• Users Online: 764
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 
ORIGINAL ARTICLE
Year : 2005  |  Volume : 5  |  Issue : 3  |  Page : 146-151

Effect of ring liner and casting ring temperature on the dimensional changes in morphologic cast posts:An in vitro study


Department of Prosthodontics Nair hospital dental college, Dental College, Mumbai-400008, India

Correspondence Address:
V Abhyankar
Dept. of Prosthodontics, Nair Hospital Dental College, Mumbai-400008
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-4052.18002

Rights and Permissions

Prosthodontic treatment of an endodontically treated tooth poses a challenge to the practitioner. Endodontic therapy has provided a solution to retain mutilated teeth. Coronoradicular reconstruction in the form of cast post and core is used as a method to provide retention and resistance form to the restoration. Endodontically treated teeth are dessicated, inelastic and brittle& have lower resistance to caries. Their inability to form secondary dentin makes them weak and susceptible to fracture. To prevent fracture and support crown and bridge, reinforcement in the form of intraradicular devices is being used. A cast post is one such method. Vertical and horizontal root fractures can occur as a result of excessive removal of tooth structure during root canal treatment, dowel placement or inceasing the width of the dowel. A cast post and core should fit passively in the canal. Even a minimally oversized post can lead to transfer of stresses to the canal walls and increase the risk of root fracture. Therefore it is necessary to ensure that there is passive fit of the post and core. Shrinkage of the mould cavity is desired during the casting process to allow a passive fit. The effect of lined and unlined rings in the dimensional behaviour of the investment during setting and subsequent heating has been investigated and it is shown that casting made of unlined rings are undersized.


[FULL TEXT] [PDF]*
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
    Viewed7898    
    Printed116    
    Emailed0    
    PDF Downloaded285    
    Comments [Add]    

Recommend this journal