European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
June 2019
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
27
Issue:
2

Comparison of Marginal and Internal Defects of Indirect Inlay Patterns Fabricated Using Additive Manufacturing and Traditional Methods – An Ex Vivo Study

Introduction: This study aimed at exploring clinical translation of additive manufacturing
methods for fabrication of inlay restorations. Materials and methods: On a selected human
premolar tooth sample an inlay cavity was prepared. A silicon impression of the tooth was
recorded and ten die-casts were poured. Ten inlay wax patterns were fabricated using traditional method. An optical impression of the tooth model was obtained and 20 computeraided inlay designs were fabricated and optimised for additive manufacturing. Ten models
were fabricated by micro-stereolithography and the other ten were fabricated using selective laser sintering. 30 inlay patterns were cast into cobalt chromium metal inlays. For 30
metal inlays, marginal and internal gaps were measured using a silicone-replica-technique,
observed under a scanning electron microscope. Results: The measured internal gaps
were: Internal-gaps in Conventional lost wax technique (138 ± 8.7), micro-stereolithography
(200 ± 7.4) and selective laser sintering (203 ± 11.8). The marginal gaps were: Conventional
lost wax technique (162.12 ± 6.8), micro-stereolithography (198 ± 10.3) and scanning laser
sintering (203 ± 6.6) Conclusions: The marginal gap and internal gap of a conventional
lost wax technique were significantly improved compared with microstereolithography
and selective laser sintering (P<0.05). However, according to previous criteria for maximum
allowable discrepancy (100 – 200 µm) microstereolithography may represent a potential
future alternative for indirect inlay fabrication.

Keywords
Selective Laser Sintering
Computer Aided Design
Additive Manufacturing
Micro Stereolithography

10.1922/EJPRD_01877Peddi10

Article Price
£15.00
Institution Article Price
£
Page Start
66
Page End
75
Authors
Dr. Shanmukh Srinivas Peddi, Dr. Vivek Taduri, Dr. Ashwini Shivakumar

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. Clinical Factors Influence the Trueness of Intra-oral Scanning
  2. 51
  3. 55

  1. Accuracy of inlay and onlay restorations based on 3D printing or milling technique - a pilot study
  2. 56
  3. 64

  1. Comparison of Marginal and Internal Defects of Indirect Inlay Patterns Fabricated Using Additive Manufacturing and Traditional Methods – An Ex Vivo Study
  2. 66
  3. 75

  1. Influence of Ceramic Materials on Biomechanical Behavior of Implant Supported Fixed Prosthesis with Hybrid Abutment
  2. 76
  3. 82

  1. Early Effect of Implant Supported Rehabilitation and Nocturnal Bruxism on Maximum Occlusal Force: A Cross-Sectional Study
  2. 84
  3. 89

  1. Clinical Survival of Indirect, Anterior Surface-Retained Fiber-Reinforced Composite Fixed Dental Prosthesis: Up to 3-Year Follow-up
  2. 90
  3. 94