티타늄 실린더의 초기 고정력이 뼈 재생에미치는영향
Initial Stability Efect of Titanium Cylinder on Bone Regeneration
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Initial mechanical stability of implant inserted in bone is wel accepted as a requirement for obtaining good bone healing. However. the experimental evidence for this concept is hardly found. The present study examined the efect of micromovement of titanium cylinder on bone regeneration after placing it loosely in the trabecular bone of femur head of rabbits. Titanium cylinders of 3.5 mm in diameter were placed in the hole prepared with drils of 3.4 mm or 3.8 mm in diameter. Titanium cylinder was wel secured in the narrower hole. while freely moved in the wider hole. Bone area (BA) and bone-implant contact (BIC) were measured using microfocus X-ray CT system in the valey of cylinder. BA and BIC were higher in the analysis of movable cylinder group when compared to the tightly secured group after 2 weeks. although statisticaly insignificant due to the smal number of samples. There was no diference in BA and BIC on the study of 4 weeks groups. In summary. experimental group of titanium cylinders with which the initial micromovement was permited by placing them in the wide hole did not show lower bone regeneration compared to the cylinders tightly secured in the bone through whole experimental period. These resu1ts indicate. within the limits of this study. that the initial micromovement is not a detrimental factor in the bone regeneration of titanium implant. Furthermore. the initial mechanical stability may not be an unconditional prerequisite for obtaining good osseointegration around titanium implant.
Abstract
Initial mechanical stability of implant inserted in bone is wel accepted as a requirement for obtaining good bone healing. However. the experimental evidence for this concept is hardly found. The present study examined the efect of micromovement of titanium cylinder on bone regeneration after placing it loosely in the trabecular bone of femur head of rabbits. Titanium cylinders of 3.5 mm in diameter were placed in the hole prepared with drils of 3.4 mm or 3.8 mm in diameter. Titanium cylinder was wel secured in the narrower hole. while freely moved in the wider hole. Bone area (BA) and bone-implant contact (BIC) were measured using microfocus X-ray CT system in the valey of cylinder. BA and BIC were higher in the analysis of movable cylinder group when compared to the tightly secured group after 2 weeks. although statisticaly insignificant due to the smal number of samples. There was no diference in BA and BIC on the study of 4 weeks groups. In summary. experimental group of titanium cylinders with which the initial micromovement was permited by placing them in the wide hole did not show lower bone regeneration compared to the cylinders tightly secured in the bone through whole experimental period. These resu1ts indicate. within the limits of this study. that the initial micromovement is not a detrimental factor in the bone regeneration of titanium implant. Furthermore. the initial mechanical stability may not be an unconditional prerequisite for obtaining good osseointegration around titanium implant.
참고문헌 (23)
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