Journal of Pharmacy And Bioallied Sciences
Journal of Pharmacy And Bioallied Sciences Login  | Users Online: 733  Print this pageEmail this pageSmall font sizeDefault font sizeIncrease font size 
    Home | About us | Editorial board | Search | Ahead of print | Current Issue | Past Issues | Instructions | Online submission

Year : 2012  |  Volume : 4  |  Issue : 6  |  Page : 384-389

Finite element analysis of stresses in fixed prosthesis and cement layer using a three-dimensional model

1 Department of Prosthodontics, Vivekanandha Dental College for Women, Elayampalayam, Tiruchengodu, India
2 Department of Prosthodontics, Sri Ramachandra Medical University, Porur, Chennai, India
3 Department of Prosthodontics, Nooral Islam College of Dental Science, NICE Garden, Aralummood, Neyyatinkara, Kerala, India

Correspondence Address:
Arunachalam Sangeetha
Department of Prosthodontics, Vivekanandha Dental College for Women, Elayampalayam, Tiruchengodu
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0975-7406.100291

Rights and Permissions

Context: To understand the effect of masticatory and parafunctional forces on the integrity of the prosthesis and the underlying cement layer. Aims: The purpose of this study was to evaluate the stress pattern in the cement layer and the fixed prosthesis, on subjecting a three-dimensional finite element model to simulated occlusal loading. Materials and Methods: Three-dimensional finite element model was simulated to replace missing mandibular first molar with second premolar and second molar as abutments. The model was subjected to a range of occlusal loads (20, 30, 40 MPa) in two different directions - vertical and 30° to the vertical. The cements (zinc phosphate, polycarboxylate, glass ionomer, and composite) were modeled with two cement thicknesses - 25 and 100 μm. Stresses were determined in certain reference points in fixed prosthesis and the cement layer. Statistical Analysis Used: The stress values are mathematic calculations without variance; hence, statistical analysis is not routinely required. Results: Stress levels were calculated according to Von Mises criteria for each node. Maximum stresses were recorded at the occlusal surface, axio-gingival corners, followed by axial wall. The stresses were greater with lateral load and with 100-μm cement thickness. Results revealed higher stresses for zinc phosphate cement, followed by composites. Conclusions: The thinner cement interfaces favor the success of the prosthesis. The stresses in the prosthesis suggest rounding of axio-gingival corners and a well-established finish line as important factors in maintaining the integrity of the prosthesis.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded85    
    Comments [Add]    
    Cited by others 1    

Recommend this journal