Journal of Conservative Dentistry
Home About us Editorial Board Instructions Submission Subscribe Advertise Contact e-Alerts Login 
Users Online: 1764
Print this page  Email this page Bookmark this page Small font sizeDefault font sizeIncrease font size
Year : 1999  |  Volume : 2  |  Issue : 4  |  Page : 162-169

Importance Of Cavity Designs In The Fracture Resistance Of Class II Composite Restorations - An In Vitro Study

Correspondence Address:
Shiju Cherian

Login to access the Email id

Source of Support: None, Conflict of Interest: None

Rights and PermissionsRights and Permissions

This is-vitro study was conducted to find the importance of cavity designs in the fracture resistance of class II composite restorations in four different cavity designs. 32 freshly extracted teeth were used in the study. Group I received a mesio-occlusal preparation with extension through the occlusal groove into the central fossa. Group II received a mesio-occlusal slot preparation with retention grooves extending from the gingival floor to the occlusal surface at the axiofacial & axiolingual line angles. Group III received a mesio-occlusal slot preparation as in group II but without retentive grooves; Group IV received a mesio-occlusal slot preparation, without removal of facial or lingual portions of the mesial enamel shell. After the restorations were thermocycled, their marginal ridges were flattened & loaded to failure. Mean (SD) failure loads were 392.37(79.96) N in group I, 353.81(49.23)N in group II, 257.36(73.42)N in group III and 284.73(73.56)N in group IV. Mean failure loads of group I and II were not significantly different from each other but very significantly greater than failure loads of group III and IV. Mean failure loads of group III and IV were not significantly different.

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

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

 Article Access Statistics
    PDF Downloaded57    
    Comments [Add]    

Recommend this journal