Influence of the dental implant macrogeometry and threads design on primary stability: an in vitro simulation on artificial bone blocks

Comuzzi, Luca; Tumedei, Margherita; Angelis, Francesco De; Lorusso, Felice; Piattelli, Adriano; Iezzi, Giovanna

doi:10.1080/10255842.2021.1875219

Cited by 10 publications

(5 citation statements)

References 43 publications

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“…Studies showed that the implant macrogeometry represents one of the most important factors for successfully achieving primary stability [ 35 , 36 ]. For this reason, the secondary outcome was to evaluate the impact of macro-topography on Ti-S surfaces, so the hGDFs’ proliferation and viability were measured on these discs, characterized by an additional linear (Ti-L) and waved grooved macrogeometry (Ti-W).…”

Section: Discussionmentioning

confidence: 99%

Influence of Nano, Micro, and Macro Topography of Dental Implant Surfaces on Human Gingival Fibroblasts

Petrini

Pierfelice

D’Amico

et al. 2021

IJMS

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Current research on dental implants has mainly focused on the influence of surface roughness on the rate of osseointegration, while studies on the development of surfaces to also improve the interaction of peri-implant soft tissues are lacking. To this end, the first purpose of this study was to evaluate the response of human gingival fibroblasts (hGDFs) to titanium implant discs (Implacil De Bortoli, Brazil) having different micro and nano-topography: machined (Ti-M) versus sandblasted/double-etched (Ti-S). The secondary aim was to investigate the effect of the macrogeometry of the discs on cells: linear-like (Ti-L) versus wave-like (Ti-W) surfaces. The atomic force microscopy (AFM) and scanning electron microscopy (SEM) analysis showed that the Ti-S surfaces were characterized by a significantly higher micro and nano roughness and showed the 3D macrotopography of Ti-L and Ti-W surfaces. For in vitro analyses, the hGDFs were seeded into titanium discs and analyzed at 1, 3, and 5 days for adhesion and morphology (SEM) viability and proliferation (Cck-8 and MTT assays). The results showed that all tested surfaces were not cytotoxic for the hGDFs, rather the nano-micro and macro topography favored their proliferation in a time-dependent manner. Especially, at 3 and 5 days, the number of cells on Ti-L was higher than on other surfaces, including Ti-W surfaces. In conclusion, although further studies are needed, our in vitro data proved that the use of implant discs with Ti-S surfaces promotes the adhesion and proliferation of gingival fibroblasts, suggesting their use for in vivo applications.

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Section: Discussionmentioning

confidence: 99%

Influence of Nano, Micro, and Macro Topography of Dental Implant Surfaces on Human Gingival Fibroblasts

Petrini

Pierfelice

D’Amico

et al. 2021

IJMS

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“…Bone atrophy of the alveolar ridges follows after tooth loss, especially in the jaw posterior regions. Hence, appropriate quantity and quality of the alveolar bone are needed to ensure the correct tridimensional implant positioning and obtain optimal esthetic and functional outcomes [ 14 , 17 , 18 ]. Several possible alternatives to treat bone atrophy are available, such as autogenous bone block onlays or inlays, guided bone regeneration (GBR) procedures, inferior alveolar nerve repositioning, distraction osteogenesis, sinus floor elevation (SFE), ridge-splitting, and bone expansion [ 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Insertion Torque, Removal Torque, and Resonance Frequency Analysis Values of Ultrashort, Short, and Standard Dental Implants: An In Vitro Study on Polyurethane Foam Sheets

Comuzzi¹,

Tumedei

Romasco

et al. 2022

JFB

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Short implants were introduced to reduce morbidity, treatment duration, and complex bone regeneration interventions in atrophic jaws and to improve patient-reported outcomes. This study aimed to determine the insertion torque (IT), removal torque (RT), and resonance frequency analysis (RFA) values of ultrashort (3 mm length), short (7 mm length), and standard implants (10 mm length) inserted in 1-, 2-, 3-, and 4-mm thickness polyurethane sheets with densities of 10, 20, and 30 pounds per cubic foot (PCF). Standard-length implants were the gold standard (control). Overall, short-length implant IT values were higher or similar to the control in most experimental conditions. Those inserted into a 3 mm/30 PCF lamina showed the highest IT values, whereas 5 mm diameter ultrashort-length implants inserted into 2 and 3 mm/20 PCF laminas were higher than other implants. RT values followed the same trend and RFA values were more appreciable in short- and standard-length implants in all the scenarios. However, ultrashort-length implants reached a primary stability comparable to that of standard implants in lower thicknesses. In conclusion, although further studies are needed to corroborate this in vitro model with preclinical and clinical studies, our data shed light on short- and ultrashort-length implants geometries to a potential application in critical atrophy of the posterior jaws.

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“…The literature shows that an ISQ < 45 indicates a poor primary stability, and values >65 are considered to be the most favorable for implant stability [1,38]. In particular, in accordance with the manufacturer and the previous literature, the Ostell measurements can be used to classify the implant stability as good with ISQ > 70, medium with ISQ 60-69, and low with ISQ < 60 [24,39,40]. The results of this work showed significantly higher RFA values for long implants, with respect to the short ones, in all conditions.…”

Section: Discussionmentioning

confidence: 80%

Fixture Length and Primary Stability: An In Vitro Study on Polyurethane Foam

Petrini

Tumedei

Cipollina³

et al. 2022

Applied Sciences

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(1) Background: Recently, novel dental implants that are characterized by different levels of surface roughness in the distinct parts of the fixture’s body have been introduced in the market. These surface characteristics could affect the primary stability of the implants. The aim of this in vitro study was to compare the primary stability of short and long implants, characterized by multiscale surface roughness, inserted on polyurethane blocks. The secondary aim was to understand if the implant length could be a crucial factor in the decision-making in immediate or rather than delayed loading protocol in the different bone densities. (2) Methods: A total of 20 cylindrical dental implants with a diameter of 5.0 mm were tested for the lengths 6.0 mm (short implants) versus 13.0 mm (long implants) on two different solid rigid polyurethane blocks (20 and 30 PCF). The primary stability was evaluated by measuring the insertion torque value (ITV), the removal torque (RTV), and the resonance frequency analysis RFA. (3) Results: The values of ITV, RTV, and RFA showed the same trend in all measurements. Long implants showed a significantly higher primary stability on 30 PCF blocks that present mechanical properties similar to high-density bone. On the contrary, no relevant differences were found on 20 PCF blocks, which mimic trabecular bone density. (4) Conclusions: The impact of fixture length on the primary stability of implants with multiscale surface roughness is significant in 30 PCF polyurethane corresponding to higher bone density, but not in lower ones.

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Influence of the dental implant macrogeometry and threads design on primary stability: an in vitro simulation on artificial bone blocks

Cited by 10 publications

References 43 publications

Influence of Nano, Micro, and Macro Topography of Dental Implant Surfaces on Human Gingival Fibroblasts

Influence of Nano, Micro, and Macro Topography of Dental Implant Surfaces on Human Gingival Fibroblasts

Insertion Torque, Removal Torque, and Resonance Frequency Analysis Values of Ultrashort, Short, and Standard Dental Implants: An In Vitro Study on Polyurethane Foam Sheets

Fixture Length and Primary Stability: An In Vitro Study on Polyurethane Foam

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