Dental implant and abutment in PEEK: stress assessment in single crown retainers on anterior region

• Published in: Clinical oral investigations 2024-05, Vol.28 (6), p.336, Article 336
• Main Authors: de Almeida, Marcus Vinicius Rocha, Ribeiro, Michele Costa Oliveira, dos Reis-Neta, Gilda Rocha, Vargas-Moreno, Vanessa Felipe, Gomes, Rafael Soares, da Silva, Wander José, Del Bel Cury, Altair Antoninha, Marcello-Machado, Raissa Micaella
• Format: Article
• Language: English
• Subjects: Benzophenones; Bone implants; Cancellous bone; Carbon Fiber - chemistry; Cortical Bone; Crowns; Dental Abutments; Dental crowns; Dental Implant-Abutment Design; Dental implants; Dental Implants, Single-Tooth; Dental Materials - chemistry; Dental Prosthesis Design; Dental prosthetics; Dental Stress Analysis; Dentistry; Finite Element Analysis; Glass - chemistry; Humans; Incisor; Ketones - chemistry; Materials Testing; Medicine; Medullary bone; Polyethylene Glycols - chemistry; Polymers; Titanium - chemistry; Zirconia; Zirconium - chemistry
• ISSN: 1436-3771; 1432-6981; 1436-3771
• DOI: 10.1007/s00784-024-05722-2

Objective Stress distribution assessment by finite elements analysis in poly(etheretherketone) (PEEK) implant and abutment as retainers of single crowns in the anterior region. Materials and methods Five 3D models were created, varying implant/abutment manufacturing materials: titanium (Ti), zirconia (Zr), pure PEEK (PEEKp), carbon fiber-reinforced PEEK (PEEKc), glass fiber-reinforced PEEK (PEEKg). A 50 N load was applied 30 o off-axis at the incisal edge of the upper central incisor. The Von Mises stress (σvM) was evaluated on abutment, implant/screw, and minimum principal stress (σmin) and maximum shear stress (τmax) for cortical and cancellous bone. Results The abutment σvM lowest stress was observed in PEEKp group, being 70% lower than Ti and 74% than Zr. On the implant, PEEKp reduced 68% compared to Ti and a 71% to Zr. In the abutment screws, an increase of at least 33% was found in PEEKc compared to Ti, and of at least 81% to Zr. For cortical bone, the highest τmax values were in the PEEKp group, and a slight increase in stress was observed compared to all PEEK groups with Ti and Zr. For σmin, the highest stress was found in the PEEKc. Stress increased at least 7% in cancellous bone for all PEEK groups. Conclusion Abutments and implants made by PEEKc concentrate less σvM stress, transmitting greater stress to the cortical and medullary bone. Clinical relevance The best stress distribution in PEEKc components may contribute to decreased stress shielding; in vitro and in vivo research is recommended to investigate this.