Fracture resistance of incisal tooth fragment reattached with different adhesive materials and retentive techniques

Q4 Dentistry

Revista Odonto Ciencia Pub Date : 2018-07-25 DOI:10.15448/1980-6523.2017.4.28095

F. Coelho-de-Souza, G. Fossa, Flávia de Ávila Pereira, C. Klein-Junior, M. Erhardt, Thaís Thomé

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引用次数: 1

Abstract

OBJECTIVE: This study evaluated in vitro the shear bond strength of experimentally fractured human tooth fragments reattached with different adhesive materials and retentive techniques.METHODS: Forty-eight sound mandibular incisors were randomly divided into 6 groups (n=8). Their incisal edges were cut off in 5 groups, representing an enamel-dentin fracture. Intact teeth were used as control (Group 1). The fragment edges were reattached with adhesive system (Scotch Bond Multipurpose – 3M ESPE) (Group 2), adhesive system and composite resin (ICE – SDI) (Group 3), adhesive system and composite resin with circumferential bevel (Group 4), adhesive system and composite resin with internal dentin groove (Group 5), and adhesive system and composite resin with the circumferential bevel and internal dentin groove (Group 6). Shear bond strength was determined in a universal testing machine. Fracture modes were identified by light microscope. Kruskal-Wallis was used to analysis resistance to fracture and fracture patterns.RESULTS: The results showed statistically significant differences (p<0.05) among groups. The intact teeth (Group 1) showed higher fracture resistance than the other groups. Groups 2 and 6 did not differ and were statistically superior to other techniques. Group 4 presented statistically higher than in Group 5, which in turn was more resistant than Group 3.CONCLUSIONS: None of the fragment reattachment techniques was able to achieve the strength of sound teeth. Fragments reattached only with adhesive system or with adhesive system and composite resin with the circumferential bevel and internal dentin groove showed the best performance for resistance to fracture.

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不同粘接材料和固位技术对切牙碎片再附着的抗折性研究

目的：本研究在体外评估了不同粘接材料和固位技术对实验性断裂的人类牙齿碎片的剪切结合强度。方法：将48颗健康的下颌切牙随机分为6组（n=8）。他们的切缘被分为5组，代表牙釉质-牙本质骨折。使用完整的牙齿作为对照（第1组）。碎片边缘用粘合剂系统（Scotch Bond Multipurpose–3M ESPE）（第2组）、粘合剂系统和复合树脂（ICE–SDI）（第3组）、具有周向斜面的粘合剂系统和合成树脂（第4组）、粘合系统和具有内牙本质槽的复合树脂（第5组）重新连接，以及具有周向斜面和内部牙本质凹槽的粘合剂系统和复合树脂（第6组）。剪切结合强度在通用试验机中测定。通过光学显微镜鉴定断裂模式。Kruskal-Wallis用于分析断裂阻力和断裂模式。结果：各组间差异有统计学意义（p<0.05）。完整的牙齿（第1组）显示出比其他组更高的抗断裂性。第2组和第6组没有差异，并且在统计学上优于其他技术。第4组的表现在统计学上高于第5组，而第5组又比第3组更有抵抗力。结论：没有一种碎片再附着技术能够达到健全牙齿的强度。仅用粘接系统或用粘接系统和具有周向斜面和内牙本质凹槽的复合树脂粘接的碎片显示出最佳的抗断裂性能。

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来源期刊

Revista Odonto Ciencia Dentistry-Dentistry (all)

CiteScore

0.30

自引率

0.00%

发文量

期刊介绍： Cessation. The Revista Odonto Ciência is a peer-reviewed journal published online (ISSN 1980-6523), four times per year, supported by the Pontifical Catholic University of Rio Grande do Sul – Dental School since 1986. Its abbreviation is Rev Odonto Cienc, which should be used in references, bibliographic legends, and footnotes. The Revista Odonto Ciência is an international scientific journal dedicated to provide a forum for academics, researchers, and practitioners to communicate relevant basic, clinical, education, and epidemiological studies in Dentistry and related fields. The Journal seeks to publish articles on new conceptual models, innovative technology, alternative procedures or treatment to reduce disease burden in the general population or specific groups, thus contributing to translating science into practice and social development. Contributions falling into the following categories will be considered for publication: 1) original research reports of basic and applied oral sciences, epidemiological, and education studies; 2) review article; 3) case report. The Revista Odonto Ciência only accepts manuscripts written in English. Manuscripts submitted to this journal should not have been published before nor have publication pending elsewhere.