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Pulp changes after anterior mandibular subapical osteotomy in a primate model.

P Banks

    Journal of Maxillofacial Surgery
    |February 1, 1977
    PubMed
    Summary

    Subapical osteotomy of the anterior mandible in monkeys caused progressive pulp damage and fibrosis in all teeth. Some teeth distal to the osteotomy site also showed pulp damage, unlike control teeth.

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    Area of Science:

    • Oral and Maxillofacial Surgery
    • Dental Research
    • Primate Models in Surgery

    Background:

    • Subapical osteotomies are surgical procedures involving bone cuts below the tooth roots.
    • Assessing the pulpal health of teeth following mandibular osteotomies is crucial for long-term dental viability.
    • Open bite deformities may influence surgical outcomes and subsequent pulpal responses.

    Purpose of the Study:

    • To histologically evaluate the pulpal tissue response in Macaca Irus monkeys after subapical anterior mandibular osteotomy.
    • To determine the long-term effects of this surgical procedure on dental pulp vitality and structure.
    • To investigate potential differences in pulpal response related to the presence or absence of an open bite.

    Main Methods:

    • Subapical anterior mandibular osteotomy performed on 10 adult Macaca Irus monkeys.
    • Teeth were extracted at predetermined intervals: 8 weeks, 12 weeks, 24 weeks, and 1 year post-surgery.
    • Histological examination of dental pulp tissue to assess structural changes and vascularity.
    • Control teeth from the opposing jaw were analyzed for comparison.

    Main Results:

    • No instances of normal pulpal tissue were observed in any of the operated teeth.
    • Progressive fibrosis and calcification were consistent findings in all examined pulps.
    • Patent pulp blood vessels were identified up to 24 weeks post-surgery.
    • Pulp damage occurred in 50% of teeth located distal to the osteotomy site.
    • Control teeth consistently exhibited normal pulpal histology.

    Conclusions:

    • Subapical anterior mandibular osteotomy in this primate model leads to significant and progressive pulpal pathology.
    • The surgical intervention appears to compromise dental pulp vitality, resulting in fibrosis and calcification.
    • Further research is needed to understand the mechanisms of pulp damage and its implications for clinical practice.

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