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Orhan ZD, Ciğerim L. Evaluation of Effect of Different Insertion Speeds and Torques on Implant Placement Condition and Removal Torque in Polyurethane Dense D1 Bone Model. Polymers (Basel) 2024; 16:1361. [PMID: 38794554 PMCID: PMC11125928 DOI: 10.3390/polym16101361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 05/05/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
The aim of this study was to evaluate the effect of two different insertion speeds at eight different insertion torque values ranging from 25 to 60 during implantation in a dense polyurethane (PU) D1 bone model on the placement condition and removal torque of dental implants. In this study, 50 pcf single-layer PU plates were used. In the study, a total of 320 implant sockets were divided into two groups, Group 1 (30 rpm) and Group 2 (50 rpm), in terms of insertion speed. Group 1 and Group 2 were divided into eight subgroups with 25, 30, 35, 40, 45, 50, 55 and 60 torques. There were 20 implant sockets in each subgroup. During the implantations, the implant placement condition and removal torque values were assessed. There was a statistically significant difference between the 30 and 50 rpm groups in terms of overall implant placement condition (p < 0.01). It was found that the removal torque values at 50 rpm were statistically significantly higher than those at 30 rpm (p < 0.01). This study showed that in dense D1 bone, the minimum parameters at which all implants could be placed at the bone level were 50 torque at 30 rpm and 40 torque at 50 rpm.
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Affiliation(s)
| | - Levent Ciğerim
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Van Yuzuncu Yil University, Van 65090, Turkey;
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2
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Romero M, Herrero-Climent M, Ríos-Carrasco B, Brizuela A, Romero MM, Gil J. Investigation of the Influence of Roughness and Dental Implant Design on Primary Stability via Analysis of Insertion Torque and Implant Stability Quotient: An In Vitro Study. J Clin Med 2023; 12:4190. [PMID: 37445228 DOI: 10.3390/jcm12134190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/11/2023] [Accepted: 06/16/2023] [Indexed: 07/15/2023] Open
Abstract
In the placement of dental implants, the primary fixation between the dental implant and the bone is of great importance and corresponds to compressive mechanical fixation that aims to prevent micromovement of the implant. The aim of this research was to determine the role of roughness and the type of dental implant (tissue-level or bone-level) in implant stability, measured using resonance frequency analysis (RFA) and insertion torque (IT). We analyzed 234 titanium dental implants, placed in fresh calf ribs, at the half-tissue level and half-bone level. The implant surface was subjected to grit-blasting treatments with alumina particles of 120, 300, and 600 μm at a projection pressure of 2.5 bar, resulting in three types of roughness. Roughness was determined via optical interferometry. The wettability of the surfaces was also determined. Implant stability was measured using a high-precision torquemeter to obtain IT, and RFA was used to determine the implant stability quotient (ISQ). The results show that rough surfaces with Sa values of 0.5 to 4 μm do not affect the primary stability. However, the type of implant is important; bone-level implants obtained the highest primary stability values. A good correlation between the primary stability values obtained via IT and ISQ was demonstrated. New in vivo studies are necessary to know whether these results can be maintained in the long term.
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Affiliation(s)
- Marta Romero
- Department of Periodontology, School of Dentistry, Universidad de Seville, C/Avicena S/N, 41009 Seville, Spain
| | - Mariano Herrero-Climent
- Department of Periodontology, School of Dentistry, Universidad de Seville, C/Avicena S/N, 41009 Seville, Spain
- Porto Dental Institute, Periodontology Department, Symmetrya Prothesis, Av. de Montevideu 810, 4150-518 Porto, Portugal
| | - Blanca Ríos-Carrasco
- Department of Periodontology, School of Dentistry, Universidad de Seville, C/Avicena S/N, 41009 Seville, Spain
| | - Aritza Brizuela
- Densia Reserach Group, Facultad de Ciencias de la Salud, Universidad Europea Miguel de Cervantes, C/del Padre Julio Chevalier 2, 47012 Valladolid, Spain
| | - Manuel María Romero
- Department of Periodontology, School of Dentistry, Universidad de Seville, C/Avicena S/N, 41009 Seville, Spain
| | - Javier Gil
- Bioengineering Institute of Technology, Faculty of Medicine and Health Sciences, Universidad International de Cataluña, C/Josep Trueta s/n, Sant Cugat del Vallés, 08195 Barcelona, Spain
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3
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López-Valverde N, Aragoneses J, López-Valverde A, Rodríguez C, Macedo de Sousa B, Aragoneses JM. Role of chitosan in titanium coatings. trends and new generations of coatings. Front Bioeng Biotechnol 2022; 10:907589. [PMID: 35935477 PMCID: PMC9354072 DOI: 10.3389/fbioe.2022.907589] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 07/04/2022] [Indexed: 01/03/2023] Open
Abstract
Survival studies of dental implants currently reach high figures. However, considering that the recipients are middle-aged individuals with associated pathologies, research is focused on achieving bioactive surfaces that ensure osseointegration. Chitosan is a biocompatible, degradable polysaccharide with antimicrobial and anti-inflammatory properties, capable of inducing increased growth and fixation of osteoblasts around chitosan-coated titanium. Certain chemical modifications to its structure have been shown to enhance its antibacterial activity and osteoinductive properties and it is generally believed that chitosan-coated dental implants may have enhanced osseointegration capabilities and are likely to become a commercial option in the future. Our review provided an overview of the current concepts and theories of osseointegration and current titanium dental implant surfaces and coatings, with a special focus on the in vivo investigation of chitosan-coated implants and a current perspective on the future of titanium dental implant coatings.
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Affiliation(s)
- Nansi López-Valverde
- Department of Medicine and Medical Specialties, Faculty of Health Sciences, Universidad Alcalá de Henares, Madrid, Spain
| | - Javier Aragoneses
- Department of Medicine and Medical Specialties, Faculty of Health Sciences, Universidad Alcalá de Henares, Madrid, Spain
| | - Antonio López-Valverde
- Department of Surgery, University of Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
- *Correspondence: Antonio López-Valverde,
| | - Cinthia Rodríguez
- Department of Dentistry, Universidad Federico Henríquez y Carvajal, Santo Domingo, Dominican Republic
| | - Bruno Macedo de Sousa
- Institute for Occlusion and Orofacial Pain, Faculty of Medicine, University of Coimbra, Polo I‐Edifício Central Rua Larga, Coimbra, Portugal
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4
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Magat G, Oncu E, Ozcan S, Orhan K. Comparison of cone-beam computed tomography and digital panoramic radiography for detecting peri-implant alveolar bone changes using trabecular micro-structure analysis. J Korean Assoc Oral Maxillofac Surg 2022; 48:41-49. [PMID: 35221306 PMCID: PMC8890962 DOI: 10.5125/jkaoms.2022.48.1.41] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/13/2021] [Accepted: 09/28/2021] [Indexed: 11/07/2022] Open
Abstract
Objectives We compared changes in fractal dimension (FD) and grayscale value (GSV) of peri-implant alveolar bone on digital panoramic radiography (DPR) and cone-beam computed tomography (CBCT) immediately after implant surgery and 12 months postoperative. Materials and Methods In this retrospective study, 16 patients who received posterior mandibular area dental implants with CBCT scans taken about 2 weeks after implantation and one year after implantation were analyzed. A region of interest was selected for each patient. FDs and GSVs were evaluated immediately after implant surgery and at 12-month follow-up to examine the functional loading of the implants. Results There were no significant differences between DPR and CBCT measurements of FD values (P>0.05). No significant differences were observed between FD values and GSVs calculated after implant surgery and at the 12-month follow-up (P>0.05). GSVs were not correlated with FD values (P>0.05). Conclusion The DPR and reconstructed panoramic CBCT images exhibit similar image quality for the assessment of FD. There were no changes in FD values or GSVs of the peri-implant trabecular bone structure at the 12-month postoperative evaluation of the functional loading of the implant in comparison to values immediately after implantation. GSVs representing bone mass do not align with FD values that predict bone microstructural parameters. Therefore, GSVs and FDs should be considered different parameters for assessing bone quality.
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Affiliation(s)
- Guldane Magat
- Department of Oral and Maxillofacial Radiology, Konya, Turkey
| | - Elif Oncu
- Department of Periodontology, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Sevgi Ozcan
- Department of Oral and Maxillofacial Radiology, Konya, Turkey
| | - Kaan Orhan
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
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5
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Mei CC, Lin YT, Chang CC, Hong A, Hong HH. The developing patterns of calibrated implant stability quotients of posterior implants. J Dent Sci 2022; 17:241-248. [PMID: 35028044 PMCID: PMC8739243 DOI: 10.1016/j.jds.2021.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/10/2021] [Indexed: 12/05/2022] Open
Abstract
Background/Purpose Many surgical protocols were modified to improve implant stability. However, the conclusions of applying osteotome condensation technique could enhance implant stability were controversial. The evaluated implant stability quotients (ISQ) were calibrated to differentiate the implant stability improvement that applied by varied surgical techniques and the bone quality at recipient sites. Therefore, this study examine the developing patterns of calibrated ISQ values induced by osteotome bone condensation and conventional drilling technique at the posterior ridges. Materials and methods The ISQ values of 4.1/4.8-mm diameter implants were calibrated by 3.3-mm diameter implants (ISQb). Osteotome condensation technique was applied on the sites with ISQb ≤ 65 while those with ISQb > 65 were treated with conventional drilling technique. The implant ISQ values at Week 0, 1, 2, 3, 4, 6, 8, 10, 12 were recorded. The detected and calibrated ISQ values were statistically analyzed. Results Maxillary 14 implants and mandibular 16 implants using osteotome technique, maxillary 15 implants and mandibular 16 implants with conventional drilling technique were studied. Both techniques showed a generally similar ISQ developing pattern at both arches. Without calibration, significantly less ISQ values were noted for the osteotome technique of posterior maxilla at initial four weeks; subsequently, both techniques presented a comparable ISQ developing pattern. Osteotome technique demonstrated a greater ISQ increase after calibration on both arches (p < 0.05). All implants reached an ISQ stability plateau between Week 8 and 10. Conclusion With calibration, osteotome condensation technique could enhance greater primary and secondary implant stability for both arches.
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Affiliation(s)
- Chih-Chun Mei
- Department of Periodontics, New Taipei City Municipal Tucheng Hospital, New Taipei City, Taiwan.,Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan
| | - Yen-Ting Lin
- Department of Periodontics, Taoyuan Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chung-Chieh Chang
- Department of Periodontics, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan
| | - Alex Hong
- Department of Periodontics, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Hsiang-Hsi Hong
- Department of Periodontics, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan
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6
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Hsieh MC, Huang CH, Lin CL, Hsu ML. Effect of implant design on the initial biomechanical stability of two self-tapping dental implants. Clin Biomech (Bristol, Avon) 2020; 74:124-130. [PMID: 32361012 DOI: 10.1016/j.clinbiomech.2020.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 02/02/2020] [Accepted: 02/19/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND This study evaluated the effect of two self-tapping implants on implant stability in immediate implantation. METHODS Two types of self-tapping implants, straight flute (STF) and spiral flute (SPF) designs, were studied. Two synthetic bone blocks with varying densities (0.32 g/cm3 and 0.16 g/cm3) were chosen to simulate the bone quality of the anterior maxilla. Insertion torque values were measured by a torque testing machine during implant insertion. Four biomechanical tests were performed: resonance frequency analysis was conducted using the Osstell device, and the strengths of screw push-in, lateral bending, and pull-out were evaluated using an MTS machine. The strength for each design feature was obtained by averaging the results of 10 trials. In total, 40 specimens were tested for each bone density. Statistical difference was determined by one-way analysis of variance followed by Bonferroni post hoc multiple tests between groups. FINDINGS The STF and SPF groups exhibited similar insertion torque values (p = 0.525 in low-density bone, and p = 0.99 in high-density bone). A significant difference (p < 0.001) was observed in the push-in test between the two groups when low-density bone was tested. The SPF group exhibited a significantly higher lateral bending force (p = 0.001) and a higher stiffness (p < 0.001) than the STF group in high-density bone. The SPF design attained higher (p < 0.001) ISQ numbers than the STF design, but all numbers were below 60. INTERPRETATION Implant stability can be influenced by the apical fixture design of self-tapping implants in immediate implantation.
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Affiliation(s)
- Min-Chieh Hsieh
- Department of Dentistry, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Chang-Hung Huang
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan
| | - Chun-Li Lin
- School of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan
| | - Ming-Lun Hsu
- School of Dentistry, National Yang-Ming University, Taipei, Taiwan.
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7
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Tabassum A, Meijer GJ, Cuijpers VMJI, Frank Walboomers X. Combined effect of undersized surgical technique and axial compression on the primary implant stability and host bone architecture. Saudi Dent J 2020; 33:283-291. [PMID: 34194192 PMCID: PMC8236550 DOI: 10.1016/j.sdentj.2020.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/05/2020] [Accepted: 03/08/2020] [Indexed: 12/11/2022] Open
Abstract
Aim The aim of this study was to investigate the combined effect of the lateral-compression of host-bone (undersized-osteotomy-preparation) and axial-compression of host-bone (not drilling the full length of the implant) on the primary-implant-stability and the host-bone-architecture. Materials and Methods In this experimental-study, 44 dental implants (diameter-4.2 mm; length-10 mm; Dyna®) were installed in the femoral-condyles of four cadaver-goats using four different surgical approaches (11 implant/surgical approach; n = 11). Approach-1: Standard preparation according to the manufacturer's guidelines. The bone-cavity was prepared up to 10 mm in depth and 4 mm in diameter. Approach-2: Preparation up to 8 mm in depth and 4 mm in diameter. Approach-3: Preparation up to 10 mm in depth. Approach-4: The bone-cavity was prepared up to 8 mm in depth and 3.6 mm in diameter. Insertion torque (n = 11), removal torque (n = 7) and % bone-implant contact (n = 4) measurements were recorded. Bone architecture was assessed by micro-computer tomography and histological analysis (n = 4). Results For approaches 2, 3, and 4 (P < .05), insertion-torque values were significantly higher as compared to approach 1. Regarding the bone-implant-contact percentage (%BIC), approach 3 and 4 were significantly higher compared to approach 1 and 2 (P<.05). For approach 2, the %bone volume (%BV) was significantly higher as compared to approach 1 (P<.05) for the most the inner zone of host bone in proximity of the implant. Conclusion Lateral and axial compression improved the primary-implant-stability and therefore this new surgical-technique should be considered as an alternative approach especially for placing implants in low-density bone. Nevertheless, additional in vivo studies should be performed.
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Affiliation(s)
- Afsheen Tabassum
- Department of Preventive Dentistry, Imam Abdulrahman Bin Faisal University, College of Dentistry Dammam, Saudi Arabia
| | - Gert J Meijer
- Department of Implantology & Periodontology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.,Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands
| | - Vincent M J I Cuijpers
- Department of Biomaterials, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - X Frank Walboomers
- Department of Biomaterials, Radboud University Medical Centre, Nijmegen, the Netherlands
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8
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Under-Drilling versus Hybrid Osseodensification Technique: Differences in Implant Primary Stability and Bone Density of the Implant Bed Walls. MATERIALS 2020; 13:ma13020390. [PMID: 31952138 PMCID: PMC7013970 DOI: 10.3390/ma13020390] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/08/2020] [Accepted: 01/13/2020] [Indexed: 01/11/2023]
Abstract
The goal of this study was to evaluate the effects of two implant bed preparation techniques on the implant primary stability (IPS) and the bone density of the implant site. We completed 40 implant bed osteotomies in pig ribs using two techniques: osseodensification (OD) plus under-drilling (UD) with universal osseodensification drills (Test A), and under-drilling alone with drills of the same implant system (Test B). Implants with a 4.1 mm diameter and 10 mm length were inserted, and the IPS was evaluated with three methods: (insertion torque (IT), periotest (PTV), and resonance frequency analysis (RFA). The bone density was evaluated using micro-computed tomography. ANOVA and Tukey’s post-hoc test were used for comparison of the IPS values, and Kruskal–Wallis was used to evaluate the bone density. Statistical significance was set at p < 0.05. The tested B technique (UD) achieved a higher IPS compared to the Test A technique (OD + UD) for all the evaluation methods (p < 0.05). Bone density was higher at the apical and middle region in Test A compared to Test B and control sites (p < 0.05). We concluded that although the bone density increased with the hybrid OD technique with universal drills, implant beds prepared with UD using drills with geometry similar to that of the implant are more efficient at increasing IPS values.
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9
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Hayek E, Aoun G, Bassit R, Nasseh I. Correlating Radiographic Fractal Analysis at Implant Recipient Sites with Primary Implant Stability: An In Vivo Preliminary Study. Cureus 2020; 12:e6539. [PMID: 31929956 PMCID: PMC6939963 DOI: 10.7759/cureus.6539] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Objectives The aim of this study was to demonstrate a possible correlation between radiographic trabecular bone quantified with fractal dimensions analysis and values of primary implant stability deliberated using the Osstell® monitor (Integration Diagnostics AB, Goteborgsvagen, Sweden) with the density of bone specimens harvested from the implant recipient sites and calculated using the mass and volume of the bone bloc specimens. Material and methods Fifty implants of the same brand, diameter, and length were inserted with the same surgical procedures; 25 implants in the molar premolar region of the maxilla and 25 implants in the mandibular posterior region of only healthy male patients between 20 and 50 years of age. Prior to the placement of the implants, biopsies were taken from the selected site for density calculation using a calibrated trephine. Two photostimulable phosphor digital periapical radiographs were obtained for each patient and two regions of interest were selected for a fractal dimension analysis: one site before implantation and the same site immediately postoperatively adjacent to the implant. Results There were correlations between the fractal dimensions and implant stability quotient as well as between fractal dimensions and bone density. No significant difference was found between the fractal dimensions of pre- and postoperative periapical radiographs for the same region of interest and between implant stability quotient values of the maxillae and mandible sites. Conclusion All executed analyses were helpful in assessing the bone density in the recipient site of implant placement using fractal dimensions, offering complementary information about predictable bone density assessed on a periapical radiograph.
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Affiliation(s)
- Elie Hayek
- Oral and Maxillofacial Radiology, Faculty of Dental Medicine, Lebanese University, Beirut, LBN
| | - Georges Aoun
- Oral and Maxillofacial Radiology, Faculty of Dental Medicine, Lebanese University, Beirut, LBN
| | - Roger Bassit
- Oral Surgery, Faculty of Dental Medicine, Lebanese University, Beirut, LBN
| | - Ibrahim Nasseh
- Oral and Maxillofacial Radiology, Faculty of Dental Medicine, Lebanese University, Beirut, LBN
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10
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Stocchero M, Jinno Y, Toia M, Ahmad M, Papia E, Yamaguchi S, Becktor JP. Intraosseous Temperature Change during Installation of Dental Implants with Two Different Surfaces and Different Drilling Protocols: An In Vivo Study in Sheep. J Clin Med 2019; 8:jcm8081198. [PMID: 31405207 PMCID: PMC6723378 DOI: 10.3390/jcm8081198] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/03/2019] [Accepted: 08/06/2019] [Indexed: 12/30/2022] Open
Abstract
Background: The intraosseous temperature during implant installation has never been evaluated in an in vivo controlled setup. The aims were to investigate the influence of a drilling protocol and implant surface on the intraosseous temperature during implant installation, to evaluate the influence of temperature increase on osseointegration and to calculate the heat distribution in cortical bone. Methods: Forty Brånemark implants were installed into the metatarsal bone of Finnish Dorset crossbred sheep according to two different drilling protocols (undersized/non-undersized) and two surfaces (moderately rough/turned). The intraosseous temperature was recorded, and Finite Element Model (FEM) was generated to understand the thermal behavior. Non-decalcified histology was carried out after five weeks of healing. The following osseointegration parameters were calculated: Bone-to-implant contact (BIC), Bone Area Fraction Occupancy (BAFO), and Bone Area Fraction Occupancy up to 1.5 mm (BA1.5). A multiple regression model was used to identify the influencing variables on the histomorphometric parameters. Results: The temperature was affected by the drilling protocol, while no influence was demonstrated by the implant surface. BIC was positively influenced by the undersized drilling protocol and rough surface, BAFO was negatively influenced by the temperature rise, and BA1.5 was negatively influenced by the undersized drilling protocol. FEM showed that the temperature at the implant interface might exceed the limit for bone necrosis. Conclusion: The intraosseous temperature is greatly increased by an undersized drilling protocol but not from the implant surface. The temperature increase negatively affects the bone healing in the proximity of the implant. The undersized drilling protocol for Brånemark implant systems increases the amount of bone at the interface, but it negatively impacts the bone far from the implant.
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Affiliation(s)
- Michele Stocchero
- Department of Oral & Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - Yohei Jinno
- Department of Oral & Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden.
| | - Marco Toia
- Department of Oral & Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - Marianne Ahmad
- Department of Oral & Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - Evaggelia Papia
- Department of Materials Science and Technology, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - Satoshi Yamaguchi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Jonas P Becktor
- Department of Oral & Maxillofacial Surgery and Oral Medicine, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
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11
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Bätz J, Messer-Hannemann P, Lampe F, Klein A, Püschel K, Morlock MM, Campbell GM. Effect of cavity preparation and bone mineral density on bone-interface densification and bone-implant contact during press-fit implantation of hip stems. J Orthop Res 2019; 37:1580-1589. [PMID: 30908684 DOI: 10.1002/jor.24288] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 03/06/2019] [Indexed: 02/04/2023]
Abstract
Implant loosening and periprosthetic fracture are two major revision causes for uncemented hip stems. The chosen method of cavity preparation could play a key role for both failure mechanisms. The aim of this study was to determine the dependence of the broach type as well as patient bone mineral density (BMD) on densification and contact conditions at the bone-implant interface. Hip stems were implanted into cadaveric femora using compaction, blunt extraction or sharp extraction broaches with computed tomography scans performed prior to broaching, after broaching and after stem implantation. Proximal periprosthetic bone densification as well as press-fit, contact area and stem seating relative to the last broach were determined. Median bone densification was higher with the compaction and blunt extraction broaches compared to sharp extraction broaches (181% and 177%, respectively, p = 0.002). The bone densification of femora prepared with compaction broaching increased with higher BMD (R2 = 0.183, p = 0.037), while stem seating decreased with higher BMD for all broach types (R2 = 0.259, p = 0.001). Incomplete seated prostheses were associated with smaller press-fit and bone-implant contact area (R2 = 0.249, p = 0.001; R2 = 0.287, p < 0.001). Clinical Significance: The results suggest that compaction broaching maximizes bone densification in patients with higher bone density. However, there appears to be an increased risk of insufficient stem seating in high-density bone that could limit the benefits for primary stability. For lower quality bone, the broach type appears to play a lesser role, but care must be taken to limit extensive stem seating which might increase periprosthetic fracture risk. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1580-1589, 2019.
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Affiliation(s)
- Johanna Bätz
- Institute of Biomechanics, TUHH Hamburg University of Technology, Germany
| | | | - Frank Lampe
- Department of Life Sciences, Hamburg University of Applied Sciences, Germany
| | - Anke Klein
- Department of Legal Medicine, University Medical Center Hamburg-Eppendorf, Germany
| | - Klaus Püschel
- Department of Legal Medicine, University Medical Center Hamburg-Eppendorf, Germany
| | - Michael M Morlock
- Institute of Biomechanics, TUHH Hamburg University of Technology, Germany
| | - Graeme M Campbell
- Institute of Biomechanics, TUHH Hamburg University of Technology, Germany
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12
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Souza FÁ, Furtado TSM, Dayube URC, Melo WM, Nishioka RS, Poli PP, Maiorana C, de Carvalho PSP. Comparative in vivo study of alloy titanium implants with two different surfaces: biomechanical and SEM analysis. Clin Oral Investig 2019; 23:4383-4397. [PMID: 30972600 DOI: 10.1007/s00784-019-02872-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 02/19/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The purpose of this study was to evaluate the biomechanical behavior of the interface formed between bone and implants with machined surfaces (MS) and those modified by Al2O3 sandblasting and acid etching (SBAS). MATERIALS AND METHODS Before surgery, topographic characterization was performed by SEM-EDX and by mean roughness measurements. Ten Albinus rabbits received randomly 20 Ti-6Al-4V implants on its right and left tibiae, with one implant placed in each tibia. After implant insertion, the implant stability quotient (ISQ) was measured by means of resonance frequency analysis (RFA). After 3 and 6 weeks, the ISQ was again measured, followed by torque removal measurements. Analysis of variance and Tukey tests were used to analyze the data. The surface of the implants removed was evaluated by SEM-EDX. Immunohistochemical analysis of osteopontin (OPN) and osteocalcin (OC) protein was performed in bone tissue. RESULTS The topographic characterization showed differences between the analyzed surfaces, and the mean roughness values of SBAS group were statistically higher than MS. Overall, higher statistically significant ISQ values were observed in the SBAS group compared to the MS group (p = 0.012). The intra-group comparison of ISQ values in the SBAS group showed statistically significant differences between 0 and 3 weeks (p = 0.032) and 0 and 6 weeks (p = 0.003). The torque removal measurements of group SBAS were statistically higher when compared with the torque removal measurements of group MS in the time intervals of 3 weeks (p = 0.002) and 6 weeks (p < 0.001). SEM-EDX of the implant surfaces removed in SBAS group showed greater bone tissue covering and mean values atomic in percentage of Ca, P, and O statistically superior (p < 0.05) than MS group. Immunohistochemical reactions showed intense OC immunolabeling at 6 weeks postoperative for SBAS group. CONCLUSIONS The topographical modifications made in group SBAS allowed a better mechanical interlocking between the implant and bone tissue.
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Affiliation(s)
- Francisley Ávila Souza
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho, São Paulo, Brazil.
| | - Thayane Silveira Mata Furtado
- Implant Dentistry Postgraduate Program, São Leopoldo Mandic School of Dentistry and Research Center, Campinas, Brazil
| | - Ulisses Ribeiro Campos Dayube
- Implant Dentistry Postgraduate Program, São Leopoldo Mandic School of Dentistry and Research Center, Campinas, Brazil
| | - Willian Moraes Melo
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho, São Paulo, Brazil
| | - Renato Sussumu Nishioka
- Department of Materials Dental and Prosthesis, São José dos Campos Dental of School, São Paulo State University Júlio de Mesquita Filho, São Paulo, Brazil
| | - Pier Paolo Poli
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Maggiore Policlinico Hospital, University of Milan, Milan, Italy
| | - Carlo Maiorana
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Maggiore Policlinico Hospital, University of Milan, Milan, Italy
| | - Paulo Sérgio Perri de Carvalho
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho, São Paulo, Brazil.,Implant Dentistry Postgraduate Program, São Leopoldo Mandic School of Dentistry and Research Center, Campinas, Brazil
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13
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DE Colli M, Radunovic M, Zizzari VL, DI Giacomo V, DI Nisio C, Piattelli A, Calvo Guirado JL, Zavan B, Cataldi A, Zara S. Osteoblastic differentiating potential of dental pulp stem cells in vitro cultured on a chemically modified microrough titanium surface. Dent Mater J 2018; 37:197-205. [PMID: 29415969 DOI: 10.4012/dmj.2016-418] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Titanium surface modification is critical for dental implant success. Our aim was to determine surfaces influence on dental pulp stem cells (DPSCs) viability and differentiation. Implants were divided into sandblasted/acid-etched (control) and sandblasted/acid-etched coated with calcium and magnesium ions (CaMg), supplied as composite (test). Proliferation was evaluated by MTT, differentiation checking osteoblastic gene expression, PGE2 secretion and matrix formation, inflammation by Interleukin 6 (IL-6) detection. MTT and IL-6 do not modify on test. A PGE2 increase on test is recorded. BMP2 is higher on test at early experimental points, Osterix and RUNX2 augment later. Alizarin-red S reveals higher matrix production on test. These results suggest that test surface is more osteoinductive, representing a start point for in vivo studies aiming at the construction of more biocompatible dental implants, whose integration and clinical performance are improved and some undesired effects, such as implant stability loss and further surgical procedures, are reduced.
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Affiliation(s)
| | | | | | | | - Chiara DI Nisio
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara
| | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University G. d'Annunzio" Chieti-Pescara
| | - José L Calvo Guirado
- Faculty of Medicine and Dentistry, Universidad Catolica San Antonio De Murcia (UCAM)
| | - Barbara Zavan
- Department of Biomedical Sciences, University of Padova
| | - Amelia Cataldi
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara
| | - Susi Zara
- Department of Pharmacy, University "G. d'Annunzio" Chieti-Pescara
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Effects of Hard Thin-Film Coatings on Adhesion of Early Colonizer Bacteria Over Titanium Surfaces. IMPLANT DENT 2017; 25:114-21. [PMID: 26540365 DOI: 10.1097/id.0000000000000355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE The purpose of this in vitro study was to evaluate the effect of diamond-like carbon (DLC) and titanium (Ti) nitride coatings over Ti surfaces on the adhesion of early colonizer bacteria. MATERIALS AND METHODS Specimens were divided into 3 groups (n = 10) according to different surface modifications: titanium nitride (TiN)-coated Ti discs (experimental group 1), DLC-coated Ti discs (experimental group 2), and uncoated polished Ti discs (control group). Discs were incubated in bacterial cell suspension (Streptococcus mutans and Streptococcus sanguis) for 1 hour, and the single colonies formed by adhering bacteria were counted by fluorescence microscopy. Surface roughness and topography were examined by atomic force microscopy. RESULTS The surface roughness of DLC was lower than TiN coating and the control group. Statistically significant reduction of the number of adherent bacteria was observed on DLC-coated surfaces. CONCLUSIONS DLC coating over Ti surfaces strongly inhibits the adhesion of early colonizer oral bacteria.
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Ma R, Yu Z, Tang S, Pan Y, Wei J, Tang T. Osseointegration of nanohydroxyapatite- or nano-calcium silicate-incorporated polyetheretherketone bioactive composites in vivo. Int J Nanomedicine 2016; 11:6023-6033. [PMID: 27881916 PMCID: PMC5115692 DOI: 10.2147/ijn.s115286] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Polyetheretherketone (PEEK) exhibits appropriate biomechanical strength as well as good biocompatibility and stable chemical properties but lacks bioactivity and cannot achieve highly efficient osseointegration after implantation. Incorporating bioceramics into the PEEK matrix is a feasible approach for improving its bioactivity. In this study, nanohydroxyapatite (n-HA) and nano-calcium silicate (n-CS) were separately incorporated into PEEK to prepare n-HA/PEEK and n-CS/PEEK biocomposites, respectively, using a compounding and injection-molding technique, and the in vitro degradation characteristics were evaluated. Discs with a diameter of 8 mm were inserted in 8 mm full-thickness cranial defects in rabbits for 4 and 8 weeks, and implantation of pure PEEK was used as the control. Three-dimensional microcomputed tomography, histological analysis, fluorescence microscopy of new bone formation, and scanning electron microscopy were used to evaluate the osseointegration performance at the bone/implant interface. The results of the in vitro degradation study demonstrated that degradation of n-CS on the surface of n-CS/PEEK could release Ca and Si ions and form a porous structure. In vivo tests revealed that both n-CS/PEEK and n-HA/PEEK promoted osseointegration at the bone/implant interface compared to PEEK, and n-CS/PEEK exhibited higher bone contact ratio and more new bone formation compared with those of n-HA/PEEK, implying that n-CS/PEEK possessed a stronger ability to promote osseointegration. These two PEEK biocomposites are promising materials for the preparation of orthopedic or craniofacial implants.
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Affiliation(s)
- Rui Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China; Department of Orthopedic Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shanxi Province, People's Republic of China
| | - Zhifeng Yu
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Yongkang Pan
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Tingting Tang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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16
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Santamaría-Arrieta G, Brizuela-Velasco A, Fernández-González FJ, Chávarri-Prado D, Chento-Valiente Y, Solaberrieta E, Diéguez-Pereira M, Vega JA, Yurrebaso-Asúa J. Biomechanical evaluation of oversized drilling technique on primary implant stability measured by insertion torque and resonance frequency analysis. J Clin Exp Dent 2016; 8:e307-11. [PMID: 27398182 PMCID: PMC4930641 DOI: 10.4317/jced.52873] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 01/21/2016] [Indexed: 11/30/2022] Open
Abstract
Background This study evaluated the influence of implant site preparation depth on primary stability measured by insertion torque and resonance frequency analysis (RFA). Material and Methods Thirty-two implant sites were prepared in eight veal rib blocks. Sixteen sites were prepared using the conventional drilling sequence recommended by the manufacturer to a working depth of 10mm. The remaining 16 sites were prepared using an oversize drilling technique (overpreparation) to a working depth of 12mm. Bone density was determined using cone beam computerized tomography (CBCT). The implants were placed and primary stability was measured by two methods: insertion torque (Ncm), and RFA (implant stability quotient [ISQ]). Results The highest torque values were achieved by the conventional drilling technique (10mm). The ANOVA test confirmed that there was a significant correlation between torque and drilling depth (p<0.05). However, no statistically significant differences were obtained between ISQ values at 10 or 12 mm drilling depths (p>0.05) at either measurement direction (cortical and medullar). No statistical relation between torque and ISQ values was identified, or between bone density and primary stability (p
>0.05). Conclusions Vertical overpreparation of the implant bed will obtain lower insertion torque values, but does not produce statistically significant differences in ISQ values. Key words:Implant stability quotient, overdrilling, primary stability, resonance frequency analysis, torque.
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Affiliation(s)
- Gorka Santamaría-Arrieta
- Professor Department of Stomatology I, School of Medicine and Dentistry, University of the Basque Country, Leioa, Spain
| | - Aritza Brizuela-Velasco
- Professor Department of Surgery and medical-surgical specialties, University of Oviedo, Oviedo, Spain
| | | | - David Chávarri-Prado
- Professor Department of Stomatology I, School of Medicine and Dentistry, University of the Basque Country, Leioa, Spain
| | - Yelko Chento-Valiente
- Graduate student. Engineering Physics Department of Nuclear Engineering and Fluid Mechanics, Engineering School, University of the Basque Country, Bilbao, Spain
| | - Eneko Solaberrieta
- Researcher. Department of Graphic Design and Engineering Projects, University of the Basque Country UPV/EHU, Bilbao, Spain
| | - Markel Diéguez-Pereira
- Student of oral implantology degree in the University of the Basque Country, Leioa, Spain
| | - José-Antonio Vega
- Professor and full chair. Department of morphology and Cell Biology, University of Oviedo, Spain; Professor. Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Chile
| | - Jaime Yurrebaso-Asúa
- Student of oral implantology degree in the University of the Basque Country, Leioa, Spain
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Fibronectin-Grafted Titanium Dental Implants: An In Vivo Study. BIOMED RESEARCH INTERNATIONAL 2016; 2016:2414809. [PMID: 27366739 PMCID: PMC4913050 DOI: 10.1155/2016/2414809] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 03/23/2016] [Accepted: 05/09/2016] [Indexed: 12/29/2022]
Abstract
Modification of the physiochemical properties of titanium surfaces using glow discharge plasma (GDP) and fibronectin coating has been shown to enhance the surface hydrophilicity, surface roughness, cell adhesion, migration, and proliferation. This in vivo study aimed to evaluate the bone integration efficacy of a biologically modified implant surface. Two different surface-modified implants (Ar-GDP and GDP-fib) were placed in the mandibular premolar area of six beagle dogs for 2–8 weeks. Three techniques [histologic evaluation, resonance frequency analysis (RFA), and microcomputed tomography (micro-CT) evaluation] were used to detect the implant stability and bone-implant contact. The implant stability quotient values of GDP-fib implants were significantly greater than the Ar-GDP implants at 2 and 4 weeks (P < 0.01). The bone volume/total volume ratio of GDP-fib implants was greater than the Ar-GDP implants in micro-CT evaluation. A high positive correlation was observed between RFA and micro-CT measurements. At 2 weeks, osteoblasts were seen to line the implant surface, and multinuclear osteoclasts could be seen on the surface of old parent bone. After 8 weeks, a majority of the space in the wound chamber appeared to be replaced by bone. Enhancement of the stability of biologically modified implants was proved by the results of RFA, micro-CT, and histological analysis. This enhanced stability may help fasten treatment and be clinically beneficial.
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Yamaguchi Y, Shiota M, FuJii M, Sekiya M, Ozeki M. Development and application of a direct method to observe the implant/bone interface using simulated bone. SPRINGERPLUS 2016; 5:494. [PMID: 27186458 PMCID: PMC4839028 DOI: 10.1186/s40064-016-2116-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/06/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND Primary stability after implant placement is essential for osseointegration. It is important to understand the bone/implant interface for analyzing the influence of implant design on primary stability. In this study rigid polyurethane foam is used as artificial bone to evaluate the bone-implant interface and to identify where the torque is being generated during placement. METHODS Five implant systems-Straumann-Standard (ST), Straumann-Bone Level (BL), Straumann-Tapered Effect (TE), Nobel Biocare-Brånemark MKIII (MK3), and Nobel Biocare-Brånemark MKIV (MK4)-were used for this experiment. Artificial bone blocks were prepared and the implant was installed. After placement, a metal jig and one side artificial bone block were removed and then the implant embedded in the artificial bone was exposed for observing the bone-implant interface. A digital micro-analyzer was used for observing the contact interface. RESULTS The insertion torque values were 39.35, 23.78, 12.53, 26.35, and 17.79 N cm for MK4, BL, ST, TE, and MK3, respectively. In ST, MK3, TE, MK4, and BL the white layer areas were 61 × 103 μm(2), 37 × 103 μm(2), 103 × 103 μm(2) in the tapered portion and 84 × 03 μm(2) in the parallel portion, 134 × 103 μm(2), and 98 × 103 μm(2) in the tapered portion and 87 × 103 μm(2) in the parallel portion, respectively. CONCLUSIONS The direct observation method of the implant/artificial bone interface is a simple and useful method that enables the identification of the area where implant retention occurs. A white layer at the site of stress concentration during implant placement was identified and the magnitude of the stress was quantitatively estimated. The site where the highest torque occurred was the area from the thread crest to the thread root and the under and lateral aspect of the platform. The artificial bone debris created by the self-tapping blade accumulated in both the cutting chamber and in the space between the threads and artificial bone.
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Affiliation(s)
- Yoko Yamaguchi
- Department of Implant Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515 Japan
| | - Makoto Shiota
- Division of Oral Health Sciences, Department of Masticatory Function Rehabilitation, Oral Implantology and Regenerative Dental Medicine, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Masaki FuJii
- Dental Implant Clinic, Dental Hospital, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510 Japan
| | - Michi Sekiya
- Department of Implant Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515 Japan
| | - Masahiko Ozeki
- Department of Implant Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515 Japan ; Dental Implant Center, Showa Dental Hospital, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515 Japan
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Gramanzini M, Gargiulo S, Zarone F, Megna R, Apicella A, Aversa R, Salvatore M, Mancini M, Sorrentino R, Brunetti A. Combined microcomputed tomography, biomechanical and histomorphometric analysis of the peri-implant bone: a pilot study in minipig model. Dent Mater 2016; 32:794-806. [PMID: 27063459 DOI: 10.1016/j.dental.2016.03.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 03/09/2016] [Accepted: 03/22/2016] [Indexed: 12/13/2022]
Abstract
OBJECTIVES To present a practical approach that combines biomechanical tests, microcomputed tomography (μCT) and histomorphometry, providing quantitative results on bone structure and mechanical properties in a minipig model, in order to investigate the specific response to an innovative dental biomaterial. METHODS Titanium implants with innovative three-dimensional scaffolds were inserted in the tibias of 4 minipigs. Primary stability and osseointegration were investigated by means of insertion torque (IT) values, resonance frequency analysis (RFA), bone-to-implant contact (BIC), bone mineral density (BMD) and stereological measures of trabecular bone. RESULTS A significant positive correlation was found between IT and RFA (r=0.980, p=0.0001). BMD at the implant sites was 18% less than the reference values (p=0.0156). Peri-implant Tb.Th was 50% higher, while Tb.N was 50% lower than the reference zone (p<0.003) and they were negatively correlated (r=-0.897, p=0.006). SIGNIFICANCE μCT increases evaluation throughput and offers the possibility for qualitative three-dimensional recording of the bone-implant system as well as for non-destructive evaluation of bone architecture and mineral density, in combination with conventional analysis methods. The proposed multimodal approach allows to improve accuracy and reproducibility for peri-implant bone measurements and could support future investigations.
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Affiliation(s)
- Matteo Gramanzini
- Institute of Biostructure and Bioimaging, National Research Council, Via T. De Amicis 95, 80145 Naples, Italy; CEINGE scarl, Via G. Salvatore 486, 80145 Naples, Italy.
| | - Sara Gargiulo
- Institute of Biostructure and Bioimaging, National Research Council, Via T. De Amicis 95, 80145 Naples, Italy; CEINGE scarl, Via G. Salvatore 486, 80145 Naples, Italy.
| | - Fernando Zarone
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University "Federico II", Via Pansini 5, 80131 Naples, Italy.
| | - Rosario Megna
- Institute of Biostructure and Bioimaging, National Research Council, Via T. De Amicis 95, 80145 Naples, Italy.
| | - Antonio Apicella
- Department of Architecture and Industrial Design, Second University of Naples, Borgo San Lorenzo, 81031 Aversa, Italy.
| | - Raffaella Aversa
- Department of Architecture and Industrial Design, Second University of Naples, Borgo San Lorenzo, 81031 Aversa, Italy.
| | | | - Marcello Mancini
- Institute of Biostructure and Bioimaging, National Research Council, Via T. De Amicis 95, 80145 Naples, Italy.
| | - Roberto Sorrentino
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University "Federico II", Via Pansini 5, 80131 Naples, Italy; Department of Architecture and Industrial Design, Second University of Naples, Borgo San Lorenzo, 81031 Aversa, Italy.
| | - Arturo Brunetti
- Department of Advanced Medical Sciences, University "Federico II", Via Pansini 5, 80145 Naples, Italy; CEINGE scarl, Via G. Salvatore 486, 80145 Naples, Italy.
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Eroglu CN, Ertugrul AS, Eskitascioglu M, Eskitascioglu G. Changes in the surface of bone and acid-etched and sandblasted implants following implantation and removal. Eur J Dent 2016; 10:77-81. [PMID: 27011744 PMCID: PMC4784159 DOI: 10.4103/1305-7456.175679] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Objective: The aim of this study was to determine whether there are any changes in the surface of bone or implant structures following the removal of a screwed dental implant. Materials and Methods: For this, six individual samples of acid-etched and sandblasted implants from three different manufacturers’ implant systems were used. They were screwed in a D1 bovine bone, and they were removed after primary stabilization. The bone and implant surfaces are evaluated with scanning electron microscope. Results: Through examination of the surfaces of the bone prior to implantation and of the used and unused implant surfaces, it was found that inhomogeneity in the implant surface can cause microcracking in the bone. Conclusions: This is attributed to the stress induced during the implantation of self-tapping implants and suggests that a tap drill may be required in some instances to protect the implant surface.
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Affiliation(s)
- Cennet Neslihan Eroglu
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Yuzuncu Yil University, Van, Turkiye
| | - Abdullah Seckin Ertugrul
- Department of Periodontology, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkiye
| | - Murat Eskitascioglu
- Department of Prosthodontics, Faculty of Dentistry, Yuzuncu Yil University, Van, Turkiye
| | - Gurcan Eskitascioglu
- Department of Prosthodontics, Faculty of Dentistry, Yuzuncu Yil University, Van, Turkiye
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Sridhar S, Wilson TG, Valderrama P, Watkins-Curry P, Chan JY, Rodrigues DC. In Vitro Evaluation of Titanium Exfoliation During Simulated Surgical Insertion of Dental Implants. J ORAL IMPLANTOL 2016; 42:34-40. [DOI: 10.1563/aaid-joi-d-14-00230] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dissolution of titanium wear particles in the oral environment, and their accumulation in the surrounding tissues have been associated with failure of dental implants (DI). The goal of this study is to investigate the effect of mechanical forces involved in surgical insertion of DI on surface wear and metal particle generation. It was hypothesized that mechanical factors associated with implant placement can lead to the generation of titanium particles in the oral environment. The testing methodology for surface evaluation employed simulated surgical insertion, followed by removal of DI in different densities of simulated bone material. Torsional forces were monitored for the insertion and removal of DI. The surface of the simulated bone materials was inspected with optical microscopy to detect traces of metallic particles that may have been generated during the procedure. Further characterization of the composition of powders collected from osteotomy cavities was conducted with powder X-ray diffraction. The results showed that the different densities of simulated bone material affected the torsional forces associated with implant insertion. However, the mechanical factors involved in the implant insertion/removal procedure did not generate wear particles, as confirmed by powder X-ray experiments.
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Affiliation(s)
| | | | | | | | - Julia Y. Chan
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas
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22
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Möhlhenrich SC, Heussen N, Loberg C, Goloborodko E, Hölzle F, Modabber A. Three-Dimensional Evaluation of Implant Bed Preparation and the Influence on Primary Implant Stability After Using 2 Different Surgical Techniques. J Oral Maxillofac Surg 2015; 73:1723-32. [DOI: 10.1016/j.joms.2015.03.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/26/2015] [Accepted: 03/31/2015] [Indexed: 10/23/2022]
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Yamaguchi Y, Shiota M, Munakata M, Kasugai S, Ozeki M. Effect of implant design on primary stability using torque-time curves in artificial bone. Int J Implant Dent 2015; 1:21. [PMID: 27747643 PMCID: PMC5005779 DOI: 10.1186/s40729-015-0024-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 07/28/2015] [Indexed: 11/11/2022] Open
Abstract
Background Primary stability following implant placement is essential for osseointegration and is affected by both implant design and bone density. The aim of this study was to compare the relationships between torque-time curves and implant designs in a poor bone quality model. Methods Nine implant designs, with five implants in each category, were compared. A total of 90 implants (Straumann: Standard RN, Bone Level RC, Tapered Effect RN; Nobel Biocare: Brånemark MKIII, MKIV) were placed in type IV artificial bone. Torque-time curves of insertion and removal were recorded at the rate of 1000 samples/s by a torque analyzer. Results The torque-time curves were divided into initial, parallel, tapered, and platform areas. The mean torque rise rate of the parallel area was smallest at 0.36 N · cm/s, with a significant difference from those of the other areas (p < 0.05). Values of 2.14, 2.33, and 2.65 N · cm/s were obtained for the initial, tapered, and platform areas, respectively. The removal torque for six of the implant designs (Bone Level RC 8, 10, and 12 mm; Tapered Effect RN 10 mm; Brånemark MKIII 10 mm, MKIV 10 mm) was significantly smaller than the corresponding insertion torque (p < 0.05). However, the removal torque for ST6, 8, and 10 was almost the same as or slightly greater than the corresponding insertion torque. Conclusions The insertion torque-time curves and design features of the implants were accurately transferred. Increasing implant taper angle appeared to increase the torque rate. Torque was mainly generated from the superior surface to the valley of the thread and the inferior and axial surfaces of the platform, while the inferior and axial surfaces of the thread did not significantly affect torque generation.
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Affiliation(s)
- Yoko Yamaguchi
- Department of Implant Dentistry, Showa University School of Dentistry, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515, Japan.
| | - Makoto Shiota
- Oral Implantology and Regenerative Dental Medicine, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Motohiro Munakata
- Oral Implantology Department of Prosthodontic Dentistry for Function of TMJ and Occlusion, Kanagawa Dental University, 82, Inaokachou, Yokosuka-shi, Kanagawa, 238-8580, Japan
| | - Shohei Kasugai
- Oral Implantology and Regenerative Dental Medicine, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Masahiko Ozeki
- Department of Implant Dentistry, Showa University School of Dentistry, 2-1-1 Kitasenzoku Ota-ku, Tokyo, 145-8515, Japan
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Effect of Increasing Doses of γ-Radiation on Bone Marrow Stromal Cells Grown on Smooth and Rough Titanium Surfaces. Stem Cells Int 2015; 2015:359416. [PMID: 26257788 PMCID: PMC4518184 DOI: 10.1155/2015/359416] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 06/28/2015] [Accepted: 07/01/2015] [Indexed: 02/05/2023] Open
Abstract
Radiation therapy for oral and maxillofacial tumors could damage bone marrow stromal cells (BMSCs) in jaw, which caused dental implant failure. However, how radiation affects BMSCs on SLA (sandblasted with large-grits, acid-etched) surfaces is still unknown. The aim of this study was to investigate effect of different dose of γ-radiation on BMSCs on SLA and PT (polished titanium) surfaces. Rat BMSCs were radiated with 2, 4, and 8 Gy γ-radiation and then seeded on both surfaces. Cell adhesion, spreading, and proliferation were tested. The osteogenesis and the adipogenesis ability were examined by Alizarin-Red and Oil-Red staining, respectively. Real-time PCR was performed to detect osteogenic (osteocalcin, OCN; runt-related transcription factor 2, Runx2) and adipogenic (peroxisome proliferator-activated receptor gamma, PPARγ) gene expression at days 7 and 14 postirradiation. Results showed that γ-radiation reduced cell proliferation, adhesion, spreading, and osteogenic differentiation. 2 Gy radiation promoted adipogenic differentiation, but it was significantly decreased when dosage reached 4 Gy. In conclusion, results suggest that γ-radiation influenced BMSCs behaviors in a dosage-dependent manner except adipogenic differentiation, low dose promoted it, and high dose inhibited it. This effect was influenced by surface characteristics, which may explain the different failure rate of various implants in patients after radiation.
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Influence of Underpreparation on Primary Stability of Implants Inserted in Poor Quality Bone Sites: An In Vitro Study. J Oral Maxillofac Surg 2015; 73:1084-8. [DOI: 10.1016/j.joms.2015.01.029] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/29/2015] [Accepted: 01/29/2015] [Indexed: 10/24/2022]
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Ulum MF, Nasution AK, Yusop AH, Arafat A, Kadir MRA, Juniantito V, Noviana D, Hermawan H. Evidences ofin vivobioactivity of Fe-bioceramic composites for temporary bone implants. J Biomed Mater Res B Appl Biomater 2014; 103:1354-65. [DOI: 10.1002/jbm.b.33315] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 09/28/2014] [Accepted: 10/18/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Mokhamad F. Ulum
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
- Faculty of Veterinary Medicine; Bogor Agricultural University; Bogor Indonesia
| | - Ahmad K. Nasution
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
- Faculty of Engineering; Muhammadiyah University of Riau; Riau Indonesia
| | - Abdul H. Yusop
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
| | - Andril Arafat
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
| | - Mohammed Rafiq A. Kadir
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
| | - Vetnizah Juniantito
- Faculty of Veterinary Medicine; Bogor Agricultural University; Bogor Indonesia
| | - Deni Noviana
- Faculty of Veterinary Medicine; Bogor Agricultural University; Bogor Indonesia
| | - Hendra Hermawan
- Faculty of Biosciences and Medical Engineering; University Teknologi Malaysia; Johor Bahru Malaysia
- Department of Mining; Metallurgical and Materials Engineering and CHU de Québec Research Center; Laval University; Quebec City Canada
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Deppe H, Grünberg C, Thomas M, Sculean A, Benner KU, Bauer FJM. Surface morphology analysis of dental implants following insertion into bone using scanning electron microscopy: a pilot study. Clin Oral Implants Res 2014; 26:1261-6. [DOI: 10.1111/clr.12449] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Herbert Deppe
- Department of Oral and Maxillofacial Surgery at the Klinikum Rechts Der Isar; Technische Universität München; Munich Germany
| | - Christina Grünberg
- Department of Restaurative Dentistry; Ludwig-Maximilians-Universität München; Munich Germany
| | - Mücke Thomas
- Department of Oral and Maxillofacial Surgery at the Klinikum Rechts Der Isar; Technische Universität München; Munich Germany
| | - Anton Sculean
- Department of Periodontology; University of Berne; Berne Switzerland
| | - Klaus-Ulrich Benner
- Anatomische Anstalt der Ludwig-Maxilimians-Universität München; Munich Germany
| | - Florian J. M. Bauer
- Department of Oral and Maxillofacial Surgery at the Klinikum Rechts Der Isar; Technische Universität München; Munich Germany
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Abstract
Researchers are in constant search for the ideal implant surface condition in an attempt to improve osseointegration of the implant and to increase bone-to-implant contact. Although introduction of rough surfaces was able to overcome a lot of limitations that presented with machined surfaces, they are still incapable of ensuring predictable results and guaranteed success. Various techniques in implant surface modifications have been proposed, all aimed at improving bone formation around dental implants. Understanding how surface modification of dental implants can impact osseointegration might help the clinician to maximize the success rate of implants and diminish the complications that can be encountered after their placement. In view of that, this article is aimed at assessing the different surface conditioning techniques available and will present a review of the literature that focuses on the influence of microdesign of dental implants on their osseointegration.
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Stenlund P, Murase K, Stålhandske C, Lausmaa J, Palmquist A. Understanding mechanisms and factors related to implant fixation; a model study of removal torque. J Mech Behav Biomed Mater 2014; 34:83-92. [PMID: 24566379 DOI: 10.1016/j.jmbbm.2014.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 01/28/2014] [Accepted: 02/03/2014] [Indexed: 11/27/2022]
Abstract
Osseointegration is a prerequisite for achieving a stable long-term fixation and load-bearing capacity of bone anchored implants. Removal torque measurements are often used experimentally to evaluate the fixation of osseointegrated screw-shaped implants. However, a detailed understanding of the way different factors influence the result of removal torque measurements is lacking. The present study aims to identify the main factors contributing to anchorage. Individual factors important for implant fixation were identified using a model system with an experimental design in which cylindrical or screw-shaped samples were embedded in thermosetting polymers, in order to eliminate biological variation. Within the limits of the present study, it is concluded that surface topography and the mechanical properties of the medium surrounding the implant affect the maximum removal torque. In addition to displaying effects individually, these factors demonstrate interplay between them. The rotational speed was found not to influence the removal torque measurements within the investigated range.
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Affiliation(s)
- Patrik Stenlund
- Department of Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Box 857, SE-501 15 Borås, Sweden; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Göteborg, Sweden.
| | - Kohei Murase
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Göteborg, Sweden; Department of Mechanical Science and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, 464-8603 Nagoya, Japan
| | | | - Jukka Lausmaa
- Department of Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Box 857, SE-501 15 Borås, Sweden; BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Göteborg, Sweden
| | - Anders Palmquist
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, Göteborg, Sweden; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Box 412, SE-405 30 Göteborg, Sweden
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Huang HL, Tsai MT, Su KC, Li YF, Hsu JT, Chang CH, Fuh LJ, Wu AYJ. Relation between initial implant stability quotient and bone-implant contact percentage: an in vitro model study. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 116:e356-61. [DOI: 10.1016/j.oooo.2012.01.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 01/13/2012] [Accepted: 01/23/2012] [Indexed: 11/29/2022]
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Tabassum A, Meijer GJ, Walboomers XF, Jansen JA. Evaluation of primary and secondary stability of titanium implants using different surgical techniques. Clin Oral Implants Res 2013; 25:487-92. [DOI: 10.1111/clr.12180] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Afsheen Tabassum
- Department of Biomaterials; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
| | - Gert J. Meijer
- Department of Implantology & Periodontology; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
- Department of Oral and Maxillofacial Surgery; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
| | - X. Frank Walboomers
- Department of Biomaterials; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
| | - John A. Jansen
- Department of Biomaterials; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
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Rosa MB, Albrektsson T, Francischone CE, Schwartz Filho HO, Wennerberg A. The influence of surface treatment on the implant roughness pattern. J Appl Oral Sci 2013; 20:550-5. [PMID: 23138742 PMCID: PMC3881788 DOI: 10.1590/s1678-77572012000500010] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 08/20/2012] [Indexed: 12/16/2022] Open
Abstract
An important parameter for the clinical success of dental implants is the formation
of direct contact between the implant and surrounding bone, whose quality is directly
influenced by the implant surface roughness. A screw-shaped design and a surface with
an average roughness of Sa of 1-2 µm showed a better result. The combination of
blasting and etching has been a commonly used surface treatment technique. The
versatility of this type of treatment allows for a wide variation in the procedures
in order to obtain the desired roughness.
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Affiliation(s)
- Marcio Borges Rosa
- Division of Implantology, School of Dentistry, São Leopoldo Mandic University, Campinas, SP, Brazil.
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Kwon YS, Namgoong H, Kim JH, Cho IH, Kim MD, Eom TG, Koo KT. Effect of microthreads on removal torque and bone-to-implant contact: an experimental study in miniature pigs. J Periodontal Implant Sci 2013; 43:41-6. [PMID: 23508085 PMCID: PMC3596634 DOI: 10.5051/jpis.2013.43.1.41] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 02/08/2013] [Indexed: 11/23/2022] Open
Abstract
Purpose The objective of this study was to evaluate the effect of microthreads on removal torque and bone-to-implant contact (BIC). Methods Twelve miniature pigs for each experiment, a total of 24 animals, were used. In the removal torque analysis, each animal received 2 types of implants in each tibia, which were treated with sandblasting and acid etching but with or without microthreads at the marginal portion. The animals were sacrificed after 4, 8, or 12 weeks of healing. Each subgroup consisted of 4 animals, and the tibias were extracted and removal torque was measured. In the BIC analysis, each animal received 3 types of implants. Two types of implants were used for the removal torque test and another type of implant served as the control. The BIC experiment was conducted in the mandible of the animals. The P1-M1 teeth were extracted, and after a 4-month healing period, 3 each of the 2 types of implants were placed, with one type on each side of the mandible, for a total of 6 implants per animal. The animals were sacrificed after a 2-, 4-, or 8-week healing period. Each subgroup consisted of 4 animals. The mandibles were extracted, specimens were processed, and BIC was analyzed. Results No significant difference in removal torque value or BIC was found between implants with and without microthreads. The removal torque value increased between 4 and 8 weeks of healing for both types of implants, but there was no significant difference between 8 and 12 weeks. The percentage of BIC increased between 2 and 4 weeks for all types of implants, but there was no significant difference between 4 and 8 weeks. Conclusions The existence of microthreads was not a significant factor in mechanical and histological stability.
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Affiliation(s)
- Yee-Seo Kwon
- Seoul National University School of Dentistry, Seoul, Korea
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Chanchareonsook N, Tideman H, Feinberg SE, Hollister SJ, Jongpaiboonkit L, Kin L, Jansen JA. Subcutaneous tissue response to titanium, poly(ϵ-caprolactone), and carbonate-substituted hydroxyapatite-coated poly(ϵ-caprolactone) plates: A rabbit study. J Biomed Mater Res A 2013; 101:2258-66. [DOI: 10.1002/jbm.a.34542] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 11/12/2012] [Accepted: 11/19/2012] [Indexed: 11/06/2022]
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Elias CN, Rocha FA, Nascimento AL, Coelho PG. Influence of implant shape, surface morphology, surgical technique and bone quality on the primary stability of dental implants. J Mech Behav Biomed Mater 2012. [PMID: 23182386 DOI: 10.1016/j.jmbbm.2012.10.010] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The primary stability of dental implants has been investigated before, but a study of the influence of implant shape, size and surface morphology (machined, acid etched or anodized), surgical technique (press-fit or undersized) and substrate (natural or simulated bone) on the primary stability of dental implants has not been reported. The present work intends to fill this gap. In this work, six different dental implants were inserted into and removed from synthetic and natural bone while measuring the torque. A total of 255 dental implants with three shapes, four sizes and three surface topographies were inserted into pig rib, PTFE and polyurethane. The implant sites were prepared using straight and tapered drills. The primary stability was estimated from the maximum insertion torque. Comparisons between samples were based on the maximum insertion torque (MIT), the maximum removal torque (MRT) and the torque ratio (TR=MRT/MIT). The insertion torque into pig ribs showed larger dispersion. All parameters (shape, size and surface morphology of the implant, surgical technique and substrate type) were found to have a significant influence on primary stability. The insertion of a tapered implant requires a higher torque than the insertion of a straight implant. Surface treatments improve the primary stability. The influence of the surgical technique is smaller than that of implant size and shape. The highest insertion torque was that of anodized tapered implants inserted into undersized sites. Finally, the primary stability of dental implants is highly dependent on implant design, surgical technique and substrate type.
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Affiliation(s)
- Carlos Nelson Elias
- Biomaterials Laboratory, Instituto Militar de Engenharia, Rio de Janeiro, RJ, Brazil.
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Perrotti V, Palmieri A, Pellati A, Degidi M, Ricci L, Piattelli A, Carinci F. Effect of titanium surface topographies on human bone marrow stem cells differentiation in vitro. Odontology 2012; 101:133-9. [PMID: 22678711 DOI: 10.1007/s10266-012-0067-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Accepted: 04/15/2012] [Indexed: 01/28/2023]
Abstract
Coating characteristics of dental implants such as composition and topography regulate cell response during implant healing. The aim of this study was to assess how surface topography can affect osteogenic differentiation of mesenchymal stem cells (MSCs) by analyzing the expression levels of bone-related genes and MSCs marker. Thirty disk-shaped, commercially pure Grade 2 titanium samples (10 × 2 mm) with 3 different surface topographies (DENTSPLY-Friadent GmbH, Mannheim, Germany) were used in the present study: 10 Ti machined disks (control), 10 Ti sandblasted and acid-etched disks (DPS(®)) and 10 sandblasted and acid-etched disks at high temperature (Plus(®)). Samples were processed for real-time reverse transcription-polymerase chain reaction (RT-PCR) analysis. By comparing machined and Plus(®) disks, quantitative real-time RT-PCR showed a significant reduction of the bone-related genes osteocalcin (BGLAP) and osteoblast transcriptional factor (RUNX2). The comparison between DPS(®) and Plus(®) disks showed a slight induction of all the genes examined (RUNX2, ALPL, COL1A1, COL3A1, ENG, FOSL1, SPP1, and SP7); only the expression of BGLAP remained stable. The present study, demonstrated that implant surface topography affects osteoblast gene expression. Indeed, Plus(®) surface produces an effect on MSCs in the late differentiation stages.
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Affiliation(s)
- Vittoria Perrotti
- Dental School, University of Chieti-Pescara, Via F. Sciucchi 63, 66100, Chieti, Italy
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Ahn SJ, Leesungbok R, Lee SW, Heo YK, Kang KL. Differences in implant stability associated with various methods of preparation of the implant bed: An in vitro study. J Prosthet Dent 2012; 107:366-72. [DOI: 10.1016/s0022-3913(12)60092-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Peak Insertion Torque Correlated to Histologically and Clinically Evaluated Bone Density. IMPLANT DENT 2011; 20:182-91. [DOI: 10.1097/id.0b013e31821662b9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
The long-term clinical success of dental implants is related to their early osseointegration. This paper reviews the different steps of the interactions between biological fluids, cells, tissues, and surfaces of implants. Immediately following implantation, implants are in contact with proteins and platelets from blood. The differentiation of mesenchymal stem cells will then condition the peri-implant tissue healing. Direct bone-to-implant contact is desired for a biomechanical anchoring of implants to bone rather than fibrous tissue encapsulation. Surfaces properties such as chemistry and roughness play a determinant role in these biological interactions. Physicochemical features in the nanometer range may ultimately control the adsorption of proteins as well as the adhesion and differentiation of cells. Nanotechnologies are increasingly used for surface modifications of dental implants. Another approach to enhance osseointegration is the application of thin calcium phosphate (CaP) coatings. Bioactive CaP nanocrystals deposited on titanium implants are resorbable and stimulate bone apposition and healing. Future nanometer-controlled surfaces may ultimately direct the nature of peri-implant tissues and improve their clinical success rate.
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Al-Marshood MM, Junker R, Al-Rasheed A, Al Farraj Aldosari A, Jansen JA, Anil S. Study of the osseointegration of dental implants placed with an adapted surgical technique. Clin Oral Implants Res 2010; 22:753-759. [PMID: 21198894 DOI: 10.1111/j.1600-0501.2010.02055.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To study the osseointegration of dental implants placed with a modified surgical technique in Beagle dogs and to compare it with the conventional method. MATERIALS AND METHODS Dental implants were placed bilaterally in the mandible of Beagle dogs using the press-fit as well as undersized implant bed preparation technique. Micro computer tomography (micro-CT) and histometric methods were used to analyze the bone implant contact and bone volume (BV) around the implants. RESULTS The bone-to-implant contact percentage (BIC: expressed as %), first BIC (1st BIC: expressed in mm), sulcus depth (SD: expressed in mm) and connective tissue thickness (CT: expressed in mm) were analyzed for both groups. The BIC percentage was significantly higher for the undersized installed implants (P=0.0118). Also, a significant difference existed between the undersized and press-fit installed implants for the first screw thread showing bone contact (P=0.0145). There were no significant differences in mucosal response (SD and CT) for both installation procedures. Also, no significant difference was found in the BV, as measured using micro-CT, between the implants placed with an undersized technique (59.3 ± 4.6) compared with the press-fit implants (56.6 ± 4.3). CONCLUSION From the observations of the study, it can be concluded that an undersized implant bed can enhance the implant-bone response.
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Affiliation(s)
- Maysa M Al-Marshood
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Rudiger Junker
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Abdulaziz Al-Rasheed
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Abdullah Al Farraj Aldosari
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - John A Jansen
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Sukumaran Anil
- Dental Implant and Osseointegration Research Chair (DIORC), College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The NetherlandsDepartment of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi ArabiaDepartment of Prosthetic Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Tabassum A, Meijer GJ, Frank Walboomers X, Jansen JA. Biological limits of the undersized surgical technique: a study in goats. Clin Oral Implants Res 2010; 22:129-34. [DOI: 10.1111/j.1600-0501.2010.02016.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Stübinger S, Biermeier K, Bächi B, Ferguson SJ, Sader R, von Rechenberg B. Comparison of Er:YAG laser, piezoelectric, and drill osteotomy for dental implant site preparation: A biomechanical and histological analysis in sheep. Lasers Surg Med 2010; 42:652-61. [DOI: 10.1002/lsm.20944] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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43
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Campanha BP, Gallina C, Geremia T, Loro RCD, Valiati R, Hübler R, de Oliveira MG. Low-Level Laser Therapy for Implants Without Initial Stability. Photomed Laser Surg 2010; 28:365-9. [DOI: 10.1089/pho.2008.2429] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Clóvis Gallina
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Tomás Geremia
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | | | - Renato Valiati
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Roberto Hübler
- School of Physics, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
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44
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In vivo bone response and mechanical evaluation of electrosprayed CaP nanoparticle coatings using the iliac crest of goats as an implantation model. Acta Biomater 2010; 6:2227-36. [PMID: 19944782 DOI: 10.1016/j.actbio.2009.11.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 11/20/2009] [Accepted: 11/23/2009] [Indexed: 01/11/2023]
Abstract
Recent trends in clinical implantology include the use of endosseous dental implant surfaces embellished with nano-sized modifications. The current study was initiated to evaluate the mechanical properties, as well as the potential beneficial effects, of electrosprayed CaP nanoparticle-coated (nano-CaP) implants on the in vivo osteogenic response, compared with grit-blasted, acid-etched (GAE) implant surfaces as controls. For this purpose nano-CaP coatings were deposited on cylindrical screw-type (St) implants and implanted bilaterally into the iliac crest of goats for 6weeks. In addition to histological and histomorphometrical analyses, insertion torque and removal torque values were measured on implant placement and retrieval, respectively. The present study showed similar insertion and removal torque values for nano-CaP-coated and GAE control implants, with no statistically significant increase in torque value during the implant period for either group. With regard to bone-implant contact and peri-implant bone volume, no significant differences were found between nano-CaP-coated and GAE implants after 6weeks implantation. In conclusion, this study has demonstrated that in situations in which implants are placed in a non-compromised situation using a standard press fit implantation strategy the performance of electrosprayed nano-CaP coatings is comparable with GAE implants, both with respect to implant fixation and bone healing response.
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d'Avila S, dos Reis LD, Piattelli A, Aguiar KCS, de Faveri M, Borges FL, Iezzi G, Oliveira NTC, de G. Cardoso LA, Shibli JA. Impact of Smoking on Human Bone Apposition at Different Dental Implant Surfaces: A Histologic Study in Type IV Bone. J ORAL IMPLANTOL 2010; 36:85-90. [DOI: 10.1563/aaid-joi-d-09-00018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
Smoking has adverse effects on peri-implant bone healing and can cause bone loss around successfully integrated implants placed on type IV bone. This study evaluated the influence of implant surface topography of microimplants retrieved from posterior maxilla of smokers after 2 months of unloaded healing. Seven partially edentulous patients received 2 microimplants (machined and sandblasted acid-etched surface) each during conventional implant surgery. Histometric evaluation showed that the mean bone to implant contact was 10.40 ± 14.16% and 22.19 ± 14.68% to machined and sandblasted acid-etched surfaces, respectively (P < .001). These data suggest that the sandblasted acid-etched surface presented better results than the machined surface after a short healing time in smokers.
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Abstract
During the installation of implants, osteogenic bone particles are translocated along the surface. These particles may contribute to peri-implant bone healing. Based on this phenomenon, it is hypothesized that implants placed with undersized drilling, besides showing higher primary-implant stability, also enhance the amount and osteogenic responses of these bone particles. Biocomp® implants were inserted into bicortical fresh-cadaver bone by a press-fit or an undersized surgical technique, and peak-insertion torque values (ITV) were measured. After explantation, the implants were incubated in culture medium up to 24 days. Histology, bone-implant contact (BIC), micro-CT, scanning electron microscopy (SEM), and calcium (Ca) measurements were performed. ITV were significantly higher for implants placed with an undersized technique. Moreover, histology, BIC, micro-CT, SEM, and Ca measurements confirmed the presence of more bone-like tissue on implants inserted with an undersized technique. The undersized surgical technique not only results in higher primary-implant stability, but also induces more translocated bone particles, thus having a positive influence on the osteogenic response.
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Lee DH, Ku Y, Rhyu IC, Hong JU, Lee CW, Heo MS, Huh KH. A clinical study of alveolar bone quality using the fractal dimension and the implant stability quotient. J Periodontal Implant Sci 2010; 40:19-24. [PMID: 20498755 PMCID: PMC2872807 DOI: 10.5051/jpis.2010.40.1.19] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2009] [Accepted: 01/29/2010] [Indexed: 11/29/2022] Open
Abstract
Purpose It has been suggested that primary implant stability plays an essential role in successful osseointegration. Resonance frequency analysis (RFA) is widely used to measure the initial stability of implants because it provides superior reproducibility and non-invasiveness. The purpose of this study is to investigate whether the fractal dimension from the panoramic radiograph is related to the primary stability of the implant as represented by RFA. Methods This study included 22 patients who underwent dental implant installation at the Department of Periodontology of Seoul National University Dental Hospital. Morphometric analysis and fractal analysis of the bone trabecular pattern were performed using panoramic radiographs, and the implant stability quotient (ISQ) values were measured after implant installation using RFA. The radiographs of 52 implant sites were analyzed, and the ISQ values were compared with the results from the morphometric analysis and fractal analysis. Results The Pearson correlation showed a linear correlation between the ISQ values of RFA and the parameters of morphometric analysis but not of statistical significance. The fractal dimension had a linear correlation that was statistically significant. The correlation was more pronounced in the mandible. Conclusions In conclusion, we suggest that the fractal dimension acquired from the panoramic radiograph may be a useful predictor of the initial stability of dental implants.
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Affiliation(s)
- Dae-Hyun Lee
- Department of Periodontology and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
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Tabassum A, Meijer GJ, Wolke JGC, Jansen JA. Influence of surgical technique and surface roughness on the primary stability of an implant in artificial bone with different cortical thickness: a laboratory study. Clin Oral Implants Res 2010; 21:213-20. [DOI: 10.1111/j.1600-0501.2009.01823.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Schouten C, van den Beucken JJ, de Jonge LT, Bronkhorst EM, Meijer GJ, Spauwen PH, Jansen JA. The effect of alkaline phosphatase coated onto titanium alloys on bone responses in rats. Biomaterials 2009; 30:6407-17. [DOI: 10.1016/j.biomaterials.2009.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Accepted: 08/01/2009] [Indexed: 11/28/2022]
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Sul YT, Jönsson J, Yoon GS, Johansson C. Resonance frequency measurements in vivoand related surface properties of magnesium-incorporated, micropatterned and magnesium-incorporated TiUnite ®, Osseotite ®, SLA ®and TiOblast ®implants. Clin Oral Implants Res 2009; 20:1146-1155. [DOI: 10.1111/j.1600-0501.2009.01767.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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