Mandibular buccal shelf and infrazygomatic crest thicknesses in patients with different vertical facial heights

Vargas, Eduardo Otero Amaral; Lima, Rodrigo Lopes de; Nojima, Lincoln Issamu

doi:10.1016/j.ajodo.2019.08.016

Cited by 24 publications

(40 citation statements)

References 29 publications

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“…In addition, another recent study, 27 evaluating a sample of Brazilian patients, found a statistically significant and inversely proportional correlation, both transversely and vertically, between bone thickness in the MBS and gonial angle. A reduced gonial angle is usually associated with short-faced patients; thus, it can be inferred that individuals with short vertical facial height present with greater bone thickness than do those with a long face; this finding was consistent with that of previous studies.…”

Section: Discussionmentioning

confidence: 89%

“…11,12,28 Consequently, short-faced patients may be suitable candidates for the installation of miniscrews in the MBS due to the bone thickness permitting greater surgical perforations and the insertion of larger and longer miniscrews, which affect the primary stability of these devices. 27 Overall, this evidence suggests that facial type may not be as good a predictor of adequate bone availability for extra alveolar miniscrew placement as it is generally assumed. As such, only CBCT imaging with adequate parameters can show bone availability and ideal location.…”

Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

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Miniscrew insertion sites of infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: A cone-beam computed tomography study

et al. 2021

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Objective To identify optimal areas for the insertion of extra-alveolar miniscrews into the infrazygomatic crest (IZC) and mandibular buccal shelf (MBS), using cone beam computed tomography (CBCT) imaging in patients with different craniofacial patterns. Methods CBCT reconstructions of untreated individuals were used to evaluate the IZC and MBS areas. The participants were divided into three groups, based on the craniofacial pattern, namely, brachyfacial (n = 15; mean age, 23.3 years), mesofacial (n = 15; mean age, 19.24 years), and dolichofacial (n = 15; mean age, 17.79 years). In the IZC, the evaluated areas were at 11, 13, and 15 mm above the buccal cusp tips of the right and left first molars. In the MBS, the evaluated areas were at the projections of the first molars’ distal roots and second molars’ mesial and distal roots, at a 4- and 8-mm distance from the cementoenamel junction. Intergroup comparisons were performed with analysis of variance and the Tukey test. Results There was no statistically significant difference in the IZC bone thickness among the groups. For MBS bone availability, some comparisons revealed no difference; meanwhile, other comparisons revealed increased MBS bone thickness in the brachyfacial (first molars distal roots) and dolichofacial (second molars mesial and distal roots) patterns. Conclusions There was no significant difference in the IZC bone thickness among the groups. The facial skeletal pattern may affect the availability of ideal bone thickness for the insertion of extra-alveolar miniscrews in the MBS region; however, this variability is unlikely to be clinically meaningful.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 90%

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Miniscrew insertion sites of infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: A cone-beam computed tomography study

et al. 2021

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“…Hence, assessing the skeletal age of the patient is necessary to determine the bone volume and density before placing the miniscrews for orthodontic purpose. Even though Vargas et al 39 have stated that there is no correlation between the facial pattern and infrazygomatic crest (IZC) bone thickness, Murugesan et al 40 have stated that bone thickness decreased in high angle cases compared to low angle cases. Thus, further longitudinal studies are required to investigate the infrazygomatic bone thickness in various skeletal patterns.…”

Section: Discussionmentioning

confidence: 99%

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

Krishnakumaran

Krishnan

Raman

et al. 2021

J Indian Orthod Soc

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Anchorage is one of the most important consideration in the field of orthodontics to achieve a desired tooth movement. In order to eliminate the undesirable side effects such as anchorage loss, skeletal anchorage systems such as mini-implants have been introduced in orthodontics. Aim: To evaluate the bone thickness of the infrazygomatic crest in different cervical vertebrae maturation index (CVMI) and to compare it between male and female subjects, by using cone beam computerized tomography (CBCT) imaging. Materials and Methods: A retrospective study was conducted using CBCT images of 60 patients in the age group of 8–25 years. Cervical vertebra maturation was analyzed using Hassel–Farmann index and divided into 6 groups (n = 10/group). The infrazygomatic crest was divided into horizontal and vertical planes. The horizontal plane passed through the most inferior border of the zygomatic process of maxilla and the vertical plane passed through the most anterior point of the infratemporal fossa parallel to midsagittal plane. Five parallel lines were drawn at 2 mm interval in both horizontal and vertical planes (HB+2, HB+4, HB+6, HB+8, and HB+10) (V-2, V-4, V-6, V-8, and V-10). The bone thickness was measured at the point of intersection of these lines. Results: According to Kruskal–Wallis analysis, statistically significant difference in infrazygomatic crest (IZC) bone thickness was seen in various CVMI stages ( P = .001). Maximum bone thickness was 11 mm and minimum bone thickness was 1 mm. No significant difference was observed between male and female populations. Conclusion: Thus, the superolateral area in infrazygomatic crest is the most appropriate site for miniscrew insertion in all age groups.

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“…The stability of these devices is directly linked to bone density, bone thickness and height (BTH), insertion site, and proximity to roots, nerves, and vessels. [4][5][6][7] An optimal place for installing mandibular miniscrews is the buccal shelf area (BS) because of the quantity and quality of bone available, [8][9][10][11][12] the high rate of stability of the devices, and the distance from the dental roots. 3 However, the best insertion site in the BS and how vertical facial pattern, age, and sex influence site suitability remain unclear given anatomic variability.…”

Section: Introductionmentioning

confidence: 99%

Bone thickness and height of the buccal shelf area and the mandibular canal position for miniscrew insertion in patients with different vertical facial patterns, age, and sex

Eto¹,

Figueiredo²,

Eto³

et al. 2023

The Angle Orthodontist

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Objectives The objectives of this article were the following: (1) to analyze bone thickness and height (BTH) of the buccal shelf area (BS) quantitatively in four different potentially eligible sites for miniscrew insertion; (2) to compare and contrast BTH and the changes in spatial position of the inferior alveolar nerve canal (IANC); and (3) to assess differences with age among vertical facial patterns (hypodivergent, normodivergent, and hyperdivergent) and well as by sex. Materials and Methods Cone-beam computed tomography scans of 205 individuals (110 women and 95 men) were divided into groups according to age, vertical facial pattern, and sex. The BTH of the BS and the BTH to the IANC were measured in the mesial and distal roots of the first and second molars. Results BTH progressively increased in a posterior direction (P < .001), while BTH to the IANC increased and decreased (P < .001) for thickness and height, respectively, in the same direction in all age groups, for the three different vertical facial patterns, and in both sexes. Women showed significantly less BTH to the IANC (P < .002). Hypodivergent patients had greater BTH (P < .024) and a smaller bone height to the IANC (P < .018) only in the first molar region. Patients over 40 years of age had lower bone height in the second molar area (P < .003). Conclusions The ideal place for BS miniscrew insertion is the region of the distal root of the second molars, regardless of facial pattern, sex, and age. The BS in women has less BTH and less BTH to the IANC.

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Mandibular buccal shelf and infrazygomatic crest thicknesses in patients with different vertical facial heights

Cited by 24 publications

References 29 publications

Miniscrew insertion sites of infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: A cone-beam computed tomography study

Miniscrew insertion sites of infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: A cone-beam computed tomography study

Correlation of Infrazygomatic Bone Thickness With Cervical Vertebrae Maturation Stages

Bone thickness and height of the buccal shelf area and the mandibular canal position for miniscrew insertion in patients with different vertical facial patterns, age, and sex

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