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Aboelmahasen MMF, Othman SS, Dena ASA, Zhran M, Ma M, El-Destawy MT, Bilal AM. Histomorphometric and CBCT comparison of osseointegration around orthodontic titanium miniscrews coated with different nanoparticles: An in-vivo animal study. Int Orthod 2024; 22:100823. [PMID: 37992473 DOI: 10.1016/j.ortho.2023.100823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 10/16/2023] [Accepted: 10/22/2023] [Indexed: 11/24/2023]
Abstract
BACKGROUND Temporarily installed titanium orthodontic miniscrews are usually used for many orthodontic applications, especially those cases that need high force, such as skeletally anchored orthodontic appliance cases. Surface modification of titanium miniscrews has proved success in preventing failure and overcoming their limitations. OBJECTIVE The present study aims at the assessment of the quality of osseointegration of surface modified titanium miniscrews installed in the maxilla of albino rabbits with cone-beam computed tomography (CBCT) imaging as well as histomorphometric investigations. MATERIAL AND METHODS The orthodontic titanium miniscrews (TMSs) were coated with silver/hydroxyapatite (Ag/HA) nanoparticles (NPs) or zinc oxide (ZnO) NPs via electrochemical deposition. The coating nanomaterials were then characterized with X-ray diffractometry (XRD) and scanning electron microscopy (SEM) imaging. Moreover, the antimicrobial activity of the coated titanium miniscrews were evaluated in the rabbits' oral cavity to investigate their ability to prevent biofilm formation. RESULTS It was found that the Ag/HA-coated TMSs demonstrated the highest antimicrobial activity and bone area fill, followed by the ZnO NPs-coated TMSs when compared to their uncoated counterparts. In the anterior area surrounding the installed TMSs, the highest osseointegration was demonstrated by ZnO NPs-coated TMSs. However, Ag/HA-coated TMSs showed the highest osseointegration values in the posterior peri-implant area. CONCLUSIONS Ag/HA- and ZnO NPs-coated TMSs may provide a promising solution to overcome the 30% probable failure in temporarily installed orthodontic miniscrews, as they can enhance the osseointegration process and prevent biofilm formation.
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Affiliation(s)
| | - Samer Salim Othman
- Department of Clinical Dental Sciences, College of Dentistry, Ibnsina University of Medical and Pharmaceutical Sciences, Baghdad, Iraq
| | - Ahmed S Abo Dena
- Pharmaceutical Chemistry Department, National Organization for Drug Control and Research (NODCAR), Giza, Egypt; Faculty of Oral and Dental Medicine, Future University in Egypt (FUE), New Cairo, Egypt
| | - Monira Zhran
- Botany and Microbiology Department, Faculty of Science (Girls Branch), Al-Azhar University, Cairo, Egypt
| | - Mohamed Ma
- Oral pathology Department, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt
| | - Mahmoud Taha El-Destawy
- Oral medicine Department, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt
| | - Ahmed Mohamed Bilal
- Oral medicine Department, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt
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Lee YT, Liou EJW, Chen SW. Comparison between microporous and nanoporous orthodontic miniscrews : An experimental study in rabbits. J Orofac Orthop 2024; 85:1-12. [PMID: 35593908 DOI: 10.1007/s00056-022-00398-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 03/02/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Surface characteristics of orthodontic miniscrews might affect survival rates and removal torque values (RTVs). This experimental study aimed to clarify whether and why a microporous or nanoporous surface promotes higher survival rates and RTVs for orthodontic miniscrews. METHODS Using a split-leg design, one set each of nonporous (sham control, n = 24) and microporous (control, n = 6), and three sets of nanoporous (experimental, n = 6 per set) miniscrews were implanted in the tibias of 12 New Zealand rabbits and immediately loaded with 1.5 N nickel-titanium coil springs for 12 weeks. The surface morphology, micropores, and nanotube diameters of the miniscrews were examined using scanning electron microscopy and field-emission scanning electron microscopy. The surface composition and thickness were determined using Auger electron spectroscopy. The survival rates and RTVs of each set were assessed. RESULTS The nanoporous miniscrews had higher survival rates, RTVs (p < 0.001), and thicker nanotube oxide thicknesses (p < 0.001) than the nonporous and microporous miniscrews. The nonporous and microporous miniscrews had no nanotube structures. The surface oxide composition was titanium dioxide (TiO2). The threshold RTV, TiO2 thickness, and nanotube diameter of nanoporous miniscrews needed to promote the experimental survival rate to 100% was determined to be 6.6 ± 0.8 N-cm (p < 0.05), 22.5 ± 4.8 nm (p < 0.05), and 17.6 ± 2.3 nm or above, respectively. CONCLUSION Nanoporous surfaces promoted higher survival rates and RTVs than microporous miniscrews. This could be due to TiO2 nanotube structures with thicker oxide layers in nanoporous miniscrews.
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Affiliation(s)
- Yueh-Tse Lee
- Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan
- Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
- Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Linkou, 5, Fusing St., Gueishan District, Taoyuan, 333, Taiwan
| | - Eric Jein-Wein Liou
- Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan.
- Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.
- Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, 199, Tung-Hwa North Rd., Taipei, 105, Taiwan.
| | - Sinn-Wen Chen
- Department of Chemical Engineering, National Tsing Hua University, #101, Sec. 2, Kuang-Fu Rd., Hsin-Chu, 300, Taiwan
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Kitajima H, Hirota M, Iwai T, Mitsudo K, Saruta J, Ogawa T. Synergistic Enhancement of Protein Recruitment and Retention via Implant Surface Microtopography and Superhydrophilicity in a Computational Fluid Dynamics Model. Int J Mol Sci 2023; 24:15618. [PMID: 37958605 PMCID: PMC10649348 DOI: 10.3390/ijms242115618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/12/2023] [Accepted: 10/19/2023] [Indexed: 11/15/2023] Open
Abstract
The exact mechanisms by which implant surface properties govern osseointegration are incompletely understood. To gain insights into this process, we examined alterations in protein and blood recruitment around screw implants with different surface topographies and wettability using a computational fluid dynamics (CFD) model. Compared with a smooth surface, a microrough implant surface reduced protein infiltration from the outer zone to the implant thread and interface zones by over two-fold. However, the microrough implant surface slowed blood flow in the interface zone by four-fold. As a result, compared with the smooth surface, the microrough surface doubled the protein recruitment/retention index, defined as the mass of proteins present in the area per unit time. Converting implant surfaces from hydrophobic to superhydrophilic increased the mass of protein infiltration 2-3 times and slowed down blood flow by up to two-fold in the implant vicinity for both smooth and microrough surfaces. The protein recruitment/retention index was highest at the implant interface when the implant surface was superhydrophilic and microrough. Thus, this study demonstrates distinct control of the mass and speed of protein and blood flow through implant surface topography, wettability, and their combination, significantly altering the efficiency of protein recruitment. Although microrough surfaces showed both positive and negative impacts on protein recruitment over smooth surfaces, superhydrophilicity was consistently positive regardless of surface topography.
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Affiliation(s)
- Hiroaki Kitajima
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (H.K.); (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan; (T.I.); (K.M.)
| | - Makoto Hirota
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (H.K.); (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, 4-57 Urafune-cho, Minami-ku, Yokohama 232-0024, Kanagawa, Japan
| | - Toshinori Iwai
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan; (T.I.); (K.M.)
| | - Kenji Mitsudo
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Kanagawa, Japan; (T.I.); (K.M.)
| | - Juri Saruta
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (H.K.); (M.H.); (J.S.)
- Department of Education Planning, School of Dentistry, Kanagawa Dental University, 82 Inaoka, Yokosuka 238-8580, Kanagawa, Japan
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (H.K.); (M.H.); (J.S.)
- Division of Regenerative and Reconstructive Sciences, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
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Gezer P, Yilanci H. Comparison of mechanical stability of mini-screws with resorbable blasting media and micro-arc oxidation surface treatments under orthodontic forces: An in vitro biomechanical study. Int Orthod 2023; 21:100775. [PMID: 37263049 DOI: 10.1016/j.ortho.2023.100775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 05/03/2023] [Accepted: 05/09/2023] [Indexed: 06/03/2023]
Abstract
INTRODUCTION The aim of this study was to compare the primary stability of mini-screws with different surface treatments such as resorbable blasting media (RBM) and micro-arc oxidation (MAO) under in vitro orthodontic forces. MATERIAL AND METHODS Thirty-six self-drilling TiAl6V4-ELI grade 23 titanium alloy 1.6×8mm mini-screws were inserted into polyurethane foam blocks and divided into three groups according to surface properties: machine surface (MS), RBM-treated, and MAO-treated. An orthodontic force of 150g was applied to the mini-screws using NiTi coils. Maximum insertion torque (MIT) and maximum removal torque (MRT) were measured with a digital torque screwdriver during insertion and removal. For each mini-screw, stability measurements were made with the Periotest M device at day 0 and weeks 1, 2, 4, 8, and 12. RESULTS Significant differences in MIT were observed between all groups in pairwise comparisons (P<0.001) with the highest value in the MAO-treated group and the lowest in the MS group. The mean MRT values differed in all three groups (P=0.001). In pairwise comparisons of MRT, only the difference between MS group and RBM-treated group was significant. The highest value was observed in the RBM-treated group, while the lowest value was observed in the MS group. Periotest values were significantly higher in the MAO-treated group than the RBM-treated group at weeks 8 and 12. A positive significant correlation was found between MIT and MRT in all groups. No significant correlation was found between MIT, MRT and Periotest values in all groups. CONCLUSION RBM-treated group was significantly higher than the MS group in MIT and MRT values. According to Periotest values, RBM-treated group was found to be significantly more stable than the MAO-treated group at weeks 8 and 12. Therefore, RBM surface treatment was found to be more favourable than other surfaces to increase success rate in clinical applications.
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Affiliation(s)
- Pınar Gezer
- Department of Orthodontics, Faculty of Dentistry, Institute of Health Sciences, Istanbul Medipol University, Istanbul, Turkey.
| | - Hilal Yilanci
- Department of Orthodontics, Faculty of Dentistry, Institute of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
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Ravi J, Duraisamy S, Rajaram K, Kannan R, Arumugam E. Survival rate and stability of surface-treated and non-surface-treated orthodontic mini-implants: a randomized clinical trial. Dental Press J Orthod 2023; 28:e2321345. [PMID: 37283426 DOI: 10.1590/2177-6709.28.2.e2321345.oar] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 03/28/2022] [Indexed: 06/08/2023] Open
Abstract
OBJECTIVES This clinical trial was conducted to evaluate the stability and failure rate of surface-treated orthodontic mini-implants and determine whether they differ from those of non-surface-treated orthodontic mini-implants. TRIAL DESIGN Randomized clinical trial with a split-mouth study design. SETTING Department of Orthodontics, SRM Dental College, Chennai. PARTICIPANTS Patients who required orthodontic mini-implants for anterior retraction in both arches. METHODS Self-drilling, tapered, titanium orthodontic mini-implants with and without surface treatment were placed in each patient following a split-mouth design. The maximum insertion and removal torques were measured for each implant using a digital torque driver. The failure rates were calculated for each type of mini-implant. RESULTS The mean maximum insertion torque was 17.9 ± 5.6 Ncm for surface-treated mini-implants and 16.4 ± 9.0 Ncm for non-surface-treated mini-implants. The mean maximum removal torque was 8.1 ± 2.9 Ncm for surface-treated mini-implants and 3.3 ± 1.9 Ncm for non-surface-treated mini-implants. Among the failed implants, 71.4% were non-surface-treated mini-implants and 28.6% were surface-treated mini-implants. CONCLUSION The insertion torque and failure rate did not differ significantly between the groups, whereas the removal torque was significantly higher in the surface-treated group. Thus, surface treatment using sandblasting and acid etching may improve the secondary stability of self-drilling orthodontic mini-implants. TRIAL REGISTRATION The trial was registered in the Clinical Trials Registry, India (ICMR NIMS). Registration number: CTRI/2019/10/021718.
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Affiliation(s)
- Janani Ravi
- SRM Dental College, Department of Orthodontics and Dentofacial Orthopaedics (Ramapuram, Chennai, Tamil Nadu, India)
| | - Sangeetha Duraisamy
- SRM Dental College, Department of Orthodontics and Dentofacial Orthopaedics (Ramapuram, Chennai, Tamil Nadu, India)
| | - Krishnaraj Rajaram
- SRM Dental College, Department of Orthodontics and Dentofacial Orthopaedics (Ramapuram, Chennai, Tamil Nadu, India)
| | - Ravi Kannan
- SRM Dental College, Department of Orthodontics and Dentofacial Orthopaedics (Ramapuram, Chennai, Tamil Nadu, India)
| | - Edeinton Arumugam
- SRM Dental College, Department of Orthodontics and Dentofacial Orthopaedics (Ramapuram, Chennai, Tamil Nadu, India)
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Li Y, Chen R, Wang F, Cai X, Wang Y. Antimicrobial peptide GL13K immobilized onto SLA-treated titanium by silanization: antibacterial effect against methicillin-resistant Staphylococcus aureus (MRSA). RSC Adv 2022; 12:6918-6929. [PMID: 35424597 PMCID: PMC8981691 DOI: 10.1039/d1ra04974g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 02/22/2022] [Indexed: 02/03/2023] Open
Abstract
Infection is the main reason for implant failure, and the incidence of drug-resistant bacterial infection has increased in recent years. Further, methicillin-resistant Staphylococcus aureus (MRSA)-related implant infection has become a serious worldwide threat. New strategies, other than antibiotics, to tackle drug-resistance, are of high clinical significance. Antimicrobial peptides show clear superiority over conventional antibiotics in inhibiting drug-resistant bacteria. In the present study, we combined the antimicrobial peptide, GL13K, with sandblasting and acid-etching (SLA)-treated titanium using a silane coupling agent. Field emission scanning electron microscopy images showed the morphology of the coating. Attenuated total reflectance Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results confirmed loading of GL13K, and the hydrophilicity of the SLA-GL13K coating was evaluated by water contact angle analysis. The releasing study of samples showed that the coating has a sustained releasing profile. SLA-GL13K coating exhibited strong contact- and release-killing abilities against MRSA, E. coli, and S. aureus. Meanwhile, Cell Counting Kit 8 analysis and examination of cell morphology demonstrated that the SLA-GL13K coating had good cytocompatibility at antibacterial concentrations. Overall, all these results suggest that SLA-GL13K coating can be successfully fabricated using silanization, and is a promising candidate for controlling MRSA-induced implant-related infection.
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Affiliation(s)
- Yusang Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University Wuhan China
| | - Ruiying Chen
- Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, Department of Implant Dentistry Shanghai China
| | - Fushi Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University Wuhan China
- Hospital of Stomatology Wuhan University, Department of Cariology and Endodontics Wuhan China
| | - Xinjie Cai
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University Wuhan China
- Hospital of Stomatology Wuhan University, Department of Prosthodontics Wuhan China
| | - Yining Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University Wuhan China
- Hospital of Stomatology Wuhan University, Department of Prosthodontics Wuhan China
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Al-Thomali Y, Basha S, Mohamed RN. Effect of surface treatment on the mechanical stability of orthodontic miniscrews. Angle Orthod 2021; 92:127-136. [PMID: 34338745 DOI: 10.2319/020721-111.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/01/2021] [Indexed: 12/09/2022] Open
Abstract
OBJECTIVES To provide collective quantitative evidence about the effect of surface treatments on the mechanical stability of orthodontic miniscrews (MSs). MATERIALS AND METHODS The study was registered in PROSPERO (No. CRD42020209652). The research question was defined according to the PICO (population, intervention, control, and outcomes) format. Various research databases were searched for animal and human studies on effects of surface treatment on the mechanical stability of MSs. Both prospective and retrospective in vivo clinical studies published in English were included. The risk of bias was assessed using SYRCLE's risk of bias tool for animal studies. The meta-analysis was conducted using RevMan 5.4. RESULTS A total of 109 articles were identified; 14 were included in the systematic review, and seven studies with sandblasting, acid etching (SLA) methods of surface treatment were included for meta-analysis. The number of study participants ranged from 6 to 24 (total n = 185), with a mean of 13.2. A total of 949 MSs were used with a mean of 67.8. The overall success rate for surface-treated MSs ranged from 47.9% to 100%. Forest plot of removal torque values showed significantly higher values for SLA surface-treated MSs compared with controls with a standard mean difference of 2.61 (95% confidence interval = 1.49-3.72, I2 = 85%). Forest plot of insertion torque showed a standard mean difference of -6.19 (95% confidence interval = -13.63-1.25, I2 = 98%, P = .10). CONCLUSIONS Surface treatment of MSs improved primary and secondary stability with good osseointegration at the bone-implant surface. However, significant heterogeneity across the studies included in the meta-analysis made it difficult to draw conclusions.
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Doi K, Kobatake R, Makihara Y, Oki Y, Umehara H, Kubo T, Tsuga K. The development of novel bioactive porous titanium as a bone reconstruction material. RSC Adv 2020; 10:22684-22690. [PMID: 35514562 PMCID: PMC9054584 DOI: 10.1039/d0ra03202f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
Porous titanium fabricated by the resin-impregnated titanium substitute technique has good mechanical strength and osteoconduction. The alkali treatment of the titanium surface creates a bioactive surface. Alkali-treated porous titanium is expected to accelerate bone formation. The purpose of this study was to evaluate the bone reconstruction ability of alkali-treated porous titanium. Porous titanium (85% porosity) was treated with an alkali solution (5 N NaOH, 24 h). To assess material properties, we analyzed the surface structure by scanning electron microscopy (SEM) and mechanical strength testing. To assess bioactivity, each sample was soaked in a simulated body fluid (Hank's solution) for 7 days. Surface observations, weight change ratio measurement (after/before being soaked in Hank's solution) and surface elemental analysis were performed. We also designed an in vivo study with rabbit femurs. After 2 and 3 weeks of implantation, histological observations and histomorphometric bone formation ratio analysis were performed. All data were statistically analyzed using a Student's t-test (P < 0.05) (this study was approved by the Hiroshima University animal experiment ethics committee: A11-5-5). Non-treated porous titanium (control) appeared to have a smooth surface and the alkali-treated porous titanium (ATPT) had a nano-sized needle-like rough surface. ATPT had similar mechanical strength to that of the control. After soaking into the Hank's solution, we observed apatite-like crystals in the SEM image, weight gain, and high Ca and P contents in ATPT. There was significant bone formation at an early stage in ATPT compared with that in control. It was suggested that the alkali-treated porous titanium had a bioactive surface and induced bone reconstruction effectively. This novel bioactive porous titanium can be expected to be a good bone reconstruction material. Porous titanium fabricated by the resin-impregnated titanium substitute technique has good mechanical strength and osteoconduction.![]()
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Affiliation(s)
- Kazuya Doi
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Reiko Kobatake
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Yusuke Makihara
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Yoshifumi Oki
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Hanako Umehara
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Takayasu Kubo
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics
- Hiroshima University Graduate School of Biomedical and Health Sciences
- Hiroshima 734-8553
- Japan
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Oga Y, Tomonari H, Kwon S, Kuninori T, Yagi T, Miyawaki S. Evaluation of miniscrew stability using an automatic embedding auxiliary skeletal anchorage device. Angle Orthod 2018; 89:47-53. [PMID: 30203984 DOI: 10.2319/121117-857.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To clarify the in vivo effect of an automatic embedding device on miniscrew stability. MATERIALS AND METHODS 42 miniscrews were implanted into rabbit femurs. The miniscrews with the novel auxiliary device formed the auxiliary group (n = 11 at 4 weeks; n = 11 at 8 weeks) and the miniscrews without the auxiliary device formed the nonauxiliary control group (n = 9 at 4 weeks; n = 11 at 8 weeks). Cortical bone thickness, distance from the cortical bone surface to the miniscrew head, and implantation depth of the spike were measured using micro-computed tomography. The mechanical retention force was evaluated by measuring the displacement of the miniscrew head after it was loaded perpendicular to its long axis. In the lateral displacement test, effects of the auxiliary (with vs without auxiliary), and time (4 vs 8 weeks) were assessed using the Brunner-Langer nonparametric analysis of longitudinal data in factorial experiments. RESULTS The mean implantation depth of the spike in the auxiliary group at 4 and 8 weeks was 0.28 mm (median: 0.33; SD: 0.12) and 0.37 mm (median: 0.33; SD: 0.19), respectively. The retention force was approximately 2.0 to 2.8 and 1.6 to 1.8 times greater in the auxiliary group than in the nonauxiliary group at 4 and 8 weeks, respectively. CONCLUSIONS The auxiliary device improved the mechanical retention force without the need to increase miniscrew length or diameter. This may enable the safe use of miniscrews in difficult areas.
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Histological and Bone Morphometric Evaluation of Osseointegration Aspects by Alkali Hydrothermally-Treated Implants. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8040635] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Lin TH, Hu HT, Wang HC, Wu MC, Wu SW, Yeh ML. Evaluation of osseous integration of titanium orthopedic screws with novel SLA treatment in porcine model. PLoS One 2017; 12:e0188364. [PMID: 29149204 PMCID: PMC5693293 DOI: 10.1371/journal.pone.0188364] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 10/24/2017] [Indexed: 01/31/2023] Open
Abstract
The success of many endosseous implants in orthopaedic and dental applications depends on the surface characteristics, as they affect osseous integration. Previous investigations indicated that a novel large-grit sand-blasted and acid-etched (SLA) titanium (denoted as SLAffinity-Ti) implant had better bone integration than that of a comparably shaped implant with a plasma-sprayed titanium surface. The purpose of the present investigation was to create a SLAffinity surface on pedicle screws and trauma screws and to compare it with the surfaces of a sand-blasted-only implant and commercial implants in terms of bone integration. The cortical bone and spine of twelve minipigs were implanted with 3 and 4 implants, respectively, and the bone integration was evaluated using micro-computed tomography (micro-CT), mechanical tests (pull-out strength and stripping torque), and histological analysis (toluidine blue and hematoxylin and eosin staining) one and three months after implantation. The micro-CT images showed that the gap between the bone and implant was consistently higher in the sand-blasted-only and commercial groups compared to that in the SLAffinity group 1 and 3 months after implantation. Moreover, the bone volume of implant inserted into bone and the percentage of implant inside bone tissue were greater in the SLAffinity screws 1 and 3 months after implantation, as compared to the sand-blasted and commercial screws. In the mechanical tests, the removal torque and pull-out strength (p < 0.05) were higher in the SLAffinity group at 1 and 3 months. The histological results were consistent with mechanical testing, showing that the SLAffinity group had the most mineralized matrix, the most bone formation around the screws, and the most bone cells in bone tissue. These findings indicate that a SLAffinity surface can effectively enhance the holding strength and integration of pedicle screws and cortical screws, promoting early healing and improving outcomes, compared to sand-blasted-only and commercial implants.
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Affiliation(s)
- Tzu-Hsiang Lin
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Hsin-Tai Hu
- Department of Technology Development, Hung Chun Bio-Science Company, Kaohsiung Science Park, Luzhu, Kaohsiung, Taiwan
| | - Hsueh-Chun Wang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Meng-Chian Wu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Shu-Wei Wu
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Long Yeh
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
- Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan
- * E-mail:
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12
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Effect of surface alkali-based treatment of titanium implants on ability to promote in vitro mineralization and in vivo bone formation. Acta Biomater 2017; 57:511-523. [PMID: 28499630 DOI: 10.1016/j.actbio.2017.05.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 12/29/2022]
Abstract
This study investigated whether a novel alkali-based surface modification enhances in vitro mineralization as well as in vivo bone formation around titanium (Ti) implants in a femoral condyle model of 36 male Wister rats. All implant surfaces were grit-blasted and then received either acid-etching treatment, alkali-based treatment, or were left untreated (controls). Histological and histomorphometrical analyses were performed on retrieved specimens after 4 and 8weeks of healing to assess peri-implant bone formation. Results of implants surface characterisation showed notable differences in the topography and composition of alkali-treated surfaces, reflecting the formation of submicron-structured alkali-titanate layer. In the in vitro test, alkali-treated Ti surfaces showed the ability to stimulate mineralization upon soaking in simulated body fluid (SBF). In vivo histomorphometrical analyses showed similar values for bone area (BA%) and bone-to-implant contact (BIC%) for all experimental groups after both 4- and 8-week implantation periods. In conclusion, the surface topography and composition of the grit-blasted Ti implants was significantly modified using alkali-based treatment. With respect to the present in vivo model, the biological performance of alkali-treated Ti implants is comparable to the commercially available, grit-blasted, acid-etched Ti implants. STATEMENT OF SIGNIFICANCE Since success rate of dental implants might be challenged in bone of low density, an optimum implant surface characteristic is demanding. In this work, alkali treatment of Ti implants showed significant advantage of surface mineralization upon soaking in simulated body fluid. Using an in vivo rat model, Ti surfaces with either acid-etching treatment or alkali-based treatment evoked robust bone formation around Ti implants. Such information may be utilized for the advancement of biomaterials research for bone implants in future.
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Yun SD, Choi SH, Cha JY, Yu HS, Kim KM, Kim J, Hwang CJ. Effects of recycling on the biomechanical characteristics of retrieved orthodontic miniscrews. Korean J Orthod 2017; 47:238-247. [PMID: 28670565 PMCID: PMC5466906 DOI: 10.4041/kjod.2017.47.4.238] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/30/2016] [Indexed: 11/10/2022] Open
Abstract
Objective The aim of this study was to compare recycled and unused orthodontic miniscrews to determine the feasibility of reuse. The comparisons included both miniscrews with machined surfaces (MS), and those with etched surfaces (ES). Methods Retrieved MS and ES were further divided into three subgroups according to the assigned recycling procedure: group A, air-water spray; group B, mechanical cleaning; and group C, mechanical and chemical cleaning. Unused screws were used as controls. Scanning electron microscopy, energy-dispersive X-ray spectrometry, insertion time and maximum insertion torque measurements in artificial bone, and biological responses in the form of periotest values (PTV), bone–implant contact ratio (BIC), and bone volume ratio (BV) were assessed. Results Morphological changes after recycling mainly occurred at the screw tip, and the cortical bone penetration success rate of recycled screws was lower than that of unused screws. Retrieved ES needed more thorough cleaning than retrieved MS to produce a surface composition similar to that of unused screws. There were no significant differences in PTV or BIC between recycled and unused screws, while the BV of the former was significantly lower than that of the latter (p < 0.05). Conclusions These results indicate that reuse of recycled orthodontic miniscrews may not be feasible from the biomechanical aspect.
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Affiliation(s)
- Soon-Dong Yun
- Department of Orthodontics, The Institute of Cranio-Facial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Sung-Hwan Choi
- Department of Orthodontics, The Institute of Cranio-Facial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Jung-Yul Cha
- Department of Orthodontics, The Institute of Cranio-Facial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Hyung-Seog Yu
- Department of Orthodontics, The Institute of Cranio-Facial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, BK21 PLUS Project, College of Dentistry, Yonsei University, Seoul, Korea
| | - Jin Kim
- Oral Cancer Research Institute, Department of Oral Pathology, College of Dentistry, Yonsei University, Seoul, Korea
| | - Chung-Ju Hwang
- Department of Orthodontics, The Institute of Cranio-Facial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
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Maino BG, Di Blasio A, Spadoni D, Ravanetti F, Galli C, Cacchioli A, Katsaros C, Gandolfini M. The integration of orthodontic miniscrews under mechanical loading: a pre-clinical study in rabbit. Eur J Orthod 2017; 39:519-527. [DOI: 10.1093/ejo/cjw069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Kuhn M, Markic G, Doulis I, Göllner P, Patcas R, Hänggi MP. Effect of different incisor movements on the soft tissue profile measured in reference to a rough-surfaced palatal implant. Am J Orthod Dentofacial Orthop 2016; 149:349-57. [PMID: 26926022 DOI: 10.1016/j.ajodo.2015.08.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 08/01/2015] [Accepted: 08/01/2015] [Indexed: 11/25/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate soft tissue profile changes after a wide range of incisor movements in the anterior and posterior directions in nongrowing patients. Identifying baseline values more prone to substantial soft tissue profile changes was of high interest. METHODS For this retrospective study, 47 pairs of lateral cephalograms of nongrowing white patients were superimposed. The cephalograms were taken with the same palatal implant in situ before and after treatment. To increase the accuracy of the measurements, the palatal implants were used as stable reference structures in close relation to the incisors. RESULTS Horizontal changes of the most anterior point of the maxillary incisor showed a significant correlation to horizontal changes of the upper and lower lips (P <0.001). For every millimeter of horizontal change of the most anterior point of the maxillary central incisor, a change of 0.59 mm at labrale superior can be expected. Also, the angulations of the upper and lower lips were significantly correlated to the most anterior point of the maxillary incisor. Lip retraction was less pronounced in patients with initially thicker lips than in those with thinner lips. CONCLUSIONS The major contributing factors for predicting the soft tissue profile change during orthodontic treatment are the amount of horizontal movement of the most anterior point of the maxillary incisor, the amount of bite opening, and the initial lip thickness. Although there are significant correlations between dental movements and soft tissue changes in larger samples, predictions for individuals may be inconsistent.
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Affiliation(s)
- Mirjam Kuhn
- Resident, Clinic of Orthodontics and Paediatric Dentistry, Centre of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Goran Markic
- Attending physician, Clinic of Orthodontics and Paediatric Dentistry, Centre of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Ioannis Doulis
- Attending physician, Department of Orthodontics and Dentofacial Orthopedics, 251 Hellenic Air Force General Hospital, Athens, Greece
| | | | - Raphael Patcas
- Senior lecturer, Clinic of Orthodontics and Paediatric Dentistry, Centre of Dental Medicine, University of Zurich, Zurich, Switzerland
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Romanos GE, Delgado-Ruiz RA, Sacks D, Calvo-Guirado JL. Influence of the implant diameter and bone quality on the primary stability of porous tantalum trabecular metal dental implants: an in vitro biomechanical study. Clin Oral Implants Res 2016; 29:649-655. [PMID: 26916451 DOI: 10.1111/clr.12792] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the primary, initial stability of Porous Tantalum Trabecular Metal™ implants (TM) compared with Tapered Screw Vent® implants (TSV) with different diameters, inserted in two bone densities. METHODS A total of 160 implants (80 TM and 80 TSV) with narrow (3.7 mm) and conventional (4.1 mm) diameters and the same length (10 mm) were placed in artificial bone blocks representing bone qualities II and IV. The implant stability was evaluated by insertion torque (IT) and Resonance Frequency Analysis. Statistical analysis was performed with non-parametric Kruskal-Wallis test with Dunn post-test for the differences between groups. RESULTS The results showed higher ISQ values in dense bone compared with soft bone for all the groups (P < 0.05). Conventional-diameter implants (TSV and TM) showed higher ISQ and IT values compared with narrow implants (TSV and TM) in dense and soft bone (P < 0.05). Tapered TSV implants showed higher stability in soft bone compared with TM implants (P < 0.05). In dense bone, differences were not observed between narrow TSV 3.7 mm and TM 3.7 mm implants (P > 0.05). CONCLUSIONS Within the limitations of this study, it can be concluded: In dense bone blocks, the wider diameter implants are more stable than narrow implants. In soft bone blocks, the tapered TSV implants are more stable than TM implants.
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Affiliation(s)
- Georgios E Romanos
- Department of Periodontology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Rafael Arcesio Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Danielle Sacks
- School of Dental Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Josè Luis Calvo-Guirado
- Department of International Dentistry Research, Faculty of Medicine and Dentistry, San Antonio Catholic University of Murcia (UCAM), Murcia, Spain
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Sirisa-Ard A, Woodroffe Michael SN, Ahmed K, Dunstan CR, Pearce SG, Bilgin AA, Dalci O, Darendeliler MA. Histomorphological and torque removal comparison of 6 mm orthodontic miniscrews with and without surface treatment in New Zealand rabbits. Eur J Orthod 2015; 37:578-83. [PMID: 25608834 DOI: 10.1093/ejo/cju077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AIM The purpose of this study was to assess the difference of removal torque values (RTV) and the bone-to-implant contact (BIC) between the sand-blasted, large grit, and acid-etched (SLA) surface-treated and the machined surface (MA) miniscrews. MATERIAL AND METHODS Miniscrews used in this study were 6mm long with a diameter of 1.5mm. A total of 23 SLA miniscrews and 24 MA miniscrews were placed into the distal femoral condyle of 24 New Zealand rabbits. Removal torque test and the BIC was histologically evaluated at 0 and 8 weeks. RESULTS There was no statistical difference between the RTV in the MA group versus the SLA group at both 0 and 8 weeks. Comparing 0-8 weeks, there was no significant difference in RTV of the SLA group (P = 0.48), however the change in the MA group was statistically significant (P = 0.006). Histological observation showed a significant decrease in BIC comparing 0 and 8 weeks for the MA group. The BIC ratio at 8 weeks was statistically significantly higher in the SLA group compared to the MA group. CONCLUSION SLA surface preparation does not increase the RTV of miniscrews. Further investigations under loading and a large sample size are required.
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Affiliation(s)
| | | | - Kamal Ahmed
- *Discipline of Orthodontics, Faculty of Dentistry and
| | - Colin R Dunstan
- **Department of Biomedical Engineering, School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, New South Wales
| | - Simon G Pearce
- ***Surgical Research Australia Pty Ltd, North Adelaide, South Australia, and
| | - Ayse Aysin Bilgin
- ****Department of Statistics, Faculty of Science, Macquarie University, Sydney, New South Wales, Australia
| | - Oyku Dalci
- *Discipline of Orthodontics, Faculty of Dentistry and
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Bueno RC, Basting RT. In vitro study of human osteoblast proliferation and morphology on orthodontic mini-implants. Angle Orthod 2014; 85:920-6. [PMID: 25546478 DOI: 10.2319/100714-717.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To evaluate the proliferation and morphology of human osteoblasts cultured on two brands of mini-implants after 24, 48, and 72 hours, in addition to the chemical composition found on their surface. MATERIALS AND METHODS Two brands of mini-implant (Morelli and Neodent) were evaluated; polystyrene was used as a control group (n = 3). Osteoblasts were cultured on the surface of sterilized mini-implants in a CO2 incubator at different time periods (24, 48, and 72 hours). Osteoblast proliferation was quantified by scanning electron microscopy using up to 5000× magnification, and cell morphology was analyzed by a single observer. For the chemical analysis, spectroscopy X-ray fluorescence was used to identify and quantify chemical components on the surface of the mini-implants. RESULTS Two-way ANOVA showed no significant interaction between the factors studied (P = 0.686). A Tukey test revealed no significant difference in osteoblast proliferation between the mini-implants at all studied periods; however, a difference in cell proliferation was detected between the Neodent and the control group (P = .025). For all groups, time had a direct and positive effect on osteoblast proliferation (P < .001). The significant elements present in both brands of mini-implants were titanium, aluminum, vanadium, and iron. CONCLUSIONS Osteoblast proliferation was present on the mini-implants studied, which increased over time; however, no significant difference between brands was observed. No difference was seen between the mini-implants evaluated in terms of chemical composition. Cell adhesion after 72 hours suggests that areas of bone remodeling can be achieved, thus initiating the process of mini-implant anchorage.
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Affiliation(s)
- Ricardo Carvalho Bueno
- a Research Assistant, Department of Dental Materials and Restorative Dentistry, São Leopoldo Mandic School of Dentistry and Research Institute, Campinas, São Paulo, Brazil
| | - Roberta Tarkany Basting
- b Professor and Department Chair, Department of Dental Materials and Restorative Dentistry, São Leopoldo Mandic School of Dentistry and Research Institute, Campinas, São Paulo, Brazil
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Oh EJ, Nguyen TDT, Lee SY, Jeon YM, Bae TS, Kim JG. Enhanced compatibility and initial stability of Ti6Al4V alloy orthodontic miniscrews subjected to anodization, cyclic precalcification, and heat treatment. Korean J Orthod 2014; 44:246-53. [PMID: 25309864 PMCID: PMC4192526 DOI: 10.4041/kjod.2014.44.5.246] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 03/20/2014] [Accepted: 03/25/2014] [Indexed: 11/10/2022] Open
Abstract
Objective To evaluate the bioactivity, and the biomechanical and bone-regenerative properties of Ti6Al4V miniscrews subjected to anodization, cyclic precalcification, and heat treatment (APH treatment) and their potential clinical use. Methods The surfaces of Ti6Al4V alloys were modified by APH treatment. Bioactivity was assessed after immersion in simulated body fluid for 3 days. The hydrophilicity and the roughness of APH-treated surfaces were compared with those of untreated (UT) and anodized and heat-treated (AH) samples. For in vivo tests, 32 miniscrews (16 UT and 16 APH) were inserted into 16 Wistar rats, one UT and one APH-treated miniscrew in either tibia. The miniscrews were extracted after 3 and 6 weeks and their osseointegration (n = 8 for each time point and group) was investigated by surface and histological analyses and removal torque measurements. Results APH treatment formed a dense surface array of nanotubular TiO2 layer covered with a compact apatite-like film. APH-treated samples showed better bioactivity and biocompatibility compared with UT and AH samples. In vivo, APH-treated miniscrews showed higher removal torque and bone-to-implant contact than did UT miniscrews, after both 3 and 6 weeks (p < 0.05). Also, early deposition of densely mineralized bone around APH-treated miniscrews was observed, implying good bonding to the treated surface. Conclusions APH treatment enhanced the bioactivity, and the biomechanical and bone regenerative properties of the Ti6Al4V alloy miniscrews. The enhanced initial stability afforded should be valuable in orthodontic applications.
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Affiliation(s)
| | - Thuy-Duong T Nguyen
- Department of Dental Biomaterials and Institute of Oral Bioscience, Brain Korea 21 Project, School of Dentistry, Chonbuk National University, Jeonju, Korea
| | - Seung-Youp Lee
- Department of Orthodontics, School of Dentistry, Chonbuk National University, Jeonju, Korea
| | - Young-Mi Jeon
- Department of Orthodontics, School of Dentistry, Chonbuk National University, Jeonju, Korea
| | - Tae-Sung Bae
- Department of Dental Biomaterials and Institute of Oral Bioscience, Brain Korea 21 Project, School of Dentistry, Chonbuk National University, Jeonju, Korea
| | - Jong-Gee Kim
- Department of Orthodontics, School of Dentistry, Chonbuk National University, Jeonju, Korea
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Systematic review of mini-implant displacement under orthodontic loading. Int J Oral Sci 2013; 6:1-6. [PMID: 24357855 PMCID: PMC3967307 DOI: 10.1038/ijos.2013.92] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 10/22/2013] [Indexed: 11/17/2022] Open
Abstract
A growing number of studies have reported that mini-implants do not remain in exactly the same position during treatment, although they remain stable. The aim of this review was to collect data regarding primary displacement immediately straight after loading and secondary displacement over time. A systematic review was performed to investigate primary and secondary displacement. The amount and type of displacement were recorded. A total of 27 studies were included. Sixteen in vitro studies or studies using finite element analysis addressed primary displacement, and nine clinical studies and two animal studies addressed secondary displacement. Significant primary displacement was detected (6.4–24.4 µm) for relevant orthodontic forces (0.5–2.5 N). The mean secondary displacement ranged from 0 to 2.7 mm for entire mini-implants. The maximum values for each clinical study ranged from 1.0 to 4.1 mm for the head, 1.0 to 1.5 for the body and 1.0 to 1.92 mm for the tail part. The most frequent type of movement was controlled tipping or bodily movement. Primary displacement did not reach a clinically significant level. However, clinicians can expect relevant secondary displacement in the direction of force. Consequently, decentralized insertion within the inter-radicular space, away from force direction, might be favourable. More evidence is needed to provide quantitative recommendations.
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Manresa C, Bosch M, Manzanares MC, Carvalho P, Echeverría JJ. A new standardized-automatic method for bone-to-implant contact histomorphometric analysis based on backscattered scanning electron microscopy images. Clin Oral Implants Res 2013; 25:702-6. [DOI: 10.1111/clr.12129] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2012] [Indexed: 11/30/2022]
Affiliation(s)
- Carolina Manresa
- Departament d'Odontoestomatologia, Odontologia Integrada d'Adults; Facultat d'Odontologia; Universitat de Barcelona; Barcelona Spain
| | - Manel Bosch
- Unitat de Microscòpia Òptica Avançada; Centres Científics i Tecnològics de la Universitat de Barcelona (CCiTUB); Barcelona Spain
| | - María Cristina Manzanares
- Human Anatomy and Embryology Unit, DPyTEx; Health Universitat de Barcelona Campus (HUBc); Barcelona Spain
| | - Patricia Carvalho
- Human Anatomy and Embryology Unit, DPyTEx; Health Universitat de Barcelona Campus (HUBc); Barcelona Spain
| | - José Javier Echeverría
- Departament d'Odontoestomatologia, Odontologia Integrada d'Adults; Facultat d'Odontologia; Universitat de Barcelona; Barcelona Spain
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Insertion torque and success of orthodontic mini-implants: A systematic review. Am J Orthod Dentofacial Orthop 2012; 142:596-614.e5. [DOI: 10.1016/j.ajodo.2012.06.013] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 06/01/2012] [Accepted: 06/01/2012] [Indexed: 12/26/2022]
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Lescun TB, Baird DK, Oliver LJ, Adams SB, Hawkins JF, Moore GE. Comparison of hydroxyapatite-coated and uncoated pins for transfixation casting in horses. Am J Vet Res 2012; 73:724-34. [DOI: 10.2460/ajvr.73.5.724] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Vignoletti F, Abrahamsson I. Quality of reporting of experimental research in implant dentistry. Critical aspects in design, outcome assessment and model validation. J Clin Periodontol 2012; 39 Suppl 12:6-27. [DOI: 10.1111/j.1600-051x.2011.01830.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fabio Vignoletti
- Department of Periodontology; Faculty of Odontology; Complutense University of Madrid; Madrid; Spain
| | - Ingemar Abrahamsson
- Department of Periodontology; Institute of Odontology; The Sahlgrenska Academy; University of Gothenburg; Gothenburg; Sweden
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Ikeda H, Rossouw PE, Campbell PM, Kontogirogos E, Buschang PH. Three-dimensional analysis of peri-bone–implant contact of rough-surface miniscrew implants. Am J Orthod Dentofacial Orthop 2011; 139:e153-63. [DOI: 10.1016/j.ajodo.2010.09.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 09/01/2010] [Accepted: 09/01/2010] [Indexed: 11/28/2022]
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