Centers & Services

Department of Oral and Maxillofacial Reconstructive Surgery

What is oral and maxillofacial reconstructive surgery?

We treat various diseases occurred in oral and maxillofacial region. Our department in particular takes charge of development and practice of advanced therapies for congenital disease and developmental disorder of jaws , which includes cleft lip and/ or palate and jaw deformities.

Our Physicians

Director, Department of Oral and Maxillofacial Reconstructive Surgery

Seiji Iida, Professor
[Oral surgery]


Nobuyoshi Mizukawa Lecturer [Oral surgery]
Eiki Yamachika Lecturer [Oral surgery]
Tatsushi Matsumura Lecturer [Oral surgery]
Norifumi Moritani Assistant professor [Oral surgery]
Naoki Nakata Assistant professor [Oral surgery]
Masakazu Matsubara Assistant professor [Oral surgery]

*Specialty shown in [ ]

Weekly schedule of outpatient physicians

  Monday Tuesday Wednesday Thursday Friday
Morning First visit
Nobuyoshi Mizukawa (Lecturer)
Eiki Yamachika (Lecturer)
Revisit with appointment
Revisit with appointment First visit
Seiji Iida (Professor)
Norifumi Moritani (Lecturer)
Revisit with appointment
Revisit with appointment First visit
Tatsushi Matsumura (Lecturer)
(First and third Friday of each month)
Revisit with appointment
Afternoon Revisit with appointment Special outpatients
(cleft lip and palate and jaw deformity)
Revisit with appointment Special outpatients
(cleft lip and palate)
Revisit with appointment Special outpatients
(dental implant and oral tumor and jaw deformity)
Revisit with appointment Revisit with appointment

Treatment system

Seven Medical Specialists (including 5 Advising Doctors) of the Japanese Society of Oral and Maxillofacial Surgeons are mainly in charge of medical examination. Prospective patients carrying a letter of introduction can make a first visit at any time, even if it is not the designated day of the week. A group dedicated to each disease takes charge of special outpatients on Monday and Wednesday afternoons.

Treatment policies

The mouth is an organ that conducts various important motions such as eating and articulation,respiration. Our department conducts treatment for various diseases that affect tissues around the mouth for sustainment and recovery of its functions. Particularly, cleft lip and cleft palate are conditions that require various therapies along with a patient's development, from birth to adulthood. Our treatment goal is not limited to aesthetic improvement, but to acquisition and maintenance of speech, occlusion, and masticatory functions.
As for treatment of oral malignant tumors, we take charge of the field of maxillary reconstruction as a core member of the Head and Neck Cancer Center, Okayama University Hospital, and management and functional recovery of oral environment, in addition to therapy as oral surgery.


  • CLEFT LIP AND PALATE: Various surgical therapies are used for cleft lip and cleft palate patients: cheiloplasty, palatoplasty, secondly repairmen of nose and lip, alveolar bone grafting and orthognathic surgery.
  • JAW DEFORMITY: Reconstructive surgery including bone lengthening and therapy for jaw deformity
  • DENTAL IMPLANTS: Bone augmentation such as sinus lift and veneer graft, and implants after jaw reconstruction

Scope of Target diseases

  • Oral and maxillofacial congenital diseases: Diseases with oro-facial anomaly, such as cleft lip and/or cleft palate, hemifacial microsomia and other syndromic disease, Disease causing dysarthria, such as congenital velopharyngeal insufficiency, and various speech disorders.
  • Jaw deformity: Prognathism, Retrognathism, Facial asymmetry, micrognathism with sleep disorders.
  • Temporomandibular joint disorder
  • Maxillofacial injuries: Facial bone fractures, alveolar bone fracture, soft tissue injuries
  • Oral tumors: Odontogenic tumor, nonodontogenic tumor , malignant tumor of oral cavity
  • Cystic lesion of jaws
  • Maxillofacial inflammation due to dental lesion, including impacted wisdom teeth
  • Alveolar bone defects after teeth extraction, injury or oral tumor resection

Description of Medical care

  • Therapy of cleft lip and cleft palate is not limited to closing of a cleft observed at birth. It is ideal that appropriate therapies be conducted at appropriate stages, corresponding to the morphological change of the lip, soft palate, teeth alignment, and jawbone according to the growth, and the functional alteration accompanying thereof. . We start treatment from immediately after birth, a consultation with parents and a treatment using Hotz's plate for feeding improvement and growth control of the upper jaw. Our surgical treatments conduct consistent therapy including primary and secondary therapies through adulthood. The aim of our treatments is not only the improvement of aesthetic problems, but also acquisition and maintenance of oral functions such as speech function, occlusion, and digestion.
  • The prognosis of dental implant therapy, which is performed to correct the missing teeth from various causes is influenced greatly by the shape of the alveolar bones. We conduct therapy to resolve morphological problems of alveolar bones using methods such as bone grafting and sinus lift (maxillary sinus floor augmentation) to achieve a more stable implant prognosis.
  • Face injuries by road traffic accidents and sports often produce accompanying mouth injuries including teeth dislocation as well as facial bone fractures. Appropriate reduction and fixation are executed to these injuries, to prevent generation of physical impediment of oral functions such as malocclusion. Furthermore, appropriate reconstruction therapy are performed for functional disorder remained by previous injury. Therefore, we ultimately aim at the acquisition of good jaw shape and oral functions.
  • Bone lengthening

    Hotz's plate
    Hotz's plate

    Our department administers various bone lengthening therapies not only for congenital diseases such as cleft lip and palate but for impaired development and shape disorder of a jawbone that can occur from growth or injury. Particularly, we offer the partial elongation of the anterior maxilla to cleft lip and palate diseases, which is an outstanding therapy to preserve speech function and to improve teeth alignment.

Highly advanced/special medical treatments

Techniques covered by health insurance programs

  • Jawbone elongation to the dysplasia and abnormal growth of the maxillofacial bone
  • Implant denture (dental implant treatment for reconstruction of occlusion function after oral surgery)

Techniques performed as medical treatments at a patient’s own expense

  • Dental implant treatment
  • Bone augmentation with respect to dental implant treatment (bone grafting and bone lengthening)
  • Oral surgery treatment related to orthodontic therapies (implant anchor and corticotomy)

Main Methods for Testing and Explanation

Implant placement simulation is performed using three-dimensional images constructed from CT images.
Surgery simulation is performed using an entity model prepared from CT images.
Velopharyngeal functions are diagnosed using rhinopharynx endoscopy and nasometer tests.
Geometry measurement of soft and hard tissues is performed using laser scanning, CT and MRI images, and pre/postoperative shape evaluation is conducted of various maxillofacial operations.