Search

Your search keyword '"Akitoshi Kawamata"' showing total 5 results
Start Over Author "Akitoshi Kawamata" Topic dentistry
5 results on '"Akitoshi Kawamata"'

1. Abstracts—Dental radiology vol. 41, 2001

Author

Eiichiro Ariji, Yoshiko Ariji, Shigemitsu Sakuma, Yasuo Kimura, Takenori Noikura, Motoo Kitano, Chiho Yamashita, Daigo Satoh, Takashi Yosue, Ayumi Hinoki, Fukiko Kobayashi, Jusuke Ito, Takafumi Hayashi, Takashi Saku, Taira Shuhzo, Imai Nobuyuki, Ritsuo Takagi, Mizue Ida, Tohru Kurabayashi, Norio Yoshino, Akemi Tetumura, Eiichi Honda, Naoto Ohbayashi, Takehito Sasaki, Shoji Enomoto, Teruo Amagasa, Kouji Katsura, Shuhzou Taira, Syunichi Nakajima, Masao Yuasa, Kaoru Kobayashi, Akira Yamamoto, Takamichi Otonari, Chinami Igarashi, Masahiro Imanaka, Satsuki Wakae, Katsuyuki Yamamoto, Akira Mishima, Yumi Kimura, Mamoru Tanaka, Ken Tamazawa, Kaoru Lee, Minoru Fujita, Shin-ichi Tomita, Yoshihiko Furuki, Yoshikazu Suei, Akira Taguchi, Keiji Tanimoto, Yukinori Kimura, Kazuyuki Araki, Tomomi Hanasawa, Kumi Sakamaki, Tomohiro Okano, Rei Tanaka, Jun-ichi Koyama, Noriko Masuko, Masakazu Gotoh, and Akitoshi Kawamata

Subjects
business.industry, Dental radiology, Oral and maxillofacial surgery, Medicine, Dentistry, Radiology, Nuclear Medicine and imaging, Dentistry (miscellaneous), business
Published
2002
Full Text
View/download PDF

2. Three-dimensional computed tomographic evaluation of morphologic airway changes after mandibular setback osteotomy for prognathism

Author

Masami Fujishita, Akitoshi Kawamata, Yoshiko Ariji, and Eiichiro Ariji

Subjects
Adult, Male, Adolescent, Cephalometry, medicine.medical_treatment, Dentistry, Mandible, Osteotomy, stomatognathic system, Image Processing, Computer-Assisted, Maxilla, medicine, Humans, Prognathism, Reduction (orthopedic surgery), Orthodontics, Osteosynthesis, business.industry, Pharynx, Hyoid bone, Hyoid Bone, General Medicine, medicine.disease, medicine.anatomical_structure, Female, Tomography, X-Ray Computed, business, Airway, Follow-Up Studies
Abstract

Objective. To observe changes in the pharyngeal airway and the hyoid bone position after mandibular setback osteotomy in 30 patients with mandibular prognathism by means of 3-dimensional computed tomography (3DCT). Study design. Preoperative and postoperative computed tomography (CT) examinations were performed on 17 patients treated by sagittal split ramus osteotomy with rigid osteosynthesis and on 13 patients treated by intraoral vertical ramus osteotomy without osteosynthesis. The amount of mandibular setback was measured by the preoperative to postoperative difference of the mandibular position in axial CT images. The sizes of the preoperative and postoperative pharyngeal airway were evaluated from semitransparent and crosscut 3DCT images. Postoperative displacement of the hyoid bone was evaluated by a technique to superimpose a postoperative hard tissue 3DCT image on the preoperative image. The helical scan technique was used in the CT examination. The volume rendering technique was used to create 3DCT images. Results. The mean mandibular setback was 7.8 ± 2.1 mm with a range of 5 to 11 mm. Three months after surgery, the lateral and frontal widths of the pharyngeal airway had decreased significantly in comparison with the preoperative width. The mean reduction rates of the lateral and frontal width were 23.6% and 11.4%, respectively. The diminished airway did not recover by either 6 months or 1 year after surgery in most cases. Downward and posterior displacement of the hyoid bone was seen postoperatively. There were positive correlations between the amount of mandibular setback and reduction of the lateral width of the pharyngeal airway (r = 0.54) and the amount of hyoid bone displacement (r = 0.42). There were no significant differences between the two surgical techniques. Conclusion. Three-dimensional computed tomography was a practical imaging technique to evaluate the morphologic airway changes. The pharyngeal airway may have irreversible narrowing after mandibular setback surgery. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000;89:278-87)

Published
2000
Full Text
View/download PDF

3. Abstracts—Dental radiology Vol.38, 1998

Author

Tomokazu Fujiki, Toru Wakasa, Yoshinobu Yanagi, Yasutoshi Honda, Noriko Kawai, Kanji Kishi, Takurou Wada, Yasuhiko Morita, Takashi Hiraoka, Tuyoshi Sato, Takenori Noikura, Yoshihiko Hayakawa, Hitoshi Shibuya, Toshimichi Mori, Mamoru Wakoh, Yoshiko Ota, Kinya Kuroyanagi, Naoya Kakimoto, Shumei Murakami, Atsutosi Nakatani, Souhei Furukawa, Hajime Fuchihata, Ken'ichi Obinata, Tsuyoshi Sawamura, Masanori Kaneko, Keiichi Ohmori, Motoyasu Nakamura, Hidemichi Yuasa, Shinji Okumura, Akiko Hirukawa, Ayae Matsuo, Toshimitsu Todokoro, Munetaka Naitoh, Eiichiro Ariji, Takashi Nakamura, Masahiro Izumi, Maya Sakamoto, Shuichi Higano, Shoki Takahashi, Noriko Kurihara, Takashi Sasano, Masao Yuasa, Kaoru Kobayashi, Chinami Igarashi, Masahiro Imanaka, Akira Yamamoto, Kazuya Honda, Masahiro Ueno, Masao Araki, Kazuo Iwai, Koji Hashimoto, Koji Shinoda, Hiromi Kitagawa, Takuya Harada, Masayuki Yamada, Satoshi Hirose, Kiwako Yamamoto, Chikara Saitou, Hiromasa Nikai, Yosuke Suzuki, Akira Yoshida, Shiro Yasaki, Kimiyo Ichinosawa, Ken-ichiro Ejima, Yoshinori Arai, Takashi Maruyama, Kanae Nishizawa, Akitoshi Kawamata, Masami Fujishita, Youichirou Iwashita, Shigeaki Suenaga, Takuro Taniguchi, Mutsumasa Takahashi, Toshirou Kondoh, Eiichi Honda, Norio Yoshino, Takehito Sasaki, Satoru Shoji, Yoshiyuki Shirakura, Masanori Shozushima, Kimio Sakamaki, Yasuyuki Shimizu, Yoshiko Ariji, Tsuneichi Okano, Osamu Matsui, Jin-ichi Takahashi, Hiroto Iida, Jiro Hasegawa, and Akira Senda

Subjects
Cobalt chromium alloy, medicine.anatomical_structure, Intraoral radiography, Mandibular fossa, Dental radiology, business.industry, Oral and maxillofacial surgery, medicine, Dentistry, Radiology, Nuclear Medicine and imaging, Dentistry (miscellaneous), business
Published
1999
Full Text
View/download PDF

4. Abstracts—dental radiology vol. 36, 1996

Author

Nobuhiro Konishi, Tohru Kurabayashi, Akiko Tanaka, Mizue Ida, Naoto Ohbayashi, Norio Yoshino, Takehito Sasaki, Jun-ichi Ishii, Takashi Fujibayashi, Yukiko Matsuda, Manabu Shionome, Kenji Seki, Kohji Hasegawa, Tomohiro Okano, Yuka Uchiyama, Shumei Murakami, Hajime Inoue, Souhei Furukawa, Hajime Fuchihata, Kazuya Honda, Masao Araki, Yasue Kawabe, Ken-ichiro Ejima, Shinkichi Iwanari, Kazuo Iwai, Koji Hashimoto, Koji Shinoda, Masahiko Ohtsuka, Hiroomi Sumida, Yumiko Yamane, Hiromoto Utsumi, Tohru Nakamura, Tadashi Sunayashiki, Takuro Wada, Keijl Tanimoto, Fukiko Kobayashi, Takeshi Matsushita, Takafumi Hayashi, Jusuke Ito, Kousuke Nishimura, Yasuo Shirose, Joji Yoneda, Kouki Oka, Isamu Kashima, Minori Nojiri, Akitoshi Kawamata, Takashi Wakisaka, Masato Matsuoka, Michiyo Nagaya, Yuji Yasui, Masami Fujishita, Masahiko Isogai, Tomomi Hanazawa, Yukinori Kimura, Reiko Hachisu, Tsukasa Sano, Masao Nagumo, Ichiro Semba, Eiji Shimada, Masahiro Ueno, Kunihiko Sawada, Shoji Kawashima, Tokunori Kato, Hitoshi Nakayama, Shunichi Nakajima, Ryuich Munakata, Motoyasu Nakamura, Keiichi Uchida, Naomichi Mase, Tsunekatsu Fukazawa, Yukari Wada, Katashi Osanal, Toshio Misaki, Chinami Igarashi, Kaoru Kobayashi, Masahiro Imanaka, Masao Yuasa, Takeshi Komahashi, Akira Yamamoto, Tatsumi Hiromatsu, Yasuhiro Morimoto, Yoshiko Nagata, Akemi Uchida, Yuji Shinohara, and Takeshi Ohba

Subjects
business.industry, Dental radiology, Oral and maxillofacial surgery, Medicine, Dentistry, Radiology, Nuclear Medicine and imaging, Dentistry (miscellaneous), business
Published
1997
Full Text
View/download PDF

5. Three-dimensional computed tomography evaluation of postsurgical condylar displacement after mandibular osteotomy

Author

Robert P Langlais, Kuniteru Nagahara, Akitoshi Kawamata, Nobutake Kanematu, Masami Fujishita, and Kin-ichiro Niwa

Subjects
Adult, Male, Adolescent, Rotation, medicine.medical_treatment, Movement, Dentistry, Pilot Projects, Mandible, Osteotomy, Condyle, Orthodontics, Corrective, stomatognathic system, Bone plate, Image Processing, Computer-Assisted, Medicine, Humans, Displacement (orthopedic surgery), General Dentistry, Osteosynthesis, Temporomandibular Joint, business.industry, Mandibular Condyle, musculoskeletal system, Temporomandibular joint, medicine.anatomical_structure, Otorhinolaryngology, Evaluation Studies as Topic, Prognathism, Surgery, Female, Tomography, Oral Surgery, business, Tomography, X-Ray Computed, Bone Plates, Follow-Up Studies
Abstract

Objective. The purpose of this study was to examine both condylar displacement of the temporomandibular joint after sagittal split ramus osteotomy with rigid osteosynthesis and intraoral vertical ramus osteotomy without osteosynthesis in patients with mandibular prognathism by means of three-dimensional computed tomography. Study design. In this pilot study, five patients treated with sagittal split ramus osteotomy and 5 patients treated with intraoral vertical ramus osteotomy were evaluated. A technique to superimpose a postoperative three-dimensional computed tomography image on its corresponding preoperative image was designed. Postoperative condylar displacement, rotation, and tilting were measured in three-dimensional computed tomography images. Results. Within 3 to 6 months after surgery, changes in the inclination of the condylar axes were distinctly seen, although changes in the position of the condyles within the joints were minimal. In particular, outward rotation of the condylar long axes after intraoral vertical ramus osteotomy was a frequent finding. Conclusions. The three-dimensional computed tomography superimposition technique was a practical method of evaluating post-surgical condylar displacement after mandibular osteotomy.

Published
1998

Catalog

Books, media, physical & digital resources
See catalog results