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KMID : 1034220190110010022
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Journal fo Korean Academy of Osseointegration
2019 Volume.11 No. 1 p.22 ~ p.33
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Registration ability against sinking of implant of wing type implant on the maxilla with limited volume of remaining bone
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Kim Jin-Soo
Hong Nam-Hee
Lee Young-Man
Gong Yoon-Soo
Choi Dong-Ju
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Abstract
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During surgery on maxilla with enlarged maxillary sinus, it is very complex and has many complications such as maxillary sinusitis, bleeding, implant entrapment into sinus, etc. In addition under occlusal forces or eccentric forces on the implant, various vectors of forces should be applied on implant and surrounding bone, and as a result, lateral and vertical displacement can be occurred. Also the stress evoked bone deformation and it may concentrated on the nearest site from the apex of implant. This phenomenon may resulted by bone resorption especially. We designed short implant with wing shaped structure which was added on the implant neck portion and wanted to know how much this implant resist against occlusal stress. In addition we measured the difference of lateral displacement, vertical displacement, and bone deformation on the nearest portion from the apex of implant. We tested for 4.0 mm diameter and 10.0 mm length implant for control and 7.0 mm length implant with wing size of 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm and 5.6 mm length implant with wing size of 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm. But in 5.6 mm length implant, too much displacement occures even they have large wing especially in vertical displacement. In 7.0 mm length implant, it shows better standing effect even it has 0.5 mm wing by vertical and horizontal direction. By this study we found that less then 8.0 mm length implant can be used by clinicians safely on the maxilla with enlarged sinus, and this may do chang the preconception that less then 8.0 mm length implant is dangerous. And also further study must be considered to put shorter implant into the maxilla.
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KEYWORD
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Wing type implants, Effects on maxillary sinus, Lateral and vertical displacement
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