Effects of Different Laser Treatments on Some Properties of the Zirconia-Porcelain Interface

Abdulsatar, Abdulsatar M; Hussein, Basima Mohammed Ali; Mahmood, Ali M

doi:10.34172/jlms.2021.02

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…In this study, the tested zirconia substrates airabraded with 50 µm alumina oxide showed appropriate roughness to advance the bond of the repair material to the veneer ceramic and core zirconia. Surface modification by laser application has been recommended by many authors as an alternative method to change the surface texture of zirconia, enhance surface topography, 33 and surface roughness, 34,35 and activate micromechanical bonding to the resin repair material. 36 Laser effects on zirconia could be inherent in ablation or vaporization, which is reasoned as a microexplosion of portions of material heated higher than the melting point.…”

Section: Discussionmentioning

confidence: 99%

Shear Bond Strength of Two Repair Systems to Zirconia Ceramic by Different Surface Treatments

Abdulla

Hasan

2022

J Lasers Med Sci

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Introduction: Intraoral repair has been suggested as a treatment option to repair the chipping or fracture of veneered zirconia; the success of the procedure is mainly determined by the bonding between zirconia and composite resin. The present study aimed to investigate and compare the shear bond strength (SBS) of two intraoral repair systems to zirconia ceramic treated with a laser or air-abrasion surface modification. Methods: Ninety tube-shaped samples (diameter of 10 mm and height of 4 mm) were divided into three main groups: Group I (zirconia 100%, n=30); Group II (veneer ceramic 100% n=30); Group III (zirconia with a veneer ceramic n=30). Each main group was subdivided into two subgroups (n=15): Subgroup A: samples repaired with Ceramic Repair N; Subgroup B: samples repaired with the Cimara Repair System. The subgroup samples were further subdivided based on the treated surface (n=5 samples): Control (no surface modification), Er,Cr:YSGG laser surface modification, and air-abrasion surface modification. The SBS was employed using a universal testing machine. The mode of failure was observed using a stereomicroscope. Results: Significant differences were observed in the mean SBS values between the different surface modifications (P˂0.05). Tukey’s post hoc test showed that the air-abrasion surface modification of the veneer ceramic repaired with the Ceramic repair N system had the highest mean value (13.74 MPa) among the different groups, while no surface modification of zirconia repaired with the Cimara repair system had the lowest mean value (2.84 MPa). The control group (no surface modification) had the lowest mean value among all the treated groups. Conclusion: The SBS is surface modification-dependent, and higher SBS is obtained by air-abrasion than Er, Cr:YSGG laser surface modifications with the selected parameters. The Ceramic repair N system had significantly higher SBS for all surface-treated substrates than the Cimara repair system.

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Section: Discussionmentioning

confidence: 99%

Shear Bond Strength of Two Repair Systems to Zirconia Ceramic by Different Surface Treatments

Abdulla

Hasan

2022

J Lasers Med Sci

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“…The surface conditioning of tooth structures and dental materials are some of the most prevalent laser applications in dentistry. Ceramic substrates can be conditioned using several technologies, including Er:YAG, Nd:YAG, Er, Cr, YSGG, and CO 2 lasers [11]. The preference for this recently created approach is increasing owing to its safety and efficacy [12,13].…”

Section: Introductionmentioning

confidence: 99%

Role of CO2 Laser on SBS between Dental Porcelain and Composite Resin Repair Process

Hassan

Hussein

Mohammed³

2023

International Journal of Dentistry

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Background. The surface modification of porcelain material can be conducted by mechanical, chemical, or laser means. This study investigated the CO2 laser effect on porcelain to enhance bonding with composite resin. Materials and methods. A total of 33 blocks of feldspathic porcelain were randomly divided into 3 groups of 10. Additionally, three specimens were used in scanning electronic microscopy and energy-dispersive spectroscopy tests. Group I was treated with 9.5% hydrofluoric acid (HF), Group II with a 5 W CO2 laser, and Group III with CO2 followed by etching with 9.5% HF. Then, a Bisco intraoral repair kit was used, followed by the application of repair composite resin (Tetric N Ceram) on the porcelain surface using a Teflon mold and light-curing source. Shear bond strength (SBS) was assessed by using a digital universal testing machine, and failure modes were evaluated. Data were analyzed by analysis of variance (ANOVA) and least significant difference test. Results. A high significant difference in roughness and SBS was found amongst the tested groups P < 0.001 . SBS and roughness for Group III were significant at P < 0.05 , and the lowest value was observed in Group II. The cohesive mode of failure was dominant in Groups I and III, whereas adhesive failure was dominant in Group II. Conclusion. The surface treatment of porcelain with CO2 laser followed by HF application can enhance roughness and SBS, and can be recommended when extra retention during repair indication.

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“…The veneering materials do not have the sufficient mechanical properties compared to the zirconium suprastructure. Thus, a strong connection of both materials is the deciding factor [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…The zirconium-based restorations in dental prosthetics transfer load up to 750 N [ 6 , 10 ]. The prosthetic zirconium dioxide ZrO 2 is made of grains of the order of (0.2–0.3) µm and does not contain the glass phase.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Stress and Displacement Fields in Prosthetic Crowns Made of Zirconium Dioxide Using Numerical Approach of Homogenization Hypothesis

et al. 2022

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The main goal of this paper is to analyze the stress and displacement fields in prosthetic crowns made of zirconium dioxide using the numerical approach of homogenization hypothesis. The simple engineering model is developed and applied in case of vertical forces. The model is a three-dimensional simulation of molars subjected to crushing, mastication, and clenching. Two basic approaches are considered: the single prosthetic crown on a single molar, and the prosthetic bridge on two molars. The distributions of material parameters are determined for the rigid support and the elastic gum structure of the homogenized properties. The crown on a single molar is analyzed in respect of caries, which are represented by weak material parameters. Irrespective of the problem, the maximal stresses are always insignificant compared to the compressive strength for enamel, dentin, periodontium, and zirconium dioxide. In case of caries, the maximal stresses are located at the contact surface caries/crown, whereas the displacement was higher than the same parameter without caries. The stresses inside the prosthetic bridge on two molars were comparable for elastic and rigid support, and located at the same areas. The molar displacement for elastic gum was higher than for the rigid base, and additionally supplemented by the displacement of the supporting structure.

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Effects of Different Laser Treatments on Some Properties of the Zirconia-Porcelain Interface

Cited by 6 publications

References 22 publications

Shear Bond Strength of Two Repair Systems to Zirconia Ceramic by Different Surface Treatments

Shear Bond Strength of Two Repair Systems to Zirconia Ceramic by Different Surface Treatments

Role of CO2 Laser on SBS between Dental Porcelain and Composite Resin Repair Process

Analysis of Stress and Displacement Fields in Prosthetic Crowns Made of Zirconium Dioxide Using Numerical Approach of Homogenization Hypothesis

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