Limits...
Comparative evaluation of sodium hypochlorite and microwave disinfection on dimensional stability of denture bases.

Nirale RM, Thombre R, Kubasad G - J Adv Prosthodont (2012)

Bottom Line: The 1.5 mm of thickness-specimens (n = 20) were relined with 1.5 mm of autopolymerizing relining resin.Data were analyzed using student paired 't' and unpaired 't' test.Chemical disinfection with sodium hypochlorite seems to be a safer method of disinfection with regards to physical properties such as changes in dimensional stability.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Maharashtra, India.

ABSTRACT

Purpose: To compare the effect of sodium hypochlorite and microwave disinfection on the dimensional stability of denture bases without and with relining.

Materials and methods: A brass die was prepared by simulating an edentulous maxillary arch. It was used to fabricate 1.5 mm and 3 mm of thickness denture bases (n = 40). The 1.5 mm of thickness-specimens (n = 20) were relined with 1.5 mm of autopolymerizing relining resin. Five holes were prepared over crest of ridge of brass die with intimately fitting stainless steel pins which were transferred to the intaglio surface of specimens during fabrication of denture bases. For calculation of dimensional changes in denture bases, differences between the baseline area before and after disinfection of the specimens were used. The denture bases without and with relining were divided into 2 groups (each n = 20). Data were analyzed using student paired 't' and unpaired 't' test.

Results: Microwave disinfection produces significant shrinkage in both denture bases without relining (t = 17.16; P<.001) and with relining (t = 14.9; P<.001). Denture bases without relining showed more shrinkage when compared with relined denture bases after microwave disinfection (t = 6.09; P<.001). The changes in dimensional stability after sodium hypochlorite disinfection were not significant for both denture bases without relining (t = 2.19; P=.056) and denture bases with relining (t = 2.17; P=.058).

Conclusion: Microwave disinfection leads to increased shrinkage of denture bases without and with relining. Chemical disinfection with sodium hypochlorite seems to be a safer method of disinfection with regards to physical properties such as changes in dimensional stability.

No MeSH data available.


Related in: MedlinePlus

Effect of microwave disinfection on dimensional stability of denture bases without and with relining.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3303917&req=5

Figure 9: Effect of microwave disinfection on dimensional stability of denture bases without and with relining.

Mentions: Table 1 shows the difference in total surface areas before and after sodium hypochlorite and microwave disinfection of denture bases without and with relining. Table 2 shows the effect of sodium hypochlorite and microwave disinfection on dimensional stability of denture bases with and without relining. After sodium hypochlorite disinfection, this difference was not significant for both denture bases without relining (t = 2.19; P=.056) and denture bases with relining (t = 2.17; P=.058) (Fig. 8). While after microwave disinfection, this difference was highly significant for both denture bases without relining (t = 17.16; P<.001) and denture bases with relining (t = 14.90; P<.001) (Fig. 9). Table 3 shows the comparison of dimensional stability of denture bases without and with relining after disinfection by sodium hypochlorite and microwave disinfection. This clearly shows that the microwave disinfection produced significant change in dimensional stability of denture bases without relining when compared with dimensional stability of denture bases with relining (t = 6.09; P<.001) (Fig. 10).


Comparative evaluation of sodium hypochlorite and microwave disinfection on dimensional stability of denture bases.

Nirale RM, Thombre R, Kubasad G - J Adv Prosthodont (2012)

Effect of microwave disinfection on dimensional stability of denture bases without and with relining.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3303917&req=5

Figure 9: Effect of microwave disinfection on dimensional stability of denture bases without and with relining.
Mentions: Table 1 shows the difference in total surface areas before and after sodium hypochlorite and microwave disinfection of denture bases without and with relining. Table 2 shows the effect of sodium hypochlorite and microwave disinfection on dimensional stability of denture bases with and without relining. After sodium hypochlorite disinfection, this difference was not significant for both denture bases without relining (t = 2.19; P=.056) and denture bases with relining (t = 2.17; P=.058) (Fig. 8). While after microwave disinfection, this difference was highly significant for both denture bases without relining (t = 17.16; P<.001) and denture bases with relining (t = 14.90; P<.001) (Fig. 9). Table 3 shows the comparison of dimensional stability of denture bases without and with relining after disinfection by sodium hypochlorite and microwave disinfection. This clearly shows that the microwave disinfection produced significant change in dimensional stability of denture bases without relining when compared with dimensional stability of denture bases with relining (t = 6.09; P<.001) (Fig. 10).

Bottom Line: The 1.5 mm of thickness-specimens (n = 20) were relined with 1.5 mm of autopolymerizing relining resin.Data were analyzed using student paired 't' and unpaired 't' test.Chemical disinfection with sodium hypochlorite seems to be a safer method of disinfection with regards to physical properties such as changes in dimensional stability.

View Article: PubMed Central - PubMed

Affiliation: Department of Prosthodontics, Sharad Pawar Dental College and Hospital, Maharashtra, India.

ABSTRACT

Purpose: To compare the effect of sodium hypochlorite and microwave disinfection on the dimensional stability of denture bases without and with relining.

Materials and methods: A brass die was prepared by simulating an edentulous maxillary arch. It was used to fabricate 1.5 mm and 3 mm of thickness denture bases (n = 40). The 1.5 mm of thickness-specimens (n = 20) were relined with 1.5 mm of autopolymerizing relining resin. Five holes were prepared over crest of ridge of brass die with intimately fitting stainless steel pins which were transferred to the intaglio surface of specimens during fabrication of denture bases. For calculation of dimensional changes in denture bases, differences between the baseline area before and after disinfection of the specimens were used. The denture bases without and with relining were divided into 2 groups (each n = 20). Data were analyzed using student paired 't' and unpaired 't' test.

Results: Microwave disinfection produces significant shrinkage in both denture bases without relining (t = 17.16; P<.001) and with relining (t = 14.9; P<.001). Denture bases without relining showed more shrinkage when compared with relined denture bases after microwave disinfection (t = 6.09; P<.001). The changes in dimensional stability after sodium hypochlorite disinfection were not significant for both denture bases without relining (t = 2.19; P=.056) and denture bases with relining (t = 2.17; P=.058).

Conclusion: Microwave disinfection leads to increased shrinkage of denture bases without and with relining. Chemical disinfection with sodium hypochlorite seems to be a safer method of disinfection with regards to physical properties such as changes in dimensional stability.

No MeSH data available.


Related in: MedlinePlus