Effect of different application and polymerization techniques on the microleakage of proximal resin composite restorations in vitro.
This in vitro study investigated cervical microleakage of proximal resin composite restorations placed with three application and polymerization techniques. Uniform mesio-occlusal-distal (MOD) preparations featuring cervical margins above (mesial) and below (distal) the CEJ suitable for restoration with resin composite were copy milled into 33 recently extracted permanent molars. The teeth were divided randomly into three groups of 11 teeth and restored using a conventional incremental technique (Group A) and two novel curing devices (Groups B and C). After 24 hours, a dye penetration test was used to assess microleakage. Conventional placement in preparations with cervical margins in enamel had significantly lower interfacial leakage scores than those recorded for placement in preparations with margins in cementum regardless of the technique used to place the restorative material. Use of the two novel curing devices conferred no advantage in reducing microleakage irrespective of where preparation margins were placed.
Brunton
Paul A
PA
Unit of Integrated Restorative Care, University Dental Hospital of Manchester, Manchester, United Kingdom. paul.brunton@man.ac.uk
Kassir
Ali
A
Dashti
Maha
M
Setcos
James C
JC
D000134:Acid Etching, Dental; D003188:Composite Resins / Q000737:chemistry*; D017076:Computer-Aided Design; D003737:Dental Cavity Preparation / Q000145:classification; D003739:Dental Cementum / Q000473:pathology; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent / Q000145:classification; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005456:Fluorescent Dyes; D006801:Humans; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D012235:Rhodamines; D018709:Statistics, Nonparametric; D019237:Tooth Cervix / Q000473:pathology
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005456:Fluorescent Dyes; D011108:Polymers; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D012235:Rhodamines; C403464:SureFil packable composite; C029773:rhodamine B