K. GORSETA1, D. GLAVINA2, R. VAN DUINEN2, I. SKRINJARIC2, R.G. HILL3, and E. LYNCH4, 1Dept. of Pediatric and Preventive Dentistry, University of Zagreb, Zagreb, Croatia, 2University of Zagreb, Zagreb, Croatia, 3Institute of Dentistry , Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, England, 4University of Warwick, Warwick, England
Abstract
Objective: Glass Carbomer® with nanofluor/hydroxyapatite represents a new generation of restorative materials developed from glass with an enhanced remineralisation power. The aim of this clinical trial was to investigate the retention of a Glass Carbomer fissure sealant after 12 months, in comparison to a commonly used conventional resin-based sealant and to do a pilot study using an SEM analysis of the Glass Carbomer after 12 months.
Method: Forty-eight teeth in 24 patients, aged 6-16 years with well-delineated fissure morphology were randomly divided into two equal groups and sealed with either a Bis-GMA resin-based Helioseal F (group A, Ivoclar Vivadent, Liechtenstein) or Glass Carbomer (group B, Glass Carbomer Sealant, Glass Carbomer Products, Netherlands) using a split mouth design. Materials were placed and set according to the manufacturer’s instructions using command set thermo cure for Glass Carbomer (60 ºC for 1 minute) and a polymerization unit for the Helioseal F (Bluephase 16i (Vivadent, Liechtenstein))
Result: Complete sealant retentions in groups A and B were 75% after 12 months of clinical service. There were two new carious lesions in each group. The Mann-Whitney U test revealed no significant difference between the two groups (P>0.05). The SEM analysis of the Glass Carbomer surface revealed particle formation with a hexagonal shape which could be referred to fluorapatite, which often crystallizes into a hexagonal structure with characteristic 120 degree angles between the faces. The possible explanation is that the Glass Carbomer material is mineralized and appears like a pseudo-enamel (mineralized fluor-hydroxyapatite).
Conclusion: The Glass Carbomer material showed a similar retention rate when compared with a resin based sealant and can also be recommended for sealant use in everyday practice. It appears that fluorapatite forms on the Glass Carbomer sealant.
This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
Keywords: Biochemistry, Clinical trials, Fluoride, Human and Sealants
First author
Kristina Gorseta
University of Zagreb, Dept. of Pediatric and Preventive Dentistry
Gunduliceva 5
Zagreb, 10000
Croatia
Second author
Domagoj Glavina
University of Zagreb
Gunduliceva 5
Zagreb, 10000
Croatia
Third author
Raimond van Duinen
University of Zagreb
Gunduliceva 5
Zagreb, 10000
Croatia
Fourth author
Ilija Skrinjaric
University of Zagreb
Gunduliceva 5
Zagreb, 10000
Croatia
Fifth author
Robert Graham Hill
Institute of Dentistry , Barts and The London School of Medicine and Dentistry, Queen Mary University of London
Dental Physical Sciences, Second floor, Francis Bancroft Building
Mile End Road
London, E1 4NS
England
Sixth author
Presenting Author
Edward Lynch
University of Warwick
Warwick Dentistry
Warwick, CV4 7AL
England