Relationship between cortical bone thickness or computerized tomography‐derived bone density values and implant stability

Merheb, Joe; Assche, Nele Van; Coucke, Wim; Jacobs, Reinhilde; Naert, Ignace; Quirynen, Marc

doi:10.1111/j.1600-0501.2009.01880.x

Cited by 88 publications

(98 citation statements)

References 20 publications

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“…The ROI of total BMD has previously been related to the primary stability of prosthodontic implants, 12-14 but it was not verified for miniscrews in the present study or in the study of Cha et al 8 The ROI of trabecular BMD also plays an important role in the primary stability of prosthodontic implants, as verified by Bergkvist et al 3 and Merheb et al 15 However, in this study, with a cortical thickness of 1 mm, there was no association between the ROI of trabecular BMD and the primary stability of mini-implants.…”

Section: Discussionsupporting

confidence: 39%

Bone mineral density

Marquezan

Lau

Mattos

et al. 2011

The Angle Orthodontist

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Objective: To verify whether bone mineral density (BMD) of cortical bone, trabecular bone, and total bone influence the primary stability of orthodontic miniscrews and to verify whether there is a correlation between the measurement of BMD by cone-beam computed tomography (CBCT) and central dual-energy x-ray absorptiometry (DEXA). Materials and Methods: Twenty bovine bone sections were extracted from the pubic and iliac bones from regions with cortical thicknesses of approximately 1 mm. The BMD of the total bone block was evaluated using two methods: CBCT and DEXA. The BMD of cortical, trabecular, and total bone in the region of interest (ROI) were also evaluated by CBCT. After scanning the bone blocks, 20 self-drilling miniscrews (INPH) 1.4 mm in diameter and 6 mm long were inserted into them. The peak implant insertion torque (IT) was registered. After this, the pull-out test (PS) was performed and the maximum force registered. The Pearson correlation test was applied to verify the correlations between variables. Results: The BMD of the total bone block verified by CBCT and DEXA showed a positive and strong correlation (r 5 0.866, P 5 .000). The BMD of the ROI for cortical bone influenced the IT (r 5 0.518, P 5 .40) and the PS of miniscrews (r 5 0.713, P 5 .001, Table 2). However, the total bone BMD (verified by CBCT and DEXA) and trabecular bone BMD presented weak and not statistically significant correlations with primary stability. Conclusions: There was a positive correlation between total bone block BMD measured by DEXA and CBCT. The cortical BMD influenced the IT and PS. (Angle Orthod. 2012;82:62-66.)

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Section: Discussionsupporting

confidence: 39%

Bone mineral density

Marquezan

Lau

Mattos

et al. 2011

The Angle Orthodontist

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“…Cortical thickness has been related to primary stability of miniscrews and implants. 5,12,28,29,30 However, there is a lack of studies isolating these two factors: bone density and cortical thickness. The second hypothesis is that the difference in bone quality verified statistically may not be clinically relevant.…”

Section: Discussionmentioning

confidence: 99%

“…11 Primary stability has traditionally been assessed by the practitioner through manual verification. 12 Several other less subjecDeclaration of Interests: The authors certify that they have no commercial or associative interest that represents a conflict of interest in connection with the manuscript.…”

Section: Introductionmentioning

confidence: 99%

Is miniscrew primary stability influenced by bone density?

et al. 2011

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Primary stability is absence of mobility in the bone bed after mini-implant placement and depends on bone quality among other factors. Bone quality is a subjective term frequently considered as bone density. The aim of this preliminary study was to evaluate bone density in two bovine pelvic regions and verify the primary stability of miniscrews inserted into them. Forty bone blocks were extracted from bovine pelvic bones, 20 from iliac and 20 from pubic bone, all of them containing cortical bone about 1 mm thick. Half of the sections extracted from each bone were designated for histological evaluation of bone density (trabecular bone area -TBA) and the other half for bone mineral density (BMD) evaluation by means of central dual-energy X-ray absorptiometry (DEXA). Then, twenty self-drilling miniscrews (INP  , São Paulo, Brazil) 1.4 mm in diameter and 6 mm long were inserted into the bone blocks used for BMD evaluation. Peak implant insertion torque (IT) and pullout strength (PS) were used for primary stability evaluation. It was found that iliac and pubic bones present different bone densities, iliac bone being less dense considering BMD and TBA values (P > 0.05). However, the miniscrew primary stability was not different when varying the bone type (P < 0.05). IT and PS were not influenced by these differences in bone density when cortical thickness was about 1 mm thick.

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“…Segundo alguns estudos (Winkler et al, 2000;Merheb et al, 2010), o diâmetro do implante afeta significantemente os valores de quociente de estabilidade primária.…”

Section: Força Máxima De Arrancamento (Astm F543)unclassified

“…Portanto, todas essas controvérsias nos estudos que analisam a freqüência de ressonância de implantes pode ser explicado pelo fato da estabilidade primária, além de estar intimamente relacionada com densidade óssea, também ter como fatores influentes o design do implante e a técnica cirúrgica (Glauser et al, 2004;Turkylmaz et al, 2008;Kahraman et al, 2009, Chong et al,.2009Sul et al, 2009). Assim, a utilização de implantes cônicos, com região auto-perfurante (Chong et al, 2009), e de maior diâmetro (Merheb et al, 2010); e a técnica cirúrgica modificada, como a utilização de brocas de diâmetro inferior ao do implante (Ersanli et al, 2005;Turkylmaz et al, 2006b;, Tabassum et al, 2010; podem ser fatores que otimizam a fixação inicial. Além disso, sugere-se que, tais resultados contraditórios, podem ser explicados pelo fato de a confecção de um orifício menor para inserção do implante no osso cortical mais rígido ou num material mais denso, como realizado no presente estudo na madeira, por exemplo; poder provocar microfraturas no osso adjacente, o que compromete a qualidade da fixação (Kuhn et al, 1995) …”

Section: Frequência De Ressonânciaunclassified

Influência do desing, tratamento de superfície e densidade do substrato na estabilidade primária de implantes odontológicos. Análise por meio de torque de inserção, resistência ao arrancamento e freqüência de ressonância

Oliscovicz¹

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Relationship between cortical bone thickness or computerized tomography‐derived bone density values and implant stability

Abstract: RFA and PTV scores can be predicted based on implant and especially bone related factors.

Cited by 88 publications

References 20 publications

Bone mineral density

Bone mineral density

Is miniscrew primary stability influenced by bone density?

Influência do desing, tratamento de superfície e densidade do substrato na estabilidade primária de implantes odontológicos. Análise por meio de torque de inserção, resistência ao arrancamento e freqüência de ressonância

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