1
|
Areid N, Riivari S, Abushahba F, Shahramian K, Närhi T. Influence of Surface Characteristics of TiO 2 Coatings on the Response of Gingival Cells: A Systematic Review of In Vitro Studies. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2533. [PMID: 36984413 PMCID: PMC10056999 DOI: 10.3390/ma16062533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/16/2023] [Accepted: 03/20/2023] [Indexed: 06/18/2023]
Abstract
The soft tissue-implant interface requires the formation of epithelium and connective tissue seal to hinder microbial infiltration and prevent epithelial down growth. Nanoporous titanium dioxide (TiO2) surface coatings have shown good potential for promoting soft tissue attachment to implant surfaces. However, the impact of their surface properties on the biological response of gingival cells needs further investigation. This systematic review aimed to investigate the cellular behavior of gingival cells on TiO2-implant abutment coatings based on in vitro studies. The review was performed to answer the question: "How does the surface characteristic of TiO2 coatings influence the gingival cell response in in vitro studies?". A search in MEDLINE/PubMed and the web of science databases from 1990 to 2022 was performed using keywords. A quality assessment of the studies selected was performed using the SciRAP method. A total of 11 publications were selected from the 289 studies that fulfilled the inclusion criteria. The mean reporting and methodologic quality SciRAP scores were 82.7 ± 6.4/100 and 87 ± 4.2/100, respectively. Within the limitations of this in vitro systematic review, it can be concluded that the TiO2 coatings with smooth nano-structured surface topography and good wettability improve gingival cell response compared to non-coated surfaces.
Collapse
Affiliation(s)
- Nagat Areid
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland
| | - Sini Riivari
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland
| | - Faleh Abushahba
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland
| | - Khalil Shahramian
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland
- Turku Clinical Biomaterials Center (TCBC), University of Turku, FI-20014 Turku, Finland
| | - Timo Närhi
- Department of Prosthetic Dentistry and Stomatognathic Physiology, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland
- Turku Clinical Biomaterials Center (TCBC), University of Turku, FI-20014 Turku, Finland
- Oral Health Care, Wellbeing services county of Southwest Finland, P.O. Box 52, FIN-20521 Turku, Finland
| |
Collapse
|
2
|
Scarano A, Postiglione F, Khater AGA, Al-Hamed FS, Lorusso F. A Novel Technique to Increase the Thickness of TiO₂ of Dental Implants by Nd: DPSS Q-sw Laser Treatment. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13184178. [PMID: 32962189 PMCID: PMC7560357 DOI: 10.3390/ma13184178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/13/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
High bone-implant contact is a crucial factor in the achievement of osseointegration and long time clinical success of dental implants. Micro, nano, microtopography, and oxide layer of dental implants influence tissue response. The lasers were used for achieving an implant surface with homogeneous micro texturing and uncontaminated surface. The present study aimed to characterize the implant surfaces treated by Nd: DPSS Q-sw Laser treatment compared to machined implants. A total of 10 machined implants and 10 lasered surface implants were evaluated in this study. The implant surfaces were evaluated by X-ray Photoelectron Spectroscopy (XPS), Auger Electron Spectroscopy (AES), and metallography to characterize and measure the thickness of the oxide layer on the implant titanium surface. The machined surfaces showed a non-homogeneous oxide layer ranging between 20 and 30 nm. The lasered implant surfaces showed a homogeneous oxide layer ranging between 400 nm and 460 nm in the area of the laser holes, while outside the layer, thickness ranged between 200 nm and 400 nm without microcracks or evidence of damage. Another exciting result after this laser treatment is a topographically controlled, repeatable, homogeneous, and clean surface. This technique can obtain the implant surface without leaving residues of foreign substances on it. The study results indicate that the use of Nd: DPSS Q-sw laser produces a predictable and reproducible treatment able to improve the titanium oxide layer on the dental implant surface.
Collapse
Affiliation(s)
- Antonio Scarano
- Department of Medical, Oral and Biotechnological Sciences and CeSi-MeT, University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy;
| | - Francesca Postiglione
- Department of Medical, Oral and Biotechnological Sciences and CasT, University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy;
| | - Ahmad G. A. Khater
- Faculty of Oral and Dental Medicine, Ahram Canadian University, Giza 12511, Egypt;
| | | | - Felice Lorusso
- Department of Medical, Oral and Biotechnological Sciences and CeSi-MeT, University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy;
| |
Collapse
|
3
|
Titanium surface modifications and their soft-tissue interface on nonkeratinized soft tissues-A systematic review (Review). Biointerphases 2019; 14:040802. [PMID: 31419910 DOI: 10.1116/1.5113607] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022] Open
Abstract
In this systematic review, the authors explored the surface aspects of various titanium (Ti) or Ti alloy medical implants, examining the interface formed between the implant and surrounding nonkeratinized soft tissues (periosteum, muscles, tendons, fat, cicatrix, or dura mater). A comprehensive search undertaken in July 2019 used strict keywords in relevant electronic databases to identify relevant studies. Based on the authors' inclusion criteria (restricted to in vivo studies), 19 of 651 publications qualified, all pertaining to animal models. The syrcle's risk of bias tool for animal studies was applied at study level. Given the broad nature of the reported results and the many different parameters measured, the articles under scrutiny were assigned to five research subgroups according to their surface modification types: mechanical surface modifications, oxidative processes (e.g., acid etching, anodization, microarc oxidation), sol-gel derived titania (TiO2) coatings, biofunctionalized surfaces, and a subgroup for other modifications. The primary outcome was a liquid space at the interface (e.g., seroma formation) that was reported in six studies. Machining Ti implants to a roughness between Ra = 0.5 and 1.0 μm was shown to induce soft-tissue adhesion. Smoother surfaces, with the exception of acid polished and anodized Ti (Ra = 0.2 μm), prevented soft-tissue adhesion. A fibroblast growth factor 2 apatite composite coating promoted soft-tissue attachment via Sharpey-like fibers. In theory, this implant-soft tissue interface could be nearly perfect.
Collapse
|
4
|
Influence of the Thermal Treatment to Address a Better Osseointegration of Ti6Al4V Dental Implants: Histological and Histomorphometrical Study in a Rabbit Model. BIOMED RESEARCH INTERNATIONAL 2018; 2018:2349698. [PMID: 30050922 PMCID: PMC6040305 DOI: 10.1155/2018/2349698] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 05/29/2018] [Indexed: 12/27/2022]
Abstract
Background Pure titanium continues to be the first choice for dental implants and represents the gold standard for their biocompatibility and physical and mechanical characteristics, while the titanium alloy (Ti6Al4V) has good mechanical properties. The surface structure of the titanium oxide layer formation on the surface influences and improves the bone response around dental implants. Purpose The purpose of this study is to evaluate the influence of a thermal treatment of Ti6Al4V implant surfaces and the bone healing response in a rabbit model. Methods Altogether sixteen implants with same design were inserted into the distal femoral metaphysis. A screw (13 mm long, 4 mm in diameter) was inserted in an implant bed. Each rabbit received two implants, one in the left femur and one in the right femur. The samples were histologically and histomorphometrically evaluated at 8 weeks. Results A statistically significant difference (p = 0.000034) was present histologically in the percentages of bone-implant contact (BIC) between the test group (BIC = 69.25±4.49%.) and control group (BIC = 56.25 ± 4.8%) by one-way analysis of variance (ANOVA). Significance was set at p ≤ 0.05. Conclusions The outcome of the present study indicates a novel approach to improving bone healing around titanium implants.
Collapse
|
5
|
Liang J, Song R, Huang Q, Yang Y, Lin L, Zhang Y, Jiang P, Duan H, Dong X, Lin C. Electrochemical construction of a bio-inspired micro/nano-textured structure with cell-sized microhole arrays on biomedical titanium to enhance bioactivity. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.06.100] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
6
|
Oral O, Lassila LV, Kumbuloglu O, Vallittu PK. Bioactive glass particulate filler composite: Effect of coupling of fillers and filler loading on some physical properties. Dent Mater 2014; 30:570-7. [PMID: 24655591 DOI: 10.1016/j.dental.2014.02.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 02/20/2014] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the effect of silanization of biostable and bioactive glass fillers in a polymer matrix on some of the physical properties of the composite. METHODS The water absorption, solubility, flexural strength, flexural modulus and toughness of different particulate filler composite resins were studied in vitro. Five different specimen groups were analyzed: A glass-free control, a non-silanized bioactive glass, a silanized bioactive glass, a non-silanized biostable glass and a silanized biostable glass groups. All of these five groups were further divided into sub-groups of dry and water-stored materials, both of them containing groups with 3wt%, 6wt%, 9wt% or 12wt% of glass particles (n=8 per group). The silanization of the glass particles was carried out with 2% of gamma-3-methacryloxyproyltrimethoxysilane (MPS). For the water absorption and solubility tests, the test specimens were stored in water for 60 days, and the percentages of weight change were statistically analyzed. Flexural strength, flexural modulus and toughness values were tested with a three-point bending test and statistically analyzed. RESULTS Higher solubility values were observed in non-silanized glass in proportion to the percentage of glass particles. Silanization, on the other hand, decreased the solubility values of both types of glass particles and polymer. While 12wt% non-silanized bioactive glass specimens showed -0.98wt% solubility, 12wt% silanized biostable glass specimens were observed to have only -0.34wt% solubility. The three-point bending results of the dry specimens showed that flexural strength, toughness and flexural modulus decreased in proportion to the increase of glass fillers. The control group presented the highest results (106.6MPa for flexural strength, 335.7kPA for toughness, 3.23GPa for flexural modulus), whereas for flexural strength and toughness, 12wt% of non-silanized biostable glass filler groups presented the lowest (70.3MPa for flexural strength, 111.5kPa for toughness). For flexural modulus on the other hand, 12wt% of silanized biostable glass filler group gave the lowest results (2.57GPa). SIGNIFICANCE The silanization of glass fillers improved the properties of the glass as well as the properties of the composite. Silanization of bioactive glass may protect the glass from leaching at early stage of water storage.
Collapse
Affiliation(s)
- Onur Oral
- Department of Biomaterials Science & Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20014 Turku, Finland.
| | - Lippo V Lassila
- Department of Biomaterials Science & Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20014 Turku, Finland
| | - Ovul Kumbuloglu
- Department of Prosthodontics, Faculty of Dentistry, Ege University, Izmir, Turkey
| | - Pekka K Vallittu
- Department of Biomaterials Science & Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20014 Turku, Finland
| |
Collapse
|
7
|
McCafferty MM, Burke GA, Meenan BJ. Mesenchymal stem cell response to conformal sputter deposited calcium phosphate thin films on nanostructured titanium surfaces. J Biomed Mater Res A 2013; 102:3585-97. [PMID: 24249697 DOI: 10.1002/jbm.a.35018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/10/2013] [Accepted: 10/30/2013] [Indexed: 01/27/2023]
Abstract
Biomaterial surfaces that can directly induce the osteogenic differentiation of mesenchymal stem cells (MSCs) present an exciting strategy for bone tissue engineering and offers significant benefits for improving the repair or replacement of damaged or lost bone tissue. In this study, titanium nanostructures with distinctive topographical features were produced by radio frequency magnetron sputtering. The response of MSCs to the nanostructured titanium (Ti) surfaces before and after augmentation by a sputter deposited calcium phosphate (CaP) coating has been investigated. The sputtered CaP has the characteristics of a calcium enriched hydroxyapatite surface layer, as determined by X-ray photoelectron spectroscopy and X-ray diffraction studies. The sputter deposited Ti has a polycrystalline surface morphology, as confirmed by atomic force microscopy, and CaP layers deposited thereon (TiCaP) conform to this topography. The effects of these surfaces on MSC focal adhesion formation, actin cytoskeleton organization and Runx2 gene expression were examined. The Ti and TiCaP surfaces were found to promote changes in MSC morphology and adhesion known to be associated with subsequent downstream osteogenic differentiation; however, the equivalent events were not as pronounced on the CaP surface. A significant increase in Runx2 expression was observed for CaP compared to Ti, but no such difference was seen between either Ti and TiCaP, nor CaP and TiCaP. Importantly, the Ti surface engendered the expected contribution of nanoscale features to the MSC response; moreover, the CaP layer when used in combination with this topography has been found to cause no adverse effects in respect of MSC behavior.
Collapse
Affiliation(s)
- Mura M McCafferty
- Nanotechnology and Integrated Bioengineering Centre (NIBEC) School of Engineering, University of Ulster, Newtownabbey, BT37 0QB, Northern Ireland
| | | | | |
Collapse
|
8
|
Jiang P, Lin L, Zhang F, Dong X, Ren L, Lin C. Electrochemical construction of micro–nano spongelike structure on titanium substrate for enhancing corrosion resistance and bioactivity. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.120] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
9
|
Solovyev AA, Ovchinnikov DV, Korostelev EV, Markeev AM. Correlation between structural and bioactive properties of titanium dioxide formed by atomic layer deposition. ACTA ACUST UNITED AC 2013. [DOI: 10.1134/s1995078013030178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Moritz N, Linderbäck P, Närhi T. Bioactive Ceramic Coatings for Metallic Implants. Tissue Eng Regen Med 2012. [DOI: 10.1201/b13049-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
11
|
Ballo AM, Bjöörn D, Astrand M, Palmquist A, Lausmaa J, Thomsen P. Bone response to physical-vapour-deposited titanium dioxide coatings on titanium implants. Clin Oral Implants Res 2012; 24:1009-17. [PMID: 22697421 DOI: 10.1111/j.1600-0501.2012.02509.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the correlation between coating thickness and the crystal structure of physical-vapour-deposited (PVD) titanium dioxide coatings, and to evaluate their in vivo biocompatibility. MATERIALS AND METHODS The PVD TiO 2 coatings of different thickness were deposited on machined titanium grade 2 screw-shaped implants. Non-coated titanium implants were used as controls. Coating properties such as thickness, crystal structure, coating morphology and roughness were characterized. Forty-eight implants were placed randomly into both tibias of 16 rats. The animals were euthanized 7 and 28 days postsurgery and block biopsies were prepared for histology, histomorphometry and SEM analysis. RESULTS The thicknesses of the PVDTiO 2 coatings were 120 and 1430 nm respectively. Histologically, new bone formed on all implant surfaces. The mean percentage of newly formed bone in contact with the implant (BIC) was significantly higher at early healing time (7 days) for the 120 nm thick PVD coating (39 ± 14%) than for both the 1430 nm thick PVD coating (22 ± 10%) (P = 0.043) and the machined surface (22 ± 9%) (P = 0.028). This difference was no longer evident after 28 days (P = 0.867). CONCLUSION Bone formation and bone-to-implant contact are achieved to the same degree for TiO 2 surface modifications prepared by a PVD process as clinically used, machined titanium. Furthermore, a relatively thinner PVD coating promotes a higher degree of bone apposition shortly after implantation, thereby providing rationales for exploring the potential clinical use of these modifications.
Collapse
Affiliation(s)
- Ahmed M Ballo
- Department of Biomaterials, Institute for Clinical Sciences, The Sahlgrenska Academy at the University of Gothenburg, Goteborg, Sweden.
| | | | | | | | | | | |
Collapse
|
12
|
Hang R, Huang X, Tian L, He Z, Tang B. Preparation, characterization, corrosion behavior and bioactivity of Ni2O3-doped TiO2 nanotubes on NiTi alloy. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.03.085] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
13
|
Dhayal M, Kapoor R, Sistla PG, Kant C, Pandey RR, Govind, Saini KK, Pande G. Growth, differentiation, and migration of osteoblasts on transparent Ni doped TiO2 thin films deposited on borosilicate glass. J Biomed Mater Res A 2012; 100:1168-78. [DOI: 10.1002/jbm.a.34061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 10/20/2011] [Accepted: 12/05/2011] [Indexed: 11/08/2022]
|
14
|
Närhi TO, Leminen H, Haukioja A, Söderling E. Adhesion ofAggregatibacter actinomycetemcomitansandFusobacterium nucleatumon bioactive TiO2surfaces. Clin Oral Implants Res 2012; 24:45-9. [DOI: 10.1111/j.1600-0501.2011.02399.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2011] [Indexed: 11/27/2022]
Affiliation(s)
| | - Heidi Leminen
- Clinic of Oral Diseases; Turku University Central Hospital; Turku; Finland
| | - Anna Haukioja
- Institute of Dentistry; University of Turku; Turku; Finland and National Institute of Health and Welfare, Helsinki, Finland
| | | |
Collapse
|
15
|
Meretoja VV, Rossi S, Peltola T, Pelliniemi LJ, Närhi TO. Adhesion and proliferation of human fibroblasts on sol-gel coated titania. J Biomed Mater Res A 2010; 95:269-75. [PMID: 20607871 DOI: 10.1002/jbm.a.32829] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The objective of this study was to evaluate growth and attachment of human gingival fibroblasts on nonresorbable sol-gel-derived nanoporous titania (TiO2) coated discs and noncoated commercially pure titania (cpTi) discs in vitro. The strength of attachment was evaluated using serial trypsinization. The number of cells detached from TiO2-substrates was 30% +/- 3%, whereas those detached from the cpTi was 58% +/- 4% indicating a stronger cell attachment on the coated surfaces. In scanning electron microscopy (SEM) images fewer cells, with more rounded shape, were seen with cpTi than with TiO2 after the detachment assay. Fibroblasts grew more efficiently on TiO2 than on cpTi substrates, showing significantly higher cell activities at all times. In transmission electron microscopy (TEM), a continuous layer of two to three cells thick covered the coated and noncoated discs after 7 days of culture. The plasma membrane of cells in contact with the coating was in close opposition and the cytoplasm was ultrastructurally similar to the cells grown on noncoated discs with well-preserved organelles. In conclusion, we demonstrated that the sol-gel-derived TiO2 coatings can facilitate cell growth and attachment of human gingival fibroblasts on titanium in vitro. This in vitro study is in line with our previous in vivo observations of improved soft tissue attachment of TiO2 coatings in comparison with cpTi.
Collapse
Affiliation(s)
- V V Meretoja
- Department of Prosthetic Dentistry and Biomaterials Science, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20520 Turku, Finland
| | | | | | | | | |
Collapse
|
16
|
Linderbäck P, Areva S, Aspenberg P, Tengvall P. Sol-gel derived titania coating with immobilized bisphosphonate enhances screw fixation in rat tibia. J Biomed Mater Res A 2010; 94:389-95. [PMID: 20186735 DOI: 10.1002/jbm.a.32708] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A variety of surface modifications have been tested for the enhancement of screw fixation in bone, and locally delivered anti-osteoporosis drugs such as bisphosphonates (BP) are then of interest. In this in vivo study, the impact of surface immobilized BP was compared with systemic BP delivery and screws with no BP. After due in vitro characterization, differently treated stainless steel (SS) screws were divided into four groups with 10 rats each. Three of the groups received screws coated with sol-gel derived TiO(2) and calcium phosphate (SS+TiO(2)+CaP). One of these had no further treatment, one had alendronate (BP) adsorbed to calcium phosphate mineral, and one received systemic BP treatment. The fourth group received uncoated SS screws and no BP (control). The screw pullout force was measured after 4 weeks of implantation in rat tibiae. The immobilized amount and release rate of alendronate could be controlled by different immersion times. The SS+TiO(2)+CaP coating did not increase the pullout force compared to SS alone. Surface delivered alendronate enhanced the pullout force by 93% [p = 0.000; 95% Confidence Interval (CI): 67-118%] compared to SS, and by 39% (p = 0.044; 95% CI: 7-71%) compared to systemic alendronate delivery. Both surface immobilized and systemically delivered alendronate improved implant fixation. Also, locally delivered, that is, surface immobilized alendronate showed a better fixation than systemically delivered. Using sol-gel derived TiO(2) as a platform, it is possible to administer controllable amounts of a variety of BPs.
Collapse
Affiliation(s)
- Paula Linderbäck
- Department of Physics, Chemistry and Biology, Laboratory of Applied Physics, Linköping University, SE-581 83 Linköping, Sweden.
| | | | | | | |
Collapse
|
17
|
Barbour ME, Gandhi N, el-Turki A, O'Sullivan DJ, Jagger DC. Differential adhesion of Streptococcus gordonii to anatase and rutile titanium dioxide surfaces with and without functionalization with chlorhexidine. J Biomed Mater Res A 2009; 90:993-8. [PMID: 18655136 DOI: 10.1002/jbm.a.32170] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The majority of dental implants are composed primarily of titanium and have an outer layer of titanium dioxide. Crystalline titanium dioxide most commonly exists in one of the two structures, anatase and rutile, and both of these have been observed on commercially available dental implants. Early implant failure can be associated with postoperative infection due to implant contamination during or immediately after surgery. The impetus of this study was to investigate whether functionalization of anatase and rutile titanium dioxide surfaces with chlorhexidine-reduced subsequent colonization of the surface by Streptococcus gordonii. Exposure to 100 mg x L(-1) chlorhexidine for 60 s resulted in a fivefold reduction in S. gordonii coverage on anatase and a twofold reduction on rutile. This may be related to a preferential adsorption of chlorhexidine to anatase compared with rutile. The reduction in bacterial coverage was not due to desorption of chlorhexidine into solution. More bacteria were observed on anatase than rutile surfaces without chlorhexidine functionalization, indicating that crystal structure may have a significant effect on bacterial colonization. In conclusion, functionalization with chlorhexidine reduced bacterial coverage on titanium dioxide surfaces, and anatase surfaces may be more amenable to such treatment than rutile.
Collapse
Affiliation(s)
- Michele E Barbour
- Department of Oral and Dental Science, University of Bristol, BS1 2LY, United Kingdom.
| | | | | | | | | |
Collapse
|
18
|
Rossi S, Tirri T, Paldan H, Kuntsi-Vaattovaara H, Tulamo R, Närhi T. Peri-implant tissue response to TiO2 surface modified implants. Clin Oral Implants Res 2008; 19:348-55. [PMID: 18261120 DOI: 10.1111/j.1600-0501.2007.01478.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The objective of this study was to evaluate peri-implant soft tissue attachment and alveolar bone height on nanoporous TiO(2) thin film on commercial titanium dental implants compared with unmodified standard implants. MATERIAL AND METHODS In six adult beagle dogs, the mandibular premolars P2-P4 were extracted bilaterally. Sol-gel-derived nanoporous TiO(2) thin film was produced on smooth coronal part of standard ITI Straumann implants (4.1 mm x 8.0 mm) by dip coating method. After 3 months healing period of the extraction sockets modified (n=24) and unmodified (n=11) control implants were placed bilaterally. The animals were killed after 8 weeks and the samples were retrieved and processed for histologic/histomorfometric and TEM/SEM evaluations. RESULTS Histological examination showed mild or absent inflammatory reaction in peri-implant connective tissues around the surface modified implants. Further, junctional epithelium (JE)/connective tissue (CT) appeared to be in immediate contact with the experimental implants. Of the experimental implants, 22% were judged to be detached from the implant surface while 45% of the untreated control implants were detached. Dense plaques of hemidesmosomes were found in TEM evaluation of the JE cell membrane facing the surface-treated implants. In the histomorfometric analysis, the distance between the implant margin and alveolar bone crest was significantly shorter in surface-treated implants than in the control implants (P<0.02). CONCLUSION Nanoporous sol-gel-derived TiO(2) thin film on ITI Straumann dental implants improved soft tissue attachment in vivo.
Collapse
Affiliation(s)
- Sami Rossi
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Finland
| | | | | | | | | | | |
Collapse
|