지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 3 - 11 (9page)
이용수
초록· 키워드
오류제보하기
Study Design: Mechanical study. Purpose: To compare the pullout strength of different screw designs and augmentation techniques in an osteoporotic bone model. Overview of Literature: Adequate bone screw pullout strength is a common problem among osteoporotic patients. Various screw designs and augmentation techniques have been developed to improve the biomechanical characteristics of the bone–screw interface. Methods: Polyurethane blocks were used to mimic human osteoporotic cancellous bone, and six different screw designs were tested. Five standard and expandable screws without augmentation, eight expandable screws with polymethylmethacrylate (PMMA) or calcium phosphate augmentation, and distal cannulated screws with PMMA and calcium phosphate augmentation were tested. Mechanical tests were performed on 10 unused new screws of each group. Screws with or without augmentation were inserted in a block that was held in a fixture frame, and a longitudinal extraction force was applied to the screw head at a loading rate of 5 mm/ min. Maximum load was recorded in a load displacement curve. Results: The peak pullout force of all tested screws with or without augmentation was significantly greater than that of the standard pedicle screw. The greatest pullout force was observed with 40-mm expandable pedicle screws with four fins and PMMA augmentation. Augmented distal cannulated screws did not have a greater peak pullout force than nonaugmented expandable screws. PMMA augmentation provided a greater peak pullout force than calcium phosphate augmentation. Conclusions: Expandable pedicle screws had greater peak pullout forces than standard pedicle screws and had the advantage of augmentation with either PMMA or calcium phosphate cement. Although calcium phosphate cement is biodegradable, osteoconductive, and nonexothermic, PMMA provided a significantly greater peak pullout force. PMMA-augmented expandable 40-mm four-fin pedicle screws had the greatest peak pullout force.
목차
등록된 정보가 없습니다.
참고문헌 (29)
참고문헌 신청
Babat LB / 2004 / Spinal surgery in patients with Parkinson's disease: construct failure and progressive deformity / Spine (Phila Pa 1976) 29:2006~2012
Cook SD / 2004 / Biomechanical study of pedicle screw fixation in severely osteoporotic bone / Spine J 4:402~408
Cook SD / 2001 / Lumbosacral fixation using expandable pedicle screws. an alternative in reoperation and osteoporosis / Spine J 1:109~114
Lei W / 2006 / Biomechanical evaluation of an expansive pedicle screw in calf vertebrae / Eur Spine J 15:321~326
Derincek A / 2006 / Biomechanical comparison of anatomic trajectory pedicle screw versus injectable calcium sulfate graftaugmented pedicle screw for salvage in cadaveric thoracic bone / J Spinal Disord Tech 19:286~291
Cook SD / 2004 / Biomechanical study of pedicle screw fixation in severely osteoporotic bone / Spine J 4:402~408
Cook SD / 2001 / Lumbosacral fixation using expandable pedicle screws. an alternative in reoperation and osteoporosis / Spine J 1:109~114
Lei W / 2006 / Biomechanical evaluation of an expansive pedicle screw in calf vertebrae / Eur Spine J 15:321~326
Derincek A / 2006 / Biomechanical comparison of anatomic trajectory pedicle screw versus injectable calcium sulfate graftaugmented pedicle screw for salvage in cadaveric thoracic bone / J Spinal Disord Tech 19:286~291
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