RESUMO
The purpose of this study was to determine the ion release from four commercially available pit-and-fissure sealants [3M Clinpro,3M ConciseTM,BeautiSealant (BS),and GI FX-Ⅱ)].With each brand,18 specimens were prepared.Their fluoride release in de-ionized water was measured by fluoride electrode,while the release of silicate (Si),aluminum (A1),sodium (Na),calcium (Ca),strontium (Sr),and phosphorus (P) was measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES) on days 1,3,7,14,21,and 28.The result showed that fluoride was not released from 3M ConciseTM.GI FX-Ⅱ displayed the largest fluoride release,which,however,dropped rapidly on day 3.3M Clinpro exhibited less fluoride release than GI FX-Ⅱ and BS did.At any time during the 28-day experimental period,GI FX-Ⅱ released more Na than the other sealants (P＜0.001).BS ranked the second in Na release,and a small amount of Na ions was released from the 3M Clinpro and 3M ConciseTM samples.A1 ions were only detected from BS and GI FX-Ⅱ,but not from the 3M Clinpro and 3M ConciseTM.Additionally GI FX-Ⅱ had the largest Si release among the four brands at any time during the experimental period (P＜0.001).Ca ions were detected from 3M Clinpro and 3M ConciseTM,but not from GI FX-Ⅱ.BS released more Sr than the other sealants at any time during the experimental period (P＜0.001).All the samples released similar amounts of P continuously during these 28 days.In conclusion,based on the type and the amount of ion release,BS is the best pit-and-fissure sealant among the four brands.
RESUMO
The purpose of this study was to determine the ion release from four commercially available pit-and-fissure sealants [3M Clinpro,3M ConciseTM,BeautiSealant (BS),and GI FX-Ⅱ)].With each brand,18 specimens were prepared.Their fluoride release in de-ionized water was measured by fluoride electrode,while the release of silicate (Si),aluminum (A1),sodium (Na),calcium (Ca),strontium (Sr),and phosphorus (P) was measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES) on days 1,3,7,14,21,and 28.The result showed that fluoride was not released from 3M ConciseTM.GI FX-Ⅱ displayed the largest fluoride release,which,however,dropped rapidly on day 3.3M Clinpro exhibited less fluoride release than GI FX-Ⅱ and BS did.At any time during the 28-day experimental period,GI FX-Ⅱ released more Na than the other sealants (P＜0.001).BS ranked the second in Na release,and a small amount of Na ions was released from the 3M Clinpro and 3M ConciseTM samples.A1 ions were only detected from BS and GI FX-Ⅱ,but not from the 3M Clinpro and 3M ConciseTM.Additionally GI FX-Ⅱ had the largest Si release among the four brands at any time during the experimental period (P＜0.001).Ca ions were detected from 3M Clinpro and 3M ConciseTM,but not from GI FX-Ⅱ.BS released more Sr than the other sealants at any time during the experimental period (P＜0.001).All the samples released similar amounts of P continuously during these 28 days.In conclusion,based on the type and the amount of ion release,BS is the best pit-and-fissure sealant among the four brands.
RESUMO
OBJECTIVES: The purpose of this study was to evaluate abrasion of Icon(R) infiltrated, sound bovine enamel by using confocal laser scanning microscopy (CLSM) after toothbrush abrasion tests. METHODS: Sound bovine enamel specimens whose Vickers Hardness Number ranged from 280 to 320 were prepared. To measure abrasion, specimens were allocated to groups on the basis of tooth brushing stroke frequencies. Tooth brushing stroke frequencies were categorized into 5 groups: 1,800, 5,400, 10,800, 21,600 and 43,200 strokes. Both infiltration depth of Icon(R) and the abrasion depth were measured by CLSM. RESULTS: Mean infiltration depth of Icon(R) for sound bovine enamel was 98.6 microm. There was no statistically significant difference in enamel abrasion depth between groups with 5,400 strokes and 10,800 strokes, but the abrasion depth increased with further increase in tooth brushing stroke frequencies (P<0.001). The mean abrasion depth of resin infiltrated bovine enamel after 43,200 tooth brushing strokes was 17.45 microm. CONCLUSIONS: The magnitude of abrasion after 43,200 tooth brushing strokes, which corresponds to brushing 3 times a day for 4 years, was less than 20 microm. This result suggests that abrasion by tooth brushing would not be a clinical problem for resin infiltrated enamel.
Assuntos
Cárie Dentária , Esmalte Dentário , Dureza , Microscopia Confocal , Acidente Vascular Cerebral , DenteRESUMO
Objective : The purpose of this in vitro study was to evaluate the effect of different techniques of surface preparation on the microleakage of a sealant applied with traditional acid etching and self-etched bonding agent. Study Design : A total of 60 extracted third molars were randomly assigned into six groups (n = 10/each). The occlusal surfaces were sealed with a sealant (Clinpro) after one of the following pretreatments: (1) phosphoric acid etching; (2) Prompt L-Pop; (3) laser + etching; (4) laser + Prompt L-Pop; (5) air abrasion + etching; (6) air abrasion + Prompt L-Pop. The specimens were immersed in a 0.5% basic fuchsin solution. Buccolingual cuts parallel to the long axis of the tooth were made. The surfaces were scored 0--2 for extent of microleakage using a microscope and the data were analyzed statistically. Results : The poorest results were obtained with laser + Prompt L-Pop which showed a greater number of specimens with microleakage (80%). Air abrasion surface preparation + phosphoric acid etching showed less microleakage than the other groups (40%). Kruskal--Wallis and t-tests revealed no significant difference in microleakage between six groups. Conclusion : The self-etching adhesive studied seems an attractive alternative to the acid-etch technique for sealant application in young children where simplifications in the clinical procedure are warranted. No significant difference was noted between the different types of enamel preparation before fissure sealant.