用聚合收缩仪Acuvol测定填料含量对复合树脂聚合收缩率的影响.pdf

北京大学学报(医学版
JOURNAL OF PEKING UNIVERSITY(HEALTH SCIENCES)Vol 42 No5 Oct 2010
论著
用聚合收缩仪 Acuvol测定填料含量对复合树脂
聚合收缩率的影响
韩冰,董艳梅≌,王晓燕,田福聪,高学军
(北京大学口腔医学院?口腔医院牙体牙髓科,北京100081)
摘要]目的:研究改变填料含量对复合树脂聚合收缩率的影响,探讨 Acuvol聚合收缩仪的应用价值。方:研
究共使用9种复合树脂,包括6种定制的填料含量分别为80%,78%,76%,70%,60%,50%的复合树脂,以及3种
复合树脂商品:含80%填料的SynD%6树脂、含74%填料的 Syn Compact Nano树脂和含55%填料的 Syn Flow树脂
(填料含量均以质量分数表示)。制备半球形树脂样本,用功率为650mW/em2卤灯固化40s(n=10),分别使用
Acuvol I的SVVR模式和MVVR模式测定树脂样本的聚合收缩率。結累:3种商品树脂的聚合收缩率为: Syn Flow>
Syn Compact Nano>SynD6。6种定制树脂的聚合收缩率为填料含量50%>60%>70%>76%>78%>80%。商
品树脂、巸制树脂的填料含量和聚合收缩均呈负相关关系(r为-0.982、-0.968,P<0.001)。使用多帧成像(mul
tiple- view volumetric reconstruction,MWVR)模式、单帧成像( single- view volumetric reconstruction,SVVR)模式测定复合
树脂的聚合收缩率,其结果差异无统计学意义(t=0.385,P>0.05)。:填料含量是影响复合树脂聚合收缩的
重要因素, Acuvol聚合收缩仪可以快速、准确地测定复合树脂的聚合收缩率,MVR模式和SVVR模式结果差异无
统计学意义,SVVR模式更加快捷。
[关键词]复合树脂;聚合收缩;图像处理,计算机辅助
中图分类号]R781.05[文献标识码]A[文章编号]1671-167X(2010)050582-04
doi:10.3969/j.isn.1671-167X.2010.05.019
Effect of filler content of composite resins on polymerization shrinkage measured by a
video imaging apparatus(Acuvol)
DONG Yan-mei, WANG Xiao-yan, TIAN Fu-cong, GAO Xue-jun
时m
oar ment of Cariology, Endodontology and Operative Dentistry, Peking University School and Hospital of Stomatology
ng 100081, China)
ABSTRACT Objective To investi ate he effect of filler content on the polymerization shrinkage of resins
and to evaluate whether Acuvol is a simple and easy method in volumetric shrinkage measurement
Methods: Six experimental resins with filler contents of%, 78%, 76%, 70%, 60, and 50% were
made. Three commercial resins were Syn D6 with 80% filler content, Syn Compact Nano with 74% filler
ent and Syn Flow with 55% filler content(using the mass fraction to express the filler content
semi-sphere samples of these composites were manually formed and light cured for 40 s using a
quartz tungsten halogen unit at 650 mw/cm(n =10). The volumetric shrinkage was measured in both
SVVR and MVR modes using Acuvol. Results: The volumetric shrinkage of the three commercial resins
were Syn Flow Syn Compact Nano> Syn D6. The shrinkage values of the six experimental resins with
different filler contents were: 50%> 60%>70%0 >76%>78%>80%. The negative correlation be
tween filler content and volumetric shrinkage of commercial and experimental resins were strongly
(-0.982 and 0.968 respectively, P<0. 001). No significant dif erence between SVVR and M]VR
des (t=0. 385, P>0.05).Conclusion: The present results support the view that filler content is
one of the most important factors influencing polymerization shrinkage of composites. Acuvol provides an
easy method for measuring polymerization shrinkage of composites. Both SVR and MVVR modes of Acu
vol give reproducible results
KEY WORDS Composite resins; Polymerization shrinkage; Image processing, computer-assisted
复合树脂主要由树脂基质和无机填料组成,固分子间距离约为0.3~0.4nm,而聚合后基质分子
化前基质分子间靠范德华力和氢键形成微弱连接,形成网状连接,分子间距离仅为0.154mm。分子
基金项目:国家自然科学基金(50742009,50830101)、卫生部部属(管)医院临床重点项目和首都医学发展科研基金(2007-1006)资助
Suppoed y the ational Naura c ene Founation of hina507420 50301 iica Reseah Fun, Miis of Health of China and the
Capital Foundation for Medical Research and Development(2007-1006)
ACorespondingauthorse-mail,kqdongyanmei@bjm.edu.cn