犬の下顎体吻側切断術における下顎体間隙に対するバイオセラミックス材の補填〔英文〕  [in Japanese] Bioceramic Implantation in the Intermandibular Space in Bilateral Rostral Mandibulectomy of the Dog  [in Japanese]

Author(s)

Abstract

下顎の第二前臼歯より前方を切断する犬の下顎体吻側切除術において, 補填群には遊離左右下顎体をプレート固定し, 骨切端付近の左右下顎体間隙にhydroxyapatiteとtricalcium phosphateよりなるバイオセラミックス材(セラタイト)を補填した. 対照群としてはプレート固定のみ(固定群), および術後無処置(無処置群)の2群とした. 咀嚼機能不全は補填群で観察されなかったが, 固定群ではドッグフードをウェットタイプよりドライタイプに変更した4週目に観察され, 無処置群ではドッグフードのタイプに関係なく6週まで観察された. X線および組織学的観察において, 補填群は術後12週以後に左右下顎体骨切端間隙に骨性癒合が認められたが, 固定群と無処置群では術後16週においても観察されなかった. この結果は, 下顎体切断術において遊離下顎体のプレート固定に併用したセラタイト補填が遊離下顎体の骨切端間の空間を狭め, これがため新生骨が間隙へ早期に充填され咀嚼機能もより早く快復したと考えられた.

Effect of bioceramic implantation on the intermandibular space along with plating in rostral mandibulectomy was investigated in the dog. In this group, bioceramic beads consisting of a complex of hydroxyapatite and tricalcium phosphate were implanted in the intermandibular space between the lingual surfaces of the fracture ends. In two other groups, the dogs received only plating on the ostectomized end, or they received only rostal mandibulectomy without plating. No difficulty in mastication was observed in the implanted group after surgery. In the dogs which received plating, however, difficulty was noted only in the 4th week when wet food was replaced by dry food, and in the control group in the 6th week after the surgery. From the radiological and microscopical findings, in dogs with only plating or without the fixation there was no bony union in the intermandibular space at 16 weeks, though the increase in fibrous tissue and bony callus in the area was much greater in the plated dogs than in the control group. In the implanted group, on the other hand, the increase in callus formation was considerable compared to the other groups. Moreover, the lingual surfaces of the fracture ends were well ossitied at 12 postoperative weeks. This suggests that in canine bilateral rostral mandibulectomy the stabilization of the fracture ends with plates and bioceramic implants filling a gap in the intermandibular space may enhance the ossification between the fracture ends and prevent postoperative difficulty in mastication.

Journal

  • The Journal of veterinary medical science

    The Journal of veterinary medical science 56(1), p115-119, 1994-02

    Japanese Society of Veterinary Science

Codes

  • NII Article ID (NAID)
    110003915999
  • NII NACSIS-CAT ID (NCID)
    AA10796138
  • Text Lang
    JPN
  • ISSN
    09167250
  • NDL Article ID
    3870070
  • NDL Source Classification
    RB86(畜産--家畜--犬・猫)
  • NDL Source Classification
    ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-350
  • Data Source
    NDL  NII-ELS 
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