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Formulation of enamel matrix derivative for surface coating. Kinetics and cell colonization
S Gestrelius1, C Andersson, A C Johansson
1BIORA AB, Malmö, Sweden. stina.gestrelius@biora.se
Journal of Clinical Periodontology
|October 6, 1997
Summary
Enamel Matrix Derivative (EMD) in propylene glycol alginate (PGA) promotes periodontal regeneration. This study shows EMD effectively binds to root surfaces and supports cell repopulation for enhanced dental healing.
Area of Science:
- Periodontal regeneration
- Biomaterials science
- Dental tissue engineering
Background:
- Enamel Matrix Derivative (EMD), a protein complex from the amelogenin family, is known to promote periodontal regeneration.
- EMD has demonstrated efficacy when applied to denuded root surfaces in dehiscence models.
- Propylene glycol alginate (PGA) is investigated as a potential vehicle for localized EMD delivery.
Purpose of the Study:
- To evaluate propylene glycol alginate (PGA) as a suitable vehicle for the local application of Enamel Matrix Derivative (EMD).
- To characterize the adsorption and retention properties of EMD on dental root surfaces.
- To assess the potential of EMD in PGA to support cellular repopulation in periodontal defects.
Main Methods:
- EMD was dissolved in PGA at acidic pH, forming a viscous solution that precipitates at neutral pH and body temperature.
- Surface analysis techniques including ellipsometry, total internal reflection fluorescence (TIRF), and biospecific interaction analysis (BIA) were used to study EMD multilayers on mineral and protein surfaces.
- Radiolabeling and scanning electron microscopy (SEM) were employed to track EMD retention and observe cellular interactions on dental roots in animal models.
Main Results:
- EMD demonstrated adsorption to hydroxyapatite, collagen, and denuded dental roots, forming insoluble spherical complexes.
- Detectable amounts of EMD remained at the application site on the root surface for up to two weeks in rat and pig models.
- SEM studies on monkey teeth suggested that EMD in PGA may promote fibroblast-like cell repopulation within the initial weeks post-application.
Conclusions:
- Propylene glycol alginate (PGA) serves as an effective vehicle for the local delivery of Enamel Matrix Derivative (EMD).
- EMD exhibits strong binding affinity to dental root surfaces, ensuring sustained presence for potential regenerative effects.
- EMD in PGA shows promise in promoting cellular activity, potentially contributing to periodontal tissue regeneration.