Masaya Suzuki · Takahito Ogisu · Chikage Kato Koichi Shinkai · Yoshiroh Katoh
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Effect of CO2 laser irradiation on wound healing of exposed rat pulp
- چاپ و سال / کشور: 2011
Description
This study examined the effects of direct pulp capping treatment using super-pulsed CO2 laser preirradiation on the wound healing process of exposed rat pulp on days 1, 3, 7, 14, and 28 postoperatively. Group 1 was irradiated with a CO2 laser and directly capped with a self-etching adhesive system. The laser was operated in super-pulse mode (pulse duration, 200 μs; interval, 5800 μs; 0.003 J/ pulse). The irradiation conditions were a power output of 0.5 W, an irradiation time of 3 s, and repeat mode (10 ms of irradiation at 10-ms intervals for a total beam exposure time of 1.5 s), defocused beam diameter of 0.74 mm (approximately 20 mm from the exposed pulp surface), energy density of 0.698 J/cm2 per pulse, total applied energy of 0.75 J, and an activated air-cooling system. Group 2 was capped with the self-etching adhesive system. Group 3 was capped with commercially available calcium hydroxide, and the self-etching adhesive system was applied to the cavity. The following parameters were evaluated: pulp tissue disorganization, infl ammatory cell infi ltration, reparative dentin formation, and bacterial penetration. The results were statistically analyzed using the Kruskal-Wallis test for differences among the groups at each observation period (P < 0.05). There were no signifi cant differences among the experimental groups in any parameters at any postoperative period (P > 0.05). CO2 laser irradiation was effective in arresting hemorrhaging but showed a tendency to delay reparative dentin formation compared with the application of calcium hydroxide.
Odontology (2011) 99:34–44 DOI 10.1007/s10266-010-0140-5 Received: November 15, 2009 / Accepted: May 20, 2010
