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Thesis presentation/ fixed orthodontics courses
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Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.

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Thesis presentation/ fixed orthodontics courses Presentation Transcript

  • 1. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • 2. Failure of the bond between acrylic resin teeth to acrylic denture base is very common many attempts have been made to im prove this bond . www.indiandentalacademy.com
  • 3. To evaluate the shear bond strength between acrylic resin teeth to denture base, after surface treatment with Monomer, silane coupling agent as surface conditioning materials. www.indiandentalacademy.com
  • 4. To compare and evaluate the surface conditioning agents, monomer and silane coupling agent with a control group and determine either monomer or silane coupling agent conditioning increases the bond strength on applying shear loads. www.indiandentalacademy.com
  • 5. A plastic poly vinyl chloride (p.v.c) rings of 10 cm height and 0.5 inch width were cut from a long pipe. The 10cm p.v.c pipes were adhered to a steel base using sticky wax and sheets of modelling wax was melted and poured till the brim of the p.v.c. pipes, care was taken to fill up all defective areas formed due to shrinking of wax. www.indiandentalacademy.com
  • 6. Premadent crosslinked acrylic molar and premolar teeth were taken and they were ground till the ridge lap area with a tungsten carbide bur and they were polished with a buff to obtain smooth surface. www.indiandentalacademy.com
  • 7. The prepared teeth were fixed in the p.v.c rings which were filled with wax and the teeth were sealed with a hot wax spatula The wax-tooth assemblies were positioned in the flask with the teeth turned up dental plaster was poured up to the border of the p.v.c rings www.indiandentalacademy.com
  • 8. www.indiandentalacademy.com
  • 9. . The plaster was allowed to set and then a layer of cold mould seal was applied and left to dry. The remaining part of the flask was filled with a mixture of dental plaster and stone and the lid was closed and the flask was pressed ( 1,250 kg f ) for 30mins. www.indiandentalacademy.com
  • 10. After the plaster had set , the flask was placed in boiling water for 15mins for dewaxing. Next the wax was eliminated by running hot water , complete elimination of wax was important from the p.v.c rings and the teeth ridge lap area as wax causes a detrimental effect in bonding. www.indiandentalacademy.com
  • 11. The 2 sets of 96 teeth were dived into 3 groups based on the method of surface conditioning SM1 (control) : no surface conditioning SM2 (monomer) : Two coats of heat cured monomer is applied over the ridge lap area and they were left to evaporate for 5 mins. SM3 (silane) : Two coats of silane coupling agent was applied over the ridge lap area and they were left to evaporate for 5 mins. www.indiandentalacademy.com
  • 12. www.indiandentalacademy.com
  • 13. Curing Procedure: A short curing cycle was employed to cure the specimens www.indiandentalacademy.com
  • 14. The prepared specimens were loaded on to UTM- INSTRON UNIVERSAL TESTING MACHIN. A point force was applied by a stainless steel pin tip of 1mm in diameter, until fracture occurred. www.indiandentalacademy.com
  • 15. www.indiandentalacademy.com
  • 16. A One-way- Analyses of variance (ANOVA) was used to find the significance of breaking strengths between different samples which were coated with different surface conditioning materials. Student ‘t’ test was used to find the significance of breaking strengths between sample types www.indiandentalacademy.com
  • 17. 0 50 100 150 200 250 300 Pre molar Molar Pre-molar + Molar Control group Bondstrength(newtons) www.indiandentalacademy.com
  • 18. 0 50 100 150 200 250 300 350 400 450 500 Pre molar Molar Pre-molar + Molar Monomer Bondstrength(newtons) www.indiandentalacademy.com
  • 19. 0 100 200 300 400 500 600 700 Pre molar Molar Pre-molar + Molar Silane Bondstrength(newtons) www.indiandentalacademy.com
  • 20. Rehabilitating an edentulous patient with a successful denture is a challenging task. The most common type of failure of acrylic denture is debonding of acrylic teeth from denture. This can be overcome by improving the adhesion between the acrylic teeth and denture base Our studies have proved that surface treatment of acrylic teeth with conditioning materials like monomer and silane coupling agent will improve the bond to a great extent. www.indiandentalacademy.com
  • 21. The present study evaluated the bond strength of acrylic teeth to the acrylic denture base using different surface conditioning materials like monomer and silane coupling agents There was a significant improvement in the bond strength with surface conditioners The order of shear bond strength of samples is control < monomer< silane coupling agent www.indiandentalacademy.com
  • 22. THANK YOU For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com