Effect of desensitizing agents on the resin bond strength to sound dentin

被引:1
作者
Alawad, Fahad Ibrahim [1 ]
Araujo, Isaac Jordao de Souza [1 ,2 ]
de Carvalho, Ana Beatriz Gomes [1 ,3 ]
Neiva, Gisele de Faria [1 ]
Dennison, Joseph Debrune [1 ]
Yaman, Peter [1 ]
Bottino, Marco C. [1 ]
机构
[1] Univ Michigan, Sch Dent, Dept Cariol Restorat Sci & Endodont, 1011 N Univ Ave, Ann Arbor, MI 48109 USA
[2] Univ Tennessee, Dept Biosci Res, Hlth Sci Ctr, 19 S Manassas St, Memphis, TN 38163 USA
[3] Sao Paulo State Univ UNESP, Dept Dent Mat & Prosthodont, Av Eng Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos, SP, Brazil
关键词
Dentin bond strength; Dental composite; Dentin desensitizing agent; Hydroxyapatite; Silver diamine fluoride; NONCARIOUS CERVICAL LESIONS; SILVER DIAMINE FLUORIDE; HYPERSENSITIVITY; HYDROXYAPATITE; MICROTENSILE; SHEAR;
D O I
10.1007/s10266-023-00856-3
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
This study aimed to evaluate the effect of dentin hypersensitivity treatments on immediate and long-term shear bond strength (SBS) of composite restorations. Ninety non-carious extracted human molars were cut to expose dentin, which was embedded in acrylic resin, and randomly divided into three groups (n = 30/group) according to surface treatment: 1) no treatment (C and C*; control); 2) silver diamine fluoride with potassium iodide (SDF/KI and SDF/KI*; Riva Star); and 3) nano-hydroxyapatite (nHAp and nHAp*; PrevDent). The specimens were etched through the etch-and-rinse technique, followed by universal adhesive application and resin composite cylinders (2.38 mm in diameter x 3.5 mm high). The SBS was tested immediately (24 h after the restoration) and after thermocycling (*) (5000 cycles, 5 degrees C to 55 degrees C) at a 0.5 mm/min crosshead speed using a universal testing machine. A stereomicroscope was used to evaluate the mode of failure, and representative scanning electron microscopy (SEM) images were also acquired. Data normality was verified, and two-way ANOVA and Tukey's post hoc tests were performed for multiple comparisons (alpha = 0.05). The control group presented the highest SBS (27.10 MPa), while SDF/KI* had the lowest values (6.87 MPa). nHAp-based desensitizer exhibited higher SBS than SDF/KI for both immediate (22.6 MPa) and thermocycled (19.03 MPa) conditions. No intragroup difference was evidenced between immediate and thermocycled samples for any group. Most specimens for the C and nHAp groups presented mixed failure, while the SDF/KI groups presented comparable adhesive and mixed failures. The SBS of adhesive restorations after the application of desensitizing agents is material dependent, where SDF/KI reduces SBS values below the acceptable minimum bond strength, while the nHAp application meets the minimally required bond strength.
引用
收藏
页码:435 / 443
页数:9
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