Effect of tooth‐related factors on the shear bond strengths obtained with CO₂ laser conditioning of enamel

Abstract

Carbon dioxide (CO 2 ) lasers are capable of producing surface irregularities in human enamel which resemble those resulting from etching of enamel with orthophosphoric acid. This report presents the results of a laboratory study which examined the effect of selected tooth-related variables on shear bond strength between a current generation bonding agent (Scotchbond MultiPurpose) and acid-etched or laser-conditioned human enamel. There were no significant differences in shear bond strength between human maxillary central incisor teeth, first premolars, and third molars in either the acid etch or laser-conditioned groups. Polishing of enamel to give a flat surface increased the shear bond strength obtained with acid etching, but did not alter significantly bond strengths achieved with laser conditioning. There was a tendency for a higher bond strength with acid etching, but not with laser conditioning, in porcine molar enamel compared with human molar and bovine incisor enamel. In terms of the mode of operation of the laser, the repetitively pulsed mode resulted in a two-fold improvement in shear bond strength compared with the single pulse mode. These results indicate that shear bond strengths in the order of 10 MPa can be obtained reliably on human teeth using laser conditioning with pulsed modes in the absence of any other preparation of the natural enamel surface.

Bovine teeth as substitute for human teeth in dental research: a review of literature

“…Therefore, 68 papers were included in the final review. The studies covered seven main categories: morphology (5 studies) (22)(23)(24)(25)(26), chemical composition (11 studies) (27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37), physical properties (12 studies) (38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49), dental caries (7 studies) (6,9,(50)(51)(52)(53)(54), dental erosion/abrasion (10 studies) (55)(56)(57)(58)(59)(60)(61)(62)(63)(64), bonding/adhesive strength (17 studies) (65)(66)(67)(68)…”

“…Bonding/adhesive strength studies Table 3 depicts the 17 in vitro studies reviewed in this category (65)(66)(67)(68)(69)(70)(71)(72)(73)(74)(75)(76)(77)(78)(79)(80)(81). Three studies tested only human and bovine enamel (65)(66)(67).…”

“…Three studies tested only human and bovine enamel (65)(66)(67). Eight studies compared both enamel and dentin of human and bovine teeth (68)(69)(70)(71)(72)(73)(74)(75).…”

Comparative Evaluation of Shear Bond Strength of Orthodontic Brackets using Laser Etching and Two Conventional Etching Techniques: An in vitro Study

“…Although some researchers 15,16 agree that laser etching is not suitable for etching enamel, others [17][18][19] reported that laser irradiation can be used to etch tooth enamel. In our opinion, the contrary findings were due to the different outputs and experimental designs of the studies.…”

Mi̇neye Farkli Yüzey Pürüzlendi̇rme Metotlariyla Yapiştirilmiş Braketleri̇n Makaslama Ağlanma Dayanimlari

“…[10][11][12][13][14][15][16] Bazı çalıĢmalarda kumlama ve lazer uygulamalarının asit uygulanmasına alternatif olacağı görüĢü var iken, baĢka çalıĢmalarda bu görüĢün tersi iddialar ortaya atılmıĢtır. [17][18][19][20][21][22][23][24][25][26][27] Sonuç olarak, bugüne kadar yapılan farklı çalıĢmalardan ortaya çıkan ortak bir görüĢ mevcut değildir. Bu nedenle, bu çalıĢma dört farklı pürüzlendirme yönteminin ortodontik braketlerin mineye makaslama bağlanma dayanımı üzerine etkisini incelemeyi amaçlamaktadır.…”