研究者詳細 - 柳　文修

論文 - 柳　文修

分割表示 96 件中 41 - 60 件目／全件表示 >>

Diagnostic value of MRI for odontogenic tumours 査読

M. Fujita, H. Matsuzaki, Y. Yanagi, M. Hara, N. Katase, M. Hisatomi, T. Unetsubo, H. Konouchi, H. Nagatsuka, J. I. Asaumi

Dentomaxillofacial Radiology 42 ( 5 ) 2013年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

Objectives: To evaluate the diagnostic value of MRI for odontogenic tumours. Materials and methods: 51 patients with odontogenic tumours were subjected to preoperative MRI examinations. For tumours with liquid components, i.e. ameloblastomas and keratocystic odontogenic tumours (KCOTs), the signal intensity (SI) uniformity of their cystic components (US) was calculated and then their US values were compared. For tumours with solid components that had been examined using dynamic contrast-enhanced MRI (DCEMRI), their CI (maximum contrast index), Tmax (the time when CI occurred), CI (CI ×0.90), Tpeak (the time when CI occurred) and CI (i.e. the CI observed at 300 s after contrast medium injection) values were determined from CI curves. We then classified the odontogenic tumours according to their DCE-MRI parameters. Results: Significant differences between the US values of the ameloblastomas and KCOT were observed on T weighted images, T weighted images and short TI inversion recovery images. Depending on their DCE-MRI parameters, we classified the odontogenic tumours into the following five types: Type A, CI > 2.0 and T < 200 s; Type B, CI < 2.0 and T < 200 s; Type C, CI > 2.0 and T < 600 s; Type D, CI > 2.0 and T > 600 s; Type E, CI < 2.0 and T > 600 s. Conclusion: Cystic component SI uniformity was found to be useful for differentiating between ameloblastomas and KCOT. However, the DCE-MRI parameters of odontogenic tumours, except for odontogenic fibromas and odontogenic myxomas, contributed little to their differential diagnosis. © 2013 The British Institute of Radiology. max max peak max peak 300 1 2 peak peak peak peak 300 max 300 max 300 max

DOI： 10.1259/dmfr.20120265

Clinical application of three -dimensional cone beam computed tomography in orthodontics

Kiyoshi Tai, Yoshinobu Yanagi, Jae Hyun Park, Jun Ichi Asaumi

Computed Tomography: New Research 255 - 266 2013年3月

掲載種別：論文集(書籍)内論文

Cone-beam computed tomography (CBCT) is a useful armamentarium for the accurate assessment of orthodontic patients. Traditionally, the diagnosis and treatment planning of the orthodontic patients have used two-dimensional (2D) radiographs. The clinical value of CBCT lies from its ability to describe craniofacial anatomy accurately and provide comprehensive information about anatomical relationships for the improved diagnosis, treatment planning and prediction of treatment. CBCT has been found to be useful in assessing cases of dental and craniofacial anomalies, jaw deformities, airway disruptions, temporomandibular joint (TMJ) disorders, as well as placement of temporary skeletal anchorage devices (TSADs) and other applications. In this chapter, we will describe the clinical application of CBCT in orthodontics. © 2013 Nova Science Publishers, Inc. All rights reserved.

Case series: conditions inhibiting eruption of permanent first molars. 査読

Hidenobu Matsuzaki, Yoshinobu Yanagi, Naoki Katase, Hitoshi Nagatsuka, Marina Hara, Masakazu Ashida, Teruhisa Unetsubo, Akiko Sato, Mariko Fujita, Toshihiko Takenobu, Jun-ichi Asaumi

Pediatric Dentistry 35 ( 1 ) 67 - 70 2013年1月

In vitro assessment of factors affecting the apparent diffusion coefficient of Jurkat cells using bio-phantoms. 査読

Kazunori Katashima, Masahiro Kuroda, Masakazu Ashida, Takanori Sasaki, Takehito Taguchi, Hidenobu Matsuzaki, Jun Murakami, Yoshinobu Yanagi, Miki Hisatomi, Marina Hara, Hirokazu Kato, Yuichi Ohmura, Tomoki Kobayashi, Susumu Kanazawa, Sosuke Harada, Mitsuhiro Takemoto, Seiichiro Ohno, Seiichi Mimura, Junichi Asaumi

Acta medica Okayama 67 ( 6 ) 359 - 67 2013年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

It is well known that many tumor tissues show lower apparent diffusion coefficient (ADC) values, and that several factors are involved in the reduction of ADC values. The aim of this study was to clarify how much each factor contributes to decreases in ADC values. We investigate the roles of cell density, extracellular space, intracellular factors, apoptosis and necrosis in ADC values using bio-phantoms. The ADC values of bio-phantoms, in which Jurkat cells were encapsulated by gellan gum, were measured by a 1.5-Tesla magnetic resonance imaging device with constant diffusion time of 30sec. Heating at 42℃ was used to induce apoptosis while heating at 48℃ was used to induce necrosis. Cell death after heating was evaluated by flow cytometric analysis and electron microscopy. The ADC values of bio-phantoms including non-heated cells decreased linearly with increases in cell density, and showed a steep decline when the distance between cells became less than 3μm. The analysis of ADC values of cells after destruction of cellular structures by sonication suggested that approximately two-thirds of the ADC values of cells originate from their cellular structures. The ADC values of bio-phantoms including necrotic cells increased while those including apoptotic cells decreased. This study quantitatively clarified the role of the cellular factors and the extracellular space in determining the ADC values produced by tumor cells. The intermediate diffusion time of 30msec might be optimal to distinguish between apoptosis and necrosis.

DOI： 10.18926/AMO/52009

Solid-type primary intraosseous squamous cell carcinoma of the mandible: a case report with histopathological and imaging features. 査読国際誌

Hidenobu Matsuzaki, Naoki Katase, Tatsushi Matsumura, Marina Hara, Yoshinobu Yanagi, Hitoshi Nagatsuka, Seiji Iida, Jun-Ichi Asaumi

Oral surgery, oral medicine, oral pathology and oral radiology 114 ( 5 ) e71-7 - E77 2012年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE INC

Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare malignant odontogenic tumor arising from odontogenic epithelial remnants within the jawbones. PIOSCC is histopathologically divided into 3 types: solid-type carcinoma, carcinoma derived from a keratocystic odontogenic tumor, and carcinoma derived from an odontogenic cyst. In this article, we report a case of solid-type PIOSCC involving reactive bone formation in the mandible in a 60-year-old female patient together with its histopathological and imaging findings.

DOI： 10.1016/j.oooo.2012.05.019

Diagnostic value of dynamic contrast-enhanced MRI for submucosal palatal tumors. 査読国際誌

Hidenobu Matsuzaki, Yoshinobu Yanagi, Marina Hara, Naoki Katase, Miki Hisatomi, Teruhisa Unetsubo, Hironobu Konouchi, Toshihiko Takenobu, Hitoshi Nagatsuka, Jun-ichi Asaumi

European journal of radiology 81 ( 11 ) 3306 - 12 2012年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER IRELAND LTD

OBJECTIVES: To evaluate the diagnostic value of dynamic contrast-enhanced MRI (DCE-MRI) for differentiating between benign and malignant tumors in the palate. MATERIALS AND METHODS: 26 patients with submucosal palatal tumors were preoperatively examined using DCE-MRI. Their maximum contrast index (CImax), time of CImax (Tmax), and washout ratios (WR300 and WR600) were determined from contrast index curves. The submucosal palatal tumors were divided into two groups according to their Tmax values: the early enhancement group (Tmax<300 s) consisted of 9 malignant tumors and 6 benign tumors, while the late enhancement group (Tmax≥300 s) included one malignant tumor and 10 benign tumors. We compared the following DCE-MRI parameters between the benign and malignant tumors: CImax and Tmax in all cases and CImax, Tmax, and the washout ratios in the early enhancement group. In addition, we performed a regression analysis of the relationships between tumor size and DCE-MRI parameters; i.e., CImax, Tmax, and washout ratios, among the malignant salivary gland tumors and pleomorphic adenomas. RESULTS: In all cases and the early enhancement group, significant differences in Tmax were detected between the benign and malignant tumors (P<0.001 and P<0.05, respectively), and the optimal Tmax cutoff value for differentiating between them was found to be 165 s. None of the other parameters displayed significant differences between the benign and malignant tumors. Only the WR600 of the pleomorphic adenomas was significantly correlated with tumor size (R2=0.92, P<0.001). CONCLUSIONS: Tmax is a useful parameter for distinguishing between benign and malignant submucosal palatal tumors.

DOI： 10.1016/j.ejrad.2012.04.009

Bone quality and quantity of the anterior maxillary trabecular bone in dental implant sites. 国際誌

Mari Wakimoto, Tatsushi Matsumura, Takaaki Ueno, Nobuyoshi Mizukawa, Yoshinobu Yanagi, Seiji Iida

Clinical oral implants research 23 ( 11 ) 1314 - 9 2012年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

OBJECTIVES: The aim of this study was to investigate the characteristics of implant sites on the edentulous alveolar ridge in the anterior maxilla. We studied the bone quantity and quality of implant sites at the anterior maxilla using CT images for the 33 implant sites on patients who underwent dental implant therapy in our Department since 2006. MATERIALS AND METHODS: Computed tomography (CT) images of 33 patients (20 women: 13 men) encompassing 33 implant sites were chosen and examined. The recipient sites for implant placement were determined based on CT data using an implant planning software (Simplant 11.0). The mean bone density values in Hounsfield unit (HU) were recorded using Simplant for both the simulated implant areas and the trabecular bone width. We classified the edentulous alveolar ridge and bone quality according to a classification based on Lekholm and Zarb (1985). RESULTS: Incisors had higher bone densities than canines. Women had lower bone densities than men. Canines displayed greater trabecular bone density and alveolar bone widths than incisors. No maxillary sites were judged to have a bone quality of 1 in this group. Quality 3 accounted for 69.7% of the total samples. CONCLUSIONS: An assessment of bone quality in the anterior alveolar ridge may well reflect age-related systemic pathological conditions and should be used in dental implant treatment planning to avoid associated risk factors.

DOI： 10.1111/j.1600-0501.2011.02347.x

Minor salivary gland tumors in the oral cavity: diagnostic value of dynamic contrast-enhanced MRI. 査読国際誌

Hidenobu Matsuzaki, Yoshinobu Yanagi, Marina Hara, Naoki Katase, Jun-ichi Asaumi, Miki Hisatomi, Teruhisa Unetsubo, Hironobu Konouchi, Toshihiko Takenobu, Hitoshi Nagatsuka

European journal of radiology 81 ( 10 ) 2684 - 91 2012年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER IRELAND LTD

OBJECTIVE: To evaluate the diagnostic value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) for minor salivary gland tumors in the oral cavity. MATERIALS AND METHODS: Thirty-two patients with minor salivary gland tumors were examined preoperatively using DCE-MRI. Their maximum contrast index (CImax), time of CImax (Tmax), Tpeak; i.e., the time that corresponded to the CImax×0.90, and washout ratios (WR300 and WR600) were determined from contrast index (CI) curves. We compared these parameters between benign and malignant tumors and among the different histopathological types of minor salivary gland tumors. Then, we categorized the patients' CI curves into four patterns (gradual increase, rapid increase with high washout ratio, rapid increase with low washout, and flat). RESULTS: Statistically significant differences in Tmax (P=0.004) and Tpeak (P=0.002) were observed between the benign and malignant tumors. Regarding each histopathological tumor type, significant differences in Tmax (P<0.001), Tpeak (P<0.001), and WR600 (P=0.026) were observed between the pleomorphic adenomas and mucoepidermoid carcinomas. It was difficult to distinguish between benign and malignant tumors using our CI curve classification because that two-thirds of the cases were classified into the same type (gradual increase). CONCLUSION: The DCE-MRI parameters of minor salivary gland tumors contributed little to their differential diagnosis compared with those for major salivary gland tumors. During the diagnosis of minor salivary gland tumors, Tmax is useful for distinguishing between benign and malignant tumors.

DOI： 10.1016/j.ejrad.2011.11.005

Ossifying fibroma of the maxilla: a case report including its imaging features and dynamic magnetic resonance imaging findings. 査読国際誌

Marina Hara, Hidenobu Matsuzaki, Naoki Katase, Yoshinobu Yanagi, Teruhisa Unetsubo, Jun-ichi Asaumi, Hitoshi Nagatsuka

Oral surgery, oral medicine, oral pathology and oral radiology 114 ( 4 ) e139-46 - E146 2012年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE INC

Ossifying fibroma (OF), a rare nonodontogenic tumor, is defined as a bone-related jawbone lesion. The main histopathological feature of OF is the replacement of bone by benign connective tissue. Ossifying fibroma usually occurs in the second to fourth decades of life and shows a predilection for females. Ossifying fibroma most commonly occurs in the mandible, and OF arising from the anterior part of the maxilla is rare. Ossifying fibromas display various radiographic findings, including varying degrees of radiolucency and radiopacity, depending on the proportions of their soft and hard tissue components. Depending on their components, it can be difficult to distinguish OF from other fibroosseous lesions and some odontogenic tumors by using conventional radiographs, computed tomography, and magnetic resonance imaging (MRI). We report a case of OF in the anterior maxilla in a 56-year-old man, together with its histopathological and imaging findings including the dynamic MRI findings.

DOI： 10.1016/j.oooo.2012.04.015

Imaging features of adenoid cystic carcinoma of the tongue with dedifferentiated components: a case report 査読

Yoshinobu Yanagi, Hidenobu Matsuzaki, Naoki Katase, Tomoo Onoda, Marina Hara, Teruhisa Unetsubo, Hitoshi Nagatsuka, Jun-ichi Asaumi

ORAL RADIOLOGY 28 ( 2 ) 157 - 165 2012年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Adenoid cystic carcinoma (ACC) of the head and neck region is an uncommon epithelial tumor of the major and minor salivary glands. In the oral region, although ACC arising from the minor salivary glands is the second most commonly found tumor in the tongue base, its occurrence in the anterior part of the tongue is rare. Histopathologically, ACC is categorized into three growth patterns (tubular, cribriform, and solid types) and three histologic grades (I-III) that are based on the proportions of these patterns. According to this classification, tubular- and cribriform-type ACCs are considered to be lower grade lesions, while solid-type ACCs are considered to be higher grade lesions. A fourth histopathological type has recently been reported by some authors, namely, dedifferentiation or high-grade transformation of ACC. However, very few studies have focused on the imaging features of these ACCs. We report here the case of a 63-year-old female patient with ACC of the tongue with dedifferentiated components, together with the radiological images and pathological features of this ACC.

DOI： 10.1007/s11282-012-0097-x

Unusual MRI appearance of a lymphoepithelial cyst in the parotid gland 査読

Hidenobu Matsuzaki, Naoki Katase, Yoshinobu Yanagi, Marina Hara, Mariko Fujita, Teruhisa Unetsubo, Hitoshi Nagatsuka, Jun-ichi Asaumi

ORAL RADIOLOGY 28 ( 2 ) 133 - 139 2012年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Lymphoepithelial cysts, which are also known as branchial cleft cysts, commonly occur in the lateral cervical region. Lymphoepithelial cysts arising in the parotid gland are rare and must be distinguished from parotid gland tumors. Magnetic resonance imaging (MRI) is useful for diagnosing parotid gland lesions, and MR images of lymphoepithelial cysts typically display a cystic mass that appears homogeneously hypointense on T1-weighted images and homogeneously hyperintense on T2-weighted images. However, some parotid gland tumors that retain fluid in their inner sections show similar MRI findings to lymphoepithelial cysts. Furthermore, lymphoepithelial cysts are sometimes modified by inflammation, and these cases are hard to diagnose. We report the case of a 59-year-old female with a lymphoepithelial cyst that arose in the parotid gland. The cyst had been affected by inflammation and displayed atypical imaging findings, i.e., heterogeneous signal intensity of the liquid component and the presence of a well-enhanced capsule-like structure surrounding the liquid component. In addition, we compare the MRI findings of this case with those of two other cervical lymphoepithelial cysts.

DOI： 10.1007/s11282-012-0086-0

Central odontogenic fibroma of the jawbone: 2 case reports describing its imaging features and an analysis of its DCE-MRI findings. 査読国際誌

Marina Hara, Hidenobu Matsuzaki, Naoki Katase, Yoshinobu Yanagi, Teruhisa Unetsubo, Jun-Ichi Asaumi, Hitoshi Nagatsuka

Oral surgery, oral medicine, oral pathology and oral radiology 113 ( 6 ) e51-8 - E58 2012年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE INC

Odontogenic fibroma (OF) is a rare nonepithelial benign tumor arising from the odontogenic mesenchymal tissue in the jawbone. OFs are topographically categorized into 2 types, the central type and peripheral type, and are histopathologically divided into the epithelium-poor type and epithelium-rich type. The radiological findings of central OF commonly include a uni- or multilocular radiolucent area with a well-defined margin, which are similar to those of cysts and other benign tumors of the jawbone. Therefore, it is difficult to distinguish OF from these jawbone lesions on radiographs because of their noncharacteristic radiological findings. In this article, we report the cases of 2 patients with central OF who underwent magnetic resonance (MR) examinations and describe the usefulness of dynamic contrast-enhanced MR imaging for diagnosing OF.

DOI： 10.1016/j.oooo.2011.12.013

口腔内に露出した歯牙腫の1例

高木愼, 平田泰久, 石田展久, 森谷徳文, 柳文修

日本口腔診断学会雑誌 25 ( 2 ) 178 - 181 2012年6月

記述言語：日本語出版者・発行元：(一社)日本口腔診断学会

60歳女。左側上顎大臼歯からの排膿を主訴とした。約2年前より主訴が出現し、紹介受診時には左側上顎第2、3大臼歯部頬側から歯肉頬移行部にかけて黄色凹凸不正な硬個物を認めた。CTにて左側上顎第2大臼歯から第3大臼歯にかけて観察された歯槽骨吸収は上顎洞底にまでおよび、同第3大臼歯下方には内部不均一で辺縁不正な高吸収域を認めた。左側上顎歯牙腫、智歯周囲炎および歯性上顎洞炎疑いと診断し、腐骨と思われる硬個物摘出術と埋伏智歯抜去術を行ったところ、硬個物と周囲との癒着や、抜歯窩から上顎洞への交通は認めず、術後2ヵ月まで鼻症状もなく良好に経過した。また、摘出物の大部分は象牙質様構造で所々にセメント質様構造を有しており、複雑性歯牙腫と診断した。本症例では加齢による歯槽骨吸収および歯周病による歯肉退縮により骨露出し、それに感染が加わって歯牙腫が露出したと考えられた。

Recent advances in the diagnostic imaging of cysts and pseudocysts in the oral and maxillofacial region

Jun ichi Asaumi, Hironobu Konouchi, Yoshinobu Yanagi, Miki Hisatomi, Hidenobu Matsuzaki, Jun Murakami, Teruhisa Unetsubo, Mariko Fujita, Marina Hara

Cysts: Causes, Diagnosis and Treatment Options 1 - 53 2012年3月

掲載種別：論文集(書籍)内論文

It is sometimes difficult to differentiate cysts and pseudocysts from tumors in the jawbone on the basis of conventional radiographs. Moreover, cysts and pseudocysts that arise in soft tissue can not be detected on radiographic images without the use of contrast agents. Therefore, additional information is sometimes required to diagnose these lesions. Computed tomography and magnetic resonance imaging (CT; MRI) have been demonstrated to be very useful for depicting normal structures and pathological processes in the oral and maxillofacial region. Whereas CT is best for depicting bone structures, MRI is superior to CT at evaluating soft tissue. The contents of bone lesions might also be better visualized on MRI. In this chapter, among the variety of lesions that occur in the oral and maxillofacial region, we would like to focus on those arising in the jaw or adjacent soft tissue. We present their representative CT and MRI findings and discuss the imaging characteristics that most contribute to their differential diagnosis. © 2012 by Nova Science Publishers, Inc. All rights reserved.

Test-retest reliability of MRI-based disk position diagnosis of the temporomandibular joint. 国際誌

Chiyomi Nagamatsu-Sakaguchi, Kenji Maekawa, Tsuyoshi Ono, Yoshinobu Yanagi, Hajime Minakuchi, Shouichi Miyawaki, Junichi Asaumi, Teruko Takano-Yamamoto, Glenn T Clark, Takuo Kuboki

Clinical oral investigations 16 ( 1 ) 101 - 8 2012年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

This study evaluated the test-retest reliability for determining the temporomandibular joint (TMJ) disk position, diagnosed using magnetic resonance imaging (MRI). These assessments were done as a base-line measurement for a prospective cohort study, which examines the risk factors for precipitation and progression of temporomandibular disorders. Fifteen subjects (mean age, 24.2 ± 0.94 years; male/female = 8/7) were recruited from the students of Okayama University Dental School. Sagittal MR TMJ images were taken with a 1.5-T MR scanner (Magneton Vision, Siemens) in close and maximal open positions twice at about 1-week (6-11 days) interval. The images were displayed using 200% magnification on a computer screen with a commercially available image software package (OSIRIS, UIN/HCUG). Three calibrated examiners diagnosed the disk positions using the standardized criteria. The disk position of each joint was classified as normal, anterior disk displacement with or without reduction, and others. The first and second disk position diagnoses were compared, and the test-retest reliability level was calculated using the kappa index. The second disk position diagnosis was consistent with the first in 27 out of 30 joints. The calculated kappa value representing the test-retest reliability level between the first and second disk position diagnosis was 0.812. These results indicated that the test-retest reliability of MRI-based diagnosis of TMJ disk positions at about 1-week interval was substantially high, even though they were not completely consistent.

DOI： 10.1007/s00784-010-0476-9

Mechanomyographic activity in the human lateral pterygoid muscle during mandibular movement. 国際誌

Shigehisa Kawakami, Naoki Kodama, Naoto Maeda, Shunichi Sakamoto, Kazuhiro Oki, Yoshinobu Yanagi, Jun-Ichi Asaumi, Teruta Maeda, Shogo Minagi

Journal of neuroscience methods 203 ( 1 ) 157 - 62 2012年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

The activity of the lateral pterygoid muscle has been regarded to be related to the pathological condition of the temporomandibular joint (TMJ) in the craniomandibular disorders. Because the lateral pterygoid muscle is a deep muscle, a needle electrode is necessary for EMG recordings. The purpose of this study was to establish a non-invasive method for the evaluation of muscle activity of the lateral pterygoid muscle using mechanomyogram (MMG). In three male subjects, surface electromyogram (EMG) in the left masseter muscle, left anterior and posterior belly of the temporal muscle, left anterior belly of the digastric muscle and needle EMG of the inferior head of the lateral pterygoid were recorded during mandibular movement tasks simultaneously with the MMG derived from a condenser microphone in the external ear canal. There were significant positive correlations between the needle EMG signal of the lateral pterygoid muscle and the MMG signal for the tasks of static jaw opened position of 30 mm of interincisal distance (p=0.000, R(2)=0.725), static jaw opened position of 40 mm of interincisal distance (p=0.000, R(2)=0.753), 5mm protruded mandibular position (p=0.000, R(2)=0.653), the most protruded mandibular position (p=0.000, R(2)=0803). On the contrary, for the task of maximal clenching, there was no significant correlation between the EMG signal of the lateral pterygoid muscle and the MMG signal. These results suggest that the activity of the lateral pterygoid muscle could be evaluated by the MMG signals recorded in the external ear canal, unless jaw closing major muscles show active contraction.

DOI： 10.1016/j.jneumeth.2011.09.026

Magnetic resonance imaging (MRI) and dynamic MRI evaluation of extranodal non-Hodgkin lymphoma in oral and maxillofacial regions. 査読国際誌

Hidenobu Matsuzaki, Marina Hara, Yoshinobu Yanagi, Jun-ichi Asaumi, Naoki Katase, Teruhisa Unetsubo, Miki Hisatomi, Hironobu Konouchi, Toshihiko Takenobu, Hitoshi Nagatsuka

Oral surgery, oral medicine, oral pathology and oral radiology 113 ( 1 ) 126 - 33 2012年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE INC

OBJECTIVE: The purpose of this study was to evaluate the diagnostic value of magnetic resonance imaging (MRI), especially dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), in extranodal non-Hodgkin lymphoma (NHL) of oral and maxillofacial regions. STUDY DESIGN: Thirteen cases with extranodal NHL were examined using MRI. T1-weighted images (T1WI) and T2-weighted images (T2WI) or short TI inversion recovery (STIR) images were obtained in all cases. Contrast-enhanced images and DCE-MRI were acquired in 10 and 7 cases, respectively. On DCE-MRIs, we analyzed the parameters as follows: contrast index at maximal contrast enhancement (CImax), maximum contrast index (CI) gain/CImax ratio, and washout ratios (WR(300), WR(600), and WR(900)) at 300, 600, and 900 seconds after contrast medium injection. RESULTS: The signal intensity of all lesions was hypointense to isointense on T1WIs and showed variable contrast enhancement patterns. On T2WIs and STIR images, the signal intensity was isointense to hyperintense in almost all cases. Analysis of DCE-MRI parameters in extranodal NHLs resulted in the identification of 4 types of CI curves according to CImax and WR: (1) CImax greater than 2.0 and WR(900) greater than 40%, (2) CImax greater than 2.0 and WR(900) less than 40%, (3) CImax less than 1.5 and WR(900) greater than 40%, and (4) CImax less than 1.5 and WR(900) greater than 40%. CONCLUSIONS: The signal intensities on MRI were not specific to extranodal NHL and resembled those of other tumor types. When CImax was less than 1.5 or WR900 was less than 40%, these parameters contributed to diagnosis in extranodal NHLs.

DOI： 10.1016/j.tripleo.2011.07.038

Correlation between Direct Anthropometry and Di3D Camera System 査読

Jae Hyun Park, Anita Angela Sharma, Kiyoshi Tai, Seiji Iida, Yoshinobu Yanagi, Jun-ichi Asaumi, Je-Won Shin

JOURNAL OF HARD TISSUE BIOLOGY 21 ( 1 ) 87 - 91 2012年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：JOURNAL HARD TISSUE BIOLOGY

The purpose of this study was to determine the accuracy of a new high resolution digital camera-based three-dimensional system called Di3D by comparing with traditional direct anthropometry using digital calipers. The study sample consisted of 20 young adults, 10 male and 10 female. Facial soft tissue landmarks were identified and five linear distances were measured between the landmarks for each subject using the two methods; Di3D camera system and a digital caliper. No statistically significant differences (P > 0.05) were found for all five facial soft tissue distances measured by the Di3D camera system and the digital caliper. The magnitude of differences was very small (mean = 0.73 mm). Good congruence was observed between the means derived from the Di3D system and the digital caliper.The overall mean differences of the five measurements with these two methods were small enough to be clinically insignificant. The results show that both methods are concordant and one method can replace the other in clinical use.

DOI： 10.2485/jhtb.21.87

Two-piece customized mold technique for high-dose-rate brachytherapy on cancers of the buccal mucosa and lip. 国際誌

Hidenobu Matsuzaki, Mitsuhiro Takemoto, Marina Hara, Teruhisa Unetsubo, Yoshinobu Yanagi, Kuniaki Katsui, Norihisa Katayama, Kotaro Yoshio, Toshihiko Takenobu, Masahiro Kuroda, Susumu Kanazawa, Jun-Ichi Asaumi

Oral surgery, oral medicine, oral pathology and oral radiology 113 ( 1 ) 118 - 25 2012年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

OBJECTIVE: High-dose-rate (HDR) brachytherapy using a customized mold is a minimally invasive treatment for oral cancer; however, it is difficult to use this technique for buccal and lip cancers involving the commissura labiorum, owing to its anatomic form. The purpose of this study was to introduce an improved customized mold consisting of 2 pieces to allow the fixation of molds to these sites. STUDY DESIGN: Five patients with buccal carcinoma and 1 patient with lip carcinoma were treated with this technique after external beam radiotherapy. One patient with neck metastasis underwent both neck dissection and partial tumor resection before HDR brachytherapy. RESULTS: At the end of the follow-up period, 5 patients had no tumor recurrence, and 1 patient had suffered local recurrence. CONCLUSIONS: Our technique is a viable therapeutic option for patients with buccal and lip carcinomas for whom the therapeutic modalities are limited by age, performance status, and other factors.

DOI： 10.1016/j.tripleo.2011.06.038

Class III occlusion with missing maxillary first molars and facial asymmetry treated with intraoral vertical ramus osteotomy: 7-year follow-up. 国際誌

Jae Hyun Park, Kiyoshi Tai, Hitoshi Hotokezaka, Yoshinobu Yanagi, Kazuhisa Ikeda

Orthodontics : the art and practice of dentofacial enhancement 13 ( 1 ) 110 - 21 2012年

記述言語：英語掲載種別：研究論文（学術雑誌）

A 17-year-old girl with a Class III occlusion and facial asymmetry was treated with orthodontics and intraoral vertical ramus osteotomy (IVRO). She had a severe skeletal Class III relationship (Wits, -17 mm). Even though she had a prognathic mandible, she showed a straight rather than concave profile because of severe mandibular dental compensation. The patient also had severe mandibular deviation. After 17 months of presurgical orthodontic treatment, IVRO was performed. Total active treatment time was 26 months. Both occlusion and facial appearance were significantly improved by the surgical-orthodontic treatment. There were no functional problems during or after treatment. Posttreatment records after 7 years showed excellent results with good, stable occlusion; facial balance and harmony; and long-term stability.

　前のページ - 次のページ　

1
2
3
4
5