Pulpotomy of human primary molars with MTA and Portland cement: a randomised controlled trial
V. T. Sakai, A. B. S. Moretti, T. M. Oliveira, A. P. C. Fornetti, C. F. Santos, M. A. A. M. Machado & R. C. C. Abdo
British Dental Journal 207, E5 (2009) Published online: 24 July 2009 doi:10.1038/sj.bdj.2009.665
Objective: This study compared the clinical and radiographic effectiveness of mineral trioxide aggregate (MTA) and Portland cement (PC) as pulp dressing agents in carious primary teeth.
Methodology: Thirty carious primary mandibular molars of children aged 5-9 years old were randomly assigned to MTA or PC groups, and treated by a conventional pulpotomy technique. The teeth were restored with resin modified glass ionomer cement. Clinical and radiographic successes and failures were recorded at 6, 12, 18 and 24-month follow-up.
Results: All pulpotomised teeth were clinically and radiographically successful at all follow-up appointments. Six out of 15 teeth in the PC group and five out of 14 teeth in the MTA group exfoliated throughout the follow-up period. No statistically significant difference regarding dentine bridge formation was found between both groups throughout the follow-up period. As far as pulp canal obliteration is concerned, a statistically significant difference was detected at 6-month follow-up (p <0.05), since the beginning of mineralised material deposition could be radiographically detected in 100% and 57.14% of the teeth treated with PC and MTA, respectively.
Conclusions: Portland cement (PC) may serve as a substitute for MTA in pulpotomy of primary teeth. Besides the similar clinical and radiographic effectiveness of PC and MTA as pulpotomy dressing agents, PC has the advantage of being an inexpensive material. Before unlimited clinical use of PC, further studies with large samples and long follow-up assessments are needed.
Showing posts with label Scientific articles. Show all posts
Showing posts with label Scientific articles. Show all posts
Tuesday 11 August 2009
Sunday 9 August 2009
Featured article
Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis.
Chiara O. Navarra, Milena Cadenaro, Steven R. Armstrong, Julie Jessop, Francesca Antoniolli, Valter Sergo, Roberto Di Lenarda and Lorenzo Breschi
Dental Materials 2009:25(9):1178-1185
Abstract
Objectives: To examine the degree of conversion (DC) of the adhesive interfaces created by Filtek Silorane Adhesive and Clearfil SE Bond using micro-Raman spectroscopy.
Methods: The adhesives were applied on human dentin in accordance with manufacturer's instructions. Specimens were cut to expose the bonded interfaces to the micro-Raman beam (Ranishaw InVia; laser wl 785 nm). Raman spectra were collected along the dentin/self-etching primer/adhesive interface at 1 μm intervals. The relative intensities of bands associated with mineral (P–O functional group at 960 cm−1) and adhesive (C–C–O group at 605 cm−1) components within the bonded interface were used to detect monomer penetration into the dentin matrix and to calculate the degree of conversion (Cdouble bond; length as m-dashC at 1640 cm−1 as reaction peak, C–C–O at 605 cm−1 as reference peak). Data were statistically analyzed with two-way ANOVA.
Results: DC of Filtek Silorane Adhesive was 69 ± 7% in the adhesive layer, increasing (p<.05) to 93 ± 5% in the primer and 92 ± 9% in the hybrid layer. Clearfil SE Bond showed a DC of 83 ± 3% in the hybrid and 85 ± 3% in the adhesive layer. Thus, Filtek Silorane Adhesive showed a higher DC than Clearfil SE Bond in the hybrid layer (p<.05), but a lower DC in the adhesive (p<.05).
Significance: As high DC is a fundamental pre-requisite for the stability of the bond over time, this study supports the hypothesis that optimal stability of Filtek Silorane Adhesive can be obtained. However, further research is needed to investigate the mechanical properties of the hybrid layer created by Filtek Silorane Adhesive and its long-term stability.
Chiara O. Navarra, Milena Cadenaro, Steven R. Armstrong, Julie Jessop, Francesca Antoniolli, Valter Sergo, Roberto Di Lenarda and Lorenzo Breschi
Dental Materials 2009:25(9):1178-1185
Abstract
Objectives: To examine the degree of conversion (DC) of the adhesive interfaces created by Filtek Silorane Adhesive and Clearfil SE Bond using micro-Raman spectroscopy.
Methods: The adhesives were applied on human dentin in accordance with manufacturer's instructions. Specimens were cut to expose the bonded interfaces to the micro-Raman beam (Ranishaw InVia; laser wl 785 nm). Raman spectra were collected along the dentin/self-etching primer/adhesive interface at 1 μm intervals. The relative intensities of bands associated with mineral (P–O functional group at 960 cm−1) and adhesive (C–C–O group at 605 cm−1) components within the bonded interface were used to detect monomer penetration into the dentin matrix and to calculate the degree of conversion (Cdouble bond; length as m-dashC at 1640 cm−1 as reaction peak, C–C–O at 605 cm−1 as reference peak). Data were statistically analyzed with two-way ANOVA.
Results: DC of Filtek Silorane Adhesive was 69 ± 7% in the adhesive layer, increasing (p<.05) to 93 ± 5% in the primer and 92 ± 9% in the hybrid layer. Clearfil SE Bond showed a DC of 83 ± 3% in the hybrid and 85 ± 3% in the adhesive layer. Thus, Filtek Silorane Adhesive showed a higher DC than Clearfil SE Bond in the hybrid layer (p<.05), but a lower DC in the adhesive (p<.05).
Significance: As high DC is a fundamental pre-requisite for the stability of the bond over time, this study supports the hypothesis that optimal stability of Filtek Silorane Adhesive can be obtained. However, further research is needed to investigate the mechanical properties of the hybrid layer created by Filtek Silorane Adhesive and its long-term stability.
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