Goal:
06 - Temiz Su ve Sanitasyon

Project Logo
Description
AMAÇ 6: TEMİZ SU VE SIHHİ KOŞULLAR Herkes için erişilebilir su ve atık su hizmetlerini ve sürdürülebilir su yönetimini güvence altına almak Su kıtlığı, dünya genelinde insanların %40’tan fazlasını etkiliyor; iklim değişikliği sonucunda küresel ısınma nedeniyle, zaten kaygı verici düzeyde olan bu oranın daha da yükseleceği tahmin ediliyor. 1990 yılından bu yana 2,1 milyar insanın daha iyi su ve sıhhi koşullara erişmesi sağlanmış olmakla birlikte, güvenli içme suyu kaynaklarının azalması, tüm kıtaları etkileyen büyük bir sorundur.

Filters

20181
Reset filters

Settings

Author: Coleman, Nichola Jayne ×

Publication Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    PublicationOpen Access
    Effect of Er:YAG laser enamel conditioning and moisture on the microleakage of a hydrophilic sealant
    (2018-07-01) Guclu, Zeynep Asli; Hurt, Andrew Paul; Donmez, NAZMİYE; Coleman, Nichola Jayne; DÖNMEZ, NAZMİYE
    For a given sealant, successful pit and fssure sealing is principally governed by the enamel conditioning technique and the presence of moisture contamination. A new generation of hydrophilic resin sealants is reported to tolerate moisture. This study investigates the impact of Er:YAG laser pre-conditioning and moisture contamination on the microleakage of a recent hydrophilic sealant. Occlusal surfaces of extracted human molars were either acid etched (n = 30), or successively lased and acid etched (n = 30). Ten teeth from each group were either air-dried, water-contaminated, or saliva-contaminated prior to sealing with UltraSeal XT® hydro™. Samples were inspected for penetration of fuchsin dye following 3000 thermocycles between 5 and 50 °C, and the enamel–sealant interfaces were observed by scanning electron microscopy (SEM). Signifcant diferences in microleakage were evaluated using the Mann–Whitney U test with Bonferroni adjustment (p = 0.05). Laser pre-conditioning signifcantly reduced dye penetration irrespective of whether the enamel surface was moist or dry. Microleakage of water-contaminated acid etched teeth was signifcantly greater than that of their air-dried or saliva-contaminated counterparts. SEM analysis demonstrated good adaptation in all groups with the exception of water-contaminated acid etched teeth which exhibited relatively wide gaps. In conclusion, this hydrophilic sealant tolerates the presence of saliva, although water was found to impair its sealing ability. Laser pre-conditioning signifcantly decreases microleakage in all cases.