Dentin barrier test with transfected bovine pulp-derived cells.

Area of Science:

• Biomaterials Science
• Cell Biology
• Dental Research

Background:

• Dental pulp-derived cells offer a promising in vitro model for assessing dental materials.
• Evaluating the biocompatibility of dental materials is crucial for clinical success.
• Standard cell culture methods may not fully replicate the in vivo environment of the dental pulp.

Purpose of the Study:

• To investigate the growth kinetics of SV40 large T-antigen-transfected bovine pulp-derived cells on dentin.
• To evaluate a dentin barrier test device using these cells for dental material cytotoxicity assessment.
• To compare the sensitivity of these cells to dental materials against other models.

Main Methods:

• Cells were seeded on dentin slices and incubated for up to 21 days, with proliferation assessed via MTT assay.
• A dentin barrier test device was used for cytotoxicity tests, seeding 3500 cells/mm2 on dentin discs.
• Test materials were applied after preincubation, and cell survival was evaluated using MTT assay after 24h exposure with or without perfusion.

Main Results:

• Bovine pulp-derived cells exhibited comparable growth kinetics on dentin slices and standard tissue culture plates.
• In cytotoxicity tests, these cells demonstrated higher sensitivity to dental materials compared to human foreskin fibroblasts.
• The results align with clinical expectations regarding material biocompatibility.

Conclusions:

• SV40 large T-antigen-transfected bovine pulp-derived cells show viable growth on dentin and are suitable for in vitro dental material testing.
• This cell model offers enhanced sensitivity for cytotoxicity assessments compared to previous 3D models.
• Further advancements are anticipated with the use of three-dimensional cultures of pulp-derived cells for improved in vitro dental research.