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BMC Oral Health
Published in: BMC Oral Health 1/2020

Open Access 01-12-2020 | Tooth Extraction | Research article

Influence of orthodontic treatment with premolar extraction on the spatial position of maxillary third molars in adult patients: a retrospective cohort cone-bean computed tomography study

Authors: Fangwei Pan, Zhentao Yang, Jian Wang, Ruilie Cai, Jialing Liu, Chenghao Zhang, Wen Liao

Published in: BMC Oral Health | Issue 1/2020

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Abstract

Background

Based on low-dose radiation Cone-bean computed tomography (CBCT) images, This study aims to establish a space coordinate system, which offers more precise and comparable evaluation on changes of maxillary third molars influenced by orthodontic treatment with premolar extraction in adults. The system suggests promising application prospect in future studies related to CBCT superimposition and evaluation for its feasibility and efficiency.

Methods

Forty-nine maxillary third molars from 27 patients (mean age, 20.78 years) were included. CBCT images were obtained before and after orthodontic treatment with premolars extracted (mean treatment duration, 31.47 months). The changes in the position, angulation, and rotation of the third molars were evaluated with a space coordinate system using four landmarks: anterior nasal spine (ANS), posterior nasal spine (PNS), left and right orbitales.

Results

After orthodontic treatment, the third molars moved forward (adjusted mean, 1.44 mm) (p < 0.001) and downward (adjusted mean, 2.87 mm) (p < 0.001) accompanied by outward rotation of the crowns (adjusted mean, 5.38°) (p = 0.001), while changes in angulation were insignificant.

Conclusions

This was the first study to systematically investigate the spatial position change of maxillary third molars in adult patients who received orthodontic treatment with premolar extraction. During the process, maxillary third molars moved downward and forward accompanied by outward rotation of the crowns. Orthodontists should take tooth movement potential into consideration when making extraction plans.
Literature
1.
Jackson TH, Guez C, Lin FC, Proffit WR, Ko CC. Extraction frequencies at a university orthodontic clinic in the 21st century: demographic and diagnostic factors affecting the likelihood of extraction. Am J Orthod Dentofacial Orthop. 2017;151(3):456–62. CrossRef
2.
Lavelle CL. A study of multiracial malocclusions. Community Dent Oral Epidemiol. 1976;4(1):38–41. CrossRef
3.
Badawi Fayad J, Levy JC, Yazbeck C, Cavezian R, Cabanis EA. Eruption of third molars: relationship to inclination of adjacent molars. Am J Orthod Dentofacial Orthop. 2004;125(2):200–2. CrossRef
4.
Smailiene D, Trakiniene G, Beinoriene A, Tutliene U. Relationship between the position of impacted third molars and external root resorption of adjacent second molars: a retrospective CBCT study. Medicina (Kaunas). 2019;55(6):24.
5.
Genest-Beucher S, Graillon N, Bruneau S, Benzaquen M, Guyot L. Does mandibular third molar have an impact on dental mandibular anterior crowding? A literature review. J Stomatol Oral Maxillofac Surg. 2018;119(3):204–7. CrossRef
6.
Bastos Ado C, de Oliveira JB, Mello KF, Leao PB, Artese F, Normando D. The ability of orthodontists and oral/maxillofacial surgeons to predict eruption of lower third molar. Prog Orthod. 2016;17(1):21. CrossRef
7.
Friedman JW. The prophylactic extraction of third molars: a public health hazard. Am J Public Health. 2007;97(9):1554–9. CrossRef
8.
Livas C, Delli K. Does orthodontic extraction treatment improve the angular position of third molars? A systematic review. J Oral Maxillofac Surg. 2017;75(3):475–83. CrossRef
9.
Bauss O, Kiliaridis S. Evaluation of tooth position, occlusion, and interproximal contacts after transplantation of immature third molars. Eur J Orthod. 2009;31(2):121–8. CrossRef
10.
Durgesh BH, Gowda KH, AlShahrani OA, Almalki AD, Almalki WD, Balharith MM, et al. Influence of premolar extraction or non-extraction orthodontic therapy on the angular changes of mandibular third molars. Saudi J Biol Sci. 2016;23(6):736–40. CrossRef
11.
Brezulier D, Fau V, Sorel O. Influence of orthodontic premolar extraction therapy on the eruption of the third molars: a systematic review of the literature. J Am Dent Assoc. 2017;148(12):903–12. CrossRef
12.
Heinz J, Stewart K, Ghoneima A. Evaluation of two-dimensional lateral cephalogram and three-dimensional cone beam computed tomography superimpositions: a comparative study. Int J Oral Maxillofac Surg. 2019;48(4):519–25. CrossRef
13.
Shahen S, Lagravere MO, Carrino G, Fahim F, Abdelsalam R, Flores-Mir C, et al. United reference method for three-dimensional treatment evaluation. Prog Orthod. 2018;19(1):47. CrossRef
14.
Lee YJ, Kook YA, Park JH, Park J, Bayome M, Vaid NR, et al. Short-term cone-beam computed tomography evaluation of maxillary third molar changes after total arch distalization in adolescents. Am J Orthod Dentofacial Orthop. 2019;155(2):191–7. CrossRef
15.
Ghoneima A, Cho H, Farouk K, Kula K. Accuracy and reliability of landmark-based, surface-based and voxel-based 3D cone-beam computed tomography superimposition methods. Orthod Craniofac Res. 2017;20(4):227–36. CrossRef
16.
Miclotte A, Grommen B, Cadenas de Llano-Perula M, Verdonck A, Jacobs R, Willems G. The effect of first and second premolar extractions on third molars: a retrospective longitudinal study. J Dent. 2017;61:55–66.
17.
Kim TW, Artun J, Behbehani F, Artese F. Prevalence of third molar impaction in orthodontic patients treated nonextraction and with extraction of 4 premolars. Am J Orthod Dentofacial Orthop. 2003;123(2):138–45. CrossRef
18.
Turkoz C, Ulusoy C. Effect of premolar extraction on mandibular third molar impaction in young adults. Angle Orthod. 2013;83(4):572–7. CrossRef
19.
Chipman MR. Second and third molars—their role in orthodontic therapy. Am J Orthod Dentofac Orthop. 1961;47(7):498–0. CrossRef
20.
Teng F, Du FY, Chen HZ, Jiang RP, Xu TM. Three-dimensional analysis of the physiologic drift of adjacent teeth following maxillary first premolar extractions. Sci Rep. 2019;9(1):14549. CrossRef
21.
Janson G, Putrick LM, Henriques JF, de Freitas MR, Henriques RP. Maxillary third molar position in Class II malocclusions: the effect of treatment with and without maxillary premolar extractions. Eur J Orthod. 2006;28(6):573–9. CrossRef
22.
Artun J, Thalib L, Little RM. Third molar angulation during and after treatment of adolescent orthodontic patients. Eur J Orthod. 2005;27(6):590–6. CrossRef
23.
Azizi F, Shahidi-Zandi V. Effect of different types of dental anchorage following first premolar extraction on mandibular third molar angulation. Int Orthod. 2018;16(1):82–90. PubMed
24.
Di Nardo D, Mazzucchi G, Lollobrigida M, Passariello C, Guarnieri R, Galli M, et al. Immediate or delayed retrieval of the displaced third molar: a review. J Clin Exp Dent. 2019;11(1):e55–61. PubMedPubMedCentral
25.
Sanchez-Torres A, Soler-Capdevila J, Ustrell-Barral M, Gay-Escoda C. Patient, radiological, and operative factors associated with surgical difficulty in the extraction of third molars: a systematic review. Int J Oral Maxillofac Surg. 2020;49(5):655–65. CrossRef
26.
Hasegawa T, Tachibana A, Takeda D, Iwata E, Arimoto S, Sakakibara A, et al. Risk factors associated with oroantral perforation during surgical removal of maxillary third molar teeth. Oral Maxillofac Surg. 2016;20(4):369–75. CrossRef
Metadata
Title
Influence of orthodontic treatment with premolar extraction on the spatial position of maxillary third molars in adult patients: a retrospective cohort cone-bean computed tomography study
Authors
Fangwei Pan
Zhentao Yang
Jian Wang
Ruilie Cai
Jialing Liu
Chenghao Zhang
Wen Liao
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2020
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-020-01314-0

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