Related Experiment Video
Updated: Feb 7, 2026
06:37
Temporomandibular Joint Pain Measurement by Bite Force and Von Frey Filament Assays in Mice
Published on: September 13, 2024
2.0K
Force changes associated with different intrusion strategies for deep-bite correction by clear aligners.
The Angle Orthodontist
|July 24, 2018
Summary
Clear overlay aligners create varied orthodontic forces depending on intrusion patterns. Understanding these forces is crucial for effective canine and incisor intrusion in clinical treatment.
Area of Science:
- Orthodontics
- Biomaterials Engineering
Background:
- Clear overlay aligners are widely used in orthodontic treatment.
- Predicting and controlling orthodontic forces generated by aligners is essential for treatment efficacy.
Purpose of the Study:
- To investigate the relationship between different clear overlay aligner intrusion patterns and the resulting orthodontic forces.
- To provide clinical guidance for optimizing orthodontic force application during aligner treatment.
Main Methods:
- Manufactured five sets of thermoplastic-formed aligners with varying intrusion designs.
- Measured real-time intrusion forces using a multiaxis force/torque transducer system.
- Utilized a control group (G0) and four experimental groups (G1-G4) for different intrusion scenarios.
Main Results:
- Canines experienced the largest intrusive force when intruded alone (G1).
- Canines received greater intrusive force than incisors in simultaneous intrusion (G3).
- First premolars experienced significant extrusive forces during anterior tooth intrusion (G3).
Conclusions:
- Aligner intrusion patterns significantly influence forces on incisors, canines, and premolars.
- Designed activation, attachment characteristics, and adjacent tooth movement are key factors determining orthodontic forces.
Related Concept Videos
01:15Distance Corrections
297
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
297
01:20Power Factor Correction
545
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
545
03:13Intermolecular Forces
71.5K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
71.5K
02:36Electromotive Force
30.2K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one substance to...
30.2K
01:17Design Example: Alignment of a Road Line Using GIS
350
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
350
01:14NMR Spectrometers: Resolution and Error Correction
1.1K
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
1.1K