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Oral-Maxillofacial Surgery and Orthodontics

The Department of Oral-Maxillofacial Surgery and Orthodontics mainly provides medical care for patients with congenital or acquired abnormalities of the teeth and jaw such as maxillofacial deformities, maxillofacial trauma, and oral tumors; and other severe systemic diseases.

Medical services

A team of physicians, dentists, and speech therapists provide interdisciplinary treatments, such as oral, dental and maxillary surgery (oral-maxillofacial surgery) for oral inflammation and tumors; prosthetic treatments using artificial teeth and dental implants (prosthetic dental treatment) for deficient teeth and maxilla due to tumor and trauma; improvement of dental articulation in patients with significant maxillary deformation and control of jaw growth (orthodontics).

Diagnosis and treatment policy

At the first consultation, a doctor specializing in the treatment required for each patient is assigned to the case. This is followed by, if necessary, x-ray examination, blood tests, stomatognathic function test, tissue biopsy, and other examinations. The final treatment plan is determined through discussion based on these specialized test results.


Department of Oral-Maxillofacial Surgery

Surgical treatment for cleft lip and palate, maxillofacial deformities, maxillofacial fractures, and maxillofacial tumors; treatment for language disorders; management of temporomandibular joint disease, oral inflammation, etc.

Department of Orthodontics
  • Prosthetic dentistry
    Treatment for congenital anomalies such as cleft lip and palate, prosthetic deficient teeth and maxilla after trauma and tumor resection (artificial teeth, bridging, dental implants, etc.)
  • Orthodontic dentistry
    Management of maxillary growth in infants with congenital maxillofacial anomalies such as clef t lip and palate; pre-and postoperative management of dental articulation in patients with maxillofacial deformities, maxillofacial fracture and maxillofacial tumors

Target diseases

Congenital maxillofacial anomalies (cleft lip and palate, branchial arch syndrome, craniosynostosis, etc.), maxillofacial deformities (mandibular protrusion, maxillary protrusion, etc.), maxillofacial fractures, maxillofacial defects, temporomandibular joint disease, salivary gland disease, jawbone cysts, pericoronitis of the wisdom teeth, impacted teeth, oral tumors, oral inflammation, language disorders

Advanced treatments/ Specialized treatments

Jaw bone extension

Gradual extension of the jaw bone

Transplantation of tailor-made artificial bone for the face
Implant dental prosthetics

Improvement of dental articulation using implant techniques

Frequently performed tests

  • Dental x-ray and panoramic x-ray examinations : Detection of abnormality in the teeth and jaw
  • Standard head x-ray examination : Quantitative analysis of maxillofacial shape
  • Stomatognatic function test : Evaluation of jaw movement and masticatory muscles
  • Three-dimensional maxillofacial model : Understanding of maxillofacial deformation and fractured bones
  • Various language function tests : Articulation, nasopharyngeal function, language development, etc.
Kazuto Hoshi

Kazuto Hoshi


Oral-Maxillofacial Surgery and Orthodontics, Department of Tissue Engineering


M.D., Ph.D.


Oral and maxillofacial surgery, Tissue engineering

Research Interests

Oral and maxillofacial surgery, Oral care, Cartilage tissue engineering and treatment of craniofacial deformity


Japanese / English

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Major diseases and numbers of inpatients treated

Disease name Number of inpatients
1 Odontogenic infection 52
2 Oromandibular trauma 19
3 Congenital oromandibular anormalities 79
4 Jaw deformity 40
5 Temporomandibular joint disorders 2
6 Oral mucosal diseases 5
7 Benign oral cavity tumors 26
8 Malignant oral cavity tumors 23


Areas of expertise, treatment and examination methods

  1. Cleft lip and palate
  2. Jaw deformity
  3. Mandibular fractures
  4. Oral cavity tumors

Numbers of major operations and treatments performed

Name of operation/treatment Number (under general anesthesia)
1 Labioplasty/ Lip correction surgery 39
2 Palatoplasty 15
3 Cleft chin surgery 26
4 Pharyngeal flap surgery 2
5 Mandibular lengthening 2
6 Mandibular osteotomy 27
7 Benign tumor resection/ Cystectomy 35
8 Malignant tumor resection 23
9 Surgery for mandibular fractures 7
10 Impacted tooth extraction 605(including those performed under local anesthesia)


Numbers of major and specialized examinations conducted in this department

Name of examination Number
1 Mandibular function assessment 33
2 3-D maxillofacial bone model 47


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