1
|
Espinoza-Montero PJ, Montero-Jiménez M, Fernández L, Paz JL, Piñeiros JL, Ceballos SM. In vitro wearing away of orthodontic brackets and wires in different conditions: A review. Heliyon 2022; 8:e10560. [PMID: 36325428 PMCID: PMC9621092 DOI: 10.1016/j.heliyon.2022.e10560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/04/2021] [Accepted: 09/01/2022] [Indexed: 11/14/2022] Open
Abstract
Introduction The release of metallic ions from orthodontic
brackets and wires typically depends on their quality (chemical composition) and
the medium to which they are exposed, e.g., acidic, alkaline, substances with a
high fluoride concentration, etc. This review examines corrosion and wear of
orthodontic brackets, wires, and arches exposed to different media, including:
beverages (juices), mouthwashes and artificial saliva among others, and the
possible health effects resulting from the release of metallic ions under
various conditions. Objective This review aims to determine the exposure
conditions that cause the most wear on orthodontic devices, as well as the
possible health effects that can be caused by the release of metallic ions under
various conditions. Sources A search was carried out in the Scopus database,
for articles related to oral media that can corrode brackets and wires. The
initial research resulted in 8,127 documents, after applying inclusion and
exclusion criteria, 76 articles remained. Conclusion Stainless steel, which is commonly used in
orthodontic devices, is the material that suffers the most wear. It was also
found that acidic pH, alcohols, fluorides, and chlorides worsen orthodontic
material corrosion. Further, nickel released from brackets and wires can cause
allergic reactions and gingival overgrowth into patients.
Collapse
|
2
|
Ajami S, Dadras S, Faghih Z, Shobeiri SS, Mahdian A. In Vitro evaluation of immediate cytotoxicity of resterilised orthodontic bands on HGF-1 cell line. Int Orthod 2021; 19:500-504. [PMID: 34016572 DOI: 10.1016/j.ortho.2021.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/24/2021] [Accepted: 04/24/2021] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the immediate cytotoxic effects of orthodontic molar bands, on HGF-1 cell line, after multiple times of sterilization following size selection procedure. MATERIAL AND METHODS 48 stainless steel orthodontic molar bands were divided into 4 groups according to times of sterilization (1, 2, 4 and 8 times). A liquid extract containing the ions released from each band was prepared and the HGF-1 cell line was exposed to the extracts. 2 control groups (positive and negative) were designated. An MTT assay was performed, and the absorbance was read at 492nm in a microplate reader (Antos 2020, Austria). RESULTS There was no significant difference in pure optical density (OD) among the 4 groups (P=0.749) however a statistically significant difference was seen between the positive control group and other 4 groups (P<0.001). CONCLUSION The stainless-steel orthodontic bands used in this study were inert as manufactured and even multiple times of sterilization did not decrease the biocompatibility of these bands for clinical use. The present study shows that clinicians can sterilize the tried-in molar bands for at least 8 times without any risk of cytotoxicity for patients.
Collapse
Affiliation(s)
- Shabnam Ajami
- Orthodontic Research Centre, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeideh Dadras
- Orthodontic Research Centre, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Faghih
- Cancer Immunology Group, Shiraz Institute of Cancer Research, School of medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeideh Sadat Shobeiri
- Cellular and Molecular Research center, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Arezoo Mahdian
- Orthodontic Research Centre, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
| |
Collapse
|
3
|
Meneses IHCD, Sampaio GADM, Carvalho FGD, Carlo HL, Münchow EA, Pithon MM, Alves PM, Lacerda-Santos R. In Vivo Biocompatibility, Mechanical, and Antibacterial Properties of Cements Modified with Propolis in Different Concentrations. Eur J Dent 2020; 14:77-84. [PMID: 32168534 PMCID: PMC7079564 DOI: 10.1055/s-0040-1702255] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Objectives
The focus of this triple-blind randomized study was to evaluate the mechanical properties, antibacterial effect, and
in vivo
biocompatibility of glass ionomer cements (GICs) modified with ethanolic extracts of propolis (EEP).
Materials and Methods
For biocompatibility tests, 135 male Wistar rats were used and divided into nine groups: Group C (control, polyethylene), Groups M, M10, M25, M50 (Meron; conventional, and modified with 10%, 25%, 50% EEP, respectively), Groups KC, KC10, KC25, KC50 (Ketac Cem; conventional, and modified with 10%, 25%, 50% EEP, respectively). The tissues were analyzed under an optical microscope for different cellular events in different time intervals. Shear bond strength test (SBST) on cementation of metal matrices (
n
= 10, per group), adhesive remnant index (ARI) in bovine incisors (
n
= 10, per group), and antibacterial properties by the agar diffusion test (
n
= 15, per group) were analyzed.
Statistical Analysis
Data were analyzed by Kruskal–Wallis test followed by Dunn, and one-way analysis of variance test followed by Tukey’s test (
p
< 0.5).
Results
Morphological evaluation demonstrated intense inflammatory infiltrate in Groups M10 and KC10 in the time intervals of 7 (
p
= 0.001) and 15 (
p
= 0.006) days. Multinucleated giant cells were shown to be more present in Group M1, with statistical difference from Control and KC50 Groups in the time interval of 7 days (
p
= 0.033). The SBST showed no statistical significance among the groups (
p
> 0.05). Antibacterial property showed a statistically significant difference between Meron and Meron 50%-EEP Groups, and between Ketac and Ketac 50%-EPP Groups (
p
= 0.001).
Conclusions
The intensity of histological changes resulting from the cements was shown to be inversely proportional to the concentration of propolis added; Ketac 50%-EPP was the concentration that had the most favorable biocompatibility results. Addition of EEP to GIC did not negatively change the SBST and ARI. Antibacterial property demonstrated a concentration-dependent effect.
Collapse
Affiliation(s)
| | - Gêisa Aiane de Morais Sampaio
- Department of Clinical and Social Dentistry, Dental School, Federal University of Paraíba, João Pessoa, Paraíba, Brazil
| | - Fabiola Galbiatti de Carvalho
- Department of Orthodontics and Pediatric Dentistry, Dental School, Federal University of Juiz de Fora, Governador Valadares, Minas Gerais, Brazil
| | - Hugo Lemes Carlo
- Department of Restorative Dentistry, Dental School, Federal University of Juiz de Fora, Governador Valadares, Minas Gerais, Brazil
| | - Eliseu Aldrighi Münchow
- Department of Restorative Dentistry, Dental School, Federal University of Juiz de Fora, Governador Valadares, Minas Gerais, Brazil
| | - Matheus Melo Pithon
- Department of Orthodontics, Dental School, Federal University of Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil.,Department of Orthodontics, State University of the Southwest of Bahia, Jéquie, Bahia, Brazil
| | - Polliana Muniz Alves
- Department of Pathology, Dental School, State University of Paraíba, Campina Grande, Paraíba, Brazil
| | - Rogério Lacerda-Santos
- Department of Orthodontics, Dental School, Federal University of Rio de Janeiro, Cidade Universitária, Rio de Janeiro, Brazil.,Department of Orthodontics and Pediatric Dentistry, Dental School, Federal University of Juiz de Fora, Governador Valadares, Minas Gerais, Brazil
| |
Collapse
|