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The International Journal of Prosthodontics
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Int J Prosthodont 32 (2019), No. 1     28. Jan. 2019
Int J Prosthodont 32 (2019), No. 1  (28.01.2019)

Page 68-70, doi:10.11607/ijp.5955, PubMed:30677115


Influence of Connector Diameter on Fracture Load of CAD/CAM-Processed Monolithic Lithium Disilicate Fixed Partial Dentures
Junker, Rüdiger / Höller, Matthias / Yoshida-Anastasova, Yana / Frank, Wilhelm / Nothdurft, Frank P.
Purpose: To investigate the influence of connector diameter on the mechanical load to fracture in monolithic three-unit lithium disilicate fixed partial dentures (FPDs).
Materials and Methods: A total of 24 FPDs were designed and manufactured using computer-aided design/computer-assisted manufacturing (CAD/CAM) with connector diameters of 16 mm2, 12 mm2, or 9 mm2 (Groups A, B, and C, respectively; n = 8 for each group). After thermal and mechanical aging, the FPDs were subjected to mechanical load-to-fracture assessment.
Results: Fracture loads of Groups B (834 ± 105 N) and C (796 ± 41 N) were significantly lower compared to Group A (990 ± 65 N).
Conclusion: Connector dimensions proved to be crucial for fracture resistance of monolithic lithium disilicate FPDs.