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[Physiological movements of the teeth].

Deutsche Zahnarztliche Zeitschrift

|February 1, 1980

Summary

Mandibular movements during chewing are generally within physiologic limits. However, prolonged teeth grinding (bruxism) can cause periodontal damage, while canine guidance protects lateral teeth from harmful movements.

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Area of Science:

Dental occlusion
Periodontology
Biomechanics

Context:

Investigates the physiological limits of mandibular movements and their impact on dental structures.
Utilizes inductive path recorders in paraocclusal splints for precise measurement.
Examines the effects of mastication, parafunction, and canine guidance on the periodontium.

Purpose:

To determine the physiological limits of mandibular movements during various functions.
To assess the pathological effects of bruxism on the periodontium.
To evaluate the protective role of canine guidance in preventing unphysiologic tooth movements.

Summary:

Mandibular movements, including lingual, distal, and cranial/caudal displacements up to 60 micrometers, were found to be within physiological limits during extreme positional changes without antagonist contact and empty mastication.
Prolonged teeth grinding, identified as bruxism, leads to definitive pathological alterations in the periodontium.
Canine guidance alone effectively protects lateral teeth from unphysiologic movements, suggesting its crucial role in maintaining dental health.

Impact:

Provides insights into the biomechanical responses of teeth and periodontium to different occlusal conditions.
Highlights the detrimental effects of bruxism, informing clinical interventions and preventative strategies.
Establishes the importance of canine guidance in occlusal schemes for preserving periodontal health.

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