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Research Article

Aim: The aim of this study In maxillary first premolar tooth deficiency, occlusal loads on different materials that are frequently used in the clinic; is to examine the stress levels transmitted to the abutment teeth and applied restorations and the stress distribution in the restorations. Material and Method: In order to examine the stress level and distribution in maxillary first premolar deficiency, a two-layer restoration with two different bridge designs was designed with CAD and a vertical load of 700N was transmitted to the restoration and stress levels on the abutment teeth and restorations were determined by finite element analysis (ABAQUS). The stress distribution in the restoration was investigated. In order to carry out this examination, tooth number 14 was considered to be missing. To compensate for the deficiency, a bridge design (6Br) with the abutment of the first molar and second premolar, the pontic of the first premolar and a bridge design (3Br) with the abutment of the second premolar and canine, and the pontic of the first premolar were made. Von Misess analysis was carried out using different substrate material (Cr-Co (CC) / 3-YTZP (YZ) / lithium disilicate (LD) / leucite (L)). Results: The maximum Von Misess (mVM) values for all applied infrastructure materials were lower for 3Br. While mVM values appeared as L<LD<YZ<CC for 3Br, they emerged as L<LD<CC<YZ for 6BR. For 3Br, higher stress was transmitted to the canine tooth in all materials, while higher stress was transmitted to the second premolar in all materials for 6Br. Conclusion: In maxillary first premolar deficiency, bridges applied by extending the cantilever from the first and second premolars to the first premolars are always more stressed, and if possible, it would be more appropriate to plan a conventional bridge by using the canine as a support instead of the first molar.

Mehmet Gookberkkaan Demirel
Necmettin Erbakan University
Turkey

Reza Mohammadi
Necmettin Erbakan University
Iran

Ali Riza Tuncdemir
Necmettin Erbakan University
Turkey

 


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