ABSTRACT
This study was carried out in order to compare the oral mucosal reactions to silk and poly vinylidene fluoride [PVDF] suture materials in albino rabbit. 21 mature male albino rabbits were selected and under general and local anesthesia suture materials were placed randomly at right and left side of vestibular area of maxillary jaw. The animals were divided into 3 equal groups based on the time of suture removal [3, 5 and 7 days after suturing], and inflammatory reaction of the oral mucosal at sutured area was scored clinically and sutures were removed. The sutured areas in all of the animals were observed 14 days after suturing and the inflammatory reaction was scored again. Wilcoxon and Kruskal Wallis tests were used for data analysis. Results showed that in all intervals, inflammatory reactions to PVDF sutures were significantly milder comparing to silk sutures [P<0.05]. Also, later suture removal increased the inflammatory reaction and healing decreased. It can be concluded that in oral surgeries PVDF sutures due to creating milder tissue reactions is preferable to silk suture
ABSTRACT
This study was carried out in order to compare mineral trioxide aggregate [MTA] and dycal in dog's teeth as pulp capping agents. After general and local anesthesia forty-two teeth of three dogs were used. In each tooth a class V cavity was prepared and the pulp was exposed using No.1 round bur. Then the exposed area was capped using either MTA or calcium hydroxide and the rest of the cavity was restored by amalgam. Radiographic image was taken before the procedure and after 4, 8, and 12 weeks. The animals were sacrificed at 4, 8, and 12 weeks and the teeth were prepared for H and E staining. The pulps of the teeth were evaluated for inflammation, necrosis, and formation and thickness of calcified bridge. Histologic data were analyzed by Kruskal Wallis, x [2], Cochran, and Friedman tests. Histopathologic results showed that in four weeks, MTA had significant differences with calcium hydroxide in the presence and thickness of calcified bridge [P=0.046] as well as inflammation [P= 0.014] and hyperemia [P=0.014]. Eight weeks MTA specimens showed significant difference in thickness of calcified bridge [P=0.008]. Twelve weeks after pulp capping, the amount of necrosis and chronic inflammation were higher in dycal specimens; however, there was no significant difference between two experimental groups. Radiographic evaluation did not show any periapical lesion, internal and external resorption, or widening of periodontal ligament in none of the teeth at all time intervals. Based on the result of this study, MTA showed to be a more reliable material as pulp capping agent in comparison with calcium hydroxide
Subject(s)
Animals , Aluminum Compounds , Calcium Hydroxide , Dental Pulp Cavity , Dental Pulp Calcification , Dogs , Root Canal Filling Materials , Tooth Apex , Oxides , Minerals , PulpotomyABSTRACT
This study was carried out in order to compare the oral mucosal reactions to silk and poly vinylidene fluoride [PVDF] suture materials in albino rabbit. Twenty-one mature male albino rabbits were selected and under general and local anesthesia suture materials were placed randomly at right and left side of vestibular area of maxillary jaw. The animals were divided into three equal groups based on the time of suture removal [3, 5 and 7 days after suturing], and inflammatory reaction of the oral mucosa at sutured area was scored clinically and sutures were removed. The sutured areas in all of the animals were observed 14 days after suturing and the inflammatory reaction was scored again. Wilcoxon and Kruskal-Wallis tests were used for data analysis. Results showed that in all time intervals, inflammatory reactions to PVDF sutures were significantly milder comparing to silk sutures [P<0.05]. Also, later suture removal increased the inflammatory reaction and healing decreased. It can be concluded that in oral surgeries PVDF suture due to creating milder tissue reactions is preferable to silk suture