{"id":32653,"date":"2026-03-29T06:22:54","date_gmt":"2026-03-29T10:22:54","guid":{"rendered":"https:\/\/cliniqueomicron.ca\/?p=32653"},"modified":"2026-08-30T09:37:16","modified_gmt":"2026-08-30T13:37:16","slug":"osteoporosis-prevention-bone-fragility-40-years","status":"publish","type":"post","link":"https:\/\/cliniqueomicron.ca\/en\/blogue-osteoporose-prevention-fragilite-osseuse-40-ans\/","title":{"rendered":"Osteoporosis: prevent bone fragility starting at age 40"},"content":{"rendered":"<p class=\"wp-block-paragraph\" align=\"left\">Une fracture de la hanche apr\u00e8s une simple chute. Une vert\u00e8bre qui s&#8217;affaisse sans traumatisme. Une douleur dorsale chronique dont la cause n&#8217;est identifi\u00e9e que des ann\u00e9es plus tard. L&#8217;ost\u00e9oporose se manifeste souvent de cette fa\u00e7on, par ses complications, sans avoir donn\u00e9 le moindre signe avant. C&#8217;est pr\u00e9cis\u00e9ment pourquoi la pr\u00e9vention et le d\u00e9pistage pr\u00e9coce ont tant d&#8217;importance dans cette maladie.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Au Canada, environ deux millions de personnes vivent avec l&#8217;ost\u00e9oporose, et les fractures ost\u00e9oporotiques repr\u00e9sentent une cause majeure de morbidit\u00e9, de perte d&#8217;autonomie et de mortalit\u00e9 chez les personnes \u00e2g\u00e9es (Ost\u00e9oporose Canada, 2023).<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">Ce qui se passe dans l&#8217;os<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Le tissu osseux est en constant renouvellement. Des cellules appel\u00e9es ost\u00e9oclastes d\u00e9gradent l&#8217;os ancien, tandis que des ost\u00e9oblastes forment de l&#8217;os nouveau. Jusqu&#8217;\u00e0 environ 30 ans, la formation l&#8217;emporte sur la r\u00e9sorption et la masse osseuse augmente. Ensuite, le bilan se stabilise, puis avec l&#8217;\u00e2ge, et particuli\u00e8rement apr\u00e8s la m\u00e9nopause chez les femmes, la r\u00e9sorption l&#8217;emporte progressivement sur la formation.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">L&#8217;ost\u00e9oporose r\u00e9sulte de ce d\u00e9s\u00e9quilibre prolong\u00e9 : l&#8217;os perd de sa densit\u00e9 et de sa microarchitecture, devenant plus poreux et plus fragile. Une fracture peut alors survenir pour un traumatisme minimal, dit de fragilit\u00e9, comme une chute de sa propre hauteur ou m\u00eame un simple mouvement brusque pour les fractures vert\u00e9brales.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">Les facteurs de risque \u00e0 conna\u00eetre<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">L&#8217;\u00e2ge et le sexe f\u00e9minin sont les facteurs non modifiables les plus importants. La m\u00e9nopause acc\u00e9l\u00e8re la perte osseuse en raison de la chute des \u0153strog\u00e8nes, qui exercent un effet protecteur sur le tissu osseux. Les ant\u00e9c\u00e9dents familiaux de fractures ost\u00e9oporotiques, notamment une fracture de hanche chez un parent du premier degr\u00e9, augmentent significativement le risque.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Du c\u00f4t\u00e9 des facteurs modifiables, une alimentation pauvre en calcium et en vitamine D, la s\u00e9dentarit\u00e9, le tabagisme, la consommation excessive d&#8217;alcool et un indice de masse corporelle tr\u00e8s bas sont associ\u00e9s \u00e0 une densit\u00e9 osseuse plus faible. Certains m\u00e9dicaments, notamment les corticost\u00e9ro\u00efdes pris \u00e0 long terme, les inhibiteurs de l&#8217;aromatase et certains anti\u00e9pileptiques, r\u00e9duisent la densit\u00e9 osseuse et justifient un suivi sp\u00e9cifique.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">Le d\u00e9pistage par densitom\u00e9trie osseuse<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">La densitom\u00e9trie osseuse par absorptiom\u00e9trie biphotonique aux rayons X, ou DXA, est l&#8217;examen de r\u00e9f\u00e9rence pour mesurer la densit\u00e9 min\u00e9rale osseuse. Elle est indolore, rapide et expose \u00e0 une dose de rayonnement tr\u00e8s faible. Au Qu\u00e9bec, elle est recommand\u00e9e syst\u00e9matiquement pour toutes les femmes de 65 ans et plus, et plus t\u00f4t en pr\u00e9sence de facteurs de risque. Les hommes de 70 ans et plus ou ceux avec des facteurs de risque significatifs sont \u00e9galement \u00e9ligibles.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Le r\u00e9sultat est exprim\u00e9 en T-score. Un T-score entre 0 et -1 est normal. Entre -1 et -2,5, on parle d&#8217;ost\u00e9op\u00e9nie. En dessous de -2,5, le diagnostic d&#8217;ost\u00e9oporose est pos\u00e9. Ces valeurs sont interpr\u00e9t\u00e9es en contexte clinique global, int\u00e9grant les autres facteurs de risque pour calculer le risque fracturaire \u00e0 dix ans.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">La pr\u00e9vention d\u00e8s 40 ans<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Les apports ad\u00e9quats en calcium, soit environ 1000 mg par jour pour les adultes, et en vitamine D, soit 800 \u00e0 2000 UI par jour selon le profil, sont les bases de la pr\u00e9vention. L&#8217;activit\u00e9 physique avec mise en charge, comme la marche, la danse ou les exercices avec poids, stimule la formation osseuse et am\u00e9liore la coordination et l&#8217;\u00e9quilibre, r\u00e9duisant ainsi le risque de chutes.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">D\u00e8s 40 ans, ces habitudes ont un impact mesurable sur la densit\u00e9 osseuse \u00e0 long terme. C&#8217;est bien avant la m\u00e9nopause que les fondations se construisent.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">Questions fr\u00e9quentes sur l&#8217;ost\u00e9oporose<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\"><strong>Are dairy products essential for bones?<\/strong><br \/>Ils sont une source de calcium facilement assimilable, mais pas la seule. Les l\u00e9gumes verts feuillus, les l\u00e9gumineuses, le tofu, les boissons v\u00e9g\u00e9tales enrichies et les poissons en conserve avec ar\u00eates sont d&#8217;autres sources. L&#8217;important est d&#8217;atteindre les apports quotidiens recommand\u00e9s, quelle que soit la source.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\"><strong>L&#8217;ost\u00e9oporose touche-t-elle aussi les hommes ?<\/strong><br \/>Yes, though less frequently than women. Men over 70 years old, or those with specific risk factors such as hypogonadism, prolonged corticosteroid therapy, or a history of fragility fracture, are affected.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\"><strong>Les m\u00e9dicaments contre l&#8217;ost\u00e9oporose sont-ils n\u00e9cessaires ?<\/strong><br \/>Pas syst\u00e9matiquement. La d\u00e9cision de traiter repose sur le risque fracturaire calcul\u00e9, pas uniquement sur la densit\u00e9 osseuse. Pour les cas \u00e0 haut risque, les bisphosphonates et d&#8217;autres classes m\u00e9dicamenteuses ont d\u00e9montr\u00e9 une efficacit\u00e9 solide dans la r\u00e9duction des fractures.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\" align=\"left\">When to consult a healthcare professional<\/h3>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Si vous avez 65 ans ou plus, si vous avez eu une fracture apr\u00e8s un traumatisme minimal, si vous prenez des corticost\u00e9ro\u00efdes au long cours ou si vous avez des facteurs de risque significatifs, une consultation m\u00e9dicale pour \u00e9valuer votre densit\u00e9 osseuse s&#8217;impose.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\" align=\"left\">Un m\u00e9decin ou une infirmi\u00e8re praticienne sp\u00e9cialis\u00e9e peut prescrire la densitom\u00e9trie osseuse, interpr\u00e9ter les r\u00e9sultats et proposer un plan de pr\u00e9vention ou de traitement adapt\u00e9. Une consultation en pr\u00e9sentiel ou en <a style=\"color: #4d6577; font-weight: 600;\" href=\"https:\/\/cliniqueomicron.ca\/telemedecine\/\">teleconsultation<\/a> dans l&#8217;un des points de service de <a style=\"color: #4d6577; font-weight: 600;\" href=\"https:\/\/cliniqueomicron.ca\/\">Omicron Clinic<\/a> au Qu\u00e9bec vous permet d&#8217;y acc\u00e9der sans d\u00e9lai.<\/p>\r\n<p><blockquote class=\"wp-embedded-content\" data-secret=\"7rtXVwGlGu\"><a href=\"https:\/\/cliniqueomicron.ca\/tous-nos-services\/\">All our services<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u00abAll our services - Clinique Omicron\" src=\"https:\/\/cliniqueomicron.ca\/tous-nos-services\/embed\/#?secret=72iCiHdy3r#?secret=7rtXVwGlGu\" data-secret=\"7rtXVwGlGu\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\r\n<p align=\"left\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Osteoporosis in Quebec: Risk Factors, Bone Densitometry Screening, and Prevention Options from Age 40. Clinical Guide by Clinique Omicron.<\/p>","protected":false},"author":8,"featured_media":32560,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"_metasync_otto_title":"Ost\u00e9oporose : pr\u00e9venir la fragilit\u00e9 osseuse d\u00e8s 40 ans","_metasync_otto_description":"Ost\u00e9oporose : pr\u00e9ventions et d\u00e9pistage au Qu\u00e9bec d\u00e8s 40 ans. Clinique Omicron : acc\u00e8s rapide, RAMQ + priv\u00e9 et t\u00e9l\u00e9m\u00e9decine.","_metasync_otto_keywords":"ost\u00e9oporose, pr\u00e9vention, sant\u00e9 osseuse, d\u00e9pistage densit\u00e9 osseuse, facteurs de risque, consultation m\u00e9dicale, clinique m\u00e9dicale, Clinique Omicron","_metasync_otto_og_title":"","_metasync_otto_og_description":"","_metasync_otto_twitter_title":"","_metasync_otto_twitter_description":"Otites r\u00e9cidivantes enfant Qu\u00e9bec : causes, antibiotiques, tubes transtympaniques. \u00c9valuation m\u00e9dicale dans notre r\u00e9seau.","rank_math_title":"Ost\u00e9oporose : pr\u00e9venir la fragilit\u00e9 osseuse d\u00e8s 40 ans | Clinique Omicron","rank_math_description":"Ost\u00e9oporose au Qu\u00e9bec : facteurs de risque, d\u00e9pistage par densitom\u00e9trie osseuse et options de pr\u00e9vention d\u00e8s 40 ans. 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Services RAMQ et priv\u00e9s dans nos points de service au Qu\u00e9bec.","_metasync_seo_title":"","_metasync_seo_desc":"","_metasync_breadcrumb_title":"","_metasync_primary_category":0,"_metasync_primary_product_cat":0,"_metasync_imported_seo_title":"","_metasync_imported_seo_desc":"","_metasync_otto_disabled":"","_metasync_hreflang":"","_metasync_plugin_sync_ts":"{\"aioseo\":\"2026-08-19T01:03:33+00:00\"}","_metasync_robots_advanced":"","_metasync_og_title":"","_metasync_og_description":"","_metasync_twitter_title":"","_metasync_twitter_description":"Otites r\u00e9cidivantes enfant Qu\u00e9bec : causes, antibiotiques, tubes transtympaniques. \u00c9valuation m\u00e9dicale dans notre r\u00e9seau.","footnotes":""},"categories":[66,69,70],"tags":[723,719,1159,1158,263,668,1043,724],"class_list":["post-32653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq-mythes-sante","category-sante-bien-etre","category-soins-medicaux","tag-calcium","tag-densite-osseuse","tag-densitometrie","tag-fracture","tag-menopause","tag-osteoporose","tag-vieillissement","tag-vitamine-d"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Ost\u00e9oporose : pr\u00e9ventions et d\u00e9pistage au Qu\u00e9bec d\u00e8s 40 ans. 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