Re: [固綴實驗] post&core
JPD glossary裡面的ferrule定義:
1. a metal band or ring used to fit the root or crown of tooth
2.any short tube or bushing for masking a tight joint
從某篇文章中節錄下來的:
"The ferrule is the ring of metal that goes along the gingival margin of
a crown or a core buildup. It's not a ring of tooth structure. The tooth
structure is removed in order to place a ferrule. The theory is that a
ferrule will help distribute lateral forces and prevent fracture after
you do a post and core."
想想看,如果 P=POST, *=CORE, t=tooth structure, 如下圖
********
********
***PP***
***pp***
tttttPPttttt
tttttPPttttt
tttttPPttttt
C=CROWN,需要有至少1~1.5mm的齒質讓你修一圈之後,假牙才有辦法做出圍繞牙齒一圈
的margin,才能箍住牙齒對吧? 如下圖
CCCCCCCC
C**PP**C
C**pp**C
C**pp**C
CttPPttC
tttttPPttttt
tttttPPttttt
這樣才有辦法對抗lateral force阿~
當然ferrule effect的好處有哪些大家可以查FIX的課本 這邊不多做解釋了
這是我的一點心得跟大家分享
如果有錯煩請糾正 謝謝!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 220.141.47.40
推
05/19 21:45, , 1F
05/19 21:45, 1F
推
05/19 21:51, , 2F
05/19 21:51, 2F
→
05/19 21:59, , 3F
05/19 21:59, 3F
推
05/19 22:03, , 4F
05/19 22:03, 4F
推
05/19 22:09, , 5F
05/19 22:09, 5F
推
05/19 22:11, , 6F
05/19 22:11, 6F
→
05/19 22:12, , 7F
05/19 22:12, 7F
→
05/19 22:13, , 8F
05/19 22:13, 8F
→
05/19 22:13, , 9F
05/19 22:13, 9F
推
05/19 22:23, , 10F
05/19 22:23, 10F
推
05/20 00:15, , 11F
05/20 00:15, 11F
推
05/20 00:57, , 12F
05/20 00:57, 12F
推
05/20 01:30, , 13F
05/20 01:30, 13F
推
05/25 18:57, , 14F
05/25 18:57, 14F
討論串 (同標題文章)
完整討論串 (本文為第 3 之 3 篇)：