ETRO VUB
About ETRO  |  News  |  Events  |  Vacancies  |  Contact  
Home Research Education Industry Publications About ETRO

ETRO Publications

Full Details

Conference Publication

Measurement Methodology for Tempomandibular Joint Displacement Based on Focus Mutual Information Alignment of CBCT Images

Host Publication: XII Mediterranean Conference on Medical and Biological Engineering and Computing 2010 IFMBE Proceedings

Authors: W. Jacquet, E. Nyssen and B. Vande Vannet

Publisher: Springer

Publication Year: 2010

Number of Pages: 4

ISBN: 978-3-642-13039-7


Abstract:

Maxillofacial surgery can lead to displacement of the mandibular joint, bone resorption and finally articulatory dysfunctions. Bimaxillary surgical correction of a high angle absolute mandibular retrognathism case may provoke condylar resorption. An in vivo measurement method is developed to evaluate mandibular joint displacement aiming at correlating it with possible long-term clinical symptoms. For 6 patients two consecutive Cone Beam Computed Tomography (CBCT) images are obtained before and after functional craniofacial surgery. The images are superimposed using a fuzzy 3D alignment criterion: Focus Mutual Information (FMI), in which the operator only needs to indicate approximately the (anatomic) structure in the pre-image. Changes in the left mandibular joint are studied from the alignment of the images focussing on the left mandibular ramus. An analogous alingnment procedure is applied to the right mandibular ramus. The average age of the patients was 30 years, ranging from 16 to 48 years, 1 male and 5 female. The subtraction images reveal clear change in geometry in 7 of the 12 joints. The rotation in the horizontal plane ranges from ᆟ.2° to 8,8°, with ? = ǂ.9°, and ? = 4.9°, the rotation in the frontal plane ranges from Lj.8° to 9.5°, with ? = 0.0°, and ? = 5.1°. The translational displacement of the caput with respect to the fossa ranges from 0.2mm to 3.1mm in the horizontal plane, with ? = 1.0mm, and ? = 0.9mm. Minimal distances lower than 1mm have been observed. The semi-automatic alignment and measurement method based on FMI allows for superimposition of 3D CBCT images and makes it possible to accurately measure distortion of the mandibular joint during or immediately after orthodontic surgery allowing for instantaneous corrections.

Other Reference Styles
Other Publications

• Journal publications

IRIS • LAMI • AVSP

• Conference publications

IRIS • LAMI • AVSP

• Book publications

IRIS • LAMI • AVSP

• Reports

IRIS • LAMI • AVSP

• Laymen publications

IRIS • LAMI • AVSP

• PhD Theses

Search ETRO Publications

Author:

Keyword:  

Type:








- Contact person

- IRIS

- AVSP

- LAMI

- Contact person

- Thesis proposals

- ETRO Courses

- Contact person

- Spin-offs

- Know How

- Journals

- Conferences

- Books

- Vacancies

- News

- Events

- Press

Contact

ETRO Department

info@etro.vub.ac.be

Tel: +32 2 629 29 30

©2024 • Vrije Universiteit Brussel • ETRO Dept. • Pleinlaan 2 • 1050 Brussels • Tel: +32 2 629 2930 (secretariat) • Fax: +32 2 629 2883 • WebmasterDisclaimer