Abstract
The purpose of this study was to examine the effects of combining specific adhesive materials and various surface treatments on bonding durability and microleakage of vertically fractured roots. Adhesive models were prepared using bovine lower incisors. The experiment included the following five groups: SB-G group (control) (10% citric acid with 3% ferric chloride solution (10-3 solution) + an adhesive resin cement (4-META/MMA-TBB; Super-Bond®)), EC group (self-cure bonding agent (UB) + core composite resin (EC)), EC-G group (10-3 solution + UB + EC), EC-P group (40% phosphate solution + UB + EC), and EC-E group (18% ethylenediaminetetraacetic acid (EDTA) solution + UB + EC). After applying a load of 50,000 cycles, microleakage, microtensile bond strength (μTBS), and failure modes were examined. Microleakage of the EC, EC-G, and EC-E groups was significantly lower than that of the EC-P group. The μTBS of the EC-G group was significantly higher than that of the other groups. All EC groups showed that mixed (cohesive and adhesive) and adhesive failures were the most prevalent types of failure modes. The EC-G group showed the highest bonding durability and the lowest microleakage results, which indicates a possible alternative to current adhesive and tooth surface treatments.
Highlights
Vertical root fractures have become a clinically significant issue in tooth repair
This method consists of tooth extraction with minimal damage to periodontal tissue, removal of the granulated tissue around the root and the root canal filling materials, reconstruction of the fractured root with adhesive material, and intentional replantation [7,8,9]
Some clinical studies reported that ~1 month was required as a temporary splint of a vertically fractured tooth repaired with an adhesive resin [10,11]
Summary
Vertical root fractures have become a clinically significant issue in tooth repair. An adhesive restoration method followed by intentional replantation has been reported as a means of repairing teeth with vertically fractured roots. This method consists of tooth extraction with minimal damage to periodontal tissue, removal of the granulated tissue around the root and the root canal filling materials, reconstruction of the fractured root with adhesive material, and intentional replantation [7,8,9]. Some clinical studies reported that ~1 month was required as a temporary splint of a vertically fractured tooth repaired with an adhesive resin [10,11]
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