Anatomical limitations and factors influencing molar distalization

Hui, Victoria Lee Zhi; Xie, Yanhui; Zhang, Kaiwen; Chen, Haoran; Han, Wei; Tian, Ye; Yin, Yijia; Han, Xianglong

doi:10.2319/092921-731.1

Cited by 14 publications

(10 citation statements)

References 25 publications

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“…Thus, the utilization of aligners is strongly recommended in cases where non-growing individuals necessitate a range of 2 to 3 mm of distalization in the maxillary molars [ 48 , 49 ]. In addition, utilizing CBCT imaging [ 50 , 51 ] and intraoral scanning for diagnostic reasons [ 52 ] in conjunction with 3D printing has made possible the fabrication of surgical guides for accurate mini-implant placement [ 53 , 54 ]. Three-dimensional printing is an additive technology, i.e., a layer-by-layer manufacturing process.…”

Section: Discussionmentioning

confidence: 99%

Molar distalization in orthodontics: a bibliometric analysis

Cheng,

Feng,

Hao

et al. 2024

Clin Oral Invest

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Objectives The study endeavors to undertake a bibliometric analysis on molar distalization, with the objective of illuminating its evolutionary trajectory, current status, and prognosticating future research hotspots and trends. Material and methods A comprehensive exploration of the literature on molar distalization was carried out by conducting a search in the Web of Science (WOS) core database of the University of Hong Kong Electronic Library. The search for topic terms employed included “molar distalization,” “molar distalisation,” “move molar distally,” “molar distal movement,” and “molar backwards.” The search results were subsequently subjected to meticulous analysis using CiteSpace software. This analysis encompassed various facets such as the citation count; the geographical distribution of the countries, institutions, and journals responsible for publishing the articles; the distribution of the authors; the utilization of keywords within the articles; and the analysis of references. Results A total of 516 articles were included in the analysis. The top 5 countries in terms of the number of published papers were the United States (USA), South Korea, Turkey, Italy, and Germany, and the top 5 institutions in terms of the number of published papers were Kyung Hee University, A.T. Still University of Health Sciences, Catholic University of Korea, Seoul St. Mary’s Hospital, and Universidade de Sao Paulo. The top 5 authors in terms of the number of published papers were Park, Kook, Bayome, Janson, and Lee. There was little cooperation overall. The top 3 journals in terms of the most published related articles were all orthodontic-related journals. After molar distalization and anchorage, the most frequently used keywords were distalization, movement, and pendulum appliance. Kinzinger GSM is the most frequently cited author in references, and one of his articles also has the highest centrality score in references. Conclusions As the tides of time shift and scholars display an ever-growing dedication to unraveling the intricacies of this therapeutic modality, the realm of molar distalization has undergone notable advancements in technology. Initially, the traditional appliance suffered from aesthetic drawbacks and discomfort. However, contemporary iterations of the appliance have transcended these limitations, boasting enhanced elegance and convenience while concurrently elevating their efficacy. Nevertheless, limitations of current appliances, including their durability and propensity for recurrence post-treatment, continue to necessitate further advancement. Hence, the ongoing scientific inquiry aims to delve deeper into refining treatment modalities and fabricating cutting-edge appliances within this realm. Clinical relevance. This study holds the potential to significantly enhance the ability of orthodontists to devise treatment protocols and offer state-of-the-art clinical recommendations, thereby empowering them to deliver advanced and refined orthodontic interventions.

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Section: Discussionmentioning

confidence: 99%

Molar distalization in orthodontics: a bibliometric analysis

Cheng,

Feng,

Hao

et al. 2024

Clin Oral Invest

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“…Using CBCT, Hui et al 11 evaluated the MT width at 3, 6, and 9 mm from the cementoenamel line and found differences with the coronal zone closest to the distal root in patients with Class II malocclusion. They also They emphasized the need for future studies to evaluate the relationship of the maxillary sinus to the roots of the second molar as it may be another anatomical limitation in molar distalization.…”

Section: Discussionmentioning

confidence: 99%

Anatomical factors of the maxillary tuberosity that influence molar distalization

López,

Olmos,

Morales

2024

Korean J Orthod

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Objective To examine the areas of the maxillary tuberosity (MT) (coronal, apical, width, and height) with respect to the presence or absence of the third molar to establish possible anatomical limitations for molar distalization. Methods A total of 277 tuberosities were evaluated through sagittal computed tomography (CT) images, divided for measurement into coronal (free of bone), apical (area of influence of the maxillary sinus), and tuberosity (bony area) zones, and stratified by the presence or absence of the third molar, sex, and two age subgroups. Mann–Whitney U test was used to compare the groups considering the third molar. Results The medians of the width and height of the tuberosity decreased significantly in the absence of the third molar ( P < 0.001). The apical area also showed differences, with negative values in the absence of the third molar and positive values in the presence of the third molar ( P < 0.001). However, no differences were observed for the coronal area ( P > 0.05). Conclusions In the absence of the third molar, the size of the MT, represented by its width and height, was smaller and negative values (decrease) were observed for the maxillary sinus. The sagittal CT provides useful information regarding the amount of bone tissue available for distalization and relationship of the second molar with respect to the maxillary sinus, which allows individualizing each case in relation to the amount and type of movement expected.

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“…Ghougassian found an increase of 5 mm of retro-molar space corresponded to a 1.8 stage in tooth maturation with the Nolla stage 22 . For adult patients without growth potential, the limit for available distance is closer to the apical level 23 . Patients with Class III malocclusion have greater retro-molar space than Class II and Class I patients along the posterior line of occlusion 24,25 .…”

Section: Discussionmentioning

confidence: 99%

The effects of clear aligner to move mandibular first molar distally using finite element method.

Kang

Zhang

et al. 2023

Preprint

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Objectives To analyze the features of tooth movement with clear aligner(CA) under different starting point and attachment settings.Materials and methods A 3D finite element(FE) model was established including mandible, dentition, periodontal ligaments(PDLs), CA and horizontal rectangular attachment. The second molar was previously positioned 3.2mm distally. Three groups were created according to attachment setting: (1)no attachment, (2)attachment on the second molar, (3) attachment on the first molar. In each group, the starting point of the first molar was 0mm(SET1), 1mm(SET2), 2mm(SET3) and 3mm(SET4) to the premolar in turn. A distal moving distance of 0.2 mm was applied to the first molar.Results As the first molar got closer to the second molar, distal displacement of the first molar, mesial displacement of premolar and labial displacement of anterior teeth increased, while the mesial displacement of the second molar decreased. When the attachment was applied on the buccal surface of the first molar, the average displacement value reached the top for the first molar(6.79e− 2mm), premolar(2.72e− 2mm) and anterior teeth(2.59e− 2mm) in SET 4. The average displacement of the second molar reached the top(3.07e− 2mm) in SET1 when attachment was placed on the second molar.Conclusions The distal displacement of the first molar resulted in an opposite movement of other teeth in dentition without additional anchorage. The effect of mesial and labial movement increased except for the second molar when the first molar moved distally. The horizontal rectangular attachment placed on the first molar produced more distal movement of the first molar crown.

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Anatomical limitations and factors influencing molar distalization

Cited by 14 publications

References 25 publications

Molar distalization in orthodontics: a bibliometric analysis

Molar distalization in orthodontics: a bibliometric analysis

Anatomical factors of the maxillary tuberosity that influence molar distalization

The effects of clear aligner to move mandibular first molar distally using finite element method.

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