Correlation between miniscrew stability and bone mineral density in orthodontic patients

Santiago, Rodrigo César; Paula, Fernanda Oliveira de; Fraga, Marcelo Reis; Assis, Neuza Maria Souza Picorelli; Vitral, Robert Willer Farinazzo

doi:10.1016/j.ajodo.2007.08.031

Cited by 50 publications

(40 citation statements)

References 25 publications

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“…, 18 - 22 The standardization of insertion height at 7 mm away from the interdental papilla made it possible to place mini-implants in the attached gingiva, and also to have a sufficient inter-radicular space 18 19 , 21 , 23 , 24 …”

Section: Discussionmentioning

confidence: 99%

Effect of vertical placement angle on the insertion torque of mini-implants in human alveolar bone

Maya

Pinzan-Vercelino

Gurgel

2016

Dental Press J. Orthod.

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Objective: The aim of the present ex-vivo study was to evaluate the effect of the vertical placement angle of mini-implants on primary stability by analyzing maximum insertion torque (MIT). Methods: Mini-implants were placed in 30 human cadavers, inserted at either a 90° or 60° angle to the buccal surface of the maxillary first molar. Out of 60 self-drilling mini-implants used, half were of the cylindrical type and half were of the conical type. Primary stability was assessed by means of measuring the MIT. Data were subjected to analysis of variance (ANOVA) and Newman-Keuls tests. A significance level of 5% was adopted. Results: The MIT was higher for both mini-implant types when they were placed at a 90° angle (17.27 and 14.40 Ncm) compared with those placed at a 60° angle (14.13 and 11.40 Ncm). Conclusions: MIT values were differed according to the vertical mini-implant placement angle in the maxillary posterior area. Regardless of the type of mini-implant used, placement at a 90° angle resulted in a higher MIT.

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Section: Discussionmentioning

confidence: 99%

Effect of vertical placement angle on the insertion torque of mini-implants in human alveolar bone

Maya

Pinzan-Vercelino

Gurgel

2016

Dental Press J. Orthod.

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“…In this approach, cortical bone thickness plays a more important role than bone quality in obtaining sufficient mechanical interaction between the miniscrew implants and bone. Many studies suggest that cortical bone thickness is the most important determinant of initial stability 23,24,25,26,27,28,29,30,31,32,33,34. For orthodontic correction, the initial stability provided by cortical bone thickness is a very important factor because the force is added just after implantation or within 1 to 3 weeks thereafter.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional evaluation of maxillary anterior alveolar bone for optimal placement of miniscrew implants

Choi¹,

Lee

et al. 2014

Korean J Orthod

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ObjectiveThis study aimed to propose clinical guidelines for placing miniscrew implants using the results obtained from 3-dimensional analysis of maxillary anterior interdental alveolar bone by cone-beam computed tomography (CBCT).MethodsBy using CBCT data from 52 adult patients (17 men and 35 women; mean age, 27.9 years), alveolar bone were measured in 3 regions: between the maxillary central incisors (U1-U1), between the maxillary central incisor and maxillary lateral incisor (U1-U2), and between the maxillary lateral incisor and the canine (U2-U3). Cortical bone thickness, labio-palatal thickness, and interdental root distance were measured at 4 mm, 6 mm, and 8 mm apical to the interdental cementoenamel junction (ICEJ).ResultsThe cortical bone thickness significantly increased from the U1-U1 region to the U2-U3 region (p < 0.05). The labio-palatal thickness was significantly less in the U1-U1 region (p < 0.05), and the interdental root distance was significantly less in the U1-U2 region (p < 0.05).ConclusionsThe results of this study suggest that the interdental root regions U2-U3 and U1-U1 are the best sites for placing miniscrew implants into maxillary anterior alveolar bone.

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“…A close relationship exists between the bone density and anchorage potential, rate of tooth movement, and success of dental implants [2-4]. Studies have shown that dental implants placed in low-density areas have a higher failure rate [3].…”

Section: Introductionmentioning

confidence: 99%

Quantitative assessment of interradicular bone density in the maxilla and mandible: implications in clinical orthodontics

Chugh¹,

Ganeshkar

Revankar

et al. 2013

Prog Orthod.

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BackgroundBone density at the interradicular area plays an important role during orthodontic treatment. In view of this fact, the study was designed to quantitatively evaluate the bone density at the interradicular areas of the alveolar and basal bones of maxilla and mandible by computed tomography.MethodsOne hundred and nine computed tomographic images were randomly selected, and bone density was measured in Hounsfield units (HU) with bone mineral density software (Siemens VA20A_SP3A). The sample consisted of 78 males (mean age 29.5 years, range 20 to 40 years) and 31 females (mean age 27.6 years, range 20 to 40 years). Cortical and cancellous bone density was measured at the interradicular areas at the alveolar and basal bone levels of the maxilla and mandible, and the data was subjected to statistical analysis for comparisons.ResultsThe highest cortical bone density was observed between the second premolar and first molar at the alveolar bone level and between the first and second molars at the basal bone level in the maxilla. Maxillary tuberosity showed the least bone density. The density of the cortical bone was greater in the mandible than in the maxilla and showed a progressive increase from the incisor to the retromolar area. The basal bone showed a higher density thanthe alveolar bone.ConclusionDifferent qualities of the bone were found in the anatomic regions studied, which confirms the importance of knowledge of site-specific bone tissue density to correlate with various clinical findings.

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Correlation between miniscrew stability and bone mineral density in orthodontic patients

Cited by 50 publications

References 25 publications

Effect of vertical placement angle on the insertion torque of mini-implants in human alveolar bone

Effect of vertical placement angle on the insertion torque of mini-implants in human alveolar bone

Three-dimensional evaluation of maxillary anterior alveolar bone for optimal placement of miniscrew implants

Quantitative assessment of interradicular bone density in the maxilla and mandible: implications in clinical orthodontics

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