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Matschke J, Farahzadi S, Sembdner P, Holtzhausen S, Kroschwald L, Korn P, Schröder TA, Keil C, Paetzold-Byhain K, Lauer G, Franke A. A cross-sectional study of the anatomy of the jaws of a central-European caucasian population using cone beam computer tomography as a prerequisite for designing pre-formed calcium phosphate cement scaffolds. Ann Anat 2024; 254:152270. [PMID: 38679148 DOI: 10.1016/j.aanat.2024.152270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/04/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
PURPOSE This study aims to measure the cortical and cancellous bone thickness in the upper and lower jaws, serving as a data template for developing pre-defined calcium phosphate cement primary implant forms. These measurements are crucial for creating a biphasic scaffold. METHODS Forty complete jaws were assessed for cortical bone shape and thickness using statistical analysis and specific software tools. Sex and age were considered, and four groups were created. RESULTS The cumulative thickness of the cortical layer varied from region to region. In both the upper and lower jaws, the cortical layer in the molar region was significantly thicker than in the frontal region. Within the alveolar process, cortical thickness increases with distance from the alveolar crest on both sides. The oral side of the lower jaw is significantly thicker than the vestibular side. For the upper jaw, no significant differences between the oral and vestibular sides were found in this study. Additionally, it is noteworthy that men have a significantly thicker cortical layer than women. Regarding age, no significant overall differences were found. CONCLUSION Mathematical analysis of anatomical forms using polynomial functions improves understanding of jaw anatomy. This approach facilitates the design of patient-specific scaffold structures, minimizing the need for costly and time-consuming planning and enabling more efficient implementation of optimal therapy.
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Affiliation(s)
- Jan Matschke
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany.
| | - Samaneh Farahzadi
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Philipp Sembdner
- Institute of Machine Elements and Machine Design, Chair of Virtual Product Development, Technische Universität Dresden, Dresden 01062, Germany
| | - Stefan Holtzhausen
- Institute of Machine Elements and Machine Design, Chair of Virtual Product Development, Technische Universität Dresden, Dresden 01062, Germany
| | - Lysann Kroschwald
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Paula Korn
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Tom Alexander Schröder
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Christiane Keil
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany; Department of Orthodontics, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Kristin Paetzold-Byhain
- Institute of Machine Elements and Machine Design, Chair of Virtual Product Development, Technische Universität Dresden, Dresden 01062, Germany
| | - Günter Lauer
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
| | - Adrian Franke
- Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus" Dresden, Technische Universität Dresden, Dresden 01307, Germany
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V M, Chirom B, Gunadhar K, Priyadarshini S, Nongthombam RS, P M. The Accuracy of Casts Obtained Using Different Impression Techniques and Impression Materials in Combined Parallel and Angulated Implants: An In Vitro Study. Cureus 2024; 16:e59193. [PMID: 38807829 PMCID: PMC11131036 DOI: 10.7759/cureus.59193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2024] [Indexed: 05/30/2024] Open
Abstract
Aim The aim of this in vitro study was to evaluate and compare the accuracy of casts made from two elastomeric impression materials (polyvinyl siloxane (PVS) and vinylsiloxanether (VSE)) using different impression techniques on parallel and angulated implants. Materials and methods The reference model was fabricated using auto-polymerizing acrylic resin on which three implant analogs were placed of which two were parallel to each other and the third at 20-degree mesial angulation. A total of 60 impressions were made of which 30 were by using PVS and 30 by VSE. For each material, 10 impressions were made by closed tray technique, 10 by open tray technique and 10 by open tray with sandblasting and adhesive coating of the impression copings technique. The inter-analog distances of the casts obtained were evaluated and compared with the reference model by a vision measuring machine. Data were analyzed using analysis of variance (ANOVA), Tukey's Honest Significant Difference (HSD) post hoc and independent samples t-test. Results When the inter-analog distances of the duplicate casts were compared with the reference model, the mean error rates for parallel implants decreased in the order of closed tray technique, open tray technique and open tray with sandblasting and adhesive coating of the impression copings technique for both PVS and VSE impression materials. Similarly, the same order was observed for angulated implants for both impression materials. Using the closed tray technique, there was no statistically significant difference in the accuracy of the cast between the two materials for parallel implants (P = 0.525) and also no significant difference between the two materials for angulated implants (P = 0.307). Similarly, there was no statistically significant difference in the accuracy of the cast between the two materials for parallel implants (P = 0.455) and also no significant difference between the two materials for angulated implants (P = 0.519) using the open tray technique. Whereas for the open tray with sandblasting and adhesive coating of the impression copings technique, VSE produced a more accurate cast than PVS for parallel implants and was statistically significant (P = 0.033); however, there was no significant difference between the two materials for angulated implants (P = 0.375). Conclusion For parallel implants, VSE by an open tray with sandblasting and adhesive coating of the impression copings technique produced a more accurate cast than PVS. For angulated implants, there was no significant difference between the two materials and it was only the technique that significantly affected the accuracy of the cast.
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Affiliation(s)
- Menaga V
- Prosthodontics and Crown and Bridge, Thai Moogambigai Dental College and Hospital, Chennai, IND
| | - Babina Chirom
- Prosthodontics and Crown and Bridge, Regional Institute of Medical Sciences, Imphal, Imphal, IND
| | - Kangjam Gunadhar
- Conservative Dentistry and Endodontics, Jawaharlal Nehru Institute of Medical Sciences (JNIMS), Imphal, IND
| | | | - Rajesh S Nongthombam
- Prosthodontics and Crown and Bridge, Regional Institute of Medical Sciences, Imphal, Imphal, IND
| | - Manikandan P
- Pedodontics, Sri Ramachandra Dental College, Chennai, IND
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Marin E, Lanzutti A. Biomedical Applications of Titanium Alloys: A Comprehensive Review. MATERIALS (BASEL, SWITZERLAND) 2023; 17:114. [PMID: 38203968 PMCID: PMC10780041 DOI: 10.3390/ma17010114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
Titanium alloys have emerged as the most successful metallic material to ever be applied in the field of biomedical engineering. This comprehensive review covers the history of titanium in medicine, the properties of titanium and its alloys, the production technologies used to produce biomedical implants, and the most common uses for titanium and its alloys, ranging from orthopedic implants to dental prosthetics and cardiovascular devices. At the core of this success lies the combination of machinability, mechanical strength, biocompatibility, and corrosion resistance. This unique combination of useful traits has positioned titanium alloys as an indispensable material for biomedical engineering applications, enabling safer, more durable, and more efficient treatments for patients affected by various kinds of pathologies. This review takes an in-depth journey into the inherent properties that define titanium alloys and which of them are advantageous for biomedical use. It explores their production techniques and the fabrication methodologies that are utilized to machine them into their final shape. The biomedical applications of titanium alloys are then categorized and described in detail, focusing on which specific advantages titanium alloys are present when compared to other materials. This review not only captures the current state of the art, but also explores the future possibilities and limitations of titanium alloys applied in the biomedical field.
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Affiliation(s)
- Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8585, Japan
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
- Department Polytechnic of Engineering and Architecture, University of Udine, 33100 Udine, Italy
- Biomedical Research Center, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8585, Japan
| | - Alex Lanzutti
- Department Polytechnic of Engineering and Architecture, University of Udine, 33100 Udine, Italy
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Vardić A, Puljak L, Galić T, Viskić J, Kuliš E, Poklepović Peričić T. Heterogeneity of outcomes in randomized controlled trials on implant prosthodontic therapy is hindering comparative effectiveness research: meta-research study. BMC Oral Health 2023; 23:908. [PMID: 37993826 PMCID: PMC10666438 DOI: 10.1186/s12903-023-03658-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 11/12/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Consistency in outcomes across clinical trials allows for comparing and combining results from different studies. A core outcome set (COS), representing a minimally agreed standardized group of outcomes that should be monitored and measured through research in a specific field of medicine, is not yet available for trials in implant prosthodontic (dental implant) therapy. This meta-research study aimed to analyze outcomes used in clinical trials on implant prosthodontic therapy. METHODS We searched the Cochrane Oral Health Group (COHG) register to identify systematic reviews of interventions in implant prosthodontic therapy published by October 2023. From the randomized controlled trials (RCTs) included in the relevant reviews, we extracted data on the characteristics of the included trials and the outcomes used. We categorized outcomes into domains. RESULTS From 182 systematic reviews in the COHG register, we included 11 systematic reviews on dental implant therapy. The reviews included 117 unique RCTs with 4725 participants, published from 1995 to 2020, which analyzed 74 different outcomes. Using different definitions, implant failure was analyzed in 73 RCTs. Seventeen RCTs did not define implant failure. Failure was most often (30 RCTs) followed up for one year. Only one RCT assessed implant failure after five years. Trials used 17 definitions of implant failure, while 17 trials did not report on the criteria of implant failure. Complications were analyzed in 48 RCTs, although they were not clearly defined in 12 RCTs. Failure of prosthodontic supra-structure was analyzed in 74 RCTs, with definitions of failure and criteria not clearly defined in 44 RCTs. Trials considered adverse events, peri-implant tissue health, patient attitudes, and other outcomes, including cost, aesthetics, or procedure duration. These outcomes were often different between trials. Twenty-six outcomes were used only once per study. CONCLUSIONS Clinical trials in implant prosthodontics used different outcomes, different definitions of outcomes and used different times to monitor them. Standardization of outcomes is necessary to allow comparability and evidence synthesis about the effectiveness of implant prosthodontic therapy.
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Affiliation(s)
- Ante Vardić
- Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
| | - Livia Puljak
- Center for Evidence-Based Medicine and Health Care, Catholic University of Croatia, Zagreb, Croatia.
| | - Tea Galić
- Department of Prosthodontics, Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
| | - Joško Viskić
- Department of Fixed Prosthodontics, University of Zagreb School of Dental Medicine, Zagreb, Croatia
| | - Ena Kuliš
- Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
| | - Tina Poklepović Peričić
- Department of Prosthodontics, Study of Dental Medicine, University of Split School of Medicine, Split, Croatia
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Stavropoulos A, Bertl K, Isidor F, Vult von Steyern P. Implantoplasty and the risk of fracture of narrow implants with advanced bone loss: A laboratory study. Clin Oral Implants Res 2023; 34:1038-1046. [PMID: 37464268 DOI: 10.1111/clr.14132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/03/2023] [Accepted: 07/05/2023] [Indexed: 07/20/2023]
Abstract
OBJECTIVES To assess the impact of implantoplasty (IP) on maximum implant failure strength of narrow diameter implants of different type/design and material, with simulated advanced bone loss. MATERIALS AND METHODS Narrow, parallel-walled implants (3.3 mm in diameter × 10 mm long) with an internal connection of different type/design [bone level (BL), tissue level (TL)] and material [Titanium grade IV (Ti), Titanium-Zirconium alloy (TiZr)] from one specific manufacturer were used. Half of the implants were subjected to IP in their coronal 5 mm; the remaining were used as controls (seven implants per group). Dynamic loading prior to maximum load strength testing was included. RESULTS During dynamic loading, the fracture rate of BL implants was low and independent of IP, while that of TL implants increased significantly with IP compared with controls (p = .001). Maximum implant failure strength reduction (in %) due to IP, was 1.3%-25.4%; TiZr BL implants were least affected. Implants subjected to IP compared to those without IP as well as TL implants compared to BL implants showed a significantly lower maximum implant failure strength (p < .002); implant material was not significant (p = .845). CONCLUSIONS Based on data from implants of one specific manufacturer, IP has a significant negative impact on the fracture strength of narrow implants suffering from advanced peri-implantitis. TL implants have been more severely affected compared to BL implants and presented an increased risk for failure during normal chewing forces. In addition, this negative impact of IP on TL implants was independent of the implant material (i.e., Ti or TiZr). CLINICAL RELEVANCE Narrow single TL implants with advanced horizontal bone loss (e.g., 5 mm), when subjected to IP, appear to have an increased fracture risk during normal function.
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Affiliation(s)
- Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Kristina Bertl
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden
- Department of Periodontology, Dental Clinic, Faculty of Medicine, Sigmund Freud University Vienna, Vienna, Austria
| | - Flemming Isidor
- Section for Prosthetic Dentistry, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Per Vult von Steyern
- Nordic Institute of Dental Materials, NIOM, Oslo, Norway
- Department of Dental Materials, Faculty of Odontology, University of Malmö, Malmö, Sweden
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De Stefano M, Lanza A, Sbordone L, Ruggiero A. Stress-strain and fatigue life numerical evaluation of two different dental implants considering isotropic and anisotropic human jaw. Proc Inst Mech Eng H 2023; 237:1190-1201. [PMID: 37667892 DOI: 10.1177/09544119231193879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Dental prostheses are currently a valid solution for replacing potential missing tooth or edentulism clinical condition. Nevertheless, the oral cavity is a dynamic and complex system: occlusal loads, external agents, or other unpleasant events can impact on implants functionality and stability causing a future revision surgery. One of the failure origins is certainly the dynamic loading originated from daily oral activities like eating, chewing, and so on. The aim of this paper was to evaluate, by a numerical analysis based on Finite Elements Method (FEM), and to discuss in a comparative way, firstly, the stress-strain of two different adopted dental implants and, subsequently, their fatigue life according to common standard of calculations. For this investigation, the jawbone was modeled accounting for either isotropic or anisotropic behavior. It was composed of cortical and cancellous regions, considering it completely osseointegrated with the implants. The impact of implants' fixture design, loading conditions, and their effect on the mandible bone was finally investigated, on the basis of the achieved numerical results. Lastly, the life cycle of the investigated implants was estimated according to the well-established theories of Goodman, Soderberg, and Gerber by exploiting the outcomes obtained by the numerical simulations, providing interesting conclusions useful in the dental practice.
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Affiliation(s)
- Marco De Stefano
- Department of Industrial Engineering, University of Salerno, Fisciano, Italy
| | - Antonio Lanza
- Department of Medicine, Surgery and Dentistry "Schola Medica Salernitana," University of Salerno, Baronissi, Italy
| | - Ludovico Sbordone
- Department of Medicine and Health Sciences, University of Molise, V Campobasso, Italy
| | - Alessandro Ruggiero
- Department of Industrial Engineering, University of Salerno, Fisciano, Italy
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Borzangy S, Alqutaibi AY, Krsoum M, Aljohani R, Qadri O. Evaluation of Implant Placement Risk Levels in Partially Edentulous Patients Using Cone Beam Computed Tomography. Cureus 2023; 15:e47893. [PMID: 38034143 PMCID: PMC10682683 DOI: 10.7759/cureus.47893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2023] [Indexed: 12/02/2023] Open
Abstract
OBJECTIVE This study aimed to evaluate the implant placement risk levels in partially edentulous patients using cone beam computed tomography (CBCT) and implant planning software. MATERIALS AND METHODS A total of 101 CBCT scans of partially edentulous patients were included. Evaluations of jawbone anatomy, vital structures' proximity, and the risk of inferior alveolar nerve injury with esthetic considerations were done on CBCT images using implant surgery software (Blue Sky Plan 4; Blue Sky Bio, Grayslake, IL). RESULTS A total of 101 patients with 106 edentulous sites were examined. The mean ridge height of the non-esthetic zone was 10 mm and 14.4 mm in the maxilla and mandible, respectively. The period of edentulousness significantly affected the risk of placing implants in the non-esthetic zone (P<.05). The relation between gender and mandibular canal identification was significant (P<.01). A higher risk of implant placement is associated with a more extended period of edentulousness. The preoperative assessment revealed that the mandibular canal could be identified more easily in females than males; thus, nerve injury could be avoided. However, age had no associated effect. CONCLUSION Age has no associated effect on the implant placement risk levels for partially edentulous patients during dental implant planning. A higher risk of implant placement is associated with a more extended period of edentulousness. Mandibular canal identification during virtual preoperative assessment was higher in females.
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Affiliation(s)
- Sary Borzangy
- Substitutive Dental Sciences, College of Dentistry, Taibah University, Madinah, SAU
| | | | - Majid Krsoum
- Dentistry, King Abdulaziz Medical City, Ministry of National Guard - Health Affairs, Jeddah, SAU
| | - Rana Aljohani
- Substitutive Dental Sciences, College of Dentistry, Taibah University, Madinah, SAU
| | - Osama Qadri
- Dentistry, Magrabi Dental Center, Madinah, SAU
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Ebadi M, Miresmaeili A, Shojaei S, Farhadi S, Rajabi S. Isolation and characterization of apical papilla cells from root end of human third molar and their differentiation into cementoblast cells: an in vitro study. Biol Proced Online 2023; 25:2. [PMID: 36690939 PMCID: PMC9869574 DOI: 10.1186/s12575-023-00190-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 01/11/2023] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Periodontal regeneration, treatment of periodontal-related diseases and improving the function of implants are global therapeutic challenges. The differentiation of human stem cells from apical papilla into cementoblasts may provide a strategy for periodontitis treatment. This study aimed to evaluate the differentiation of primary human stem cells apical papilla (hSCAPs) to cementoblast cells. MATERIAL AND METHODS SCAPs cells were isolated from human third molar and then incubated for 21 days in a differentiation microenvironment. Alkaline phosphatase (ALP) and Alizarin red S staining assays were performed to evaluate the calcium deposition and formation of hydroxyapatite in the cultured hSCAPs microenvironment. Real-time polymerase chain reaction (RT-PCR) assay was performed for cementum protein 1 (CEMP1), collagen type I (COL1), F-Spondin (SPON1), osteocalcin (OCN), and osteopontin (OPN) as specific markers of cementoblasts and their progenitors. RESULTS ALP phosphatase activity in day 21 of treatment demonstrated a significant increase in ALP compared to the control. Alizarin red S staining assay showed that the differentiated hSCAPs offered a great amount of calcium deposition nodules compared to the control. The increased expression level of CEMP1, OCN, OPN, COL1 and Spon1 was observed in days 7, 14 and 21 compared to the control, while greatest expression level was observed in day 21. CONCLUSION In conclusion, the differentiation microenviroment is convenient and useful for promoting the differentiation of hSCAPs into cementoblast.
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Affiliation(s)
- Morvarid Ebadi
- grid.411463.50000 0001 0706 2472Department of Biomedical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Amirfarhang Miresmaeili
- grid.411950.80000 0004 0611 9280Orthodontic Department of Hamadan University of Medical Sciences and Hamadan Dental Research Centre, Hamadan, Iran
| | - Shahrokh Shojaei
- grid.411463.50000 0001 0706 2472Department of Biomedical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran ,grid.411463.50000 0001 0706 2472Stem Cells Research Center, Tissue Engineering and Regenerative Medicine Institute, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Sareh Farhadi
- grid.411463.50000 0001 0706 2472Department of Oral & Maxillofacial Pathology, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Sarah Rajabi
- grid.419336.a0000 0004 0612 4397Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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Qu C, Luo F, Hong G, Wan Q. Effects of photobiomodulation therapy (PBMT) on implant stability and postoperative recovery: a systematic review and meta-analysis. Br J Oral Maxillofac Surg 2022; 60:e712-e721. [DOI: 10.1016/j.bjoms.2022.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 01/26/2022] [Indexed: 10/19/2022]
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10
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Gaafar MS, Yakout SM, Barakat YF, Sharmoukh W. Electrophoretic deposition of hydroxyapatite/chitosan nanocomposites: the effect of dispersing agents on the coating properties. RSC Adv 2022; 12:27564-27581. [PMID: 36276043 PMCID: PMC9516373 DOI: 10.1039/d2ra03622c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 09/08/2022] [Indexed: 11/23/2022] Open
Abstract
In this study, electrophoretic deposition (EPD) was used for the coating on titanium (Ti) substrate with a composite of hydroxyapatite (HA)-chitosan (CS) in the presence of dispersing agents such as polyvinyl butyral (PVB), polyethylene glycol (PEG), and triethanolamine (TEA). The materials were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), zeta potential, and Fourier transform infrared (FT-IR) spectroscopy. The addition of PVB, PEG, and TEA agents improved the development of Ti coating during the EPD process. These additives increased the suspension stability and promoted the formation of uniform and compact HA/CS nanocomposite coatings on Ti substrates. The electrochemical polarization tests (e.g., potentiodynamic test) of the substrate with and without coating were investigated. Data analysis showed high corrosion resistance of Ti substrate coated with the HA/CS NP composite. The corrosion potentials displayed a shift toward positive values indicating the increase in the corrosion resistance of Ti after coating. In addition to measuring calcium ion release at various pH values and contact times at a biological pH value of 5.5, the stabilities of Ti substrates coated with HA/CS and different dispersing agents were also evaluated. Ti substrates with high anticorrosion properties may have a new potential application in biomedicine. Electrophoretic deposition was used for coating of titanium substrate with a composite of hydroxyapatite (HA)-chitosan (CS) in the presence of polyvinyl butyral (PVB), polyethylene glycol (PEG), and triethanolamine (TEA).![]()
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Affiliation(s)
- M. S. Gaafar
- Department of Chemical Engineering, Tabbin Institute for Metallurgical Studies (TIMS), PO Box: 109 Helwan, 11421 Cairo, Egypt
| | - S. M. Yakout
- Inorganic Chemistry Department, National Research Centre, Tahrir St, Dokki, Giza 12622, Egypt
| | - Y. F. Barakat
- Department of Chemical Engineering, Tabbin Institute for Metallurgical Studies (TIMS), PO Box: 109 Helwan, 11421 Cairo, Egypt
| | - W. Sharmoukh
- Inorganic Chemistry Department, National Research Centre, Tahrir St, Dokki, Giza 12622, Egypt
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11
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Di Stefano DA, Arosio P, Capparè P, Barbon S, Gherlone EF. Stability of Dental Implants and Thickness of Cortical Bone: Clinical Research and Future Perspectives. A Systematic Review. MATERIALS 2021; 14:ma14237183. [PMID: 34885335 PMCID: PMC8658728 DOI: 10.3390/ma14237183] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 11/12/2021] [Accepted: 11/22/2021] [Indexed: 12/30/2022]
Abstract
Dental surgery implantation has become increasingly important among procedures that aim to rehabilitate edentulous patients to restore esthetics and the mastication ability. The optimal stability of dental implants is correlated primarily to the quality and quantity of bone. This systematic literature review describes clinical research focusing on the correlation between cortical bone thickness and primary/secondary stability of dental fixtures. To predict successful outcome of prosthetic treatment, quantification of bone density at the osteotomy site is, in general, taken into account, with little attention being paid to assessment of the thickness of cortical bone. Nevertheless, local variations in bone structure (including cortical thickness) could explain differences in clinical practice with regard to implantation success, marginal bone resorption or anchorage loss. Current knowledge is preliminarily detailed, while tentatively identifying which inconclusive or unexplored aspects merit further investigation.
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Affiliation(s)
- Danilo Alessio Di Stefano
- Dental School, Vita-Salute University IRCCS San Raffaele, 20132 Milan, Italy; (D.A.D.S.); (E.F.G.)
- Private Practitioner, 20132 Milan, Italy
| | | | - Paolo Capparè
- Department of Dentistry, Vita-Salute University IRCCS San Raffaele, 20132 Milan, Italy
- Correspondence: ; Tel.: +39-0226433619
| | - Silvia Barbon
- Section of Human Anatomy, Department of Neurosciences, Padua University, 35121 Padua, Italy;
| | - Enrico Felice Gherlone
- Dental School, Vita-Salute University IRCCS San Raffaele, 20132 Milan, Italy; (D.A.D.S.); (E.F.G.)
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12
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Zhang A, Liu Y, Liu X, Cai X, Sun L, Li T. Could the socket shield technique be better than conventional immediate implantation? A meta-analysis. Clin Oral Investig 2021; 26:1173-1182. [PMID: 34783912 DOI: 10.1007/s00784-021-04266-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/07/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The purpose of this study was to evaluate whether the clinical outcome of socket shield technique (SST) is superior to that of conventional immediate implantation (CII). MATERIALS AND METHOD Five electronic databases (PubMed, Cochrane, Web of Science, CNKI, and Google Scholar) were searched to identify randomized controlled trials up to June 31, 2021. Five evaluation indexes were extracted, namely, buccal bone resorption at the horizontal and vertical levels (BBH and BBV), the soft tissue recession assessed by pink evaluation scores (PES), patient satisfaction (PS), ISQ, and the success rate of implantation (SRI), to compare the superiority between SST and CII operations. All data analyses were performed using Review Manager (version 5.4). RESULTS Ten studies were included in this review. The sample included 388 implants, with 194 in the SST group and 194 in the CII group. Compared with the CII group, the SST group had a lower BBH and BBV (standardized mean difference (SMD), - 1.77; 95% CI, - 2.26 to - 1.28; P < 0.00001 and SMD, - 1.85; 95% CI, - 2.16 to 1.54; P < 0.00001), higher PES improvement (SMD, 2.27; 95% CI, 1.59 to 2.95; P < 0.00001), higher rate of PS (OR, 3.12; 95% CI, 1.08 to 9.04; P = 0.04), and slightly higher ISQ (SMD, 0.71; 95% CI, 0.28 to 1.15; P = 0.001). CONCLUSIONS Compared with CII, SST could be a better option for esthetic area implantation, but evaluation of its long-term success is still needed. CLINICAL RELEVANCE By comparing and analyzing the operations of immediate implant in esthetic zone, we could choose SST to effectively alleviate the absorption of bone tissue and improve the contouring of soft tissue after anterior teeth extraction, so as to achieve a more stable and superior clinical outcomes of implant in esthetic zone.
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Affiliation(s)
- Aobo Zhang
- Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, 100081, China.,Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions, Chinese Academy of Medical Sciences (2019RU034), Beijing, 100081, China
| | - Yuping Liu
- School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, 271016, Shandong, China
| | - Xiaoxiao Liu
- Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, 100081, China.,Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions, Chinese Academy of Medical Sciences (2019RU034), Beijing, 100081, China
| | - XinJia Cai
- Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, 100081, China.,Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions, Chinese Academy of Medical Sciences (2019RU034), Beijing, 100081, China
| | - Lisha Sun
- Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions, Chinese Academy of Medical Sciences (2019RU034), Beijing, 100081, China. .,Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, 100081, China. .,National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, 100081, China. .,, No.22 Zhongguancun South Avenue, Haidian District, 100081, Beijing, People's Republic of China.
| | - Tiejun Li
- Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, 100081, China. .,, No.22 Zhongguancun South Avenue, Haidian District, 100081, Beijing, People's Republic of China.
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13
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Ferreira PW, Nogueira PJ, de Araújo Nobre MA, Guedes CM, Salvado F. Impact of Mechanical Complications on Success of Dental Implant Treatments: A Case-Control Study. Eur J Dent 2021; 16:179-187. [PMID: 34587636 PMCID: PMC8890925 DOI: 10.1055/s-0041-1732802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Objective
This study aimed to investigate the impact of mechanical complications on outcome measures for implant dentistry.
Materials and Methods
This case–control study included 282 patients with mechanical complications occurring in fixed prosthetic rehabilitation supported by immediate function implants with external connection (cases) and 282 individuals without mechanical complications (control). Pairing was performed for sex, age (range = 3 years), and follow-up months (range = 11 months). The primary outcome measure was implant survival, while the secondary outcome measures were marginal bone loss and biological complication parameters (peri-implant pathology, soft tissue inflammation, fistula formation, and abscess formation).
Statistical Analysis
Cumulative implant survival was estimated by using life tables. Descriptive statistics with 95% confidence intervals (CI) and inferential statistics (Chi-square test) were performed to evaluate differences between cases and controls. The significance level was set at 5%.
Results
The average follow-up duration was 8.5 years. Mechanical complications included prosthetic fracture (
n
= 159), abutment loosening (
n
= 89), prosthetic screw loosening (
n
= 20), milled abutment (
n
= 12), milled prosthetic screw (
n
= 1), and decemented crown (
n
= 1). Implant failure occurred in one patient from the control group, with survival rates of 100 and 99.6% for cases and controls, respectively (
p
= 0.317). The average marginal bone loss was 1.72 (95% confidence interval [CI]: 1.60–1.84) for cases and 1.55 (95% CI: 1.45–1.65) for controls (
p
= 0.068). Biological complications were observed in 90 patients, with significant differences between cases (
n
= 54) and controls (
n
= 36;
p
= 0.038).
Conclusion
Mechanical complications did not significantly influence survival or marginal bone loss; nevertheless, there is a need for studies with longer follow-up duration. Mechanical complications also significantly influence the incidence of biological complications.
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Affiliation(s)
- Patrícia W Ferreira
- Unidade de Epidemiologia, Instituto de Medicina Preventiva e Saúde Pública, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa, Portugal
| | - Paulo J Nogueira
- Unidade de Epidemiologia, Instituto de Medicina Preventiva e Saúde Pública, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa, Portugal
| | - Miguel A de Araújo Nobre
- Unidade de Epidemiologia, Instituto de Medicina Preventiva e Saúde Pública, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa, Portugal.,Research, Development and Education Department, Maló Clinic, Avenida dos Combatentes, Lisboa, Portugal.,Clínica Universitária de Estomatologia, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa, Portugal
| | - Carlos Moura Guedes
- Prosthodontics Department, Maló Clinic, Avenida dos Combatentes, Lisboa, Portugal
| | - Francisco Salvado
- Clínica Universitária de Estomatologia, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa, Portugal.,Centro de Investigação Integrada Egas Moniz, Campus Universitário, Quinta da Granja, Caparica
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14
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Feng Y, Fan J, Tao B, Wang S, Mo J, Wu Y, Liang Q, Chen X. An image-guided hybrid robot system for dental implant surgery. Int J Comput Assist Radiol Surg 2021; 17:15-26. [PMID: 34449036 DOI: 10.1007/s11548-021-02484-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 08/13/2021] [Indexed: 11/24/2022]
Abstract
PURPOSE Dental implant surgery is an effective method for remediating the loss of teeth. Robot is expected to increase the accuracy of dental implant surgery. However, most of them are industrial serial robot, with low stiffness and non-unique inverse kinematic solution, which may reduce the success rate and safety of robotic surgery. Compared to serial robot, parallel robot is more stiffness and has unique inverse kinematic. However, its workspace is small, which may not meet surgical requirements. Therefore, a novel hybrid robot dedicated to dental implant is proposed. METHODS The hybrid robot is composed of three translation joints, two revolute joints, and Stewart parallel manipulator. Stewart is used for performing surgical operation, while the joints are used for enlarging the workspace of Stewart. In order to ensure the safety of robot motion, physical human-robot interaction based on a variable admittance controller is applied in the robotic system. In addition, considering the small workspace of Stewart, an optimal model is proposed to minimize the joint movement of Stewart in adjusting the orientation of drill bit. RESULTS Phantom experiments were carried out based on the prototype robot. In the experiments, the optimal model could be solved after 20 iterations, finding an ideal joint configuration. The proposed variable admittance controller could enhance comfort level effectively. The accuracy of robot is evaluated by angle, entry and exit deviation, which are 0.74 ± 0.25°, 0.93 ± 0.28 mm, and 0.96 ± 0.23 mm, respectively. CONCLUSION The phantom experiments validate the functionality of the proposed hybrid robot. The satisfactory performance makes it more widely used in the practical dental implant surgery in the future.
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Affiliation(s)
- Yuan Feng
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China
| | - JiaCheng Fan
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China
| | - BaoXin Tao
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Oral Disease, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, 639, Zhizaoju Road, Shanghai, 200011, China
| | - ShiGang Wang
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China
| | - JinQiu Mo
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China
| | - YiQun Wu
- Department of Second Dental Center, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Oral Disease, Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, 639, Zhizaoju Road, Shanghai, 200011, China
| | - QingHua Liang
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China.
| | - XiaoJun Chen
- School of Mechanical Engineering, Shanghai Jiao Tong University, Room 901, Dongchuan Road 800, Minhang District, Shanghai, 200240, China.
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15
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Guillaume F, Le Cann S, Tengattini A, Törnquist E, Falentin-Daudre C, Albini Lomami H, Petit Y, Isaksson H, Haïat G. Neutron microtomography to investigate the bone-implant interface-comparison with histological analysis. Phys Med Biol 2021; 66. [PMID: 33831846 DOI: 10.1088/1361-6560/abf603] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 04/08/2021] [Indexed: 12/20/2022]
Abstract
Bone properties and especially its microstructure around implants are crucial to evaluate the osseointegration of prostheses in orthopaedic, maxillofacial and dental surgeries. Given the intrinsic heterogeneous nature of the bone microstructure, an ideal probing tool to understand and quantify bone formation must be spatially resolved. X-ray imaging has often been employed, but is limited in the presence of metallic implants, where severe artifacts generally arise from the high attenuation of metals to x-rays. Neutron tomography has recently been proposed as a promising technique to study bone-implant interfaces, thanks to its lower interaction with metals. The aim of this study is to assess the potential of neutron tomography for the characterisation of bone tissue in the vicinity of a metallic implant. A standardised implant with a bone chamber was implanted in rabbit bone. Four specimens were imaged with neutron tomography and subsequently compared to non-decalcified histology to stain soft and mineralised bone tissues, used here as a ground-truth reference. An intensity-based image registration procedure was performed to place the 12 histological slices within the corresponding 3D neutron volume. Significant correlations (p < 0.01) were obtained between the two modalities for the bone-implant contact (BIC) ratio (R = 0.77) and the bone content inside the chamber (R = 0.89). The results indicate that mineralised bone tissue can be reliably detected by neutron tomography. However, theBICratio and bone content were found to be overestimated with neutron imaging, which may be explained by its sensitivity to non-mineralised soft tissues, as revealed by histological staining. This study highlights the suitability of neutron tomography for the analysis of the bone-implant interface. Future work will focus on further distinguishing soft tissues from bone tissue, which could be aided by the adoption of contrast agents.
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Affiliation(s)
- Florian Guillaume
- Département de génie mécanique, École de technologie supérieure, Montréal, Canada.,MSME, CNRS UMR 8208, Univ Paris Est Creteil, Univ Gustave Eiffel, F-94010 Creteil, France
| | - Sophie Le Cann
- MSME, CNRS UMR 8208, Univ Paris Est Creteil, Univ Gustave Eiffel, F-94010 Creteil, France
| | - Alessandro Tengattini
- Institut Laue Langevin, Grenoble, France.,Laboratoire 3SR, Université Grenoble Alpes, Gières, France
| | - Elin Törnquist
- Department of Biomedical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Céline Falentin-Daudre
- LBPS/CSPBAT, UMR CNRS 7244, Institut Galilée, Université Sorbonne Paris Nord, 99 avenue JB Clément 93430- Villetaneuse, France
| | - Hugues Albini Lomami
- MSME, CNRS UMR 8208, Univ Paris Est Creteil, Univ Gustave Eiffel, F-94010 Creteil, France
| | - Yvan Petit
- Département de génie mécanique, École de technologie supérieure, Montréal, Canada
| | - Hanna Isaksson
- Department of Biomedical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Guillaume Haïat
- MSME, CNRS UMR 8208, Univ Paris Est Creteil, Univ Gustave Eiffel, F-94010 Creteil, France
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16
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Murakami H, Igarashi K, Fuse M, Kitagawa T, Igarashi M, Uchibori S, Komine C, Gotouda H, Okada H, Kawai Y. Risk factors for abutment and implant fracture after loading. J Oral Sci 2020; 63:92-97. [PMID: 33311012 DOI: 10.2334/josnusd.20-0443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
PURPOSE Implant component fractures are one of the most serious complications in implant treatment. With a better understanding of the risk factors for fracture in the preoperative, surgery, superstructure, and post-loading phases of implant treatment, low-risk treatment could reduce implant component fractures, leading to a better prognosis. The aim of this study was to clarify the risk factors for abutment and implant fractures that occur after loading, and to perform a retrospective, approximately 10-year follow-up study to explore the risk factors in each treatment phase. METHODS Subjects were fitted with an implant prosthesis between January 2008 and December 2009. In total, 1,126 Ankylos implants in 430 patients were included for analysis. Binary logistic regression analysis was performed to extract factors related to non-fracture and fracture of the abutment or implant as a dependent variable. RESULTS Gender (OR = 3.466, 95% CI 1.296-9.268, P = 0.013), gonial angle (OR = 3.420, 95% CI 1.308-8.945, P = 0.012), and splinting status of the superstructure (OR = 4.456, 95% CI 1.861-10.669, P = 0.001) were identified as significant risk factors. CONCLUSION The risk of fracture is increased in males, especially those with a mandibular angle of less than 120° on panoramic radiographs, and those with a non-splinted superstructure.
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Affiliation(s)
- Hiroshi Murakami
- Department of Fixed Prosthodontics and Oral Implantology, Nihon University School of Dentistry at Matsudo
| | - Kentaro Igarashi
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo
| | - Megumi Fuse
- Liberal Arts (Chemistry), Nihon University School of Dentistry at Matsudo
| | - Tsuyoshi Kitagawa
- Department of Fixed Prosthodontics and Oral Implantology, Nihon University School of Dentistry at Matsudo
| | - Mitsuhiko Igarashi
- Department of Histology, Nihon University School of Dentistry at Matsudo
| | - Satoshi Uchibori
- Department of Fixed Prosthodontics and Oral Implantology, Nihon University School of Dentistry at Matsudo
| | - Chiaki Komine
- Department of Oral Health Science, Division of Laboratory Medicine for Dentistry, Nihon University School of Dentistry at Matsudo
| | - Hiroya Gotouda
- Department of Community Oral Health, Nihon University School of Dentistry at Matsudo
| | - Hiroyuki Okada
- Department of Histology, Nihon University School of Dentistry at Matsudo
| | - Yasuhiko Kawai
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo
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17
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Tran TB, Estrin NE, Saleh MHA, Yoon TYH, Tattan M, Wang HL. Evaluation of length and location of the maxillary sinus intraosseous artery using computerized tomography. J Periodontol 2020; 92:854-862. [PMID: 33107598 DOI: 10.1002/jper.20-0560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/08/2020] [Accepted: 09/20/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND The intraosseous artery is a branch of the posterior superior alveolar artery that supplies the lateral wall of the maxillary sinus. The present study seeks to analyze the location of the intraosseous artery and its site of termination. METHODS Cone beam computed tomography was used to evaluate 200 patients making up 400 maxillary sinuses. The following criteria were measured: (1) the distance of the lower border of the intraosseous artery to the floor of the sinus, (2) the average length of the artery, (3) the diameter of the artery, (4) the site at which the artery terminates at, and (5) the distance of the artery from the first premolar, second premolar, first molar, second molar, and third molar. RESULTS The intraosseous artery was identified in 336 (84.0%) quadrants. The most common site of termination was at the mesial of the second molar (22%), regardless of dental status and right or left quadrant. Its overall mean diameter was 0.91 ± 0.56 mm, with no difference within the dental status. Its overall mean length was 7.40 ± 3.39 mm, with a statistically significant difference between dentate and edentulous quadrants (P < 0.001). Its overall mean distance from the floor was 6.95 ± 6.49 mm, with no difference within the dental status. All parameters showed no difference between right or left quadrants. CONCLUSIONS The chances of encountering the intraosseous artery at the premolar area is <21% during a lateral window sinus floor elevation. The most common (22%) site of termination of the intraosseous artery is at the mesial of the second molar. Understanding of the course, location, and termination of the artery enhances the precision of a clinician when it comes to pre-operative treatment planning.
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Affiliation(s)
- Troy B Tran
- Graduate Periodontics, School of Dentistry, University of Louisville, Louisville, Kentucky, USA.,Lake Erie College of Osteopathic Medicine School of Dental Medicine, Bradenton, Florida, USA
| | - Nathan E Estrin
- Lake Erie College of Osteopathic Medicine School of Dental Medicine, Bradenton, Florida, USA.,Department of Periodontology, Stony Brook School of Dental Medicine, Stony Brook, New York, USA
| | - Muhammad H A Saleh
- Graduate Periodontics, School of Dentistry, University of Louisville, Louisville, Kentucky, USA.,Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Thomas Y H Yoon
- Lake Erie College of Osteopathic Medicine School of Dental Medicine, Bradenton, Florida, USA
| | - Mustafa Tattan
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, Iowa, USA
| | - Hom-Lay Wang
- Department of Periodontics & Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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18
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Relationships of Stresses on Alveolar Bone and Abutment of Dental Implant from Various Bite Forces by Three-Dimensional Finite Element Analysis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7539628. [PMID: 32149132 PMCID: PMC7049827 DOI: 10.1155/2020/7539628] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 12/02/2019] [Accepted: 01/23/2020] [Indexed: 11/24/2022]
Abstract
Occlusal trauma caused by improper bite forces owing to the lack of periodontal membrane may lead to bone resorption, which is still a problem for the success of dental implant. In our study, to avoid occlusal trauma, we put forward a hypothesis that a microelectromechanical system (MEMS) pressure sensor is settled on an implant abutment to track stress on the abutment and predict the stress on alveolar bone for controlling bite forces in real time. Loading forces of different magnitudes (0 N–100 N) and angles (0–90°) were applied to the crown of the dental implant of the left central incisor in a maxillary model. The stress distribution on the abutment and alveolar bone were analyzed using a three-dimensional finite element analysis (3D FEA). Then, the quantitative relation between them was derived using Origin 2017 software. The results show that the relation between the loading forces and the stresses on the alveolar bone and abutment could be described as 3D surface equations associated with the sine function. The appropriate range of stress on the implant abutment is 1.5 MPa–8.66 MPa, and the acceptable loading force range on the dental implant of the left maxillary central incisor is approximately 6 N–86 N. These results could be used as a reference for the layout of MEMS pressure sensors to maintain alveolar bone dynamic remodeling balance.
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19
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Xie J, Chen P, Rittel D. Finite element modeling of multiple water droplets impact onto a rough surface: Re-assessing Sa and surface wavelength. J Mech Behav Biomed Mater 2020; 110:103816. [DOI: 10.1016/j.jmbbm.2020.103816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 02/06/2023]
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20
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Zhou A, Yu H, Liu J, Zheng J, Jia Y, Wu B, Xiang L. Role of Hippo-YAP Signaling in Osseointegration by Regulating Osteogenesis, Angiogenesis, and Osteoimmunology. Front Cell Dev Biol 2020; 8:780. [PMID: 32974339 PMCID: PMC7466665 DOI: 10.3389/fcell.2020.00780] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/24/2020] [Indexed: 02/05/2023] Open
Abstract
The social demand for dental implantation is growing at a rapid rate, while dentists are faced with the dilemma of implantation failures associated with unfavorable osseointegration. Clinical-friendly osteogenesis, angiogenesis and osteoimmunology around dental implants play a pivotal role in a desirable osseointegration and it's increasingly appreciated that Hippo-YAP signaling pathway is implicated in those biological processes both in vitro and in vivo in a variety of study. In this article we review the multiple effects of Hippo-YAP signaling in osseointegration of dental implants by regulating osteogenesis, angiogenesis and osteoimmunology in peri-implant tissue, as well as highlight prospective future directions of relevant investigation.
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Affiliation(s)
- Anqi Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hui Yu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiayi Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jianan Zheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yinan Jia
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Bingfeng Wu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lin Xiang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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21
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Three-Dimensional Radiographic Outcome of Free-Handed Flaplessly Placed Mini Dental Implants in Edentulous Maxillae after 2-Years Function. J Clin Med 2020; 9:jcm9072120. [PMID: 32635649 PMCID: PMC7408764 DOI: 10.3390/jcm9072120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/22/2020] [Accepted: 06/29/2020] [Indexed: 12/15/2022] Open
Abstract
Background: Free-handed, flaplessly placed mini dental implants (MDIs) are a valuable, more affordable and minimally invasive treatment to support overdentures in fully edentulous jaws, especially for medically compromised patients. However, critical 3D radiographic evaluation is lacking. This multicenter prospective case series assessed clinical outcome and carried out 3D- cone-beam computerized tomography (CBCT) analysis of free-handed flaplessly placed one-piece maxillary MDIs by an experienced maxillofacial surgeon. Methods: Thirty-one patients suffering from an ill-fitting maxillary denture relating to compromised bone volume (as confirmed on CBCT), with a dentate mandible, were selected. They received 5–6 MDIs free-hand flaplessly placed and mentally guided with preoperative CBCT. Final connection and attachment activation took place six months later. After two years each implant was individually assessed with CBCT for perforations on eight sites. Implant survival, prosthetic failure, clinical stability and sinus/nasal complaints were registered after three years. Results: 32/185 (17.3%) MDIs failed during the provisional loading with non-activated attachments; 17 replacements in 10 patients were performed. Of the 170 actively loaded 170 MDIs, 82.3% survived and 27/31 prostheses (87%) were fully functional. In total 98/170 MDIs showed no perforation. Based on 1360 CBCT observations, 231 perforations (16.9%) were registered. Of most perforations 37 (25%) were observed at the apical tip and 37 were positioned (21%) into the sinus/nasal cavity, although without clinical complaints. Conclusions: Given the compromised population, the minimally invasive procedure and the low treatment cost involved, a failure rate of 17% is substantial, however clinically acceptable given the critical bone condition. However, even in experienced surgical hands, freehanded and flapless placement yield a high risk for implant perforation, although this did not necessarily lead to complications.
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22
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Abstract
The topic of titanium alloys for dental implants has been reviewed. The basis of the review was a search using PubMed, with the large number of references identified being reduced to a manageable number by concentrating on more recent articles and reports of biocompatibility and of implant durability. Implants made mainly from titanium have been used for the fabrication of dental implants since around 1981. The main alloys are so-called commercially pure titanium (cpTi) and Ti-6Al-4V, both of which give clinical success rates of up to 99% at 10 years. Both alloys are biocompatible in contact with bone and the gingival tissues, and are capable of undergoing osseointegration. Investigations of novel titanium alloys developed for orthopaedics show that they offer few advantages as dental implants. The main findings of this review are that the alloys cpTi and Ti-6Al-4V are highly satisfactory materials, and that there is little scope for improvement as far as dentistry is concerned. The conclusion is that these materials will continue to be used for dental implants well into the foreseeable future.
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Mechanical Assessment of Fatigue Characteristics between Single- and Multi-Directional Cyclic Loading Modes on a Dental Implant System. MATERIALS 2020; 13:ma13071545. [PMID: 32230822 PMCID: PMC7177857 DOI: 10.3390/ma13071545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/24/2020] [Accepted: 03/26/2020] [Indexed: 11/17/2022]
Abstract
Mechanical testing based on ISO 14801 standard is generally used to evaluate the performance of the dental implant system according to material and design changes. However, the test method is difficult to reflect on the clinical environment because the ISO 14801 standard does not take into account the various loads from different directions during chewing motion. In addition, the fracture pattern of the implant system can occur both in the horizontal and the vertical directions. Therefore, the purpose of this study was to compare fatigue characteristics and fracture patterns between single directional loading conditions based on the ISO 14801 standard and multi-directional loading condition. Firstly, the static test was performed on five specimens to derive the fatigue load, and the fatigue load was chosen as 40% of the maximum load measured in the static test. Subsequently, the fatigue test was performed considering the single axial/occlusal (AO), AO with facial/lingual (AOFL) and AO with mesial/distal (AOMD) directions, and five specimens were used for each fatigue loading modes. In order to analyze the fatigue characteristics, the fatigue cycle at the time of specimen fracture and displacement change of the specimen every 500 cycles were measured. Field emission scanning electron microscopy (FE-SEM) was used to analyze the fracture patterns and the fracture surface. Compared to the AO group, the fatigue cycle of the AOFL and AOMD groups showed lower about five times, while the displacement gradually increased with every 500 cycles. From FE-SEM results, there were no different surface morphology characteristics among three groups. However, the AOMD group showed a vertical slip band. Therefore, our results suggest that the multi-directional loading mode under the worst-case environment can reproduce the vertical fracture pattern in the clinical situation and may be essential to reflect on the dental implant design including connection types and surface treatments.
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Manea A, Bran S, Dinu C, Rotaru H, Barbur I, Crisan B, Armencea G, Onisor F, Lazar M, Ostas D, Baciut M, Vacaras S, Mitre I, Crisan L, Muresan O, Roman R, Baciut G. Principles of biomechanics in oral implantology. Med Pharm Rep 2019; 92:S14-S19. [PMID: 31989104 PMCID: PMC6978931 DOI: 10.15386/mpr-1512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/02/2019] [Indexed: 01/04/2023] Open
Abstract
Background and aims The principles of biomechanics comprise all the interactions between the body (tissues) and the forces acting upon it (directly or via different medical devices). Besides the mechanical aspects, the tissues response is also studied. Understanding and applying these principles is vital for the researchers in the field of oral implantology, but they must be equally known by the practitioners. From the planning stages to the final prosthetic restoration, they are involved in each and every aspect. Ignoring them inevitably leads to failure. Methods The first part of this paper includes a review of our current research in oral implantology (mechanical, digital and biological testing), while the second part includes a review of the available literature on certain biomechanical aspects and their implications in everyday practice. Results Our research opens new study directions and provides increased chances of success for dental implant therapy. The practical aspects of our findings, combined with the available literature (from the basic principles described more than 40 years ago to the most recent studies and technologies) can serve as a guide to practitioners for increasing their success rate. Conclusion While no therapy is without failure risk, a good understanding of the biomechanics involved in oral implantology can lead to higher success rates in implant supported prosthetic restorations.
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Affiliation(s)
- Avram Manea
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Simion Bran
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Cristian Dinu
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Horatiu Rotaru
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ioan Barbur
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Bogdan Crisan
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Gabriel Armencea
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Florin Onisor
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Madalina Lazar
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Daniel Ostas
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Mihaela Baciut
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Sergiu Vacaras
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ileana Mitre
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Liana Crisan
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ovidiu Muresan
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Rares Roman
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Grigore Baciut
- Maxillo-Facial Surgery and Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Chen X, Ma R, Min J, Li Z, Yu P, Yu H. Effect of PEEK and PTFE coatings in fatigue performance of dental implant retaining screw joint: An in vitro study. J Mech Behav Biomed Mater 2019; 103:103530. [PMID: 31756564 DOI: 10.1016/j.jmbbm.2019.103530] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/10/2019] [Accepted: 11/11/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVES Mechanical complications play a key role in failure of dental implants. Retaining screw loosening was one of the most commonly encountered. This study investigated the effect of PEEK and PTFE coatings on dental implant screw thread joint. METHODS Retaining screws were coated with PEEK and PTFE in thickness of 30 μm and 60 μm. Friction coefficient and clamping force of screw thread pair were measured, single load-to-fracture (SLF) test and dynamic fatigue life (DFL) test were done to test the stability of implant thread connection. After that, screw fracture mode and erosion morphology of screw surface and implant internal thread were observed. RESULTS The results showed that both PEEK and PTFE coatings could reduce friction coefficient, and consequently increase clamping force, especially PTFE coatings. PEEK coatings had no significant effect on fracture load, while 30 μm PTFE coating reduced fracture load. PEEK coatings also elongated fatigue life and improved the anti-loosening property under dynamic load, while 30 μm PTFE coating shortened fatigue life. Most of the screw fracture happened at the first thread of the retaining screws. The fracture-end of PEEK coated screws were loosed and could easily remove, but fracture-end of PTFE screws could not. Internal thread observation showed that both PEEK and PTFE coatings could reduce wear of implant internal thread. CONCLUSION PEEK coatings could effectively improve the stability of implant threaded connection, and reduce wear of implant internal thread. PEEK coating may be a suitable way to prevent screw loosening.
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Affiliation(s)
- Xi Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China; Beijing Stomatological Hospital, Capital Medical University, 100050, Beijing, China
| | - Ruiyang Ma
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China
| | - Jie Min
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China
| | - Zhi Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China
| | - Ping Yu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China
| | - Haiyang Yu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, Sichuan Province, China.
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Arakeeb MAA, Zaky AA, Harhash TAH, Salem WS, El-Mofty M. Effect of Combined Application of Growth Factors and Diode Laser Bio-Stimulation on the Osseo Integration of Dental Implants. Open Access Maced J Med Sci 2019; 7:2520-2527. [PMID: 31666858 PMCID: PMC6814472 DOI: 10.3889/oamjms.2019.672] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND: The success of implants is associated first with their osseointegration, and later on with their survival rate. In recent years, many efforts have been exerted to develop implant design, geometry, materials and techniques to enhance the osseointegration process and also to increase the success rate of implant procedures. New techniques, like leukocyte and platelet-rich fibrin (L-PRF) and low-level laser treatment (LLLT), have been developed to enhance the osseointegration around dental implants. AIM: This study aims at accelerating bone osseointegration process around dental implant using new techniques to increase the success rate, to allow immediate or early loading of a dental implant, and to make a comparison between the various new techniques in dental implant procedures to figure out which technique will achieve the best results. METHODS: The study was conducted on a random sample of 40 male patients. Dental implants were placed in the posterior areas of the lower jaw. Patients were divided randomly into 4 groups; control group, LLLT group, L-PRF group and L-PRF plus LLLT group. They were assessed using cone-beam computed tomography (CBCT). RESULTS: The results showed significant differences between all groups over different measured times. All the groups showed improvement in comparison with Normal group, where L-PRF group showed the best result followed by (L-PRF+LLLT) group, while the LLLT group showed the least improvement in comparison with bothL-PRF group and (L-PRF+LLLT) group. CONCLUSION: The study demonstrates that L-PRF gives a better performance in the osseointegration around dental implants than LLLT.
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Affiliation(s)
| | - Ahmed Abbas Zaky
- Department of Medical Applications of Laser, NILES, Cairo University, Cairo, Egypt
| | | | - Walid S Salem
- Oral and Maxillofacial Radiology Department, College of Dentistry, Beni Suef University, Egypt, Beni Suef, Egypt
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27
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Gungormus M, Erbasar GNH. Transient Heat Transfer in Dental Implants for Thermal Necrosis-Aided Implant Removal: A 3D Finite Element Analysis. J ORAL IMPLANTOL 2019; 45:196-201. [PMID: 30775952 DOI: 10.1563/aaid-joi-d-18-00210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Removal of osseointegrated but otherwise failed (mechanical failure, mispositioning, esthetics, etc) dental implants is a traumatic process resulting in loss of healthy bone and complicating the treatment process. The traumatic effects of implant removal can be reduced by weakening the implant-bone attachment. Thermal necrosis-aided implant removal has been proposed as a minimally invasive method toward this end. In this method, an electrocautery tip is contacted to the implant to increase the temperature to 47°C and generate a limited and controlled thermal necrosis at the bone-implant interface. So far, no controlled studies have been performed to investigate the optimal clinical parameters for this method. In this study, we aimed to investigate, using finite element analysis method, the optimal settings to achieve intentional thermal necrosis on 3 implant systems, at 5 W and 40 W device power and with different size tips. The temperature increase of the implants at 40 W power was very sudden (< 0.5 seconds) and as the bone reached 47°C, the implants were at unacceptable temperatures. At 5 W power, temperature increase of the implants happened at manageable durations (< 1 second). Moreover, the temperature increase was even slower with larger implants and larger tip sizes. Therefore, low power settings must be used for thermal necrosis-aided implant removal. Also, the size of the implant and the tip must be taken into consideration in deciding the duration of contact with the electrocautery tip and the implant.
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Affiliation(s)
- Mustafa Gungormus
- 1 School of Engineering and Natural Sciences, Department of Biomedical Engineering, Ankara Yildirim Beyazit University, Ankara, Turkey.,2 School of Dentistry, Department of Basic Sciences, Ankara Yildirim Beyazit University, Ankara, Turkey
| | - Guzin Neda Hasanoglu Erbasar
- 3 School of Dentistry, Department of Oral and Maxillofacial Surgery, Ankara Yildirim Beyazit University, Ankara, Turkey
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28
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Kulakov AA, Kasparov AS, Porfenchuk DA. [Factors affecting osteointegration and the use of early functional load to reduce the duration of treatment in dental implantation]. STOMATOLOGIIA 2019; 98:107-115. [PMID: 31513161 DOI: 10.17116/stomat201998041107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The article presents literature data on the impact of the surface and shape of dental implants and early functional load with aesthetic and functional rehabilitation on osteointegration and stability of implants at various implantation terms.
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Affiliation(s)
- A A Kulakov
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - A S Kasparov
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - D A Porfenchuk
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
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29
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Stevanović M, Đošić M, Janković A, Kojić V, Vukašinović-Sekulić M, Stojanović J, Odović J, Crevar Sakač M, Rhee KY, Mišković-Stanković V. Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium. ACS Biomater Sci Eng 2018; 4:3994-4007. [DOI: 10.1021/acsbiomaterials.8b00859] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Milena Stevanović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Marija Đošić
- Institute for Technology of Nuclear and Other Mineral Raw Materials (ITNMS), Bulevar Franš d’Eperea 86, 11000 Belgrade, Serbia
| | - Ana Janković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Vesna Kojić
- Oncology Institute of Vojvodina, Faculty of Medicine, University of Novi Sad, Put Dr Goldmana 4, 21204 Sremska Kamenica, Serbia
| | - Maja Vukašinović-Sekulić
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Jovica Stojanović
- Institute for Technology of Nuclear and Other Mineral Raw Materials (ITNMS), Bulevar Franš d’Eperea 86, 11000 Belgrade, Serbia
| | - Jadranka Odović
- Faculty of Pharmacy, University of Belgrade, 450 Vojvode Stepe Street, 11000 Belgrade, Serbia
| | - Milkica Crevar Sakač
- Faculty of Pharmacy, University of Belgrade, 450 Vojvode Stepe Street, 11000 Belgrade, Serbia
| | - Kyong Yop Rhee
- Department of Mechanical Engineering, Kyung Hee University, Yongin 449-701, South Korea
| | - Vesna Mišković-Stanković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
- Department of Mechanical Engineering, Kyung Hee University, Yongin 449-701, South Korea
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30
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Hong DGK, Oh JH. Recent advances in dental implants. Maxillofac Plast Reconstr Surg 2017; 39:33. [PMID: 29159171 PMCID: PMC5671421 DOI: 10.1186/s40902-017-0132-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/25/2017] [Indexed: 02/08/2023] Open
Abstract
Dental implants are a common treatment for the loss of teeth. This paper summarizes current knowledge on implant surfaces, immediate loading versus conventional loading, short implants, sinus lifting, and custom implants using three-dimensional printing. Most of the implant surface modifications showed good osseointegration results. Regarding biomolecular coatings, which have been recently developed and studied, good results were observed in animal experiments. Immediate loading had similar clinical outcomes compared to conventional loading and can be used as a successful treatment because it has the advantage of reducing treatment times and providing early function and aesthetics. Short implants showed similar clinical outcomes compared to standard implants. A variety of sinus augmentation techniques, grafting materials, and alternative techniques, such as tilted implants, zygomatic implants, and short implants, can be used. With the development of new technologies in three-dimension and computer-aided design/computer-aided manufacturing (CAD/CAM) customized implants can be used as an alternative to conventional implant designs. However, there are limitations due to the lack of long-term studies or clinical studies. A long-term clinical trial and a more predictive study are needed.
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Affiliation(s)
- Do Gia Khang Hong
- Department of Oral and MaxilloFacial Surgery, Dental Hospital, Gangneung-Wonju National University, Gangneung-si, Gangwon-do Korea, Republic of
| | - Ji-Hyeon Oh
- Department of Oral and MaxilloFacial Surgery, Dental Hospital, Gangneung-Wonju National University, Gangneung-si, Gangwon-do Korea, Republic of
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31
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Gardin C, Ferroni L, Piattelli A, SIvolella S, Zavan B, Mijiritsky E. Non-Washed Resorbable Blasting Media (NWRBM) on Titanium Surfaces could Enhance Osteogenic Properties of MSCs through Increase of miRNA-196a And VCAM1. Stem Cell Rev Rep 2017; 12:543-552. [PMID: 27318850 DOI: 10.1007/s12015-016-9669-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Surface topography of Titanium (Ti) dental implants strongly influences osseointegration. In the present work, we have analyzed the influence of two Ti implant surfaces characterized by similar microtopography but different nanotopography and chemistry on the osteoblastic phenotype of Dental Pulp Stem Cells (DPSCs). The effect on osteogenic differentiation, extracellular matrix (ECM) and cell adhesion molecules production have been evaluated by means of molecular biology analyses. The morphology of the cells grown onto these surfaces has been analyzed with SEM and immunofluorescence (IF), and the safety of the surfaces has been tested by using karyotype analysis, Ames test and hemocompatibility assay. Results showed that starting from 15 days of DPSCs culture, a substantial expression of osteoblast specific markers and a strong increase of cell adhesion molecules can be detected. In particular, when DPSCs are seeded on the Ti implants expression of microRNA (miRNA)-196a, which is involved in osteoblastic commitment of stem cells, and of Vascular Cell Adhesion Molecule 1 (VCAM1), a factor involved in angiogenesis, is strongly enhanced.
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Affiliation(s)
- Chiara Gardin
- Department of Biomedical Sciences, University of Padova, Via U. Bassi 58/B, 35131, Padova, Italy
| | - Letizia Ferroni
- Department of Biomedical Sciences, University of Padova, Via U. Bassi 58/B, 35131, Padova, Italy
| | - Adriano Piattelli
- Department of Stomatology and Biotechnologies, University of Chieti-Pescara, Chieti, Italy
| | - Stefano SIvolella
- Department of Neurological Sciences, University of Padova, Via U. Bassi 58/B, 35131, Padova, Italy
| | - Barbara Zavan
- Department of Biomedical Sciences, University of Padova, Via U. Bassi 58/B, 35131, Padova, Italy.
| | - Eitan Mijiritsky
- Department of Oral Rehabilitation, School of Dental Medicine, Tel-Aviv University, Ramat Aviv, Israel
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32
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Pita MS, do Nascimento C, dos Santos CGP, Pires IM, Pedrazzi V. Experimental conical-head abutment screws on the microbial leakage through the implant-abutment interface: an in vitro
analysis using target-specific DNA probes. Clin Oral Implants Res 2016; 28:e68-e75. [DOI: 10.1111/clr.12876] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2016] [Indexed: 12/01/2022]
Affiliation(s)
- Murillo S. Pita
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Ribeirão Preto; University of São Paulo; 14040-904 São Paulo SP Brazil
| | - Cássio do Nascimento
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Ribeirão Preto; University of São Paulo; 14040-904 São Paulo SP Brazil
| | - Carla G. P. dos Santos
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Ribeirão Preto; University of São Paulo; 14040-904 São Paulo SP Brazil
| | - Isabela M. Pires
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Ribeirão Preto; University of São Paulo; 14040-904 São Paulo SP Brazil
| | - Vinícius Pedrazzi
- Department of Dental Materials and Prosthodontics; Faculty of Dentistry of Ribeirão Preto; University of São Paulo; 14040-904 São Paulo SP Brazil
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