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Histologic evaluation of retrieved craniofacial implants.

P Bolind1, C Acton, T Albrektsson

  • 1Department of Biomaterials/Handicap Research, Institute for Surgical Sciences, Göteborg University, Gothenburg, Sweden.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|July 13, 2000
PubMed
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This retrieval study analyzed 19 extraoral craniofacial implants. Histologic findings were comparable to intraoral implants, indicating similar osseointegration potential for craniofacial implants.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Biomaterials Science
  • Craniofacial Reconstruction

Background:

  • Extraoral implants in the craniofacial region are utilized for various prosthetic applications.
  • Understanding the long-term stability and histologic characteristics of these implants is crucial for clinical success.
  • Previous retrieval studies have primarily focused on intraoral implants.

Purpose of the Study:

  • To evaluate the clinical and histologic outcomes of retrieved extraoral craniofacial implants.
  • To compare the osseointegration and reasons for removal with intraoral implants.

Main Methods:

  • A retrieval study involving 19 extraoral craniofacial implants from 16 patients.
  • Analysis of implant stability at the time of removal.

Related Experiment Videos

  • Review of loading status (loaded or never loaded) and duration of loading.
  • Documentation of reasons for implant removal.
  • Histologic evaluation of retrieved implant tissues.

    • Main Results:

    • All 19 implants were stable at removal.
    • Five implants were never loaded; 14 had a loading period ranging from 3 months to over 7 years.
    • Reasons for removal included device failure (bone-anchored hearing aid issues), host factors (soft tissue irritation, infection, pain), patient death, treatment plan changes, and scheduled removal.
    • Histologic findings were similar to those reported in intraoral implant retrieval studies.

    Conclusions:

    • Extraoral craniofacial implants can achieve stability comparable to intraoral implants.
    • Histologic outcomes suggest successful osseointegration in the craniofacial region.
    • Reasons for removal are multifactorial, involving both device-related and patient-related factors.