Centers & Services

Department of Orthodontics

What is Orthodontics?

Our aim is to obtain optimal occlusion and stable oral functions by moving teeth and to attain a balanced, beautiful face by performing surgical procedures and by controlling the growth of the bones of the jaw and face, and teeth.

Our dentists

Director, Orthodontic Dentistry Department

Hiroshi Kamioka, Professor and Chair
[Orthodontic treatment, Craniofacial Anomalies, Jaw deformity, Invisible orthodontic treatment, and Orthodontic treatment with miniscrews]


Noriaki Kawanabe Associate
[Orthodontic treatment, Jaw deformity, Craniofacial Anomalies, Orthodontic treatment with miniscrews]
Yoshihito Ishihara Lecturer [Orthodontic treatment, Orthodontic treatment with miniscrews, Jaw deformity, Invisible orthodontic treatment]
Hiroki Ueda Assistant
[Orthodontic treatment, Invisible orthodontic treatment Orthodontic treatment with miniscrews]
Satoru Hayano Assistant
[Orthodontic treatment, Invisible orthodontic treatment Orthodontic treatment with miniscrews]
Mitsuhiro Hoshijima Assistant
[Orthodontic treatment, Orthodontic treatment with miniscrews, Jaw deformity, Invisible orthodontic treatment]
Masahiro Nakamura Assistant
[Orthodontic treatment, Jaw deformity, Invisible orthodontic treatment, Orthodontic treatment with miniscrews]
Kana Kono Assistant
[Orthodontic treatment, Invisible orthodontic treatment Orthodontic treatment with miniscrews]

*Specialty shown in [ ]

Outpatient hours: by advance appointment only

  Monday Tuesday Wednesday Thursday Friday
Morning (9:00-12:00)
Afternoon (13:00-17:00)

◎ Double circles signify that outpatient hours are 13:00-19:00.

Dentists for first-visiting outpatients: first-visiting outpatients can be accepted as needed from 8:30 to 11:30.

  Monday Tuesday Wednesday Thursday Friday
Attending dentists Kamioka/ Hoshijima Kawanabe/ Nakamura Kamioka/ Kono Kawanabe/ Ueda Ishihara/ Hayano

Treatment system

Taking advantage of the university hospital’s characteristics, we provide comprehensive treatments in cooperation with different medical departments such as oral surgery, plastic surgery, neurosurgery and pediatrics, as well as dental departments such as operative dentistry, preventive dentistry, pediatric dentistry, and prosthesis.

Treatment policy

After detailed analyses of examination results, a science-based diagnosis is established through discussion by several specialists including the department director. In many cases, we offer not a single treatment plan but multiple options considering each patient’s complaints and ask the patient to select the optimal treatment depending on the patient’s condition.

Scope of Target diseases

Orthodontic dentistry targets crowding (crowded teeth), maxillary prognathism (project teeth), mandibular prognathism (negative overjet), deep overbite, open bite (by which upper teeth and lower teeth cannot be clenched), spaced arch (a gap separated teeth). Now, most treatments are paid at a patient’s own expense (not covered by insurance), with the exception of bad alignment of teeth attributable to jaw deformity (requiring jaw surgery) and the following diseases, which are covered by health insurance: Cleft lip and palate ・ Goldenhar syndrome (branchial arch syndrome) ・ Cleidocranial dysplasia ・ Crouzon syndrome ・ Treacher--Collins syndrome ・ Pierre Robin syndrome ・ Down syndrome ・ Russell--Silver syndrome ・ Turner syndrome ・ Beckwith--Wiedmann syndrome ・ Apert syndrome ・ Parry-Romberg syndrome ・ Nemaline myopathy ・ Hemifacial hypertrophy ・ Ellis -- van Creveld syndrome ・ Achondroplasia ・ Ectodermal dysplasia ・ Neurofibromatosis ・ Gorlin syndrome ・ Noonan syndrome ・ Marfan syndrome ・ Prader--Willi syndrome ・ Prosoposchisis ・ Muscular dystrophy ・ Osteopetrosis ・ Incontinentia pigmenti ・ Oral--facial-digital syndrome ・ Mobius syndrome ・ Kabuki syndrome ・ Kloppel--Trenaunay--Weber syndrome ・ Williams syndrome ・ Binder syndrome ・ Stickler syndrome ・ Microglossia, ・ Craniosynostosis ・ Dysosteogenesis ・ Whistling-face syndrome ・ Rubinstein--Taybi syndrome ・Chromosomal deficiency syndrome ・ Larsen syndrome, ・ Pycnodysostosis ・ Oligodontia (non-syndromic partial anodontia of six or more teeth) ・ CHARGE syndrome ・ Marshall syndrome ・ Pituitary nanism ・ XXY syndrome (Klinefelter’s syndrome) ・ Chromosome 18 ring syndrome

Okayama University Hospital has examined cases from multiple viewpoints and has performed joint surgeries since it established the Okayama Craniofacial Center (OCFC) in 2009, and the Advanced Cleft Lip and Cleft Palate Center in 2015.

Description of medical care

We provide treatments to correct teeth alignment and occlusion. Recently, to meet patients’ increasingly treatment needs, we have used orthotic appliances for patients who want to receive orthodontic treatments without notice by others or orthotic appliances with weaker corrective force or with softer materials for patients who are particularly susceptible to pain.
In addition to common orthodontic treatments not covered by health insurance programs, we also provide treatments covered by health insurance programs for patients with malocclusion and jaw deformity attributable to craniofacial anomalies, cleft lip and palate, and syndromes.

Payment system

  • Treatments not covered by health insurance
    Fees vary depending on what is treated and how long it takes. (When consumption tax is changed, for example, they can also be changed irregularly.)
    Overall orthodontic treatment: about ¥750,000 and more
    Partial orthodontic treatment: about ¥300,000 and more
    Pre-prosthetic treatment: about ¥150,000 and more
  • Treatments covered by health insurance
    The self-pay ratio in treatment cost is 30%. In patients with disorders in vocalization, speech, and masticatory function caused by cleft lip and palate, when their disorders are regarded as cured or relieved by orthodontic treatments, the treatment cost can be paid by independent support (growing/rehabilitation) medical benefits. Then, the self-pay ratio is 10% in principle, but it is limited by a ceiling depending on household income. For more information, please contact us.

Main methods for examination and explanation

  • General examinations: photographs of face and mouth, denture molds, and x-ray photographs necessary for diagnosis
  • Jaw function examinations: to check jaw movement and the active state of muscles. In addition, when pain of jaw joints or noise is detected, additional tests can be performed.
  • Diagnosis: The present state and future treatment are explained based on diagnostic results. We value the practices of evidence-based medicine (EBM) and informed consent.
  • Wearing orthotic appliances: orthotic appliances are individualized for each patient.
  • Treatments: treatment for tooth movement and jaw growth control are performed, requiring the patient to visit the office approximately once a month.
  • Retention: after refined teeth alignment and occlusion are completed, the devices are removed and the teeth are held for a certain period. The process is called retention, which is the last and most important stage in a series of orthodontic treatments.