Nerve necrosis, Dentistry FAQ

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Understanding Periodontal Disease and Tooth Restoration Options

Questions about periodontal disease, tooth fractures, and bone grafting for dental implants? Hello, Dr. Tseng. Six months ago, I experienced pain in my second molar and swelling of the gums. The dentist diagnosed me with moderate to severe periodontal disease and suspected nerve ...


Dr. Zeng Guanghui Reply:
Hello Mr. Barry: 1. You may consider consulting a periodontist. 2. The decision to use bone graft material after tooth extraction depends on the morphology of the alveolar bone and the severity of the defects. If the alveolar bone remains intact after extraction, immediate bon...

[Read More] Understanding Periodontal Disease and Tooth Restoration Options


Understanding Root Canal Treatment Duration and Post-Procedure Pain Management

The time and process required for root canal treatment and maxillary sinus protrusion? Hello Doctor, starting Saturday evening, the first tooth next to my right front tooth began to hurt. By Monday, I noticed some inflammation in my upper gums and felt like there was a small bump...


Dr. Lin Jiayong Reply:
Hello: Based on what you described, in most cases, the patient's oral mention of a "tooth abscess" or "gum bump" is likely a fistula resulting from periapical inflammation. It is recommended to inform your dentist during your next visit about the unbearab...

[Read More] Understanding Root Canal Treatment Duration and Post-Procedure Pain Management


Can Dental Fillings Be Replaced to Prevent Root Canal Treatment?

Can dental fillings be replaced or updated? Hello, doctor. Recently, I have had three fillings that have resulted in nerve necrosis requiring root canal treatment. Since there are several other fillings that have been in place for a long time, I am concerned about the possibility...


Dr. Zeng Guanghui Reply:
Hello Mr. Wei: If there is a fracture or detachment in the filling, or if you experience sensitivity to hot or cold, it is advisable to return for a follow-up appointment with your dentist for evaluation. If necessary, the filling material may need to be removed, and then conside...

[Read More] Can Dental Fillings Be Replaced to Prevent Root Canal Treatment?


Understanding Nerve Death After Dental Inlay: Causes and Patient Rights

Less than three years after getting an inlay, the nerve has died? Approximately in 2021, an inlay was placed, and there have been ongoing issues with sensitivity and an unpleasant odor from the tooth gap, but examinations indicated no problems. In May 2023, there was significant ...


Dr. Zeng Guanghui Reply:
Hello Ms. Hsiao Wei: 1. If the placement of the inlay is very close to the dental pulp, it may cause pulpitis and necrosis due to occlusal pressure or thermal stimuli. 2. It is recommended to undergo root canal treatment and to have a new crown fabricated to protect the tooth....

[Read More] Understanding Nerve Death After Dental Inlay: Causes and Patient Rights


Understanding Dental Trauma: Tooth Displacement and Nerve Health

Dental displacement due to impact? 1. The reason for the nerve necrosis in the tooth after the impact is likely due to tissue injury that did not heal properly. Trauma can cause damage to the dental pulp, leading to inflammation and eventual necrosis if the blood supply is compro...


Dr. Zeng Guanghui Reply:
1. The periodontal tissues and nerves within the impacted tooth may be damaged, and the risk of damage increases if the tooth is displaced. 2. If there is no vitality detected in the tooth after five months post-trauma, it is unlikely to regain vitality. 3. If the nerve has retur...

[Read More] Understanding Dental Trauma: Tooth Displacement and Nerve Health


Impact of Desensitizing Toothpaste on Pulp Vitality Testing

Nerve necrosis Hello, doctor. Does long-term use of sensitivity toothpaste affect the results of pulp vitality tests? Could it cause the nerve to feel less sensitive, leading to a misjudgment of localized nerve necrosis? Does localized necrosis of the dental pulp due to caries le...


Dr. Lin Jiayong Reply:
Hello: Desensitizing toothpaste helps to reduce sensitivity in exposed dentin and does not directly cause nerve necrosis. Additionally, the assessment of pulp nerve necrosis should not rely solely on pulp vitality tests. Localized issues in a single tooth are unlikely to cause ge...

[Read More] Impact of Desensitizing Toothpaste on Pulp Vitality Testing


Understanding Post-Root Canal Sensations: Is It Normal?

Root canal treated tooth It has been over a week since the root canal filling, and the area below the root canal tooth should be the alveolar bone or just beneath it. If I apply pressure while using skincare products on my chin, I notice that the tooth that underwent root canal t...


Dr. Lin Jiayong Reply:
Hello: Since the treatment was completed only about a week ago, it is not possible to determine success or failure based on subjective feelings. It is recommended to have follow-up visits once a month and to take X-rays. A definitive conclusion regarding the need for re-treatment...

[Read More] Understanding Post-Root Canal Sensations: Is It Normal?


Understanding Apex Cysts: Treatment Options and Concerns in Dentistry

Apical cyst Due to an X-ray finding, there is a sizable periapical cyst (a round structure resembling a small ball) at the apex of my front tooth, which may be about the same size as the tooth root. It is asymptomatic, and this tooth has no cavities, has never undergone root cana...


Dr. Zeng Guanghui Reply:
1. If the periapical cyst is caused by the necrosis of the nerve of the affected incisor, the cyst should gradually disappear after root canal treatment of that tooth. However, if the cyst is caused by an impacted supernumerary tooth, the cyst will not resolve even if the incisor...

[Read More] Understanding Apex Cysts: Treatment Options and Concerns in Dentistry


Black Lines on Gums After Car Accident: Dental Concerns Explained

After the car accident, a black line was found on the impacted gum area? About a month ago, I was in a car accident, and two of my upper right front teeth were fractured, leaving one-third of them remaining. Due to a laceration in my mouth, during the dressing change, I noticed a...


Dr. Lin Jiayong Reply:
Hello: It is recommended to take X-rays at 1, 3, and 6 months after a car accident or trauma to check for any signs of nerve necrosis. Since the accident just occurred, it is important to allow the body to rest and recover, so please do not be too anxious. Sincerely, Lin Chia-Yun...

[Read More] Black Lines on Gums After Car Accident: Dental Concerns Explained


Persistent Gum Bump: Causes and Effective Treatment Options

Gum abscess If you have had a gum abscess in the same location for over a year and have seen a doctor multiple times, with the abscess recurring after treatment, it is important to seek further evaluation from a dental specialist, such as an oral surgeon or periodontist. It is ...


Dr. Zeng Guanghui Reply:
If you repeatedly develop dental abscesses in the same area, it is advisable to consult a dentist for an examination to determine if there is nerve necrosis or periodontal disease affecting that tooth. Dr. Tseng Guang-Hui, Department of Dentistry, Nantou Hospital.

[Read More] Persistent Gum Bump: Causes and Effective Treatment Options


Understanding Tooth Pain After Dental Filling: When to Seek Help

Cheek pain after dental filling? Hello, Doctor. I have a left upper small molar that was filled for a cavity over six years ago. Recently, I noticed that the gums in that area often bleed. After your examination, you found a cavity and yesterday, on February 25, 2021, you removed...


Dr. Lin Jiayong Reply:
Hello: Since you have been continuously using anti-inflammatory and pain-relief medications, if the pain in your "tooth" persists for more than a week after the dental filling and affects your daily routine, it is advisable to seek medical attention and discuss with you...

[Read More] Understanding Tooth Pain After Dental Filling: When to Seek Help


Understanding Dental Abscesses and Gum Recession: Expert Insights

Dental abscess and gum recession? Dear Dr. Lin, I am writing to consult you on two issues as follows: 1. Regarding the dental abscess: Several years ago, I had a large cavity that was treated with a filling. Recently, I noticed a black mark on the surface of the tooth and a sma...


Dr. Lin Jiayong Reply:
Hello: 1. There is a common belief that when a tooth undergoes root canal treatment, it becomes dead and more prone to brittleness and fracture. Therefore, if the tooth is still functional, root canal treatment can be postponed. For younger patients or if the dental pulp has no...

[Read More] Understanding Dental Abscesses and Gum Recession: Expert Insights


Understanding Tooth Root Resorption: Causes, Symptoms, and Treatment Options

Root resorption I would like to ask the doctor, I previously injured my front tooth while playing basketball, which led to nerve necrosis, so I opted for root canal treatment. However, I did not get a crown placed after the root canal, and that was five years ago. Three years ago...


Dr. Huang Tingfang Reply:
Dear Mr. Ni, Hello! For root resorption, it is still necessary to take X-rays (to determine whether to retain or remove the tooth). If the root length is sufficient, it can be reused. Please communicate more with your dentist! Thank you! Wishing you safety! Sincerely, Dr. Hu...

[Read More] Understanding Tooth Root Resorption: Causes, Symptoms, and Treatment Options


Understanding Dental Nerve Death: Causes, Symptoms, and Treatment Options

Nerve necrosis A few days ago, I felt pain in the first tooth to the right of my front teeth, and it hurt even when drinking water. Over the past couple of days, the pain has not been very severe, but I decided to see a dentist. An X-ray was taken, and it appeared to be fine, but...


Dr. Zeng Guanghui Reply:
The necrosis of the dental pulp tissue within the closed space of the pulp chamber can lead to purulent secretions that may infect the periapical tissues through the apical foramen, causing an inflammatory response. Therefore, root canal treatment is necessary to thoroughly debri...

[Read More] Understanding Dental Nerve Death: Causes, Symptoms, and Treatment Options


Can a Facial Blow Cause Tooth Nerve Damage? Understanding the Risks

Hit on the cheek? Is it possible to sustain a dental nerve injury after accidentally being elbowed in the area of the cheek? I've heard that getting punched can lead to dental nerve necrosis...


Dr. Zeng Guanghui Reply:
The above situation may cause loosening or fracture of the dental crown or root, as well as injury to the gums. If the crown or root is fractured, it could potentially affect the dental pulp nerve. It is advisable to consult a dentist for further examination.

[Read More] Can a Facial Blow Cause Tooth Nerve Damage? Understanding the Risks


Understanding Root Canal Issues and Apex Surgery in Dental Care

Root canal issues and apical surgery? Last February, I fell and broke two front teeth and the right front tooth. Initially, the left front tooth seemed fine, but this year, an X-ray revealed nerve necrosis (the reason for this discovery was that pressing the gums caused pain). I ...


Dr. Huang Tingfang Reply:
Dear Ms. Emma, Hello! As mentioned, there may be damage at the apex of the left central incisor. Pressing on the gums near the area below the nose still causes pain, and consuming cold food also results in sensitivity similar to that of sensitive teeth. A detailed examination is...

[Read More] Understanding Root Canal Issues and Apex Surgery in Dental Care


Post-Root Canal: Understanding Gum Swelling and Pain Management

Gum swelling after root canal treatment? Hello Doctor: Due to excessive force while eating, my canine tooth became loose, and I sought medical attention after experiencing gum swelling. The doctor informed me that there is already nerve necrosis and that I need root canal treatme...


Dr. Zeng Guanghui Reply:
Excessive force during eating has led to loosened canine teeth and swollen gums. After consultation, due to nerve necrosis, root canal treatment was required. Two days post-treatment, the tooth still feels swollen, and there is pain upon palpation of the upper lip, which may indi...

[Read More] Post-Root Canal: Understanding Gum Swelling and Pain Management


Understanding Root Canal Treatment: Addressing Pain and Healing Concerns

Regarding root canal treatment? Hello: A month ago, I had a sore at the gum line of my front tooth and the adjacent lateral incisor. After healing, a small scar remained, with a red outer ring and a whitish center, but it doesn't hurt. Subsequently, the front tooth and later...


Dr. Huang Tingfang Reply:
Dear Ms. V: Hello! As mentioned, it is indeed nerve necrosis, which has led to the "mouth ulcers." After root canal treatment, it will improve! The teeth in the lower front often feel very sensitive and painful; a clinical examination is necessary to determine the cause...

[Read More] Understanding Root Canal Treatment: Addressing Pain and Healing Concerns


Understanding Root Canal Treatment: Addressing Pain and Healing Concerns

Regarding root canal treatment? Hello: A month ago, I had a sore at the gum line of my front tooth and the adjacent lateral incisor. After healing, a small scar remained, with a red outer ring and a whitish center, but it doesn't hurt. Subsequently, my front tooth and latera...


Dr. Huang Tingfang Reply:
Dear Ms. V, Hello! As mentioned, the "mouth sore" at the upper edge of the gums of your front teeth and adjacent incisors may be a fistula, which is associated with chronic inflammation. It should resolve after successful root canal treatment, so please be patient! The...

[Read More] Understanding Root Canal Treatment: Addressing Pain and Healing Concerns


Can Retainers Be Worn During Root Canal Treatment for Darkened Teeth?

After orthodontic treatment, the front teeth have turned black? My daughter had her braces removed and the wires taken out last week, and she was fitted with a retainer. However, we noticed that her front tooth has turned black. The doctor said she needs a root canal treatment. C...


Dr. Zeng Guanghui Reply:
After the removal of braces and placement of retainers, if the front teeth appear black, it may be due to the impact on the dental nerve during the tooth movement in the orthodontic process, leading to nerve necrosis. This condition requires root canal treatment. The root canal t...

[Read More] Can Retainers Be Worn During Root Canal Treatment for Darkened Teeth?


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