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Primary stability, insertion torque and bone density of cylindric implant ad modum Branemark: Is there a relationship? An in vitro study

Identifieur interne : 003F67 ( Istex/Corpus ); précédent : 003F66; suivant : 003F68

Primary stability, insertion torque and bone density of cylindric implant ad modum Branemark: Is there a relationship? An in vitro study

Auteurs : Paolo Trisi ; Simona De Benedittis ; Giorgio Perfetti ; Davide Berardi

Source :

Clinical Oral Implants Research [ 0905-7161 ] ; 2011-05.

RBID : ISTEX:801FD0674E0EAA11A96698F468DE693612670FA0

English descriptors

Abstract

Objectives: Protocols of immediate loading have been reported in several studies. It has also been demonstrated that the cause of failure of immediate loaded implants is due to the micromotion on the bone–implant interface induced by immediate loading. There should be a minimum gap between the implant and the peri‐implant bone, without micromotions occurring above a definite threshold risk as they induce bone resorption and fibrosis around the implant. Measurement of the torque necessary to insert an implant in the bone is a parameter for measuring initial stability. The higher the implant insertion torque, the higher the initial stability attained. The aim of this study was to evaluate in vitro the correlation between the micromotion of cylindric screw implants ad modum Branemark and the insertion torque in bone of different densities.

Url:

https://api.istex.fr/document/801FD0674E0EAA11A96698F468DE693612670FA0/fulltext/pdf

DOI: 10.1111/j.1600-0501.2010.02036.x

Links to Exploration step

ISTEX:801FD0674E0EAA11A96698F468DE693612670FA0

Le document en format XML

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<title level="a" type="short">Correlation between insertion torque and implant micromotion</title>
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<profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head>
<p><hi rend="bold">Objectives: </hi>
 Protocols of immediate loading have been reported in several studies. It has also been demonstrated that the cause of failure of immediate loaded implants is due to the micromotion on the bone–implant interface induced by immediate loading. There should be a minimum gap between the implant and the peri‐implant bone, without micromotions occurring above a definite threshold risk as they induce bone resorption and fibrosis around the implant. Measurement of the torque necessary to insert an implant in the bone is a parameter for measuring initial stability. The higher the implant insertion torque, the higher the initial stability attained. The aim of this study was to evaluate <hi rend="italic">in vitro</hi>
 the correlation between the micromotion of cylindric screw implants <hi rend="italic">ad modum</hi>
 Branemark and the insertion torque in bone of different densities.</p>
<p><hi rend="bold">Material and methods: </hi>
 The test was carried out on 2 × 2 cm samples of fresh bovine bone of three different densities: hard (H), medium (M) and soft (S). One hundred and fifty hexa implants <hi rend="italic">ad modum</hi>
 Branemark were used, 3.75 mm in diameter and 9 mm long. To screw in the implants, a customized manual key was used, controlled digitally to evaluate the peak insertion torques. Ten implants were prepared for each torque (20, 35, 45, 70 and 100 N/cm).</p>
<p>The bone sample was then fixed on a loading device, which allowed evaluating the micromotion. On each sample, we applied a 25 N horizontal force.</p>
<p><hi rend="bold">Results: </hi>
 The results indicate that the peak insertion torque and the implant micromotion are statistically correlated, and statistically significant differences in H and M bone were found compared with S bone. In S bone, we noted a micromotion significantly higher than the risk threshold, and it was not possible to reach peak insertion torque above 35 N/cm. In H and M bone, the micromotion is below the threshold of all insertion torques.</p>
<p><hi rend="bold">Conclusions: </hi>
 Increasing the peak insertion torque, we can reduce the extent of the micromotion between the implant and the bone when submitted to lateral forces <hi rend="italic">in vitro</hi>
. In soft bone, the micromotion was always high; hence, immediate loading of implants in low‐density bone should be evaluated with care.</p>
<p> 
               <hi rend="bold">To cite this article:</hi>
           Trisi P, De Benedittis S, Perfetti G, Berardi D. Primary stability, insertion torque and bone density of cylindric implant <hi rend="italic">ad modum</hi>
 Branemark: is there a relationship? An <hi rend="italic">in vitro</hi>
 study. <hi rend="italic">Clin. Oral Impl. Res</hi>
. <hi rend="bold">22</hi>
, 2011; 567–570 doi: 10.1111/j.1600‐0501.2010.02036.x</p>
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<correspondenceTo><b>Corresponding author:</b>
 
<i>Dr Berardi Davide</i>
 Stomatology and Oral Sciences Via dei Vestini 31 Chieti 66013 Italy Tel.: +3908 713 554 153 Fax: +3908 713 554 153 e‐mail: <email normalForm="berardi.oci@virgilio.it">berardi.oci@virgilio.it</email>
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<titleGroup><title type="main">Primary stability, insertion torque and bone density of cylindric implant <i>ad modum</i>
 Branemark: Is there a relationship? An <i>in vitro</i>
 study</title>
<title type="shortAuthors">Trisi et al.</title>
<title type="short">Correlation between insertion torque and implant micromotion</title>
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<creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Paolo</givenNames>
<familyName>Trisi</familyName>
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<creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>Simona</givenNames>
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<creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>Giorgio</givenNames>
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<keywordGroup xml:lang="en"><keyword xml:id="k1">bone density</keyword>
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<abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title>
<p><b>Objectives: </b>
 Protocols of immediate loading have been reported in several studies. It has also been demonstrated that the cause of failure of immediate loaded implants is due to the micromotion on the bone–implant interface induced by immediate loading. There should be a minimum gap between the implant and the peri‐implant bone, without micromotions occurring above a definite threshold risk as they induce bone resorption and fibrosis around the implant. Measurement of the torque necessary to insert an implant in the bone is a parameter for measuring initial stability. The higher the implant insertion torque, the higher the initial stability attained. The aim of this study was to evaluate <i>in vitro</i>
 the correlation between the micromotion of cylindric screw implants <i>ad modum</i>
 Branemark and the insertion torque in bone of different densities.</p>
<p><b>Material and methods: </b>
 The test was carried out on 2 × 2 cm samples of fresh bovine bone of three different densities: hard (H), medium (M) and soft (S). One hundred and fifty hexa implants <i>ad modum</i>
 Branemark were used, 3.75 mm in diameter and 9 mm long. To screw in the implants, a customized manual key was used, controlled digitally to evaluate the peak insertion torques. Ten implants were prepared for each torque (20, 35, 45, 70 and 100 N/cm).</p>
<p>The bone sample was then fixed on a loading device, which allowed evaluating the micromotion. On each sample, we applied a 25 N horizontal force.</p>
<p><b>Results: </b>
 The results indicate that the peak insertion torque and the implant micromotion are statistically correlated, and statistically significant differences in H and M bone were found compared with S bone. In S bone, we noted a micromotion significantly higher than the risk threshold, and it was not possible to reach peak insertion torque above 35 N/cm. In H and M bone, the micromotion is below the threshold of all insertion torques.</p>
<p><b>Conclusions: </b>
 Increasing the peak insertion torque, we can reduce the extent of the micromotion between the implant and the bone when submitted to lateral forces <i>in vitro</i>
. In soft bone, the micromotion was always high; hence, immediate loading of implants in low‐density bone should be evaluated with care.</p>
<p> <b>To cite this article:</b>
           Trisi P, De Benedittis S, Perfetti G, Berardi D. Primary stability, insertion torque and bone density of cylindric implant <i>ad modum</i>
 Branemark: is there a relationship? An <i>in vitro</i>
 study. <i>Clin. Oral Impl. Res</i>
. <b>22</b>
, 2011; 567–570 doi: 10.1111/j.1600‐0501.2010.02036.x</p>
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<abstract>Objectives: Protocols of immediate loading have been reported in several studies. It has also been demonstrated that the cause of failure of immediate loaded implants is due to the micromotion on the bone–implant interface induced by immediate loading. There should be a minimum gap between the implant and the peri‐implant bone, without micromotions occurring above a definite threshold risk as they induce bone resorption and fibrosis around the implant. Measurement of the torque necessary to insert an implant in the bone is a parameter for measuring initial stability. The higher the implant insertion torque, the higher the initial stability attained. The aim of this study was to evaluate in vitro the correlation between the micromotion of cylindric screw implants ad modum Branemark and the insertion torque in bone of different densities.</abstract>
<abstract>Material and methods: The test was carried out on 2 × 2 cm samples of fresh bovine bone of three different densities: hard (H), medium (M) and soft (S). One hundred and fifty hexa implants ad modum Branemark were used, 3.75 mm in diameter and 9 mm long. To screw in the implants, a customized manual key was used, controlled digitally to evaluate the peak insertion torques. Ten implants were prepared for each torque (20, 35, 45, 70 and 100 N/cm).</abstract>
<abstract>The bone sample was then fixed on a loading device, which allowed evaluating the micromotion. On each sample, we applied a 25 N horizontal force.</abstract>
<abstract>Results: The results indicate that the peak insertion torque and the implant micromotion are statistically correlated, and statistically significant differences in H and M bone were found compared with S bone. In S bone, we noted a micromotion significantly higher than the risk threshold, and it was not possible to reach peak insertion torque above 35 N/cm. In H and M bone, the micromotion is below the threshold of all insertion torques.</abstract>
<abstract>Conclusions: Increasing the peak insertion torque, we can reduce the extent of the micromotion between the implant and the bone when submitted to lateral forces in vitro. In soft bone, the micromotion was always high; hence, immediate loading of implants in low‐density bone should be evaluated with care.</abstract>
<abstract>To cite this article:  Trisi P, De Benedittis S, Perfetti G, Berardi D. Primary stability, insertion torque and bone density of cylindric implant ad modum Branemark: is there a relationship? An in vitro study. Clin. Oral Impl. Res. 22, 2011; 567–570 doi: 10.1111/j.1600‐0501.2010.02036.x</abstract>
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Primary stability, insertion torque and bone density of cylindric implant ad modum Branemark: Is there a relationship? An in vitro study

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