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Education - Capability Statements

Bite compressive strength testing

Tooth and jaw compressive strength and bite efficiency

Scientific research in the sphere of physiology, anatomy and medicine has far-reaching impact on the health and well-being of humankind. The methodical application of testing and investigation into how biological systems behave and react to change allows the furtherment of medical science. The discipline of dentistry can employ mechanical testing to evaluate the bite strength of the mandible/maxilla system throughout the aging and wearing process, by repeatable compressive strength tests. One specific example uses a computer-controlled test stand to compress a plaster of Paris dome-shaped sample (which has comparable mechanical properties to hard, brittle food items, like nuts) to measure ultimate bite strength. Dental model attachments to the compression plate represent the tooth profile within the jaw and in addition to the force measurement, further evaluation of the fractured sample – size and number of fragments - also influence the scientific appraisal of mechanical performance. As the teeth wear, the profile changes and the effectiveness over time of the ability to fracture the foodstuff can be determined. The test program records the peak force at fracture and uses stop-at-break functionality to avoid damage and reset, then the output data is further analysed in Excel® - allowing the flexibility to continue research out in the field, by use of portable computers. The Emperor™ software’s ability record all of the data is invaluable in the thorough understanding necessary in a scientific project. Furthermore, this ethical engineering solution negates the need to experiment with living primate specimens.

Mecmesin Systems: MultiTest computer-controlled force test system, compression plate accessory

CD003 Film 90 Degree Peel 220

Thin Films and Foils 90 Degree Peel Test

Products utilising thin films or foils to form a coating or layer require peel testing to evaluate the integrity of the adhesive bonding of the coating. Components such as flexible displays comprise layers of thin films and substrates. A 90 degree peel test can be performed to quantify the adhesive properties of samples to analyse the effectiveness of different compositions in a manufacturing, educational, or research and development environment. The test equipment must maintain the 90 degree pull angle, with the substrate remaining horizontal, achieved by means of an assisted peel table fixture. Flat jawed wedge or vice grips are needed to securely hold the thin film throughout its vertical movement.

Mecmesin Systems: MultiTest motorised test system

Case Study: Thin Film Peel

Video: Peel Test on a Foil-Sealed Wine Glass