{"id":818,"date":"2004-12-03T09:53:00","date_gmt":"2004-12-03T08:53:00","guid":{"rendered":"https:\/\/kids.esa.int\/shapeshifting_metals\/"},"modified":"2026-10-08T00:32:38","modified_gmt":"2026-10-07T22:32:38","slug":"shapeshifting_metals","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/shapeshifting_metals\/","title":{"rendered":"Metaller, der skifter form"},"content":{"rendered":"
\n

Gruer du for at g\u00e5 til tandl\u00e6gen? \u00d8nsker du, at der var en nemmere m\u00e5de at f\u00e5 det perfekte smil p\u00e5?<\/p>\n<\/div>\n

Rumforskning bidrager til at reducere antallet af bes\u00f8g hos tandl\u00e6gen takket v\u00e6re indf\u00f8relsen af formhukommelseslegeringer (SMA\u2019er). Disse \u2018intelligente\u2019 metaller har en forbl\u00f8ffende evne til at \u2018huske\u2019 forskellige positioner.<\/p>\n

Ligesom et elastikb\u00e5nd vender de tilbage til deres oprindelige form, n\u00e5r de er blevet strakt eller foldet. Hvis de b\u00f8jes til en ny form, kan de ved hj\u00e6lp af varme bringes tilbage til deres oprindelige tilstand.<\/p>\n

Det europ\u00e6iske rumprogram udviklede disse legeringer til automatiske afbrydere. De fandt dog hurtigt mange anvendelsesmuligheder, herunder reparation af br\u00e6kkede knogler.<\/p>\n

Klammer fremstillet af b\u00f8jet SMA-tr\u00e5d fastg\u00f8res p\u00e5 tv\u00e6rs af et brud. Kropsvarmen f\u00e5r derefter klammerne til at lukke sig, hvorved knoglerne tr\u00e6kkes sammen.<\/p>\n

De lukker ikke blot bruddet, men styrker ogs\u00e5 knoglen, indtil den er helet. P\u00e5 samme m\u00e5de kan de bruges til at styre t\u00e6nderne.<\/p>\n

Omkring en fjerdedel af alle b\u00f8rn har brug for at g\u00e5 til tandl\u00e6gen for at f\u00e5 rettet deres t\u00e6nder. Ved hj\u00e6lp af SMA\u2019er er det nu muligt at lukke mellemrum mellem t\u00e6nderne eller rette dem ud p\u00e5 en sk\u00e5nsom, men hurtig m\u00e5de. Det betyder mindre smerter og f\u00e6rre bes\u00f8g hos tandl\u00e6gen.<\/p>","protected":false},"excerpt":{"rendered":"

Do you dread going to the dentist? Do you wish there was an easier way to obtain that perfect smile? Space research is helping to cut back on visits to […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/12\/dentist_22\/17900050-2-eng-GB\/dentist_2.jpg","esa_banner_description":"","esa_banner_credit":"AP Photo\/Chuck Burton","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/dentist_22","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,54,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-818","post","type-post","status-publish","format-standard","hentry","category-learn","category-space-technologies-on-earth","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=818"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/818\/revisions"}],"predecessor-version":[{"id":1961,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/818\/revisions\/1961"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=818"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=818"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=818"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=818"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=818"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=818"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=818"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}