{"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\/sv\/shapeshifting_metals\/","title":{"rendered":"Metaller som \u00e4ndrar form"},"content":{"rendered":"
\n

Tycker du att det \u00e4r jobbigt att g\u00e5 till tandl\u00e4karen? \u00d6nskar du att det fanns ett enklare s\u00e4tt att f\u00e5 det d\u00e4r perfekta leendet?<\/p>\n<\/div>\n

Rymdforskningen bidrar till att minska antalet bes\u00f6k hos tandl\u00e4karen tack vare inf\u00f6randet av formminneslegeringar (SMA). Dessa \u2018smarta\u2019 metaller har en fantastisk f\u00f6rm\u00e5ga att \u2018komma ih\u00e5g\u2019 olika positioner.<\/p>\n

Precis som ett gummiband \u00e5terg\u00e5r de till sin ursprungliga form efter att ha str\u00e4ckts ut eller vikts ihop. Om de b\u00f6js till en ny form kan man genom att v\u00e4rma dem f\u00e5 dem att \u00e5terg\u00e5 till sitt ursprungliga tillst\u00e5nd.<\/p>\n

Det europeiska rymdprogrammet utvecklade dessa legeringar f\u00f6r automatiska omkopplare. De kom dock snart att anv\u00e4ndas inom m\u00e5nga olika omr\u00e5den, bland annat f\u00f6r att reparera benbrott.<\/p>\n

Klamrar tillverkade av b\u00f6jd SMA-tr\u00e5d f\u00e4sts tv\u00e4rs \u00f6ver en fraktur. Kroppsv\u00e4rmen f\u00e5r sedan klamrarna att st\u00e4ngas, vilket drar ihop benen.<\/p>\n

De t\u00e4cker inte bara frakturen utan st\u00e4rker ocks\u00e5 benet tills det har l\u00e4kt. P\u00e5 samma s\u00e4tt kan de anv\u00e4ndas f\u00f6r att styra t\u00e4ndernas r\u00f6relser.<\/p>\n

Ungef\u00e4r en fj\u00e4rdedel av alla barn beh\u00f6ver g\u00e5 till tandl\u00e4karen f\u00f6r att f\u00f6rb\u00e4ttra tandst\u00e4llningen. Med hj\u00e4lp av SMA-apparater g\u00e5r det nu att t\u00e4ppa till mellanrum mellan t\u00e4nderna eller r\u00e4ta ut dem p\u00e5 ett skonsamt men snabbt s\u00e4tt. Det inneb\u00e4r mindre sm\u00e4rta och f\u00e4rre bes\u00f6k hos tandl\u00e4karen.<\/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\/sv\/wp-json\/wp\/v2\/posts\/818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=818"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/818\/revisions"}],"predecessor-version":[{"id":1961,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/818\/revisions\/1961"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=818"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=818"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=818"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=818"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=818"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=818"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=818"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}