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Journal of Peking University(Health Sciences) ›› 2019, Vol. 51 ›› Issue (1): 43-48. doi: 10.19723/j.issn.1671-167X.2019.01.008

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Effect of a novel cold atmospheric plasma jet treatment with different temperatures on resin-dentin bonding

Xiao-ming ZHU1,Xuan QI2,De-li LI1,Yu-wei ZHANG3,He-ping LI4,Jian-guo TAN2,△()   

  1. 1. Second Clinical Division, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100101, China
    2. Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
    3. Department of Stomatology, Aerospace Center Hospital, Beijing 100049, China
    4. Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • Received:2018-10-11 Online:2019-02-18 Published:2019-02-26
  • Contact: Jian-guo TAN E-mail:kqtanjg@bjmu.edu.cn
  • Supported by:
    Supported by the National Natural Science Fondation of China(812200805)

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Abstract:

Objective: To investigate the effect of different treatment temperatures of a novel cold atmospheric plasma jet treatment on the resin-dentin bonding. Methods:(1) Fifty-two freshly extracted, non-carious and intact third molars were collected. The occlusal one-third of the crown was removed by means of a water-cooled low-speed Isomet saw. One dentin disc [(900 ±100) μm] was prepared for each tooth. The fifty-two dentin discs were randomly divided into control group and experimental groups, of which four were in control group, and forty-eight were divided into four experimental groups according to the different treatment temperatures (4 ℃, 10 ℃, 20 ℃ and 30 ℃) of the novel radio-frequency atmospheric-pressure glow discharge (RF-APGD) plasma jet, twelve in each group. Each experimental group was divided into three subgroups according to different treatment time (10 s, 20 s and 30 s), with four in each subgroup. The occlusal one-third of the crown was removed by means of a water-cooled low-speed Isomet saw. The morphology of demineralized dentin surfaces was analyzed using field emission scanning electron microscopy. (2) Twenty unerupted, non-carious and intact third molars were randomly divided into five groups, four in each group: control group, untreated; 4 ℃, 10 ℃, 20 ℃ and 30 ℃ experimental groups, each group was treated with the RF-APGD plasma jet for 20 s. The micro-tensile resin dentin bond strength was tested after 20 s RF-APGD plasma jet treatment with different temperatures, using a universal mechanical machine. Results:(1)The field emission scanning electron micro-scopy results indicated that when compared with the control group, a 10 s RF-APGD plasma jet treatment with 30 ℃ and 20 ℃ collapsed the collagen scaffold. Collagen fibrils maintained an uncollapsed three-dimensional structure after the 4 ℃ RF-APGD plasma jet treatment for even 30 s treatment. (2) The microtensile resin dentin bond strength results of the 4 ℃ RF-APGD plasma jet treatment group (57.8±0.7) MPa were significantly higher than that of the control group [(47.4±0.5) MPa] and 10 s, 20 s and 30 s RF-APGD plasma treatment group [(51.9±0.7) MPa,(29.7±1.0) MPa and (22.2±1.5) MPa] with statistically significant difference (P<0.05). Compared with the control group, the micro-tensile bond strength increased about 21.9% and 9.5% after 4 ℃ and 10 ℃ RF-APGD plasma jet treatment, respectively. Conclusion:Compared with other treatment temperatures, this novel RF-APGD plasma jet treatment with the temperature of 4 ℃ can preserve the three-dimensional morphology of demineralized dentin better, and can improve the resin-dentin bonding.

Key words: Plasma, Dentin collagen, Micro-tensile bond strength

CLC Number: 

  • R783.4

Figure 1

Typical field emission scanning electron microscopy micrographs of the untreated acid-etched dentin and the acid-etched dentin treated by the 30 ℃ RF-APGD plasma jet for different treatment times A,control;B, 10 s;C, 20 s;D, 30 s."

Figure 2

Typical field emission scanning electron microscopy micrographs of the acid-etched dentin treated by the 20 ℃ RF-APGD plasma jet for different treatment times A, 10 s; B, 20 s; C, 30 s."

Figure 3

Typical field emission scanning electron microscopy micrographs of the acid-etched dentin treated by the 10 ℃ RF-APGD plasma jet for different treatment times A, 10 s; B, 20 s; C, 30 s."

Figure 4

Typical field emission scanning electron microscopy micrographs of the acid-etched dentin treated by the 4 ℃ RF-APGD plasma jet for different treatment times A, 10 s; B, 20 s; C, 30 s."

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