Adhesive bonding to pulp chamber dentin after different irrigation regimens

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Dental adhesives are crucial for durable restorations.
• Pulp chamber dentin requires specific preparation for optimal bonding.
• Microleakage at the adhesive-dentin interface can compromise restoration longevity.

Purpose of the Study:

• To evaluate the impact of ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) irrigation on microleakage.
• To assess the interfacial morphology of three distinct dental adhesives bonded to pulp chamber dentin.
• To determine the efficacy of combined EDTA and NaOCl irrigation in reducing microleakage.

Main Methods:

• Seventy-two extracted molars were prepared, and pulp chamber dentin was bonded with Adper Easy One, Adper Prompt L-Pop, or Adper Single Bond 2.
• Samples were irrigated with normal saline or a combination of 17% EDTA and 5.25% NaOCl.
• Microleakage tests and scanning electron microscopic analyses were performed on composite resin restorations.

Main Results:

• EDTA and NaOCl irrigation significantly decreased microleakage when using Adper Easy One.
• No significant difference in microleakage was observed for Adper Prompt L-Pop and Adper Single Bond 2 with this irrigation regimen.
• The tested irrigation protocol did not adversely affect the bonding of any of the evaluated adhesives.

Conclusions:

• Combined EDTA and NaOCl irrigation is not detrimental to the bonding of the tested dental adhesives.
• This irrigation strategy effectively reduces microleakage specifically for the Adper Easy One adhesive.
• Further investigation into interfacial morphology may provide deeper insights into bonding mechanisms.