ELIZA

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560012 occurrences (No.18 in the rank) during 5 years in the PubMed. [no cache] 500 found

310) As determined by pQCT analysis, the treated defects had a higher bone mineral content, bone area and bone density than control defects.

--- ABSTRACT ---

PMID:23225778 DOI:10.1002/term.1655

2015 Journal of tissue engineering and regenerative medicine

* A uni-cortical femoral defect model in the rat: evaluation using injectable hyaluronan hydrogel as a carrier for bone morphogenetic protein-2.

- The development of biomaterial for bone regeneration requires animal models that are reliable and designed to mimic clinically relevant situations. We have previously investigated hydrogels comprised of modified hyaluronic acid and polyvinyl alcohol in models of ectopic bone formation. This hydrogel induces bone regeneration when loaded with bone morphogenetic proteins (BMPs). To allow further optimization of hydrogels, we developed a new, femoral, non-critical-sized cortical defect model. In the rat femur, we drilled standardized, elongated unilateral cortical defects that did not require stabilization and that could be created bilaterally to allow paired comparisons of biomaterials. After optimizing the defect size, subsequent stress fractures occurred in only 8% and the defect healed partially over the 40 day study period. In a time-course experiment, we treated bone defects with the previously studied hyaluronan hydrogel loaded with 10 µg hydroxyapatite and 6 µg BMP-2. The shape of the defect allowed controlled containment of the material within the defect. The defect in the right leg was left untreated, while the left defect was filled with 40 µl of the BMP hydrogel. As determined by pQCT analysis, the treated defects had a higher bone mineral content, bone area and bone density than control defects. The relative difference was greatest between the groups at 10 and 20 days and diminished as the defect healed in the untreated legs. We conclude that this animal model allows facile and rapid screening of biomaterials for bone regeneration in cortical femoral defects without requiring external fixation.

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(2)63 null	(13)6 with	(24)3 we	(35)2 no
(3)35 was	(14)5 based	(25)3 yielded	(36)2 patients
(4)22 and	(15)5 on	(26)2 (FEA)	(37)2 results
(5)21 showed	(16)5 were	(27)2 allele	(38)2 reveals
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--- WordNet output for analysis --- =>詳細な検討, 分解, 分析, 解析, 見方, 精神分析 Overview of noun analysis The noun analysis has 6 senses (first 3 from tagged texts) 1. (45) analysis -- (an investigation of the component parts of a whole and their relations in making up the whole) 2. (5) analysis, analytic thinking -- (the abstract separation of a whole into its constituent parts in order to study the parts and their relations) 3. (2) analysis -- (a form of literary criticism in which the structure of a piece of writing is analyzed) 4. analysis -- (the use of closed-class words instead of inflections: e.g., `the father of the bride' instead of `the bride's father') 5. analysis -- (a branch of mathematics involving calculus and the theory of limits; sequences and series and integration and differentiation) 6. psychoanalysis, analysis, depth psychology -- (a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud; "his physician recommended psychoanalysis") --- WordNet end ---