Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

Digitally subtracted linear tomograms: three techniques for measuring condylar displacement.

J B Ludlow¹, R Soltmann, D Tyndall

¹Department of Diagnostic Sciences, University of North Carolina School of Dentistry, Chapel Hill.

Oral Surgery, Oral Medicine, and Oral Pathology

|November 1, 1991

Summary

This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Correction to Effective dose of dental CBCT--a meta analysis of published data and additional data for nine CBCT units.

Dento maxillo facial radiology·2015

Same author

3D osteoarthritic changes in TMJ condylar morphology correlates with specific systemic and local biomarkers of disease.

Osteoarthritis and cartilage·2014

Same author

Effective dose of dental CBCT-a meta analysis of published data and additional data for nine CBCT units.

Dento maxillo facial radiology·2014

Same author

Advanced fluorescence lifetime imaging algorithms for CMOS single-photon sensor based multi-focal multi-photon microscopy.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2013

Same author

Note: multi-confocal fluorescence correlation spectroscopy in living cells using a complementary metal oxide semiconductor-single photon avalanche diode array.

The Review of scientific instruments·2013

Same author

Ex vivo comparison of Galileos cone beam CT and intraoral radiographs in detecting occlusal caries.

Dento maxillo facial radiology·2011

Same journal

The relation of the physical character of the diet to the health of the periodontal tissues; a critical review of the literature.

Oral surgery, oral medicine, and oral pathology·2010

Same journal

Psychosomatic factors in the etiology of periodontal disease; a critical review of the literature.

Oral surgery, oral medicine, and oral pathology·2010

Same journal

Bacteriologic investigations of the oral spirochetal flora in ulcerative stomatitis (Vincent's infection).

Oral surgery, oral medicine, and oral pathology·2010

Same journal

The nature and significance of infection in periodontal disease.

Oral surgery, oral medicine, and oral pathology·2010

Same journal

Histopathology of periodontal diseases.

Oral surgery, oral medicine, and oral pathology·2010

Same journal

Metastasis of chondromyxosarcoma to the jaw and tooth.

Oral surgery, oral medicine, and oral pathology·2010

See all related articles

Three tomographic techniques accurately quantified small condylar position changes, with typical differences of 0.1-0.2 mm. Inferior displacements showed slightly higher accuracy due to better fossa registration.

Area of Science:

Dentistry
Medical Imaging
Biomechanics

Background:

Accurate measurement of condylar position is crucial for diagnosing temporomandibular joint disorders.
Digital subtraction enhancement offers potential for precise quantification of small positional changes.

Purpose of the Study:

To compare the accuracy of three tomographic technique variations in quantifying small condylar displacements.
To evaluate the impact of different angular corrections on measurement accuracy.

Main Methods:

A skeletal phantom with 0.1 mm positioning accuracy was used to simulate condylar movements.
Linear tomographic images were acquired at various displacements (0.1 mm increments) and orientations.
Digital subtraction enhancement and blinded observer measurements were employed.

Related Experiment Videos

Main Results:

All three tomographic techniques demonstrated similar accuracy in quantifying condylar displacements.
Typical absolute differences between measured and expected values were 0.2 mm (posterior), 0.2 mm (lateral), and 0.1 mm (inferior).
Inferior displacement measurements were significantly more accurate, attributed to improved fossa registration.

Conclusions:

Tomographic techniques, particularly with digital subtraction enhancement, are effective for quantifying small condylar position changes.
The choice of angular correction (arbitrary vs. individualized) did not significantly impact overall accuracy.
Accurate registration of anatomical landmarks, like the fossa, is critical for precise condylar position measurement.