Own brand label restorative materials-A false bargain?

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Polymer Chemistry

Background:

• Own brand label (OBL) restorative materials are increasingly prevalent in dentistry, often marketed as cost-effective alternatives to established brands.
• These OBLs frequently claim comparable or superior performance characteristics, necessitating rigorous scientific evaluation.
• A lack of comprehensive scientific scrutiny for many OBLs raises concerns regarding their clinical efficacy and safety.

Purpose of the Study:

• To conduct a comparative evaluation of mechanical, chemical, and cytotoxicological properties of a commercial composite versus two OBL composites.
• To assess critical parameters including depth of cure, mechanical strength, polymerization behavior, and material-chemical interactions.
• To determine the in vitro cytotoxicity of elutable components from these dental composites.

Main Methods:

• Evaluated depth of cure, flexural strength, degree of conversion, polymerization shrinkage, filler characteristics (morphology, elemental analysis), Vickers hardness, and surface roughness post-abrasion.
• Quantified monomer elution and assessed cytotoxicity using cell-based assays.
• Employed statistical analysis to compare parameters between the commercial composite and OBLs.

Main Results:

• The commercial composite demonstrated superior depth of cure, degree of cure, hardness, and reduced post-abrasion roughness compared to OBLs (p<0.001).
• OBL composites exhibited higher polymerization shrinkage (2.86%-4.13%) and significantly greater monomer elution (p<0.001).
• Extracts from OBLs induced significantly higher cytotoxicity, characterized by altered cell morphology and loss of confluence.

Conclusions:

• Conventional brand-name composites generally outperformed OBL composites across multiple critical performance metrics.
• OBL composites present higher risks due to increased monomer elution and cytotoxicity.
• Dentists should exercise caution and prioritize scientifically validated materials over OBLs lacking robust evidence.