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Three-year randomised clinical trial to evaluate the clinical performance, quantitative and qualitative wear patterns of hybrid composite restorations.

Palaniappan S, Elsen L, Lijnen I, Peumans M, Van Meerbeek B, Lambrechts P - Clin Oral Investig (2009)

Bottom Line: The gypsum replicas at each recall were used for 3D laser scanning to quantify wear, and the epoxy resin replicas were observed under scanning electron microscope to study the qualitative wear patterns.Within the observation period, the nano-hybrid and micro-hybrid restorations evolved better in polishability with improved surface gloss retention than the conventional hybrid counterpart.Qualitatively, while the micro-filled and nano-hybrid composite restorations exhibited signs of fatigue similar to the conventional hybrid composite restorations at heavy occlusal contact area, their light occlusal contact areas showed less surface pitting after 3 years of clinical service.

View Article: PubMed Central - PubMed

Affiliation: Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.

ABSTRACT
The aim of the study was to compare the clinical performance, quantitative and qualitative wear patterns of conventional hybrid (Tetric Ceram), micro-filled hybrid (Gradia Direct Posterior) and nano-hybrid (Tetric EvoCeram, TEC) posterior composite restorations in a 3-year randomised clinical trial. Sixteen Tetric Ceram, 17 TEC and 16 Gradia Direct Posterior restorations were placed in human molars and evaluated at baseline, 6, 12, 24 and 36 months of clinical service according to US Public Health Service criteria. The gypsum replicas at each recall were used for 3D laser scanning to quantify wear, and the epoxy resin replicas were observed under scanning electron microscope to study the qualitative wear patterns. After 3 years of clinical service, the three hybrid restorative materials performed clinically well in posterior cavities. Within the observation period, the nano-hybrid and micro-hybrid restorations evolved better in polishability with improved surface gloss retention than the conventional hybrid counterpart. The three hybrid composites showed enamel-like vertical wear and cavity-size dependant volume loss magnitude. Qualitatively, while the micro-filled and nano-hybrid composite restorations exhibited signs of fatigue similar to the conventional hybrid composite restorations at heavy occlusal contact area, their light occlusal contact areas showed less surface pitting after 3 years of clinical service.

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Graph of correlation between vertical loss and volume loss of restorations. r2 = 0.998 for Tetric Ceram, r2 = 0.996 for Tetric Ceram and r2 = 0.998 for Gradia Direct Posterior
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Fig4: Graph of correlation between vertical loss and volume loss of restorations. r2 = 0.998 for Tetric Ceram, r2 = 0.996 for Tetric Ceram and r2 = 0.998 for Gradia Direct Posterior

Mentions: Volume loss For all the recall periods, the RSV loss and the ESV loss, both contributing to the measured TSV loss, are shown in Table 9 and Fig. 2b. Figure 3b represents the differential volume loss magnitude of enamel and composites in each of the 15 subjects of the study population. The volume loss of the three different hybrid composites (RSV) remained significantly higher (p > 0.05) than enamel (ESV). The mean, minimal and the maximal loss of each material along the restoration margins at the 36-month recall are shown in Table 10. No statistically significant differences were observed with the sign test among the three materials (p > 0.05). There was a strong correlation between vertical and volume loss; this correlation was highly significant (r2 = 0.99 for Tetric Ceram, TEC and Gradia Direct Posterior; p = 0.0001; Fig. 4). A line of best fit to the correlated data indicates a linear relationship between vertical and volume loss of restorations.Table 9


Three-year randomised clinical trial to evaluate the clinical performance, quantitative and qualitative wear patterns of hybrid composite restorations.

Palaniappan S, Elsen L, Lijnen I, Peumans M, Van Meerbeek B, Lambrechts P - Clin Oral Investig (2009)

Graph of correlation between vertical loss and volume loss of restorations. r2 = 0.998 for Tetric Ceram, r2 = 0.996 for Tetric Ceram and r2 = 0.998 for Gradia Direct Posterior
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2908443&req=5

Fig4: Graph of correlation between vertical loss and volume loss of restorations. r2 = 0.998 for Tetric Ceram, r2 = 0.996 for Tetric Ceram and r2 = 0.998 for Gradia Direct Posterior
Mentions: Volume loss For all the recall periods, the RSV loss and the ESV loss, both contributing to the measured TSV loss, are shown in Table 9 and Fig. 2b. Figure 3b represents the differential volume loss magnitude of enamel and composites in each of the 15 subjects of the study population. The volume loss of the three different hybrid composites (RSV) remained significantly higher (p > 0.05) than enamel (ESV). The mean, minimal and the maximal loss of each material along the restoration margins at the 36-month recall are shown in Table 10. No statistically significant differences were observed with the sign test among the three materials (p > 0.05). There was a strong correlation between vertical and volume loss; this correlation was highly significant (r2 = 0.99 for Tetric Ceram, TEC and Gradia Direct Posterior; p = 0.0001; Fig. 4). A line of best fit to the correlated data indicates a linear relationship between vertical and volume loss of restorations.Table 9

Bottom Line: The gypsum replicas at each recall were used for 3D laser scanning to quantify wear, and the epoxy resin replicas were observed under scanning electron microscope to study the qualitative wear patterns.Within the observation period, the nano-hybrid and micro-hybrid restorations evolved better in polishability with improved surface gloss retention than the conventional hybrid counterpart.Qualitatively, while the micro-filled and nano-hybrid composite restorations exhibited signs of fatigue similar to the conventional hybrid composite restorations at heavy occlusal contact area, their light occlusal contact areas showed less surface pitting after 3 years of clinical service.

View Article: PubMed Central - PubMed

Affiliation: Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.

ABSTRACT
The aim of the study was to compare the clinical performance, quantitative and qualitative wear patterns of conventional hybrid (Tetric Ceram), micro-filled hybrid (Gradia Direct Posterior) and nano-hybrid (Tetric EvoCeram, TEC) posterior composite restorations in a 3-year randomised clinical trial. Sixteen Tetric Ceram, 17 TEC and 16 Gradia Direct Posterior restorations were placed in human molars and evaluated at baseline, 6, 12, 24 and 36 months of clinical service according to US Public Health Service criteria. The gypsum replicas at each recall were used for 3D laser scanning to quantify wear, and the epoxy resin replicas were observed under scanning electron microscope to study the qualitative wear patterns. After 3 years of clinical service, the three hybrid restorative materials performed clinically well in posterior cavities. Within the observation period, the nano-hybrid and micro-hybrid restorations evolved better in polishability with improved surface gloss retention than the conventional hybrid counterpart. The three hybrid composites showed enamel-like vertical wear and cavity-size dependant volume loss magnitude. Qualitatively, while the micro-filled and nano-hybrid composite restorations exhibited signs of fatigue similar to the conventional hybrid composite restorations at heavy occlusal contact area, their light occlusal contact areas showed less surface pitting after 3 years of clinical service.

Show MeSH
Related in: MedlinePlus