Root filling bond strength using reciprocating file-matched single-cones with different sealers

Area of Science:

• Endodontics
• Dental Materials Science
• Biomaterials

Background:

• Root canal filling techniques and sealers are crucial for endodontic treatment success.
• Evaluating bond strength (BS) to root dentin is essential for material and technique selection.
• Reciprocating and single-cone techniques are modern alternatives to traditional lateral compaction.

Purpose of the Study:

• To compare the bond strength of root canal fillings to root dentin.
• To evaluate the influence of reciprocating file-matched single-cone versus lateral compaction techniques.
• To assess the performance of resin-based (AH Plus, Epiphany SE) and calcium-silicate-based (MTA Fillapex) sealers.

Main Methods:

• Maxillary canine roots were prepared and filled using Reciproc/WaveOne single-cone or ProTaper lateral compaction techniques.
• Root fillings utilized AH Plus, Epiphany SE, or MTA Fillapex sealers.
• Push-out tests and scanning electron microscopy (SEM) analyzed bond strength and dentin-sealer interface.

Main Results:

• Lateral compaction techniques yielded significantly higher bond strength than single-cone techniques.
• AH Plus sealer exhibited the highest bond strength with lateral compaction; Epiphany SE showed the lowest.
• Adhesive failures predominated across all groups; better dentin adaptation was noted with AH Plus and lateral compaction.

Conclusions:

• Lateral compaction is superior to single-cone techniques for achieving higher root canal filling bond strength.
• Sealer choice significantly influences bond strength, with AH Plus performing best in conjunction with lateral compaction.
• Root canal filling technique effectiveness is sealer-dependent, and a trend of decreasing bond strength apically was observed.