Contact fracture test of monolithic hybrid ceramics on different substrates for bruxism

Lan, Ting-Hsun; Chen, Ping-Ho; Fok, Alex; Chen, Yufeng

doi:10.1016/j.dental.2021.10.010

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…Also, the presence of pain or discomfort could limit the execution of the maximum bite force [35][36][37][38]. Finally, individuals diagnosed with bruxism were also excluded from the study, as according to some authors [39][40][41].…”

Section: Discussionmentioning

confidence: 99%

Association of Non-carious Cervical Lesions With Oral Hygiene Aspects and Oclusal Force

Werneck

Queiroz

Rio

et al. 2022

Preprint

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One of the theories that contribute to explaining the evolution of non-carious cervical lesions (NCCLs) refers to fatigue wear, in which the concentration of stresses in the cervical region leads to the formation of microfractures in the dental tissues and progressive structure loss. However, due to a combination of factors that may cause wear, there is still uncertainty about the role of the occlusal factor as a risk factor that causes NCCLs. Objectives: The purpose of this case-control study was to investigate the association between the presence of NCCLs with occlusal force and other potential risk factors. Materials and Methods: Thirty-nine participants with NCCLs (cases) and 39 non-carrier patients (control), aged between 20 and 59 years old, were enrolled in the dental clinic of the Faculdade Integradas São Pedro (FAESA), located in Vitória, Espírito Santo State, Brazil. Information was collected through anamnesis, clinical examination, and a questionnaire addressing aspects related to tooth brushing, dentifrice, and mouthwash use. In clinical examination, patients were submitted to four measurements of occlusal force in the maxillary first premolars and maxillary first molars, using a strain gauge sensor of medium intensity, the Flexiforce (Tekscan, South Boston, MA, USA). The sensor was calibrated for the unit of measurement in Newtons (N). Results: Data was analyzed using a Student's t-test and multiple logistic regression, adopting the significance level of 5%. There was no statistically significant difference between the case and control groups regarding the bite force in the four measured regions. Logistic regression identified sex as a factor significantly associated with non-carious cervical lesions (p = 0.020). For the calculation of the odds ratio, the female sex presented a six-fold chance (OR = 6.082; CI = 1.332 - 27.765) higher than non-carious cervical lesions. Conclusions: It was concluded that females presented a higher risk factor for non-carious cervical lesions than men, whereas there was no association of occlusal strength, as well as aspects related to brushing and deleterious habits.Clinical Relevance: NCCLs are highly prevalent in daily clinical practices and can impact aesthetics and function, leading to hypersensitivity and impairment of oral-health-related quality of life. Gingival recession is an important clinical indicator for the presence of NCCLs.

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Section: Discussionmentioning

confidence: 99%

Association of Non-carious Cervical Lesions With Oral Hygiene Aspects and Oclusal Force

Werneck

Queiroz

Rio

et al. 2022

Preprint

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“…Moreover, flexural strength is the most commonly measured mechanical property of brittle materials. Consequently, in this study, we focused on the first principal stress and interpreted the fracture mechanism using the flexural strength (Table 1) as a reference value 21) . As shown in Fig.…”

Section: Relationship Between Fracture Load and First Principal Stres...mentioning

confidence: 99%

Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An <i>in vitro</i> experimental and finite element analysis

et al. 2022

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To evaluate the fracture resistance of computer-aided design and computer-assisted manufacturing restorations as the abutment of removable partial dentures, experimental blocks, with the rest seat made of feldspar, hybrid resin composite, lithium disilicate glass ceramic, or zirconia, were subjected to loading by a metallic occlusal rest. The rest contacted the rest seat with an accurate fit and two mismatch contact conditions: bottom and sidewall contact. Zirconia exhibited the highest fracture load, and the fracture load of the accurate fit was significantly higher than that of the sidewall contact (p<0.05) and insignificantly higher than that of the bottom contact (p>0.05). A finite element analysis of the sidewall contact revealed a higher tensile stress concentration at the bottom of the rest seat than the other contact conditions. The mismatch between the rest and the restoration reduced fracture resistance, while zirconia as the abutment withstood the average occlusal force of the posterior region.

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“…However, their flexural properties are mostly reported by manufacturers [6]. To ensure that the dental restorative materials chosen are suitable for the task, it is crucial to take necessary measures and [8,20,21], or compared between different polymeric materials [13,22,23], while advising to perform further studies on the flexural properties and behavior of more materials were advised. To the best of the authors knowledge, there have been no prior investigations that have examined the flexural characteristics of four distinct CAD/CAM material categories (including polymeric, fiberreinforced resin, ceramic, and hybrid materials; those intended for full anatomical restoration and those intended only for framework fabrication.)…”

Section: Introductionmentioning

confidence: 99%

The effect of thermal aging on flexural strength of CAD/CAM hybrid and polymeric materials

Yeslam,

Alharbi,

Albalawi

et al. 2023

Mater. Res. Express

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Intraoral thermal variations may adversely affect the flexural properties of novel biomaterials for intelligent CAD/CAM fabrication of fixed partial dentures (FPDs). This study aimed to evaluate the flexural strength, flexural modulus, and effect of thermal aging on CAD/CAM restorative materials. Five CAD/CAM materials were investigated: nano-ceramic-hybrid (GR), polymer-infiltrated-ceramic-network (VE), polyether-ether-ketone (PK), fiberglass-reinforced epoxy-resin (CT), and Feldspar Ceramic (VB). A total of 100 bar-shaped specimens were prepared (N=20). Each group was subdivided into thermocycled and non-thermocycled subgroups (n=10). All the specimens underwent a 3-point bending test. The mean flexural strengths and moduli were statistically analyzed using paired t-test, analysis of variance (ANOVA), and Bonferroni pair-wise comparison (p<0.05). Significant differences were observed in the flexural strength and modulus between the materials(p<0.001). Non-thermocycled CT had the highest flexural strength (924.88±120.1MPa), followed by GR (385.13±90.73MPa) PK (309.56±46.84MPa). The flexural strength of VB was the lowest (p<0.001), but similar to that of VE. Only VE significantly decreased in flexural strength after thermocycling (p=0.002). It can be concluded that nano-ceramic-hybrid materials had higher flexural strength than feldspar ceramic and other resin/polymeric CAD/CAM materials. The materials were more resistant to thermocycleling. Their flexural strength was comparable to polyether-ether-ketone for CAD/CAM frameworks, which is suitable for higher stress loads.

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Contact fracture test of monolithic hybrid ceramics on different substrates for bruxism

Cited by 8 publications

References 33 publications

Association of Non-carious Cervical Lesions With Oral Hygiene Aspects and Oclusal Force

Association of Non-carious Cervical Lesions With Oral Hygiene Aspects and Oclusal Force

Fracture resistance of CAD/CAM restorative materials in mismatched removable partial denture rests: An <i>in vitro</i> experimental and finite element analysis

The effect of thermal aging on flexural strength of CAD/CAM hybrid and polymeric materials

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