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Clinical Performance of Viscous Glass Ionomer Cement in Posterior Cavities over Two Years.

Frankenberger R, Garcia-Godoy F, Krämer N - Int J Dent (2010)

Bottom Line: Significant changes over time were found for the criteria "surface roughness", "marginal integrity", "restoration integrity", and "overall judgement" (P < .05; Friedman test).SLM analysis revealed statistically significant differences for the following criteria over time (baseline/6 months/12 months (in % of entire evaluable margin length); P < .05; Friedman 2-way ANOVA): perfect margin 37/19/11, negative step formation 26/49/57, gap formation 2/7/9, and overhang 24/11/8.Gap formations were more frequently observed in Class II restorations than in Class I (12% versus 3% after 12 months; P < .05, Mann-Whitney-U test).

View Article: PubMed Central - PubMed

Affiliation: Department of Operative Dentistry and Endodontics, Medical Center for Dentistry, University Medical Center Giessen and Marburg, Georg-Voigt-Street 3, 35039 Marburg, Germany.

ABSTRACT
In this controlled prospective clinical study the highly viscous glass ionomer cement Ketac Molar was clinically assessed in Class I and Class II cavities. Forty-nine subjects (mean age 32.3 years) received 108 restorations placed by six operators in conventional Black I and II type cavities with undercuts after excavating primary lesions or after removing insufficient restorations. At baseline, and after 6, 12, and 24 months, restorations were assessed by two independent investigators according to modified USPHS codes and criteria. Impressions of the restorations were taken and epoxy replicas were made. Between the baseline and the 24-month recall, 51 representative samples were analyzed at 130 x magnification by use of a stereo light microscope (SLM). Recall rates were 83% after 6 months, 50% after 12 months, and 24% after 24 months. Failure rates after 24 months were 8% for Class I and 40% for Class II fillings, mainly due to bulk fracture at occlusally loaded areas (Kaplan Meier survival analysis). Significant changes over time were found for the criteria "surface roughness", "marginal integrity", "restoration integrity", and "overall judgement" (P < .05; Friedman test). SLM analysis revealed statistically significant differences for the following criteria over time (baseline/6 months/12 months (in % of entire evaluable margin length); P < .05; Friedman 2-way ANOVA): perfect margin 37/19/11, negative step formation 26/49/57, gap formation 2/7/9, and overhang 24/11/8. Replicas exhibited mainly negative step formation as main finding due to apparently inferior wear resistance (P < .05). Gap formations were more frequently observed in Class II restorations than in Class I (12% versus 3% after 12 months; P < .05, Mann-Whitney-U test). The evaluated margin lengths were not statistically different (P > .05, Friedman 2-way ANOVA).

No MeSH data available.


Related in: MedlinePlus

Kaplan-Meier survival curve.
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Related In: Results  -  Collection


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fig1: Kaplan-Meier survival curve.

Mentions: Details about clinical outcome of the GIC restorations are displayed in Table 1. After 12 months, 54 restorations were evaluated, and after 24 months of clinical service, 26 restorations were available for recall assessments. The reasons for not qualifying for recall visits were missed recall (n = 52), prosthetic measures like crown preparations (n = 10), and other non-material-specific reasons like extraction (n = 2). This means a drop-out rate of 76% over the 24-month period. Failure rates after 24 months were 8% for Class I and 40% for Class II restorations (Kaplan-Meier survival curve; Figure 1). Seventeen Class II restorations had to be replaced due to material-specific reasons (bulk fracture n = 9; hypersensitivity n = 4; gap formation n = 3; tooth fracture n = 1; complete loss of the restoration n = 1; Figures 1, 3, and 4).


Clinical Performance of Viscous Glass Ionomer Cement in Posterior Cavities over Two Years.

Frankenberger R, Garcia-Godoy F, Krämer N - Int J Dent (2010)

Kaplan-Meier survival curve.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2836880&req=5

fig1: Kaplan-Meier survival curve.
Mentions: Details about clinical outcome of the GIC restorations are displayed in Table 1. After 12 months, 54 restorations were evaluated, and after 24 months of clinical service, 26 restorations were available for recall assessments. The reasons for not qualifying for recall visits were missed recall (n = 52), prosthetic measures like crown preparations (n = 10), and other non-material-specific reasons like extraction (n = 2). This means a drop-out rate of 76% over the 24-month period. Failure rates after 24 months were 8% for Class I and 40% for Class II restorations (Kaplan-Meier survival curve; Figure 1). Seventeen Class II restorations had to be replaced due to material-specific reasons (bulk fracture n = 9; hypersensitivity n = 4; gap formation n = 3; tooth fracture n = 1; complete loss of the restoration n = 1; Figures 1, 3, and 4).

Bottom Line: Significant changes over time were found for the criteria "surface roughness", "marginal integrity", "restoration integrity", and "overall judgement" (P < .05; Friedman test).SLM analysis revealed statistically significant differences for the following criteria over time (baseline/6 months/12 months (in % of entire evaluable margin length); P < .05; Friedman 2-way ANOVA): perfect margin 37/19/11, negative step formation 26/49/57, gap formation 2/7/9, and overhang 24/11/8.Gap formations were more frequently observed in Class II restorations than in Class I (12% versus 3% after 12 months; P < .05, Mann-Whitney-U test).

View Article: PubMed Central - PubMed

Affiliation: Department of Operative Dentistry and Endodontics, Medical Center for Dentistry, University Medical Center Giessen and Marburg, Georg-Voigt-Street 3, 35039 Marburg, Germany.

ABSTRACT
In this controlled prospective clinical study the highly viscous glass ionomer cement Ketac Molar was clinically assessed in Class I and Class II cavities. Forty-nine subjects (mean age 32.3 years) received 108 restorations placed by six operators in conventional Black I and II type cavities with undercuts after excavating primary lesions or after removing insufficient restorations. At baseline, and after 6, 12, and 24 months, restorations were assessed by two independent investigators according to modified USPHS codes and criteria. Impressions of the restorations were taken and epoxy replicas were made. Between the baseline and the 24-month recall, 51 representative samples were analyzed at 130 x magnification by use of a stereo light microscope (SLM). Recall rates were 83% after 6 months, 50% after 12 months, and 24% after 24 months. Failure rates after 24 months were 8% for Class I and 40% for Class II fillings, mainly due to bulk fracture at occlusally loaded areas (Kaplan Meier survival analysis). Significant changes over time were found for the criteria "surface roughness", "marginal integrity", "restoration integrity", and "overall judgement" (P < .05; Friedman test). SLM analysis revealed statistically significant differences for the following criteria over time (baseline/6 months/12 months (in % of entire evaluable margin length); P < .05; Friedman 2-way ANOVA): perfect margin 37/19/11, negative step formation 26/49/57, gap formation 2/7/9, and overhang 24/11/8. Replicas exhibited mainly negative step formation as main finding due to apparently inferior wear resistance (P < .05). Gap formations were more frequently observed in Class II restorations than in Class I (12% versus 3% after 12 months; P < .05, Mann-Whitney-U test). The evaluated margin lengths were not statistically different (P > .05, Friedman 2-way ANOVA).

No MeSH data available.


Related in: MedlinePlus