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Related Concept Videos

Simple Pendulum01:10

Simple Pendulum

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A simple pendulum consists of a small diameter ball suspended from a string, which has negligible mass but is strong enough to not stretch. In our daily life, pendulums have many uses, such as in clocks, on a swing set, and on a sinker on a fishing line. 
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Torsional Pendulum01:09

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A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
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Physical Pendulum01:06

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When a rigid body is hanging freely from a fixed pivot point and is displaced, it oscillates similar to a simple pendulum and is known as a physical pendulum. The period and angular frequency of a physical pendulum are obtained by using the small-angle approximation and drawing parallels with a spring-mass system. The small-angle approximation (sinθ=θ) is valid up to about 14°.
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Concept of Resonance and its Characteristics01:19

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If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
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The mechanical energy E of a system is the sum of its potential energy U and the kinetic energy K of the objects within it. What happens to this mechanical energy when only conservative forces cause energy transfers within the system—that is, when frictional and drag forces do not act on the objects in the system? Also assume that the system is isolated from its environment; in other words no external force from an object outside the system causes energy changes inside the system.
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Related Experiment Video

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Bonded Pendulum Appliance.

S S Chopra1, S S Pandey2

  • 1Graded Specialist (Orthodontia), Naval Institute of Dental Sciences, INHS Asvini, Mumbai.

Medical Journal, Armed Forces India
|July 14, 2016
PubMed
Summary
This summary is machine-generated.

The Pendulum Appliance offers a reliable, compliance-independent solution for distalizing maxillary molars in Class II division 1 malocclusions. This orthodontic device simplifies treatment with easy fabrication and minimal patient cooperation needed.

Keywords:
Non-complianceOrthodontic treatmentPendulum appliance

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Area of Science:

  • Orthodontics
  • Dentofacial Orthopedics

Background:

  • Class II division 1 malocclusions often necessitate space creation for effective treatment.
  • Patient compliance is a significant factor in the success of many orthodontic therapies.

Purpose of the Study:

  • To evaluate the Pendulum Appliance as a method for distalizing maxillary molars.
  • To highlight the advantages of the Pendulum Appliance in orthodontic treatment.

Main Methods:

  • The Pendulum Appliance was utilized for maxillary molar distalization.
  • Fabrication, activation, and adjustment procedures were assessed.

Main Results:

  • The Pendulum Appliance demonstrated effectiveness and reliability in distalizing maxillary molars.
  • Key advantages include minimal patient compliance, ease of fabrication, and single activation.

Conclusions:

  • The Pendulum Appliance is an excellent, cost-effective choice for routine orthodontic practice.
  • Its design facilitates minor transverse and vertical molar corrections and ensures patient acceptance.