Many adults who want whiter teeth also have some dental work: a crown on a front tooth, tooth-coloured fillings, or a veneer from years ago. Whitening gels only work on natural tooth structure, so restorations stay the same colour while the teeth around them become lighter. Without planning, this can leave noticeable mismatches. With the right sequence, you can achieve an even, natural-looking smile.
Whitening gels lighten teeth by breaking down coloured molecules within the enamel and dentine. Porcelain, ceramic and composite resin do not have this structure, so they do not respond to bleaching. A crown matched to your natural tooth shade years ago will look darker once the surrounding teeth are whitened.
If you are planning new crowns, veneers or front fillings, the ideal approach is to whiten your natural teeth first. Once the colour has stabilised, usually after about two weeks, the dentist can match the new restorations to your brighter shade. This avoids having to replace brand-new work later.
If you have older front crowns or fillings, your dentist will discuss whether replacing them after whitening is worthwhile. Small composite fillings are often inexpensive to replace or polish. Crowns and veneers are a bigger investment, so you may decide to whiten only to a shade that still blends with them, or plan their replacement.
Fillings and crowns on back teeth are usually not visible when you smile, so they rarely affect the decision to whiten. Your dentist will still check that existing fillings are sealed properly, because whitening gel seeping under a leaking filling can cause sensitivity.
At your consultation, the dentist will record your current shade, examine your restorations and help you choose a realistic target. Photographs and a shade guide make it easier to visualise the end result. Being clear about your goals early prevents disappointment and avoids unnecessary replacement of dental work.
No. Professional whitening gels do not damage porcelain or composite, but they will not change their colour either.
Most dentists recommend waiting around two weeks so the tooth colour stabilises and the bonding is not affected.
Composite fillings cannot be bleached, but they can sometimes be polished to remove surface staining or replaced to match your new shade.
Plan a whitening treatment that blends with your existing dental work. Learn more about teeth whitening in Al Ain.
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