Repair bond strength and surface topography of resin‐ceramic and ceramic restorative blocks treated by laser and conventional surface treatments

Abstract

This study intended to compare the repair bond strength of computer-aided design/ computer-aided manufacturing (CAD/CAM) blocks consisting of resin and feldspathic ceramics following different surface treatments using the microtensile bond strength (μTBS) test. Ten specimens were prepared with 4 mm height for Vita Enamic (VE), Lava Ultimate (LU), Vita Mark II (VM), and thermocycled (10,000 cycle, 5-55 C). Each material was categorized into one of five subgroups according to following surface treatments: (a) bur grinding (BG), (b) hydrofluoric acid etching (HF), (c) neodymiumdoped yttrium aluminum garnet (Nd:YAG or NY), (d) erbium-doped yttrium aluminum garnet (Er:YAG or EY), and (e) erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er,Cr:YSGG or ECY) laser conditioning. After surface treatment procedures, specimens were properly restored to 4 mm high with a micro-hybrid composite resin. Bar specimens (1 × 1 × 8 mm) were obtained using a low-speed cutting machine and then thermocycled (10,000 cycle, 5-55 C). The μTBS was tested at 1 mm/min crosshead speed, and failure modes were evaluated. Data were analyzed with two-way ANOVA and post hoc Tukey tests. LU-BG showed significantly higher μTBS (32.94 ± 5.80 MPa) compared to LU-laser groups (p < .05). VE-BG showed significantly higher μTBS (22.06 ± 4.26 MPa) compared to other VE groups (p < .05). Among the laser groups, the NY laser produced the lowest (p < .05) μTBS for LU (13.42 ± 3.44 MPa) and VE (2.27 ± 0.85 MPa), while EY showed the highest (p < .05).Laser-treated VM groups were all prefailured. VM-HF produced a higher μTBS (18.73 ± 3.75 MPa) than VM-BG (5.05 ± 1.76 MPa) (p < .05).

The Effect of Laser Irradiation to Surfaces of Computer-Aided Design/Computer-Aided Fabrication Resin Blocks Coated with a Silane Coupling Agent on Bond Strength between the Resin Blocks and Composite Resin

“…Although the former is used in the laboratory and yields excellent outcomes in improving bond strength, the treatment at some restoration sites may be difficult in a clinical setting, because the powder used in the former may be scattered in the oral cavity, causing patient discomfort. Furthermore, adhesive treatment with hydrofluoric acid is contraindicated in the oral cavity [9].…”

The Effect of Different Surface Treatments on the Repair of 3D Permanent Resin Restorations by Composite Resin Different surface treatments and repair of 3D permanent resin

“…Various surface preparations are made to better bond the repair with composite resin to the restoration. These include bur grinding, hydro uoric acid etching (HF) or phosphoric acid etching, laser conditioning (neodymiumdoped yttrium aluminum garnet (Nd:YAG), erbium-doped yttrium aluminum garnet (Er:YAG) or erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er,Cr:YSGG), sandblasting (with 50 µm aluminum oxide (Al2O3) or silica-coated Al2O3), silane coupling agents and porcelain repair kit application, or the combined use of more than one of these techniques [11][12][13][14].…”

Effect of Different Surface Treatments on Tensile Bond Strength to Repair of 3D Permanent Resin with Composite: In Vitro Study

“…Bunlar arasında frezle aşındırma, hidroflorik asit (HF) veya fosforik asitle yüzeyin muamele edilmesi, lazer, kumlama, silan uygulanması ve porselen tamir kitleri veya bu tekniklerin birlikte kullanımı yer alır. [8][9][10][11][12] Restoratif diş hekimliğinde reçine esaslı materyaller sıklıkla kullanılmaktadır ve tamirleri literatürde çok kez çalışılmıştır. [9][10][11] Ancak 3D yazıcılarla üretilen ve seramik ilave reçinelerle üretilen daimi restorasyonlar diş hekimliği klinik pratiğinde son yıllarda daha rutin kullanılmaya başlanmıştır.…”

“…[8][9][10][11][12] Restoratif diş hekimliğinde reçine esaslı materyaller sıklıkla kullanılmaktadır ve tamirleri literatürde çok kez çalışılmıştır. [9][10][11] Ancak 3D yazıcılarla üretilen ve seramik ilave reçinelerle üretilen daimi restorasyonlar diş hekimliği klinik pratiğinde son yıllarda daha rutin kullanılmaya başlanmıştır. Seramik içeren 3D baskı reçineleriyle daimi restorasyonların tamir edilebilirliği henüz araştırılmamıştır.…”