Effects of bicortical anchorage on pterygopalatine suture opening with microimplant-assisted maxillary skeletal expansion

Lee, Dong-Wook; Park, Jae Hyun; Moon, Won; Seo, Hye Young; Chae, Jong‐Moon

doi:10.1016/j.ajodo.2020.02.013

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…Before using MARPE, the palatal bone depth was measured on the T0 CBCT images after orientation ( Figure 2 ) for distinguishing the bony cortices of the palate and nasal floor. 21 The microimplant length was selected based on the measured depth. The MARPE (MSE-12, type I; 0.8 mm expansion in 4 turns [1 revolution]; Biomaterials, Seoul, Korea) device made passive contact with the underlying tissue and was soldered to four bands in the U46 group and two bands in the U6 group.…”

Section: Methodsmentioning

confidence: 99%

Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion

Choi

Lee

et al. 2023

Korean J Orthod

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Objective To evaluate the following null hypothesis the skeletal and dentoalveolar expansion patterns in the coronal and axial planes are not different with two different types of microimplant-assisted rapid palatal expansion (MARPE) systems. Methods Pretreatment (T0) and post-MARPE (T1) cone-beam computed tomography (CBCT) images of 32 patients (14 males and 18 females; mean age, 19.37) were analyzed. We compared two different MARPE systems. One MARPE system included the maxillary first premolars, maxillary first molars, and four microimplants as anchors (U46 type, n = 16), while the other included only the maxillary first molars and microimplants as anchors (U6 type, n = 16). Results In the molar region of the U6 and U46 groups, the transverse expansion at the midnasal, basal, alveolar, and dental levels was 2.64, 3.52, 4.46, and 6.32 mm and 2.17, 2.56, 2.73, and 5.71 mm, respectively. A significant difference was observed in the posterior alveolar-level expansion ( p = 0.036) and posterior basal-bone-level expansion ( p = 0.043) between the groups, with greater posterior skeletal and alveolar expansion in the U6 group. Conclusions Compared with the U46 group, the U6 group showed greater posterior expansion at the alveolar and basal-bone levels, with an almost parallel split. Both groups showed a pyramidal expansion pattern in the coronal view.

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Section: Methodsmentioning

confidence: 99%

Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion

Choi

Lee

et al. 2023

Korean J Orthod

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“…The 3D coordinates (x,y,z) were constructed using nasion (N) as the reference point (0,0,0). They were assigned according to the N point and the FH plane, which was defined as a plane passing through the bilateral orbitale (Or) points and the midpoint of the bilateral porion (Po) points (Figure 2) [21,22]. Three-dimensional landmarks were traced, and each landmark was assigned its 3D coordinates.…”

Section: Standardized Reorientation Of Cbct Images 3d-coordinate Syst...mentioning

confidence: 99%

“…The three-dimensional analysis of cone-beam computed tomography (CBCT) images have allowed 3D changes of NSD or nasofacial structures to be analyzed after maxillary skeletal expansion (MSE) using direct measurements of angles and lengths on the sectional images, and 3D superimpositions [11,[16][17][18][19][20][21][22], while some studies have evaluated the 3D changes using a Cartesian coordinate system [18,23,24]. However, there was no study to evaluate the NSD using a 3D coordinate system.…”

Section: Introductionmentioning

confidence: 99%

A CBCT Evaluation of Nasal Septal Deviation and Related Nasofacial Structures after Maxillary Skeletal Expansion

et al. 2022

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Background: The aim of this study was to evaluate three-dimensional (3D) changes in nasal septal deviation (NSD) and related nasofacial structures after maxillary skeletal expansion (MSE). Methods: This retrospective study evaluated 28 patients aged 12.0–48.4 years (mean age, 20.4 ± 7.3 years; 12 males, 16 females) diagnosed with transverse maxillary deficiency and treated with MSE. Cone-beam computed tomography (CBCT) images were taken at pre-expansion (T1), post-expansion (T2), and 6-months after MSE (T3) and were reoriented. Three-dimensional coordinates (x,y,z) were constructed using nasion (N) as the reference point (0,0,0). A paired-sample t-test and an independent sample t-test were performed to investigate and compare the 3D changes of the NSD and nasofacial structures after MSE, depending on the direction and amount of NSD and the amount of midpalatal expansion (MPE). Results: NSD was alleviated at T3–T1 in the coronal plane; nasal septal length increased significantly. The absolute nasal floor (NF) angle (2.06° at T1) decreased at T2–T1 (p > 0.05) and increased at T3–T2 (p < 0.05). The midface moved forward and downward, and pogonion (Pog) and menton (Me) moved downward and backward. There were no significant differences between the higher and lower NSD groups and greater and lesser MPE groups. Conclusions: Consequently, NSD was alleviated with variable positive nasofacial changes after MSE in both the short and long term. Therefore, MSE can be used to improve or camouflage facial deformities.

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“…(2) MSE as the initial step in therapy, (3) successful midpalatal suture opening, and (4) available cone-beam computed tomography (CBCT) images taken before (T0) and at least 6 months after expansion (T1). The exclusion criteria were as follows: (1) past trauma to the craniofacial region, (2) craniofacial syndrome patients, (3) a history of orthognathic surgery or (4) orthodontic and dentofacial orthopedic therapy in the past, (5) simultaneous facemask treatments and (6) the intermolar widths of the mandible and the maxilla vary by more than 6 mm [18].…”

Section: Materials and Treatment Protocolmentioning

confidence: 99%

“…A maxillary skeletal expander (MSE) is one of the hybrid-type MARPE devices with four mini-implants positioned more posteriorly to maximize the possibility of bicortical engagement into the palatal bone and nasal floor [18]. MARPE increases the possibility of non-extraction treatment by creating extra space [19].…”

Section: Introductionmentioning

confidence: 99%

Effects of Mini-Implant-Assisted Rapid Palatal Expansion on Incisive Canal Morphology and Tooth–Canal Relationship

et al. 2022

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The objective of this study was to identify the change in incisive canal (IC) morphology and tooth–canal relationship after mini-implant-assisted rapid palatal expansion (MARPE). Pretreatment and posttreatment cone-beam computed tomography images of 30 subjects were retrospectively evaluated. The dimensional and volume changes of the IC after MARPE treatment were evaluated, and the tooth–canal relationship and positional relationship between the maxillary central incisors were additionally compared in the group where the root apex of the maxillary central incisors was higher than the IC oral opening. The mediolateral and labiopalatal widths of the IC were significantly increased in all three levels after MARPE treatment (p < 0.01). The amount of increase was greater in the mediolateral direction than in the labiopalatal direction. The anteroposterior distance from the mesial point of the maxillary central incisors to the anterior margin of the IC was significantly decreased only in the oral opening level in the samples where the apices of the maxillary central incisors were located more superior to the oral opening of the IC (p < 0.05). The mediolateral distance between the mesial points of the maxillary central incisors and the distance between the root apex of the maxillary central incisors significantly increased after MARPE (p < 0.001). However, the distance between the crown tips of the maxillary central incisors did not significantly increase, even after MARPE treatment (p > 0.05). The volume of the IC significantly increased after MARPE treatment (p < 0.001), and the average increase in the total volume of the IC was about 65%. MARPE increased the width and volume of the IC and did not result in a clinically significant change in the root–canal relationship.

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Effects of bicortical anchorage on pterygopalatine suture opening with microimplant-assisted maxillary skeletal expansion

Cited by 14 publications

References 20 publications

Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion

Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion

A CBCT Evaluation of Nasal Septal Deviation and Related Nasofacial Structures after Maxillary Skeletal Expansion

Effects of Mini-Implant-Assisted Rapid Palatal Expansion on Incisive Canal Morphology and Tooth–Canal Relationship

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