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A newer technique to program a semi adjustable articulator.

R Venkateshwaran1, Suma Karthigeyan2, P S Manoharan3

  • 1Department of Prosthodontics, Sree Balaji Dental College, Bharath University, Pallikaranai, Chennai, Tamil Nadu, India.

Journal of Pharmacy & Bioallied Sciences
|September 12, 2014
PubMed
Summary
This summary is machine-generated.

Accurate condylar guidance angles are crucial for dental prosthetics. This study found a strong correlation between semi-adjustable articulator measurements and temporomandibular joint (TMJ) radiographs in edentulous patients.

Keywords:
Horizontal condylar inclinationProgrammingTMJ tomogram

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Area of Science:

  • Dental Prosthetics
  • Biomechanical Dentistry
  • Diagnostic Imaging

Background:

  • Reproducing accurate condylar guidance angles in semi-adjustable articulators presents a significant challenge in dentistry.
  • Precise condylar guidance is essential for fabricating functional and stable dental prostheses.

Purpose of the Study:

  • To investigate the correlation between horizontal condylar inclination angles measured on a semi-adjustable articulator and those determined from temporomandibular joint (TMJ) radiographs.
  • To assess the clinical applicability of TMJ radiography for programming semi-adjustable articulators in completely edentulous subjects.

Main Methods:

  • Horizontal condylar inclination angles were recorded using a height tracer and interocclusal records in 21 edentulous subjects.
  • Temporomandibular joint (TMJ) tomogram radiographs were obtained using an orthopantomogram (OPG) machine.
  • Angles from articulator programming and radiographic tracings were manually measured and statistically analyzed using Pearson correlation (α = 0.01).

Main Results:

  • A significant positive correlation was observed between the horizontal condylar inclination angles obtained from the semi-adjustable articulator and the TMJ tomogram radiographic images.
  • The correlation coefficients were R = 0.789 (P = 0.001) for the right side and R = 0.747 (P = 0.004) for the left side.
  • The articular eminence traced on TMJ tomograms closely represented the horizontal condylar inclination, with a mean difference of 5°.

Conclusions:

  • Temporomandibular joint (TMJ) tomogram radiographic images provide a reliable representation of the horizontal condylar inclination.
  • This finding supports the use of TMJ radiography as a valuable tool for programming semi-adjustable articulators, improving the accuracy of dental prosthetics.
  • The study demonstrates a clinically relevant correlation, aiding in the reproducible setup of articulators for edentulous patients.