Author:
Lin Chunping,Hu Hongcheng,Zhu Junxin,Wu Yuwei,Rong Qiguo,Tang Zhihui
Abstract
Abstract
Background
Stress concentration may cause bone resorption even lead to the failure of implantation. This study was designed to investigate whether a certain sagittal root position could cause stress concentration around maxillary anterior custom-made root-analogue implants via three-dimensional finite element analysis.
Methods
The von Mises stresses in the bone around implants in different groups were compared by finite element analysis. Six models were constructed and divided into two groups through Geomagic Studio 2012 software. The smooth group included models of unthreaded custom-made implants in Class I, II or III sagittal root positions. The threaded group included models of reverse buttress-threaded implants in the three positions. The von Mises stress distributions and the range of the stresses under vertical and oblique loads of 100 N were analyzed through ANSYS 16.0 software.
Results
Stress concentrations around the labial lamella area were more prominent in the Class I position than in the Class II and Class III positions under oblique loading. Under vertical loading, the most obvious stress concentration areas were the labial lamella and palatal apical areas in the Class I and Class III positions, respectively. Stress was relatively distributed in the labial and palatal lamellae in the Class II position. The maximum von Mises stresses in the bone around the custom-made root-analogue implants in this study were lower than around traditional implants reported in the literature. The maximum von Mises stresses in this study were all less than 25 MPa in cortical bone and less than 6 MPa in cancellous bone. Additionally, compared to the smooth group, the threaded group showed lower von Mises stress concentration in the bone around the implants.
Conclusions
The sagittal root position affected the von Mises stress distribution around custom-made root-analogue implants. There was no certain sagittal root position that could cause excessive stress concentration around the custom-made root-analogue implants. Among the three sagittal root positions, the Class II position would be the most appropriate site for custom-made root-analogue implants.
Funder
the National Key Research and Development Program of China
Publisher
Springer Science and Business Media LLC
Reference38 articles.
1. Saeidi Pour R, Freitas Rafael C, Engler M, Edelhoff D, Klaus G, Prandtner O, Berthold M, Liebermann A. Historical development of root analogue implants: a review of published papers. Br J Oral Maxillofac Surg. 2019;57(6):496–504.
2. Hodosh M, Povar M, Shklar G. The dental polymer implant concept. J Prosthet Dent. 1969;22(3):371–80.
3. Lundgren D, Rylander H, Andersson M, Johansson C, Albrektsson T. Healing-in of root analogue titanium implants placed in extraction sockets. An experimental study in the beagle dog. Clin Oral Implants Res. 1992;3(3):136–43.
4. Figliuzzi M, Giudice A, Rengo C, Fortunato L. A direct metal laser sintering (DMLS) root analogue implant placed in the anterior maxilla. Case report. Ann Ital Chir 2019, 8.
5. Mangano FG, De Franco M, Caprioglio A, Macchi A, Piattelli A, Mangano C. Immediate, non-submerged, root-analogue direct laser metal sintering (DLMS) implants: a 1-year prospective study on 15 patients. Lasers Med Sci. 2014;29(4):1321–8.
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