Modulated photoactivation of composite restoration: measurement of cuspal movement using holographic interferometry

被引：4

作者：

Blazic, Larisa ^{[1
]}

Pantelic, Dejan ^{[2
]}

Savic-Sevic, Svetlana ^{[2
]}

Muric, Branka ^{[2
]}

Belic, Ilija ^{[2
]}

Panic, Bratimir ^{[2
]}

机构：

[1] Univ Novi Sad, Clin Dent Vojvodina, Fac Med, Novi Sad 21000, Serbia

[2] Inst Phys, Belgrade 11080, Zemun, Serbia

来源：

LASERS IN MEDICAL SCIENCE | 2011年 / 26卷 / 02期

关键词：

Composite restoration; Photoactivation; Cuspal movement; Holographic interferometry; CONTRACTION STRESS; SOFTSTART-POLYMERIZATION; DENTAL COMPOSITES; SHRINKAGE STRESS; BOND STRENGTH; GAP FORMATION; CURING MODES; RESIN; CONVERSION; DENSITY;

D O I：

10.1007/s10103-010-0774-0

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The purpose of this research was to investigate the influence of modulated photoactivation on cuspal movement. Eight class II MOD composite restorations were analyzed under various photoactivation protocols in a real-time manner using holographic interferometry. During the first photoactivation protocol, the composite restoration was illuminated for 200 s continuously. In the second protocol, the polymerization lamp was first turned on for 5 s, then turned off for 120 s, and again turned on for a final 195 s. In both protocols, radiant exposure was the same. A significant decrease (p < 0.05) in cuspal deflection was found for two-step irradiation (average value of total cuspal deflection was 5.03 +/- 0.62 A mu m) compared to continuous irradiation (average value of total cuspal deflection was 5.95 A +/- 0.65 A mu m). The two-step photoactivation protocol was found preferable, since it resulted in a significantly lower cuspal deflection (11% lower, compared to the continuous illumination).

引用

页码：179 / 186

页数：8

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