1
|
de Freitas BN, Tonin BSH, Zaparolli D, Faria ACL, Toniollo MB, Ribeiro RF, Macedo AP. Mechanical comparison of milled fiber-reinforced resin composite and Co-Cr frameworks with different connector cross-sectional geometries: An in vitro study. J Mech Behav Biomed Mater 2023; 141:105759. [PMID: 36905707 DOI: 10.1016/j.jmbbm.2023.105759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 03/08/2023]
Abstract
This study compared the effect of using milled fiber-reinforced resin composite and Co-Cr (milled wax and lost-wax technique) frameworks for 4-unit implant-supported partial fixed dental prostheses; and also, evaluated the influence of the connector's cross-sectional geometries on the mechanical behavior. Three groups of milled fiber-reinforced resin composite (TRINIA) for 4-unit implant-supported frameworks (n = 10) with three connectors geometries (round, square, or trapezoid), and three groups of Co-Cr alloy frameworks manufactured by milled wax/lost wax and casting technique, were analyzed. The marginal adaptation was measured before cementation using an optical microscope. Then, the samples were cemented, thermomechanical cycled (load of 100 N/2 Hz, 106 cycles; 5, 37, and 55 ᵒC, a total of 926 cycles at each one), and cementation and flexure strength (maximum force) analyzed. Analysis of stress distribution in framework veneered considering resin and ceramic properties for fiber-reinforced and Co-Cr frameworks, respectively, implant, and bone was by finite element analysis under three contact points (100 N) on the central region. ANOVA and Multiple paired test-t with Bonferroni adjustment (α = 0.05) were used for data analysis. Fiber-reinforced frameworks showed better vertical adaptation (mean ranged from 26.24 to 81.48 μm) compared to the Co-Cr frameworks (mean ranged from 64.11 to 98.12 μm), contrary to horizontal adaptation (respectively, means ranged from 281.94 to 305.38 μm; and from 150.70 to 174.82 μm). There were no failures during the thermomechanical test. Cementation strength showed three times higher for Co-Cr compared to fiber-reinforced framework, as well as flexural strength (P < .001). Regarding stress distribution, fiber-reinforced had a pattern of concentration in the implant-abutment complex. There were no significant differences in stress values or changes observed among the different connector geometries or framework materials. Trapezoid connector geometry had a worse performance for marginal adaptation, cementation (fiber-reinforced 132.41 N; Co-Cr 255.68 N) and flexural strength (fiber-reinforced 222.57 N; Co-Cr 614.27 N). Although the fiber-reinforced framework showed lower cementation and flexural strength, considering the stress distribution values and absence of failures in the thermomechanical cycling test, it can be considered for use as a framework for 4-unit implant-supported partial fixed dental prostheses in the posterior mandible. Besides, results suggest that trapezoid connectors mechanical behavior did not perform well compared to round or square geometries.
Collapse
Affiliation(s)
- Bruna Neves de Freitas
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| | - Bruna Santos Honório Tonin
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| | - Danilo Zaparolli
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| | - Adriana Claudia Lapria Faria
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| | - Marcelo Bighetti Toniollo
- Dental School of Rio Verde, University of Rio Verde, Fazenda Fontes do Saber, Rio Verde, Goiás, 75901-970, Brazil.
| | - Ricardo Faria Ribeiro
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| | - Ana Paula Macedo
- University of São Paulo, School of Dentistry of Ribeirão Preto, Department of Dental Materials and Prosthodontics, Ave. Café, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
| |
Collapse
|
2
|
Oishi S, Komada W, Tsukahara R, Yoshimatsu S, Kondo D, Omori S, Nozaki K, Miura H, Fueki K. A composite resin core with a new zirconia tube reduces the surface strain at the cervical area of a mandibular molar: A model tooth study. J Prosthodont Res 2023; 67:70-76. [PMID: 35249930 DOI: 10.2186/jpr.jpr_d_21_00243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE This study aimed to evaluate the surface strain at the cervical area of endodontically treated molars with a large pulp chamber restored using a composite resin core with three different types of core build-up systems. METHODS Reproduction models of human mandibular molars with prepared post spaces were used in this study. Roots duplicated with a composite resin were used as the experimental teeth. Three types of core build-up systems were used: composite resin core(RC), composite resin core with fiber posts (FC), and composite resin core with a prefabricated zirconia tube (ZC). Each group comprised eight specimens. Crowns made of yttria partially stabilized zirconia were cemented with dual-cure resin cement. Four strain gauges were attached to the surfaces of each specimen: the cervical area of the root and crown, on the buccal and lingual sides. The surface strain at each cervical area was measured using a static loading test and statistically analyzed. RESULTS In the case of static loading to the buccal cusp inner slope, ZC showed a significantly lower strain than RC in the crown on the buccal side and in the root and FC in the root. In the central fossa, ZC showed a significantly lower strain than FC in the root on the lingual side. CONCLUSIONS The prefabricated zirconia tube reduced the surface strain at the cervical area of the buccal/lingual root in molars; however, the effect was small in the cervical area of the crown.
Collapse
Affiliation(s)
- Shinya Oishi
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Wataru Komada
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Ruri Tsukahara
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Shu Yoshimatsu
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Daiki Kondo
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Satoshi Omori
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kosuke Nozaki
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hiroyuki Miura
- Department of Fixed Prosthodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kenji Fueki
- Department of Masticatory Function and Health Science, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| |
Collapse
|
3
|
KURODA S, SHINYA A, GOMI H. Effect of frame design on the fracture strength of a zirconia crown and porcelain-faced crown. Dent Mater J 2019; 38:323-328. [DOI: 10.4012/dmj.2017-218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Soichi KURODA
- Department of Crown and Bridge, The Nippon Dental University, School of Life Dentistry at Tokyo
| | - Akikazu SHINYA
- Department of Crown and Bridge, The Nippon Dental University, School of Life Dentistry at Tokyo
- Department of Prosthetic Dentistry and Biomaterials Science, Institute of Dentistry, University of Turku
| | - Harunori GOMI
- Department of Crown and Bridge, The Nippon Dental University, School of Life Dentistry at Tokyo
| |
Collapse
|
4
|
ISHIKAWA Y, KOMADA W, INAGAKI T, NEMOTO R, OMORI S, MIURA H. The effects of post and core material combination on the surface strain of the 4-unit zirconia fixed partial denture margins. Dent Mater J 2017; 36:798-808. [DOI: 10.4012/dmj.2016-343] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yoko ISHIKAWA
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| | - Wataru KOMADA
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| | - Tasuku INAGAKI
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| | - Reina NEMOTO
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| | - Satoshi OMORI
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| | - Hiroyuki MIURA
- Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
| |
Collapse
|
5
|
Effect of fiber posts on the fracture resistance of maxillary central incisors with Class III restorations: An in vitro study. J Prosthet Dent 2016; 118:55-60. [PMID: 27863859 DOI: 10.1016/j.prosdent.2016.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 09/16/2016] [Accepted: 09/19/2016] [Indexed: 11/22/2022]
Abstract
STATEMENT OF PROBLEM Endodontically treated teeth with Class III restorations show reduced fracture resistance. The placement of glass fiber posts may affect fracture resistance and should be further evaluated. PURPOSE The purpose of this in vitro study was to evaluate the effect of fiber posts on the fracture resistance of endodontically treated maxillary central incisors with Class III restorations. MATERIAL AND METHODS Forty extracted human maxillary central incisors were selected and divided into 4 test groups (n=10 each) according to the restoration strategy: control group; endodontically treated teeth without endodontic posts (GHT); endodontically treated teeth with 2 Class III restorations simulating coronal destruction (GCT); endodontically treated teeth with 2 Class III restorations and a carbon fiber post (GCF); and endodontically treated teeth with 2 Class III restorations and a glass-fiber post (GGF). The fiber posts were adhesively cemented with composite resin cement, and the cavities were restored with composite resin. After 3 months of water storage, all specimens were loaded at 45 degrees in a universal testing machine until fracture and evaluated for fracture mode. The data were analyzed using 1-way ANOVA, followed by the Tukey honest significant difference multiple comparisons test (α=.05). RESULTS Mean ±SD failure loads ranged from 687.5 ±84.0 N to 943.8 ±93.1 N. One-way ANOVA revealed a statistically significant difference among the groups (P≤.05). The control group (GHT) had significantly higher resistance to fracture than the other groups (P≤.05). CONCLUSIONS Within the limitations of this in vitro study, placement of a fiber post did not affect the fracture resistance of endodontically treated maxillary central incisors with 2 Class III restorations.
Collapse
|