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

Moon, Sohee; Park, Sun-Hyung; Lim, Won Hee; Chun, Yang Sook

doi:10.2319/011909-40.1

Cited by 68 publications

(57 citation statements)

References 10 publications

(20 reference statements)

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“…This interesting finding is consistent with the results of other studies on the bone densities at midpalatal mini-implant placement sites 24-26. On the other hand, Choi et al,27 who investigated the bone densities at interdental areas with simulated placement of mini-implants, found no difference between the genders.…”

Section: Discussionsupporting

confidence: 91%

Quantitative evaluation of alveolar cortical bone density in adults with different vertical facial types using cone-beam computed tomography

2014

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ObjectiveThe purpose of this study was to quantitatively evaluate the cortical bone densities of the maxillary and mandibular alveolar processes in adults with different vertical facial types using cone-beam computed tomography (CBCT) images.MethodsCBCT images (n = 142) of adult patients (20-45 years) were classified into hypodivergent, normodivergent, and hyperdivergent groups on the basis of linear and angular S-N/Go-Me measurements. The cortical bone densities (in Hounsfield units) at maxillary and mandibular interdental sites from the distal aspect of the canine to the mesial aspect of the second molar were measured on the images.ResultsOn the maxillary buccal side, female subjects in the hyperdivergent group showed significantly decreased bone density, while in the posterior region, male subjects in the hyperdivergent group displayed significantly decreased bone density when compared with corresponding subjects in the other groups (p<0.001). Furthermore, the subjects in the hyperdivergent group had significantly lower bone densities on the mandibular buccal side than hypodivergent subjects. The maxillary palatal bone density did not differ significantly among groups, but female subjects showed significantly denser palatal cortical bone. No significant difference in bone density was found between the palatal and buccal sides in the maxillary premolar region. Overall, the palatal cortical bone was denser anteriorly and buccal cortical bone was denser posteriorly.ConclusionAdults with the hyperdivergent facial type tend to have less-dense buccal cortical bone in the maxillary and mandibular alveolar processes. Clinicians should be aware of the variability of cortical bone densities at mini-implant placement sites.

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Section: Discussionsupporting

confidence: 91%

Quantitative evaluation of alveolar cortical bone density in adults with different vertical facial types using cone-beam computed tomography

2014

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“…The palate is probably the most favorable area for miniscrew placement because there is easy access, low risk of damaging important anatomical structures and there is attached keratinized tissue along its entire length. [2][3][4][5][6] Moreover, mini-implants placed in these regions have the advantage of not interfering in the tooth movement. 7 This area is chosen for placing mini-implants when forward or backward movements of posterior teeth are required, 8 intrusion of maxillary teeth 9,10 or traction of impacted maxillary teeth.…”

mentioning

confidence: 99%

Tomographic mapping of the hard palate and overlying mucosa

et al. 2012

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The aim of this study was to measure the thickness of the hard palate and its overlying mucosa using cone-beam computed tomography (CBCT), for purposes of miniscrew placement. The sample comprised 36 CBCT scans of patients aged 12 to 52 years from a database of the Orthodontics Department of the Federal University of Rio de Janeiro. Paracoronal views of the palatal region were reconstructed at 4, 8, 16 and 24 mm posterior to the incisive foramen. In each reconstruction measurements were taken at the suture, 3 mm and 6 mm bilaterally to it. Wilcoxon's test verified the differences between the selected regions. Total bone height decreased from the anterior to the posterior region. In cross sections 4, 16 and 24, bone height decreased from the suture laterally to the 3 mm region and then increased in the 6 mm region. The cortical thickness does not seem to be a concern because it presented a mean thickness of at least 1 mm at all sites evaluated. The measurements of the mucosa thickness decreased from lateral to median and from anterior to posterior regions. The most suitable areas for miniscrew placement in the palate are located 4 mm posterior to the incisive foramen, in the median or paramedian regions 3 mm adjacent to the suture.

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“…The AP has advantages for implantation Figure 9 Double-Y plate application following RME: (a) lateral cephalometric findings; (b) cephalometric superimposition (anterior cranial base) of initial (solid line) and post-treatment (dotted line); (c) intra-oral photographs show treatment progress in occlusal view, initial and post-treatment findings and was reported to have great depth (Kang et al, 2007;Baumgaetel, 2009) and high density (Moon et al, 2010). Success of the anchorage devices is a key to the overall success of orthodontic treatment, because anchorage failure fundamentally upsets treatment planning.…”

Section: Discussionmentioning

confidence: 97%

Orthodontic skeletal anchorage using a palatal external plate

Kobayashi

Fushima

2014

Journal of Orthodontics

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We have developed the Anchor-Lock external plate system, which is fitted on the palate for the purpose of orthodontic skeletal anchorage. The aim of this study was to introduce the Anchor-Lock and assess its success rate. The Anchor-Lock is composed of titanium screws of 2·0-mm diameter and a titanium plate of 1·0-mm thickness. The external plate is rigidly interlocked with the heads of the screws, which are implanted trans-mucosally into palatal bone. Three types of Anchor-Lock are available. These were applied to 137 orthodontic patients (104 females and 33 males) aged 10-54 years. Two types of plate were used, a straight-shaped plate applied to the hard palate and to the anterior palate and a double-Y-shaped plate applied after tooth-borne rapid maxillary expansion. Success rate of the Anchor-Lock was 92·0% overall. No significant difference in success rate was found by age or sex of patients. Type or screw length of the Anchor-Lock did not affect success rate significantly. Success rate was significantly increased by the use of the surgical stent. The Anchor-Lock was effectively applied to distalize and/or intrude the upper molars. The Anchor-Lock system appears suitable for clinical use as an alternative to conventional screw- and plate-type orthodontic implants.

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

Cited by 68 publications

References 10 publications

Quantitative evaluation of alveolar cortical bone density in adults with different vertical facial types using cone-beam computed tomography

Quantitative evaluation of alveolar cortical bone density in adults with different vertical facial types using cone-beam computed tomography

Tomographic mapping of the hard palate and overlying mucosa

Orthodontic skeletal anchorage using a palatal external plate

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