这种疾病发展的最常见原因。尽管如此，仍然没有得到证实的解释，为什么定居的病原微生物发生在马牙周组织。据估计，过度的应变和应力发生在牙周膜（PDL）在马的咀嚼周期可能是一个诱发因素。在这项研究中，这一假设进行了检查的有限元（FE）分析的虚拟3-D模型的马上颌骨和下颌颊齿，建立在mu CT数据集的基础上。结果：在闭合冲程时，牙周膜的低应力和应变能密度（SED）分布均匀，而在做功冲程时，牙周膜的高应力和SED分布在牙槽嵴附近和根尖周。在动力冲程期间，PDL的这些特定区域中的力集中可能导致局部组织坏死和炎症，从而为微生物的定居建立合适的环境。
Background: In equine dentistry periodontal diseases, especially periapical inflammation, are frequently occurring problems. Anachoresis is believed to be the most common cause for the development of such disorders. Nevertheless, there is still no substantiated explanation why settlement of pathogen microorganisms occurs in equine periodontal tissues. It is expected that excessive strains and stresses occurring in the periodontal ligament (PDL) during the horse's chewing cycle might be a predisposing factor. In this study this assumption was examined by finite element (FE) analyses on virtual 3-D models of equine maxillary and mandibular cheek teeth, established on the basis of mu CT datasets. Calculations were conducted both under conditions of closing and power stroke.Results: Results showed a uniform distribution of low stresses and strain energy density ( SED) during closing stroke, whereas during power stroke an occurrence of high stresses and SED could be observed in the PDL near the alveolar crest and in periapical regions.Conclusion: The concentration of forces during power stroke in these specific areas of the PDL may cause local tissue necrosis and inflammation and thus establish a suitable environment for the settlement of microorganisms.