Static and Fatigue Mechanical Performance of Abutments Materials for Dental Restorations

Bruno, Luigi; Canullo, Luigi; Mayer, Yaniv; Schoenbaum, Todd R.; Giuzio, Francesco; Maletta, Carmine

doi:10.3390/ma16103713

Cited by 3 publications

(3 citation statements)

References 21 publications

(30 reference statements)

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“…The confidence interval used for testing the hypothesis was 95%. A similar approach in evaluating small samples has been used by many authors in recent publications when testing and analyzing mechanical performance (tensile tests, bending, impact, hardness, coefficient of friction) of materials for dental restoration [24], resin-modified glass ionomer [25], metal-ceramic compatibility in dental restorations [26], materials containing nanohybrid filler [27] and hypoallergenic denture base resins [28].…”

Section: Resultsmentioning

confidence: 99%

Influence of the Fiber Post Length on the Fracture Strength of Endodontically Treated Teeth

Marinescu,

Abuabboud,

Zimbru

et al. 2023

Medicina

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Background and Objectives: Although fiber posts are widely used in the restoration of endodontically treated teeth (ETT), their ideal cementation depth into the root canal is still debated in literature. The aim of the present study was to evaluate whether the different intra-radicular insertion lengths of the fiber posts influence the fracture strength of ETT. Materials and Methods: A total of 10 permanent human lower incisors with straight roots of similar length and volume extracted for periodontal reason were sectioned 2 mm above the cement–enamel junction (CEJ) to a total length of 18 mm and endodontically treated in the same manner, then randomly divided into two groups of five each (Groups 1 and 2, n = 5). Two sound incisors, with no endodontic treatment, were used as the control group (Group 3, n = 2). After one week of storage in a humid environment, spaces for fiber post no. 1 (Reforpost, Angelus, Londrina, PR, Brazil) were prepared in the first two groups at a depth of 5 mm (Group 1) and 7 mm (Group 2), and the fiber posts were adhesively cemented using self-adhesive resin cement (Maxcem Elite, Kerr GmbH, Herzogenrath, Germany). After 7 days, the samples were vertically positioned and fixed in a self-curing transparent acrylic resin, up to 2 mm below the CEJ level, and mechanically tested in compression after another week of storage using a displacement-controlled testing machine up to each sample’s fracture. The force–displacement curves were recorded for each sample, the means were calculated for each group and a statistical comparative analysis between groups was conducted. Results: Although no statistically significant differences between groups were observed, the highest mean fracture force (N) was recorded in Group 2 (1099.41 ± 481.89) in comparison to Group 1 (985.09 ± 330.28), even when compared to the sound, non-treated teeth (1045.69 ± 146.19). Conclusions: Within the limitations of this in vitro study, teeth where fiber posts were placed deeper into the root canal (7 mm) recorded slightly higher fracture forces in comparison with shorter lengths (5 mm). However, similar biomechanical performances obtained in the mechanical tests showed no statistical differences between the 7 mm and the 5 mm inserted posts.

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Section: Resultsmentioning

confidence: 99%

Influence of the Fiber Post Length on the Fracture Strength of Endodontically Treated Teeth

Marinescu,

Abuabboud,

Zimbru

et al. 2023

Medicina

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“…In dental implantology, PEEK may be utilized to produce both dental implants and implant abutments [93][94][95]. Fiber-reinforced PEEK composites used for dental implants and abutments even show stress distribution to the bone tissues [96]. Implant abutments made of PEEK show less accumulation of bacterial plaque on the surface compared to Titanium ones [97,98].…”

Section: Peekmentioning

confidence: 99%

Comparative Analysis of the Mechanical Properties and Biocompatibility between CAD/CAM and Conventional Polymers Applied in Prosthetic Dentistry

Chuchulska,

Dimitrova,

Vlahova

et al. 2024

Polymers

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Modern media often portray CAD/CAM technology as widely utilized in the fabrication of dental prosthetics. This study presents a comparative analysis of the mechanical properties and biocompatibility of CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) polymers and conventional polymers commonly utilized in prosthetic dentistry. With the increasing adoption of CAD/CAM technology in dental laboratories and practices, understanding the differences in material properties is crucial for informed decision-making in prosthodontic treatment planning. Through a narrative review of the literature and empirical data, this study evaluates the mechanical strength, durability, esthetics, and biocompatibility of CAD/CAM polymers in comparison to traditional polymers. Furthermore, it examines the implications of these findings on the clinical outcomes and long-term success of prosthetic restorations. The results provide valuable insights into the advantages and limitations of CAD/CAM polymers, informing clinicians and researchers about their suitability for various dental prosthetic applications. This study underscores the considerable advantages of CAD/CAM polymers over conventional ones in terms of mechanical properties, biocompatibility, and esthetics for prosthetic dentistry. CAD/CAM technology offers improved mechanical strength and durability, potentially enhancing the long-term performance of dental prosthetics, while the biocompatibility of these polymers makes them suitable for a broad patient demographic, reducing the risk of adverse reactions. The practical implications of these findings for dental technicians and dentists are significant, as understanding these material differences enables tailored treatment planning to meet individual patient needs and preferences. Integration of CAD/CAM technology into dental practices can lead to more predictable outcomes and heightened patient satisfaction with prosthetic restorations.

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“…Sahebi et al 15 evaluated the fracture resistance of monolithic zirconia, porcelain-veneered zirconia, and a control group of porcelain-fused-to-metal under thermocycling and concluded that monolithic zirconia presented higher fracture resistance than the bilayered restorations for screw-cement retained implantsupported restorations. However, few studies [16][17][18][19] have evaluated fatigue and fracture resistance of translucent monolithic zirconia crowns and the use of CoCr base abutments under chewing simulating.…”

Section: Introductionmentioning

confidence: 99%

Influence of ceramic crown design (translucent monolithic zirconia vs. bilayered) of implant‐supported single crowns after mechanical cycling

de Oliveira Limirio,

Gomes,

Santiago‐Junior

et al. 2024

J Esthet Restor Dent

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ObjectivesThis study aimed to assess the influence of translucent monolithic versus bilayered crowns and whether the use of a CoCr base abutments affects the fatigue and fracture resistance of screwed implant‐supported single crowns with external connections under mechanical cycling.Materials and MethodsFifty specimens were divided into groups: (1) metal–ceramic (MC) crown, (2) veneered zirconia crown (Zr), (3) veneered zirconia crown with a CoCr base abutment (ZrB), (4) monolithic translucent zirconia crown (MZr), and (5) monolithic translucent zirconia crown with a CoCr base abutment (MZrB). Specimens underwent mechanical cycling (5 × 106 cycles; 150 N) evaluating fatigue resistance (number of failures) and those that failed were subsequently subjected to fractographic analyses (stereomicroscope and scanning electron microscope) to evaluate failure location and area, and maximum fracture load was also measured.ResultsThe failure‐related survival rate (100%) and maximum fracture resistance of the MZrB were significantly higher than those of MC and Zr (50%; p < 0.05). There were no significant differences in the failure rate and fracture resistance when a CoCr base abutment was used or not in the translucent monolithic Zr groups (p > 0.05;MZrB vs. MZr). Failure location, with MC crowns' fractures, noted at the screw area (p = 0.043), while all‐ceramic crowns were mostly in the cuspid and to failure area, the Zr group had the largest mean (15.55 ± 9.17 mm2) among the groups, significant difference only when compared with MC (1.62 ± 0.81 mm2) (p = 0.025).ConclusionsTranslucent monolithic zirconia crowns exhibited significantly higher fatigue and fracture resistance compared with conventional MC and bilayered crowns.Clinical SignificanceThe appropriate choice of material and manufacturing technique is crucial for predicting the higher clinical performance of single crowns. Enhanced mechanical resistance in terms of fatigue and fracture resistance can be achieved by replacing MC and bilayered restorations with computer‐aided design and computer‐aided manufacturing monolithic zirconia.

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Static and Fatigue Mechanical Performance of Abutments Materials for Dental Restorations

Cited by 3 publications

References 21 publications

Influence of the Fiber Post Length on the Fracture Strength of Endodontically Treated Teeth

Influence of the Fiber Post Length on the Fracture Strength of Endodontically Treated Teeth

Comparative Analysis of the Mechanical Properties and Biocompatibility between CAD/CAM and Conventional Polymers Applied in Prosthetic Dentistry

Influence of ceramic crown design (translucent monolithic zirconia vs. bilayered) of implant‐supported single crowns after mechanical cycling

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