Phytic acid: an alternative root canal chelating agent.

Area of Science:

• Biomaterials Science
• Dental Research
• Cell Biology

Background:

• Sodium hypochlorite (NaOCl) is a common irrigant in endodontics, but it leaves a smear layer.
• Effective smear layer removal is crucial for successful root canal treatment.
• Investigating alternative chelating agents is important for improving biocompatibility.

Purpose of the Study:

• To assess inositol hexakisphosphate (IP6) as a final rinse for smear layer removal after NaOCl treatment.
• To evaluate the effect of IP6 on dentin surfaces and instrumented root canals.
• To determine the impact of IP6 on osteoblast-like cell viability and alkaline phosphatase activity.

Main Methods:

• Human canine root canals and dentin surfaces were treated with NaOCl, followed by rinses with 17% EDTA, 1% IP6, or distilled water.
• Scanning electron microscopy (SEM) was used to evaluate smear layer removal.
• Cell viability and alkaline phosphatase assays assessed the effects on MC3T3-E1 cells.

Main Results:

• IP6 effectively removed the smear layer from both instrumented root canals and dentin surfaces.
• Compared to EDTA, IP6 exhibited lower cytotoxicity.
• IP6 did not negatively affect the differentiation of MC3T3-E1 cells.

Conclusions:

• Inositol hexakisphosphate (IP6) demonstrates potential as an effective smear layer chelating agent.
• IP6 presents a more biocompatible alternative to EDTA for root canal irrigation.
• Further research into IP6 for endodontic applications is warranted.