3D Comparison of Anterior Teeth Retraction and Anchorage Control Between En-masse and Two-step Mechanics
NCT ID: NCT03903575
Last Updated: 2019-04-05
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
NA
32 participants
INTERVENTIONAL
2019-04-03
2020-12-31
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
SINGLE
Study Groups
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En Masse Retraction
Group treated by retracting the six anterior teeth simultaneously.
En masse anterior teeth retraction
After extraction of the four premolars the posterior teeth will be tied-together and the six anterior teeth will be retracted by sliding mechanics.
Two-Step Retraction
Group treated by retracting the canines incisors in two different steps.
Two-Step Retraction
After extraction of the four premolars the posterior teeth will be tied-together and the canines will be retracted by sliding mechanics. After the distalization of the canines they will be tied to the posterior teeth and the incisors will be retracted by sliding mechanics.
Interventions
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En masse anterior teeth retraction
After extraction of the four premolars the posterior teeth will be tied-together and the six anterior teeth will be retracted by sliding mechanics.
Two-Step Retraction
After extraction of the four premolars the posterior teeth will be tied-together and the canines will be retracted by sliding mechanics. After the distalization of the canines they will be tied to the posterior teeth and the incisors will be retracted by sliding mechanics.
Eligibility Criteria
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Inclusion Criteria
* Bimaxillary protrusion;
* Convex profile;
* All natural teeth present in the mouth;
* Absence of crowding or with negative discrepancy up to 4mm;
* Absence of vertical and transverse occlusal problems;
* Good oral health;
* Good general health.
Exclusion Criteria
* Patients with severe systemic and psychological illness;
* Patients with parafunction (bruxism), reflux or eating disorders;
* Presence of periodontal disease;
18 Years
40 Years
ALL
Yes
Sponsors
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
OTHER_GOV
Rio de Janeiro State University
OTHER
Responsible Party
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Sergio Roberto de Oliveira Caetano
Masters in Orthodontics, PhD Student
Principal Investigators
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Sergio Caetano, MSc
Role: PRINCIPAL_INVESTIGATOR
Rio de Janeiro State University
Flavia Artese, PhD
Role: STUDY_DIRECTOR
Rio de Janeiro State University
Jose Augusto M Miguel, PhD
Role: STUDY_CHAIR
Rio de Janeiro State University
Locations
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Faculdade de Odontologia - UERJ
Rio de Janeiro, , Brazil
Countries
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Central Contacts
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Facility Contacts
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References
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Heo W, Nahm DS, Baek SH. En masse retraction and two-step retraction of maxillary anterior teeth in adult Class I women. A comparison of anchorage loss. Angle Orthod. 2007 Nov;77(6):973-8. doi: 10.2319/111706-464.1.
Xu TM, Zhang X, Oh HS, Boyd RL, Korn EL, Baumrind S. Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques. Am J Orthod Dentofacial Orthop. 2010 Nov;138(5):544.e1-9; discussion 544-5. doi: 10.1016/j.ajodo.2009.12.027.
Schneider PP, Gandini Junior LG, Monini ADC, Pinto ADS, Kim KB. Comparison of anterior retraction and anchorage control between en masse retraction and two-step retraction: A randomized prospective clinical trial. Angle Orthod. 2019 Mar;89(2):190-199. doi: 10.2319/051518-363.1. Epub 2018 Nov 26.
Leonardi R, Annunziata A, Licciardello V, Barbato E. Soft tissue changes following the extraction of premolars in nongrowing patients with bimaxillary protrusion. A systematic review. Angle Orthod. 2010 Jan;80(1):211-6. doi: 10.2319/010709-16.1.
Kojima Y, Fukui H. Numerical simulation of canine retraction by sliding mechanics. Am J Orthod Dentofacial Orthop. 2005 May;127(5):542-51. doi: 10.1016/j.ajodo.2004.12.007.
Bennett JC, McLaughlin RP. Controlled space closure with a preadjusted appliance system. J Clin Orthod. 1990 Apr;24(4):251-60. No abstract available.
Ribeiro GL, Jacob HB. Understanding the basis of space closure in Orthodontics for a more efficient orthodontic treatment. Dental Press J Orthod. 2016 Mar-Apr;21(2):115-25. doi: 10.1590/2177-6709.21.2.115-125.sar.
Pervin S, Rolland S, Taylor G. En masse versus two-step retraction of the anterior segment. Evid Based Dent. 2018 Dec;19(4):111-112. doi: 10.1038/sj.ebd.6401343.
Rizk MZ, Mohammed H, Ismael O, Bearn DR. Effectiveness of en masse versus two-step retraction: a systematic review and meta-analysis. Prog Orthod. 2018 Jan 5;18(1):41. doi: 10.1186/s40510-017-0196-7.
Cevidanes LH, Bailey LJ, Tucker GR Jr, Styner MA, Mol A, Phillips CL, Proffit WR, Turvey T. Superimposition of 3D cone-beam CT models of orthognathic surgery patients. Dentomaxillofac Radiol. 2005 Nov;34(6):369-75. doi: 10.1259/dmfr/17102411.
Cevidanes LH, Styner MA, Proffit WR. Image analysis and superimposition of 3-dimensional cone-beam computed tomography models. Am J Orthod Dentofacial Orthop. 2006 May;129(5):611-8. doi: 10.1016/j.ajodo.2005.12.008.
Feldmann I, Bondemark L. Orthodontic anchorage: a systematic review. Angle Orthod. 2006 May;76(3):493-501. doi: 10.1043/0003-3219(2006)076[0493:OA]2.0.CO;2.
Geron S, Shpack N, Kandos S, Davidovitch M, Vardimon AD. Anchorage loss--a multifactorial response. Angle Orthod. 2003 Dec;73(6):730-7. doi: 10.1043/0003-3219(2003)0732.0.CO;2.
Domingo-Clerigues M, Montiel-Company JM, Almerich-Silla JM, Garcia-Sanz V, Paredes-Gallardo V, Bellot-Arcis C. Changes in the alveolar bone thickness of maxillary incisors after orthodontic treatment involving extractions - A systematic review and meta-analysis. J Clin Exp Dent. 2019 Jan 1;11(1):e76-e84. doi: 10.4317/jced.55434. eCollection 2019 Jan.
Keim RG. Space closure and anchorage control. J Clin Orthod. 2013 Mar;47(3):153-4. No abstract available.
Keim RG. The challenge of bimaxillary protrusion. J Clin Orthod. 2017 Jun;51(6):315-316. No abstract available.
Liu Y, Olszewski R, Alexandroni ES, Enciso R, Xu T, Mah JK. The validity of in vivo tooth volume determinations from cone-beam computed tomography. Angle Orthod. 2010 Jan;80(1):160-6. doi: 10.2319/121608-639.1.
Shearn BN, Woods MG. An occlusal and cephalometric analysis of lower first and second premolar extraction effects. Am J Orthod Dentofacial Orthop. 2000 Mar;117(3):351-61. doi: 10.1016/s0889-5406(00)70240-x.
Ong HB, Woods MG. An occlusal and cephalometric analysis of maxillary first and second premolar extraction effects. Angle Orthod. 2001 Apr;71(2):90-102. doi: 10.1043/0003-3219(2001)0712.0.CO;2.
Solem RC, Marasco R, Guiterrez-Pulido L, Nielsen I, Kim SH, Nelson G. Three-dimensional soft-tissue and hard-tissue changes in the treatment of bimaxillary protrusion. Am J Orthod Dentofacial Orthop. 2013 Aug;144(2):218-28. doi: 10.1016/j.ajodo.2013.03.018.
Williams R, Hosila FJ. The effect of different extraction sites upon incisor retraction. Am J Orthod. 1976 Apr;69(4):388-410. doi: 10.1016/0002-9416(76)90208-6.
Yoshida N, Koga Y, Mimaki N, Kobayashi K. In vivo determination of the centres of resistance of maxillary anterior teeth subjected to retraction forces. Eur J Orthod. 2001 Oct;23(5):529-34. doi: 10.1093/ejo/23.5.529.
Other Identifiers
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04186818.2.0000.5259
Identifier Type: -
Identifier Source: org_study_id
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