Page 23 - 根管治療的美麗與哀愁(起承)2020-0422(01)

࣬၍طᐕٙߕᘆၾۑฎ ( ৎeוᇐ )

1. ᜖ഢ࣬၍աՑ၍ኣ˫͉ሯᄴ (dentinal walls) ٙ̍ᔧd݊ɓࡈ܆ௐ (envelope) ٙ٤ගd
ࠅίϤ܆ௐٙᐑྤʫdආБ࣬၍૶௴ᓒ࢝dהԴ͜ʘኜҿၾਗЪɓ֛ึϞהࠢՓdν

Оঐ੄ίաՑ஝ᇍ຅ʕdක௴̈ɓ˪˂ήdԟఱࠅቦ " Ռᅰ༶ਗ "f
2. " Ռᅰ " ݊͟ܘεᎇዚٙᓃdଡ଼ΥৎԸҖϓɓࡈݓձٙϜᇞ (smooth curvature)dɽ࢕ ৎ
ᆞ઄ٙɽᅰኽ୕ࠇה੻ٙᙒۨϜᇞdఱ݊௰Գٙ˾ڌiɦ݄Б࣬၍૶௴ࣛdɓ֛੻ࠅ ᇐ
ί᐀ᆗٙᐑྤ຅ʕආБd̀඲΋ᜫәݹ૰ᆗ᐀၍ഢʘܝdʑঐක֐૶௴ਗЪdה˸त
йਗ਼Ռᅰٙ " Ռ " οɦ̋ɪə˥οࣙdᜊϓ " ଄ "dΪϤᐼ၈މ " ܆଄༶ਗ "f

3. ˫࣬೯ԃٙཀ೻ʕdৰəϞ̙ঐቊ༾Ց݅Ϟ˴ࠅഐ࿴ٙڜᓔdϾ̈ତᔷұʘ̮dՉ၍
ഢ̬մʘ၍ኣһΪ˫͉ሯᄴ (secondary dentin and/or reparative dentin) ٙҖϓdԨڢ
ே݊ᖢ֛ήΣ̬մЪѩʴٙӐጐdΪϤ࣬၍༩ࢰІ್ఱึᎇഹ˫̮࣬Җᜊ੻ᛃᛃϜ

Ϝd၍ഢஷ༸ɰఱһ݊ᄱ॥ʔ஝ۆəd˸ EOM வ၇ᗳЧՌᅰ༶ਗٙ૶௴ਗЪdԸॎ
༆வ၇ᛃᛃϜϜʔ஝ۆٙ࣬၍ኣ݊௰ܦ຅ٙ ( ྡ A9)f
4. ຾͟ EOMd݄ஔ٫ேԴ͜ഹΝᅵٙਗЪίੂБ዁ЪdШ݊͜׵࣬၍૶௴ٙቛ০dӊ
ϣί၍ഢʕהྌཀ၍ኣٙᓃேʔɓᅵdᎇഹவ၇˸ݓд࡝ٙʲۂཀ೻ʕd܆଄༶ਗІ
್Ͼ್ήఱึԱృഹࡡϞٙ࣬၍༩ࢰԐΣd஼နቇܓٙᓒ࢝̈ɓࡈݓձҁߕٙϜᇞf

ྡ A9 ຅ɓᗙૅᔷeɓᗙಃ࣬၍ٙڿਉΫৗࣛdཫᛃቛ০ٙφ၌ձϜᛃ
ஈdʹʝᙃʿ၍ኣהྌཀʲۂٙᎇዚᓃdίᅰࡈԸΫʘܝdІ್Ͼ್ή
ਗ਼၍ഢԱՉࡡϞٙݴΣЪ̈ቇ຅ήක࢝ၾᓒ௴
E. Recapitulation

˸ 3 ˕ቛ০މɓଡ଼ ( ν ISO #15, 20, 25)dί݄Б࣬၍૶௴ၾࡌҖٙཀ೻ʕdʔᓙࠠ

ልԴ͜Ϥଡ଼ቛ০dԱృۃࠑ EOM ٙਗЪ๟ۆdਗ਼ᛃᛃϜϜʔ஝ۆٙ၍ഢdቇܓᓒ࢝̈
ɓࡈঐ੄ڭܵࡡϞ˫࣬ϜᇞݴΣd˲̻๞ೌڜ෦dනл༺ϓ࣬φ၌ͦᅺ፿ܓٙዝ೻f
Recapitulation: is the sequential re-entry and re-use of previously employed
instruments within the root canal. It permits gradual smoothing and tapering of the
preparation at all levels, and frees instruments coronally for controlled shaping apically.

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