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8 results on '"Tatsuya Akizuki"'

1. Influence of the bone graft materials used for guided bone regeneration on subsequent peri-implant inflammation: an experimental ligature-induced peri-implantitis model in Beagle dogs

Author

Ryo Sato, Takanori Matsuura, Tatsuya Akizuki, Shunsuke Fukuba, Munehiro Okada, Kohei Nohara, Shunsuke Takeuchi, Shu Hoshi, Wataru Ono, Kiichi Maruyama, Yuichi Izumi, and Takanori Iwata

Subjects
Guided bone regeneration, Peri-implantitis, Autograft, Deproteinized bovine bone mineral, Animal study, Medicine, Dentistry, RK1-715
Abstract

Abstract Purpose We aimed to histologically evaluate the influence of bone materials used during guided bone regeneration (GBR) on subsequent peri-implantitis in an experimental ligature-induced peri-implantitis model in beagle dogs. Methods Bilateral mandibular premolars (PM2-4) were extracted from six beagle dogs. After 3 months, standardized bone defects (3 mm [mesio-distal width] × 2 mm [bucco-lingual width] × 3 mm [depth]) were created in the experimental group, with simultaneous dental implant placement at the center of the defects. The defects were randomly filled with either autograft (AG) or deproteinized bovine bone mineral (DBBM) and covered with a collagen membrane. In the control group, implant fixtures were placed without creating an intrabony defect. After 3 months, a healing abutment was placed. Four weeks later, a 3–0 silk thread was ligated around the implants to induce peri-implantitis. After 4 weeks, the specimens were dissected and histologically examined. Results There were no clinical findings of inflammation until silk thread ligation. Four weeks after the onset of peri-implantitis, gingival redness and swelling were seen with mild resorption of the peri-implant bone on dental radiographs. There were no significant differences between the AG, DBBM, and control groups for the following parameters: bone-to-implant contact, distance from the implant shoulder to the base of the bone defect, area of bone defect, and area of new bone. Conclusions Within the limitations of this study, it can be concluded that peri-implant tissues after GBR using AG and DBBM underwent the same degree of bone resorption by peri-implantitis as the no defect group.

Published
2022
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2. Current Status of Clinical Practice of Periodontal Therapy by Predoctoral Dental Students at Tokyo Medical and Dental University (TMDU)

Author

Takanori Iwata, Shogo Maekawa, Tatsuya Akizuki, Akira Aoki, Kazuki Watanabe, Shigeru Oda, Yasuo Takeuchi, Toru Nikaido, Arata Ebihara, Koji Mizutani, Sayaka Katagiri, Yuichi Izumi, Kouji Araki, Yuichi Ikeda, and Masayuki Hideshima

Subjects
Clinical Practice, medicine.medical_specialty, business.industry, Family medicine, Medicine, Current (fluid), business
Published
2020

4. In vitro and clinical evaluation of optical coherence tomography for the detection of subgingival calculus and root cementum

Author

Geena Koshy, Tatsuya Akizuki, Kenichiro Ejiri, Sho Kakizaki, Akira Aoki, Masaki Tsubokawa, Yoichi Taniguchi, Shigeru Oda, Yuichi Izumi, Yasunori Sumi, and Koji Mizutani

Subjects
genetic structures, education, Dentistry, 01 natural sciences, 010309 optics, 03 medical and health sciences, 0302 clinical medicine, Scaling and root planing, stomatognathic system, Optical coherence tomography, 0103 physical sciences, medicine, Premolar, Cementum, General Dentistry, Periodontitis, medicine.diagnostic_test, business.industry, Calculus (dental), Subgingival calculus, 030206 dentistry, medicine.disease, stomatognathic diseases, medicine.anatomical_structure, sense organs, business, Clinical evaluation
Abstract

This study evaluated the effectiveness of swept-source optical coherence tomography (ss-OCT) for detecting calculus and root cementum during periodontal therapy. Optical coherence tomography (OCT) images were taken before and after removal of subgingival calculus from extracted teeth and compared with non-decalcified histological sections. Porcine gingival sheets of various thicknesses were applied to the root surfaces of extracted teeth with calculus and OCT images were taken. OCT images were also taken before and after scaling and root planing (SRP) in human patients. In vitro, calculus was clearly detected as a white-gray amorphous structure on the root surface, which disappeared after removal. Cementum was identified as a thin, dark-gray layer. The calculus could not be clearly observed when soft tissues were present on the root surface. Clinically, supragingival calculus and cementum could be detected clearly with OCT, and subgingival calculus in the buccal cervical area of the anterior and premolar teeth was identified, which disappeared after SRP. Digital processing of the original OCT images was useful for clarifying the calculus. In conclusion, ss-OCT showed potential as a periodontal diagnostic tool for detecting cementum and subgingival calculus, although the practical applications of subgingival imaging remain limited.

Published
2018

6. In vitro and clinical evaluation of optical coherence tomography for the detection of subgingival calculus and root cementum

Author

Masaki, Tsubokawa, Akira, Aoki, Sho, Kakizaki, Yoichi, Taniguchi, Kenichiro, Ejiri, Koji, Mizutani, Geena, Koshy, Tatsuya, Akizuki, Shigeru, Oda, Yasunori, Sumi, and Yuichi, Izumi

Subjects
Dental Cementum, Swine, Image Interpretation, Computer-Assisted, Gingiva, Animals, Dental Scaling, Humans, Dental Calculus, In Vitro Techniques, Tooth Root, Tomography, Optical Coherence, Root Planing
Abstract

This study evaluated the effectiveness of swept-source optical coherence tomography (ss-OCT) for detecting calculus and root cementum during periodontal therapy. Optical coherence tomography (OCT) images were taken before and after removal of subgingival calculus from extracted teeth and compared with non-decalcified histological sections. Porcine gingival sheets of various thicknesses were applied to the root surfaces of extracted teeth with calculus and OCT images were taken. OCT images were also taken before and after scaling and root planing (SRP) in human patients. In vitro, calculus was clearly detected as a white-gray amorphous structure on the root surface, which disappeared after removal. Cementum was identified as a thin, dark-gray layer. The calculus could not be clearly observed when soft tissues were present on the root surface. Clinically, supragingival calculus and cementum could be detected clearly with OCT, and subgingival calculus in the buccal cervical area of the anterior and premolar teeth was identified, which disappeared after SRP. Digital processing of the original OCT images was useful for clarifying the calculus. In conclusion, ss-OCT showed potential as a periodontal diagnostic tool for detecting cementum and subgingival calculus, although the practical applications of subgingival imaging remain limited.

Published
2018

7. Anti-inflammatory effect of curcumin in periodontitis

Author

Masato Minabe and Tatsuya Akizuki

Subjects
Periodontitis, chemistry.chemical_compound, chemistry, medicine.drug_class, business.industry, medicine, Curcumin, Pharmacology, medicine.disease, business, Anti-inflammatory
Published
2015

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