Teeth are vital organs for chewing and speech, serving as a barrier in the digestive system with a structure resembling a fortress wall. The tooth structure consists of three calcified hard tissues—enamel, dentin, and cementum—along with the soft pulp tissue.Despite their outward strength, teeth are vulnerable to chronic, progressive damage from bacteria and other factors—commonly known as dental caries, or "cavities." Cavities are a common dental condition. When decay reaches the dentin, it causes sensitivity to acid or cold. If it invades the pulp, it can trigger severe pain.At this stage, prompt dental filling is essential. However, before filling, root canal treatment is typically required—a process that often raises questions among patients.
Multiple Follow-up Visits Before Fillings: Is the Hospital Just Making Money?
Mr. Liu, a retired worker, had a tooth abscess on one of his upper front teeth. He recently visited the dentist. Mr. Liu mentioned that he had experienced pain several months prior and had taken anti-inflammatory and painkillers, which provided temporary relief, so he didn't seek professional treatment at the time.Recently, a fleshy lump appeared near the root, oozing pus when pressed. Examination revealed a cavity at the neck of his upper front tooth, which felt slightly loose but showed minimal sensitivity to percussion.The X-ray revealed inflammation. Before treatment, I explained to Uncle Liu that he would need to prepare mentally and schedule time for at least three follow-up appointments, one per week, to properly treat this decayed tooth. He was puzzled: Why multiple visits before a filling? Was this just a way for the hospital to make money?I patiently explained that the inflammation caused by tooth decay cannot be eliminated in a single treatment. Filling the tooth is not possible until the inflammation is completely resolved.The process requires several steps: first, using root canal enlargement needles to remove debris and create an open channel at the root canal entrance. This is followed by repeated rinsing and cleaning of the root canal with anti-inflammatory medications to eliminate bacterial toxins. Next, anti-inflammatory and antibacterial drugs are placed inside. Once the infection subsides, root canal filling material is applied. Only after the condition stabilizes and inflammation resolves can the tooth be filled with appropriate materials, completing the treatment.For teeth like this, the more thorough the treatment, the better the outcome. This prevents future inflammation from recurring and lays a solid foundation for the future. Clinically, many patients with cavities simply take some anti-inflammatory medication to deal with toothaches, treating the issue superficially. Once the pain subsides, they no longer pay attention to it. Among these patients, some fear going to the hospital, while others consider it from an economic perspective.However, these are merely symptomatic treatments that fail to address the root cause. Cavities represent damage to the tooth structure itself. Anti-inflammatory drugs cannot repair the tooth or halt the progression of decay. Therefore, patients with cavities should not delay treatment; early filling is essential to prevent the spread and advancement of decay. Of course, for inflammation such as swollen and painful gums, taking or injecting anti-inflammatory medication can be helpful.
Why Does My Tooth Still Hurt After Filling?
Xiaoguang, a self-employed business owner, is usually busy with work. Lately, whenever he chews food—whether it's cold or acidic—he feels a sharp, aching pain.Hearing that large hospitals are difficult to access, requiring long waits and significant time investment, he opted for a dental clinic near his company. The dentist diagnosed tooth decay, stating it had reached the middle layer of dentin, and proceeded with a filling. However, the discomfort and sensitivity persisted after the filling. In distress, he came to see me at the hospital. He confided, "Why does my decayed tooth still hurt after being filled?"" During my examination, I discovered the decay was quite deep. Additionally, the clinic dentist had used inappropriate filling material during the procedure. They failed to place a thermal barrier material as a base layer and instead applied a directly irritating filling material.This is a common mistake made by dentists in general dental clinics. When a cavity is deep, filling it without any insulating material underneath allows thermal stimuli to reach the pulp. This then triggers pain signals to the brain's nerves, causing the aforementioned symptoms—especially when using metal materials.After I explained this, Xiao Guang understood the reasoning. Following my treatment, his tooth was filled with a suitable pulp-protective material, layered with insulating material, and then sealed with durable silver amalgam.After a period of use and observation, Xiao Guang's previous symptoms of sensitivity to hot/cold stimuli and sour pain disappeared. He could now chew harder foods and the tooth functioned comparably to his neighboring teeth.
Why Do Fillings Keep Falling Out?
Xiaofang, an office worker, had a decayed tooth in her lower jaw. After getting it filled at a clinic, the filling fell out within a month. She returned to the same dentist for a replacement. This time, the dentist warned her to avoid biting hard foods. Though Xiaofang was careful and used the tooth sparingly, the filling still fell out after a few weeks.Xiao Fang couldn't figure out why her decayed tooth was so difficult to fill. She even suspected the dentist might have cut corners or lacked experience. So she came to see me at the hospital, anxiously asking, "Is my tooth just severely decayed, or is there a problem with the filling material that dentist chose?"After hearing Xiaofang's account, I examined her tooth and found it had a deep, extensive decay located on the crown surface. The cavity had a angular shape resembling a flared opening, making retention difficult. Without additional retention devices, the tooth simply couldn't withstand pressure and would easily fall out. This is precisely why many patients experience ineffective fillings at general dental clinics and end up seeking re-treatment at larger hospitals.
However, after reprocessing her cavity, I added a custom stainless steel screw for specialized base retention. I then selected appropriate filling materials, blended them into a composite, and adjusted the occlusal surfaces of the upper and lower teeth to reduce stress during chewing.After six months of chewing, the materials used in Xiaofang's decayed tooth showed no signs of loosening. It remained as stable as a mountain under biting pressure, allowing her to bite hard foods normally, no different from her other teeth.
The principle is actually quite simple. In daily life, we often see construction workers adding steel reinforcement bars to concrete when building bridges or houses. This ensures the structure remains stable and sturdy.Similarly, when dentists fill cavities using only standard filling materials without any anchoring devices, it's akin to pouring cement without reinforcing bars. For a cavity as large as Xiaofang's, the stability of the filling is predictably compromised. By incorporating custom stainless steel screws (equivalent to reinforcing bars) during treatment, I overcame the limitations of traditional methods.
Why Toxin-Infused Dental Implants for Toothache?
Mr. Li, a company CEO, experienced intermittent dull pain in a molar on his lower right jaw a month ago. The discomfort fluctuated, and no visible decay was detected in the mirror. Due to his busy schedule, he didn't prioritize it. Over the past week, the episodes increased slightly but remained tolerable, not interfering with work or daily life.However, last night he was awakened by the pain in the middle of the night. The anti-inflammatory and painkillers he had at home proved ineffective. Lying in bed, the toothache persisted.
Upon arriving at the clinic, Mr. Li's first words to me were, "Toothache isn't a disease, but when it strikes, it's truly agonizing. Now I've experienced it firsthand."After examining Mr. Li, I found he had unilateral, non-localized reflexive shooting pain that had now radiated to his head. Eagerly, he pleaded with me: "This tooth hurts too much. Just pull it out and be done with it." However, my examination revealed that extraction wasn't necessary. His toothache stemmed from acute pulpitis.After treatment, the tooth retained its value and could function normally.
Later, I used an analogy with Mr. Li: his tooth was like a bomb filled with explosives. Given any opportunity—no matter the cause—to ignite the fuse, the internal pressure would rise. Once it exceeded a certain threshold, it would explode.Tooth pain follows the same principle. The tooth's exterior is composed of dense, hard bone, while the pulp chamber is filled with pulp vessels and nerves. When subjected to adverse stimuli or severe friction, pulp congestion occurs.At this point, the pressure and permeability within the pulp increase. Due to the tooth's hard outer shell, the elevated pressure finds it difficult to escape or release outward. Instead, it presses on the internal pulp nerves, causing intense pain—this is "pulpitis." The urgent priority at this stage is to open the tooth cavity to relieve pressure and drain the fluid, which will quickly alleviate the toothache symptoms.