Şeffaf Plak Ataşman Yapımında Kullanılan Farklı Kompozit Materyallerinin Uygulama Süresi, Yüzey Pürüzlülüğü ve Bağlanma Dayanıklılığı Bakımından Karşılaştırılması

Abstract

ERBAŞ, S. Comparison of Different Composite Materials Used in Clear Aligner Attachment Production in terms of Application Time, Surface Roughness and Bond Strength. Hacettepe University, Faculty of Dentistry, Department of Orthodontics, Speciality Thesis, Ankara,2023. Aim: The aim of this study is to obtain aligner attachments by Gc Aligner Connect (GC Corp, Tokyo, Japan) composite resin specially produced for attachment producing and 3 composite resins of different viscosities (Gc Ortho Connect (GC Corp, Tokyo, Japan), Z350 XT (3M Unitek, Monrovia, CA, USA), Filtek Z350 XT Universal (3M Unitek, Monrovia, CA, USA)) with a third generation LED light device (VALO Ortho; Ultradent Products, South Jordan, Utah), and then to evaluate these attachments in terms of working times, placement accuracy, surface roughness and bond strength. Material and Method: In the study, 160 upper premolars were divided into 4 different groups with 40 teeth in each group (Group 1: Gc Aligner Connect, Group 2: Gc Ortho Connect, Group 3: 3M Z350 XT flowable and Group 4: Filtek Z350 XT Universal). Groups were divided into 2 subgroups of 20 teeth, A and B. A power of 1000 mW/cm2 was applied to the teeth in group A for 10 seconds with a light device, and 3200 mW/cm2 power was applied to the teeth in group B for 3 seconds. The samples were then compared in terms of attachment bonding times, surface roughness, placement accuracy and bond strength. Results: It was found that the short term and high power irradiated subgroup of the Gc Ortho Connect resin had the shortest total attachment application time (115.15±10.65 seconds). The longest total attachment application time was found for high viscosity Filtek Z350 XT Universal composite resin (282.64±43.27 seconds). When the light device was applied for 10 seconds and 1000 mW/cm2, the mean of “excess” measurement of the placement accuracy of the 3M Z350 XT flowable composite resin was found to be higher than the mean measurements of GC Aligner Connect, GC Ortho Connect and Universal composite resins (3-1, p<0.001) (3-2, p=0.002) (3-4, p=0.005). In the case where the light device was applied for 3 seconds, the "excess" measurement average of the placement accuracy of 3M Z350 XT flowable and Universal composite resins was found to be higher than the measurement averages of GC Aligner Connect composite resin (1-3, p=0.001) (1-4, p<0.001). No statistically significant results were obtained between the “deficiency” measurement averages in all composite resin groups. According to the surface roughness measurements of the attachment in the condition where light was applied for 10 seconds, the Ra, Rz and R-Max. measurement averages of the GC Aligner Connect, GC Ortho Connect and 3M Z350 XT flowable composite resins were found to be higher than the Ra, Rz and R-Max. measurement averages of the Universal composite resin. (p<0.005). According to the results of 3 seconds of light application, the Ra and Rz measurement averages of the GC Aligner Connect composite resin were found to be higher than the Ra and Rz measurement averages of the 3M Z350 XT flowable composite resin (1-3, p=0.010) (1-3, p=0.032). No statistically significant difference was found between the bond strengths of the attachments to the teeth in the subgroups where the light device was applied for 10 seconds and 1000 mW/cm2 power. In the subgroups where 3 seconds and 3200 mW/cm2 power was applied, the mean bond strength of Universal composite resin (19.27±6.37 MPa) was higher than the mean of GC Aligner Connect (11.42±2.54 MPa) and GC Ortho Connect (14.43±4.61MPa) composite resins (4-1, p<0.001) (4-2, p=0.015). Comparison of composite resin groups within themselves in terms of bond strength according to the light factor, the mean bond strength measurement of Universal composite resin for 3 seconds light factor (19.27±6.37 MPa) was higher than the measurement for 10 seconds light factor (15.75±3.90 MPa) (B-A, p=0.041). For the 10 second light factor, no statistically significant relationship was obtained between ARI scores and composite resin groups (p=0.124). It was determined that composite resins were mostly GC Aligner Connect and GC Ortho Connect when the ARI score was 0 for the 3 second light factor, and the composite resins were mostly 3M Z350 XT flowable and Universal when the ARI score was 2. Conclusion: Composite resins with different viscosities could be preferred for clear aligner attachment production. Composite resin selection may vary according to the clinician's expectations. It seems possible to produce attachments with low and high viscosity composite resins.