MicroCT And Macro Cutting&Banding System Analysis Of Bone Around Orthodontic Mini-implants

ObjectIn the therapeatic process of orthodontic treatment,mini-implant is popular and widely uesd as a new for its flexible and simple.The stability of implant-bone interface is important for the success of implant.The implant-bone interface is commonly evaluated in histologic section by morphometrical measurements.But the processing is time consuming and the procedure has a destructive nature.The aim of this study was to validate the efficacy of Micro-CT(micro computed tomography, resolution up to10μm) and Macro Cutting&Banding Systerm for analysis of bone structure around orthodontic mini-implant by comparing micro-computed tomographic images with their histologic homologues.Method15orthodontic mini-implant(ORLUS,Ortholution CO.,Korea)were placed in the buccal jaw bone of5beagle dogs. The experimental animals were sacrificed after3months, cylindrical samples containing implant were made. Specimens were scanned with Micro-CT and reconstructed three dimensionally. Histologic sections were subsequently made.Calculate bone volume and implant bone contact, accroding to the implant sits.Result1、 The bone volume,measured on the histologic slide and microCT image which has same thickness with histologic section had statistically significant differencese(P<0.05).2、 The bone volume,measured on μCT108and μCT1800, had same thickness with histologic section had statistically significant differencese(P<0.05).3、The bone implant contact, measured on the histologic slide and microCT image which has same thickness with histologic section had statistically significant differencese (P<0.05).4、The bone volume, measured on the micro-CT image (uCT108), had statistically significant differencese (P<0.05).5、The implant bone contact, measured on the micro-CT image (uCT108) had statistically significant differencese (P<0.05)Conclusion:These results showed significant differencese between parameters measured through histologic slide and micro-computed tomography. And this study presented a way of analysis on bone around orthodontic mini-implant with micro-computed tomographic image and Macro Cutting&Banding Systerm.