›› 2009, Vol. 29 ›› Issue (11): 1295-.

• Monographic report (Prosthodontics) • Previous Articles     Next Articles

Stress analysis of distal-extension removable partial dentures supported by mini implants

HUANG Qing-feng1, JIN Wen-zhong1, ZHANG Fu-qiang1, CUI Wen2, WANG Dong-mei2   

  1. 1. Department of Prosthodontics, Shanghai Key Laboratory of Stomatology, College of Stomatology, The Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200011, China；2. Institute of Biomedical Manufacturing and Life Quality Engineering, School of Mechanical Enginieering, Shanghai Jiaotong University, Shanghai 200240, China
  • Online:2009-11-25 Published:2009-11-24
  • Supported by:

    The Eleventh Five Year Plan National Key Science and Technology Project, 2007BAI18B05; Shanghai Science and Technology Committee Foundation, 08DZ2271100; Shanghai Leading Academic Discipline Fund, S30206; Shanghai Leading Academic Discipline Fund, T0202

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Abstract:

Objective To analyse the stress distribution of distal-extension removable partial dentures supported by mini implants. Methods The finite element analysis models of conventional removable partial dentures (CRPD) and mini implants supported removable partial dentures (ISRPD) were established by modular denture model. The stress distribution of abutments and supporting tissues was compared by finite element analysis software Abaqus 6.5. Results Under vertical loading, the stress of abutment teeth, mucosa of edentulous region and alveolar bone of ISRPD model was lower than that of CRPD model. Under oblique loading, the stress of each part of CRPD model and alveolar bone of ISRPD model significantly increased, while that of abutment teeth and parodontium of ISPRD model decreased. Conclusion The distal-extension removable partial dentures supported by mini implants work well in protecting the abutments and supporting tissues.

Key words: free-end edentulous, implant-supported removable partial dentures, finite element analysis