Mickey 發問時間: 社會與文化語言 · 1 0 年前

有關牙齒根管治療的paper

拜託,有人可以幫我翻譯嗎?第一次看牙齒的paper.都看不太懂

The choice of an appropriate post material is controversially discussed: fiber reinforced composite posts have been recommended due to their dentin-likeYoung’s modulus. FRC posts allow teeth to flex under applied loads leading to an improved stress distribution between post and dentin. The risk of root fracture should be reduced , but may concentrate stress between cement and endodontic post resulting in loss of adhesion . Further it is argued that a more rigid post would allow less invasive preparations with smaller post diameters and avoid deformation of the entire post–core assembly . Root fractures have been attributed to extreme differences in rigidity of post and root dentin with stress concentrations inside the root . Torbjorner et al. summarize that there is the choice between a low modulus post possibly leading to reparable failures, or a high modulus post with probably later but more irreparable failures.

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  • 1 0 年前
    最佳解答

    選擇什麼樣的根管柱材質才最合適,醫界莫衷一是,有各種正反兩面的意見。有人建議使用纖維強化複合材料(FRC),因為它的楊氏係數與牙本質接近。FRC根管柱使得牙齒在受力時得以彎曲,因此可以改善根管柱與牙本質之間的應力分佈。牙根斷裂的風險可因此而降低,但是也可能因為應力集中在補泥與根管柱之間而喪失黏著力。

    接著有人建議使用較具剛性的根管柱,因為它的直徑較小,放置時的侵入性較低,而且它能夠避免整個根管柱--核心組合體的變形。但是由於根管柱與牙根牙本質的剛性差異過大,使得應力集中在牙根的內部,所以容易造成牙根斷裂。因此Torbjorner等人總結如下,選擇楊氏係數低的根管柱,將來比較可能發生損壞,但是該損壞是可以修復的,選擇楊氏係數高的根管柱,將來比較不容易發生損壞,但是一旦發生損壞就比較難以修復。

    參考資料: self
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