Bone Response to Static Compressive Stress at Bone-Implant Interface: A Pilot Study of Critical Static Compressive Stress

Ikumi, Noriharu; Suzawa, Tetsuo; Yoshimura, Kazuyoshi; Kamijo, Ryutarou

doi:10.11607/jomi.3715

Cited by 9 publications

(11 citation statements)

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“…The forces transferred to the implant‐bone interface will influence the bone remodeling through different cellular processes; these initial mechanical signals will initiate a sequence of biochemical reactions, which modulate bone formation and resorption. Static compressive forces even greater than 120 MPa produce a lower osteoclast response compared with dynamic forces of lower magnitudes . The appropriate biomechanical safety margin to avoid the initiation of the osteoclastic response induced by overload was calculated by Ikumi and Tsutsumi and was identified as the allowable stress formula where allowable stress (δa) is equal to the critical stress (δb) over the biomechanical safety factor (S).…”

Section: Transmission Of Forces To the Bone‐implant Interfacementioning

confidence: 99%

Effects of occlusal forces on the peri‐implant‐bone interface stability

Delgado-Ruíz

Calvo-Guirado

Romanos

2019

Periodontology 2000

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The Glossary of Prosthodontic Terms defines occlusion as the 'act or process of closure, being closed or shut off and the static relationship between the incising or masticating surfaces of the maxillary or mandibular teeth or tooth analogs'. 1 To achieve the dental occlusion, the skeletal and muscular systems work simultaneously to produce the mandibular movement, which transfers force to the prosthesis, teeth, implants, and adjacent supporting bone. 2 But the dental/implant occlusion is not just a simple contact between opposite surfaces. It is complex, and also includes the friction of multiple inclined planes and different force vectors (axial and nonaxial). 3 These force vectors occur simultaneously and are transient and therefore the concept of a unidirectional occlusal force should be replaced by the concept of multidirectional occlusal forces. 4 Additional forces of swallowing and sometimes parafunctions are applied to the system and overloading can appear. 2 Occlusal overload has been defined as the load greater than prostheses, implant components, or interface that tissues are capable of withstanding without damage. 1 For Laney, overload is occurring if the occlusal load exerted through function or parafunctions exceeds the resistance of the prosthesis, implant components, implant, and osseointegrated interface, resulting in structural or biological damage. 5 At the biological level, overload is produced when the amount of force overextends the adaptation capabilities of the host site. 6All the structures subject to occlusal forces can be exposed to physiological loading or overloading. 6 In the case of physiological loading, forces <3000 microstrains are dissipated through the occlusal surfaces, prosthetic structure, implant-abutment connection, retention screw, implant body, implant bone interface, and surrounding, supporting bone (Figure 1). 7 Meanwhile, overload strains >3000 microstrains might affect the weakest part of the system producing structural and/or biological failures. 8The applied occlusal bite forces are extremely difficult to quantify because they are not absolute and have great variability, which is influenced by factors such as duration, distribution, direction, and magnitude of forces. 9 Also, other factors such as the number and location of teeth and implants, their inclinations within the dental arch, the kind of restoration, and the bone quality can influence the resultant forces and therefore their accurate measurement. 10,11 In relation to the maximum biting forces produced in patients with osseointegrated implants, different magnitudes of occlusal forces have been recorded, with values ranging between 25 and 1000 N. [12][13][14][15][16][17][18][19][20][21][22][23] These studies agree that the forces transmitted by the anterior teeth are lower than those transmitted by the posterior teeth, that among the posterior teeth the second molar exerts the maximum levels of force, and that gender influences the bite force, with higher biting forces being generated by men compared with w...

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Section: Transmission Of Forces To the Bone‐implant Interfacementioning

confidence: 99%

Effects of occlusal forces on the peri‐implant‐bone interface stability

Delgado-Ruíz

Calvo-Guirado

Romanos

2019

Periodontology 2000

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“…New implant devices such as implant extenders have also been tested before clinical use [ 131 ]. The proximal tibia is commonly used for drilling protocols, to test the impact of drilling in early stages of osseointegration and implant stability [ 132 , 133 , 134 , 135 , 136 , 137 ], different implant surfaces [ 138 , 139 , 140 , 141 , 142 ], and biomechanical properties (insertion torque [ 133 ], response to compressive stress [ 143 ]).…”

Section: Appendix A1 Research In Non-human Primatesmentioning

confidence: 99%

Pre-Clinical Models in Implant Dentistry: Past, Present, Future

et al. 2021

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Biomedical research seeks to generate experimental results for translation to clinical settings. In order to improve the transition from bench to bedside, researchers must draw justifiable conclusions based on data from an appropriate model. Animal testing, as a prerequisite to human clinical exposure, is performed in a range of species, from laboratory mice to larger animals (such as dogs or non-human primates). Minipigs appear to be the animal of choice for studying bone surgery around intraoral dental implants. Dog models, well-known in the field of dental implant research, tend now to be used for studies conducted under compromised oral conditions (biofilm). Regarding small animal models, research studies mostly use rodents, with interest in rabbit models declining. Mouse models remain a reference for genetic studies. On the other hand, over the last decade, scientific advances and government guidelines have led to the replacement, reduction, and refinement of the use of all animal models in dental implant research. In new development strategies, some in vivo experiments are being progressively replaced by in vitro or biomaterial approaches. In this review, we summarize the key information on the animal models currently available for dental implant research and highlight (i) the pros and cons of each type, (ii) new levels of decisional procedures regarding study objectives, and (iii) the outlook for animal research, discussing possible non-animal options.

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“…In a case report, Bashutski et al [13] suspected implant failure due to excessive compressions introduced by the implant. These static compressions play a major role mainly in the early healing phase (about 1 month) and are subsequently reduced by resorption processes or by the viscoelastic response of the bone tissue [14]. Thus, a compromise between primary stability and induced compression must be found so that the early healing phase is not disturbed and long-term stability can be achieved.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study

et al. 2021

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Background: The aim is to evaluate methods to quantify the interstitial splitting force and thermal load input of self-tapping and self-drilling osteosynthesis screws. Methods: A specialized modular test bench was developed to measure the induced splitting force of self-drilling and self-tapping osteosynthesis screws using porcine mandibular bone. In addition, a fundamentally new approach to measure the temperature near the contact zone of osteosynthesis screws (fiber-optic sensor in the axis of the screw) was established. Results: The self-drilling screw type induces a splitting force of about 200 N in the surrounding tissue, so that microdamage of the bone and increased resorption can be assumed. Even pre-drilling induces a short-time force into the tissue, which is comparable to the splitting force of the self-tapping screw. The temperature increase in the screw is clearly higher compared to the temperature increase in the surrounding tissue, but no significant difference in temperature between the two screw types could be measured. Based on the measured temperatures of both screw types, the temperature increase in the contact zone is considered critical. Complications during the screwing process caused by the manual tool guidance resulted in numerous breakages of the fiber-optic sensors. Conclusions: The developed methods provide additional insight regarding the thermomechanical load input of self-drilling and self-tapping screws. However, based upon the optical fiber breakages, additional refinement of this technique may still be required.

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Bone Response to Static Compressive Stress at Bone-Implant Interface: A Pilot Study of Critical Static Compressive Stress

Cited by 9 publications

References 0 publications

Effects of occlusal forces on the peri‐implant‐bone interface stability

Effects of occlusal forces on the peri‐implant‐bone interface stability

Pre-Clinical Models in Implant Dentistry: Past, Present, Future

An Experimental Method to Determine the Interstitial Splitting Forces and Thermal Load Input Induced by Self-Tapping and Self-Drilling Bone Screws: A Pilot Study

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