Bone depth and thickness of different infrazygomatic crest miniscrew insertion paths between the first and second maxillary molars for distal tooth movement: A 3-dimensional assessment

Du, Bingran; Zhu, Jiuyu; Li, Lutao; Fan, Tiancheng; Tan, Jinchuan; Li, Jianyi

doi:10.1016/j.ajodo.2020.03.036

Cited by 6 publications

(29 citation statements)

References 26 publications

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“…Consistent with previous studies [ 4 , 12 , 14 , 16 , 20 ], our results showed no difference between the sexes. Moreover, no significant difference was found between the left and right sides, which might be owing to the facial symmetry and relatively well aligned U6 and U7 in the patients included in this study.…”

Section: Discussionsupporting

confidence: 93%

“…Although few studies have investigated the bone depth in the U7M region, thicker buccal alveolar bone has been reported [ 21 , 27 ], which can probably explain our findings. Previous studies considered U6 as a common region for insertion in the IZC [ 9 , 12 , 14 , 16 ], but in recent years, growing research has focused on region U67 instead for rich bone mass [ 17 , 18 , 20 ]. However, there is a risk that the miniscrew might injure or block the root of U6 if it is inserted into the narrow radicular region of U67, especially during the molar distalization movement.…”

Section: Discussionmentioning

confidence: 99%

“…The minimum bone depth of the miniscrew is recommended to be 3.8 mm for prolonged stability [ 20 , 23 ]. Thus, we defined bone deficiency as a bone depth <3.8 mm.…”

Section: Methodsmentioning

confidence: 99%

“…In common insertion procedures in the IZC region, the insertion path is prone to involuntarily incline distally due to the restricted placement of the operating handle by the limited width of the mouth. Thus, the impact of this distal inclination of the insertion path should be included in analyses [ 20 ]. Recently, Du et al [ 20 ] used 3D reconstruction models to explore bone depths and thicknesses of different insertion paths with different gingival and distal tipping angles in the IZC.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the impact of this distal inclination of the insertion path should be included in analyses [ 20 ]. Recently, Du et al [ 20 ] used 3D reconstruction models to explore bone depths and thicknesses of different insertion paths with different gingival and distal tipping angles in the IZC. However, the insertion points of their study were only set at the midpoints between the roots of U6 and U7.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An evaluation of bone depth at different three-dimensional paths in infrazygomatic crest region for miniscrew insertion: A cone beam computed tomography study

Pan,

Wei,

Zheng

et al. 2024

Heliyon

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

“…The minimum bone depth of the miniscrew is recommended to be 3.8 mm for prolonged stability [ 20 , 23 ]. Thus, we defined bone deficiency as a bone depth <3.8 mm.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An evaluation of bone depth at different three-dimensional paths in infrazygomatic crest region for miniscrew insertion: A cone beam computed tomography study

Pan,

Wei,

Zheng

et al. 2024

Heliyon

View full text Add to dashboard Cite

A 2-trajectories surgical guide for infrazygomatic mini-implants insertion

Yuan¹,

Liu²,

Zhao³

et al. 2022

AJO-DO Clinical Companion

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Clinical analysis of successful insertion of orthodontic mini-implants in infrazygomatic crest

Liu

Huang

et al. 2023

BMC Oral Health

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Background The insertion positions of mini-implant in infrazygomatic crest has been reported, but due to the anatomical variation, the precise location of this site is not clear yet. This study used cone-beam computed tomography (CBCT) to analyze the position and angle of mini-implants successfully inserted in the infrazygomatic crest, with the goal of providing reference data for clinical practice. Methods CBCT was used to image 40 mini-implants and their surrounding tissues in adult orthodontic patients who successfully underwent mini-implant insertion in the infrazygomatic crest. The insertion positions and angles of mini-implants were measured, and the thicknesses of buccal and palatal bone adjacent to the mini-implants were also recorded. Then, we proposed the position and implantation angle for infrazygomatic crest insertion. According to the position and angle, the cortical bone thickness and distance to the root of another 54 randomly selected infrazygomatic crests were recorded to verify its feasibility. Results In the coordinate system, the implantation position of the 40 successful mini-implants was (-0.4 ± 2, 8.2 ± 2.5) and the implantation angle between the long axis of the mini-implant and horizontal reference plane was 56.4° ± 7.7°. The bone thicknesses on buccal and palatal sides of infrazygomatic crest adjacent to mini-implants were 4.1 ± 2.5 mm and 7.2 ± 3.2 mm, respectively, and the cortical bone thickness was 2.4 ± 0.6 mm. Among 54 infrazygomatic crests, 75.9% of them met the safety and stability requirements. When the implantation height was increased by 1, 2, and 3 mm, the proportions of implants that met requirements for success were 81.5%, 90.7%, and 94.4%, respectively. But, the proportions of eligible implants were limited at implantation angle increases of 5° and 10°. Conclusions Using the long axis of the maxillary first permanent molar (U6) as the vertical reference line, mini-implants could be safely inserted in the infrazygomatic crest at a distal distance of 0.4 mm and height of 8.2 mm from the central cementum-enamel junction of U6, with an implantation angle of 56.4°. The success rate increased when the implant height increased, but the proportion of eligible implantation was limited with the increase of implantation angle.

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Bone depth and thickness of different infrazygomatic crest miniscrew insertion paths between the first and second maxillary molars for distal tooth movement: A 3-dimensional assessment

Cited by 6 publications

References 26 publications

An evaluation of bone depth at different three-dimensional paths in infrazygomatic crest region for miniscrew insertion: A cone beam computed tomography study

An evaluation of bone depth at different three-dimensional paths in infrazygomatic crest region for miniscrew insertion: A cone beam computed tomography study

A 2-trajectories surgical guide for infrazygomatic mini-implants insertion

Clinical analysis of successful insertion of orthodontic mini-implants in infrazygomatic crest

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