Soft-tissue and cortical-bone thickness at orthodontic implant sites

Kim, Hee Jin; Jung, Bock-Young; Park, Hyun Do; Kim, Doo Hyung; Park, Young Chel

doi:10.1016/j.ajodo.2004.12.024

Cited by 199 publications

(150 citation statements)

References 10 publications

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“…Cortical bone thickness varies from 0.5 to 2.5 mm in the vestibular alveolar process 5,12,13,21 , and from 1.0 to 1.5 mm in the palatal alveolar process. 22 Therefore, cortical thicknesses from 1 to 3 mm were selected to test the insertion torque of MI because cortical bone thickness is directly related to insertion torque, and insertion torque influences MI success rates.…”

Section: Discussionmentioning

confidence: 99%

“…1,4,8,9,10,11 Some studies have assessed cortical bone thickness and bone density because they are important for the stability of MI. 12,13,14 Using microcomputed tomography, Laursen et al 15 found that the thickness of the alveolar cortical bone was often < 1.0 mm buccally and palatally in the maxilla and buccally in the anterior mandible. However, in the posterior mandible, the alveolar cortical bone was thicker than 2.0 mm.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

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Influence of cortical thickness on the stability of mini-implants with microthreads

et al. 2015

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The objective of this study was to assess the influence of cortical thickness and bone density on the insertion torque of a mini-implant (MI) with microthreads. Mini-implants with lengths of 6 and 8 mm in the active part were inserted into synthetic bone blocks (polyurethane resin). The density of these blocks was 20 pounds per cubic foot (pcf), simulating bone marrow, and that of blocks 1, 2, and 3-mm-thick blocks was 40 pcf, simulating cortical bone. Blocks with uniform density of 40 pcf were also used to simulate bone areas of greater density. Insertion torque was quantified with a universal testing machine (EMIC). For both MIs, increasing insertion torque was associated with increasing cortical bone thickness. For the same MI length, significant differences were observed among all assessed groups. The insertion torque of the 6-mm-long MI inserted in a 3-mm-thick cortical bone was equivalent to that of the 8-mm-long MI inserted in a 1-mm-thick cortical bone. MIs inserted in bone blocks of greater density presented insertion torque values almost twice as high as those in other groups. The shorter MI, the lower the insertion torque, and the greater the cortical bone thickness, the greater the insertion torque. To minimize fracture risk, the size of MI should be selected according to the insertion site.

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Section: Discussionmentioning

confidence: 99%

Section: Declaration Of Interestsmentioning

confidence: 99%

Influence of cortical thickness on the stability of mini-implants with microthreads

et al. 2015

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“…Previous studies indicate that a certain amount of bone volume is critical for implant stability. 5,6 It has also been reported that a suitable bone thickness of the palate for miniimplants should be greater than 4 mm. 7 The success of mini-implants has been commonly reported to range between 70% and 89%.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have assessed bone quantity in the palate, but only a few have examined palatal bone densities. [5][6][7]11 Therefore, the purpose of this study was to quantitatively evaluate bone density in the palate so as to provide guidelines for mini-implant placement that are essential for implant site selection and implant success prediction.…”

Section: Introductionmentioning

confidence: 99%

Palatal Bone Density in Adult Subjects: Implications for Mini-Implant Placement

Moon

Park

Lim

et al. 2010

The Angle Orthodontist

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Objectives: To evaluate palatal bone density to allow for better selection of palatal implant anchorage sites. Materials and Methods: Computed tomographic (CT) images were obtained from 15 males and 15 females (mean age, 27 years; range, 23-35 years). Bone density was measured in Hounsfield units (HU) at 80 coordinates at regular mediolateral and anteroposterior intervals along the midpalatal suture. Results: Bone densities ranged from 805 to 1247 HU. A significant difference between male and female groups was noted, although no difference was found between left and right sides of individual palates. Palatal bone densities showed a tendency to decrease laterally and posteriorly. The midpalatal area within 3 mm of the midsagittal suture had the densest bone in the entire palate. Conclusion: Results suggest that mini-implants for orthodontic anchorage may be effectively placed in most areas with bone density equivalent to the palatal area if they are placed from 3 mm posterior to the incisive foramen and 1 to 5 mm to the paramedian side. (Angle Orthod. 2010; 80:137-144.)

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“…We based our clinical choices on the anatomic date published in the literature 2,3,9 , the anchorage values of teeth and groups of teeth as calculated from scanner generated data 6,7,8 , our theoretical analyses of full-banded and bonded mechanics 1 , the available material, and the primary papers describing the use of miniscrews in therapy 4,5,10 .…”

mentioning

confidence: 99%

Miniscrews: protocol and mechanics for treatment of Class II malocclusions

Faure¹,

Oueiss²

2011

J Dentofacial Anom Orthod

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Miniscrews are the most important recent innovation in orthodontics and have won a place, we believe, in the routine appliance design of everyday orthodontic practice. They are, we think primarily applicable in the treatment of the most prominent feature of the malocclusions orthodontists regularly confront, an antero-posterior discrepancy. Accordingly we discuss the protocol for full banded and bonded Class II mechanotherapy with miniscrew anchorage for:• Global arch or anterior sectional displacement;• Direct or indirect mechanics;• Sliding or loop mechanics. We then demonstrate clinical procedures: placement of miniscrews, static and mobile sectors, strengthening sectorial anchorage, active forces, and space management.Next we analyze the mechanics of treating complex cases with vertical as well as antero-posterior problems.Throughout the article we illustrate the text with sketches and clinical records. KEYWORDS Mini-implantsClass II therapy Protocol for use of mini-implants.

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Soft-tissue and cortical-bone thickness at orthodontic implant sites

Cited by 199 publications

References 10 publications

Influence of cortical thickness on the stability of mini-implants with microthreads

Influence of cortical thickness on the stability of mini-implants with microthreads

Palatal Bone Density in Adult Subjects: Implications for Mini-Implant Placement

Miniscrews: protocol and mechanics for treatment of Class II malocclusions

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