A  COMPARATIVE  EVALUATION  OF THE OVERALL ADAPTATION AND PASSIVITY IN COPINGS OBTAINED BY LASER METAL SINTERING AND CONVENTIONAL  CASTING  TECHNIQUE: AN  IN  VITRO  STUDY

DR.  MANAN  BUCH; PROF.(DR.) KRISHNA  PRASAD  D.; DR. CHETHAN  HEGDE

Volume : VI, Issue : III, March - 2016

A COMPARATIVE EVALUATION OF THE OVERALL ADAPTATION AND PASSIVITY IN COPINGS OBTAINED BY LASER METAL SINTERING AND CONVENTIONAL CASTING TECHNIQUE: AN IN VITRO STUDY

Dr. Manan Buch, Prof. Dr. Krishna Prasad D. , Dr. Chethan Hegde

Abstract :

OBJECTIVE:In vitro study was done to assess the overall adaptability and pas siv ity of copings faicated by laser sintering technique and by conventional technique.METHODOLOGY: Thirty extracted maxillary premolars were prepared using torpedo bur taking care to maintain constant taper of the preparation. Samples were divided into conventional casting and laser sintering group. Passivity of copings was evaluated using strain gauge. Overall adaptability was evaluated using light body silicone material. Internal gap was checked by measuring the thickness of silicone material under optical microscope.RESULTS: Strain generated by coping faicated using conventional and laser casting method were 15.67 µ and 14.67µ respectively. Overall gap was highest on occlusal central region as compared to mesial and distal axial surfaces for both the groups. CONCLUSION: Copings faicated by both the methods do not have significant difference in their passivity and overall adaptability.