›› 2009, Vol. 29 ›› Issue (11): 1291-.

• Monographic report (Prosthodontics) • Previous Articles     Next Articles

Stress analysis of precision attachment dentures for mandibular distal-extension edentulous cases

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 precision attachment dentures used in distal-extension edentulous cases. Methods The finite element models of conventional removable partial dentures and precision attachment dentures were established by modular denture model, and the models of precision attachment dentures were established with 4-4 as one abutment or 43-34as two abutments. The stress distribution of abutments and supporting tissues was compared by finite element analysis software Abaqus 6.5. Results Under vertical loading or oblique loading, the stress of abutments and supporting tissues from attachment dentures with two abutments was significantly lower than that from attachment dentures with one abutment. The stress of conventional removable partial dentures significantly increased under oblique loading. Conclusion It is reasonable for the design of attachment dentures with two abutments for mandibular distal-extension edentulous cases.

Key words: free-end edentulous, attachment dentures, precision, finite element analysis