Comparative evaluation of titanium and DT light posts under tensile and compressive Forces-an in vitro study Kaur Kamleshwar1, Reader, Kaur Ibadatpreet, P. G. Student 1Address for Correspondence: Dr. Kamleshwar Kaur Deptt. Of Prosthetic Dentistry, Sri Guru Ram Das Institute of Dental Sciences And Research, Amritsar.
Online published on 7 December, 2011. Abstract Objective The aim of this in vitro study was to compare the retention and fracture resistance of Titanium and DT Light root canal post systems. Materials and Methods Forty freshly extracted single rooted teeth were selected & mounted in acrylic resin cylinders after horizontal sectioning of their crowns. Root canal treatment was completed and post holes to depth of 8 mm were prepared in them. The samples were randomly allocated to two groups i.e. GI (n=20) and Gil (n=20). GI was tested for retention of Titanium (SGIA; n=10) and DT Light posts (SG IB; n=10); GII was tested for fracture resistance of either post systems i.e. Titanium (SG HA, n=10) and DT Light (SG I IB, n=10). Using Universal Instron Testing Machine, tensile force was applied in GI, while in Gil, after removing the built composite cores at 45° angle to the lingual aspect, the compressive force was applied until samples reached ultimate failure. Results It was found that the Titanium posts were significantly less retentive, however, more resistant to fracture as compared to DT Light posts. Top Keywords Titanium post, DT Light post, tensile strength, compressive strength. Top |