Mandibular Stability and Dentofacial Deformity

NCT ID: NCT01486069

Last Updated: 2013-06-14

Study Results

Results pending

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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Recruitment Status

COMPLETED

Total Enrollment

30 participants

Study Classification

OBSERVATIONAL

Study Start Date

2012-07-31

Study Completion Date

2013-06-30

Brief Summary

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The present study intends to clarify whether there is positional mandibular stability in patients to be submitted to orthognathic surgery. In case of any instability exists, it is needed to understand if this could be related to a particular type of dentofacial deformity or could have any short-term or long-term influence on outcomes of the orthognathic surgery.

Detailed Description

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Treatment of skeletal discrepancy nowadays is mainly performed by combination of clinical and surgical procedures in which orthodontics intends to align the teeth according to their respective alveolar bone and the surgical procedure - orthognathic surgery - realign the jaws in an adequate position among themselves and related to the rest of the craniofacial skeleton. Orthognathic surgery has developed throughout the years technically as well as regarding fixation devices for the operated segments, providing prediction of results with a low complication incidence. A debate point is related to the possible instability of the mandibular position as a reference for surgical planning due to its articulation with the temporal fossa, the temporomandibular joint. However, studies have shown that not always the mandible position obtained for the articulator reflects the position observed in subjects after induction of general anesthesia. Since there is no evidence that indicates that any alteration of the position of the mandible could influence the outcomes of a orthognathic surgery nor any relationship of a certain type of dentofacial deformity that would be beneficiated by an specific order of surgery or skeletal reference (maxilla or mandible), the present study intends to clarify some of these questions.

Conditions

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Maxillofacial Abnormalities

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

PROSPECTIVE

Study Groups

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Dentofacial Deformity

Patients with dentofacial deformities candidate to orthognathic surgery

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* Dentofacial Deformity candidate to orthognathic surgery;
* Systemically capable to be submitted to the orthognathic surgery.

Exclusion Criteria

* Patient's health condition is not stable enough to guarantee uneventful outcome;
* Required data unable to be achieved;
* Patient not agreeing to participate to the study.
Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Sao Paulo

OTHER

Sponsor Role lead

Responsible Party

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Alexandre Meireles Borba

Principal Investigator - PhD Student in Oral and Maxillofacial Surgery

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Alexandre M Borba, DDS, MSc

Role: PRINCIPAL_INVESTIGATOR

University of Sao Paulo

Locations

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Hospital Geral Universitario

Cuiabá, Mato Grosso, Brazil

Site Status

Countries

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Brazil

References

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Bamber MA, Abang Z, Ng WF, Harris M, Linney A. The effect of posture and anesthesia on the occlusal relationship in orthognathic surgery. J Oral Maxillofac Surg. 1999 Oct;57(10):1164-72; discussion 1172-4. doi: 10.1016/s0278-2391(99)90476-7.

Reference Type BACKGROUND
PMID: 10513861 (View on PubMed)

Posnick JC, Ricalde P, Ng P. A modified approach to "model planning" in orthognathic surgery for patients without a reliable centric relation. J Oral Maxillofac Surg. 2006 Feb;64(2):347-56. doi: 10.1016/j.joms.2005.10.022. No abstract available.

Reference Type BACKGROUND
PMID: 16413911 (View on PubMed)

Turvey T. Sequencing of two-jaw surgery: the case for operating on the maxilla first. J Oral Maxillofac Surg. 2011 Aug;69(8):2225. doi: 10.1016/j.joms.2010.10.050. Epub 2011 Feb 3. No abstract available.

Reference Type BACKGROUND
PMID: 21295393 (View on PubMed)

Perez D, Ellis E 3rd. Sequencing bimaxillary surgery: mandible first. J Oral Maxillofac Surg. 2011 Aug;69(8):2217-24. doi: 10.1016/j.joms.2010.10.053. Epub 2011 Feb 3. No abstract available.

Reference Type BACKGROUND
PMID: 21292376 (View on PubMed)

Weffort SY, de Fantini SM. Condylar displacement between centric relation and maximum intercuspation in symptomatic and asymptomatic individuals. Angle Orthod. 2010 Sep;80(5):835-42. doi: 10.2319/090909-510.1.

Reference Type BACKGROUND
PMID: 20578853 (View on PubMed)

Other Identifiers

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FOUSP - PhD Surg - 01

Identifier Type: -

Identifier Source: org_study_id

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