三重蘆洲價格不貴的牙套 - 牙齒保健
By Ingrid
at 2014-11-22T12:53
at 2014-11-22T12:53
Table of Contents
: 但是....你認為主流fiber post的材質一定有樹脂
: 這是錯的!!
: 現在診所用的應該都是玻璃纖維為主 沒錯!!就是陶瓷的!!
補充下
是的fiber 指的是玻纖
沒記錯的話其實玻纖只有約30%...功能大概就是強化樹脂的強度
70% 大概還是epoxy resin...這個比例太少沒辦法把玻纖黏成一根
: 碳纖維則是第二流行的材料
: 雖然牙醫師不見得會用上個月西德最新的產品、但是也不會用美國過時的技術
: 然後你強調硬不代表一切
: 恭喜你!!你是第10564878612發現這件事的人!!
: 所以才有GP的誕生!!
: 很抱歉!! 就當你是專門研究牙醫的醫工、懂很多
: 但是Harvard DDS, PhD在這塊的人更多!
: .......所以我也很抱歉....你的論點已經被用了幾十年了!
: 活牙或在牙齦上部份、確實是有效力傳導就好
: 一個死去的牙或者是人工材料、能倚靠的就是Bone了
: 如果你發展的是夠硬的樹脂screw再次取代Gold
: 來解決Ti-Screw太硬會斷、Gold-Screw太軔會彎的問題
: ....恭喜你、你發了!!
是的 其實我當初構想就是在找 玻纖跟基質的比例 打亂纖維方向等等
: 但是那是週圍都是能夠有效力傳導的植體、能把力氣轉到骨頭上的東西
: 你似乎忘了Post的四週是個已經沒血沒營養的單純磷酸石
: 他的脆度......數值你應該有研究啦!!
: 總之雖然還算硬但是就是很脆..我也不懂!
: 也就是因為還算硬但是很脆
可以想成破壞強度一樣但彈性變差
: 所以、連玻璃纖維都可能會被咬斷,那可是NYU實驗超過1500Mpa的東西
: 可是很有趣的是....碳纖維1780Mpa、被咬斷的就是牙根了
: 還沒完勒!!金屬更好玩了、有Crown壞的、有根斷的
: 你研究到最後才會發現....夠硬的東西、最後哪裡壞掉的成因是
: Retension+抗彎曲強度+軔度
: 單邊密合、Post夠硬、斷牙根
: 單邊密合、Post太軟、段牙齒
: 不夠密合、Post夠硬、斷牙根
: 不夠密合、Post太軟、斷牙齒
: 完全密合、Post夠硬、沒事
: 完全密合、Post太軟、都有可能、看誰先斷
討論下,你看POST太軟的結果是不是比較好?
我是覺得就PREFORM的POST來講 金屬的retension好像比較差
可能跟熱膨脹係數有關 (冷熱循環)
不知道臨床上整根脫落情況多不多
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牙齒保健
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