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Journal articles on the topic 'Iso 14801'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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1

Kim, Won Hyeon, Eun Sung Song, Kyung Won Ju, Dohyung Lim, Dong-Wook Han, Tae-Gon Jung, Yong-Hoon Jeong, Jong-Ho Lee, and Bongju Kim. "Mechanical Assessment of Fatigue Characteristics between Single- and Multi-Directional Cyclic Loading Modes on a Dental Implant System." Materials 13, no. 7 (March 27, 2020): 1545. http://dx.doi.org/10.3390/ma13071545.

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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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Uzcátegui, G., E. Dávila, and M. Cerrolaza. "A SIMPLE AND EFFICIENT METHODOLOGY TO IMPROVE DESIGN PROPOSALS OF DENTAL IMPLANTS — A DESIGN CASE STUDY." Biomedical Engineering: Applications, Basis and Communications 27, no. 04 (August 2015): 1550037. http://dx.doi.org/10.4015/s1016237215500374.

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Objective: To propose a methodology based on virtual simulation to assist in the design proposals of dental implants. Methods: The finite element method (FEM) was used to analyze the biomechanical dental implant system behavior, determining von Mises stress distribution induced by functional loads, varying parameter as load direction and geometric characteristic of the implant (taper, length, abutment angulation, thread pitch and width pitch). A final design was obtained by considering the parameters that showed improved performance. The estimated lifetime of the final design was calculated by reproducing in a virtual way the experimental fatigue test required by the ISO:14801 standards. Results: For all the studied cases, the maximum stresses were obtained in the connecting screw under oblique loads (OLs). The estimated lifetime for this critical part is at least 5 × 106 cycles, which meets the requirement of the ISO:14801. In bone tissue, the largest stresses were concentrated in cortical bone, in the zone surrounding the implant, in good agreement with previous reports. Conclusions: A dental implant design was obtained and validated through a simple and efficient methodology based on the application of numerical methods and computer simulations.
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Armentia, Mikel, Mikel Abasolo, Ibai Coria, and Joseba Albizuri. "Fatigue Design of Dental Implant Assemblies: A Nominal Stress Approach." Metals 10, no. 6 (June 3, 2020): 744. http://dx.doi.org/10.3390/met10060744.

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Fatigue is the most common mechanical failure type in dental implants. ISO 14801 standardizes fatigue testing of dental implants, providing the load-life curve which is most useful for comparing the fatigue behavior of different dental implant designs. Based on it, many works were published in the dental implant literature, comparing different materials, component geometries, connection types, surface treatments, etc. These works are useful for clinicians in order to identify the best options available in the market. The present work is intended not for clinicians but for dental implant manufacturers, developing a design tool that combines Finite Element Analysis, fatigue formulation and ISO 14801 experimental tests. For that purpose, 46 experimental tests were performed on BTI INTERNA® IIPSCA4513 implants joined with INPPTU44 abutments by means of INTTUH prosthetic screws under three different tightening torque magnitudes. Then, the load case was reproduced in a FE model from where the nominal stress state in the fatigue critical section was worked out. Finally, Walker criterion was used to represent accurately the effects of mean stress and predict fatigue life of the studied dental implant assembly, which can be extended to most of the products of BTI manufacturer. By means of this tool, dental implant manufacturers will be able to identify the critical design and assembly parameters in terms of fatigue behavior, evaluate their influence in preliminary design stages and consequently design dental implants with significantly better fatigue response which in turn will reduce future clinical incidences.
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4

Ziębowicz, B., A. Ziębowicz, B. Bączkowski, W. Kajzer, and A. Kajzer. "Biomechanical Analysis of Individual All-Ceramic Abutments Used in Dental Implantology." Archives of Metallurgy and Materials 61, no. 3 (September 1, 2016): 1357–62. http://dx.doi.org/10.1515/amm-2016-0223.

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Abstract The paper presents the results of finite element analysis and experimental testing under simulated physiological loading conditions on issues shaping the functional properties of individual all-ceramic abutments manufactured by CAD/CAM technology. The conducted research have cognitive significance showing the all-ceramic abutment behavior, as a key element of the implantological system, under the action of cyclic load. The aim of this study was evaluation the fatigue behavior of yttria-stabilized zirconia abutment submitted to cyclic stresses, conducted in accordance with EN ISO 14801 applies to dynamic fatigue tests of endosseous dental implants.
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5

Fernández-Asián, Martínez-González, Torres-Lagares, Serrera-Figallo, and Gutiérrez-Pérez. "External Connection versus Internal Connection in Dental Implantology. A Mechanical in vitro Study." Metals 9, no. 10 (October 15, 2019): 1106. http://dx.doi.org/10.3390/met9101106.

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(1) Background: In today's dentistry, implantology has become a therapeutic resource of choice in certain clinical situations. The design of implants has evolved in several aspects since their inception. Dental implants were initially designed with an external hex connection, although due to force transmission and security in the adjustment of the prosthesis, later implants featured an internal hex connection. This study aims to analyse the mechanical properties of two types of implants (an internal connection and an external connection) from the same manufacturer and their different prosthetic components (union screw between implant and prosthetic abutment, and the abutment itself) when subjected to different types of load. (2) Materials and methods: Intraosseous dental implants of similar shape, design and size, although different in type of connection (external vs. internal), were studied. The specifications of the UNI EN ISO 14801 test standard were used, with all determinations being carried out three times. Finally, the dimensional characterisation of the samples analysed after the dynamic load study was carried out, and the values of both study groups were compared by means of the non-parametric Mann–Whitney U test to find statistically significant differences (p < 0.05). (3) Results: For the static characterisation test, we found between 610.9 N and 986.1 N for the external connection and between 1263.6 N and 1324 N for the internal connection (p = 0.011). All of the dynamic load tests were positive and there was no failure in any of the components studied. (4) Conclusions: After the analysis of the samples studied in vitro, satisfactory results were obtained, demonstrating that both connections can support considerable mechanical loads according to international standards (UNI EN ISO 14801).
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Marchetti, Enrico, Stefano Ratta, Stefano Mummolo, Simona Tecco, Raffaella Pecci, Rossella Bedini, and Giuseppe Marzo. "Mechanical Reliability Evaluation of an Oral Implant-Abutment System According to UNI EN ISO 14801 Fatigue Test Protocol." Implant Dentistry 25, no. 5 (October 2016): 613–18. http://dx.doi.org/10.1097/id.0000000000000453.

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7

García-González, Marta, Sergio Blasón-González, Ismael García-García, María Jesús Lamela-Rey, Alfonso Fernández-Canteli, and Ángel Álvarez-Arenal. "Optimized Planning and Evaluation of Dental Implant Fatigue Testing: A Specific Software Application." Biology 9, no. 11 (October 31, 2020): 372. http://dx.doi.org/10.3390/biology9110372.

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Mechanical complications in implant-supported fixed dental prostheses are often related to implant and prosthetic design. Although the current ISO 14801 provides a framework for the evaluation of dental implant mechanical reliability, strict adherence to it may be difficult to achieve due to the large number of test specimens which it requires as well as the fact that it does not offer any probabilistic reference for determining the endurance limit. In order to address these issues, a new software program called ProFatigue is presented as a potentially powerful tool to optimize fatigue testing of implant-supported prostheses. The present work provides a brief description of some concepts such as load, fatigue and stress-number of cycles to failure curves (S-N curves), before subsequently describing the current regulatory situation. After analyzing the two most recent versions of the ISO recommendation (from 2008 and 2016), some limitations inherent to the experimental methods which they propose are highlighted. Finally, the main advantages and instructions for the correct implementation of the ProFatigue free software are given. This software will contribute to improving the performance of fatigue testing in a more accurate and optimized way, helping researchers to gain a better understanding of the behavior of dental implants in this type of mechanical test.
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Frigan, Chevalier, Zhang, and Spies. "Is a Zirconia Dental Implant Safe When It Is Available on the Market?" Ceramics 2, no. 4 (October 12, 2019): 568–77. http://dx.doi.org/10.3390/ceramics2040044.

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The market share of zirconia (ZrO2) dental implants is steadily increasing. This material comprises a polymorphous character with three temperature-dependent crystalline structures, namely monoclinic (m), tetragonal (t) and cubic (c) phases. Special attention is given to the tetragonal phase when maintained in a metastable state at room temperature. Metastable tetragonal grains allow for the beneficial phenomenon of Phase Transformation Toughening (PTT), resulting in a high fracture resistance, but may lead to an undesired surface transformation to the monoclinic phase in a humid environment (low-temperature degradation, LTD, often referred to as ‘ageing’). Today, the clinical safety of zirconia dental implants by means of long-term stability is being addressed by two international ISO standards. These standards impose different experimental setups concerning the dynamic fatigue resistance of the final product (ISO 14801) or the ageing behavior of a standardized sample (ISO 13356) separately. However, when evaluating zirconia dental implants pre-clinically, oral environmental conditions should be simulated to the extent possible by combining a hydrothermal treatment and dynamic fatigue. For failure analysis, phase transformation might be quantified by non-destructive techniques, such as X-Ray Diffraction (XRD) or Raman spectroscopy, whereas Scanning Electron Microscopy (SEM) of cross-sections or Focused Ion Beam (FIB) sections might be used for visualization of the monoclinic layer growth in depth. Finally, a minimum load should be defined for static loading to fracture. The purpose of this communication is to contribute to the current discussion on how to optimize the aforementioned standards in order to guarantee clinical safety for the patients.
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Řehounek, Luboš, Aleš Jíra, Gabriela Javorská, and Daniel Bodlák. "NUMERICAL COMPARISON OF TRANSGINGIVAL AND SUBGINGIVAL DENTAL IMPLANTS IN REGARD TO THEIR STRESS DISTRIBUTIONS." Acta Polytechnica CTU Proceedings 30 (April 22, 2021): 81–86. http://dx.doi.org/10.14311/app.2021.30.0081.

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Most modern dental implants differentiate in regard to the fixation of the abutment into two main categories - the external or internal hexagon or octagon. We performed mechanical tests according to the ČSN EN ISO 14801 standard on a dental implant variant using the external hex. We found that failure of all implant specimens occured below the screw head. To improve the current geometry, we performed numerical analysis of an alternative variant (internal hex) and compared it with analysis of the current geometry (external hex). It was found that the stress distribution of the variant with internal hex is preferable to the old variant. Although extreme values of shear stress in the corresponding plane of loading are higher, they do not concentrate below the screw head, where the screw itself is thinner and more prone to breaking. Therefore, it seems that the new variant of the dental implant is stronger, which is still to be proven by mechanical tests.
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Balog, Martin, Josko Viskic, Peter Krizik, Zdravko Schauperl, Mateja Snajdar, Zlatko Stanec, and Amir Catic. "CP Ti Fabricated by Low Temperature Extrusion of HDH Powder: Application in Dentistry." Key Engineering Materials 704 (August 2016): 351–59. http://dx.doi.org/10.4028/www.scientific.net/kem.704.351.

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Powder metallurgy (PM) commercial purity titanium (CP Ti) was fabricated and studied, with an aim of utilization for dental application. PM CP Ti was manufactured using a cost effective approach, where affordable hydrogenation–dehydrogenation (HDH) process Ti 99.4 wt.% powder was consolidated via the following sequence of PM techniques: cold isostatic pressing, warm vacuum pressing at 420 °C and warm direct extrusion at 500 °C. The paper presents the first studies on processing, microstructure, testing of mechanical properties, fatigue performance and bonding strength with different veneer coatings. By employed consolidation process sound material with low porosity (1.5%) and sustained oxygen content (0.21 wt.%) was attained. The tensile properties obtained for PM CP Ti (UTS = 701 MPa, YS0.2 = 512 MPa, ε = 13 %) were improved over to those for cast / milled CP Ti Grade 4 reference, the material commonly used in dentistry. Tested using the ISO 14801 standard for dental implants, the samples machined from PM CP Ti showed fatigue performance similar to CP Ti Grade 4. PM CP Ti used as a metal base material in restoration metal – ceramic systems showed very good bond strength with three commercially available veneering ceramics and complied with the ISO 9693 standard. Within the limitations of this paper, the preliminary results demonstrated that performance of economic PM CP Ti is equal or superior to CP Ti Grade 4 reference material and it can be used in prosthodontics.
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Thomé, Geninho, André Gomes, Marcos de Moura, Christian Beng, and Larissa Trojan. "Evaluation of the Mechanical Reliability of Different Implant-Abutment Connections for Single Crowns According to the ISO 14801 Fatigue Test Protocol." International Journal of Oral & Maxillofacial Implants 36, no. 1 (January 2021): 47–54. http://dx.doi.org/10.11607/jomi.7965.

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12

Wachtel, Andreas, Tycho Zimmermann, Tobias Spintig, Florian Beuer, Wolf-Dieter Müller, and Andreas Dominik Schwitalla. "A Novel Approach to Prove Bacterial Leakage of Implant-Abutment Connections In Vitro." Journal of Oral Implantology 42, no. 6 (December 1, 2016): 452–57. http://dx.doi.org/10.1563/aaid-joi-d-16-00065.

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Bacterial leakage from the implant-abutment-interface (IAI) is suspected of contributing to the development of peri-implantitis. The aim of the study was to develop a straightforward test setup to evaluate the bacterial leakage of the IAI of 2-piece implant systems under laboratory conditions. A test suspension of Enterococcus faecium was injected into 7 implants (PerioType Rapid Implants) prior to abutment fixation. The IAI was covered by kanamycin aesculn azide agar (KAAA), which serves as an optical indicator for E. faecium. The specimens were cyclically loaded with a force of 120 N for up to 1 000 000 cycles in a universal testing machine in accordance with the ISO 14801:2007 standard. The color change of the KAAA was recorded. Three of the 7 implants showed bacterial leakage before the cyclic loading test started. The bacterial tightness of the IAIs of the 4 remaining implants lasted for 35 680 ± 22 467 cycles on average. The experimental setup at hand provides the means for a straightforward evaluation of the bacterial tightness of the IAI of 2-piece dental implants.
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13

Buitrago Osuna, Asterlis, Martha Lucia Sarmiento Delgado, Carlos Alberto Serrano Méndez, and Sandra Consuelo Henao Riveros. "Evaluación de la colonización bacteriana de la interfase implante-pilar en implantes de conexión interna: estudio piloto." Acta Odontológica Colombiana 8, no. 2 (July 1, 2018): 41–51. http://dx.doi.org/10.15446/aoc.v8n2.73877.

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Introducción: La interfase implante-pilar da lugar a la formación de un espacio, cuyo tamaño varía de acuerdo a variables como las tolerancias de maquinado, los micro-movimientos, el tipo de fabricación de los aditamentos protésicos y el material de los mismos. Este espacio, en cercanía a los tejidos peri-implantares, es una oportunidad para la movilización de microorganismos de forma bidireccional, desencadenando eventualmente respuesta tisular. Objetivo: comparar la filtración de Echerichia coli (E. coli) en la interfase de implantes de conexión interna con pilares prefabricados y personalizados. Materiales y métodos: nueve implantes (Osseotite® Tapered Certain®, 3i Biomet) fueron divididos en tres grupos basados en el tipo de pilar utilizado. Grupo 1 pilares prefabricados Provide®, grupo 2 pilares personalizados Encode® Titanio, grupo 3 pilares personalizados Encode® Zirconia. Los pilares fueron conectados a los implantes y fueron ciclados según la norma ISO 14801:2007 (250.000 ciclos) en un dispositivo de carga dinámica. Fueron sumergidos en caldo infusión cerebro corazón (BHI) inoculado con E. coli. Se tomaron muestras y se midió la turbidez del medio. Se realizó test ANOVA para comparar el tamaño de la interfase implante-pilar. Resultados: se encontró que todas las muestras filtraron en diferentes proporciones. Conclusiones: todas las muestras mostraron filtración de E. coli.
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Heller, Hadas, Adi Arieli, Ilan Beitlitum, Raphael Pilo, and Shifra Levartovsky. "Load-Bearing Capacity of Zirconia Crowns Screwed to Multi-Unit Abutments with and without a Titanium Base: An In Vitro Pilot Study." Materials 12, no. 19 (September 20, 2019): 3056. http://dx.doi.org/10.3390/ma12193056.

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The static and dynamic load-bearing capacities and failure modes of zirconia crowns screwed to multi-unit abutments (MUAs) with and without a titanium base (T-base) were determined. Thirty-six monolithic zirconia crowns screwed to straight MUAs torqued to laboratory analogs (30 Ncm) were assigned to two groups (n = 18). In group A, the zirconia crowns were screwed directly to the MUAs; in group B, the zirconia crowns were cemented to the T-base and screwed to the MUAs. All specimens were aged in 100% humidity (37 °C) for one month and subjected to thermocycling (20,000 cycles). Afterwards, the specimens underwent static and dynamic loading tests following ISO 14801. The failure modes were evaluated by stereomicroscopy (20×). There was an unequivocally similar trend in the S-N plots of both specimen groups. The load at which the specimens survived 5,000,000 cycles was 250 N for both groups. Group A failed mainly within the metal, and zirconia failure occurred only at a high loading force. Group B exhibited failure within the metal mostly in conjunction with adhesive failure between the zirconia and T-base. Zirconia restoration screwed directly to an MUA is a viable option, but further studies with larger sample sizes are warranted.
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Choi, Nak-Hyun, Hyung-In Yoon, Tae-Hyung Kim, and Eun-Jin Park. "Improvement in Fatigue Behavior of Dental Implant Fixtures by Changing Internal Connection Design: An In Vitro Pilot Study." Materials 12, no. 19 (October 7, 2019): 3264. http://dx.doi.org/10.3390/ma12193264.

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(1) Background: The stability of the dental implant–abutment complex is necessary to minimize mechanical complications. The purpose of this study was to compare the behaviors of two internal connection type fixtures, manufactured by the same company, with different connection designs. (2) Methods: 15 implant–abutment complexes were prepared for each group of Osseospeed® TX (TX) and Osseospeed® EV (EV): 3 for single-load fracture tests and 12 for cyclic-loaded fatigue tests (nominal peak values as 80%, 60%, 50%, and 40% of the maximum breaking load) according to international standards (UNI EN ISO 14801:2013). They were assessed with micro-computed tomography (CT), and failure modes were analyzed by scanning electron microscope (SEM) images. (3) Results: The maximum breaking load [TX: 711 ± 36 N (95% CI; 670–752), EV: 791 ± 58 N (95% CI; 725–857)] and fatigue limit (TX: 285 N, EV: 316 N) were higher in EV than those in TX. There was no statistical difference in the fracture areas (P > 0.99). All specimens with 40% nominal peak value survived 5 × 106 cycles, while 50% specimens failed before 105 cycles. (4) Conclusions: EV has improved mechanical properties compared with TX. A loading regimen with a nominal peak value between 40% and 50% is ideal for future tests of implant cyclic loading.
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Burkhardt, Felix, Markus Harlass, Erik Adolfsson, Kirstin Vach, Benedikt Christopher Spies, and Ralf-Joachim Kohal. "A Novel Zirconia-Based Composite Presents an Aging Resistant Material for Narrow-Diameter Ceramic Implants." Materials 14, no. 9 (April 23, 2021): 2151. http://dx.doi.org/10.3390/ma14092151.

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A novel ceria-stabilized zirconia-alumina-aluminate composite (Ce-TZP-comp) that is not prone to aging presents a potential alternative to yttrium-stabilized zirconia for ceramic oral implants. The objective of this study was to evaluate the long-term stability of a one-piece narrow-diameter implant made of Ce-TZP-comp. Implant prototypes with a narrow (3.4 mm) and regular (4.0 mm) diameter were embedded according to ISO 14801, and subgroups (n = 8) were subsequently exposed to dynamic loading (107 cycles, 98N) and/or hydrothermal treatment (aging, 85 °C). Loading/aging was only applied as a combined protocol for the 4.0 mm diameter implants. One subgroup of each diameter remained untreated. One sample was cross-sectioned from each subgroup and evaluated with a scanning electron microscope for phase-transformation of the lattice. Finally, the remaining samples were loaded to fracture. A multivariate linear regression model was applied for statistical analyses (significance at p < 0.05). All samples withstood the different loading/aging protocols and no transformation propagation was observed. The narrow diameter implants showed the lowest fracture load after combined loading/aging (628 ± 56 N; p < 0.01), whereas all other subgroups exhibited no significantly reduced fracture resistance (between 762 ± 62 and 806 ± 73 N; p > 0.05). Therefore, fracture load values of Ce-TZP-comp implants suggest a reliable intraoral clinical application in the anterior jaw regions.
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Giner, Sergio, José F. Bartolomé, Pablo Gomez-Cogolludo, Carlos Castellote, and Guillermo Pradíes. "Mechanical Performance of Chairside Ceramic CAD/CAM Restorations and Zirconia Abutments with Different Internal Implant Connections: In Vitro Study and Finite Element Analysis." Materials 14, no. 17 (September 2, 2021): 5009. http://dx.doi.org/10.3390/ma14175009.

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(computer-aided design-computer-aided manufacturing) CAD/CAM monolithic restorations connected to zirconia abutments manufactured with a chairside workflow are becoming a more common restorative option. However, their mechanical performance is still uncertain. The aim of this study was to evaluate the mechanical behavior of a combination of a zirconia abutment and monolithic all-ceramic zirconia and lithium disilicate crown manufactured with a chairside workflow, connected to titanium implants with two types of internal connection—tube in tube connection and conical connection with platform switching. They were thermally cycled from 5 °C to 55 °C and were subjected to a static and fatigue test following ISO 14801. The fractured specimens from the fatigue test were examined by SEM (scanning electron microscopy). Simulations of the stress distribution over the different parts of the restorative complex during the mechanical tests were evaluated by means of (finite element analysis) FEA. The mechanical performance of the zirconia abutment with an internal conical connection was higher than that of the tube in tube connection. Additionally, the use of disilicate or zirconia all-ceramic chairside CAD/CAM monolithic restorations has similar results in terms of mechanical fracture and fatigue resistance. Stress distribution affects the implant/restoration complex depending on the connection design. Zirconia abutments and monolithic restorations seem to be highly reliable in terms of mechanical resistance.
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Tribst, João Paulo Mendes, Amanda Maria de Oliveira Dal Piva, Laís Regiane da Silva-Concílio, Pietro Ausiello, and Les Kalman. "Influence of Implant-Abutment Contact Surfaces and Prosthetic Screw Tightening on the Stress Concentration, Fatigue Life and Microgap Formation: A Finite Element Analysis." Oral 1, no. 2 (April 19, 2021): 88–101. http://dx.doi.org/10.3390/oral1020009.

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The purpose of this in silico study was to investigate the effect of abutment screw torque and implant-abutment contact surfaces on the stress generation, microgap formation and simulated fatigue life of an external hexagon connection under oblique loading. Three-dimensional numerical models of the external hexagon implant were modeled containing two different implant-abutment contact surfaces (with and without contacting the hexagon axial walls) as well as using screw torques of 20 Ncm or 30 Ncm. Following the ISO 14801, an oblique load of 100 N was applied to the prosthesis. The von Mises stress, microgap formation, safety factor and fatigue life were obtained. The stresses in the abutment screw and implant were minimally influenced by the screw torque. However, this minimal stress in the screw with a 30 Ncm torque reduced the calculated fatigue life in comparison with 20 Ncm when the external hexagon axial walls were not in contact at the implant-abutment interface. The safety factor for the implant was higher when using minimal surfaces at the abutment-interfaces; however, it compromised the screw safety factor increasing its failure probability. The higher the screw torque, the lower was the microgap formation at the implant-abutment interface. However, the calculated residual stress is proportional to the applied torque, reducing the fatigue life in the screw. This effect can be attenuated using an implant-abutment system with more contacting surfaces.
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Hamschmidt, Jost, and Thomas Dyllick. "ISO 14001." Greener Management International 2001, no. 34 (June 1, 2001): 43–54. http://dx.doi.org/10.9774/gleaf.3062.2001.su.00006.

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20

Melo Filho, Antonio Braulino de, João Paulo Mendes Tribst, Nathália de Carvalho Ramos, Julio Nogueira Luz, Maria Aparecida Neves Jardini, Alexandre Luiz Souto Borges, Mauro Pedrine Santamaria, and Renata Marques de Melo. "Failure Probability, Stress Distribution and Fracture Analysis of Experimental Screw for Micro Conical Abutment." Brazilian Dental Journal 30, no. 2 (March 2019): 157–63. http://dx.doi.org/10.1590/0103-6440201902401.

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Abstract The aim of this study was to evaluate the failure probability of two types of abutment screws after compressive load and to analyze the stress distribution with finite element method. Sixty (60) single-tooth implant restorations were assembled on titanium implants (e-fix, A.S. Technology - Titanium Fix). The groups were divided into Conventional screw (Screw neck 1.5 ø mm) and Experimental screw (Screw neck constricted with 1.2 ø mm). Specimens were subjected to single load to failure with compressive test according ISO 14801. The fractured specimens were subjected to stereomicroscopy for measurement of remaining screws inside the implant and characterization of fracture origin. Representative specimens were analyzed by scanning electronic microscopy. For finite element method (FEM), an identical 3D model of the two in vitro test groups were used with similar conditions (30º, 100 N load). The stress in the abutment screw was analyzed by von-Mises criteria. The results of strength means were 4132.5 ± 76 MPa and 4528.2 ± 127.2 for conventional and experimental groups, respectively. During microscopy, the mean (mm) of the remaining screw piece inside the implants were 0.97 ± 0.23 and 1.32 ± 0.12 for conventional and experimental groups, respectively. In FEM, the conventional group showed stress concentered in an unfavorable region (peak of 39.23 MPa), while the experimental group showed more stress areas but less concentration than the conventional group (36.6 MPa). In using the tested experimental geometry, the abutment screw can have its strength improved, and the origin of failure can be more favorable to clinical resolution.
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Jeng, Ming-Dih, Po-Yi Liu, Jia-Hum Kuo, and Chun-Li Lin. "Load Fatigue Performance Evaluation on Two Internal Tapered Abutment–Implant Connection Implants Under Different Screw Tightening Torques." Journal of Oral Implantology 43, no. 2 (April 1, 2017): 107–13. http://dx.doi.org/10.1563/aaid-joi-d-16-00129.

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This study evaluates the load fatigue performance of different abutment–implant connection implant types—retaining-screw (RS) and taper integrated screwed-in (TIS) types under 3 applied torque levels based on the screw elastic limit. Three torque levels—the recommended torque (25 Ncm), 10% less, and 10% more than the ratio of recommended torque to screw elastic limits of different implants were applied to the implants to perform static and dynamic testing according to the ISO 14801 method. Removal torque loss was calculated for each group after the endurance limitation was reached (passed 5 × 106 cycles) in the fatigue test. The static fracture resistance results showed that the fracture resistance in the TIS-type implant significantly increased (P &lt; .05) when the abutment screw was inserted tightly. The dynamic testing results showed that the endurance limitations for the RS-type implant were 229 N, 197 N, and 224 N and those for the TIS-type implant were 322 N, 364 N, and 376 N when the screw insertion torques were applied from low to high. The corresponding significant (P &lt; .05) removal torque losses for the TIS-type implant were 13.2%, 5.3%, and 2.6% but no significant difference was found for the RS-type implant. This study concluded that the static fracture resistance and dynamic endurance limitation of the TIS-type implant (1-piece solid abutment) increased when torque was applied more tightly on the screw. Less torque loss was also found when increasing the screw insertion torque.
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Cosola, Saverio, Paolo Toti, Enrico Babetto, Ugo Covani, Miguel Peñarrocha-Diago, and David Peñarrocha-Oltra. "In-Vitro Investigation of Fatigue and Fracture Behavior of Transmucosal versus Submerged Bone Level Implants Used in Fixed Prosthesis." Applied Sciences 11, no. 13 (July 3, 2021): 6186. http://dx.doi.org/10.3390/app11136186.

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Background: The present in vitro study aimed to investigate the fatigue performance of different dental fixtures in two different emergence profiles. Biological failures are frequently reported because the problem canonly be solved by replacing a failing implant with a new one. Clinicians addressed minor mechanical failures, such as bending, loosening or the fracture of screws, abutment, or the entire prosthesis, by simply replacing or fixing them. Methods: Transmucosal and submerged bone-level dental implants underwent fatigue strength tests (statical and dynamical performance) by a standardized test: UNI EN ISO 14801:2016. Two types of emergence profiles (Premium sub-crestal straight implant with a cylindrical-shaped coronal emergence or Prama one-piece cylindrical-shape implant with transmucosal convergent neck and hyperbolic geometry) were tested, and dynamic fatigue were run to failure. Data was analyzed by a suitable statistical tool. Results: The Wöhler curve of 0.38 cm Premium group c2, appeared to be significantly different from that of the 0.38 cm Prama group c3 (nonparametric one-way ANOVA χ2 = 6; degree of freedom = 1; probability = 0.0043) but not from that of the 0.33 cm Premium group c1 (nonparametric one-way ANOVA χ2 = 0.62; degree of freedom = 1; probability = 0.4328). Fatigue performance of configuration 2 was one and a half times better than that of configuration 3. Group c3 had a better ultimate failure load (421.6 ± 12.5 N) than the other two settings i.e., c1 (324.5 ± 5.5 N) and c2 (396.3 ± 5.6) reaching almost a nonsignificant level. Conclusions: It was observed that a transmucosal implant design could provide the highest resistance to static fracture. On the other hand, an equicrestal implant design could increase dynamic endurance.
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Bayata, Fatma, and Cengiz Yildiz. "The Mechanical Behaviors of Various Dental Implant Materials under Fatigue." Advances in Materials Science and Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/5047319.

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The selection of materials has a considerable role on long-term stability of implants. The materials having high resistance to fatigue are required for dental implant applications since these implants are subjected to cyclic loads during chewing. This study evaluates the performance of different types of materials (AISI 316L stainless steel, alumina and its porous state, CoCr alloys, yttrium-stabilized zirconia (YSZ), zirconia-toughened alumina (ZTA), and cp Ti with the nanotubular TiO2 surface) by finite element analysis (FEA) under real cyclic biting loads and researches the optimum material for implant applications. For the analysis, the implant design generated by our group was utilized. The mechanical behavior and the life of the implant under biting loads were estimated based on the material and surface properties. According to the condition based on ISO 14801, the FEA results showed that the equivalent von Mises stress values were in the range of 226.95 MPa and 239.05 MPa. The penetration analysis was also performed, and the calculated penetration of the models onto the bone structure ranged between 0.0037389 mm and 0.013626 mm. L-605 CoCr alloy-assigned implant model showed the least penetration, while cp Ti with the nanotubular TiO2 surface led to the most one. However, the difference was about 0.01 mm, and it may not be evaluated as a distinct difference. As the final numerical evaluation item, the fatigue life was executed, and the results were achieved in the range of 4 × 105 and 1 × 109 cycles. These results indicated that different materials showed good performance for each evaluation component, but considering the overall mechanical performance and the treatment process (implant adsorption) by means of surface properties, cp Ti with the nanotubular TiO2 surface material was evaluated as the suitable one, and it may also be implied that it displayed enough performance in the designed dental implant model.
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Katzenbach, Anne, Istabrak Dörsam, Helmut Stark, Christoph Bourauel, and Ludger Keilig. "Fatigue behaviour of dental crowns made from a novel high-performance polymer PEKK." Clinical Oral Investigations 25, no. 8 (January 28, 2021): 4895–905. http://dx.doi.org/10.1007/s00784-021-03797-9.

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Abstract Objectives The aim of this study was, firstly, to analyse the long-time fatigue behaviour of crowns constructed from a novel polyetherketoneketone (PEKK) polymer, using artificial prepared teeth. Secondly, to determine the effect of the material’s stiffness that used as an artificial prepared tooth on the fatigue life of the PEKK crowns in comparison to human prepared teeth. Methods Veneered crowns with a PEKK framework were constructed on three different prepared teeth: artificial polymethyl methacrylate (PMMA) teeth, artificial CoCr teeth and extracted human teeth. As far as applicable, the loading protocol was based on EN ISO 14801:2007 for fatigue testing of dental implants. After initial static fracture tests on three specimens from each group, the remaining crowns were loaded with different force levels until fracture or until 2 × 106 loading cycles were reached. The number of loading cycles until failure was recorded. Wöhler curves were created to display the fatigue limits. Results Static fracture limits as well as fatigue limits differed for all three core materials. The static fracture tests resulted in fracture limits of 1200 (± 293) N for the PMMA group, 1330 (± 219) N for the CoCr group and 899 (± 96) N for the human tooth group. Fatigue limits of 770 N, 840 N and 720 N were determined for the PMMA group, CoCr group and human tooth group, respectively. Conclusions The determined fatigue limit of above 720 N (depending on the core material) is sufficiently high and a good performance of this crown material is expected in the clinical loading life. The results showed that using artificial teeth instead of natural teeth for fatigue testing of crowns might result in an overestimation of the fatigue limits of the crown material. Clinical relevance PEKK-made crowns offer a stable and priceworthy treatment for patients, in particular those that suffer from metal allergy.
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Xia, Wei Hong, Hui Hong He, and Yi Zheng. "Environmental Quality Management by ISO14001." Advanced Materials Research 663 (February 2013): 844–48. http://dx.doi.org/10.4028/www.scientific.net/amr.663.844.

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The course Environmental Quality Management by ISO 14001 is a special course offered to students majoring in Environmental Engineering. It aims to let students grasp basic knowledge on ISO 14001, including mode of ISO 14001, content of ISO 14001, planning, establishing and performing of it. ISO 14000 (made by International Standard Organization), has been enacted to protect the environment through environmental quality management, among which ISO14001 is the most important section. With increasing damage of the environment across the world, ISO 14001 was revised in 1996, the new version was carried out in 2006. Therefore, this course requires construction in accordance with the revised new ISO 14001 version to keep up with environment quality management nowadays.
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Alnavis, Noviana Bayu, Dwi Nowo Martono, and Udi Syahnoedi Hamzah. "Recommendations for Improving the ISO 14001 Certification Based on the Company’s Perception Analysis of the Certification Obstacles and Benefits." JURNAL KESEHATAN LINGKUNGAN 13, no. 3 (July 31, 2021): 132. http://dx.doi.org/10.20473/jkl.v13i3.2021.132-141.

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Introduction: Environmental management systems (EMS) were used commonly by companies to control industrial impacts and support environmental sustainability. In achieving SDG’s indicators to focuses on improving sustainable practices in the company environment, the government faces a tough challenge in increasing ISO 14001 certified companies. This study aimed to analyze the barriers and benefits of ISO 14001 certification in the industrial sector and recommend encouraging companies to carry out ISO 14001 certification. Methods: This study used a descriptive analysis method to identify the perception of ISO 14001 certified company practitioners of the certification barriers and benefits. Through survey questionnaires, data collection was conducted to 83 ISO14001 certified companies with a response rate of 49.4%. Results and Discussion: The main barrier in performing the ISO 14001 was the cost of implementation and certification. The highest benefit of ISO 14001 certification was to improve the company's image. A total of 83% of the companies believed that the benefits of ISO 14001 certification outweighed the costs incurred. Conclusion: The companies did not have significant barriers in conducting the ISO 14001 certification and classified into the medium category. The ISO 14001 certification could provide environmental sustainability, social, market, and economic benefits. The government needs to support the interest of companies in conducting the ISO 14001 implementation by overcoming the obstacles and maximizing the benefits.
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Pojasek, Robert B. "Introducing ISO 14001 III." Environmental Quality Management 17, no. 1 (2007): 75–82. http://dx.doi.org/10.1002/tqem.20154.

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To, W. M., and Margaret N.F. Tang. "The adoption of ISO 14001 environmental management systems in Macao SAR, China." Management of Environmental Quality: An International Journal 25, no. 2 (March 4, 2014): 244–56. http://dx.doi.org/10.1108/meq-01-2013-0002.

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Purpose – The purpose of this paper is to investigate the adoption of ISO 14001 environmental management systems in Macao SAR, China. Design/methodology/approach – Using the data from the latest ISO Survey of Certifications, the study identified the growth pattern of ISO 14001 certifications in Macao SAR by nonlinear regression. The study also examined the motivations for Macao's organizations to adopt ISO 14001 and the perceived benefits of implementing ISO 14001 using a quantitative survey instrument, and follow-up interviews with environmental management representatives. Findings – The trend analysis revealed that the adoption of ISO 14001 follows a logistic function. The survey results showed that the top motivating factors included promoting environmental awareness among employees, better managing environmental regulatory compliance, and improving efficiency while the greatest perceived benefit of implementing ISO 14001 was in enhancing employees’ awareness on pertinent environmental regulations, followed by enhancing employees’ environmental awareness, enhancing organizational image, and assisting management to deal with environmental issues. Research limitations/implications – Macao is a special administration region and is the only China's city with legalized casino gaming. Hence, the findings of the study cannot be generalized to other parts of China. Practical implications – Understanding what motivate organizations to adopt ISO 14001 and how organizations perceive the benefits of implementing ISO 14001 are crucial to the promotion of environmental management and sustainable development. The findings of the study revealed the key motivating factors and perceived benefits. Originality/value – The study contributes to the environmental management literature by exploring the growth pattern of ISO 14001 in Macao SAR, and the motivations for, perceived benefits, and difficulties of implementing ISO 14001 in organizational settings.
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Maletic, Matjaž, Manja Podpečan, and Damjan Maletic. "ISO 14001 in a corporate sustainability context: a multiple case study approach." Management of Environmental Quality: An International Journal 26, no. 6 (September 14, 2015): 872–90. http://dx.doi.org/10.1108/meq-08-2014-0129.

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Purpose – The purpose of this paper is to investigate the mechanisms through which ISO 14001 can contribute to the corporate sustainability. In this regard, the paper examines the underlying theoretical concepts and discusses the ISO 14001 in the context of the corporate sustainability. Additionally, the paper discusses the benefits of ISO 14001 from the perspective of the triple bottom line. Design/methodology/approach – The paper uses a multiple case study approach focusing on four ISO 14001-certified Slovenian organizations and two non-ISO 14001-certified organizations. The data collection methods included semi-structured questionnaire and interviews with managers in all studied organizations. Findings – It is suggested that the motives could be perceived as explanatory variables of the benefits realized from ISO 14001 certification. Further, the findings of this study indicate that environmental management system should be seen in a wider perspective that includes elements such as quality and social responsibility. Moreover, the results also lead us to the suggestion that there could be a reciprocal causal mechanism linking the environmental performance and economic performance. Practical implications – ISO 14001 can be an effective tool for pursuing sustainable development; however, organizations should move a step beyond ISO 14001’s environmental focus and recognize a multidimensional perspective by simultaneously addressing environmental, quality and social responsibility issues. Originality/value – The paper contributes to the corporate sustainability literature by investigating the mechanisms through which organizations can shift to more sustainable patterns using the ISO 14001.
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Santos, Laura Lyra, Rita de Cássia Coelho de Almeida Akutsu, Raquel Braz Assunção Botelho, and Renata Puppin Zandonadi. "Food service compliance with ISO 14001 and ISO 22000." Revista de Nutrição 25, no. 3 (June 2012): 373–80. http://dx.doi.org/10.1590/s1415-52732012000300007.

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OBJECTIVE: The objective of this study was to assess food service environmental and food safety management systems according to two checklists based on ABNT ISO 22000 and 14001. METHODS: This exploratory and descriptive study investigated a-la-carte food services of the Federal District, Brazil. Two checklists were developed to investigate ISO 14001 and 22000 compliance. A total of 37 food services were selected from the list of the Brazilian Association of Bars and Restaurants by simple random sampling. Checklist results were analyzed according to ANVISA resolution nº 275/2002. RESULTS: Only five food services employed dietitians to supervise meal production. These establishments achieved the highest ISO compliance. However, no establishment had more than 50% ISO 14001 or 22000 compliance. Restaurants showed little concern for the environment and disobeyed waste disposal laws by not separating recyclables from non-recyclables. CONCLUSION: The study food services do not have safe meal production systems, evidenced by non-conformity with the reference standards. Additionally, they do not attempt to reduce the environmental impact of their wastes. Food services supervised by dietitians are better prepared to produce safe foods.
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Khairunnisa, Shifa, Sri Widaningrum, and Heriyono Lalu. "PERANCANGAN SOP AUDIT INTERNAL BERDASARKAN INTEGRASI ISO 9001:2015 (KLAUSUL 9.2) DAN ISO 14001:2015 (KLAUSUL 9.2) DENGAN MEMPERTIMBANGKAN RISIKO MENGGUNAKAN METODE BENCHMARK DI CV XYZ." Jurnal Rekayasa Sistem & Industri (JRSI) 3, no. 02 (April 19, 2016): 38. http://dx.doi.org/10.25124/jrsi.v3i02.30.

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CV XYZ adalah perusahaaan yang bergerak di bidang manufaktur yang menerapkan ISO 9001:2008 dan akan menerapkan ISO 9001:2015 dan 14001:2015 karena perubahan standar ISO serta dalam upaya perbaikan berkelanjutan di CV XYZ. Perbaikan berkelanjutan dapat didukung oleh keberhasilan proses audit internal. Pada penelitian terdahulu dihasilkan SOP audit internal berdasarkan integrasi standar ISO 9001:2008 dan 14001:2004 sehingga perlu diperbaharui karena perubahan standar ISO dan agar sesuai dengan kondisi dan kebutuhan perusahaan saat ini. Hal ini mendasari perancangan SOP audit internal berdasarkan ISO 9001:2015 Klausul 9.2 dan ISO 14001:2015 Klausul 9.2 yang telah mempertimbangkan risiko melalui metode benchmarking terhadap perusahaan yang telah mengimplementasikan proses audit internal secara continue. Perancangan SOP diawali dengan mengintegrasikan ISO 9001:2015 Klausul 9.2 dengan ISO 14001:2015 Klausul 9.2 sehingga didapatkan requirement audit internal terintegrasi sebagai acuan perancangan proses bisnis audit internal hasil benchmarking menjadi proses bisnis audit internal sesuai requirement integrasi. Selanjutnya dilakukan risk assessment pada proses bisnis tersebut sehingga menghasilkan risk register yang menjadi input pada proses perancangan SOP sehingga dihasilkan SOP audit internal berdasarkan ISO 9001:2015 Klausul 9.2 dan 14001:2015 Klausul 9.2 dengan mempertimbangkan risiko. Hasil penelitian ini telah terverifikasi memenuhi requirement ISO 9001:2015 dan 14001:2015, sesuai kebutuhan CV XYZ serta telah mengantisipasi risiko kegagalan proses audit internal di CV XYZ. Manfaat penelitian ini adalah CV XYZ memiliki SOP audit internal yang dapat menjamin proses audit internal dilaksanakan secara efektif.
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Đurić, Jelena. "PRIMER PRIMENE ISO STANDARDA 14001:2015." Zbornik radova Fakulteta tehničkih nauka u Novom Sadu 35, no. 12 (December 7, 2020): 2232–35. http://dx.doi.org/10.24867/10hz01djuric.

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Standard ISO 14001 danas je naj­rašireniji međunarodno prihvaćen standard za uprav­ljanje životnom sredinom. Implementacijom ISO 14001 utvrđuje se koji od procesa u kompaniji zagađuju životnu sredinu, određuju se realni ciljevi i uvode se neophodne mere koje podpomažu ostvarenje ciljeva. U radu je opisana procena rizika zagađujućih materija u vazduhu toplovodnih kotlova u JKP „Novosadska toplana”. Cilj rada jeste da se prikažu dobijeni rezulzati analize procene rizika primenom ISO standarda 14001:2015.
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Maryeska, Cut Putri, Dian Rahayu Jati, and Suci Pramadita. "Analisis Transisi Penerapan Sistem Manajemen Lingkungan ISO 14001 Versi 2015 (Studi Kasus : PT.AZ) (Transition Analysis on Application of The Environmental Management System ISO 14001 2015 Version (Case Study : PT. AZ))." Jurnal Teknologi Lingkungan Lahan Basah 8, no. 1 (March 3, 2020): 001. http://dx.doi.org/10.26418/jtllb.v8i1.39119.

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Every ISO standard will be evaluated every 5 years to decide whether a revision is needed in order to keep the relevance toward today’s marketplace. In 2015, ISO issued the latest international standard version of EMS ISO 14001: 2015 and officially substitute the older version which was ISO 14001:2004. ISO 14001:2015 meets the objectives by drawing together relevant external and internal issues (4.1) with the requirements of interested parties (4.2). These address the concept of preventive action and in part establishes the context for the EMS (4.3) in the organization. Ever since the 2015 version was released, the organization has 3 years to make the transition from the 2004 version to the latest version until September 2018. This research analysis was carried out using a checklist by the Global Environmental Management Initiative (GEMI) to measure the implementation of EMS ISO 14001;2015 then categorize the result to the predefined category which are initial compliance level, transition level, and advanced level. The result shows the entire level of implementation ISO 14001:2015 on PT. AZ was categorized into an advanced level with score 169 but seen from the lowest percentage was on clause 4 Context of the Organization which was a new clause in the 2015 version. Thus, the 3 years transition period was not enough for the organization to entirely implement the standard.Keywords: Environmental Management System, ISO 14001, Transition. AbstrakSeluruh standar ISO dilakukan evaluasi dan peninjauan setiap 5 tahun untuk menjaga relevansi terhadap pasar. Sehingga pada tahun 2015 lalu, ISO mengeluarkan standar internasional SML versi baru yaitu ISO 14001:2015 dan secara resmi menggantikan standar sebelumnya yaitu ISO 14001:2004. ISO 14001:2015 lebih memerhatikan isu-isu lingkungan melalui dua klausul baru yaitu konteks organisasi dimana organisasi harus menentukan isu eksternal dan internal (4.1) serta memerhatikan kebutuhan dan harapan dari pihak berkepentingan (4.2). Hal ini merupakan tindakan preventif mencapai konteks bagi SML (4.3) di organisasi tersebut. Sejak dikeluarkan pembaharuan pada September 2015, organisasi diberikan waktu untuk melakukan transisi dari standar lama ke standar versi selama 3 tahun yaitu hingga tahun 2018. Penelitian ini dianalisis menggunakan checklist yang dikeluarkan oleh Global Environmental Management Initiative (GEMI) untuk menilai implementasi SML ISO 14001 :2015 lalu mengkategorikan hasil penilaian pada kategori yang telah ditentukan yaitu tingkat pemenuhan awal, tingkat transisi, dan tingkat lanjut. Hasil penilaian menunjukkan bahwa secara keseluruhan penerapan ISO 14001 :2015 di PT. AZ berada kategori tingkat lanjut dengan skor 169 tetapi jika dilihat presentase penerapan terendah ada pada klausul 4 Konteks Organisasi yang merupakan klausul baru di versi 2015. Dengan demikian, masa transisi selama 3 tahun masih belum cukup bagi perusahaan untuk mengidentifikasi dan menerapkan seluruh persyaratan dalam klausul baru. Kata Kunci : ISO 14001, Sistem Manajemen Lingkungan, Transisi
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Mansour, Mohamed, and Saleh Alsulamy. "EVALUATING ASSOCIATION BETWEEN IMPLEMENTATION OF ISO 14031 GUIDELINES AND ISO 14001 CERTIFICATION BY INDUSTRIAL SECTOR IN SAUDI ARABIA." Journal of Environmental Engineering and Landscape Management 29, no. 1 (April 7, 2021): 61–71. http://dx.doi.org/10.3846/jeelm.2021.14123.

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Conflicting research results regarding the application of environmental management systems on the environmental performance of industrial organizations between positive, negative, and no effect made studying this relationship a complex research problem. This study aimed to assess the extent of the commitment of industrial organizations in Saudi Arabia in applying ISO 14031:2013 guidelines to evaluate environmental performance and to study the association between the guideline implementation by ISO 14001:2015 certified and uncertified organizations. Using the descriptive approach, the association was identified between 13 independent variables representing ISO 14031:2013 guidelines for environmental performance evaluation and ISO 14001:2015 certification based on a 596 organizations survey conducted from May to December 2020, in addition to comparing the results of the study with similar studies. The results showed a medium positive correlation of ISO 14031 measurement variables with ISO 14001 certification. The study answered the question concerning the association of implementing of ISO 14031 guidelines to evaluate the environmental performance of ISO 14001 certified or uncertified organizations. Limited resources organizations should focus on monitoring environmental indicators and concentrate of planning activities to ensure the organizations uses environmental condition indicators data efficiently. Future studies are necessary to determine causal relationships, to develop specific environmental performance measures, and to integrate ISO 14031 in ISO 14001.
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Riaz, Hammad, Abubakr Saeed, Muhammad Baloch, Nasrullah, and Zeeshan Khan. "Valuation of Environmental Management Standard ISO 14001: Evidence from an Emerging Market." Journal of Risk and Financial Management 12, no. 1 (January 29, 2019): 21. http://dx.doi.org/10.3390/jrfm12010021.

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ISO 14001 (Environmental Management Standard) helps corporations to build legitimacy and goodwill, and can be also viewed as an organizational response to institutional pressure to act proactively towards the environment. The purpose of this paper is to investigate how investors in the emerging country value voluntary environmental management standard ISO 14001 certification. The impact of voluntary environmental management standard ISO 14001 on market performance is still not clear. By using event study methodology, this study matched ISO-certified firms with non-certified ones based on three different matching principles that include return on assets, size, and industry. The findings indicated that investors negatively valued ISO 14001 in both the short and long run. The study recommended policy implications for managers, policy makers, and non-government organizations.
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Furrer, Bettina, and Heinrich Hugenschmidt. "Financial Services and ISO 14001." Greener Management International 1999, no. 28 (December 1, 1999): 32–41. http://dx.doi.org/10.9774/gleaf.3062.1999.wi.00006.

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KOBAYASHI, NORIYUKI. "Housing Construction and ISO 14001." Wood Preservation 24, no. 1 (1998): 31–34. http://dx.doi.org/10.5990/jwpa.24.31.

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Santos, Cicera Maria Gomes dos, and Alexandre De Oliveira e. Aguiar. "ISO 14001 and international trade." Independent Journal of Management & Production 10, no. 1 (February 1, 2019): 022. http://dx.doi.org/10.14807/ijmp.v10i1.825.

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The purpose of this paper is to study potential association between international trade and ISO 14001 certification. The study is based upon a search conducted by International Organization for Standardization (ISO) performed in 2013, which includes responses from 110 countries in 11 languages. At this time, among all topics from the research, the variables studied were motivations for implementation and the benefits achieved. These data were crossed with features of international business trade to identify its real outcome. The null hypothesis to be tested is that there was no correlation or association between international trade and the studied variables. Results show that there were 16 weak correlations between motivations to implement ISO 14001 and international trade. The survey result shows that there are weak correlations among countries international trade and motives to get certification. Because the degrees of correlation are low, there is reason to further studies, what could probably include multivariate techniques. Anyway, the study suggests that some of the expected results and benefits for the business were not achieved or were achieved at degrees lower than expected in countries where trade is higher. Regarding motivations to implement the survey confirmed that attending to customers’ and stakeholders’ interests is an important driver for companies that export.
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Jorgensen, Tine Herreborg. "ISO 14001: time for improvements?" International Journal of Environment and Sustainable Development 6, no. 3 (2007): 254. http://dx.doi.org/10.1504/ijesd.2007.015305.

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Russo, Michael V., and Michelle A. Noble. "Antecedents of ISO 14001 Registration." Proceedings of the International Association for Business and Society 10 (1999): 497–508. http://dx.doi.org/10.5840/iabsproc19991046.

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Bahmed, Lylia, Mébarek Djebabra, Leila Boubaker, and Ali Boukhalfa. "Implementing the ISO 14001 certification." Management of Environmental Quality: An International Journal 20, no. 2 (February 27, 2009): 156–65. http://dx.doi.org/10.1108/14777830910939462.

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Price, Trevor J. "ISO 14001: Transition to champion?" Environmental Quality Management 16, no. 3 (2007): 11–23. http://dx.doi.org/10.1002/tqem.20128.

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Sorooshian, Shahryar, Lim Cai Qi, and Lee Li Fei. "Characterization of ISO 14001 implementation." Environmental Quality Management 27, no. 3 (March 2018): 97–105. http://dx.doi.org/10.1002/tqem.21532.

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Foster, Scott. "Registrars, Accreditation, and ISO 14001." Environmental Quality Management 6, no. 1 (1996): 63–75. http://dx.doi.org/10.1002/tqem.3310060110.

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Tansey, Deborah A., and Marc H. Wendell. "ISO 14001 EMS implementation planning." Environmental Quality Management 6, no. 2 (1996): 1–9. http://dx.doi.org/10.1002/tqem.3310060202.

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Ellis, Richard A. "ISO 14001 and federal facilities." Federal Facilities Environmental Journal 12, no. 1 (2001): 113–17. http://dx.doi.org/10.1002/ffej.3330120111.

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Glover Ritzert, Connie. "Decision points in ISO 14001." Environmental Quality Management 9, no. 3 (2000): 65–74. http://dx.doi.org/10.1002/1520-6483(200021)9:3<65::aid-tqem7>3.0.co;2-d.

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Howe, R. "ISO 14001: the green standard." Computer 30, no. 11 (1997): 133–34. http://dx.doi.org/10.1109/2.634868.

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Orcos, Raquel, and Sergio Palomas. "The impact of national culture on the adoption of environmental management standards." Cross Cultural & Strategic Management 26, no. 4 (December 5, 2019): 546–66. http://dx.doi.org/10.1108/ccsm-10-2018-0168.

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Purpose The purpose of this paper is to explore how national cultures contribute to explain the uneven diffusion of ISO 14001 across countries. The paper focuses on two of the cultural dimensions developed by the global leadership and organizational behavior effectiveness (GLOBE) project, namely, performance orientation and institutional collectivism. Design/methodology/approach A database containing information about the diffusion of ISO 14001 in 52 countries during the period 1999–2016 was built to carry out this research. The countries considered in this study represent about 90 percent of worldwide ISO 14001 certifications. The information was gathered from publicly available data sources: the ISO Survey, published every year by the International Organization for Standardization, the world development indicators of the World Bank, the cultural dimensions of the GLOBE project and the Index of Economic Freedom provided by The Heritage Foundation. Findings This research finds that both performance orientation and institutional collectivism influence the diffusion of ISO 14001. Whereas performance orientation slows down the diffusion of ISO 14001, institutional collectivism speeds it up. Additionally, this research shows that the slowing effect of performance orientation decreases in strength over time, while the accelerating effect of institutional collectivism becomes stronger. Originality/value The study adds to the understanding of the influence of national culture on the diffusion of environmental management standards, with an emphasis on ISO 14001. A key contribution of this research is that it explores how the influence of cultural dimensions change over time as a result of the development and maturation of ISO 14001.
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Yusoff, Sumiani, Ridwan Nordin, and Haslinda Yusoff. "Environmental Management Systems (EMS) ISO 14001 Implementation in Construction Industry: A Malaysian Case Study." Issues In Social And Environmental Accounting 9, no. 1 (March 31, 2015): 18. http://dx.doi.org/10.22164/isea.v9i1.97.

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This study seeks to explore the crucial part in EMS implementation; i.e. environmental aspects and impacts, Good Environmental Practice to be developed in construction site, as well as the level of awareness or understanding amongst site staffs on ISO 14001 EMS implementation in their organizations. Data were collected via interviews, surveys and site visits. A number of environmental aspects and impacts, and Good Environmental Practices based on ISO 14001:2004 have been identified. The level of understanding of the site staffs on ISO 14001 EMS requirements has been found to be good except for matters concerning Schedule Waste Management. In conclusion, the successful implementation of ISO 14001 EMS mainly depends on staffs‘ understanding.<br /><br />
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