At which temperature that gutta percha reach the alpha temp:
a- 42-48 c ******
b- 50-60
c- 70-80
d- 100c
----------------------------
The term gutta-percha can be used to describe two elements, the first refers to a plant belonging to the genus of the palaquium, while the second is applied to name an elastic material of hard consistency which is manufactured from the sap draining trees belonging to the genus described above, its shape is very similar to rubber, elastic, crystalline and solid consistency, for half of the nineteenth century it was gaining importance, to the point that by 1851 it is estimated that they were imported to the Kingdom United more than a thousand tons.
Like rubber, gutta-percha is a polymer, however they differ because gutta-percha is a trans isomer, which makes it less flexible, another significant difference is the molecular weight being that of rubber greater than 100 thousand while that of the gutta percha is barely 7 thousand.
Before gutta percha was exported to England and before it became what it was, it was used by the native peoples of the Malay archipelago, in order to make the mangoes for certain tools, later John Tradescant was the one who brought to light to the material while making a trip to the Far East, where he would end up running into the gutta percha in 1656, giving it the name of “Mazer wood”, but it was only William Montgomerie (medical soldier) who gave him quite practical uses in the area of medicine, which allowed him to be awarded the gold medal by the Royal Society for the promotion of the Arts.
In England this material was widely used, using it in different areas, both in the industrial and domestic branches, one of the many applications for which gutta percha was used, was as an insulator for the cables that made communication with the Telegraph, since they were underwater, the exploitation of this material was such that it overexploited it to the point of being practically unsustainable leading to a collapse of its supply.
----------------------------
The term gutta-percha can be used to describe two elements, the first refers to a plant belonging to the genus of the palaquium, while the second is applied to name an elastic material of hard consistency which is manufactured from the sap draining trees belonging to the genus described above, its shape is very similar to rubber, elastic, crystalline and solid consistency, for half of the nineteenth century it was gaining importance, to the point that by 1851 it is estimated that they were imported to the Kingdom United more than a thousand tons.
Like rubber, gutta-percha is a polymer, however they differ because gutta-percha is a trans isomer, which makes it less flexible, another significant difference is the molecular weight being that of rubber greater than 100 thousand while that of the gutta percha is barely 7 thousand.
Before gutta percha was exported to England and before it became what it was, it was used by the native peoples of the Malay archipelago, in order to make the mangoes for certain tools, later John Tradescant was the one who brought to light to the material while making a trip to the Far East, where he would end up running into the gutta percha in 1656, giving it the name of “Mazer wood”, but it was only William Montgomerie (medical soldier) who gave him quite practical uses in the area of medicine, which allowed him to be awarded the gold medal by the Royal Society for the promotion of the Arts.
In England this material was widely used, using it in different areas, both in the industrial and domestic branches, one of the many applications for which gutta percha was used, was as an insulator for the cables that made communication with the Telegraph, since they were underwater, the exploitation of this material was such that it overexploited it to the point of being practically unsustainable leading to a collapse of its supply.
Labels
Endodontics