Limits...
A comparative evaluation of the effect of dentin desensitizers on the retention of complete cast metal crowns.

Chandavarkar SM, Ram SM - Contemp Clin Dent (2015)

Bottom Line: The samples were tested using a universal testing machine by applying a load at a crosshead speed of 0.5 mm/min.Statistical analysis included One-way ANOVA, followed by the Scheffe post-hoc test with P < 0.05.On comparing the effect of prepared virgin dentin, GLU based primer, CPP-ACP, LASER and Pro-Argin on the retention of complete cast metal crowns luted with glass ionomer cement on prepared teeth, it can be concluded that Pro-Argin and CPP-ACP showed the best retention in this in vitro study.

View Article: PubMed Central - PubMed

Affiliation: Bethany Hospital, Thane, STVJS Charitable Trust, Thane, Shri Vagad Welfare Hospital, Kutch, India.

ABSTRACT

Context: Desensitizers are used to reduce dentin hypersensitivity. They affect the surface texture of prepared dentin and may alter the retention of fixed restorations.

Aims: The aim was to evaluate the effect of dentin desensitizers on the retention of complete cast metal crowns luted with glass ionomer cement.

Subjects and methods: Fifty freshly extracted human premolars were subjected to standardized tooth preparation (20° total convergence, 4 mm axial height) with a computer numerically controlled machine. Individual cast metal crowns were fabricated from a base metal alloy. Dentin desensitizers included none (control), a glutaraldehyde (GLU) based primer (Gluma desensitizer), casein phosphopeptide (CPP)-amorphous calcium phosphate (ACP) (GC Mousse), erbium, chromium: YSGG laser (Waterlase MD Turbo, Biolase) and Pro-Argin (Colgate Sensitive Pro-Relief desensitizing polishing paste). After desensitization, crowns were luted with glass ionomer cement and kept for 48 h at 37°C in 100% relative humidity. The samples were tested using a universal testing machine by applying a load at a crosshead speed of 0.5 mm/min.

Statistical analysis used: Statistical analysis included One-way ANOVA, followed by the Scheffe post-hoc test with P < 0.05.

Results: All dentin desensitizers showed significantly different values: Pro-Argin (4.10 Megapascals [Mpa]) < CPP-ACP (4.01 mpa) < GLU based primer (3.87 Mpa) < Virgin dentin (3.65 Mpa) < LASER (3.37 Mpa).

Conclusions: On comparing the effect of prepared virgin dentin, GLU based primer, CPP-ACP, LASER and Pro-Argin on the retention of complete cast metal crowns luted with glass ionomer cement on prepared teeth, it can be concluded that Pro-Argin and CPP-ACP showed the best retention in this in vitro study.

No MeSH data available.


Related in: MedlinePlus

Boxed elastomeric impression of the prepared teeth
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4374318&req=5

Figure 1: Boxed elastomeric impression of the prepared teeth

Mentions: Five acrylic fixtures along with their respective prepared teeth were joined to each other using cyanoacrylate to form one unit. Cellophane and Spacer wax were adapted over the teeth. Autopolymerizing acrylic resin custom trays were fabricated over the prepared teeth for all 10 units. The custom trays were retrieved, the cellophane and spacer wax removed. Universal tray adhesive was applied in one thin layer on the entire inner surface of the tray and allowed to remain for 1 min. Accurate single step impressions[14] with putty and light body polyvinyl siloxane, elastomeric material were made for all the teeth [Figure 1]. The elastomeric impressions were boxed and poured in die stone to approximately 1 cm thickness and allowed to set. The casts were retrieved after an hour and individual dies were made for each tooth.[1516] After the dies were completely dry, one coat of the die hardener was applied to each die, followed by three coats of die spacer to allow space (25 μ) for the luting agent.[917] The die spacer was kept 1 mm short of the finish line to allow intimate adaptation of the wax pattern at the margins.[1819] A dip in wax method was used to fabricate the wax pattern of 1 mm thickness.[910] On the center of the occlusal surface of the wax pattern, a 10 mm diameter ring made of uniform thickness of sprue wax was attached [Figure 2].[18] The ring would be cast in metal as part of the crown, which would enable testing of the samples on the Universal Testing machine. This procedure was followed for all the 50 dies.


A comparative evaluation of the effect of dentin desensitizers on the retention of complete cast metal crowns.

Chandavarkar SM, Ram SM - Contemp Clin Dent (2015)

Boxed elastomeric impression of the prepared teeth
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4374318&req=5

Figure 1: Boxed elastomeric impression of the prepared teeth
Mentions: Five acrylic fixtures along with their respective prepared teeth were joined to each other using cyanoacrylate to form one unit. Cellophane and Spacer wax were adapted over the teeth. Autopolymerizing acrylic resin custom trays were fabricated over the prepared teeth for all 10 units. The custom trays were retrieved, the cellophane and spacer wax removed. Universal tray adhesive was applied in one thin layer on the entire inner surface of the tray and allowed to remain for 1 min. Accurate single step impressions[14] with putty and light body polyvinyl siloxane, elastomeric material were made for all the teeth [Figure 1]. The elastomeric impressions were boxed and poured in die stone to approximately 1 cm thickness and allowed to set. The casts were retrieved after an hour and individual dies were made for each tooth.[1516] After the dies were completely dry, one coat of the die hardener was applied to each die, followed by three coats of die spacer to allow space (25 μ) for the luting agent.[917] The die spacer was kept 1 mm short of the finish line to allow intimate adaptation of the wax pattern at the margins.[1819] A dip in wax method was used to fabricate the wax pattern of 1 mm thickness.[910] On the center of the occlusal surface of the wax pattern, a 10 mm diameter ring made of uniform thickness of sprue wax was attached [Figure 2].[18] The ring would be cast in metal as part of the crown, which would enable testing of the samples on the Universal Testing machine. This procedure was followed for all the 50 dies.

Bottom Line: The samples were tested using a universal testing machine by applying a load at a crosshead speed of 0.5 mm/min.Statistical analysis included One-way ANOVA, followed by the Scheffe post-hoc test with P < 0.05.On comparing the effect of prepared virgin dentin, GLU based primer, CPP-ACP, LASER and Pro-Argin on the retention of complete cast metal crowns luted with glass ionomer cement on prepared teeth, it can be concluded that Pro-Argin and CPP-ACP showed the best retention in this in vitro study.

View Article: PubMed Central - PubMed

Affiliation: Bethany Hospital, Thane, STVJS Charitable Trust, Thane, Shri Vagad Welfare Hospital, Kutch, India.

ABSTRACT

Context: Desensitizers are used to reduce dentin hypersensitivity. They affect the surface texture of prepared dentin and may alter the retention of fixed restorations.

Aims: The aim was to evaluate the effect of dentin desensitizers on the retention of complete cast metal crowns luted with glass ionomer cement.

Subjects and methods: Fifty freshly extracted human premolars were subjected to standardized tooth preparation (20° total convergence, 4 mm axial height) with a computer numerically controlled machine. Individual cast metal crowns were fabricated from a base metal alloy. Dentin desensitizers included none (control), a glutaraldehyde (GLU) based primer (Gluma desensitizer), casein phosphopeptide (CPP)-amorphous calcium phosphate (ACP) (GC Mousse), erbium, chromium: YSGG laser (Waterlase MD Turbo, Biolase) and Pro-Argin (Colgate Sensitive Pro-Relief desensitizing polishing paste). After desensitization, crowns were luted with glass ionomer cement and kept for 48 h at 37°C in 100% relative humidity. The samples were tested using a universal testing machine by applying a load at a crosshead speed of 0.5 mm/min.

Statistical analysis used: Statistical analysis included One-way ANOVA, followed by the Scheffe post-hoc test with P < 0.05.

Results: All dentin desensitizers showed significantly different values: Pro-Argin (4.10 Megapascals [Mpa]) < CPP-ACP (4.01 mpa) < GLU based primer (3.87 Mpa) < Virgin dentin (3.65 Mpa) < LASER (3.37 Mpa).

Conclusions: On comparing the effect of prepared virgin dentin, GLU based primer, CPP-ACP, LASER and Pro-Argin on the retention of complete cast metal crowns luted with glass ionomer cement on prepared teeth, it can be concluded that Pro-Argin and CPP-ACP showed the best retention in this in vitro study.

No MeSH data available.


Related in: MedlinePlus