Influence of Inlays/Onlays and Their Material on Stress Distribution in Mandibular Molars: Finite Element Analysis
محل انتشار: مجله تحقیقات دندانپزشکی، دوره: 14، شماره: 4
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 129
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شناسه ملی سند علمی:
JR_AJDR-14-4_007
تاریخ نمایه سازی: 28 تیر 1402
چکیده مقاله:
Background: This study aimed to evaluate the influence of inlays/onlays and their material on
stress distribution in mandibular molars with large cavities, using finite element analysis (FEA).
Methods: ۳D models of the first mandibular molar were created. Then, a mesio-occluso-distal cavity was
created, and cusps were reduced (۱.۵ mm for buccal cusps and ۱ mm for lingual cusps). The restorations
were: inlay, onlay that covered buccal cusps (B models), and onlay that covered all cusps (LB models).
Inlays and onlays were represented by two materials: nanofill composite resin and polymer-infiltrated
ceramic network (PICN). Vertical load of ۶۰۰ N was applied and von Mises stresses were calculated.
Results: Inlay models showed higher stress concentration in tooth structures than onlay models. Composite
resin inlays and onlays transmitted most of the stress to adjacent structures. On the other hand, PICN
inlays/onlays absorbed most of stress and transmitted less stress to dental structures than composite resin
restorations. Moreover, stress concentrations in PICN onlay models (B-buccal cusps and LB-all cusps)
were similar, while composite resin LB onlay showed higher stress concentration in dental structures than
composite resin B onlay.
Conclusions: Onlays showed better stress distribution than inlays. PICN might be a suitable choice as a
restorative material of inlay/onlay for large cavities in molars, while the composite resin is unfavorable
material for such restorations in terms of stress redistribution in dental structures.
کلیدواژه ها:
نویسندگان
Ayham Darwich
Faculty of Biomedical Engineering, Al-Andalus University for Medical Sciences, Tartous, Syria- Faculty of Technical Engineering, University of Tartous, Tartous, Syria
Abeer Aljareh
Faculty of Dentistry, Damascus University, Damascus, Syria
Omar Aladel
Faculty of Mechanical Engineering and Informatics, University of Miskolc, Miskolc, Hungary
Szabolcs Szávai
Faculty of Mechanical Engineering and Informatics, University of Miskolc, Miskolc, Hungary