In Vitro Assessment of Single-Retainer Tooth-Colored Adhesively Fixed Partial Dentures for Posterior Teeth

Bortolotto, Tissiana; Monaco, Carlo; Onisor, Ioana Maria; Krejci, Ivo

doi:10.1155/2010/101095

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…In another study, 47 the fracture strength of three different designs of cantilever RBFDPs for the replacement of a missing premolar was evaluated. The restorations were fabricated from composite resin, feldspathic porcelain, and FRC resin.…”

Section: Discussionmentioning

confidence: 99%

Effect of different designs of minimally invasive cantilever resin‐bonded fixed dental prostheses replacing mandibular premolar: Long‐term fracture load and 3D finite element analysis

Kasem

Elsherbiny

Abo-Madina

et al. 2022

Journal of Prosthodontics

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To evaluate the fracture load and stress magnitude of different retainer designs of minimally invasive cantilever resin-bonded fixed dental prostheses (RBFDPs) after artificial aging. Materials and methods: Fifty caries-free human mandibular molars were prepared as abutments for cantilever fixed dental prostheses using different retainer designs: one wing (OW), two wings (TW), inlay ring (IR), lingual coverage (LC), and occlusal coverage (OC). Computer-aided design and computer-aided manufacturing were used for milling the RBFDPs using fiber-reinforced composite (FRC), and the restorations were adhesively bonded. The specimens were then subjected to thermomechanical aging and loaded until failure. The 3D finite element analysis (FEA) was performed with five models of retainer designs similar to the in vitro test. Modified von Mises stress values on enamel, dentine, luting resin, and restorations were examined. Data were analyzed with Kruskal-Wallis and Mann-Whitney U tests (p < 0.001). Results: A statistically significant difference (p < 0.001) was found between all groups except between IR and LC and between OW and TW designs, with the highest mean failure load detected for OC (534.70 N) and the lowest detected for OW (129.80 N). With regard to failure mode, OW, TW, and LC showed more incidences of favorable failure patterns than IR and OC designs. FEA showed that FRC transmitted low stresses in tooth structure and high stresses to the luting resin. Conclusions: LC and OC designs can be used to design cantilever RBFDPs in premolar area. IR design transmitted more stresses to the tooth structure and resulted in 30% catastrophic failure. OW and TW were below the normal occlusal force and should be carefully used.

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Section: Discussionmentioning

confidence: 99%

Effect of different designs of minimally invasive cantilever resin‐bonded fixed dental prostheses replacing mandibular premolar: Long‐term fracture load and 3D finite element analysis

Kasem

Elsherbiny

Abo-Madina

et al. 2022

Journal of Prosthodontics

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“…For the evaluation of marginal adaptation, replicas before and after aging were poured out with an epoxy resin (EpoFix, Struers, Willich, Germany), gold sputtered, and subjected to a quantitative marginal analysis in a scanning electron microscope under × 200 magnification (Zeiss Gemini, Sigma 300 VP, Karl Zeiss Microscopy, Cambridge, UK) and a custom-made module programmed within an image processing software (Scion Image, Scion Corp, Frederik, MA, USA) (7,8,24).…”

Section: Methodsmentioning

confidence: 99%

Effect of 9.3 μm CO2 and 2.94 μm Er:YAG Laser vs. Bur Preparations on Marginal Adaptation in Enamel and Dentin of Mixed Class V Cavities Restored With Different Restorative Systems

Otero¹,

Bella²,

Krejci³

et al. 2021

Front. Dent. Med

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This study aimed to compare marginal adaptation in enamel and dentin before and after aging of laser vs. bur-prepared mixed class V cavities restored by different restorative systems. Seventy two caries-free human molars were distributed to nine experimental groups; cavities were prepared using two different lasers: a handpiece -integrated 2.94 μm Er:YAG laser at 4.5 W, 300 mJ, and 0.75 W, 50 mJ with 15 Hz (LiteTouch, Light Instruments, Israel) and a novel CO2 laser at 12.95 W, 19.3 mJ, and 4.1 W, 6.11 mJ with 671 Hz (Solea 9.3 μm, Convergent Dental, USA). Cavities prepared with conventional diamond burs (Intensiv, Switzerland) in a red contra angle at high speed under maximal water cooling served as control. Cavities were prepared under simulation of dentinal fluid and restored using three different self-etching universal adhesives in combination with three nanohybrid composites, applied in two layers: Scotchbond Universal with Filtek Supreme XTE (3M, USA), G-Premio BOND with Essentia Universal (GC, Japan), and OptiBond Universal with Harmonize Universal (Kerr, USA). After restorations' polishing and simultaneous thermal (5–50°C, 2 min each) and mechanical loading (max. 49 N; 200,000 cycles), replicas of restoration margins were examined under SEM at × 200 magnification. Percentages of continuous margins (CMs) were quantified before and after the fatigue test and statistically compared (two-way ANOVA with Fisher's least significant difference [LSD] post hoc test). Significant differences were found in almost all groups between the results before and after the fatigue test, as well as between the different preparation tools and restorative materials (p < 0.05). Traditional bur preparations are confirmed as gold standard in enamel and dentin, as all three tested restorative systems provide results of marginal adaptation of more than 80% CM after loading. Er:YAG laser preparations can be equally effective in combination with SBU/Filtek Supreme XTE. CO2 laser ablation could not provide convincing results with the tested self-etching restorative systems. Marginal adaptation has been highly dependent on the substrate and showed impaired adhesion, especially in enamel. Scotchbond Universal/Filtek Supreme XTE showed the highest and most stable values of CM. The other two restorative systems were highly dependent on the preparation device of the substrate.

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Shape optimization of a 2-unit cantilevered posterior resin-bonded fixed dental prosthesis

Chen

Fok

2023

The Journal of Prosthetic Dentistry

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In Vitro Assessment of Single-Retainer Tooth-Colored Adhesively Fixed Partial Dentures for Posterior Teeth

Cited by 3 publications

References 18 publications

Effect of different designs of minimally invasive cantilever resin‐bonded fixed dental prostheses replacing mandibular premolar: Long‐term fracture load and 3D finite element analysis

Effect of different designs of minimally invasive cantilever resin‐bonded fixed dental prostheses replacing mandibular premolar: Long‐term fracture load and 3D finite element analysis

Effect of 9.3 μm CO2 and 2.94 μm Er:YAG Laser vs. Bur Preparations on Marginal Adaptation in Enamel and Dentin of Mixed Class V Cavities Restored With Different Restorative Systems

Shape optimization of a 2-unit cantilevered posterior resin-bonded fixed dental prosthesis

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