The Effectiveness of tooth whitening products in the Maltese market - A Clinical Study

Authors: Emad Eddin Alzoubi, Fares Elgaroushi, Ikechi McBerry, Gabriella Gatt, Nikolai Attard

Corresponding: Emad Eddin Alzoubi (

Keywords: Tooth whitening, Tooth shade, Oral health

Doi: 10.7423/XJENZA.2020.2.03

Background: Tooth whitening has gained popularity in recent years, with many products emerging on the market. Aim: To assess the effectiveness of different tooth whitening products, highlight any undesirable effects of whitening on the oral soft tissues, and evaluate if tooth whitening can serve as a motivational tool for patients to improve their oral hygiene. Method: 127 participants were invited to join the study and 77 were enrolled in the study according to the selection criteria. They were randomly divided into 8 groups, each group receiving a different tooth-bleaching product. Data collection was performed at 4 different time-points. Results: 39% of participants were excluded due to suboptimal oral health, thus emphasizing the need for a routine check-up before treatment. Only professional tooth whitening provided by dental professionals showed significant tooth shade improvements (Kruskal–Wallis tests p < 0.05). Tooth whitening had no significant impact on oral soft tissues (Kruskal–Wallis test p > 0.05). Tooth whitening can serve as a motivating tool to improve patients’ oral health. Conclusions: Tooth whitening procedures should be carried out by dental professionals. Only non-over the counter (OTC) products showed significant colorimetric shade improvement. Whitening treatment had no significant impact on oral soft tissues. The achieved tooth whitening directly improved oral health.

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