Group A were cured by Mummification,Group B removed the pulp,root canal filling performed,Combined with phenol-formaldehyde liquid filling root canal.

 
  • 組,采用干髓術(shù);B組去髓后根管治療結合塑化治療。術(shù)后3年、5年對比觀(guān)察其療效。
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