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Author Spotlight: Development and Evaluation of a Standardized Rat Model for Calvarial Suture-Bony Composite Defects
Published on: May 10, 2024
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Decoronation-induced infected alveolar socket defect rat model for ridge preservation
Chih-Hsiang Fang1, Hung-Ying Lin2, Chung-Kai Sun3
1Trauma and Emergency Center, China Medical University Hospital, No. 2, Xueshi Rd., North Dist., Taichung City, 404018, Taiwan.
Scientific Reports
|June 15, 2022
Summary
This study introduces a novel rat model for alveolar ridge preservation using decoronation. The findings suggest specific timing for tooth extraction to create either periodontally-involved defects or standardized critical dimension defects.
Area of Science:
- Oral and Maxillofacial Surgery
- Periodontology
- Biomaterials Science
Background:
- Standardized rat models for alveolar ridge preservation are lacking.
- Existing models do not adequately replicate clinical scenarios of bone and soft tissue changes post-extraction.
Purpose of the Study:
- To develop and validate a decoronation-induced infected alveolar socket model in rats.
- To evaluate bone and soft tissue changes and periodontal conditions using micro-computed tomography and histology.
- To compare the efficacy of Bio-Oss Collagen in preserving alveolar dimensions.
Main Methods:
- Decoronation or extraction of rat maxillary first molars (M1).
- Micro-computed tomography and histological analysis at 2, 6, 10, and 14 weeks.
- Grafting of standardized defects with Bio-Oss Collagen for comparison.
Main Results:
- Decoronation preserved bone and soft tissue dimensions but induced periodontal breakdown of adjacent molars.
- Histology revealed significant inflammation and bone resorption.
- Critical defect dimensions were identified (2.2-2.3 mm vertical height, 2.8-3.2 mm width).
- Bio-Oss Collagen partially preserved ridge width but not height.
Conclusions:
- The decoronation model offers two approaches: one for periodontally-involved defects (M1 root extraction 6 weeks post-decoronation) and another for standardized defects (M1 root extraction 2 weeks post-decoronation).
- The model provides valuable insights into alveolar ridge preservation strategies and biomaterial efficacy.
