The Washout Resistance of Bioactive Root-End Filling Materials.

Area of Science:

• Dental Materials Science
• Endodontics
• Microsurgery

Background:

• Fast-setting bioactive cements are crucial for efficient retrograde fillings in endodontic microsurgery.
• Assessing the washout resistance of these materials is vital for clinical success.

Purpose of the Study:

• To evaluate the effect of irrigation on the washout resistance of Biodentine, EndoCem Zr, MTA HP, MTA Angelus White, and IRM.
• To compare the washout resistance of these materials in an in vitro apicectomy model.

Main Methods:

• An in vitro apicectomy model using artificial root ends was employed.
• 150 samples (30 per material) were subjected to irrigation and saline immersion.
• Washout resistance was assessed quantitatively and qualitatively via microscopy and scanning.

Main Results:

• Biodentine fillings showed significant disintegration upon immediate or delayed rinsing and immersion.
• IRM, EndoCem Zr, and MTA HP exhibited slight material loss.
• MTA Angelus White demonstrated slightly greater washout compared to IRM, EndoCem Zr, and MTA HP.

Conclusions:

• Biodentine demonstrated poor washout resistance under the tested conditions.
• MTA Angelus White, IRM, EndoCem Zr, and MTA HP showed acceptable to good washout resistance.
• Material selection is critical for retrograde fillings, especially concerning immediate post-operative handling.