Vertical and Horizontal Misfit Analysis of 3-unit FDP Fabricated with Different Techniques and CAD/CAM Systems

Pellizzer, Eduardo Piza; Mello, Caroline Cantieri de; Gomes, Jéssica Marcela de Luna; Júnior, Joel Ferreira Santiago; Lemos, Caa; Verri, Fellippo Ramos

doi:10.1590/0103-6440201801916

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…The marginal adaptation of PLVs has been extensively studied. A better vertical marginal fit was reported for platinum foil veneers compared to veneers made with the refractory die technique [10], with a mean vertical marginal gap, defined as the vertical distance between the finish line of the prepared tooth and the margins of the fabricated veneers, was estimated 187 µm versus 242 µm, respectively [11] (Figure 1). These observations are in line with those of Sim and Ibbetson [12] (60 versus 290 µm) and Wall et al [13] (74 versus 132 µm).…”

Section: Introductionmentioning

confidence: 80%

Risk Factors with Porcelain Laminate Veneers Experienced during Cementation: A Review

Assaf,

Azer,

Sfeir

et al. 2023

Materials

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The clinical success of porcelain laminate veneers (PLVs) depends on many clinical and technical factors, from planning to execution, among which adhesive cementation is of significant importance. This procedure carries many risk factors if not optimally executed. The objective of this study was to document the clinical parameters affecting successful cementation procedures with a focus on the adhesive strength, integrity, and esthetics of the PLVs. A literature search was conducted through MEDLINE, complemented by a hand search using predefined keywords. Articles published in English between 1995 and 2023 were selected. According to this review, the success and longevity of PLVs rely in great part on the implementation of a precise cementation technique, starting from field isolation, adequate materials selection for adhesion, proper manipulation of the materials, the seating of the veneers, polymerization, and elimination of the excess cement. Several clinical steps performed before cementation, including treatment planning, preparation, impression, and adequate choice of the restorative material, could affect the quality of cementation. Scientific evidence suggests careful implementation of this process to achieve predictable outcomes with PLVs. The short- and long-term clinical success of adhesively luted PLVs is tributary to a deep understanding of the materials used and the implementation of clinical protocols. It is also contingent upon all the previous steps from case selection, treatment planning, and execution until and after the cementation.

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Section: Introductionmentioning

confidence: 80%

Risk Factors with Porcelain Laminate Veneers Experienced during Cementation: A Review

Assaf,

Azer,

Sfeir

et al. 2023

Materials

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“…A three-dimensional optical microscope (Quick Scope, Mitutoyo, United States) was used to calculate the dimensions of the samples. 8 This microscope had a digital table with a magnification of 350x and an accuracy of 1 μm. 8 Measurements were calculated using QSPAK software (Mitutoyo, United States).…”

Section: Methodsmentioning

confidence: 99%

“… 8 This microscope had a digital table with a magnification of 350x and an accuracy of 1 μm. 8 Measurements were calculated using QSPAK software (Mitutoyo, United States). 8 …”

Section: Methodsmentioning

confidence: 99%

Effect of Extrinsic Pigmentation on Dimensional Stability, Hardness, Detail Reproduction, and Color of a Silicone

et al. 2022

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Objective The aim of the study is to evaluate the effect of extrinsic pigmentation on the dimensional stability, hardness, detail reproduction, and color of a silicone after thermocycling. Materials and Methods Sixty samples of MDX4–4210 silicone (Dow Corning Corporation Medical Products) with intrinsic pink pigment (H-109-P, Factor II) and intrinsic opacifier (TiO) were fabricated. Two groups were created: Group 1—only intrinsic pigmentation (H-109P, Factor II + TiO) (Control); and Group 2—intrinsic (H-109P, Factor II + TiO) and extrinsic (Tan FE - 215, Factor II) pigmentation. The following tests were performed for each group: dimensional stability, Shore A hardness, detail reproduction, and color. Readings for the tests were taken before and after thermocycling (2,000 cycles). For dimensional stability and hardness, two-way analysis of variance (ANOVA) was used. One-way ANOVA was used for the color test. In case of significant statistical difference, the Tukey test was applied (p <0.05). All samples achieved the same detail reproduction score, therefore, no statistical evaluation was performed. Results For the dimensional stability test, comparing the initial time with the final time, there was a significant contraction in both groups after thermocycling. For the hardness test, comparing the time points, only group 1 showed a significant reduction in hardness after thermocycling. Groups 1 and 2 scored 2 for the detail reproduction test, before and after thermocycling. Comparing group 1 with group 2, there was no significant difference for color change. Conclusion Based on the tests performed, extrinsic pigmentation did not show a negative effect on silicone, and therefore it can be indicated. The results of the dimensional, hardness, detail reproduction and color evaluations of the MDX4–4210 silicone were clinically acceptable in all cases in the groups with and without extrinsic pigmentation.

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“…Concerning multi-implant systems, misfit conditions can occur because the accuracy of the bar-manufacturing process is not always adequate for determining a perfect passive coupling between the bar and implants. Such misfit conditions can determine heavy stress in bone tissues and may compromise the reliability and durability of the prosthesis and the mandible bone health [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Interaction Phenomena between Dental Implants and Bone Tissue in Case of Misfit: A Pilot Study

et al. 2023

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The biomechanical response of cortical and trabecular bone tissues represents a fundamental aspect for the interpretation of the functional response of dental implants. In the case of misfit, the interaction phenomena occurring within the surgical and the subsequent healing phases must be interpreted primarily in the light of the response of bone tissue. This is influenced by the specific loadings induced, characterized by intensity and variable trends. The pilot study reported, which intentionally refers to a simple case of a two-implants frame, is addressed to define the method to approach the biomechanical investigation of the problem and to attest the necessity to integrate clinical competences with biomechanical analysis for interpreting different aspects of osseointegration. The action induced in cortical and trabecular bone regions depending on the implant frame conformation, the surgical procedure adopted, the varying condition at the bone–implant interface and the evolutionary trend of healing are the principal aspects to be considered to evaluate the osseointegration process. The biomechanical reliability of the specific implant frame is investigated in terms of bone–implant interaction by means of numerical models. This approach can offer valid information and support clinical practice under the fundamental condition that bone biomechanical behavior is properly characterized and represented in the model, in spite of the complex formulation to be adopted.

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Vertical and Horizontal Misfit Analysis of 3-unit FDP Fabricated with Different Techniques and CAD/CAM Systems

Cited by 8 publications

References 22 publications

Risk Factors with Porcelain Laminate Veneers Experienced during Cementation: A Review

Risk Factors with Porcelain Laminate Veneers Experienced during Cementation: A Review

Effect of Extrinsic Pigmentation on Dimensional Stability, Hardness, Detail Reproduction, and Color of a Silicone

Interaction Phenomena between Dental Implants and Bone Tissue in Case of Misfit: A Pilot Study

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