Biomechanical and Morphological Changes Produced by Ionizing Radiation on Bone Tissue Surrounding Dental Implant

Overview

Journal J Appl Oral Sci

Specialty Dentistry

Date 2020 Sep 30

PMID 32997090

Citations 5

Authors

Priscilla Barbosa Ferreira Soares

Carlos Jose Soares

Pedro Henrique Justino Oliveira Limirio

Vitor Carvalho Lara

Camilla Christian Gomes Moura

Darceny Zanetta-Barbosa

Affiliations

Soon will be listed here.

Abstract

Objective: This study analyzed the effect of ionizing radiation on bone microarchitecture and biomechanical properties in the bone tissue surrounding a dental implant.

Methodology: Twenty rabbits received three dental morse taper junction implants: one in the left tibia and two in the right tibia. The animals were randomized into two groups: the nonirradiated group (control group) and the irradiated group, which received 30 Gy in a single dose 2 weeks after the implant procedure. Four weeks after the implant procedure, the animals were sacrificed, and the implant/bone specimens were used for each experiment. The specimens (n=10) of the right tibia were examined by microcomputed tomography to measure the cortical volume (CtV, mm3), cortical thickness (CtTh, mm) and porosity (CtPo, %). The other specimens (n=10) were examined by dynamic indentation to measure the elastic modulus (E, GPa) and Vickers hardness (VHN, N/mm2) in the bone. The specimens of the left tibia (n=10) were subjected to pull-out tests to calculate the failure load (N), displacement (mm) up to the failure point and interface stiffness (N/mm). In the irradiated group, two measurements were performed: close, at 1 mm surrounding the implant surface, and distant, at 2.5 mm from the external limit of the first measurement. Data were analyzed using one-way ANOVA, Tukey's test and Student's t-test (α=0.05).

Results: The irradiated bone closer to the implant surface had lower elastic modulus (E), Vickers hardness (VHN), Ct.Th, and Ct.V values and a higher Ct.Po value than the bone distant to the implant (P<0.04). The irradiated bone that was distant from the implant surface had lower E, VHN, and Ct.Th values and a higher Ct.Po value than the nonirradiated bone (P<0.04). The nonirradiated bone had higher failure loads, displacements and stiffness values than the irradiated bone (P<0.02).

Conclusion: Ionizing radiation in dental implants resulted in negative effects on the microarchitecture and biomechanical properties of bone tissue, mainly near the surface of the implant.

Citing Articles

Effects of different doses of ionizing radiation on alveolar bone repair in post-extraction tooth socket: an experimental study in rats.

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Radioiodine-131 Therapy Used for Differentiated Thyroid Cancer Can Impair Titanium Dental Implants: An In Vitro Analysis.

Piciu D, Bran S, Moldovan M, Varvara S, Piciu A, Cuc S Cancers (Basel). 2023; 15(9).

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Definition of the Region of Interest for the Assessment of Alveolar Bone Repair Using Micro-computed Tomography.

Borges J, Costa V, Irie M, Barbosa G, Spin-Neto R, Soares P J Digit Imaging. 2022; 36(1):356-364.

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Characterizations of alveolar repair after mandibular second molar extraction: an experimental study in rats.

Li J, Sheng Z, Sun J, Wang R, Yu X J Appl Oral Sci. 2022; 30:e20220010.

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Outcome of implants placed to retain craniofacial prostheses - A retrospective cohort study with a follow-up of up to 30 years.

Alberga J, Eggels I, Visser A, van Minnen B, Korfage A, Vissink A Clin Implant Dent Relat Res. 2022; 24(5):643-654.

PMID: 35699941 PMC: 9796566. DOI: 10.1111/cid.13106.

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