{"id":3442,"date":"2025-10-16T14:43:31","date_gmt":"2025-10-16T12:43:31","guid":{"rendered":"https:\/\/a-smile.fr\/frequently-asked-questions\/"},"modified":"2026-08-26T10:26:09","modified_gmt":"2026-08-26T08:26:09","slug":"frequently-asked-questions","status":"publish","type":"page","link":"https:\/\/a-smile.fr\/en\/frequently-asked-questions\/","title":{"rendered":"Frequently asked questions"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

What concentration do you recommend for overnight wear?<\/h2>\n
A Smile CP 10% is the reference for overnight whitening.<\/div>\n
\nIts effectiveness, tolerance and slow oxygen release make it the most comfortable solution for gradual and safe whitening.\n\n<\/div>\n
<\/div>\n

What is the average duration of a typical whitening?<\/span><\/h2>\nFor typical discolorations (linked to age or dietary habits), plan for 7 to 10 nights with CP 10%, or 1 hour\/day for 7 to 10 days with CP 16%.\n

<\/h2>\n

Should vestibular reservoirs be created in the trays?<\/h2>\nYes. Reservoirs ensure better distribution of the gel, stable retention and increased effectiveness on vestibular surfaces. \n

<\/h2>\n

How much gel is needed for a complete case?<\/h2>\nOn average, 15 ml of gel (5 syringes of 3 ml) are required for a complete case covering both arches. This volume may vary depending on the severity of the discoloration. \n

<\/h2>\n

Can a patient with sensitive teeth be treated?<\/h2>\nYes, provided they are desensitized beforehand (e.g., desensitizing agent, specific toothpaste), and the application frequency is adapted (for example, every other night).\n

<\/h2>\n

Can A Smile gels damage enamel?<\/h2>\n
Minor, superficial and reversible changes may appear as with any whitening system. However, they are less than those caused by certain acidic or abrasive foods. <\/div>\n
A Smile contains fluoride and potassium nitrate to limit these phenomena. In addition, the near-neutral pH of A Smile gels preserves enamel from iatrogenic alteration risks. <\/div>\n
<\/div>\n

What if the patient sees no results after 4 nights?<\/h2>\n
The onset of results varies according to tooth receptivity, the nature of the discoloration (grey shades take longer to treat) and the amount of gel used.<\/div>\n
In general, the result appears as whitening continues.<\/div>\n
<\/div>\n

How long do results remain stable?<\/h2>\n
On average 2 to 5 years, depending on hygiene, dietary habits (colorants, coffee, red wine) and tobacco.<\/div>\n
Maintenance whitening can be offered occasionally using refills.<\/div>\n
<\/div>\n

Is there a risk of allergic reaction?<\/h2>\nAllergic reactions are very rare. In case of gingival irritation, simply stop whitening temporarily, rinse thoroughly and reassess the tray. \t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n
\n\n\t\t\n
    \n\t\t\t <\/ul>\n <\/div> \n","protected":false},"excerpt":{"rendered":"

    What concentration do you recommend for overnight wear? A Smile CP 10% is the reference for overnight whitening. Its effectiveness, tolerance and slow oxygen release make it the most comfortable solution for gradual and safe whitening. What is the average duration of a typical whitening? For typical discolorations (linked to age or dietary habits), plan for 7 to 10 nights with CP 10%, or 1 hour\/day for 7 to 10 days with CP 16%. Should vestibular reservoirs be created in the trays? Yes. Reservoirs ensure better distribution of the gel, stable retention and increased effectiveness on vestibular surfaces. How much gel is needed for a complete case? On average, 15 ml of gel (5 syringes of 3 ml) are required for a complete case covering both arches. This volume may vary depending on the severity of the discoloration. Can a patient with sensitive teeth be treated? Yes, provided they are desensitized beforehand (e.g., desensitizing agent, specific toothpaste), and the application frequency is adapted (for example, every other night). Can A Smile gels damage enamel? Minor, superficial and reversible changes may appear as with any whitening system. However, they are less than those caused by certain acidic or abrasive foods. A Smile contains fluoride and potassium nitrate to limit these phenomena. In addition, the near-neutral pH of A Smile gels preserves enamel from iatrogenic alteration risks. What if the patient sees no results after 4 nights? The onset of results varies according to tooth receptivity, the nature of the discoloration (grey shades take longer to treat) and the amount of gel used. In general, the result appears as whitening continues. How long do results remain stable? On average 2 to 5 years, depending on hygiene, dietary habits (colorants, coffee, red wine) and tobacco. Maintenance whitening can be offered occasionally using refills. Is there a risk of allergic reaction? Allergic reactions are very rare. In case of gingival irritation, simply stop whitening temporarily, rinse thoroughly and reassess the tray.<\/p>\n","protected":false},"author":142930821,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":{"_uag_custom_page_level_css":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":"","big_sky_generated":false},"class_list":["post-3442","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"newspack-article-block-landscape-large":false,"newspack-article-block-portrait-large":false,"newspack-article-block-square-large":false,"newspack-article-block-landscape-medium":false,"newspack-article-block-portrait-medium":false,"newspack-article-block-square-medium":false,"newspack-article-block-landscape-intermediate":false,"newspack-article-block-portrait-intermediate":false,"newspack-article-block-square-intermediate":false,"newspack-article-block-landscape-small":false,"newspack-article-block-portrait-small":false,"newspack-article-block-square-small":false,"newspack-article-block-landscape-tiny":false,"newspack-article-block-portrait-tiny":false,"newspack-article-block-square-tiny":false,"newspack-article-block-uncropped":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false},"uagb_author_info":{"display_name":"Fr\u00e9d\u00e9ric CARLON","author_link":"https:\/\/a-smile.fr\/en\/author\/fred\/"},"uagb_comment_info":0,"uagb_excerpt":"What concentration do you recommend for overnight wear? A Smile CP 10% is the reference for overnight whitening. Its effectiveness, tolerance and slow oxygen release make it the most comfortable solution for gradual and safe whitening. What is the average duration of a typical whitening? For typical discolorations (linked to age or dietary habits), plan…","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/PgxWRl-Tw","_links":{"self":[{"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/pages\/3442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/users\/142930821"}],"replies":[{"embeddable":true,"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/comments?post=3442"}],"version-history":[{"count":12,"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/pages\/3442\/revisions"}],"predecessor-version":[{"id":14215,"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/pages\/3442\/revisions\/14215"}],"wp:attachment":[{"href":"https:\/\/a-smile.fr\/en\/wp-json\/wp\/v2\/media?parent=3442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}