psychochemist

Chapter 268 Galvanic Effect
The reason why people feel pain is sometimes not their own reasons, but just being in the wrong position.

Yu Fan's mind seemed to go through an electric shock, and he remembered some inspiration, and walked back to Aunt Lu's house with a smile on his face.

He went upstairs and rang the doorbell. This time, Yu Fan waited patiently. He knew that Aunt Lu had bad legs and it would take a long time to open the door.

After waiting for a while, the waiting time was a little longer than before.The door finally opened.To Yu Fan's surprise, Aunt Lu, who was already crying just now, had already put on the makeup on her face again.Aunt Lu's "requirements" for herself are really too strict.

Aunt Lu: "Fanfan, why are you back again? Did you forget something?"

Yu Fan smiled shyly and said, "I haven't forgotten anything, but I may have forgotten one thing."

Aunt Lu frowned and asked in confusion, "What's the matter?"

Yu Fan: "Aunt Lu, let me ask you. Did you have your teeth fixed in this dental clinic downstairs a few days ago?"

Aunt Lu: "Yes? What?"

Yu Fan asked again: "After you got your teeth back, you started to have a headache, right?"

Aunt Lu nodded and said, "Yes, it was very windy the day I got my teeth inlaid. After being blown by the wind, I started to have a headache the next day. I went to the health center of the community and tried to take medicine. But it won't take long, and I'm still dizzy. If it's still not good after a year, I'm going to go to a bigger hospital for another look."

Yu Fan: "Then the material of your tooth inlay is gold?"

Aunt Lu: "Yes, I thought, people are getting old, and I don't know who to leave the money I saved. In the last days, I want to treat myself better, so I changed this gold tooth. You saw it just now."

Yu Fan nodded, smiled and said, "Aunt Lu, have you had your teeth filled before?"

Aunt Lu wondered: "I made it up, I made it up many years ago, how do you know?"

Yu Fan said more confidently: "If I'm not mistaken, the tooth you filled is made of amalgam, right? And the two teeth happen to be the upper and lower jaws!"

Aunt Lu was even more surprised, she covered her mouth and asked, "How do you know?"

Yu Fan smiled gently and said, "Aunt Lu, I think I know why you have a headache. In fact, it's not the wind at all. It's the electricity!"

Aunt Lu was even more puzzled, and asked: "The problem with electricity? What does this mean? What electricity? Where does it come from? What is the electricity?"

Yu Fan patiently explained: "In your mouth, silver amalgam was used to fill your teeth, but now your teeth are made of gold. If you use silver amalgam to fill your lower jaw, and the tooth on the opposite jaw There is also a metal crown (non-amalgam material, such as gold) at the position. The two dental materials are in contact with each other. Since the human body is a conductor and there are a small amount of ions in saliva, it will produce an original dental crown during the bite. Battery effect. Called 'galvanic effect' in dentistry."

Aunt Lu: "The galvanic effect?"

Yu Fan: "That's right! Let me ask you again. Recently, when you were talking or eating, did you suddenly experience a stabbing pain like an electric shock?"

Aunt Lu said in surprise and surprise: "Yes, yes! That's it! I thought I was getting angry, and my teeth hurt."

Yu Fan said calmly: "That's right, this is the characteristic of the 'galvanic effect'. Of course, the current generated by the galvanic effect will not be very strong in theory, but it is enough to cause discomfort for sensitive teeth. Especially when you have pulp in those two teeth. Toothache is radiating, it can radiate to the adjacent teeth, the opposing teeth, the face and the head. So it’s normal for you to feel a headache.”

Aunt Lu suddenly realized: "Thank you so much, Fanfan, you have helped me a lot. If you don't come to tell me about this today, I probably won't find anything when I go to the hospital. This headache might be serious. Thank you so much for being with me forever."

Yu Fan said modestly: "Aunt Lu, you are welcome. This dental clinic is new, and it is reasonable for them to neglect this detail. Just ask them to deal with it for you as soon as possible."

Aunt Lu: "Thank you, Fanfan, I will make time to go."

Yu Fan bit his lip at this moment, hesitated for a moment, and asked again: "Aunt Lu, although I am a junior, I still want to persuade you that life is not our enemy. It's true to be strong, but you can't It should be head-to-head with life.”

Aunt Lu said calmly: "I think what you said is reasonable, but why do you feel that I am head-on with life?"

Yu Fan: "I just arrived at your home and looked around for a week. Even though your legs and feet are already so inconvenient, I didn't see any power tools in your home, neither crutches nor wheelchairs. You are beautifully dressed. On the one hand, you are In order to get to know your son better, but another psychological explanation is trying to fight against time. These all reflect the essence of your strong woman. But this is not good for your quality of life."

Aunt Lu smiled and said: "Fanfan, you are really careful. This is different from your carefree grandma. I also know that I am tired like this, but I can't help it. It is difficult for me to control myself. I have been It’s all because of this ‘struggle’, and it’s all because of this ‘struggle’ that I can live until now. Now you may not be able to appreciate our days. Everyone wants to live easily, but no one You can have such a free and easy realm.”

Yu Fan: "..."

Aunt Lu said earnestly: "Fanfan, your family background is good, and your family education is also very pure. Many people in this world envy you for such conditions. Auntie is not as lucky as you, but Auntie hopes that you can cherish it and cherish it. Getting along with family members, even if there are conflicts and quarrels, but when you look back decades later, they are all sweet troubles. Protect your home, and you can help more people.”

Yu Fan received the lesson humbly. It's getting late, and it's time for Yu Fan to go back. Yu Fan: "Okay, Aunt Lu, I'll go back first. If you have any difficulties, please call me."

Yu Fan said goodbye to Aunt Lu again and left.Aunt Lu stood at the door for a long time, and did not close the door until Yu Fan walked out of the unit.

The warm sun was shining on the ground, Yu Fan raised his head and looked at the sky with relief, as if there was a pair of eyes watching Yu Fan from afar in the universe, Yu Fan said to himself: "Grandma, if you are here, you too It will definitely do this, right?" The sun flickered for a moment, as if it was a response from the universe.

Two metals with different electron valence collide together in the presence of a medium to produce a galvanic effect.Is it the same for two completely different people staying together?For some reason, the image of his father suddenly flashed in Yu Fan's mind, but only for a moment.

Yu Fan put on his hat and disappeared into the "warm" cold wind.

　People live not for happiness, but for hope —— Sodium Chloroaurate

　　
　
(End of this chapter)