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Keiji Moriyama

人物介绍
EMPLOYMENT RECORDS:
Clinical Fellow, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University Dental School Hospital, 1990-1992
Post-doctoral Fellow, Dept. of Medicine, Div. of Endocrinology (Prof. Gregory R. Mundy), University of Texas Health Science Center at San Antonio, School of Medicine, Department of Medicine, Division of Endocrinology, 1992-1994
Assistant Professor, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University, 1994-1997
Lecturer, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University, 1997
Professor and Chairman, Dept. of Orthodontics and Dentofacial Orthopedics, The University of Tokushima, 1998- 2007
Professor and Chairman, Section of Maxillofacial Orthognathics, Tokyo Medical and Dental University Graduate School, 2007-present
Dean, School of Dentistry, Tokyo Medical and Dental University, 2014-2017
Vice Dean, Tokyo Medical and Dental University,  Faculty of Dentistry, 2017-present
 
PROFESSIONAL AFFILIATIONS:
Executive Committee Member, World Federation of Orthodontists, 2010- present
Affiliate member, The Science Council of Japan, 2011-present
Executive Committee Member, Asian Pacific Orthodontic Society, 2013- present
President, Tokyo Orthodontic Society, 2012-2013
President, The Stomatological Society, Japan, 2014-2017
Full-member, The Edward H. Angle Society, 2017
President, Japanese Orthodontic Society, 2018 ~ present
 
CERTIFICATES AND BOARDS:
Accredited Orthodontist, Japanese Orthodontic Society, 1996
Accredited Orthodontic Instructor, Japanese Orthodontic Society, 1999
Board Certified Orthodontist, Japanese Orthodontic Society, 2008
 
HONORS AND PROFESSIONAL AWARDS:
Young Investigator Award, American Society for Bone and Mineral Research, 1993
Honorary Member, Taiwan Association of Orthodontists, 2015
 
PUBLICATIONS:
More than 170 publications in international peer-reviewed journals (1987-2019)
8 book chapters (1997-2019)

摘要
Topic: Clinical and biological considerations of maxillary transverse deficiency
 
Maxillary transverse deficiency (MTD) is defined as a transverse skeletal imbalance in the maxilla. Patients with MTD often present with a hypoplastic zygoma, wide buccal corridor, paranasal hollowing, narrow and high palate, narrow tapering maxillary arch, anterior and/or posterior dental crowding, and unilateral or bilateral crossbite. MTD is caused by acquired habits (e.g., thumb sucking, tongue thrusting, mouth breathing, obstructive sleep apnea) as well as congenital anomalies (e.g., cleft lip and palate, Treacher Collins syndrome). Patients with MTD often have associated skeletal problems not only in the transverse dimension but also in the anteroposterior and vertical dimensions.
Expansion of the mid-palatal sutures is commonly performed to correct a narrow maxillary dental arch. However, solid interdigitation of the palatal suture along with skeletal maturation in late adolescence may preclude conventional tooth-borne maxillary lateral expansion because of the limited expansion range. Fixation of bone-borne devices directly onto the palatal bone by mini-screws is now in practical use, particularly for patients in their late teens to adulthood. These devices are minimally invasive to the periodontal tissue and have less influence on the teeth than do conventional tooth-borne appliances. However, infections and loosening of the mini-screws sometimes occur. Additionally, the effect of the completely fused sutures has some limitations. Surgically assisted expansion may facilitate an increase in the transverse maxillary width, especially in adults. However, gingival recession and other complications are sometimes observed.
The bones in the craniofacial region are mostly intramembranously formed and eventually become connected to one another by sutures. A suture is defined as an articulation in which the contiguous margins of adjacent bones are united by a thin layer of fibrous tissue. Sutures also play an important role in craniofacial growth and development, providing a niche for mesenchymal stem cells of the craniofacial bones.
In this presentation, I will discuss the treatment of jaw deformities in patients with transverse maxillary deficiency by maxillary expansion and orthognathic surgery. I will also discuss the future perspectives of biological modulation of sutures to explore a new treatment strategy especially for patients with severe congenital or developmental anomalies.

人物介绍
EMPLOYMENT RECORDS:
Clinical Fellow, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University Dental School Hospital, 1990-1992
Post-doctoral Fellow, Dept. of Medicine, Div. of Endocrinology (Prof. Gregory R. Mundy), University of Texas Health Science Center at San Antonio, School of Medicine, Department of Medicine, Division of Endocrinology, 1992-1994
Assistant Professor, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University, 1994-1997
Lecturer, 2nd. Dept. of Orthodontics, Tokyo Medical and Dental University, 1997
Professor and Chairman, Dept. of Orthodontics and Dentofacial Orthopedics, The University of Tokushima, 1998- 2007
Professor and Chairman, Section of Maxillofacial Orthognathics, Tokyo Medical and Dental University Graduate School, 2007-present
Dean, School of Dentistry, Tokyo Medical and Dental University, 2014-2017
Vice Dean, Tokyo Medical and Dental University,  Faculty of Dentistry, 2017-present
 
PROFESSIONAL AFFILIATIONS:
Executive Committee Member, World Federation of Orthodontists, 2010- present
Affiliate member, The Science Council of Japan, 2011-present
Executive Committee Member, Asian Pacific Orthodontic Society, 2013- present
President, Tokyo Orthodontic Society, 2012-2013
President, The Stomatological Society, Japan, 2014-2017
Full-member, The Edward H. Angle Society, 2017
President, Japanese Orthodontic Society, 2018 ~ present
 
CERTIFICATES AND BOARDS:
Accredited Orthodontist, Japanese Orthodontic Society, 1996
Accredited Orthodontic Instructor, Japanese Orthodontic Society, 1999
Board Certified Orthodontist, Japanese Orthodontic Society, 2008
 
HONORS AND PROFESSIONAL AWARDS:
Young Investigator Award, American Society for Bone and Mineral Research, 1993
Honorary Member, Taiwan Association of Orthodontists, 2015
 
PUBLICATIONS:
More than 170 publications in international peer-reviewed journals (1987-2019)
8 book chapters (1997-2019)

摘要
Topic: Clinical and biological considerations of maxillary transverse deficiency
 
Maxillary transverse deficiency (MTD) is defined as a transverse skeletal imbalance in the maxilla. Patients with MTD often present with a hypoplastic zygoma, wide buccal corridor, paranasal hollowing, narrow and high palate, narrow tapering maxillary arch, anterior and/or posterior dental crowding, and unilateral or bilateral crossbite. MTD is caused by acquired habits (e.g., thumb sucking, tongue thrusting, mouth breathing, obstructive sleep apnea) as well as congenital anomalies (e.g., cleft lip and palate, Treacher Collins syndrome). Patients with MTD often have associated skeletal problems not only in the transverse dimension but also in the anteroposterior and vertical dimensions.
Expansion of the mid-palatal sutures is commonly performed to correct a narrow maxillary dental arch. However, solid interdigitation of the palatal suture along with skeletal maturation in late adolescence may preclude conventional tooth-borne maxillary lateral expansion because of the limited expansion range. Fixation of bone-borne devices directly onto the palatal bone by mini-screws is now in practical use, particularly for patients in their late teens to adulthood. These devices are minimally invasive to the periodontal tissue and have less influence on the teeth than do conventional tooth-borne appliances. However, infections and loosening of the mini-screws sometimes occur. Additionally, the effect of the completely fused sutures has some limitations. Surgically assisted expansion may facilitate an increase in the transverse maxillary width, especially in adults. However, gingival recession and other complications are sometimes observed.
The bones in the craniofacial region are mostly intramembranously formed and eventually become connected to one another by sutures. A suture is defined as an articulation in which the contiguous margins of adjacent bones are united by a thin layer of fibrous tissue. Sutures also play an important role in craniofacial growth and development, providing a niche for mesenchymal stem cells of the craniofacial bones.
In this presentation, I will discuss the treatment of jaw deformities in patients with transverse maxillary deficiency by maxillary expansion and orthognathic surgery. I will also discuss the future perspectives of biological modulation of sutures to explore a new treatment strategy especially for patients with severe congenital or developmental anomalies.

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