Comparison of mechanical and biological properties of zirconia and titanium alloy orthodontic micro-implants
최해원, 박영석, 정신혜, 정민호, 문원, 이상훈,
소속 상세정보
최해원 ( Choi Hae-Won ) - Sungkyunkwan University School of Medicine Samsung Medical Center Department of Orthodontics
박영석 ( Park Young-Seok ) - Seoul National University School of Dentistry Department of Oral Anatomy
정신혜 ( Chung Shin-Hye ) - Seoul National University School of Dentistry Department of Conservative Dentistry
정민호 ( Jung Min-Ho ) - Seoul National University School of Dentistry Department of Orthodontics
문원 ( Moon Won ) - University of California School of Dentistry Section of Orthodontics
이상훈 ( Rhee Sang-Hoon ) - Seoul National University School of Dentistry Department of Conservative Dentistry
KMID : 0361920170470040229
Abstract
Objective: The aim of this study was to compare the initial stability as insertion and removal torque and the clinical applicability of novel orthodontic zirconia micro-implants made using a powder injection molding (PIM) technique with those parameters in conventional titanium micro-implants.
Methods: Sixty zirconia and 60 titanium micro-implants of similar design (diameter, 1.6 mm; length, 8.0 mm) were inserted perpendicularly in solid polyurethane foam with varying densities of 20 pounds per cubic foot (pcf), 30 pcf, and 40 pcf. Primary stability was measured as maximum insertion torque (MIT) and maximum removal torque (MRT). To investigate clinical applicability, compressive and tensile forces were recorded at 0.01, 0.02, and 0.03 mm displacement of the implants at angles of 0o, 10o, 20o, 30o, and 40o. The biocompatibility of zirconia micro-implants was assessed via an experimental animal study.
Results: There were no statistically significant differences between zirconia micro-implants and titanium alloy implants with regard to MIT, MRT, or the amount of movement in the angulated lateral displacement test. As angulation increased, the mean compressive and tensile forces required to displace both types of micro-implants increased substantially at all distances. The average bone-to-implant contact ratio of prototype zirconia microimplants was 56.88 ± 6.72%.
Conclusions: Zirconia micro-implants showed initial stability and clinical applicability for diverse orthodontic treatments comparable to that of titanium micro-implants under compressive and tensile forces.
키워드
Micro-implant; Zirconia implant; Temporary anchorage devices; Mechanical stability
원문 및 링크아웃 정보
등재저널 정보