Comparative study of microleakage by using different finished lines in selective laser melting metal crowns

Abstract

Abstract: PURPOSE: To evaluate microleakage of SLM Co -Cr alloy metal crown with two types finished line (chamfer and shoulder), compared with conventional fabrication of Co -Cr alloy metal crowns. METHODS: Thirty healthy non-carious human molars were selected and randomly assigned to 3 groups, 10 in each. Teeth in group A and C received a chamfer finish line preparation, whereas teeth in group C received a shoulder finish line. Conventional Co -Cr alloy metal crowns were fabricated for group A when SLM metal crowns were made for group B and group C. Glass ionomer was applied for bonding. After 5000 thermocycles ranging from 5℃ to 55℃,all the specimens were evaluated by dye penetration and then microleakage was examined under light microscope. The data were analyzed statistically with SPSS 20.0 software package. RESULTS: Microleakage in group A was significantly higher than the other two groups, group B and group C showed no significant difference in microleakage while microleakage in group B was higher than that in group C. CONCLUSIONS: Microleakage of SLM metal crowns was significantly less than that of conventional Co-Cr alloy metal crowns; chamfer finish line designs was recommended for SLM metal crowns in consideration of reducing microleakage and protecting tooth.

Key words: Selective laser melting, Co -Cr alloy, Microleakage, Shear finished line

CLC Number:

R783.1

PENG Yan, ZHONG Qun, WU Xue-ying, Weng Jia-wei. Comparative study of microleakage by using different finished lines in selective laser melting metal crowns[J]. Shanghai Journal of Stomatology, 2016, 25(6): 668-672.

References

[1] Takaichi A, Nakamoto T, Joko N, et al. Microstructures and mechanical properties of Co-29Cr-6Mo alloy fabricated by selective laser melting process for dental applications [J].J Mech Behav Biomed Mater, 2013, 21(1): 67-76.
[2] Al Jabbari YS, Koutsoukis T, Barmpagadaki X, et al. Metallurgical and interfacial characterization of PFM Co-Cr dental alloys fabricated via casting, milling or selective laser melting [J]. Dent Mater, 2014, 30(4): e79-88.
[3] 李国强, 沈晴昳, 高建华, 等. 选择性激光熔覆钴铬合金与瓷的结合性能研究 [J]. 实用口腔医学杂志, 2012, 28(3): 302-305.
[4] 忻贤贞, 项楠, 陈洁, 等. 选择性激光熔化技术制作牙科钴铬合金的电化学腐蚀性能研究 [J]. 上海交通大学学报(医学版), 2012, 32(5): 602-604.
[5] Xu D, Xiang N, Wei B. The marginal fit of selective laser melting fabricated metal crowns: an in vitro study [J]. J Prosthet Dent, 2014, 112(6): 1437-1440.
[6] 李靖敏, 王维倩, 马婧媛. 选择性激光熔化钴铬合金基底冠与铸造钴铬合金基底冠边缘适合性比较[J]. 口腔医学, 2014, 34(5): 353-356.
[7] Blatz MB, Sadan A, Martin J, et al. In vitro evaluation of shear bond strengths of resin to densely-sintered high-purity zirconium-oxide ceramic after long-term storage and thermal cycling [J]. J Prosthet Dent, 2004, 91(4): 356-362.
[8] Contrepois M, Soenen A, Bartala M, et al. Marginal adaptation of ceramic crowns: a systematic review [J]. J Prosthet Dent, 2013, 110(6): 447-452.
[9] Shiratsuchi H, Komine F, Kakehashi Y, et al. Influence of finish line design on marginal adaptation of electroformed metal-ceramic crowns [J]. J Prosthet Dent, 2006, 95(3): 237-242.
[10] Akbar JH, Petrie CS, Walker MP, et al. Marginal adaptation of Cerec 3 CAD/CAM composite crowns using two different finish line preparation designs [J]. J Prosthodont, 2006, 15(3): 155-163.
[11] Cho SH, Nagy WW, Goodman JT, et al. The effect of multiple frings on the marginal integrity of pressable ceramic single crowns [J].J Prosthet Dent, 2012, 107(1): 17-23.
[12] Wu AY, Donovan TE. A modified one-step putty-wash impression technique [J]. J Prosthet Dent, 2007, 98(3): 245-246.
[13] Koyuturk AE, Akca T, Yucel AC, et al. Effect of thermal cycling on microleakage of a fissure sealant polymerized with different light sources [J]. Dent Mater J, 2006, 25(4): 713-718.
[14] Schmid-Schwap M, Graf A, Preinerstorfer A, et al. Microleakage after thermocycling of cemented crowns—a meta-analysis [J]. Dent Mater, 2011, 27(9): 855-869.
[15] Tjan AH, Dunn JR, Grant BE. Marginal leakage of cast gold crowns luted with an adhesive resin cement [J]. J Prosthet Dent, 1992, 67(1): 11-15.
[16] De Munck J, Van Landuyt K, Peumans M, et al. A critical review of the durability of adhesion to tooth tissue: methods and results [J]. J Dent Res, 2005, 84(2): 118-132.
[17] Tay FR, Pashley DH, Hiraishi N, et al. Tubular occlusion prevents water-treeing and through-and-through fluid movement in a single-bottle, one-step self-etch adhesive model [J]. J Dent Res, 2005, 84(10): 891-896.
[18] Quante K, Ludwig K, Kern M. Marginal and internal fit of metal-ceramic crowns fabricated with a new laser melting technology [J]. Dent Mater, 2008, 24(10): 1311-1315.
[19] 李国强, 沈晴昳, 高建华, 等. 选择性激光熔技术与铸造法制作全冠适合性的比较研究 [J].中华口腔医学杂志, 2012, 47(7): 427-430.
[20] Xin XZ, Chen J, Xiang N, et al. Surface properties and corrosion behavior of Co-Cr alloy fabricated with selective laser melting technique [J]. Cell Biochem Biophys, 2013, 67(3): 983-990.
[21] 刘翠玲, 李保, 杨丽媛, 等. 边缘形态与黏结剂对铸造金属全冠边缘适合性影响的析因分析 [J]. 口腔颌面修复学杂志, 2015, 16(4): 241-244.
[22] 贺玺, 李江, 张艳, 等. 不同黏结剂和不同边缘设计对冠边缘微渗漏的影响 [J].吉林大学学报(医学版), 2012, 38(4): 766-769.
[23] 洪煜锐, 叶剑涛, 林璇, 等. 激光熔覆技术烤瓷冠边缘适合性的实验研究[J]. 现代口腔医学杂志, 2014, 28(5): 285-288.
[24] Pera P, Gilodi S, Bassi F, et al. In vitro marginal adaptation of alumina porcelain ceramic crowns[J]. J Prosthet Dent, 1994, 72(6): 585-590.
[25] 翁维民, 李莹, 张富强. 牙体制备形态对Cerec 全瓷冠边缘适合性的影响分析 [J]. 上海口腔医学, 2008, 17(3): 293-296.
[26] Euán R, Figueras-Álvarez O, Cabratosa-Termes J, et al. Comparison of the marginal adaptation of zirconium dioxide crowns in preparations with two different finish lines [J]. J Prosthodont, 2012, 21(4): 291-295.
[27] 陈思宇, 余佳, 陈青娅, 等. 烤瓷烧结对金瓷固定桥边缘适合性的影响 [J]. 四川大学学报(医学版), 2010, 41(3): 536-537.