In vitro performance of CAD/CAM and conventional removable dentures.

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  • Author(s): Rosentritt M; Strasser T; Behr M; Schmid A
  • Source:
    International journal of computerized dentistry [Int J Comput Dent] 2021 Dec 21; Vol. 24 (4), pp. 385-392.
  • Publication Type:
    Journal Article
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Quintessence Pub. Co Country of Publication: England NLM ID: 100891504 Publication Model: Print Cited Medium: Internet ISSN: 1463-4201 (Print) Linking ISSN: 14634201 NLM ISO Abbreviation: Int J Comput Dent
    • Publication Information:
      Original Publication: New Malden, Surrey ; Carol Stream, Ill. : Quintessence Pub. Co., 1998-
    • Subject Terms:
      Computer-Aided Design* ; Denture, Partial*; Humans ; Materials Testing ; Mechanical Phenomena
    • Abstract:
      Aim: Innovations in CAD/CAM technology and materials science offer new methodologies for removable prosthodontics. As clinical data are still rare, in vitro performance of both CAD/CAM and comparable conventional materials may help to estimate the clinical outcome.
      Materials and Methods: Specimens (n = 8 per group) from teeth (CediTEC, SR VivodentCAD, Vitapan), base materials (V-Print dentbase, IvoBase CAD, Paladur), adhesives (CediTEC Primer/Adhesive, IvoBase CAD Bond), and a fully printed specimen (Try-In) were created. All specimens underwent thermal cycling and mechanical loading (TCML): 1,200,000 × 50 N; 2x3000 x 5°C/55°C; H2O. Surviving specimens were loaded to fracture. Statistical tests used were the Shapiro-Wilk test and the Kaplan-Meier survival, with the level of significance set to α = 0.05.
      Results: Mean loading cycles until failure varied between 100 and 621,667 cycles. Up to five specimens per group failed during TCML. With one exception, all specimens of the entirely CAD/CAM-fabricated group survived TCML. The log-rank (Mantel-Cox) test showed significantly different (P = 0.000) loading cycles between the systems (chi-square test: 28,247; degree of freedom: 8). Failure of the dentures during TCML was characterized by failure of the denture base (2x), denture tooth (13x), mixed base/tooth (3x) or adhesive between base and tooth (1x).
      Conclusion: TCML and fracture testing showed different aspects of denture tooth restoration. The results indicated no correlation between fracture force, fracture pattern, and survival cycles. Denture teeth (milled, heat-pressed), bases (milled, printed, pressed), and primer should be matched up to optimize the performance of dentures.
    • Contributed Indexing:
      Keywords: 3D printing; FEA; TCML; dentures; milling; rapid prototyping; CAD/CAM
    • Publication Date:
      Date Created: 20211221 Date Completed: 20211223 Latest Revision: 20211223
    • Publication Date:
      20240829
    • Accession Number:
      34931774