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Master Thesis

Mesures in vivo du changement de couleur des dents naturelles sous l'effet de la déshydratation : étude d'un groupe de patients de plus de 50 ans

Abstract : Objectives : To asses in patients over fifty years any change in tooth colour resulting from dehydration and the time required for any change to return to baseline. Material and Method : 20 subjects with intact maxillary central incisors (age between 50 and 64, sex ratio=1) were recruited. Spectrophotometric measurements were taken before dehydration and after rubber dam isolation at 3, 6, 9, 12, 15, 20, 30 min. Teeth were alowed to rehydrate and measurements were taken every 10 min for 30 min. Tooth colour was assessed at cervical, middle and incisal areas. Data was collected in CIE L*, a*, b*, C, h° colour coordinates. Results : All colour coordinates showed significant differences during the periods of dehydration and rehydration, except h° in cervicale region after 30 min of rehydration. Conclusions : Teeth became lighter and more saturated when dehydrated. 30 min were necessary to no longer perceive colour differences in aged subjects (∆E close to 1). Most daily procedures lead to dehydration. It is important to carrie out the shade matching procedure at the beginning of the appointment to avoid unacceptable mismatch of colour between natural teeth and dental restoration.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01511617
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Submitted on : Monday, August 21, 2017 - 1:04:25 PM
Last modification on : Wednesday, January 15, 2020 - 9:03:57 AM
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Clara Chambon. Mesures in vivo du changement de couleur des dents naturelles sous l'effet de la déshydratation : étude d'un groupe de patients de plus de 50 ans. Chirurgie. 2017. ⟨dumas-01511617⟩

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