If you are suffering from numbness, persistent pain, or loss of taste following a dental procedure (such as wisdom tooth extraction or implant surgery), you are not alone. Our specialized clinic offers world-class microsurgical solutions for patients seeking recovery of sensation and quality of life.

Our department, led by Professor Fujita, is one of the world’s leading centers specializing in the microsurgical repair of the Lingual Nerve and Inferior Alveolar Nerve. We have provided surgical treatment to patients from across the globe.

About Professor Fujita

1. Proven Clinical Excellence (160+ Cases)

With over 25 years of experience as a Professor at Wakayama Medical University Department of Oral and maxillofacial Surgery, and North Osaka Housenka Hospital he has performed more than 160 successful microsurgical nerve repairs. This is one of the largest single-surgeon clinical databases globally.

2. Evidence-Based Success

Our surgical outcomes have been objectively analyzed and recognized in international medical literature. Notably, a meta-analysis by researchers at major U.S. universities has highlighted the high efficacy and successful recovery rates of Professor Fujita’s surgical techniques.

Reference: Meta-Analysis by researchers at major U.S. universities

References

  1. J J Oral Maxillofac Surg. 2021 Mar;79(3):697-703. doi: 10.1016/j.joms.2020.07.001. Epub 2020 Jul 10.
    Outcomes of Direct Lingual Nerve Repair After an Injury: A Systematic Review. Mark Kogan, Kevin C Lee, Sung-Kiang Chuang, Vincent B Ziccardi
  2. J Oral Maxillofac Surg. 2024 Mar;82(3):294-305. doi: 10.1016/j.joms.2023.12.006. Epub 2023 Dec 16.
    Assessing the Efficacy of Allogeneic Nerve Grafts in Trigeminal Nerve Repair: A Systematic Review. Tyler Jacobs, Saad Mohammed, Vincent Ziccardi
  3. J Oral Maxillofac Surg. 2024 Oct;82(10):1212-1223. doi: 10.1016/j.joms.2024.07.002. Epub 2024 Jul 5.
    Tyler Jacobs, Sung-Kiang Chuang, Vincent B Ziccardi

3. Global Trust

We understand the anxiety involved in traveling abroad for medical care. Professor Fujita’s expertise is sought after by patients worldwide, and we have successfully treated patients from the UK, Canada, Mexico, Brazil, and Indonesia.

Credentials: Professor Emeritus, Wakayama Medical University. Board Certified Specialist & Instructor, Japanese Society of Oral and Maxillofacial Surgeons.

Specialization: Trigeminal Nerve Reconstruction, Complex Wisdom Tooth Extraction, TMJ Disorders.

Important Notice for Consultation

We prioritize patients with physical nerve damage who are in urgent need of surgical intervention. Please review the following criteria to determine if you are a candidate.

Self-Assessment: Is Your Injury “Severe”?

  • Duration: Has it been more than 6 months since your injury with no sign of improvement? Medical data suggests spontaneous healing is highly unlikely if no recovery is felt by this point.
  • Failed Conservative Treatment: Have you been taking medications (Vitamin B12 or ATP) for months without change?
  • Loss of Localization: When you touch the numb area, are you unable to identify the exact spot? (A clinical sign of severe nerve disruption).
  • Persistent Allodynia: Do you suffer from agonizing electric-shock-like sensations or painful tingling that interferes with daily life?

Critical Timing:

  • 3 to 6 months: Nerve repair is most effective.
  • More than 12 months: Likelihood of recovery significantly decreases.
  • Less than 3 months: Observation and vitamin B12 therapy are recommended as some cases heal spontaneously.

Note: If your symptoms are gradually improving or you only experience mild “tingling” without functional loss, you are likely not a candidate for surgery.

Surgical Candidacy Self-Check

Step 1: Decision Flowchart

  1. Has it been more than 3 months since your dental procedure?
    • NO → [Wait and See] Observation and Vitamin B12 therapy recommended.
    • YES → Proceed to next question.
  2. Are your symptoms gradually improving?
    • YES → [Not a Candidate] Objective improvement or mild tingling suggests surgery is not needed.
    • NO → Proceed to next question.
  3. Can you identify the exact spot being touched in the numb area?
    • YES → [Careful Evaluation Needed] Some functional continuity may exist.
    • NO → [Surgical Evaluation Recommended] Loss of Localization indicates severe disruption.

Step 2: Evaluating Your Recovery Window

Time Since Injury Assessment & Recommended Action
3 to 6 Months [Golden Window] Surgical intervention is most effective. Early evaluation strongly recommended.
6 to 12 Months [Urgent Evaluation] Spontaneous healing is highly unlikely if no recovery has been felt.
Over 12 Months [Decreased Success Rate] Success likelihood decreases significantly, though long-term cases (10+ years) are occasionally treated.

Step 3: Pre-Inquiry Checklist

Before submitting your inquiry, ensure you have:

  • [ ] Procedure Details: Date and type of surgery (e.g., Wisdom tooth extraction Jan 2025).
  • [ ] Sensory Progress: Confirmation of no objective improvement.
  • [ ] Clinical Records: Availability of X-rays, CT, MRI, or neurosensory test records (e.g., Semmes-Weinstein Test).
  • [ ] Purpose: Seeking surgical evaluation for physical damage rather than psychological counseling.

Assessment Result & Next Steps

  • If you meet the criteria: We recommend professional screening. Please email your objective clinical data to: fujitashigeyuki6@gmail.com
  • If you do not meet the criteria: Risks may outweigh benefits. Continued monitoring by your local specialist is recommended.

Importance of Early Diagnosis

Research by Dr. Fujita indicates that earlier intervention significantly increases the odds of functional recovery. While we have successfully treated cases over 10 years old, early evaluation is strongly recommended.

While we also treat many long-term cases (even those abandoned for over 10 years), early evaluation is strongly recommended to achieve the best possible outcome.

References

  1. Maxillofac Plast Reconstr Surg. 2026 Jan 14;48:2. doi: 10.1186/s40902-026-00500-4. (Open Access )
    Prognostic factors for functional recovery after lingual nerve reconstruction using an artificial nerve conduit. Shigeyuki Fujita, Shigeru Suzuki, Osamu Sakaguchi, Itaru Tojyo.
  2. Maxillofac Plast Reconstr Surg. 2019 Dec 23;41:60. doi: 10.1186/s40902-019-0243-z. eCollection 2019 Dec. (Open Access )
    A case report of a long-term abandoned torn lingual nerve injury repaired by collagen nerve graft induced by lower third molar extraction. Shigeyuki Fujita, Naoki Mizobata, Takashi Nakanishi, Itaru Tojyo.

Symptoms We Treat

Many patients are told to “wait and see,” but severe injuries often require surgery. Contact us if you experience:

  • Numbness or Hypesthesia: Loss of sensation in the tongue or chin.
  • Allodynia: Persistent, painful tingling or electric-shock sensations.
  • Loss of Taste: Impaired ability to enjoy food (lingual neuropathy).
  • Functional Issues: Frequently biting your tongue or difficulty speaking.

Treatment Process for International Patients

  1. Initial Consultation: We will confirm your medical history and current symptoms via email. We will ask about your age, medical history, and current symptoms. We will ask about the time of your injury and your current symptoms.
  2. Comprehensive Neurosensory Testing: Patients diagnosed with severe injuries are asked to visit our hospital, where we use the American Clinical Neurosensory Test and, in the case of lingual nerve injury, the Tinel’s sign test to accurately diagnose the severity of the injury and ultimately determine whether surgery is appropriate.
  3. Surgical Plan: If surgery is required, we use microsurgical nerve repair (e.g., direct suture or nerve conduit) under general anesthesia.
  4. Short Hospital Stay:Typically, patients only need to stay for about 10 days, from the first day before surgery until the stitches are removed.
  5. Recovery Support:Long-term follow-up and guidance on sensory rehabilitation is usually provided for at least three years.

References

  1. Maxillofac Plast Reconstr Surg. 2023 Jun 19;45:21. doi: 10.1186/s40902-023-00389-3. (Open Access )
    Application of Tinel’s test combed with clinical neurosensory test distinguishes spontaneous healing of lingual nerve neuropathy after mandibular third molar extraction. Shigeyuki Fujita, Itaru Tojyo, Shigeru Suzuki, Fumihiro Tajima .
  2. J Oral Maxillofac Surg. 2023 Nov;81:1325-1327. doi: 10.1016/j.joms.2023.08.169. Epub 2023 Sep 7.
    What is the Significance of the Modified Tinel Sign in Lingual Nerve Injuries? Benjamin Palla, Joshua Habermann, John Anderson, Michael Miloro.

Cases We Do Not Treat (Exclusions)

  • Symptoms that are gradually improving or mild “tingling”.
  • Psychological counseling or treatment for psychosomatic disorders/atypical odontalgia.
  • Inquiries regarding general anxiety without objective clinical evidence of nerve injury.

Automated Screening Email Content

Subject: Important: Screening Criteria for Trigeminal Nerve Reconstruction – Prof. Fujita
Thank you for contacting the Department of Oral and Maxillofacial Surgery at Kita-Osaka Housenka Hospital.
This is an automated response to guide you through our Surgical Eligibility Screening. To maintain the highest standard of care for patients in critical need, Professor Fujita reviews only those inquiries that meet specific objective clinical criteria.
Please read the following carefully and reply with the required information if you believe you are a candidate for surgery.

  1. Primary Surgical Criteria (Self-Check)
  2. Please confirm if your condition meets the following clinical signs of severe nerve injury:
    Timing: Is it between 3 to 12 months since your injury? (Note: Injuries less than 3 months old may still heal spontaneously ).
    Loss of Localization: When you touch the numb area, are you unable to identify the exact spot being touched?
    No Improvement: Have you seen zero objective improvement despite taking medications (Vitamin B12/ATP) for months?
    Severe Symptoms: Do you suffer from persistent allodynia (electric-shock pain) or a total loss of taste?

  3. Cases We Do Not Treat (Exclusions)
  4. We cannot offer surgical intervention or consultation for the following:
    Symptoms that are gradually improving.
    Mild “tingling” without functional loss.
    Psychosomatic disorders, atypical odontalgia, or general anxiety.

  5. Required Information for Evaluation
  6. To proceed with a clinical evaluation, please reply to this email (or email fujitashigeyuki6@gmail.com) with the following.
    1.Date and Type of Procedure: (e.g., Wisdom tooth extraction in Jan 2025).
    2.Sensory Progress: Has there been any objective improvement since the injury? (Yes/No).
    3.Clinical Records: Attach X-rays (Panoramic), CT, MRI, or Neurosensory test results (e.g., Semmes-Weinstein Test) from your local specialist.

  7. Next Steps
  8. If your provided data indicates a high likelihood of physical nerve damage, we will contact you to schedule a comprehensive neurosensory test at our hospital in Osaka, Japan. Please note that a typical surgical stay requires approximately 10 days.

    We appreciate your understanding of our prioritization process for urgent surgical cases.

  9. Sincerely,
  10. Department of Oral and Maxillofacial Surgery North Osaka Housenka Hospital Prof S Fujita

Accommodation Guide & Clinical Access

Hospital Location: Ibaraki City, Osaka.

Access:

  • By Train: From Kansai International Airport (KIX), take the Airport Express “Haruka” to JR Shin-Osaka Station (50 mins). Transfer to JR Kyoto Line to JR Ibaraki Station (10 mins) → Taxi.
  • By Bus: Direct limousine bus from KIX to JR Ibaraki Station (80 mins).

Stay: The area around JR Ibaraki Station is most convenient, with several hotels, supermarkets, and pharmacies within walking distance.

Frequently Asked Questions (FAQ)

Q1: How long is the typical hospital stay?
A1: Approximately 10 days.

Q2: What kind of surgical techniques are used?
A2: We utilize microsurgical nerve repairs, such as direct suturing or the use of nerve conduits (collagen grafts), under general anesthesia.

Q3: How soon will I see results?
A3: Nerve recovery is a slow process. Functional improvement may take months, and we follow up for at least 3 years.

Q4: Is surgery always effective?
A4: Success depends on the timing and severity. Early intervention (3-6 months) increases the odds significantly.

Q5: What about the language barrier? Is the staff experienced with international patients?
A5: Yes. Our department, led by Professor Emeritus Shigeyuki Fujita, has successfully treated patients from the UK, Canada, Mexico, Brazil, and Indonesia. We manage initial consultations and screening via email to ensure clear communication.

Q6: What if my symptoms are already improving?
A6: If your symptoms are gradually improving or you only experience mild tingling, you are likely not a candidate for surgery. We focus on severe cases where spontaneous healing is highly unlikely.

Q7: Can I use a credit card for payment?
A7: Details regarding payment methods will be provided individually after the screening process is completed.

[Important: Please Read After Submitting Your Inquiry] After you send your initial inquiry, you will receive an automated screening email providing detailed guidance on our surgical criteria and necessary medical documentation. Please check your inbox (and spam folder) immediately.

Please note: To maintain the highest standard of care for those in critical need, we will only review and respond to inquiries that fulfill the objective criteria outlined in that email.

After submitting your inquiry, you will receive an automated screening email. Please read it carefully, as it contains essential criteria for surgical eligibility. Inquiries that do not meet the objective criteria or those seeking emotional support rather than surgical evaluation may not receive a reply.

Email for Initial Inquiry

© 2026 Department of Oral and Maxillofacial Surgery, Kita-Osaka Housenka Hospital
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