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Relation between centric slide and Angle's classification.

Ambreen Afzal¹, Irfan Qamruddin

¹Department of Orthodontics, Karachi Medical and Dental College, Karachi, Pakistan.

Journal of the College of Physicians and Surgeons--Pakistan : JCPSP

|October 6, 2005

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This study compared sagittal cephalometric analysis in centric occlusion (CO) and centric relation (CR). A significant difference was found, particularly in Angle

Area of Science:

Orthodontics
Cephalometric Analysis
Dental Occlusion

Background:

Centric occlusion (CO) and centric relation (CR) are crucial for diagnosing malocclusions.
Discrepancies between CO and CR can impact orthodontic treatment planning.

Purpose of the Study:

To compare sagittal cephalometric analysis between CO and CR.
To evaluate these differences across Angle's classifications (Class I, II, III).

Main Methods:

Comparative, cross-sectional study involving 80 pre-treatment orthodontic patients.
Lateral cephalograms were taken in both CO and CR (using leaf gauges for deprogramming).
The ANB angle was measured for sagittal analysis and compared between the two positions.

Main Results:

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A significant difference (p<0.0001) was observed in ANB angle values between CO and CR.
Significant CO-CR discrepancy was noted in Angle's Class III patients (p<0.05) compared to Class I and II.
The mean ANB difference was greater in Class III patients.

Conclusions:

CO-CR discrepancy can occur irrespective of Angle's classification.
Particular attention should be paid to Angle's Class III patients regarding centric slide.
Accurate determination of CR is important for precise cephalometric analysis.