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Influence of calcium hydroxide points on the quality of intracanal dressing filling
Rahde, Nicole de Mello; Figueiredto, José Antonio Poli; Oliveira, Elias Pandonor Motcy.
  • Rahde, Nicole de Mello; Brazilian Dental Association. Program in Endodontics. Porto Alegre. BR
  • Figueiredto, José Antonio Poli; University College London. Eastman Dental Institute. London. GB
  • Oliveira, Elias Pandonor Motcy; Lutheran University of Brazil. Program in Endodontics. Canoas. BR
J. appl. oral sci ; 14(3): 219-223, May-June 2006. ilus, tab
Article in English | LILACS, BBO | ID: lil-448198
ABSTRACT
PURPOSE: The aim of this study was to evaluate, in vitro, the quality of calcium hydroxide [Ca(OH)2] paste filling (Ultracal, Ultradent) associated or not with Ca(OH)2-containing gutta-percha points (Calcium Hydroxide Plus PointsTM, Roeko) in curved root canals. MATERIAL AND METHODS: One hundred and twenty roots of extracted human teeth, randomly divided into three curvature ranges (mild - 0 to 14°; moderate - 15° to 29°; severe - >30°) were used. After chemomechanical preparation, the roots were assigned to 4 groups (n=30), according to the technique of intracanal dressing placement: group 1 - Ca(OH)2 paste was applied with a lentulo spiral; group 2 - Ca(OH)2 paste was applied with a lentulo spiral and a Ca(OH)2 point was inserted into the canal; group 3 - Ca(OH)2 paste was applied with a NavitipTM tip (supplied with Ultracal system); group 4 - Ca(OH)2 paste was applied with a NavitipTM tip and a Ca(OH)2 point was inserted into the canal. The roots were cleared and the quality of apical third filling was assessed by a calibrated experienced examiner. The specimens were examined under stereomicroscopy and scored 1 to 4 (i.e., from inadequate to complete root canal filling). The results were analyzed statistically by ANOVA and Duncan's post hoc test at 5 percent significance level. RESULTS: There were no statistically significant differences (p>0.05) among the curvature degrees in groups 1, 3 and 4. Severely curved roots in group 2 presented bordering significance (p=0.05). The groups that associated the use of Ca(OH)2 paste and points (2 and 4) showed better apical filling than the other groups, but this difference was statistically significant (p<0.001) only for roots with severe curvature. CONCLUSION: According to the results of this study, the curvature degree did not influence the quality of filling. The techniques that used Ca(OH)2-containing gutta-percha points yielded better filling of the apical third in roots with severe curvature.
RESUMO
OBJETIVO: O objetivo deste estudo foi avaliar, in vitro, a qualidade do preenchimento de canais radiculares curvos com a pasta de hidróxido de cálcio [Ca(OH)2] Ultracal (Ultradent), associada ou não a cones de guta-percha contendo hidróxido de cálcio (Calcium Hydroxide Plus PointsTM, Roeko). MATERIAL E MÉTODOS: Cento e vinte raízes de dentes humanos extraídos, aleatoriamente distribuídas em 3 faixas de curvatura (leve - 0 a 14°; moderada - 15° a 29°; severa > 30°) foram utilizadas. Após o preparo químico-mecânico, as raízes foram divididas em 4 grupos (n=30) de acordo com o método de aplicação da medicação intracanal: grupo 1 - aplicação da pasta de Ca(OH)2 com espiral de lentulo; grupo 2 - aplicação da pasta de Ca(OH)2 com espiral de lentulo, seguida da introdução de um cone de Ca(OH)2; grupo 3 - aplicação da pasta de Ca(OH)2 com a ponta NavitipTM (fornecida com o Sistema Ultracal); grupo 4 - aplicação da pasta de Ca(OH)2 com a ponta NavitipTM seguida da introdução de um cone de Ca(OH)2. As raízes foram diafanizadas e avaliadas quanto à qualidade do preenchimento do terço apical dos canais por um examinador calibrado. Os espécimes foram examinados em lupa estereoscópica e classificadas por escores de 1 a 4 (desde preenchimento inadequado até preenchimento total dos canais). Os resultados foram comparados através da análise de variância e teste post hoc de Duncan com nível de significância de 5 por cento. RESULTADOS: Não se observaram diferenças estatisticamente significantes (p>0.05) entre os graus de curvatura dos grupos 1, 3 e 4 quanto ao preenchimento dos canais. A curvatura severa no grupo 2 apresentou significância limítrofe (p=0,05). Os grupos que associaram pasta e cones de Ca(OH)2 (2 e 4) apresentaram melhor preenchimento apical em relação aos demais grupos, porém essa diferença foi estatisticamente significante (p<0,001) somente para as raízes com curvatura severa. CONCLUSÃO: De acordo com os resultados deste estudo, o grau...
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Root Canal Therapy / In Vitro Techniques / Calcium Hydroxide / Root Canal Preparation / Gutta-Percha Type of study: Controlled clinical trial Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2006 Type: Article Affiliation country: Brazil / United kingdom Institution/Affiliation country: Brazilian Dental Association/BR / Lutheran University of Brazil/BR / University College London/GB

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Full text: Available Index: LILACS (Americas) Main subject: Root Canal Therapy / In Vitro Techniques / Calcium Hydroxide / Root Canal Preparation / Gutta-Percha Type of study: Controlled clinical trial Limits: Humans Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2006 Type: Article Affiliation country: Brazil / United kingdom Institution/Affiliation country: Brazilian Dental Association/BR / Lutheran University of Brazil/BR / University College London/GB