Effect of Vertical Misfit on Screw Joint Stability of Implant-Supported Crowns

被引：0
作者：
Wirley Gonçalves Assunção
Juliana Aparecida Delben
Lucas Fernando Tabata
Valentim Adelino Ricardo Barão
Érica Alves Gomes
机构：
[1] Araçatuba Dental School,Department of Dental Materials and Prosthodontics
[2] São Paulo State University (UNESP),Department of Dental Materials and Prosthodontics
[3] Faculdade de Odontologia de Araçatuba,undefined
[4] UNESP,undefined
来源：
Journal of Materials Engineering and Performance | 2011年 / 20卷
关键词：
casting; material selection; optical microscopy; titanium;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The passive fit between prosthesis and implant is a relevant factor for screw joint stability and treatment success. The aim of this study was to evaluate the influence of vertical misfit in abutment-implant interface on preload maintenance of retention screw of implant-supported crowns. The crowns were fabricated with different abutments and veneering materials and divided into 5 groups (n = 12): Gold UCLA abutments cast in gold alloy veneered with ceramic (Group I) and resin (Group II), UCLA abutments cast in titanium veneered with ceramic (Group III) and resin (Group IV), and zirconia abutments with ceramic veneering (Group V). The crowns were attached to implants by gold retention screws with 35-N cm insertion torque. Specimens were submitted to mechanical cycling up to 106 cycles. Measurements of detorque and vertical misfit in abutment-implant interface were performed before and after mechanical cycling. ANOVA revealed statistically significant difference (P < 0.05) among groups for vertical misfit measured before and after mechanical cycling. The abutments cast in titanium exhibited the highest misfit values. Pearson correlation test did not demonstrate significant correlation (P > 0.05) between vertical misfit and detorque value. It was concluded that vertical misfit did not influence torque maintenance and the abutments cast in titanium exhibited the highest misfit values.
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页码：947 / 951
页数：4
相关论文
共 88 条
  • [1] Taylor TD(2002)Twenty Years of Progress in Implant Prosthodontics J. Prosthet. Dent. 88 89-95
  • [2] Agar JR(2003)Cyclic Loading of Implant-Supported Prostheses: Changes in Component Fit Over Time J. Prosthet. Dent. 89 346-351
  • [3] Hecker DM(2004)In Vitro Investigation of Marginal Accuracy of Implant-Supported Screw-Retained Partial Dentures J. Oral Rehabil. 31 477-482
  • [4] Eckert S(2007)Influence of the Implants Inclincation on the Accuracy of the Working Cast Braz. Dent. Sci. 10 16-24
  • [5] Koke U(2007)Measurements of the Rotational Misfit and Implant-Abutment Gap of All-Ceramic Abutments Int. J. Oral Maxillofac. Implants 22 928-938
  • [6] Wolf A(2006)Preloads Generated with Repeated Tightening in Three Types of Screws Used in Dental Implant Assemblies J. Prosthodont. 15 164-171
  • [7] Lenz P(2006)Effect of Casting Procedures on Screw Loosening in UCLA-Type Abutments J. Prosthodont. 15 77-81
  • [8] Gilde H(2005)Custom-Made Laser-Welded Titanium Implant Prosthetic Abutment J. Prosthet. Dent. 94 401-403
  • [9] Assunção WG(2000)Measurement of the Dimensions and Abutment Rotational Freedom of Gold Machined 3i UCLA-Type Abutments in the As-Received Condition, After Casting with a Noble Metal Alloy and Porcelain Firing J. Prosthet. Dent. 84 548-553
  • [10] Delben JA(2004)In Vitro Comparative Analysis of the Fit of Gold Alloy or Commercially Pure Titanium Implant-Supported Prostheses Before and After Electroerosion J. Prosthet. Dent. 92 132-138
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