The insertion torque-depth curve integral as a measure of implant primary stability: An in vitro study on polyurethane foam blocks

Stefano, Danilo Alessio Di; Arosio, Paolo; Gastaldi, Giorgio; Gherlone, Enrico

doi:10.1016/j.prosdent.2017.04.012

Cited by 51 publications

(70 citation statements)

References 22 publications

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“…The greater the RBH, the greater the implant primary stability. Furthermore, results of the present study confirm previous findings of a significant correlation between (I) and IT throughout the range of density in the arches . Both (I) and IT were consistently significantly higher in the group having RBH ≥ 4 mm.…”

Section: Discussionsupporting

confidence: 91%

“…Furthermore, results of the present study confirm previous findings of a significant correlation between (I) and IT throughout the range of density in the arches. 22 Both (I) and IT were consistently significantly higher in the group having RBH 4 mm. The lack of a significant difference in implant primary stability between sites with an RBH between 2 and 4 mm and those whose RBH was between 4 and 6 mm may be related to a combination of factors.…”

Section: ) Bone Concomitant With Sinus Augmentationmentioning

confidence: 83%

See 1 more Smart Citation

Sinus augmentation and concomitant implant placement in low bone‐density sites. A retrospective study on an undersized drilling protocol and primary stability

Arosio¹,

Greco²,

Zaniol³

et al. 2017

Clin Implant Dent Rel Res

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Section: Discussionsupporting

confidence: 91%

Section: ) Bone Concomitant With Sinus Augmentationmentioning

confidence: 83%

Sinus augmentation and concomitant implant placement in low bone‐density sites. A retrospective study on an undersized drilling protocol and primary stability

Arosio¹,

Greco²,

Zaniol³

et al. 2017

Clin Implant Dent Rel Res

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“…This study did not investigate sites that required further preparation of the osteotomies. Regarding the models, one in vitro study was carried out in bone surrogates which is an often-used laboratory model for proof of concept implant testing [22][23][24] since it allows to perform the experiments under controlled parameters. Albeit bone surrogates do not fully replicate the mechanical properties of human bone, they are intended to provide consistent and uniform material with properties in the range of human cancellous bone [25].…”

Section: Discussionmentioning

confidence: 99%

A New Site Preparation Protocol That Supports Bone Quality Evaluation and Provides Predictable Implant Insertion Torque

Velikov¹,

Susin

Heuberger³

et al. 2020

JCM

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When preparing an implant site, clinicians often base their assessment of the bone on subjective tactile and visual cues. This assessment is used to plan the surgical procedure for site preparation, including how many drilling steps will be used. The subjective nature of bone evaluation, consequently, results in poor reproducibility and may lead to under or over preparation of the site. Recently, an unconventional site preparation protocol was developed in which the decision of which instruments to use is dictated by insertion torque of the novel site preparation instrument (OsseoShaper ™ , Nobel Biocare AB, Gothenburg, Sweden). The aim of this study was to quantify the correlation of the site preparation torques of the new instrument with bone density and maximum implant insertion torques. In vitro and in vivo data showed strong linear correlation between site preparation torque and density and resulted in reliable implant insertion torques, respectively. From our analysis, we conclude that this new instrument and protocol has the potential to eliminate the need for additional intraoperative bone evaluation and may reduce the risk of inadequate preparation of the site due to the ability to serve as a predictor of the final implant insertion torque.profile combined with a cutting flute and unconventional site preparation protocol. Following the pilot drill, the osteotomy is shaped with an implant-specific single use instrument, OsseoShaper1 (OS1), without irrigation at low speed (25-100 rpm) using a motorized drill unit with a maximum torque setting of 40 Ncm (Figure 1). The OS1 torque, measured by a drill unit with real-time torque display, determines the workflow for implant placement. If the OS1 achieves the desired depth and position with less than 40 Ncm, the implant can be placed. If the OS1 torque reaches 40 Ncm before it reaches the planned position, the next instrument should be used to further shape the implant site.

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“…Bone density has been correlated to the amount of bone-to-implant contact (BIC) [19], and BIC to the PS [17]. Bone density has been measured with the use of different techniques: insertion torque (IT), removal torque (RT), and resonance frequency analysis (RFA), producing a value giving the implant stability quotient (ISQ) [22]. Polyurethane foam has been recognized as a standard material for testing instruments by the American Society for Testing and Materials (ASTM F-1839-08) ("Standard specification for Rigid Polyurethane Foam for Use as a Standard Material for Test Orthopaedic Devices for Instruments").…”

Section: Introductionmentioning

confidence: 99%

“…Polyurethane foam has been widely used as an alternative material in biomechanical tests evaluating, for example, dental implants. It presents consistent mechanical characteristics, has features similar to bone tissue, is very reliable and easy to use, requiring no special handling, and is characterized by linearly elastic and constitutive isotropic symmetry [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Short vs. Standard Length Cone Morse Connection Implants: An In Vitro Pilot Study in Low Density Polyurethane Foam

Comuzzi¹,

Tumedei

Piattelli

et al. 2019

Symmetry

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The aim of the investigation was to evaluate the insertion torque, pull-out torque and implant stability quotient (ISQ) of short implants (SI) and standard length implants (ST) inserted into linearly elastic and constitutive isotropic symmetry polyurethane foam blocks. Short dental titanium implants with a Cone Morse connection and a conical shape (test implants: Test Implant A—diameter 5.5 mm and length 6 mm) (Test Implant B—diameter 5.5 mm and length 5 mm) were used for the present in vitro investigation. ST implants (4 mm diameter and 10 mm length), with a Cone Morse connection and a conical shape, were used as Control Implant A and as Control Implants B. These two latter implants had a different macro design. A total of 20 implants (5 Test A, 5 Test B, 5 Control A and 5 Control B) were used for the present research. The results were similar when comparing the Test A and Test B implants. The test implants had very good stability in polyurethane 14.88–29.76 kgm3 density blocks. The insertion torque values were very high for both types of test implant (25–32 Ncm on 14.88 kgm blocks, and up to 45 Ncm in 29.76 kgm3 blocks). The pull-out test values were very similar to the insertion torque values. The ISQ values were significantly high with 75–80 in 14.88 kgm3 blocks, and 78–83 in 29.76 kgm3 blocks. No differences were found in the values of the Control A and Control B implants. In both these implants, the insertion torque was quite low in the 14.88 kgm3 blocks (16–28 Ncm). Better results were found in the 29.76 kgm3 blocks. The pull-out values for these control implants were slightly lower than the insertion torque values. High ISQ values were found in both control implants (57–80). When comparing SI and ST implants, the SI had a similar if not better performance in low quality polyurethane foam blocks (14.88–29.76 kgm), corresponding to D3 and D4 bone.

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The insertion torque-depth curve integral as a measure of implant primary stability: An in vitro study on polyurethane foam blocks

Cited by 51 publications

References 22 publications

Sinus augmentation and concomitant implant placement in low bone‐density sites. A retrospective study on an undersized drilling protocol and primary stability

Sinus augmentation and concomitant implant placement in low bone‐density sites. A retrospective study on an undersized drilling protocol and primary stability

A New Site Preparation Protocol That Supports Bone Quality Evaluation and Provides Predictable Implant Insertion Torque

Short vs. Standard Length Cone Morse Connection Implants: An In Vitro Pilot Study in Low Density Polyurethane Foam

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