접착방법 및 multistranded wire의 종류에 따른 접착식 보정장치의 전단접착강도에 관한 연구
A study of shear bond strength of bonded retainer according 새솓 bonding method and type of wires
이형철, 손홍주,
소속 상세정보
이형철 ( ) - 부산대학교 치과대학 교정학교실
손홍주 ( ) - 부산대학교 치과대학 교정학교실
KMID : 0361920020320020143
Abstract
The bonded orthodontic retainer constructed from composite and multistrand orthodontic wire provides an esthetic and efficient system for maintained retention. This study was designed to measure shear bond strength of bonded retainers and to suggest a optimal combination of a multistrand wire and bonding method used when bonded retainer was fabricated. 160 sound maxillary and mandibular premolars were used for 80 test samples. After Uniformizing bonding area, length of wire, and thickness of composite, multistrand wire was bonded to fabricated a bonded retainer by direct or indirect bonding method. Shear bond strength and extension length of each ample were measured by a universal testing machine.
The results of this study were as follows
1. In vitro shear bond testing found 6-stranded, 0.0155 inch wires to have the largest shear bond strength and 3-stranded, 0.0195 inch wires to have the least shear bond strength. But, These difference was not statistically significant(p<0.05).
2. In vitro extension testing found 3-stranded, 0.0155 inch wires to have the largest extension length and 3-stranded, 0.0195 inch wires to have the least extension length(p<0_05). The larger diameter wire was used, the larger extension length was shown. But, the strand of wire is not related to the extension length of wire.
3. In comparison with direct bonding method, larger shear bond strength and extension length was shown in indirect bonding method(p<0.05).
키워드
접착식 보정장치;강선의 종류;접착방법;접착강도;Bonded retainer;Type of wires;Bonding method;Bond strength
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