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Dose Distributions in Simulated Electron Radiotherapy with intraoral Cones Using Treatment Planning System

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2017年第3期6卷 280-289页

作者： Tomohiro Shimozato Kuniyasu Okudaira Department of Radiological Technology Gifu University of Medical Science Gifu Japan Department of Radiotherapy Nagoya University Hospital Aichi Japan

Aim: This study aims to evaluate the difference between depth data from an intraoral cone and a conventional irradiation tube calculated using a treatment planning system (TPS), and that measured using an intraoral cone for electron radiotherapy. Background: A TPS is only compatible with conventional irradiation tubes. However, such systems are not suitable for determining dose distributions when a special cone is employed. Materials and Methods: Dose distributions were calculated using the beam data for mounted intraoral cones using a TPS. Then, the dose distribution by field size was calculated for a low-melting-point lead alloy using the beam data for a mounted conventional tube. The calculated data were evaluated against the measured intraoral-cone depth data based on the dose and depth differences. Results: The calculated data for the intraoral cone case did not match the measured data. However, the depth data obtained considering the field size determined for the lead alloy using the conventional tube were close to the measured values for the intraoral cone case. The difference in the depth at which the absorbed dose was 50% of the maximum value of the percentage depth dose was less than ±4 mm for the generalized Gaussian pencil beam convolution algorithm and less than ±1 mm for the electron Monte Carlo algorithm. Conclusion: It was found that the measured and calculated dose distributions were in agreement, especially when then electron Monte Carlo algorithm was used. Thus, the TPS can be employed to determine dose distributions for intraoral cone applications.

关键词： Treatment Planning System Electron Radiotherapy intraoral Cone Depth Dose Algorithm

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A new method for intraoral tissue defect repair:diepithelialized tissue flap with vascular anastomosis

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Journal of Medical Colleges of PLA(China) 1991年第2期6卷 147-150页

作者：李慧增孙远杨光玉杨道福史文进 Department of Oral and Maxillofacial Surgery Southwest HospitalThird Military Medical CollegeChongqing 630038

Diepithelialized tissue flap(DTF)with vascular anastomosis was de-signed in August 1987,and was used for the repair of 12 cases of large intraoraltissue *** the operations were *** clinical data were reportedand the procedure to incise and transplant a DTF *** the healingprocess and changes of DTF after transplantation were observed,it was foundthat a layer of new smooth epidermis was formed on the surface of the *** of this new epidermis was *** out of the 12 cases have been fol-lowed up for from half a year to 2 and a half years,and the results *** new epidermis showed no hair growth and the patients did nothave any rough feeling,which usually occurred after ordinary skin *** isbelieved that DTF transplantation is likely an ideal method for the repair andreconstruction of intraoral soft tissue *** disadvantage was that the DTFcontracted severely after *** the authors put forward the problemsconcerning the transplantation of DTF,which should be investigated further.

关键词： intraoral tissue defect vascular anastomosis diepithelialized tissue flap vascular surgery

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Changes of Transverse Mandibular Width in Set-Back Mandibular Surgery: Sagittal Split versus intraoral Verticosagittal Osteotomy

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International Journal of Clinical Medicine 2018年第5期9卷 400-407页

作者： Farnoosh Razmara Hamid Mahmoodhashemi Shohreh Zahraei Ali Mahmoudhashemi Department of Oral and Maxillofacial Surgery Craniomaxillofacial Research Center Tehran University of Medical Sciences Tehran Iran Department of Pediatric Dentistry Dental Branch Islamic Azad University Tehran Iran Dentist Private Practice Tehran Iran

Aim: This study was performed to evaluate the movement of the proximal segment following different methods of ramus osteotomy that is one of the side effects of orthognathic surgery. Theoretically, with intraoral verticosagittal ramus osteotomy, it can minimize the movement of the proximal segment. The changes in the intergonal distance of mandible and the angle of the ramus flaring in two methods of osteotomy have been compared in this study. Materials and Methods: In this randomized clinical trial, included 60 patients (32 males) with mandibular prognathism and without any asymmetry were selected and divided into two groups (n = 30). One group underwent bilateral sagittal split ramus osteotomy technique to achieve mandibular setback and the other by the intraoral verticosagittal ramus osteotomy technique. Intergonial width and inner-ramal angle in the transverse plane were measured on radiographs preoperatively and 1 and 12 weeks postoperatively. Data were analyzed using covariance test with the significance level set at P 0.1). Conclusion: Considering our findings, there was no significant difference between two ramus osteotomy techniques regarding changes in mandibular width and inter-ramal flaring angle.

关键词： Bilateral Sagittal Split Ramus Osteotomy (BSSRO) intraoral Verticosagittal Ramus Osteotomy (IVSRO) Intergonial Width Mandibular Prognathism Inter Ramal Angle

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Tooth loss caused by displaced elastic during simple preprosthetic orthodontic treatment

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World Journal of Clinical Cases 2016年第9期4卷 285-289页

作者： Simona Dianiskova Chiara Calzolari Marco Migliorati Armando Silvestrini-Biavati Gaetano Isola Fabio Savoldi Domenico Dalessandri Corrado Paganelli Orthodontic Postgraduate Programme Dental SchoolSlovak Medical University Orthodontics Department School of DentistryUniversity of Genova Department of Biomedical Odontostomatological Sciences and of Morphological and Functional ImagesUniversity of Messina Department of Neurosciences Reproductive and Odontostomatological SciencesSchool of MedicineUniversity "Federico Ⅱ" Department of Orthodontics School of DentistryUniversity of Brescia

The use of elastics to close a diastema or correct tooth malpositions can create unintended consequences if not properly controlled. The American Association of Orthodontists recently issued a consumer alert, warning of "a substantial risk for irreparable damage" from a new trend called "do-it-yourself" orthodontics, consisting of patients autonomously using elastics to correct tooth position. The elastics can work their way below the gums and around the roots of the teeth, causing damage to the periodontium and even resulting in tooth loss. The cost of implants to replace these teeth would well exceed the cost of proper orthodontic care. This damage could also occur in a dental office, when a general dentist tries to perform a simplified orthodontic correction of a minor tooth malposition. The present case report describes a case of tooth loss caused by a displaced intraoral elastic, which occurred during a simple preprosthetic orthodontic treatment.

关键词： Orthodontics intraoral elastics Periodontal damage Tooth extraction Pre-prosthetic treatment

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Recent advances in imaging technologies in dentistry

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World Journal of Radiology 2014年第10期6卷 794-807页

作者： Naseem Shah Nikhil Bansal Ajay Logani Department of Conservative Dentistry and Endodontics Centre for Dental Education and Research All India Institute of Medical Sciences

Dentistry has witnessed tremendous advances in all its branches over the past three decades. With these advances, the need for more precise diagnostic tools,specially imaging methods, have become *** the simple intra-oral periapical X-rays, advanced imaging techniques like computed tomography, cone beam computed tomography, magnetic resonance imaging and ultrasound have also found place in modern dentistry. Changing from analogue to digital radiography has not only made the process simpler and faster but also made image storage, manipulation(brightness/contrast, image cropping, etc.) and retrieval easier. The three-dimensional imaging has made the complex cranio-facial structures more accessible for examination and early and accurate diagnosis of deep seated lesions. This paper is to review current advances in imaging technology and their uses in different disciplines of dentistry.

关键词： Dental X-rays intraoral X-rays Dental cone beam computed tomography Panoramic radiograph Cephalogram

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Effect of Inhabitation Mouthwash Solution Containing Chlorine Dioxide (Pro Fresh<sup>®</sup>) on Oral Malodor

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Health 2015年第2期7卷 211-219页

作者： Masaki Sawa Senichi Suzuki Masakazu Azuma Tomoko Yoshizawa Kaiho Otomi Takuji Yamaguchi Hiroyuki Kobayashi Department of Hospital Administration Juntendo University Graduate School of Medicine Tokyo Japan Sawa Dental Office Aichi Japan Department of Emergency and Disaster Medicine Juntendo University Graduate School of Medicine Tokyo Japan Center for Advanced Kampo Medicine and Clinical Research Juntendo University Graduate School of Medicine Tokyo Japan

Recently, the interest in oral malodor has been grown and the number of people having trouble with oral malodor is increasing year by year. Generally, as the branch of medicine which deals with patients complaining about oral malodor, dentistry is mostly chosen. On the current situation, however, the dental office side typically finds it difficult to deal with several kinds of oral malodor which show no improvement even though cavities or periodontal disease is completely cured. Main components to cause oral malodor are volatile sulfur compounds (methyl mercaptan, dimethyl sulfide, hydrogen sulfide);in the present study, therefore, the effect of mouthwash solution containing chlorine dioxide to relieve oral malodor and increase saliva production was tested. The subjects were 92 patients (Control group: 2 males, 3 females, age;30.8 ± 4 years old, Mouthwash group: 28 males, 59 females, age: 36.9 ± 1.3 years old) who visited the hospital complaining about oral malodor. intraoral gas, exhaled gas, the saliva production at rest, the ability for salivation and the buffering ability of saliva were examined twice, before the subjects used the mouthwash solution every day for one month. The simple chromatography oral chroma, which was insulated from the influence of temperature and humidity and also was able to measure with a high degree of accuracy, was used to measure odor as the device analysis method. The control group did not change in VSCs, saliva production and the buffering ability of saliva. After using mouthwash solution, the concentration of the 3 major components gas of intraoral gas and exhaled gas, i.e. methyl mercaptan, dimethyl sulfide, hydrogen sulfide, were all decreased. As for hydrogen sulfide, intraoral gas (from 225.8 ± 28.1 ppb to 41.1 ± 8.8 ppb) and exhaled gas (from 212.0 ± 50.4 ppb to 34.6 ± 16.6 ppb) was significantly decreased. Also, saliva production at rest (from 1.3 ± 0.1 ml to 1.7 ± 0.1 ml) and the ability to salivate (from 4.5 ± 0.3 ml to 5.1

关键词： Chlorine Dioxide Oral Malodor Volatile Sulfur Compounds intraoral Gas Exhaled Gas

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Minor Salivary Gland Tumors: A Retrospective Study of 37 Cases

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Open Journal of Stomatology 2022年第12期12卷 363-371页

作者： Hiroshi Yamamoto Yukiko Iizuka Erika Iwai Shu Fushimi Ryutaro Tsuchimoto Minami Akagi Shina Kato Kunio Hayashi Mitsuko Nakayama Masaaki Suemitsu Tadahiko Utsunomiya Yoshikazu Nakayama Kayo Kuyama Masamichi Komiya Department of Oral Surgery Nihon University School of Dentistry at Matsudo Chiba Japan Nihon University Graduate School of Dentistry at Matsudo Oral and Maxillofacial Surgery Chiba Japan Department of Pathology Nihon University School of Dentistry at Matsudo Chiba Japan Nihon University Graduate School of Dentistry at Matsudo Oral Pathology Chiba Japan

Salivary gland tumors represent 2% - 6.5% of all head and neck tumors. Since salivary gland tumors have various clinical features and histological types, it is often difficult to diagnose and treat them. The aim of this study was to conduct a retrospective clinical-statistical analysis of 37 minor salivary gland tumors (MSGTs) treated in the Department of Oral Surgery at Nihon University School of Dentistry at Matsudo over a 16-year period. The frequencies and distributions of sex, age, occurrence site, preoperative examination (fine needle cytology and/or biopsy), treatment, and prognosis of the tumors were analyzed and compared with previous reports. The average age at diagnosis was 58.1 years (range 22 - 91 years). The peak occurrence of tumors was in the sixties (10 cases, 27.0%), followed by the forties (8 cases, 21.6%) and the seventies (7 cases, 18.9%). The average age of patients with benign tumors was 56.8 years (range 22 - 91 years). For malignant tumors, the average age was 61.7 years (range 42 - 81 years). The male-female ratio was 1:2.1 for all minor salivary gland tumors, 1:2.4 for benign tumors, and 1.5:1 for malignant tumors. There were 27 (73.0%) benign and 10 (27.0%) malignant tumors. Pleomorphic adenoma (PA) was the most common tumor (24 (64.9%) cases). Most salivary gland tumors originated from the palate (21 cases, 56.8%);the second most common site was the buccal mucosa (14 cases, 37.8%). For most patients, an intraoral mass was the primary presentation, and the second most common symptom was swelling. Surgical treatment was performed for all cases, both benign and malignant tumors. There was one case of local recurrence of PA, as well as one of multiple lung metastases after surgery for adenoid cystic carcinoma. Diagnosis and treatment of MSGTs are often delayed because the patients have few symptoms, and it is difficult to distinguish benign from malignant tumors. More cases need to be examined in the future, and the diagnostic accuracy of im

关键词： Minor Salivary Gland Tumor Clinical Statistics intraoral Japanese

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Sublingual epidermoid cyst—a case report

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Health 2010年第6期2卷 613-614页

作者： Satheesh kumar Bhandary Vadisha Bhat M. Shwetha Shenoy Department of ENT and Head-Neck Surgery K. S. hegde Medical Academy

In this article we present the case of an epidermoid cyst of sublingual space along with submental extension in a 35 year old lady who presented with a mass in the oral cavity. On examination a mass was seen on the floor of the mouth displacing the tongue superiorly. Diffuse fullness was noted in the submental region. The lesion was excised under general anaesthesia with nasotracheal intubation. The entire mass was removed intra orally. The histological features were suggestive of epidermoid cyst. The patient did well postoperatively and no recurrence was seen during 8 months follow up.

关键词： Sublingual Epidermoid Cyst intraoral Approach

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