EFFECT OF CATHA EDULIS (KHAT) EXTRACT ON COLOR STABILITY OF ACRYLIC RESIN DENTURE TEETH: AN IN-VITRO STUDY

Abstract

Background and aim: Long-term denture tooth color stability for patients is an important criterion in choosing the types of dental materials to use as one of the main concerns in treatment. Discoloration of denture teeth may result in patient dissatisfaction and an additional expense for their replacement. In Yemen, khat (Catha Edulis) chewing habit may affect the color of acrylic denture teeth. The aim of this study was to assess the effect of khat extract on color stability of reinforced acrylic resin denture teeth. Materials and Methods: Experimental design carried to 3 brands of reinforced acrylic resin teeth from three manufacturers, Vitapan, FX-Anterior and Shanghai-SND were evaluated 40 specimens (maxillary central incisors) of each brand were selected systematically and grouped into A, B and C respectively. All samples were stored in distilled water (DW) at 37 °C for 24 hours after which baseline colorimetric measurements were recorded by colorimeter. All the specimens were immersed for 24 hours daily and kept in an incubator at 37°C for 30 days. The KH was changed every 24 hours. Colorimeter was used for color change testing of each specimen after 10, 20 and 30 days on CIE L* a* b*. Then the collected data was analyzed using SPSS version 23. Results: The results of this study shows that there was a significant effect of KH on acrylic teeth (p<0.001). Also, a significant interaction between the three brands acrylic teeth and KH was found (p<0.05). The effect of time on acrylic teeth color stability was statistically significant (p<0.05). The brands teeth specimens at 10, 20 and 30 days in KH revealed more significantly color change than DW (p<0.05). Conclusions: The khat homogenate (KH) causes discoloration on the 3 brands of reinforced acrylic teeth and the discoloration increases with the passage of time. The change of discoloration is acceptable clinically except in SND teeth. Vitapin teeth has more color stable compared to FX teeth and SND teeth. Peer Review History: Received: 12 February 2023; Revised: 13 March; Accepted: 25 April 2023, Available online: 15 May 2023 Academic Editor: Prof. Dr. Gorkem Dulger, Duzce University, Turkey, gorkemdulger@yandex.com Received file: Reviewer's Comments: Average Peer review marks at initial stage: 6.0/10 Average Peer review marks at publication stage: 7.0/10 Reviewers: Dr. Khaled A AL-Haddad,Orthodontics, Pedodontics and Prevention Department Faculty of Dentistry, Sana'a University, Yemen, ya_haddadi@yahoo.com Dr. Masoomeh S Ghahfarokhi, University of Benin, Nigeria, mshamsgh@yahoo.com