The increasing demand for dental implants necessitates the exploration of advanced materials and manufacturing techniques. Three-dimensional (3D) printing has emerged as a viable method for producing custom dental implants, allowing for intricate designs and improved patient-specific fits. This study focuses on the design and structural deformation assessment of 3D-printed dental implants using Finite Element Analysis (FEA). By simulating the mechanical behavior of these implants under realistic loading conditions, we aim to evaluate their performance and predict potential failure points, ultimately enhancing their reliability and longevity in clinical applications.
Objective
The primary objective of this study is to conduct a comprehensive design and structural deformation assessment of three-dimensional (3D) printed dental implants using Finite Element Analysis (FEA). Specifically, the study aims to:
Evaluate stress distribution and deformation patterns in three 3D-printed dental implant designs under simulated physiological loading.
Compare the stiffness, strength, and elastic behavior of PEEK and CFR-PEEK under occlusal forces.
Identify failure points in implants and bone–implant interfaces by analyzing high stress concentrations.
Predict the biomechanical behavior of a novel dental implant by determining its elastic modulus through finite element analysis (FEA).
Methods
Three models 3D were designed to understand stress distribution with different structures using PEEK as biomaterial, with 4 test conditions modeled and compared. An occlusal load was applied (230 N at 90˚ and 30˚) on the implants. Isotropic, linear elastic, and homogeneous were considerate as properties of the components.
Results
Under axial loads, all models stayed within physiological stress limits, while under 30° oblique loading, Model 3 showed the lowest stress, strain, and pressure.
Conclusions
FEA results indicate that 3D-printed dental implants, particularly the optimized Model 3, maintain safe stress levels under axial and oblique loads, supporting their potential for immediate loading. However, due to numerical limitations, experimental validation remains necessary to advance implant designs that optimize bone regeneration and material efficiency.
AlemayehuDBJengYR. Three-dimensional finite element investigation into effects of implant thread design and loading rate on stress distribution in dental implants and anisotropic bone. Materials (Basel).2021; 14: 6974.
2.
LiJJansenJAWalboomersXF,et al.Mechanical aspects of dental implants and osseointegration: a narrative review. J Mech Behav Biomed Mater.2020; 103: 103574.
3.
BruneAStieschMEisenburgerM,et al.The effect of different occlusal contact situations on peri-implant bone stress–A contact finite element analysis of indirect axial loading. Materials Science and Engineering: C2019; 99: 367–373.
4.
FlachMStreckbeinP. Finite element analysis of the bone remodelling process considering bone condensing around osseointegrated dental implants. J Biomech.2006; 39: S454.
5.
GhanemWASadakahAA. Effect of implant length on the stability and osseointegration of immediate implant. Egyptian Journal of Oral & Maxillofacial Surgery2016; 7: 41–48.
6.
AnituaEPiñasLBegoñaL,et al.Long-term retrospective evaluation of short implants in the posterior areas: clinical results after 10–12 years. J Clin Periodontol.2014; 41: 404–411.
7.
FuhLHuangHLChenMYC,et al.Biomechanical investigation of thread designs and interface conditions of zirconia and titanium dental implants with bone: three-dimensional numeric analysis. International Journal of Oral & Maxillofacial Implants2013; 28: e64–e71.
8.
OngJLChanDCN. Hydroxyapatite and their use as coatings in dental implants: a review. Critical Review in Biomedical Engineering2000; 28: 667–707.
9.
KaracanIJacob-MachaIChoiG, et al.Antibiotic containing poly lactic acid/hydroxyapatite biocomposite coatings for dental implant applications. Key Eng Mater.2017; 758: 120–125.
10.
ChenXChenSLiangL, et al.Electrochemical behaviour of EPD synthesized graphene coating on titanium alloys for orthopedic implant application. Procedia CIRP2018; 71: 322–328.
11.
EraslanOInanO. Effect of thread design on stress distribution in a solid screw implant: a 3D finite element analysis. Clin Oral Investig.2010; 14: 411–417.
12.
ShigemitsuRYodaNOgawaT. Biological-data-based finite-element stress analysis of mandibular bone with implant-supported overdenture. Comput Biol Med2014; 54: 44–52. 2014.
13.
SinghalMKAroraVKBaliP, et al.The evaluation of various factors of implant biological width: a mechanical and clinical perspective. Clin Dent.2014; 8: 36–43.
14.
PremnathKSrideviJKalavathyN, et al.Evaluation of stress distribution in bone of different densities using different implant designs: a three-dimensional finite element analysis. J Indian Prosthodont Soc.2013; 13: 555–559.
15.
CelikHKKocSKustarciA,et al.A literature review on the linear elastic material properties assigned in finite element analyses in dental research. Mater Today Commun.2022; 30: 103087.
16.
BroshTPiloRSudaiD. The influence of abutment angulation on strains and stresses along the implant/bone interface: comparison between two experimental techniques. J Prosthet Dent.1998; 79: 328–334.
17.
Giraldo-LondoñoOPaulinoGH. A unified approach for topology optimization with local stress constraints considering various failure criteria: von Mises, Drucker-Prager, Tresca, Mohr-Coulomb, Bresler-Pister and Willam-Warnke. Proc Math Phys Eng Sci.2020; 476: 20190861.
18.
ShenWLChenCSHsuML. Influence of implant collar design on stress and strain distribution in the crestal compact bone: a three-dimensional finite element analysis. Int J Oral Maxillofac Implants2010; 25: 901–910.
19.
YemineniBCMahendraJNasinaJ, et al.Evaluation of maximum principal stress, von Mises stress, and deformation on surrounding mandibular bone during insertion of an implant: a three-dimensional finite element study. Cureus.2020; 12: e9430.
20.
van SteenbergheDKlingeBLindénU, et al.Periodontal indices around natural and titanium abutments: a longitudinal multicenter study. J Periodontol.1993; 64: 538–541.
21.
HolmesDCLoftusJT. Influence of bone quality on stress distribution for endosseous implants. J Oral Implantol.1997; 23: 104–111.
22.
SevimayMTurhanFKiliçarslanMA,et al.Three-dimensional finite element analysis of the effect of different bone quality on stress distribution in an implant-supported crown. J Prosthet Dent2005; 93: 227–234.
23.
LekholmUZarbGAAlbrektssonT. Tissue integrated prosthesis: osseointegration in clinical dentistry. Batavia: Quintessence, 1985, pp. 199–220. 1985.
24.
MischCE. Immediate load applications in implant dentistry. In: Dental implant prosthetics. St. Luis: Elsevier Mosby, 2005, pp.531–567. 2005.
25.
AparicioCRangertBSennerbyL. Immediate/early loading of dental implants: a report from the Sociedad Española de Implantes World Congress consensus meeting in Barcelona, Spain, 2002. Clin Implant Dent Relat Res2002; 5: 57–60. 2003.
26.
GreensteinGCavallaroJ. Managing the buccal gap and plate of bone: immediate dental implant placement. Dent Today2013; 32: 70. 72–7.
27.
ChenSTBuserD. Clinical and esthetic outcomes of implants placed in postextraction sites. Int J Oral Maxillofac Implants2009; 24: 186–217.
28.
BotticelliDBerglundhTLindheJ. Hard–tissue alterations following immediate implant placement in extraction sites. J Clin Periodontol2004; 31: 820–828.
29.
TarnowDPChuSJ. Human histologic verification of osseointegration of an immediate implant placed into a fresh extraction socket with excessive gap distance without primary flap closure, graft, or membrane: a case report. Int J Periodontics Restorative Dent2011; 31: 515–521.
30.
AraújoMGWennströmJLLindheJ. Modeling of the buccal and lingual bone walls of fresh extraction sites following implant installation. Clin Oral Implants Res2006; 17: 606–614.
ZampelisARangertBHeijlL. Tilting of splinted implants for improved prosthodontic support: a two-dimensional finite element analysis. J Prosthet Dent2007; 97: 535–543.
33.
BlackJ. Biological performance of materials: fundamentals of biocompatibility. Boca Ratón: Crc Press, 2005.
34.
ScholesSCUnsworthA. Wear studies on the likely performance of CFR-PEEK/CoCrMo for use as artificial joint bearing materials. J Mater Sci: Mater Med.2009; 20: 163–170.
35.
ArevaloSArthursCMolinaMIE, et al.An overview of the tribological and mechanical properties of PEEK and CFR-PEEK for use in total joint replacements. J Mech Behav Biomed Mater.2023; 145: 105974.
36.
KurtzSM. Chemical and radiation stability of PEEK. In: PEEK Biomaterials handbook. Philadelphia: William Andrew Publishing, 2012, pp.75–79.
37.
DupuisAHoTHFahsA, et al.Improving adhesion of powder coating on PEEK composite: influence of atmospheric plasma parameters. Appl Surf Sci.2015; 357: 1196–1204.
38.
QinWXingTTangB,et al.Mechanical properties and osteogenesis of CFR-PEEK composite with interface strengthening by graphene oxide for implant application. J Mech Behav Biomed Mater.2023; 148: 106222.
39.
Stratton-PowellAAPaskoKMLalS, et al.Biologic responses to polyetheretherketone (PEEK) wear particles. In: PEEK Biomaterials handbook. Philadelphia: William Andrew Publishing, 2019, pp.367–384.
40.
ArevaloSArthursCMolinaMIE, et al.An overview of the tribological and mechanical properties of PEEK and CFR-PEEK for use in total joint replacements. J Mech Behav Biomed Mater.2023; 145: 105974.
41.
MaTZhangJSunS, et al.Current treatment methods to improve the bioactivity and bonding strength of PEEK for dental application: a systematic review. Eur Polym J.2023; 183: 111757.
42.
VertesichKStaatsKBöhlerC, et al.Long term results of a rotating hinge total knee prosthesis with carbon-fiber reinforced poly-ether-ether-ketone (CFR-PEEK) as bearing material. Front Bioeng Biotechnol.2022; 10: 845859.
43.
KurtzSM. Development and clinical performance of PEEK intervertebral cages. In: PEEK biomaterials handbook. Philadelphia: William Andrew Publishing, 2019, pp.263–280.
44.
MuthiahNYolcuYUAlanN, et al.Evolution of polyetheretherketone (PEEK) and titanium interbody devices for spinal procedures: a comprehensive review of the literature. Eur Spine J.2022; 31: 2547–2556.
45.
ChenZChenYDingJ,et al.Blending strategy to modify PEEK-based orthopedic implants. Compos B Eng.2023; 250: 110427.
46.
MaHSuonanAZhouJ, et al.PEEK (Polyether-ether-ketone) and its composite materials in orthopedic implantation. Arabian Journal of Chemistry2021; 14: 102977.
47.
GhermandiRTosiniGLorenziA, et al.Carbon fiber-reinforced PolyEtherEtherKetone (CFR-PEEK) instrumentation in degenerative disease of lumbar spine: a pilot study. Bioengineering2023; 10: 72.
48.
JoergerAKSeitzSLangeN, et al.CFR-PEEK pedicle screw instrumentation for spinal neoplasms: a single center experience on safety and efficacy. Cancers (Basel).2022; 14: 5275.
49.
ZhaoXXiongDLiuY. Improving surface wettability and lubrication of polyetheretherketone (PEEK) by combining with polyvinyl alcohol (PVA) hydrogel. J Mech Behav Biomed Mater.2018; 82: 27–34.
50.
ZhengZLiuPZhangX, et al.Strategies to improve bioactive and antibacterial properties of polyetheretherketone (PEEK) for use as orthopedic implants. Materials Today Bio2022; 16: 100402.
51.
HuangHLiuXWangJ, et al.Strategies to improve the performance of polyetheretherketone (PEEK) as orthopedic implants: from surface modification to addition of bioactive materials. J Mater Chem B.2024; 12: 4533–4552
52.
WangLHeSWuX, et al.Polyetheretherketone/nano-fluorohydroxyapatite composite with antimicrobial activity and osseointegration properties. Biomaterials2014; 35: 6758–6775.
53.
WangCWangSYangY, et al.Bioinspired, biocompatible and peptide-decorated silk fibroin coatings for enhanced osteogenesis of bioinert implant. J Biomater Sci, Polym Ed.2018; 29: 1595–1611.
54.
BaligidadSMAbdullahSRajendranDK,et al.Investigation on fatigue life of HAp and rGO hybrid coating on the PEEK artificial screws for dental implant. Mater Chem Phys.2023; 309: 128381.
55.
HanXYangDYangC, et al.Carbon fiber reinforced PEEK composites based on 3D-printing technology for orthopedic and dental applications. J Clin Med.2019; 8: 240.
56.
JiangHAihemaitiPAiyitiW,et al.Study of the compression behaviours of 3D-printed PEEK/CFR-PEEK sandwich composite structures. Virtual Phys Prototyp.2022; 17: 138–155.
57.
NaganaboyinaHPNagarajuPSonayeSY, et al.In-house processing of carbon fiber-reinforced polyetheretherketone (CFR-PEEK) 3D printable filaments and fused filament fabrication-3D printing of CFR-PEEK parts. The International Journal of Advanced Manufacturing Technology2023; 128: 5011–5024.
58.
BuckELiHCerrutiM. Surface modification strategies to improve the osseointegration of poly (etheretherketone) and its composites. Macromol Biosci.2020; 20: 1900271.
59.
Molinar-DíazJParsonsAJAhmedI, et al.Poly-Ether-Ether-Ketone (PEEK) biomaterials and composites: challenges, progress, and opportunities. Polym Rev.2024; 65: 1–39.
60.
YinWChenMBaiJ, et al.Recent advances in orthopedic polyetheretherketone biomaterials: material fabrication and biofunction establishment. Smart Materials in Medicine2022; 3: 20–36.
61.
OuldyerouAMerdjiAAminallahL, et al.Biomechanical performance of Ti-PEEK dental implants in bone: an in-silico analysis. J Mech Behav Biomed Mater.2022; 134: 105422.
62.
OuldyerouAMerdjiAAminallahL, et al.Biomechanical evaluation of marginal bone loss in the surrounding bone under different loading: 3D finite element analysis study. Int J Multiscale Comput Eng.2022; 20: 43–56.
63.
GengJPMaQSXuW, et al.Finite element analysis of four threat-form configurations in a stepped screw implant. J Oral Rehabil2004; 31: 233–239.
64.
SalehHAvdoshinSDzhonovA. Platform for Tracking Donations of Charitable Foundations Based on Blockchain Technology. Actual Problems of Systems and Software Engineering (APSSE). 2020. 2020.
65.
KhalilIAzizOAsifN.Blockchain and Its Implementation for Charitable Organizations. International Conference on Innovative Computing (ICIC), 2022. 2022.
66.
RezendeCEEChase-DiazMCostaMD, et al.Stress distribution in single dental implant system: three-dimensional finite element analysis based on an in vitro experimental model. Journal of Craniofacial Surgery2015; 26: 2196–2200.
67.
AlemayehuDBJengYR. Three-dimensional finite element investigation into effects of implant thread design and loading rate on stress distribution in dental implants and anisotropic bone. Materials (Basel).2021; 14: 6974.
68.
GuoYChenHTianS, et al.Investigation of the ageing conditions of PEEK powder for the selective laser sintering process. Virtual Phys Prototyp.2023; 18: e2273298.
69.
Rezvani GhomiEEshkalakSKSinghS, et al.Fused filament printing of specialized biomedical devices: a state-of-the art review of technological feasibilities with PEEK. Rapid Prototyp J.2021; 27: 592–616.
