上颌前磨牙不同固位型单端IPS e.max CAD粘接桥的抗折强度研究

doi:10.13701/j.cnki.kqyxyj.2022.12.013

口腔医学研究 ›› 2022, Vol. 38 ›› Issue (12): 1167-1170.DOI: 10.13701/j.cnki.kqyxyj.2022.12.013

上颌前磨牙不同固位型单端IPS e.max CAD粘接桥的抗折强度研究

李美康¹, 韩碧潭², 王学谦², 陈志宇^1*, 安奕霖¹, 马晓平³

1.河北医科大学口腔医学院·口腔医院修复科,河北省口腔医学重点实验室,河北省口腔疾病临床医学研究中心河北石家庄 050017;
2.河北医科大学口腔医学院河北石家庄 050017;
3.河北医科大学口腔医学院·口腔医院技工中心河北石家庄 050017

收稿日期:2022-06-15 出版日期:2022-12-28 发布日期:2022-12-26
通讯作者: *陈志宇,E-mail:kqxfchen@163.com
作者简介:李美康(1987~ ),女,河北辛集人,硕士,主治医师,研究方向:口腔数字化技术、粘接桥。
基金资助:
2020年度河北省医学科学研究课题计划(编号:20201196);2022年河北省大中学生科技创新能力培育专项项目(编号:22E50058D);河北医科大学大学生创新性实验计划项目(编号:USIP2021325)

Flexural Strength of Maxillary Premolar Restored with Resin-bonded IPS e.max CAD Ceramic Cantilever Bridge in Different Retention-form Design

LI Meikang¹, HAN Bitan², WANG Xueqian², CHEN Zhiyu^1*, AN Yilin¹, MA Xiaoping³

1. Department of Prosthodontics, Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, School and Hospital of Stomatology, Hebei Medical University, Shijiazhuang 050017, China;
2. School of Stomatology, Hebei Medical University, Shijiazhuang 050017, China;
3. Restoration Technician's Studio of Hospital of Stomatology Hebei Medical University, Shijiazhuang 050017, China

Received:2022-06-15 Online:2022-12-28 Published:2022-12-26

摘要/Abstract

摘要： 目的: 研究不同固位型设计对上颌前磨牙单端IPS e.max CAD粘接桥抗折强度的影响。方法: 选取离体上颌前磨牙30颗,随机分为3组(n=10),A组:牙合支托固位型;B组:D形固位型;C组:覆盖腭尖型。制作IPS e.max CAD单端粘接桥,树脂水门汀粘接,万能力学试验机测试各组粘接桥的破坏载荷力值并观察折裂模式。结果: A组、B组、C组破坏载荷分别为(269.91±69.49)N、(279.79±35.21)N、(394.33±88.37)N。A组破坏载荷力值小于B组,差异不显著(P>0.05),C组破坏载荷力值大于A组和B组,且差异均有统计学意义(P<0.01)。折裂模式以粘接桥连接体处折裂最多。结论: 3种固位型单端粘接桥均能满足临床修复需求,覆盖腭尖型单端粘接桥具有更佳的抗折性能。

关键词: 单端粘接桥, 固位型, 全瓷, 破坏载荷

Abstract: Objective: To study the influence of different retention form designs on the fracture resistance of resin-bonded IPS e.max CAD ceramic cantilever bridge for maxillary premolars. Methods: Thirty intact adult maxillary premolars were selected and divided into three groups randomly (n=10). Group A: single-retainer of occlusal rest; group B: single-retainer of D-shape; and group C: single-retainer covering the palatal cusp. Prostheses were fabricated with IPS e.max CAD blocks and then cemented with resin cement. Fracture strength and failure mode were tested in a universal testing machine. Results: The fracture strength of group A, group B, and group C were (269.91±69.49) N, (279.79±35.21) N, and (394.33±88.37) N. The fracture strength of group B was higher than that of group A, but the difference was not significant (P>0.05). Group C had significantly higher fracture strength than groups A and B (P<0.01). The predominant failure mode was connector fracture. Conclusion: All three types of resin-bonded cantilever bridges can meet clinical requirements. The design of single-retainer covering the palatal cusp exhibited promising fracture properties.

Key words: resin-bonded cantilever bridge, retention form, all-ceramic, fracture load

李美康, 韩碧潭, 王学谦, 陈志宇, 安奕霖, 马晓平. 上颌前磨牙不同固位型单端IPS e.max CAD粘接桥的抗折强度研究[J]. 口腔医学研究, 2022, 38(12): 1167-1170.

LI Meikang, HAN Bitan, WANG Xueqian, CHEN Zhiyu, AN Yilin, MA Xiaoping. Flexural Strength of Maxillary Premolar Restored with Resin-bonded IPS e.max CAD Ceramic Cantilever Bridge in Different Retention-form Design[J]. Journal of Oral Science Research, 2022, 38(12): 1167-1170.

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上颌前磨牙不同固位型单端IPS e.max CAD粘接桥的抗折强度研究

Flexural Strength of Maxillary Premolar Restored with Resin-bonded IPS e.max CAD Ceramic Cantilever Bridge in Different Retention-form Design

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