Fracture and Fatigue of Titanium Narrow Dental Implants: New Trends in Order to Improve the Mechanical Response

Velasco‐Ortega, Eugenio; Flichy-Fernández, Antonio Juan; Punset, Miquel; Jiménez-Guerra, Álvaro; Manero, José María; Gil, Javier

doi:10.3390/ma12223728

Cited by 18 publications

(12 citation statements)

References 30 publications

(44 reference statements)

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“…This fact suggests that the crack nucleation site changes from the specimen's surface (for the as-machined metal) to the specimen's interior (for the strained metal). This behavior is also shown in grit blasting dental implants, which also improves the osseointegration [19,[29][30][31]. This change is postulated to result in a significant modification of the fatigue properties of dental implants made of commercially pure Ti.…”

Section: Discussionmentioning

confidence: 74%

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Fatigue of Narrow Dental Implants: Influence of the Hardening Method

et al. 2020

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The use of narrow titanium dental implants (NDI) for small ridges, reduced interdental space, or missing lateral incisors can be a viable option when compared to the conventional wider dental implants. Furthermore, in many cases, standard diameter implant placement may not be possible without grafting procedures, which increases the healing time, cost, and morbidity. The aim of this study was to analyze the mechanical viability of the current narrow implants and how narrow implants can be improved. Different commercially available implants (n = 150) were tested to determine maximum strength, strain to fracture, microhardness, residual stress, and fatigue obtaining the stress–number of cycles to fracture (SN) curve. Fractography was studied by scanning electron microscopy. The results showed that when the titanium was hardened by the addition of 15% of Zr or 12% cold worked, the fatigue limit was higher than the commercially pure grade 4 Ti without hardening treatment. Grade 4 titanium without hardening treatment in narrow dental implants can present fractures by fatigue. These narrow implants are subjected to high mechanical stresses and the mechanical properties of titanium do not meet the minimal requirements, which lead to frequent fractures. New hardening treatments allow for the mechanical limitations of conventional narrow implants to be overcome in dynamic conditions. These hardening treatments allow for the design of narrow dental implants with enhanced fatigue life and long-term behavior.

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Section: Discussionmentioning

confidence: 74%

“…This work will help clinicians make a more informed choice when choosing a small-diameter implant system. Narrow dental implants increase their fracture risk due to their smaller diameter, which might compromise the prosthetic components and also lead to bone overloading [31].…”

Section: Discussionmentioning

confidence: 99%

Fatigue of Narrow Dental Implants: Influence of the Hardening Method

et al. 2020

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“…The use of narrow implants is widely documented in patients with deficient bone crestal width in which, for some reason (increased healing time, cost, or patient morbidity), the application of horizontal bone regenerative techniques is not indicated [17][18][19]. The mechanical strength of titanium narrow implants is sometimes not enough to support the dynamic forces.…”

Section: Introductionmentioning

confidence: 99%

Influence of Connection Type and Platform Diameter on Titanium Dental Implants Fatigue: Non-Axial Loading Cyclic Test Analysis

Nicolás-Silvente

Velasco‐Ortega

Ortiz-García

et al. 2020

IJERPH

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Two-pieces dental implants must provide stability of the implant-abutment-interface. The connection type and platform diameter could influence the biomechanical resistance and stress distribution. This study aims to evaluate the fatigue for different types of connections, external and internal, and different platform diameters. Three implant designs with the same length were used: (a) external hexagon/narrow platform; (b) internal double hexagon/narrow platform; (c) internal octagon/regular platform. A fatigue test was developed to establish the number of cycles needed before fracture. A 30º oblique load with a sinusoidal function of fatigue at a frequency of 15 Hz and 10% stress variation was applied to each system. The fatigue load limit (FLL) for design (a) was 190N, being the nominal-curvature-moment (NCM) = 1.045; FLL = 150 N, with a NCM = 0.825 for (b), and FLL = 325 N, with a NCM = 1.788 for (c). The platform diameter affects the FLL, obtaining lower FLL on a narrow platform. The connection type interferes with the implant walls’ width, especially in narrow implants, making internal connections more unstable at this level. Long-term clinical studies to assess the restoration’s success rate and survival are mandatory.

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“…However, despite a lower risk of peri-implant bone loss, the 3.5-mm model had higher peak stress on implants and abutments than the 2.9-mm model [15]. Thus, narrow implants up to 2.8 mm in diameter are not associated with any structural risk as compared to standard diameter implants [16].…”

Section: Discussionmentioning

confidence: 89%

Use of Extra-Narrow-Diameter Implants in Reduced Alveolar Ridge: A Case Report

Mattos¹,

Carvalho²,

Carvalho³

et al. 2020

JBNB

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Background: Narrow-diameter implants (3.0-3.5 mm range) have been introduced for the replacement of teeth with insufficient bone structure and/or limited mesiodistal or interimplant spaces, and appear to offer clinical results similar to those obtained with implants of greater diameter. Studies using extra-narrow-diameter implants (2.8 mm) are scarce. Case Presentation: A 59-year-old male patient received two extra-narrow-diameter implants, 2.8 × 11 mm in the region between elements 11 and 14. Together, two 3.5 × 8.5 mm SYSTHEX® platform 4.1 implants were installed in the region of elements 15 and 16 to provide greater stability in the occlusion. Of four previous implants on the maxillary left side, one in the region between the elements 23 and 24 that was located in a very apical position and vestibularized was removed. The provisional was already installed on the elements 11, 21, and 22 with the metal cores already prepared and with the Globteck® implants in the region of the elements 23, 24, and 27. The functional and esthetic results were satisfactory. Conclusions: Insertion of extra-narrow-diameter implants of 2.8 mm in the maxillary anterior region is a reliable option in a patient with absence of elements 12 and 13, restoring masticatory function and aesthetics in the upper arch.

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Fracture and Fatigue of Titanium Narrow Dental Implants: New Trends in Order to Improve the Mechanical Response

Cited by 18 publications

References 30 publications

Fatigue of Narrow Dental Implants: Influence of the Hardening Method

Fatigue of Narrow Dental Implants: Influence of the Hardening Method

Influence of Connection Type and Platform Diameter on Titanium Dental Implants Fatigue: Non-Axial Loading Cyclic Test Analysis

Use of Extra-Narrow-Diameter Implants in Reduced Alveolar Ridge: A Case Report

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