The effect of a root‐dentin pretreatment technique combining PIPS with MTAD aiming to improve the bond strength of glass fiber post

Abstract

The aim of this study was to evaluate the combined effect of MTAD and photon‐induced photoacoustic streaming (PIPS) technique on the smear layer removal and the bond strength of glass fiber post. Fifty‐five human mandibular premolars were chosen. After root canal therapy and post space preparation, the teeth were equally divided to five groups according to the methods of root‐dentin pretreatment: G1: distilled water (control); G2: 2.5% NaOCl+17% EDTA; G3: MTAD; G4: PIPS; G5: MTAD+PIPS. One sample was randomly selected from each group, and scanning electron microscope (SEM) was used to observe the microscopic morphology of the coronal, middle and apical level of the root‐dentin. The remaining ten samples from each group were glued to glass fiber posts, and the bond strength was assessed by push‐out test. SEM evaluation showed that the most complete smear layer removal was found in MTAD + PIPS group, especially in coronal third. Push‐out test results exhibited that there was a statistically significant interaction between the experimental groups and root canal third (p < .0005). Significant differences could be found among five groups (p < .05): G5 > G4 > G3 > G2 > G1. G5 had the highest bond strength. In conclusion, post space pretreatments with MTAD or PIPS technique can significantly remove smear layer and improve the bond strength of glass fiber post, and combination of them works best.

Photo-induced photoacoustic streaming and pineapple peel extract as final irrigant on extrusion bond strength of root filling material to canal wall

“…19 PIPS technique on the other hand also possesses the ability to expose organic collagen fibers which results in the generation of an uneven and irregular root surface that permits the adhesive resin sealer to penetrate the dentin surface resulting in the enhancement of mechanical interlocking thus improving the bond strength of AH plus sealer. 9 Group-3 specimens treated with 2.25% NaOCl+PIPS +17% EDTA also exhibited comparable outcomes of bond integrity to that of 2.25% NaOCl+PIPS + 6.25% PPE treated samples. This is in line with the findings of the study conducted by Wen at el., 20 They identify the effect of PIPS using MTAD solution and suggested that the combination technique used is effective in getting rid of the smear layer.…”

“…The higher bond strength achieved by PPE than EDTA-treated specimens can be explained by the presence of a potentially active substance which improves smear layer removal and promotes bond strength. 21,22 It can also be stated that EDTA and PPE in combination with PIPS as a final irrigation protocol displayed better bond integrity than PPE and EDTA alone.…”

“…A study by Wan et al and Yameen et al, explained that Er: YAG laser possesses the highest absorption capacity in water and also displays an extraordinary affinity for hydroxyapatite crystals. 22,23 Regarding modes of failure, it was identified that all the experimental groups mostly displayed the adhesive type of failure. The prevalence of adhesive failures at the sealer dentin interface is in line with the findings of previous literature and can be explained by the fact that complete drying of the canal is not possible and the moisture present may be the reason for the weak bond at the sealer dentin interface.…”

Dental Surface Conditioning Techniques to Increase the Micromechanical Retention to Fiberglass Posts: A Literature Review

“…The use of different solutions has been implemented to improve dentin conditioning and an effective remove of the SSL throughout the space created for the fiber post; these solutions include acid solutions, that is, ethylenediaminetetraacetic acid (EDTA) [10,25,34], OA [25,30,34], maleic acid [20], and citric acid at several concentrations such as 10%, 20%, and 50% [9,25]. Also, the use of several combined solutions allows a reduction of superficial tension, facilitating irrigants contact with dentinal walls, and enhancing SSL removal [35]; some examples are MTAD [34,36,37] and Q-mix [18,24]. There activity is summarized in Table 1.…”

Comparison of the effect of QMix and conventional root canal irrigants on push‐out bond strength of fiber post to root dentin

“…Evidence shows that the bond strength to root canal wall depends on several factors(Wan et al, 2020) such as the root dentin properties, presence/absence of the smear layer, type and thickness of cement, type of bonding agent and its polymerization pattern, and the quality of endodontic treatment prior to post cementation with regard to the type and concentration of irrigating solution, sealer type, and so on(Niu et al, 2021). Similar to our findings, Gundugar et al reported an increase in the bond strength of EndoSequence bioceramic sealer to root dentin following the use of QMix.…”