Machining of Biocompatible Ceramics with Femtosecond Laser Pulses

Fiedler, S.; Irsig, Robert; Tiggesbäumker, J.; Schuster, C.; Merschjann, Christoph; Rothe, N.; Lochbrunner, Stefan; Vehse, Martin; Seitz, Hermann; Klinkenberg, E.-D.; Meiwes‐Broer, Karl‐Heinz

doi:10.1515/bmt-2013-4093

Cited by 19 publications

(16 citation statements)

References 6 publications

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“…The present study demonstrated that femtosecond laser irradiation is an effective surface conditioning method for achieving good bond strength for brackets bonded to zirconia. This laser etches the surface gently but with precision, without producing mechanical degradation of the materials [ 25 ] and without raising the temperature of the irradiated surface [ 16 ], unlike other laser devices [ 26 , 27 ]. Furthermore, the present study found adhesive failure type 3 in most of the laser-treated samples, this conditioning technique being more conservative as the zirconia surface remains intact at debonding [ 28 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of femtosecond laser and other surface treatments on the bond strength of metallic and ceramic orthodontic brackets to zirconia

et al. 2017

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Femtosecond laser has been proposed as a method for conditioning zirconia surfaces to boost bond strength. However, metallic or ceramic bracket bonding to femtosecond laser-treated zirconia surfaces has not been tested. This study compared the effects of four conditioning techniques, including femtosecond laser irradiation, on shear bond strength (SBS) of metallic and ceramic brackets to zirconia.Three hundred zirconia plates were divided into five groups: 1) control (C); 2) sandblasting (APA); 3) silica coating and silane (SC); 4) femtosecond laser (FS); 5) sandblasting followed by femtosecond laser (APA+SC). A thermal imaging camera measured temperature changes in the zirconia during irradiation. Each group was divided into 2 subgroups (metallic vs ceramic brackets). SBS was evaluated using a universal testing machine. The adhesive remnant index (ARI) was registered and surfaces were observed under SEM. Surface treatment and bracket type significantly affected the bracket-zirconia bond strength. SBS was significantly higher (p<0.001) for ceramic brackets in all groups (APA+FS > APA > FS > SC > control) than metallic brackets (APA+FS > FS > SC > APA > control). For metallic brackets, groups SC (5.99 ± 1.86 MPa), FS (6.72 ± 2.30 MPa) and APA+FS (7.22 ± 2.73 MPa) reported significantly higher bond strengths than other groups (p < 0.05). For ceramic brackets, the highest bond strength values were obtained in groups APA (25.01 ± 4.45 MPa), FS (23.18 ± 6.51 MPa) and APA+FS (29.22 ± 8.20 MPa).Femtosecond laser enhances bond strength of ceramic and metallic brackets to zirconia. Ceramic brackets provide significantly stronger adhesion than metallic brackets regardless of the surface treatment method.

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Section: Discussionmentioning

confidence: 99%

Effects of femtosecond laser and other surface treatments on the bond strength of metallic and ceramic orthodontic brackets to zirconia

et al. 2017

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“…Although ceramic surface treatments using conventional methods can produce undesired results, such as crack propagation and surface heating, recent studies have shown that FS laser pulses promise a gentler, more precise, and clear surface machining without heating effect. 35,36 This technique is also able to ablate material in thin layers at the surface without changing the properties of the material. 37 The depth and shape of the surface can be readily formed using appropriate software.…”

Section: Discussionmentioning

confidence: 99%

Effect of Femtosecond Laser Treatment on the Shear Bond Strength of a Metal Bracket to Prepared Porcelain Surface

Akpinar

Irgın

Yavuz

et al. 2015

Photomedicine and Laser Surgery

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“…Short pulse lasers such as Nd:YAG, Er:YAG, and Er,Cr:YSGG have also been tested [ 22 – 24 ]. More recently, Ti:Sapphire laser, which provides ultra-short pulses in the femtosecond range, has been introduced, and is considered an optimal alternative as it does not produce any thermal or mechanical damage to the ceramic surfaces [ 25 – 28 ]. However, there is some controversy about the effects of these lasers on the bond strength between ceramic materials and resin cements and composites, with different studies reporting widely differing results [ 29 – 32 ].…”

Section: Introductionmentioning

confidence: 99%

The effects of lasers on bond strength to ceramic materials: A systematic review and meta-analysis

et al. 2018

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Lasers have recently been introduced as an alternative means of conditioning dental ceramic surfaces in order to enhance their adhesive strength to cements and other materials. The present systematic review and meta-analysis aimed to review and quantitatively analyze the available literature in order to determine which bond protocols and laser types are the most effective.A search was conducted in the Pubmed, Embase and Scopus databases for papers published up to April 2017. PRISMA guidelines for systematic review and meta-analysis were followed.Fifty-two papers were eligible for inclusion in the review. Twenty-five studies were synthesized quantitatively. Lasers were found to increase bond strength of ceramic surfaces to resin cements and composites when compared with control specimens (p-value < 0.01), whereas no significant differences were found in comparison with air-particle abraded surfaces.High variability can be observed in adhesion values between different analyses, pointing to a need to standardize study protocols and to determine the optimal parameters for each laser type.

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Machining of Biocompatible Ceramics with Femtosecond Laser Pulses

Cited by 19 publications

References 6 publications

Effects of femtosecond laser and other surface treatments on the bond strength of metallic and ceramic orthodontic brackets to zirconia

Effects of femtosecond laser and other surface treatments on the bond strength of metallic and ceramic orthodontic brackets to zirconia

Effect of Femtosecond Laser Treatment on the Shear Bond Strength of a Metal Bracket to Prepared Porcelain Surface

The effects of lasers on bond strength to ceramic materials: A systematic review and meta-analysis

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