Barathi Divya, Jampanapalli Sharada Reddy, Patloth Tarasingh, Konda Suhasini, Inguva Hemachandrika, Shaik Hasanuddin
Department of Pediatric and Preventive Dentistry, Government Dental College and Hospital, Hyderabad, Telangana, India.
Int J Clin Pediatr Dent. 2024 Jun;17(6):695-701. doi: 10.5005/jp-journals-10005-2904.
Space maintainers (SMs) are used to preserve the space created by premature loss of primary teeth. The most commonly used is the band and loop (B&L) SM. As this SM has several drawbacks, such as poor esthetics and gingival health, laboratory procedures for fabrication, and multiple seating procedures, various bonded SMs were introduced. This study aims to compare the shear bond strength of bonded SMs using ormocer, nanofilled, and short glass fiber-reinforced adhesive composites with the conventional B&L SM luted with type I glass ionomer cement (GIC).
Sixty intact extracted primary molars were randomly divided into four groups ( = 15). In group I (control), conventional B&L SMs were luted with type I GIC, whereas ormocer, nanofilled, and glass fiber-reinforced composites (GFRC) were used to bond the SMs in groups II, III, and IV, respectively. Shear bond strength of all the specimens was analyzed using a universal testing machine, and the obtained data were subjected to statistical analysis.
The highest shear bond strength, that is, 68.82 ± 16.81 MPa, was exhibited by GFRC, followed by 51.04 ± 23.28 MPa with nanofilled composite, 45.3 ± 18.27 MPa with ormocer, and the least in the control group, that is, 42.17 ± 17 MPa.
Glass fiber-reinforced resin composite has better resistance against shear force than the other three study materials, and this was significantly higher ( = 0.001) than conventional B&L SMs.
Barathi D, Jampanapalli SR, Patloth T, Comparative Evaluation of Shear Bond Strength of Bonded Space Maintainers Using Ormocers, Nanofilled and Glass Fiber-reinforced Adhesive Composites. Int J Clin Pediatr Dent 2024;17(6):695-701.
间隙保持器（SMs）用于维持乳牙早失所造成的间隙。最常用的是带环丝圈式（B&L）间隙保持器。由于这种间隙保持器存在一些缺点，如美观性差、牙龈健康问题、制作的实验室流程以及多次就位操作，因此引入了各种粘结式间隙保持器。本研究旨在比较使用有机陶瓷、纳米填料和短玻璃纤维增强粘结性复合材料的粘结式间隙保持器与用I型玻璃离子水门汀（GIC）粘结的传统B&L间隙保持器的剪切粘结强度。
60颗完整拔除的乳牙随机分为四组（每组n = 15）。在I组（对照组）中，传统B&L间隙保持器用I型GIC粘结，而在II组、III组和IV组中，分别使用有机陶瓷、纳米填料和玻璃纤维增强复合材料（GFRC）粘结间隙保持器。使用万能试验机分析所有标本的剪切粘结强度，并对获得的数据进行统计分析。
GFRC表现出最高的剪切粘结强度，即68.82±16.81MPa，其次是纳米填料复合材料为51.04±23.28MPa，有机陶瓷为45.3±18.27MPa，对照组最低，为42.
