Tissue dissolution ability of sodium hypochlorite activated by photon-initiated photoacoustic streaming technique.
BACKGROUND
The aim of this study was to evaluate the effect of the photon-initiated photoacoustic streaming (PIPS) technique on the pulp tissue-dissolving capacity of sodium hypochlorite (NaOCl) and compare it with the EndoActivator System (Dentsply Tulsa Dental Specialties, Tulsa, OK) and the Er:YAG laser with an endodontic fiber tip.


METHODS
Bovine pulp tissue samples (45 ± 15 mg) and dentin powder (10 mg) were placed in 1.5-mL Eppendorf tubes with 1 mL 5.25% NaOCl (Wizard; Rehber Kimya, Istanbul, Turkey) or distilled water (control) for 5 minutes with activation by the EndoActivator System, the Er:YAG laser with an endodontic fiber tip, and the PIPS technique. Nonactivated NaOCl served as the positive control. All testing procedures were performed at room temperature. The tissue samples were weighed before and after treatment, and the percentage of weight loss was calculated. The differences were statistically analyzed.


RESULTS
The highest rate of tissue dissolution was observed in the NaOCl + Er:YAG group (P < .05). The NaOCl + PIPS group dissolved more bovine pulp tissue than the nonactivated NaOCl group (P < .05). There was no statistically significant difference between the rates of tissue dissolution of the NaOCl + EA and the nonactivated NaOCl groups (P > .05).


CONCLUSIONS
NaOCl activation with the Er:YAG laser with an endodontic fiber tip was the most effective in bovine pulp tissue dissolution. The PIPS technique also promoted superior tissue-dissolving effects when compared with no activation. However, the EndoActivator System had no direct effect on tissue dissolution.
Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey. Electronic address: bguneser@hotmail.com.
Mehmet Burak
MB
Guneser
Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey.
Dilara
D
Arslan
Department of Prosthodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey.
Aslihan
A
Usumez
D000818:Animals; D002417:Cattle; D003782:Dental Pulp / Q000187:drug effects*; D053844:Lasers, Solid-State / Q000627:therapeutic use; D008422:Materials Testing; D061088:Photoacoustic Techniques; D012388:Root Canal Irrigants / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000379:methods*; D012973:Sodium Hypochlorite / Q000627:therapeutic use*
D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite
Dentin; EndoActivator; Er:YAG laser; photon-induced photoacoustic streaming; pulp tissue dissolution; sodium hypochlorite