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Initial tooth movement: force application and pain--a relationship?

M L Jones, S Richmond

American Journal of Orthodontics

|August 1, 1985

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This study measured dental crowding in patients undergoing orthodontic treatment but found no correlation between initial crowding levels and experienced discomfort. Accurate measurement methods were employed, but patient-reported pain did not align with dental arch discrepancies.

Area of Science:

Orthodontics
Dental Arch Analysis

Background:

Assessing patient discomfort following fixed appliance placement is crucial in orthodontics.
Quantifying dental crowding is essential for treatment planning and outcome prediction.

Purpose of the Study:

To measure dental crowding using a novel method and investigate its relationship with patient-discomfort.
To establish a correlation between initial tooth/arch discrepancies and patient-reported pain during orthodontic treatment.

Main Methods:

Dental casts from 24 patients were analyzed using a reflex metrograph to measure three-dimensional tooth/arch discrepancies (3 to 3 and 6 to 6).
A two-dimensional method utilizing parabolic arch shape fitting was also employed for crowding measurement.
Measurement accuracy was validated, with method errors for crowding measurements reported as RMS values.

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Main Results:

No statistically significant correlation was found between the total discomfort experienced by patients and the measured dental crowding (3 to 3 or 6 to 6).
Despite using consistent bracket width and archwire type across all patients, initial crowding did not predict discomfort levels.

Conclusions:

Initial dental crowding, as measured by tooth/arch discrepancy, does not appear to be a reliable predictor of patient discomfort during the initial phase of fixed orthodontic appliance therapy.
Further research may be needed to identify other factors influencing patient discomfort in orthodontics.