Journal of Endodontics
Volume 6, Issue 4 , Pages 506-508, April 1980

Replantation 2. The role of the periodontal ligament

  • Henry J. Van Hassel, DDS, MSD, PhD

      Affiliations

    • Corresponding Author InformationRequests for reprints should be directed to Dr. Van Hassel, Department of Endodontics, University of Washington School of Dentistry, Seattle, 98195.
    • Dr. Van Hassel is associate professor, department of physiology and biophysics, and department of endodontics, University of Washington, and director, endodontic residency program, US Public Health Service Hospital, Seattle.
    • ,
  • Robert J. Oswald, DDS

      Affiliations

    • Dr. Oswald is assistant professur of endodontics, University of Washington School of Dentistry, and research affiliate, Regional Primate Center, Seattle.
    • ,
  • Gerald W. Harrington, DDS, MSD

      Affiliations

    • Dr. Harrington is professor of endodontics, and director, graduate endodontics program, University of Washington School of Dentistry, Seattle.

Maxillary lateral incisors were extracted and then replanted in 24 Macaca fascicularis monkeys. In half the sample the periodontal ligament was removed prior to replantation. In half the teeth it remained intact. Forty-two teeth were observed. Root resorption was evaluated radiographically. Follow-up periods ranged from 16 to 39 months. Thirty-five teeth were still in situ at the longest follow-up period. In those teeth in which the periodontal ligament (PDL) was intact upon replantation, nine of 21 resisted or reversed resorption and were retained with an intact PDL space radiographically demonstrable at the conclusion of follow-up. In contrast, all but one of 21 teeth in which the PDL had been removed prior to replantation evidenced severe resorption.

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 This study was performed at the Regional Primate Center at the University of Washington under National Institutes of Heahh (NIH) Grant RR00166. Funding for the project came from NIH Grant DE 03800-02.

 The views expressed herein are those of the authors and do not necessarily reflect the views of the United States Public Health Service.

PII: S0099-2399(80)80196-8

doi:10.1016/S0099-2399(80)80196-8

Journal of Endodontics
Volume 6, Issue 4 , Pages 506-508, April 1980