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Matos FG, Stremel ACA, Lipinski LC, Cirelli JA, Dos Santos FA. Dental implants in large animal models with experimental systemic diseases: A systematic review. Lab Anim 2023; 57:489-503. [PMID: 37021606 DOI: 10.1177/00236772221124972] [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: 04/07/2023]
Abstract
This systematic review aims to identify and discuss the most used methodologies in pre-clinical studies for the evaluation of the implementation of dental implants in systemically compromised pigs and sheep. This study provides support and guidance for future research, as well as for the prevention of unnecessary animal wastage and sacrifice. Preferred Reporting for Systematic Reviews and Meta-Analyses (PRISMA) was used as a guideline; electronic searches were performed in PubMed, Scopus, Scielo, Web of Science, Embase, Science Direct, Brazilian Bibliography of Dentistry, Latin American and Caribbean Literature in Health Sciences, Directory of Open Access Journals, Database of Abstracts of Reviews of Effects, and gray literature until January 2022 (PROSPERO/CRD42021270119). Sixty-eight articles were chosen from the 2439 results. Most studies were conducted in pigs, mainly the Göttinger and Domesticus breeds. Healthy animals with implants installed in the jaws were predominant among the pig studies. Of the studies evaluating the effect of systemic diseases on osseointegration, 42% were performed in osteoporotic sheep, 32% in diabetic sheep, and 26% in diabetic pigs. Osteoporosis was primarily induced by bilateral ovariectomy and mainly assessed by X-ray densitometry. Diabetes was induced predominantly by intravenous streptozotocin and was confirmed by blood glucose analysis. Histological and histomorphometric analyses were the most frequently employed in the evaluation of osseointegration. The animal models presented unique methodologies for each species in the studies that evaluated dental implants in the context of systemic diseases. Understanding the most commonly used techniques will help methodological choices and the performance of future studies in implantology.
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Affiliation(s)
| | | | | | - Joni Augusto Cirelli
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, State University of São Paulo (Unesp), Brazil
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Benalcázar-Jalkh EB, Nayak VV, Gory C, Marquez-Guzman A, Bergamo ETP, Tovar N, Coelho PG, Bonfante EA, Witek L. Impact of implant thread design on insertion torque and osseointegration: a preclinical model. Med Oral Patol Oral Cir Bucal 2023; 28:e48-e55. [PMID: 36173722 PMCID: PMC9805329 DOI: 10.4317/medoral.25576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/29/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Successful osseointegration of endosteal dental implants has been attributed to implant design, including the macro-, micro- and nano- geometric properties. Based on current literature pertaining to implant design, the resultant cellular and bone healing response is unknown when the thread thickness of the implants is increased, resulting in an increased contact area in implants designed with healing chambers. The aim of this study was to evaluate the effect of two implant designs with different thread profiles on the osseointegration parameters and implant stability at 3- and 6-weeks in vivo using a well-established preclinical dog model. MATERIAL AND METHODS A total of 48 type V Ti alloy implants were divided in two groups according to their thread design (D1= +0.1x/mm and D2= +0.15x/mm) and placed in an interpolated fashion into the radii of six beagles. Insertion torque was measured at time of placement, radii were extracted for histological processing following 3- and 6-week healing intervals. Histologic and histomorphometric analyses were performed in terms of bone to implant contact (%BIC) and bone area fraction occupancy within implant threads (%BAFO). Statistical analyses were performed through a linear mixed model with fixed factors of time and implant thread design. RESULTS Surface roughness analysis demonstrated no significant differences in Sa and Sq between D1 and D2 implant designs, which confirmed that both implant designs were homogenous except for their respective thread profiles. For insertion torque, statistically significant lower values were recorded for D1 in comparison to D2 (59.6 ± 11.1 and 78.9 ± 10.1 N⋅cm, respectively). Furthermore, there were no significant differences with respect to histological analysis and histomorphometric parameters, between D1 and D2 at both time points. CONCLUSIONS Both thread profiles presented equivalent potential to successfully osseointegrate in the osteotomies, with D2 yielding higher mechanical retention upon placement without detrimental bone resorption.
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Affiliation(s)
- Ernesto B Benalcázar-Jalkh
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Bauru, SP, Brazil
| | - Vasudev Vivekanand Nayak
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Mechanical and Aerospace Engineering, New York University Tandon School of Engineering, Brooklyn, NY, USA
| | - Christina Gory
- Biomaterials Division, New York University College of Dentistry, New York, NY USA
| | | | - Edmara TP Bergamo
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Bauru, SP, Brazil
| | - Nick Tovar
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Oral and Maxillofacial Surgery, New York University, Langone Medical Center and Bellevue Hospital Center, New York, NY, USA
| | - Paulo G Coelho
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Estevam A Bonfante
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Bauru, SP, Brazil
| | - Lukasz Witek
- Biomaterials Division, New York University College of Dentistry, New York, NY USA,Department of Biomedical Engineering, New York University Tandon School of Engineering, Brooklyn, NY, USA
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Insertion Torque, Removal Torque, and Resonance Frequency Analysis Values of Ultrashort, Short, and Standard Dental Implants: An In Vitro Study on Polyurethane Foam Sheets. J Funct Biomater 2022; 14:jfb14010010. [PMID: 36662057 PMCID: PMC9866818 DOI: 10.3390/jfb14010010] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022] Open
Abstract
Short implants were introduced to reduce morbidity, treatment duration, and complex bone regeneration interventions in atrophic jaws and to improve patient-reported outcomes. This study aimed to determine the insertion torque (IT), removal torque (RT), and resonance frequency analysis (RFA) values of ultrashort (3 mm length), short (7 mm length), and standard implants (10 mm length) inserted in 1-, 2-, 3-, and 4-mm thickness polyurethane sheets with densities of 10, 20, and 30 pounds per cubic foot (PCF). Standard-length implants were the gold standard (control). Overall, short-length implant IT values were higher or similar to the control in most experimental conditions. Those inserted into a 3 mm/30 PCF lamina showed the highest IT values, whereas 5 mm diameter ultrashort-length implants inserted into 2 and 3 mm/20 PCF laminas were higher than other implants. RT values followed the same trend and RFA values were more appreciable in short- and standard-length implants in all the scenarios. However, ultrashort-length implants reached a primary stability comparable to that of standard implants in lower thicknesses. In conclusion, although further studies are needed to corroborate this in vitro model with preclinical and clinical studies, our data shed light on short- and ultrashort-length implants geometries to a potential application in critical atrophy of the posterior jaws.
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Sant’Anna HR, Casati MZ, Mussi MC, Cirano FR, Pimentel SP, Ribeiro FV, Corrêa MG. Peri-Implant Repair Using a Modified Implant Macrogeometry in Diabetic Rats: Biomechanical and Molecular Analyses of Bone-Related Markers. MATERIALS 2022; 15:ma15062317. [PMID: 35329768 PMCID: PMC8953263 DOI: 10.3390/ma15062317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/08/2022] [Accepted: 03/11/2022] [Indexed: 02/01/2023]
Abstract
DM has a high prevalence worldwide and exerts a negative influence on bone repair around dental implants. Modifications of the microgeometry of implants have been related to positive results in bone repair. This study assessed, for the first time, the influence of an implant with modified macrodesign based on the presence of a healing chamber in the pattern of peri-implant repair under diabetic conditions. Thirty Wistar rats were assigned to receive one titanium implant in each tibia (Control Implant (conventional macrogeometry) or Test Implant (modified macrogeometry)) according to the following groups: Non-DM + Control Implant; Non-DM + Test Implant; DM + Control Implant; DM + Test Implant. One month from the surgeries, the implants were removed for counter-torque, and the bone tissue surrounding the implants was stored for the mRNA quantification of bone-related markers. Implants located on DM animals presented lower counter-torque values in comparison with Non-DM ones, independently of macrodesign (p < 0.05). Besides, higher biomechanical retention levels were observed in implants with modified macrogeometry than in the controls in both Non-DM and DM groups (p < 0.05). Moreover, the modified macrogeometry upregulated OPN mRNA in comparison with the control group in Non-DM and DM rats (p < 0.05). Peri-implant bone repair may profit from the use of implants with modified macrogeometry in the presence of diabetes mellitus, as they offer higher biomechanical retention and positive modulation of important bone markers in peri-implant bone tissue.
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Mechanical Behaviour and Primary Stability of a Self-Condensing Implant: A Laboratory Critical Simulation of a Severe Maxillary Atrophy on Polyurethane Lamina. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12030966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Background: Posterior maxillary atrophies could emerge after the loss of teeth, trauma, infections, or lesions that often require regenerative approaches. In these critical conditions, the achievement of implant primary stability represents a clinical challenge in the operative practice. Therefore, a two-stage approach is often preferred with a delay of the rehabilitation time and a consistent increasing of the biological and the operative costs. The aim of this study was to evaluate the mechanical behaviour of a self-condenser implant compared to a standard implant in a critical simulation on different thicknesses and densities of polyurethane lamina. Materials and methods: A total of two implant models were tested: a self-condensing device (test) and a standard implant (control). The study evaluated the insertion torque and the pull-out strength values of the test and control implants inserted in different sizes (1, 2, and 3 mm) and density polyurethane lamina (10, 20, and 30 pcf) for a total of 320 experimental sites. Results: In total, 320 experimental sites were produced in the polyurethane samples. A statistically significant difference of insertion and pull-out torque values between the test and control Implants was found in the different bone densities (p < 0.05). The insertion and pull-out torque values were always higher for the test implants in all experimental conditions. In all bone densities, the insertion torque values were higher than the pull-out torque values. The self-condenser dental implant design evaluated in this in vitro study showed a high level of stability in all experimental conditions. Conclusions: The test implant could represent a useful tool for a one-stage surgical approach in the presence of limited residual native bone as an alternative to a delayed technique.
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Gehrke SA, Júnior JA, Treichel TLE, do Prado TD, Dedavid BA, de Aza PN. Effects of insertion torque values on the marginal bone loss of dental implants installed in sheep mandibles. Sci Rep 2022; 12:538. [PMID: 35017552 PMCID: PMC8752839 DOI: 10.1038/s41598-021-04313-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/14/2021] [Indexed: 12/15/2022] Open
Abstract
The aim of the present in vivo study was to analyze and compare the effects on the crestal bone healing of two different implant macrogeometries installed in fresh socket areas and in normal bone areas with different insertion torque values. Two implant macrogeometries were used in the present study, DuoCone implant (DC) and Maestro implant (MAE), forming four groups: group DCws, in which the implants were installed in healing bone (without a socket); group DCfs, in which the implants were installed in post-extraction areas (fresh sockets); group MAEws, in which the implants were installed in healing bone (without a socket); group MAEfs, in which the implants were installed in post-extraction areas (fresh sockets). After 30 and 90 days of implantations in the bilateral mandibles of 10 sheep, eighty implants were evaluated through digital X-ray images and histologic slices. The crestal bone position in relation to the implant platform shoulder was measured and compared. The measured insertion torque was 47.2 ± 4.69 Ncm for the DCws group, 43.4 ± 4.87 Ncm for the DCfs group, 29.3 ± 3.16 Ncm for the MAEws group, and 27.7 ± 4.41 Ncm for the MAEfs group. The radiographic mesio-distal and histological bucco-lingual analyses showed significantly greater vertical bone loss in the implants installed with high torque (DC groups) in comparison to the implants installed with a low torque (MAE groups) (p < 0.05), at both evaluation times. In general, low insertion torque values (Maestro implants) showed better results of MBL when compared to implants installed with higher torque values (Duo Cone implants). Moreover, our results showed that the implants installed in the sites without sockets showed a less MBL in comparison with the implants installed in sites of fresh sockets.
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Affiliation(s)
- Sergio Alexandre Gehrke
- Department of Biotechnology, Universidad Católica de Murcia, 30107, Murcia, Spain.
- Department of Research, Biotecnos - Technology and Science, Cuareim 1483, 11100, Montevideo, Uruguay.
| | | | | | - Tales Dias do Prado
- Department of Surgery, Faculty of Medicine Veterinary, University of Rio Verde, Rio Verde, Brazil
| | - Berenice Anina Dedavid
- Department of Materials Engineering, Pontificia Universidade Católica do Rio Grande do Sul, Porto Alegre, 90619-900, Brazil
| | - Piedad N de Aza
- Department of Materials, Instituto de Bioingenieria, Universidad Miguel Hernández, Elche, Alicante, Spain
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Malcangi G, Inchingolo AD, Inchingolo AM, Santacroce L, Marinelli G, Mancini A, Vimercati L, Maggiore ME, D’Oria MT, Hazballa D, Bordea IR, Xhajanka E, Scarano A, Farronato M, Tartaglia GM, Giovanniello D, Nucci L, Serpico R, Sammartino G, Capozzi L, Parisi A, Di Domenico M, Lorusso F, Contaldo M, Inchingolo F, Dipalma G. COVID-19 Infection in Children, Infants and Pregnant Subjects: An Overview of Recent Insights and Therapies. Microorganisms 2021; 9:1964. [PMID: 34576859 PMCID: PMC8469368 DOI: 10.3390/microorganisms9091964] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The SARS-CoV-2 pandemic has involved a severe increase of cases worldwide in a wide range of populations. The aim of the present investigation was to evaluate recent insights about COVID-19 infection in children, infants and pregnant subjects. METHODS a literature overview was performed including clinical trials, in vitro studies, reviews and published guidelines regarding the present paper topic. A descriptive synthesis was performed to evaluate recent insights and the effectiveness of therapies for SARS-CoV-2 infection in children, infants and pregnant subjects. RESULTS Insufficient data are available regarding the relationship between COVID-19 and the clinical risk of spontaneous abortion and premature foetus death. A decrease in the incidence of COVID-19 could be correlated to a minor expression of ACE2 in childrens' lungs. At present, a modulation of the dose-effect posology for children and infants is necessary. CONCLUSIONS Pregnant vertical transmission has been hypothesised for SARS-CoV-2 infection. Vaccines are necessary to achieve mass immunity for children and also pregnant subjects.
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Affiliation(s)
- Giuseppina Malcangi
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Alessio Danilo Inchingolo
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Angelo Michele Inchingolo
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Luigi Santacroce
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Grazia Marinelli
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Antonio Mancini
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Luigi Vimercati
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Maria Elena Maggiore
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Maria Teresa D’Oria
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
- Department of Medical and Biological Sciences, University of Udine, Via delle Scienze, 206, 33100 Udine, Italy
| | - Denisa Hazballa
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
- Kongresi Elbasanit, Rruga: Aqif Pasha, 3001 Elbasan, Albania
| | - Ioana Roxana Bordea
- Department of Oral Rehabilitation, Faculty of Dentistry, Iuliu Hațieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Edit Xhajanka
- Department of Dental Prosthesis, Medical University of Tirana, Rruga e Dibrës, U.M.T., 1001 Tirana, Albania;
| | - Antonio Scarano
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Marco Farronato
- UOC Maxillo-Facial Surgery and Dentistry, Department of Biomedical, Surgical and Dental Sciences, School of Dentistry, Fondazione IRCCS Ca Granda, Ospedale Maggiore Policlinico, University of Milan, 20100 Milan, Italy; (M.F.); (G.M.T.)
| | - Gianluca Martino Tartaglia
- UOC Maxillo-Facial Surgery and Dentistry, Department of Biomedical, Surgical and Dental Sciences, School of Dentistry, Fondazione IRCCS Ca Granda, Ospedale Maggiore Policlinico, University of Milan, 20100 Milan, Italy; (M.F.); (G.M.T.)
| | | | - Ludovica Nucci
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio, 6, 80138 Naples, Italy; (L.N.); (R.S.); (M.C.)
| | - Rosario Serpico
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio, 6, 80138 Naples, Italy; (L.N.); (R.S.); (M.C.)
| | - Gilberto Sammartino
- Department of Neuroscience, Reproductive Sciences and Dentistry, University of Naples Federico II, 80131 Naples, Italy;
| | - Loredana Capozzi
- Istituto Zooprofilattico Sperimentale Della Puglia e Della Basilicata, 71121 Foggia, Italy; (L.C.); (A.P.)
| | - Antonio Parisi
- Istituto Zooprofilattico Sperimentale Della Puglia e Della Basilicata, 71121 Foggia, Italy; (L.C.); (A.P.)
| | - Marina Di Domenico
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, 80138 Naples, Italy;
| | - Felice Lorusso
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Maria Contaldo
- Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, Via Luigi de Crecchio, 6, 80138 Naples, Italy; (L.N.); (R.S.); (M.C.)
| | - Francesco Inchingolo
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
| | - Gianna Dipalma
- Department of Interdisciplinary Medicine, University of Medicine Aldo Moro, 70124 Bari, Italy; (A.D.I.); (A.M.I.); (L.S.); (G.M.); (A.M.); (L.V.); (M.E.M.); (M.T.D.); (D.H.); (F.I.); (G.D.)
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Petrini M, Pierfelice TV, D’Amico E, Di Pietro N, Pandolfi A, D’Arcangelo C, De Angelis F, Mandatori D, Schiavone V, Piattelli A, Iezzi G. Influence of Nano, Micro, and Macro Topography of Dental Implant Surfaces on Human Gingival Fibroblasts. Int J Mol Sci 2021; 22:9871. [PMID: 34576038 PMCID: PMC8464951 DOI: 10.3390/ijms22189871] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 02/07/2023] Open
Abstract
Current research on dental implants has mainly focused on the influence of surface roughness on the rate of osseointegration, while studies on the development of surfaces to also improve the interaction of peri-implant soft tissues are lacking. To this end, the first purpose of this study was to evaluate the response of human gingival fibroblasts (hGDFs) to titanium implant discs (Implacil De Bortoli, Brazil) having different micro and nano-topography: machined (Ti-M) versus sandblasted/double-etched (Ti-S). The secondary aim was to investigate the effect of the macrogeometry of the discs on cells: linear-like (Ti-L) versus wave-like (Ti-W) surfaces. The atomic force microscopy (AFM) and scanning electron microscopy (SEM) analysis showed that the Ti-S surfaces were characterized by a significantly higher micro and nano roughness and showed the 3D macrotopography of Ti-L and Ti-W surfaces. For in vitro analyses, the hGDFs were seeded into titanium discs and analyzed at 1, 3, and 5 days for adhesion and morphology (SEM) viability and proliferation (Cck-8 and MTT assays). The results showed that all tested surfaces were not cytotoxic for the hGDFs, rather the nano-micro and macro topography favored their proliferation in a time-dependent manner. Especially, at 3 and 5 days, the number of cells on Ti-L was higher than on other surfaces, including Ti-W surfaces. In conclusion, although further studies are needed, our in vitro data proved that the use of implant discs with Ti-S surfaces promotes the adhesion and proliferation of gingival fibroblasts, suggesting their use for in vivo applications.
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Affiliation(s)
- Morena Petrini
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
| | - Tania Vanessa Pierfelice
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
| | - Emira D’Amico
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
| | - Natalia Di Pietro
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
- Center for Advanced Studies and Technology-CAST (ex CeSI-MeT), University G. d’Annunzio of Chieti-Pescara, 66013 Chieti, Italy
| | - Assunta Pandolfi
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
- Center for Advanced Studies and Technology-CAST (ex CeSI-MeT), University G. d’Annunzio of Chieti-Pescara, 66013 Chieti, Italy
| | - Camillo D’Arcangelo
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
| | - Francesco De Angelis
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
| | - Domitilla Mandatori
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
- Center for Advanced Studies and Technology-CAST (ex CeSI-MeT), University G. d’Annunzio of Chieti-Pescara, 66013 Chieti, Italy
| | - Valeria Schiavone
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
- Center for Advanced Studies and Technology-CAST (ex CeSI-MeT), University G. d’Annunzio of Chieti-Pescara, 66013 Chieti, Italy
| | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
- Research Center Fondazione Villa Serena per la Ricerca, 65013 Città Sant’Angelo, Italy
- Clinical Center, Casa di Cura Villa Serena del dott. L. Petruzzi, 65013 Città Sant’Angelo, Italy
| | - Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences, University G. d’Annunzio of Chieti-Pescara, Via dei Vestini 31, 66013 Chieti, Italy; (M.P.); (T.V.P.); (E.D.); (A.P.); (C.D.); (F.D.A.); (D.M.); (V.S.); (A.P.); (G.I.)
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9
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An In Vitro Analysis on Polyurethane Foam Blocks of the Insertion Torque (IT) Values, Removal Torque Values (RTVs), and Resonance Frequency Analysis (RFA) Values in Tapered and Cylindrical Implants. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18179238. [PMID: 34501824 PMCID: PMC8431239 DOI: 10.3390/ijerph18179238] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/28/2021] [Accepted: 08/30/2021] [Indexed: 12/24/2022]
Abstract
Background: Several different dental implant microgeometries have been investigated in the literature for use in low-density bone sites. The polyurethane solid rigid blocks represent an optimal in vitro study model for dental implants, because their composition is characterized by symmetrical linear chains of monomers of hexa-methylene sequences producing a self-polymerization process. The aim of the present investigation was to evaluate the primary stability of cylindrical and tapered implants positioned into low-density polyurethane solid rigid blocks. Materials and Methods: Two different macrogeometries, cylindrical (4 mm diameter and 10 mm length) and tapered dental implants (4.20 mm diameter and 10 mm length), were investigated in the present study. The implants were inserted into 10 PCF and 20 PCF polyurethane blocks, with and without an additional cortical layer. The insertion torque (IT) values, the removal torque values (RTVs), and the resonance frequency analysis (RFA) values were measured and recorded. Results: A total of 80 sites were tested, and a significant increased primary stability (PS) was detected in favour of tapered dental implants when compared to cylindrical implants in all experimental conditions (p < 0.05). Higher IT, RT, and RFA values were measured in tapered implants in 10 and 20 PCF polyurethane blocks, both with and without the additional cortical layer. Conclusions: Both implants showed sufficient primary stability in poor density substrates, while, on the other hand, the tapered microgeometry showed characteristics that could also lead to clinical application in low-density posterior maxillary sites, even with a drastically decreased bone cortical component.
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10
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Gehrke SA, Scarano A, de Lima JHC, Bianchini MA, Dedavid BA, De Aza PN. Effects of the Healing Chambers in Implant Macrogeometry Design in a Low-Density Bone Using Conventional and Undersized Drilling. J Int Soc Prev Community Dent 2021; 11:437-447. [PMID: 34430506 PMCID: PMC8352059 DOI: 10.4103/jispcd.jispcd_96_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/14/2021] [Accepted: 05/22/2021] [Indexed: 11/04/2022] Open
Abstract
Background: The ideal installation technique or implant macrogeometry for obtaining an adequate osseointegration in low-density bone tissue follows a challenge in the implantology. Aims and Objective: The aim of the present study was to evaluate the behavior of three osteotomy techniques and two implant macrogeometries in two low-density polyurethane blocks. The insertion torque (IT), initial stability, pullout resistance, and weight of the residual bone material deposited on the implants were assessed. Materials and Methods: A total of 120 implants with two different macrogeometries were used. They were divided into six groups according to the implant macrogeometry and the drilling technique performed (n = 20 implants per group). The implants were installed in polyurethane blocks with pounds per cubic foot (PCF) 10 and PCF 20 densities. The IT, initial stability, pullout resistance, and weight residual bone were measured. Results: Differences were found in the values referring to the macrogeometry of the implants and the type of osteotomy performed. In all groups, the initial stability of the PCF 10 blocks was quite low. The undersized osteotomies significantly increased the values measured in all tests in the PCF 20 density blocks. Conclusions: In conclusion, even when a modified (undersized) osteotomy technique is used, implants inserted in low-quality bone (type IV) can present problems for osseointegration due their low initial stability and bone resistance. However, the modification in the implant macrogeometry (with healing chambers) presented more quantity of bone on the surface after the pullout test.
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Affiliation(s)
- Sergio A Gehrke
- Department of Research, Biotecnos, Montevideo, Uruguay.,Department of Biotechnology, Universidad Católica de Murcia, Murcia, Spain.,Instituto de Bioingenieria, Universidad Miguel Hernández, Elche (Alicante), Spain
| | - Antônio Scarano
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti, Italy
| | - José H C de Lima
- Department of Rehabilitation, Universidade Federal Fluminense, Rio de Janeiro, Brazil
| | - Marco A Bianchini
- Post-Graduate Program in Implant Dentistry, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Berenice A Dedavid
- Department of Materials Engineering, Pontificia Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Piedad N De Aza
- Instituto de Bioingenieria, Universidad Miguel Hernández, Elche (Alicante), Spain
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11
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Osseointegration of Sandblasted and Acid-Etched Implant Surfaces. A Histological and Histomorphometric Study in the Rabbit. Int J Mol Sci 2021; 22:ijms22168507. [PMID: 34445213 PMCID: PMC8395172 DOI: 10.3390/ijms22168507] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 02/06/2023] Open
Abstract
Titanium surface is an important factor in achieving osseointegration during the early wound healing of dental implants in alveolar bone. The purpose of this study was to evaluate sandblasted-etched surface implants to investigate the osseointegration. In the present study, we used two different types of sandblasted-etched surface implants, an SLA™ surface and a Nanoblast Plus™ surface. Roughness and chemical composition were evaluated by a white light interferometer microscope and X-ray photoelectron spectroscopy, respectively. The SLA™ surface exhibited the higher values (Ra 3.05 μm) of rugosity compared to the Nanoblast Plus™ surface (Ra 1.78 μm). Both types of implants were inserted in the femoral condyles of ten New Zealand white rabbits. After 12 weeks, histological and histomorphometric analysis was performed. All the implants were osseointegrated and no signs of infection were observed. Histomorphometric analysis revealed that the bone–implant contact % (BIC) ratio was similar around the SLA™ implants (63.74 ± 13.61) than around the Nanoblast Plus™ implants (62.83 ± 9.91). Both implant surfaces demonstrated a favorable bone response, confirming the relevance of the sandblasted-etched surface on implant osseointegration.
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12
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Patano A, Cirulli N, Beretta M, Plantamura P, Inchingolo AD, Inchingolo AM, Bordea IR, Malcangi G, Marinelli G, Scarano A, Lorusso F, Inchingolo F, Dipalma G. Education Technology in Orthodontics and Paediatric Dentistry during the COVID-19 Pandemic: A Systematic Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18116056. [PMID: 34199882 PMCID: PMC8200064 DOI: 10.3390/ijerph18116056] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 05/27/2021] [Accepted: 06/02/2021] [Indexed: 12/14/2022]
Abstract
Over the last decade, medical education changed from traditional teaching methods to telematic and networking scholar and e-learning approach. The objective of the present systematic review was to evaluate the effectiveness and teachers/student's acceptability of e-learning applied to the field of orthodontics and paediatric dentistry. A database search of the literature was conducted on PubMed and Embase databases from January 2005 to May 2021. A total of 172 articles were identified by the electronic search, while a total of 32 papers were selected for qualitative analysis. Overall, 19 articles investigated the effectiveness of e-learning, and no difference of acceptability was reported between e-learning and traditional methods for a wide part of the articles selected. A total of 25 papers provided a satisfaction questionnaire for learners and all were positive in their attitude towards e-learning. The results showed that e-learning is an effective method of instruction, complementing the traditional teaching methods, and learners had a positive attitude and perception. The evidence of the present study reported a high level of acceptability and knowledge level of e-learning techniques, compared to frontal lecture methods, in the fields of orthodontics and paediatric dentistry.
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Affiliation(s)
- Assunta Patano
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
| | - Nunzio Cirulli
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
- Private Practice in Bari, 70121 Bari, Italy
| | - Matteo Beretta
- Digital Dentistry, Private in Varese, 21100 Varese, Italy;
| | - Paola Plantamura
- Department of Computer Science, University of Bari “Aldo Moro”, 70121 Bari, Italy;
| | - Alessio Danilo Inchingolo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
| | - Angelo Michele Inchingolo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
| | - Ioana Roxana Bordea
- Department of Oral Rehabilitation, Faculty of Dentistry, Iuliu Hațieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
- Correspondence: (I.R.B.); (G.M.); (F.L.); Tel.: +40-7-4491-9319 (I.R.B); +39-34-0334-8500 (G.M.); +39-32-8213-2586 (F.L.)
| | - Giuseppina Malcangi
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
- Correspondence: (I.R.B.); (G.M.); (F.L.); Tel.: +40-7-4491-9319 (I.R.B); +39-34-0334-8500 (G.M.); +39-32-8213-2586 (F.L.)
| | - Grazia Marinelli
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
| | - Antonio Scarano
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Felice Lorusso
- Department of Innovative Technologies in Medicine and Dentistry, University of Chieti-Pescara, 66100 Chieti, Italy;
- Correspondence: (I.R.B.); (G.M.); (F.L.); Tel.: +40-7-4491-9319 (I.R.B); +39-34-0334-8500 (G.M.); +39-32-8213-2586 (F.L.)
| | - Francesco Inchingolo
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
| | - Gianna Dipalma
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy; (A.P.); (N.C.); (A.D.I.); (A.M.I.); (G.M.); (F.I.); (G.D.)
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13
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Histological and Histomorphometric Effectiveness of the Barrier Membranes for Jawbone Regeneration: An Overview of More Than 30 Years’ Experience of Research Results of the Italian Implant Retrieval Center (1988–2020). APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11052438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
With the advent of implant dentistry, height and width of the bone site are fundamental to perform implant placements. There are several techniques to restore the amount of bone loss and one of them is guided bone regeneration, which is based on the employment of a membrane in order to bypass non-osteogenic cell invasion in the bone healing area, dispersing every interference with bone regeneration. Two expert reviewers performed a retrospective evaluation of all scientific papers published by the Implant Retrieval Center Laboratory of University “G. D’Annunzio” of Chieti-Pescara in the last three decades, and they implemented it by also similar conducting research on the main scientific databases, i.e., PubMed, Scopus, and EMBASE. The search was conducted up to December 2020, and a total of 843 articles published by the Implant Retrieval Center Laboratory of University “G.D’Annunzio” of Chieti-Pescara were identified and evaluated. After the application of inclusion and exclusion criteria, a total of 27 manuscripts were included for the qualitative synthesis: 8 animal studies, 17 human studies, and 2 in vitro articles. The present overview shows the importance of translational research for barrier membranes for bone regeneration, and additionally, the need for experts in different fields and research centers to produce high quality data in future research.
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14
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Comuzzi L, Tumedei M, De Angelis F, Lorusso F, Piattelli A, Iezzi G. Influence of the dental implant macrogeometry and threads design on primary stability: an in vitro simulation on artificial bone blocks. Comput Methods Biomech Biomed Engin 2021; 24:1242-1250. [PMID: 33492988 DOI: 10.1080/10255842.2021.1875219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The implant macrogeometry and thread profile represent one of the most important factors for a successful achievement of primary stability during the positioning procedure. The aim of the present investigation was to evaluate the insertion torque (IT), removal torque (RT) and Implant stability Quotient (ISQ) of two different implant macrogeometry and thread profile on solid rigid polyurethane model. Two different implants macrogeometries were tested: K2 (Group I) with 11° angle, 1.17 mm pitch and self-cutting V thread profile and K3 (Group II) implants with 30° angle, 0.71 mm pitch and spyral thread profile. A total of 120 specimens (n = 60 for each group) were positioned into different conditions of solid rigid polyurethane blocks. The insertion torque (IT), removal torque (RT) and ISQ were measured for each specimen. All specimens achieved the positioning into solid rigid polyurethane blocks for both of groups with no loss of stability. A significantly higher IT, RT and ISQ were detected in Group II (p < 0.05). In both groups the mean values for IT, RT and ISQ appeared promising from a clinical point of view. In spite of different macrogeometry and thread profile, both implant types achieved high primary stability on solid rigid polyurethane block to support the functional loading for a clinical application.
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Affiliation(s)
- Luca Comuzzi
- Private Practice, San Vendemiano-Conegliano (Treviso), Italy
| | - Margherita Tumedei
- Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Francesco De Angelis
- Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Felice Lorusso
- Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
| | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy.,Biomaterials Engineering, Catholic University of San Antonio de Murcia (UCAM), Guadalupe, Murcia, Spain.,Villaserena Foundation for Research, Città Sant'Angelo (PE), Italy
| | - Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences, University "G. D'Annunzio" of Chieti-Pescara, Chieti, Italy
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15
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Tumedei M, Piattelli A, Falco A, De Angelis F, Lorusso F, Di Carmine M, Iezzi G. An in vitro evaluation on polyurethane foam sheets of the insertion torque, removal torque values, and resonance frequency analysis (RFA) of a self-tapping threads and round apex implant. CELLULAR POLYMERS 2020. [DOI: 10.1177/0262489320971796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The dental implant primary stability and micromovement absence represent critical factor for dental implant osseointegration. The aim of the present in vitro investigation was to simulate the bone response on different polyurethane densities the effect of self-tapping threads and round apex implant geometry. A total of 40 implants were positioned in D1, D2, D3 and D4 polyurethane block densities following a calibrated drilling protocol. The Insertion, removal Torque and resonance frequency analysis (RFA) means were calculated. All experimental conditions showed insertion torque values >30 Ncm. A significant higher insertion torque, removal and RFA was present in D1 polyurethane. Similar evidences were evidenced for D3 and D4. The effectiveness of the present study suggested a valuable clinical advantage for self-tapping threads and round apex implant using, such as in case of reduced bone density in the posterior maxilla
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Affiliation(s)
- Margherita Tumedei
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Via dei Vestini, Chieti, Italy
| | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Via dei Vestini, Chieti, Italy
- Chair of Biomaterials Engineering, Catholic University of San Antonio de Murcia (UCAM), Av. de los Jerónimos, Guadalupe, Murcia, Spain
- Fondazione Villa Serena per la Ricerca, Città Sant’Angelo (PE), Italy
| | | | - Francesco De Angelis
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Via dei Vestini, Chieti, Italy
| | - Felice Lorusso
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Via dei Vestini, Chieti, Italy
| | | | - Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Via dei Vestini, Chieti, Italy
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16
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Osseodensification Drilling vs. Standard Protocol of Implant Site Preparation: An In Vitro Study on Polyurethane Foam Sheets. PROSTHESIS 2020. [DOI: 10.3390/prosthesis2020008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
(1) Background: The aim of the present in vitro investigation was to evaluate, on polyurethane sheets, two different drilling techniques for dental implant positioning using osteocondensing burs compared to a standard type protocol. (2) Methods: Three different implant designs (Implacil De Bortoli UN III 4 × 10 mm, Restore RBM 4 (HEX) × 10 mm; Implacil De Bortoli UN II 4 × 10 mm) were evaluated (test implant (osteocondensing drills) and control implant (standard drills)). The insertion torque (IT), the removal torque (RT) and the resonance frequency analysis (RFA) values of test and control implants inserted in different size and different density polyurethane foam models were compared for 120 experimental sites. Accordingly, 120 experimental holes were produced in different PCF polyurethane foams: 60 sites were produced in 10 PCF sheets and 60 sites in 10 PCF sheets with an additional 1 mm layer of 30 PCF. (3) Results: The IT, removal torque and RFA values were significantly higher for both of the evaluated implants, in the sites prepared with the osteocondenser drills when compared to sites prepared with standard drills (p < 0.05). The UNII and UN III showed significantly higher stability compared to the HEX implant; these differences increased drastically in the 10 PCF Polyurethane Block with the additional 1 mm cortical layer (p < 0.05). (4) Conclusions: The outcome of this investigation suggested a possible clinical application of osteocondensing burs in case of reduced bone quality and quantity in the posterior maxilla.
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