1
|
Vinhas AS, Salazar F, Mendes JM, Silva AS, Ríos-Carrasco B, Ríos-Santos JV, Gil J, Herrero-Climent M, Aroso C. SEM Analysis and Micro-CT Evaluation of Four Dental Implants after Three Different Mechanical Requests-In Vitro Study. Materials (Basel) 2024; 17:434. [PMID: 38255602 PMCID: PMC10820107 DOI: 10.3390/ma17020434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/24/2023] [Accepted: 01/07/2024] [Indexed: 01/24/2024]
Abstract
STATEMENT OF PROBLEM Implant-supported rehabilitations are an increasingly frequent practice to replace lost teeth. Before clinical application, all implant components should demonstrate suitable durability in laboratory studies, through fatigue tests. OBJECTIVE The purpose of this in vitro study was to evaluate the integrity and wear of implant components using SEM, and to assess the axial displacement of the implant-abutment assembly by Micro-CT, in different implant connections, after three distinct mechanical requests. MATERIALS AND METHODS Four KLOCKNER implants (external connection SK2 and KL; and internal connection VEGA and ESSENTIAL) were submitted to three different mechanical requests: single tightening, multiple tightening, and multiple tightening and cyclic loading (500 N × 100 cycles). A total of 16 samples were evaluated by SEM, by the X-ray Bragg-Brentano method to obtain residual stresses, and scratch tests were realized for each surface and Micro-CT (4 control samples; 4 single tightening; 4 multiple tightening; 4 multiple tightening and cyclic loading). All dental implants were fabricated with commercially pure titanium (grade 3 titanium). Surface topography and axial displacement of abutment into the implant, from each group, were evaluated by SEM and Micro-CT. RESULTS In the manufacturing state, implants and abutments revealed minor structural changes and minimal damage from the machining process. The application of the tightening torque and loading was decisive in the appearance and increase in contact marks on the faces of the hexagon of the abutment and the implant. Vega has the maximum compressive residual stress and, as a consequence, higher scratch force. The abutment-implant distances in SK2 and KL samples did not show statistically significant differences, for any of the mechanical demands analyzed. In contrast, statistically significant differences were observed in abutment-implant distance in the internal connection implants Vega and Essential. CONCLUSIONS The application of mechanical compression loads caused deformation and contact marks in all models tested. Only internal connection implants revealed an axial displacement of the abutment into the implant, but at a general level, a clear intrusion of the abutment into the implant could only be confirmed in the Essential model, which obtained its maximal axial displacement with cyclic loading.
Collapse
Affiliation(s)
- Ana Sofia Vinhas
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, Rua Central de Gandra, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (J.M.M.); (A.S.S.); (C.A.)
| | - Filomena Salazar
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, Rua Central de Gandra, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (J.M.M.); (A.S.S.); (C.A.)
| | - José Manuel Mendes
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, Rua Central de Gandra, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (J.M.M.); (A.S.S.); (C.A.)
| | - António Sérgio Silva
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, Rua Central de Gandra, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (J.M.M.); (A.S.S.); (C.A.)
| | - Blanca Ríos-Carrasco
- Department of Periodontology, School of Dentistry, Universidad de Sevilla, C/Avicena S/N, 41009 Sevilla, Spain;
| | - José Vicente Ríos-Santos
- Department of Periodontology, School of Dentistry, Universidad de Sevilla, C/Avicena S/N, 41009 Sevilla, Spain;
| | - Javier Gil
- Bioengineering Institute of Technology, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, 08195 Sant Cugat-Barcelona, Spain;
| | | | - Carlos Aroso
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), CESPU, Rua Central de Gandra, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (J.M.M.); (A.S.S.); (C.A.)
| |
Collapse
|
2
|
Ribera OK, Mendes JM, Mendes J, Barreiros P, Aroso C, Silva AS. Influence of Popular Beverages on the Fracture Resistance of Implant-Supported Bis-Acrylic Resin Provisional Crowns: An In Vitro Study. Polymers (Basel) 2023; 15:3411. [PMID: 37631468 PMCID: PMC10458795 DOI: 10.3390/polym15163411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/09/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Implant-supported provisional restorations are critical for improving the esthetics and shaping of the peri-implant tissue. The mechanical properties of these provisional materials can be influenced by saliva, food, beverages, and interactions between these materials in the oral environment. Therefore, the integrity of provisional restorations should be preserved throughout the treatment period. This study aimed to evaluate the fracture strength of implant-supported polymethyl methacrylate (PMMA) provisional restorations made of computer-aided design and computer-aided manufacturing when immersed in different solutions at a controlled temperature of 37 °C for 7 days. Each analog-pillar-crown set was submerged in different liquids: 10 pieces were placed in distilled water then in tea, coffee, red wine, and Coca Cola® for 1 week at a controlled oral temperature of 37 °C. The samples were then subjected to fracture forces. The moment of fracture of the crown was recorded and compared with those of the other samples. Specimens immersed in distilled water (control group) had the highest fracture resistance (mean [M] = 1331.00 ± 296.74 N), while those immersed in tea had the lowest mean resistance to fracture (mean [M] = 967.00 ± 281.86 N). Nutritional deficiency and inappropriate eating habits influence the fracture strength of temporary crowns, thereby rendering them more elastic or less resistant to fractures.
Collapse
Affiliation(s)
- Oriana Karolina Ribera
- Department of Oral Rehabilitation, Instituto Universitário de Ciências da Saúde, Rua Central da Gandra 1317, 4585-116 Gandra, Portugal;
| | - José Manuel Mendes
- UNIPRO–Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (J.M.M.); (J.M.); (P.B.)
| | - Joana Mendes
- UNIPRO–Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (J.M.M.); (J.M.); (P.B.)
| | - Pedro Barreiros
- UNIPRO–Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (J.M.M.); (J.M.); (P.B.)
| | - Carlos Aroso
- UNIPRO–Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (J.M.M.); (J.M.); (P.B.)
| | - António Sérgio Silva
- UNIPRO–Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS-CESPU), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (J.M.M.); (J.M.); (P.B.)
| |
Collapse
|
3
|
Monteiro S, Barreiros P, Mendes J, Aroso C, Silva AS, Mendes JM. The Influence of Cleaning Solutions on the Retention of Overdenture Attachment Systems. Biomedicines 2023; 11:1681. [PMID: 37371776 DOI: 10.3390/biomedicines11061681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 05/30/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Dental-implant-supported reconstructions provide comfort and improvements in prosthetic function, adaptation, and stability over conventional treatment options. The objective of this study was to evaluate the effect of different denture cleansing solutions and their influence on the deterioration and loss of retention of overdenture attachments in a 12-month clinical-use simulation. In this way, ten specimens each of different brands of retentive caps made of Teflon (OT Equator® (Rhein83, Bologna, Italy), Locator® (Zest Anchors, Escondido, CA, USA), Kerator® (KJ Meditech, Gwangiu, Republic of Korea), and Locator R-Tx® (Zest Anchors, Escondido, CA, USA)) were immersed in five different cleaning solutions (Kukident® (P&G Tech, Oxford Parkway, UK), Benfix® (Laboratorios URGO S.L., Guipúzcoa, Spain), Corega® (Stafford Miller, Waterford, Ireland), and Protefix® (Neuhofer Weiche, Parchim, Germany)), and tap water was used as the control group, in a simulation that lasted 12 months. Data were analyzed using two-way ANOVA and a Tukey HSD. Furthermore, a Levene Test and Shapiro-Wilk tests were performed to assess the validation of the ANOVA assumptions. The statistical analysis was performed using R version 4.2.2 software with the significance level set to p < 0.05. There were significant statistical differences between the different manufacturers regarding the retention forces of the attachment's retentive caps (F = 322.066, p < 0.001). For the cleaning solution groups, different statistical results between Kukident® (P&G Tech, Oxford Parkway, UK) (p < 0.05) and Benfix® (Laboratorios URGO S.L., Guipúzcoa, Spain) (p < 0.05) were observed. There were no significant statistical differences between Corega® (Stafford Miller, Ireland), Protefix® (Neuhofer Weiche, Parchim, Germany), and tap water, even though the retention forces decreased in all of them.
Collapse
Affiliation(s)
- Sofia Monteiro
- Oral Rehabilitation and Prosthodontics Service, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - Pedro Barreiros
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - Joana Mendes
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - Carlos Aroso
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - António Sérgio Silva
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| | - José Manuel Mendes
- UNIPRO-Oral Pathology and Rehabilitation Research Unit, University Institute of Health Sciences (IUCS), CESPU, 4585-116 Gandra, Portugal
| |
Collapse
|
4
|
Santos MA, Muinelo-Lorenzo J, Fernández-Alonso A, Cruz-Landeira A, Aroso C, Suárez-Cunqueiro MM. Age Estimation Using Maxillary Central Incisor Analysis on Cone Beam Computed Tomography Human Images. Int J Environ Res Public Health 2022; 19:13370. [PMID: 36293951 PMCID: PMC9603614 DOI: 10.3390/ijerph192013370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Forensic dentistry plays an important role in human identification, and dental age estimation is an important part of the process. Secondary dentin deposition throughout an individual's lifetime and consequent modification in teeth anatomy is an important parameter for age estimation procedures. The aim of the present study was to develop regression equations to determine age in adults by means of linear measurements and ratios on sagittal, coronal and axial slices of maxillary central incisors using cone bean computed tomography (CBCT). Multiplanar measurements of upper central incisors were taken for a sample of 373 CBCTs. Subsequently, one-way analysis of variance (ANOVA) and multivariate linear regressions were performed for age estimation. The equations obtained from axial linear measurements and ratios presented a standard error of the estimate (SEE) of ±10.9 years (R2 = 0.49), and a SEE of ±10.8 years (R2 = 0.50), respectively. The equation obtained for multiplanar linear measurements presented a SEE of ±10.9 years (R2 = 0.52), while the equation for multiplanar ratios presented a SEE of ±10.7 years (R2 = 0.51). Thus, CBCT measurements on upper central incisors were found to be an acceptable method for age estimation. Horizontal measurements, especially pulp measurements, improve the accuracy of age estimate equations.
Collapse
Affiliation(s)
- María Arminda Santos
- Department of Dental Science, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Juan Muinelo-Lorenzo
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana Fernández-Alonso
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Angelines Cruz-Landeira
- Department of Forensic Sciences, Pathology, Ginecology and Obstetrics, and Pediatrics, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carlos Aroso
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politénico e Universitario (CESPU), 4585-116 Gandra, Portugal
| | - María Mercedes Suárez-Cunqueiro
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Health Research Institute of Santiago de Compostela (IDIS), Complexo Hospitalario Universitario de Santiago de Compostela (CHUS/SERGAS), 15706 Santiago de Compostela, Spain
| |
Collapse
|
5
|
Novais M, Silva AS, Mendes J, Barreiros P, Aroso C, Mendes JM. Fracture Resistance of CAD/CAM Implant-Supported 3Y-TZP-Zirconia Cantilevers: An In Vitro Study. Materials (Basel) 2022; 15:6638. [PMID: 36233980 PMCID: PMC9571496 DOI: 10.3390/ma15196638] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/17/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
(1) Introduction: Implant-supported fixed complete dentures are mostly composed of cantilevers. The purpose of this work was to evaluate the fracture resistance of zirconia (Prettau®, second generation, or Ice Zirkon Translucent, first generation) with cantilever lengths of 6 and 10 mm, and zirconia’s fracture resistance in relation to an average bite force of 250 N. (2) Materials and methods: Forty structures were created in CAD/CAM and divided into four groups: group A (6 mm cantilever in IZT), group B (10 mm cantilever in IZT), group C (6 mm cantilever in Pz), and group D (10 mm cantilever in pz). The study consisted of a traditional “load-to-failure” test. (3) Results: A statistically significant result was found for the effect of cantilever length, t(38) = 16.23 (p < 0.001), with this having a large effect size, d = 4.68. The 6 mm cantilever length (M = 442.30, sd = 47.49) was associated with a higher mean force at break than the 10 mm length (M = 215.18, sd = 40.74). No significant effect was found for the type of zirconia: t(38) = 0.31 (p = 0.757), and d = 0.10. (4) Conclusions: All the components with cantilever lengths of 6 mm broke under forces higher than 250 N. Cantilevers larger than 10 mm should be avoided.
Collapse
|
6
|
Mendes J, Mendes JM, Barreiros P, Aroso C, Silva AS. Retention Capacity of Original Denture Adhesives and White Brands for Conventional Complete Dentures: An In Vitro Study. Polymers (Basel) 2022; 14:polym14091749. [PMID: 35566919 PMCID: PMC9104604 DOI: 10.3390/polym14091749] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 12/23/2022] Open
Abstract
(1) Introduction: Denture adhesives (DAs) promote stability, chewing ability, and quality of life. The objective of this study was to compare the effectiveness of original brand DAs and white brands in their retention of conventional complete dentures. (2) Methods: This study followed the recommendations of the international standard ISO 10873. Three original brands of DA (Corega® Fixação 3D, GlaxoSmithKline®, Stafford Miller Ltd., Dungarvan Co. Waterford, Ireland), KuKident® Pro Procter & Gamble Technical Centres®, Ltd., Whitehal Lane, Germany and Elgydium® Fix, Laboratórios URGO® SL, Florida, Spain) were compared to three white brands (Fixação Extra Forte Pingo Doce®, Laboratórios Cosmodent®, Cantabria, Spain), Fixador de Próteses (Continente®, Propack®,Gmbh, Ladenburg, Germany) and Creme Fixador de Próteses (Auchan®, Ellipse®, Roubaix, France). Their retention capacities were analyzed using a mechanical test device. (3) Results: The mean retentive ability of original brand adhesives (M = 11.16, SD = 5.27) was significantly higher (t(298) = 11.88; p < 0.001) than that of the white brands (M = 5.92, SD = 1.18). When comparing all brands, statistically significant differences were also observed, F(5.294) = 707.68 (p < 0.001). The generic adhesive results were more homogeneous. The generic brands from Continente® (M = 5.24, SD = 0.94) and Auchan® (M = 5.80, SD = 0.79) were not significantly different, while the Pingo Doce® brand obtained significantly higher mean retention results (M = 6.71, SD = 1.28). (4) Conclusions: The original brands of DA have a significantly higher retentive ability than the white brands. Elygidim® Fix had the worst result of the three original brands, and the product from Pingo Doce® had the best result among the three white brands.
Collapse
|
7
|
Vinhas AS, Aroso C, Salazar F, López-Jarana P, Ríos-Santos JV, Herrero-Climent M. Review of the Mechanical Behavior of Different Implant-Abutment Connections. Int J Environ Res Public Health 2020; 17:ijerph17228685. [PMID: 33238476 PMCID: PMC7700386 DOI: 10.3390/ijerph17228685] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 12/20/2022]
Abstract
Introduction: Different implant-abutment connections have been developed to reduce mechanical and biological failure. The most frequent complications are loss of preload, screw loosening, abutment or implant fracture, deformations at the different interfaces, and bacterial microleakage. Aim: To review the evidence indicating whether the implant-abutment connection type is significant regarding the following issues: (1) maintenance of the preload in static and dynamic in vitro studies; (2) assessment of possible deformations at the implant-abutment interfaces, after repeated application of the tightening torque; (3) evaluation of the sealing capability of different implant connections against microleakage. Materials and Methods: In June 2020, an electronic literature search was performed in Medline, EBSCO host, and PubMed databases. The search was focused on the ability of different implant connections to maintain preload, resist deformation after tightening and retightening, and prevent microleakage. The related titles and abstracts available in English were screened, and the articles that fulfilled the inclusion criteria were selected for full-text reading. Results: The literature search conducted for this review initially resulted in 68 articles, among which 19 articles and 1 systematic review fulfilled the criteria for inclusion. The studies were divided according to the three proposed objectives, with some studies falling into more than one category (maintenance of preload, surface abutment-implant deformation, and resistance to microleakage). Conclusions: Conical abutment appears to result in fewer mechanical complications, such as screw loosening or fractures, and higher torque preservation. After SEM evaluation, damage was observed in the threads of the abutment screws, before and after loading in internal and external connections. Internal hexagon implants and predominantly internal conical (Morse taper) implants showed less microleakage in dynamic loading conditions. We suggest further studies to guarantee excellence in methodological quality.
Collapse
Affiliation(s)
- Ana Sofia Vinhas
- Department of Periodontology, Instituto Universitário de Ciências da Saúde, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (P.L.-J.)
| | - Carlos Aroso
- Department of Prosthodontics, Instituto Universitário de Ciências da Saúde, 4585-116 Gandra, Portugal;
| | - Filomena Salazar
- Department of Periodontology, Instituto Universitário de Ciências da Saúde, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (P.L.-J.)
| | - Paula López-Jarana
- Department of Periodontology, Instituto Universitário de Ciências da Saúde, 4585-116 Gandra, Portugal; (A.S.V.); (F.S.); (P.L.-J.)
| | - José Vicente Ríos-Santos
- Department of Periodontology, School of Dentistry, Universidad de Sevilla, C/Avicena S/N, 41009 Sevilla, Spain
- Correspondence: ; Tel.: +34-954-481-121; Fax: +34-954-481-157
| | | |
Collapse
|
8
|
Barreiros P, Neves L, Aroso C, Mendes JM, Silva AS. Comparison in Four Different Implant Systems of Mechanical Resistance to Maximal Stress in Prosthetic Screws-An In Vitro Study. Dent J (Basel) 2020; 8:dj8040116. [PMID: 33050156 PMCID: PMC7712841 DOI: 10.3390/dj8040116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/27/2020] [Accepted: 10/03/2020] [Indexed: 12/26/2022] Open
Abstract
Micromovements of the implant–abutment connection influence peri-implant bone preservation. This study evaluates and quantifies the maximal torque after a cycle of implant prosthetic screws tightening using original components. A total of 40 samples were tested: Megagen®—Daegu, South Korea; Dentium®—Gangnam-Gu, Seoul, Korea; BIOMET 3i®—West Palm Beach, FL, USA and BTI®—Álava, Spain. Screws from each manufacturer were subjected to maximal stress force until they fractured. The fracture points were recorded and compared among all samples. To compare the mean values of fracture torques, the reference values associated with each brand and the sample results were used in t-tests. ANOVA (analysis of variance) was used to compare the maximal resistance limit between brands, complemented with Tukey’s multiple-comparison test. The maximal considered level of significance was 5%. The average fracture force for the brands was 40.07 Ncm for Megagen®, 53.39 Ncm for Dentium®, 39.74 Ncm for Biomet 3i®, and 68.84 Ncm for BTI®. BTI® screws showed the most resistance to fracture. According to the protocol that was applied, the implant–abutment connection demonstrated good resistance and a precise fit between these interfaces; therefore, in some cases, the presented values showed a lack of quality control and low fracture resistance.
Collapse
Affiliation(s)
- Pedro Barreiros
- Department of Oral Rehabilitation, Instituto Universitário de Ciências da Saúde Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (P.B.); (L.N.)
| | - Luís Neves
- Department of Oral Rehabilitation, Instituto Universitário de Ciências da Saúde Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (P.B.); (L.N.)
| | - Carlos Aroso
- Dental Science Department, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (C.A.); (J.M.M.)
| | - José M. Mendes
- Dental Science Department, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (C.A.); (J.M.M.)
| | - António Sérgio Silva
- Dental Science Department, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (IINFACTS), Rua Central da Gandra 1317, 4585-116 Gandra, Portugal; (C.A.); (J.M.M.)
- Correspondence: ; Tel.: +351-918-725-156
| |
Collapse
|
9
|
Aroso C, Silva AS, Ustrell R, Mendes JM, Braga AC, Berastegui E, Escuin T. Effect of abutment angulation in the retention and durability of three overdenture attachment systems: An in vitro study. J Adv Prosthodont 2016; 8:21-9. [PMID: 26949484 PMCID: PMC4769886 DOI: 10.4047/jap.2016.8.1.21] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Revised: 12/02/2015] [Accepted: 12/14/2015] [Indexed: 11/23/2022] Open
Abstract
PURPOSE This in vitro study investigated and compared the durability and retention of three types of attachments. MATERIALS AND METHODS Three commercially available attachments were investigated: Clix®, Dalbo-Plus® and Locator®. In total, 72 samples of these attachments were placed in the acrylic resin forms and subjected to mechanical testing (5400 cycles of insertion and removal) over the respective ball or Locator abutments immersed in artificial saliva at pH 7 and 37℃. The abutments were placed at angulations of 0°, 10° and 20°. The retention force was recorded at the beginning and after 540, 1080, 2160, 3240, 4320 and 5400 insertion-removal cycles. RESULTS The results revealed that there were significant differences in the average values of the insertion/removal force due to angulation (F (2.48) = 343619, P<.05) and the type of attachment (F (7.48) = 23.220, P<.05). CONCLUSION Greater angulation of the abutments was found to influence the retention capacity of the attachments, and the fatigue test simulating 5 years of denture insertion and removal did not produce wear in the metal abutments.
Collapse
Affiliation(s)
- Carlos Aroso
- Department of Oral Rehabilitation, Instituto Universitario de Ciencias da Saude (IUCS), Portugal
| | - Antonio Sergio Silva
- Department of Oral Rehabilitation, Instituto Universitario de Ciencias da Saude (IUCS), Portugal
| | - Raul Ustrell
- Industrial Engineer, Chairman of Idearum, Enginyeria i Innovació de Producte, Igualada, Barcelona, Spain
| | - Jose Manuel Mendes
- Department of Oral Rehabilitation, Instituto Universitario de Ciencias da Saude (IUCS), Portugal
| | - Ana Cristina Braga
- Department of Production and Systems Engineering, University of Minho (UM), Braga, Portugal
| | - Esther Berastegui
- Department of Endodontics, Faculty of Odontology, University of Barcelona, Barcelona, Spain
| | - Tomas Escuin
- Department of Rehabilitation and Maxillofacial Prostheses, Faculty of Odontology, University of Barcelona, Barcelona, Spain
| |
Collapse
|
10
|
Silva AS, Aroso C, Ustrell R, Braga AC, Mendes JM, Escuin T. The influence of saliva pH value on the retention and durability of bar-clip attachments. J Adv Prosthodont 2015; 7:32-8. [PMID: 25722835 PMCID: PMC4341184 DOI: 10.4047/jap.2015.7.1.32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 09/11/2014] [Accepted: 01/06/2015] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The aim of this study was to compare the durability and retention of 4 types of attachments placed over computer aided design/computer aided manufacturing (CAD/CAM) titanium bars when subjected to different pH conditions. MATERIALS AND METHODS Four commercially available attachments were investigated: Hader Yellow, Hader Red, Ackerman Gold and Ackerman Stainless Steel. These attachments and Ackerman CAD/CAM titanium bars were placed in 2 vessels containing different artificial saliva solutions (pH 7/pH 4) at 37℃ for one month to simulate corrosion conditions, and they were then subjected to mechanical testing (5400 cycles of insertion and removal). RESULTS The results revealed that there were significant differences in the average values of insertion/removal force due to the pH (F (1, 24)=9.207, P<.05) and the type of attachment (F (3, 24)=11.742, P<.05). CONCLUSION More acidic pH values were found to have a negative influence on the retention capacity of the attachments.
Collapse
Affiliation(s)
- Antonio Sergio Silva
- Department of Oral Rehabilitation, Instituto Superior de Ciencias da Saude - Norte, Gandra, Portugal
| | - Carlos Aroso
- Department of Oral Rehabilitation, Instituto Superior de Ciencias da Saude - Norte, Gandra, Portugal
| | - Raul Ustrell
- Industrial Engineer, Chairman of Idearum, Enginyeria i Innovació de Producte, Igualada, Barcelona, Spain
| | - Ana Cristina Braga
- Department of Production and Systems Engineering, University of Minho (UM), Braga, Portugal
| | - Jose Manuel Mendes
- Department of Oral Rehabilitation, Instituto Superior de Ciencias da Saude - Norte, Gandra, Portugal
| | - Tomas Escuin
- Department of Rehabilitation and Maxillofacial Prostheses, Faculty of Odontology, University of Barcelona, Barcelona, Spain
| |
Collapse
|
11
|
Silva S, Aroso C, Ustrell R, Mendes J, Escuin J. Projection and construction of a machine to study the retention and wear in attachments used on implant supported overdentures. Bull Group Int Rech Sci Stomatol Odontol 2012; 51:e07. [PMID: 25460784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Indexed: 06/04/2023]
Abstract
Short Communication selected from the Oral Presentations of the 56th Congress of the Groupèment International pour la Recherche Scientifique en Stomatologie et Odontologie, Peñafiel (Portugal) May 2012.
Collapse
Affiliation(s)
- S Silva
- Instituto Superior de Ciências da Saúde -Norte (ISCS-N).
| | | | | | | | | |
Collapse
|