Japan Dental Association

Author(s): Takayuki TAKEDA

Affiliation: Takeda Dental Clinic, Chiyoda-ku, Tokyo

Title: Dental implant treatment in the elderly

Abstract

The pros and cons, and the safety, of dental implant treatment in the elderly have long been discussed. There are various ways of looking at the issue. On one hand, positives in using implant treatment are improvement of masticatory ability and extension of healthy life expectancy for however short a time. On the other hand, there may be apprehension regarding the ability of the patient to come for needed maintenance if he or she later enters a care facility. This paper discusses the benefits in actual cases that have occurred, and what preparations must be made while patients are able to attend the clinic.

Keywords: Elderly, Dental implant, Nursing care

Author(s): Manabu YANAGITA１）, Shinya MURAKAMI２

Affiliation: １）Department of Oral Health, Kobe Tokiwa Junior College
２）Department of Periodontology, Osaka University Graduate School of Dentistry

Title: Effects of cigarette smoke on periodontal tissues

Abstract

Cigarette smoking is a major environmental risk factor for chronic periodontitis. Higher progression rates of chronic periodontitis and inferior outcomes of periodontal treatment in smokers compared with non-smokers have been shown in many studies. Previous studies investigated the effects of cigarette smoking on the onset of periodontitis and alveolar bone loss in terms of periodontal tissues, host defense mechanisms, and periodontal pathogens. This paper describes the effects of cigarette smoke on periodontal ligament cells and gingival epithelial cells that make up the periodontal tissues, and periodontitis model mice.

Keywords: Periodontal disease, Cigarette smoking, Cigarette smoke condensate

Author(s): Takuya MIYAWAKI

Affiliation: Department of Dental Anesthesiology and Special Care Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

Title: Emergency medical treatment to adverse events during dental treatment

Abstract

In the current situation of increase in elderly people, we, dentists, have to further pay an attention to safety management during dental treatment. When an adverse event happens during dental treatment, we need to assess the physical status and properly treat the patient. In a sudden cardiac arrest, we have to start the cardiopulmonary resuscitation immediately.
In other cases, we should need giving an oxygen, examining vital signs, and offering an additional therapy if necessary. It is important to periodically update the newest knowledge and repeatedly have a training of emergency medical treatment to adverse events.

Keywords: Elderly people, Vital signs, Emergency medical treatment

Author(s): Masayuki TAKANO

Affiliation: Department of Oral and Maxillofacial Surgery, Tokyo Dental College

Title: The trend of digital technology and its application to dental and oral & maxillofacial surgery fields

Abstract

Advances in digital technology are phenomenal and accelerate further, and medical technology and surgical technique are also entering a new stage. Digital data can be reproduced and reproduced with the same precision at any time, any number, at the same time, and has much more convenience and usefulness than conventional analogs. In the fields of dental and oral and maxillofacial surgery, many new digital technology are being developed such as CAD/CAM, navigation surgery, guided surgery, delivery system, custom made medicine, virtual reality, application to education and training, robot surgery, AI etc. From now on, it will merge with regenerative medicine, nanotechnology, genetic engineering etc., and it will become more generalized. New ideas and countermeasures based on this situation are required.

Keywords: Digital technology, Virtual reality, AI

Author(s): Junji TAGAMI

Affiliation: Cariology and Operative Dentistry Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University

Title: Tooth wear : its pathology and treatment guidelines

Abstract

Though tooth wear is seen in everyone, highly progressed tooth wear is increasing with the advent of social aging. The main causes of tooth wear are attrition, abrasion, erosion and abfraction. Each patient should be examined to determine which of these causes is relevant, and measures taken to prevent further wear. In addition to the symptomatic treatments including restoration and treatment for dentin hypersensitivity, instruction and improvement in regard to lifestyle and brushing, therapies to increase the acid resistance of the teeth, and the use of a night guard are recommended.

Keywords: Attrition, Erosion, Abfraction

Author(s): Takashi YURIKUSA

Affiliation: Division of Dentistry and Oral Surgery, Shizuoka Cancer Center

Title: Oral supportive care for cancer patients

Abstract

Anti-cancer therapy often causes oral complications. When these complications are not solved, cancer treatment may be postponed or discontinued. Oral supportive care is for attending to and preventing oral complications during cancer treatment. Dental professionals aim to lessen dental problems and to improve oral health related quality of life in cancer patients. In other words, we support cancer patients by treating any oral or dental problems. To achieve this goal, we must promote oral supportive care, multidisciplinary medicine, and cooperate with local dentists.

Keywords: Oral supportive care, Perioperative professional oral care, Multidisciplinary medicine

Author(s): Futoshi KOMINE

Affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry

Title: Clinical points for long-term success of metal-free fixed dental prostheses

Abstract

Due to demand for esthetics of patients, reduction of usage of metal alloy, and avoidance of metal allergy, metal-free restorations such as ceramic restorations or indirect composite restorations have been widely used for restorative treatments. This article describes the basic knowledge, results of clinical trials, and tips of clinical procedures for the metal-free fixed dental prostheses.

Keywords: Metal-free, Fixed dental prosthesis, Clinical result

Author(s): Chihiro KOBAYASHI

Affiliation: So Dental Office

Title: Clinical applications of MTA

Abstract

Mineral trioxide aggregate（MTA）is in wide use as a perforation repair material, and with good results. MTA sets by hydration reaction ; therefore, it sets in the presence of water, and will not set without water. MTA has also come to be used as an excellent root canal filling material. However, MTA requires strict control of the water-to-powder ratio in order for it to fully set, so mixing must be performed with great care.

Keywords: MTA, Perforation Repair, Hydration

Author(s): Kenji OKA

Affiliation: Oka Dental Clinic

Title: Periodontal treatment from the etiological and temporal axis perspectives

Abstract

This paper looks back on the history of over half a century of the etiology of periodontal disease and its treatment.
Periodontitis is considered an opportunistic infection, and not permanently curable with antibiotics or special surgical procedures. That is to say, it requires ongoing alleviation and elimination of the source of infection at the periodontal site.
In addition to home care, the essential treatment indicated for this is basic periodontal treatment and maintenance.
Furthermore, the incidence rate is extremely high, so local dental clinics play a major role.

Keywords: Etiology of periodontal disease, Basic periodontal treatment, Maintenance 50410

Author(s): Tomitaka HIRAYAMA

Affiliation: Suzawa Dental Clinic, Kadoma-shi, Osaka

Title: Comprehensive treatment of moderate to severe periodontal disease

Abstract

Patients with moderate to severe periodontal disease may experience pathological tooth mobility caused by attachment loss and alveolar ridge resorption. Also, damage to the periodontal supporting tissue can cause pathological tooth migration, leading to a collapse of occlusion in the molar region and a concomitant reduction in vertical dimension. With further progression, flaring of maxillary anterior teeth is also observed. For such patients, it is important not only to restore compromised vertical dimension and a disrupted occlusal plane, but also to control inflammation in the teeth affected by periodontal disease and deal with mobile teeth. This paper therefore focuses on comprehensive treatment of patients with moderate to severe periodontitis, taking into consideration the application of orthodontics and implants.

Keywords: Periodontal disease, Pathological tooth migration, Comprehensive treatment

Author(s): Pao-Li WANG

Affiliation: Department of Innovation in Dental Education, Osaka Dental University

Title: Required knowledge of Chinese medicine for dentists : The seen and unseen aspects of Chinese medicine as evidence-based medicine

Abstract

The study of Chinese medicine is the study of traditional Chinese methods of healing, and is different from Western medicine in that the discipline it follows is based on a philosophy that draws directly from nature. Chinese medicinal treatment in Japan（kampo）is distinguished from what in the pre-modern Edo period was called Dutch medicine （rampo）, the“kam”meaning“China”and the“ram”meaning“the Netherlands.”While the roots of Japanese kampo are in Chinese medical knowledge, it is based on books such as the Shanghan Lun that came from China, and followed a uniquely Japanese course of development. For that reason, it is now taken to be a different discipline from that of Chinese medicine, with“kampo,”as such, not existing in China. It has been reported that approximately 70-80% of practitioners at medical facilities in Japan have experience of using kampo. Today, the Score Chart for Dental-Related Medicines According to Drug Price Standards published by the Japan Dental Association lists eleven kinds of kampo medicine. This paper is an exposition of the kampo treatment methods required by dentists.

Keywords: Kampo medicine, Oral disease, Evidence-based medicine

Author(s): Ryutaro KOBAYASHI

Affiliation: The Nippon Dental University Hospital

Title: Infection control in clinics

Abstract

There is a definite lack of uniformity in knowledge among dentists, and in awareness in medical settings, regarding the infection control in clinics. In the Ministry of Health, Labour and Welfare's 2018 revision of medical fees, significance is placed, firstly, on the sharing of information pertaining to the standardization of in-clinic infection control through training. Furthermore, this paper serves as an opportunity to impart the basic thinking regarding this matter, thus making it a part of the aforesaid information sharing. It is hoped that knowledge that can be used as a standard measure by which to deal with this issue can be drawn upon in medical settings, and further enhance the clinical environment from here on in.

Keywords: Infection control in clinics, Standard precautions, Autoclave

Author(s): Hideaki MIBU

Affiliation: Mibu Dental Clinic, Fuchu-shi, Tokyo

Title: Prosthodontic treatment for individual patients

Abstract

Through my experiences at a study group, I learned to read a partially edentulous arch in relation to the entire oral cavity. This has become a cornerstone of my practice. Partially edentulous arch screening such as the Eichner classification acts as a compass indicating the level of difficulty involved in a case. However, during the longitudinal follow−up of a case, one realizes that, with various possible systemic reactions to treatment and the various thoughts and feelings of patients, screening alone is not the answer. We need to respond on an individual basis to patient diversity, using minimally invasive techniques, and to assess systemic reactions and levels of patient satisfaction. Prosthetics for a partially edentulous arch requires treatment that reads the future as much as possible, and caters to changes.

Keywords: Clinical practice for saving teeth, Predicting the future, Individuality

Author(s): Hideki TANZAWA

Affiliation: Department of Oral Science, Graduate School of Medicine, Chiba University

Title: Important knowledge associated with daily dental treatment

Abstract

The daily work of dentists consists mainly of treatment for teeth and periodontal tissues. However, as dentists, we must reconfirm our basic knowledge, the areas in general dental practice to which particular attention must be paid, and our cooperation with those in related medical fields if we are to practice safely and cooperate with medical doctors. This article addresses and arranges knowledge that is of particular clinical and anatomical importance.

Keywords: Oral-associated region, Clinical points of note, Anatomical knowledge

Author(s): Shiro KUBO

Affiliation: Kubo Dental Clinic, Wakkanai-shi, Hokkaido

Title: The long-term observation of intentional replantation of teeth

Abstract

Intentional replantation of teeth can be used for infected root canal treatment when other methods are deemed unsuitable. External inflammatory resorption and replacement resorption（ankylosis）of the root are complication factors of intentional replantation that may result from damage of the periodontal membrane. This series of long-term follow-up cases demonstrated that teeth with fused/convergent roots are the most suitable for intentional replantation, as damage to the periodontal membrane can be avoided. Further, atraumatic extraction facilitates optimal periodontal healing.

Keywords: Intentional replantation of teeth, Avulsed teeth, Root resorption

Author(s): Nobuyuki MATSUURA

Affiliation: Department of Dental Anesthesiology, Tokyo Dental College

Title: Strategies for safe and secure local anesthesia

Abstract

Local anesthesia is an essential procedure in daily dental practice, and its success is key to smooth, high quality dental treatment. Dental treatment under effective local anesthesia is comfortable and safe for patients. Moreover, dentists can work stress-free, and provide high quality treatment to patients. This article describes the anatomical features of the maxilla and the mandible and the pharmacological basis of local anesthetics. Allergic reactions to local anesthetics, which have increased recently, and practical techniques for safe and secure local anesthesia are also discussed.

Keywords: Local anesthetics, Local anesthetic technique, Local anesthetic allergy

Author(s): Takeshi NOMURA

Affiliation: Department of Oral Medicine, Oral and Maxillofacial Surgery, Oral Cancer Cencer, Tokyo Dental College

Title: Current trends in the establishment of oral cancer screening system in Japan

Abstract

Dental professionals are needed for their skill in the early detection of oral cancer. Oral cancer is increasing as Japanese society ages. Furthermore, young patients are increasing year by year. However, it is not enough at this point in time just to be able to detect early oral cancer. Recently, mass screening for oral cancer has been held nationwide. In the future, the same kind of screening in the general dental clinic will be considered desirable. Brush cytology is necessary for oral cancer screening. Furthermore, we hope to take advantage of new devices or systems for networking between clinic and hospital so as to improve diagnosis. Oral management for cancer patients is crucial. Dental professionals will be required to enhance their knowledge in the field of cancer care in the near future.

Keywords: Oral cancer screening, Oral cancer, Cancer care

Author(s): Hatsuhiko MAEDA１）, Toru NAGAO２）

Affiliation: １）Department of Oral Pathology, School of Dentistry, Aichi Gakuin University
２）Department of Maxillofacial Surgery, School of Dentistry, Aichi Gakuin University

Title: Concept of oral potentially malignant disorders and oral cancer prevention

Abstract

In the WHO New Classification（2017）, oral potentially malignant disorders（OPMD）was described as a new clinical disease concept. The primary objective of the management of OPMD is to reduce the incidence of malignant transformation, followed by early detection of malignant change. The treatment of OPMD is based on surgical intervention or watchful observation that is wait-and-see or conservative treatment such as a changing life-style factors or chemoprevention.
Among them, smoking cessation is the most cost-effective health intervention to prevent not only cancers but also most lifestyle diseases, and dental health workers should always support smoking cessation.

Keywords: Oral potentially malignant disorders（OPMD）, Oral cancer, Cancer prevention

Author(s): Ken ISHIZAKI

Affiliation: Department of Removable Prosthodontics & Gerodontology, Tokyo Dental College

Title: The role of dentists in postoperative dysfunction of oral cancer and basic procedure of maxillofacial prosthetic treatment

Abstract

Cancer in the head and neck region is characterized by severe postoperative functional and aesthetic dysfunction compared to other cancers because the surgical field plays an important function in social life and cannot be covered with clothing. Although some maxillofacial prosthesis treatments have recently come to be covered by health care insurance, it is still difficult to say that treatment is widespread. There are still many patients who are not receiving proper maxillofacial prosthetic treatment following surgery. The objective of this report is to describe the basic procedures of maxillofacial prosthetic treatment, which is an effort towards provision of standardized cancer treatment.

Keywords: Postoperative dysfunction, Maxillofacial prosthetic treatment, Standardized cancer treatment

Author(s): Fumiyo TAMURA, Miki MIZUKAMI

Affiliation: The Nippon Dental University, Tama Oral Rehabilitation Clinic

Title: Support for development of oral function using the assessment manual of developmental oral function in children : eating behavior and nutrition

Abstract

Feeding problems among children lead to multiple concerns among parents and guardians. A new health insurance dental treatment system for children began in April 2018. Dentists, who are specialists in oral functionality, should have sufficient knowledge of and skills related to children's oral functionality to deal with these problems. In this paper, we explain the process of treatment based on a case where a mother complained that her son was taking a long time to eat.

Keywords: Dental professional, Guardian, Feeding problem

Author(s): Takashi UCHIDA

Affiliation: Department of Oral Diagnostics, Nihon University School of Dentistry at Matsudo

Title: What causes the pain? Pitfalls in diagnosing toothache : before making a diagnosis of non-odontogenic toothache

Abstract

Toothache is the patient complaint most often encountered by dentists. It is essential for dentists to relieve patients of toothache as quickly as possible. This requires an early and accurate diagnosis. In recent years, understanding has grown of toothache not of dental origin : so-called non-odontogenic toothache. However, there are occasional reports of errors where odontogenic toothache is misdiagnosed as non-odontogenic toothache. In this paper, we discuss the dual systems theory : that is, the thinking process used when making a diagnosis for odontogenic toothache, which is difficult to diagnose, along with a case presentation. We also provide precautions to observe when diagnosing toothache.

Keywords: Odontogenic toothache, Non-odontogenic toothache, Dual systems theory

Author(s): Noboru NOMA１），Makoto HAYASHI２）

Affiliation: １）Oral Diagnostic Sciences, Nihon University School of Dentistry
２）Department of Endodontics, Nihon University School of Dentistry

Title: Non-odontogenic toothache due to brain tumor

Abstract

Non-odontogenic toothache due to brain tumor is a condition where the teeth do not play a causal role. In the case of symptomatic trigeminal neuralgia（due to a brain tumor）with paroxysmal pain as the main feature, the diagnosis is relatively easy. In this article, we outline the pathology of non-odontogenic toothache as newly classified by the International Headache Society : ⑴ symptomatic trigeminal neuralgia, and ⑵ painful trigeminal neuropathy due to brain tumor. In addition, we explain the diagnostic method based on qualitative sensory testing, newly covered by Japan’s national health insurance program, and on adjunctive test.

Keywords: Brain tumor, Non-odontogenic toothache, Trigeminal neuropathy

Author(s): Akiko HISANO

Affiliation: Department of Stomatology, Nippon Medical School Hospital

Title: Current status and tasks of perioperative oral management

Abstract

The purpose of perioperative oral management is to protect seriously ill patients, such as those undergoing treatment for cancer and the like, from infection and oral complications by maintaining oral health. Appropriate oral care before a surgical operation can reduce the risk of postoperative pneumonia and surgical site infection. During chemotherapy systemic immunosuppression may occur, and during antiresorptive therapy the risk of medication-related osteonecrosis of the jaw is high. Therefore, oral management before chemotherapy is needed. Ongoing support for patients requires close collaboration between medical and dental professionals.

Keywords: Perioperative oral management, Oral complication, Collaboration between medical and dental professionals

Author(s): Akira NISHIYAMA

Affiliation: Orofacial Pain Management, Tokyo Medical and Dental University

Title: Fundamentals of temporomandibular disorders : pathology and treatment concept

Abstract

Temporomandibular disease（TMD）is a comprehensive diagnostic name that summarizes several pathological conditions. Therefore, it is important to understand each disease condition correctly. Also, since it is necessary for patients to understand correct knowledge about TMD, it is important to conduct disease education before treatment. Treatment should start with conservative therapy and self-management performed by the patient himself is the center of a series of treatments.

Keywords: Familiar pain, Self-limiting, Self-management

Author(s): Masako IKAWA

Affiliation: Orofacial Pain Clinic, Department of Oral surgery, Shizuoka Municipal Shimizu Hospital

Title: Nonodontogenic toothache : diagnostic pitfalls in “toothache”

Abstract

Nonodontogenic toothache is a painful condition which occurs in the absence of a clinically evident cause in the teeth or periodontal tissues. The author reviewed the following eight conditions in line with the Clinical Practice Guideline for Nonodontogenic Toothache issued by the Japanese Society of Orofacial Pain. 1.myofascial toothache, 2.neuropathic toothache, 3.neurovascular toothache, 4.toothache of maxillary sinus origin, 5.cardiac toothache, 6.psychogenic toothache or toothache of psychosocial origin, 7.idiopathic toothache, and 8.toothache caused by various other disorders. Dentists should be knowledgeable about these conditions, and be careful not to conduct unnecessary dental treatment.

Keywords: Nonodontogenic toothache, Orofacial pain, Trigeminal autonomic cephalalgias（TACs）

Author(s): Daisuke AKITA１），Tomoka ITO２），Naoki TSUKIMURA１），Taro MATSUMOTO３）

Affiliation: １）Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
２）Department of Complete Denture Prosthodontics, Nihon University School of Dentistry
３）Department of Functional Morphology Division of Cell Regeneration and Transplantation, Nihon University School of Medicine

Title: Preparation for clinical application in mature adipocyte-derived dedifferentiated fat cells

Abstract

Recently, regenerative medicine using mesenchymal stem cells is believed to be a promising method for destroyed oral and maxillofacial tissues. However, the ideal cell source for tissue regeneration purposes has yet to be clearly determined. Mature adipocyte-derived dedifferentiated fat cells（DFAT cells）are pluripotent, have high proliferative ability, and form a high-purity population. Moreover, DFAT cells can be obtained in mass by dentists from the buccal fat pad using minimally invasive techniques. This paper describes the usefulness of DFAT cells as a cell source for tissue engineering, and methods of preparing them for clinical application.

Keywords: Regenerative medicine, Dedifferentiated fat cells, Cell transplantation

Author(s): Kiyoshi KAWAKAMI

Affiliation: Kawakami Dental Office, Himi-shi, Toyama

Title: Controlling biting force to preserve teeth affected by periodontal disease

Abstract

The essence of periodontal treatment is, without doubt, the control of inflammation, which can be achieved by removing plaque and plaque retention factors. However, when one perceives that the purpose of dentistry is to restore and maintain the chewing function, measures against occlusal trauma, that is, control of biting force, become important as the severity of periodontal disease progresses. Working to preserve teeth by using minimally invasive techniques so as to induce the restoration of bodily function, and making use of natural tooth migration by completely interrupting biting pressure, are effective not only for improving the periodontal environment, but as means of diagnosis for the tooth preservation.

Keywords: Biting force control, Complete cessation of biting pressure, Natural tooth migration

Author(s): Akira NISHIYAMA

Affiliation: Orofacial Pain Management, Tokyo Medical and Dental University

Title: TCH as bruxism

Abstract

Bruxism is often understood as tooth grinding or clenching during sleep. However, bruxism also occurs during waking hours. The force of awake bruxism is smaller than that of sleep bruxism ; but, because it may be more prolonged, it is considered to cause disorders different from sleep bruxism in the Stomatognatic system. The tooth contacting habit （TCH）is one kind of awake bruxism. Since TCH is an unaware behavior, it is necessary to understand the concept correctly and provide appropriate guidance to patients.

Keywords: Awake bruxism, Level down, Behavior modification

Author(s): Shinichi TAKAHASHI

Affiliation: Department of Dermatology, Tokyo Dental College Ichikawa General Hospital

Title: The three pathological conditions requiring dentist-dermatologist collaboration

Abstract

There are three pathological conditions that dentists and dermatologists should collaborate in in clinical practice. The first condition is skin disorders associated with odontogenic infection such as external dental fistula, palmoplantar pustulosis, cheilitis granulomatosa, etc. The dentist is expected to proactively remove dental infection. The dermatologist then evaluates the effects of dental treatment on the primary skin disorders. The second condition is skin diseases accompanied by oral mucosal lesions such as lichen planus, autoimmune bullous disease, erythema multiforme, etc. Dermatologists sometimes ask dentists to take a biopsy of mucosal lesion and undertake local treatment and oral care.
The dermatologist then makes a final diagnosis and decides on systemic treatment, if necessary. The third condition is skin lesions induced by allergy to dental materials（especially dental metals）. The dentist is required to analyze the component of dental materials（such as by X-ray microanalysis）and propose alternative materials on the basis of patch testing by the dermatologist. The dermatologist then evaluates the effect of dental intervention.

Keywords: Odontogenic infection, Oral mucosal lesions, Allergy to dental metals

Author(s): Kazuhito SATOMURA，Seiko TATEHARA，Toru SATO，Momoka FUJINAGA

Affiliation: Department of Oral Medicine and Stomatology, Tsurumi University School of Dental Medicine

Title: Development of fluorescence diagnostic method for early oral cancers

Abstract

With populations in decline due to the declining birthrate and aging of society, social demands for early detection of cancer and minimally invasive treatment are increasing. As the oral cavity is an important organ for quality of life, early detection of oral cancer is of particular importance. However, intraepithelial cancers or early invasive cancers in the oral cavity are often difficult to recognize with the naked eye, and the establishment of a technique for accurately diagnosing them is strongly desired. In this article, we introduce a part of clinical research aimed at developing a new fluorescent diagnostic method using ５-aminolevulinic acid, to realize reliable early detection of oral cancers at an early stage.

Keywords: Early oral cancer, Fluorescence diagnostics, ５-aminolevulinic acid

Author(s): Kaori YAGO

Affiliation: Department of Dentistry and Oral Surgery, Mita Hospital, International Health and Welfare University

Title: Updating antithrombotic therapy and dental surgical procedures

Abstract

Direct oral anticoagulants（dabigatran, rivaroxaban, apixaban and edoxaban : DOAC）have been introduced to improve safety compared with warfarin. The risk ratio of postoperative bleeding in patients taking DOAC was significantly greater than in healthy people during dental surgical procedures such as tooth extraction. However, guidelines recommend that antithrombotic drugs including DOAC, warfarin and antiplatelet agents be continued to prevent thromboembolism such as cerebral infarction and myocardial infarction during tooth extraction.

Keywords: Direct oral anticoagulants（DOAC）, Dental surgical procedures, Tooth extraction

Author(s): Satoshi KAWAI

Affiliation: Yamaguchi Dental Clinic, Nishitokyo-shi, Tokyo

Title: Dealing with unilateral chewing that cause dental midline discrepancy in children

Abstract

Dental midline discrepancy is assessed by visually comparing the relative positions of the upper and lower anterior teeth ; however, the cause and treatment of the condition differ greatly depending on whether the teeth are out of alignment in regard to the upper and lower jaws, or whether the lower jaw is out of alignment in regard to the upper jaw. When the diagnosis is midline discrepancy due to jaw misalignment, oral habits such as unilateral chewing are considered to be the primary cause. The author has studied dental distortion brought on by unilateral chewing, and its causes, and is striving to bring about improvements during the period of childhood by rectifying the problem and conducting functional training.

Keywords: Dental midline discrepancy, Unilateral chewing, Functional training

Author(s): Akikazu SHINYA

Affiliation: Department of Crown and Bridge, School of Life Dentistry at Tokyo, The Nippon Dental University

Title: Fiber-reinforced composite three-unit fixed dental prosthesis : basic science and clinical procedures

Abstract

The fiber-reinforced composite three-unit fixed dental prosthesis, which began to be covered by Japanese health insurance in ２０１８, is used in cases where the second premolar is missing. This fixed dental prosthesis has a preimpregnated E-glass fiber framework veneered by a heat- and light-polymerized high-strength composite. The key to longterm success is providing adequate occlusal/marginal clearance, optimal fiber-frame design, and good adhesion to abutment teeth.

Keywords: Hybrid composite three-unit fixed dental prosthesis, Fiber reinforced composite, Metal-free fixed dental prosthesis

Author(s): Keisuke HANDA

Affiliation: Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry

Title: Possibility of jaw bone regeneration therapy by mesenchymal stem cell transplantation

Abstract

The presence of stem cells capable of regenerating tissue is essential in regenerative medicine. Cell transplantation therapy using mesenchymal stem cells, used primarily in the medical field, has been developed and studied, and what have to date been incurable diseases have gradually been overcome. Clinical application of regenerative therapy using mesenchymal stem cells has begun in the dental field as well. This article presents the current status of regenerative medicine that uses mesenchymal stem cells, and the latest regenerative therapy in the dental field.

Keywords: Mesenchymal stem cells, Cell transplant therapy, Bone regeneration

Author(s): Kazuo KITAMURA

Affiliation: Division of General Dentistry, The Nippon Dental University Hospital

Title: How to enlarge and then obturate curved root canals successfully

Abstract

The success of the treatment of curved root canal often depends on whether or not a patient’s original root canal shape can be preserved during initial treatment. Even clinicians with limited experience can preserve the original shape if they use a rotary file that is made from nickel titanium with non-superelastic shape memory. Subsequently, the root canal can easily be filled in with a bioceramic sealer using the matched cone technique.

Keywords: Curved root canal, Non-superelastic shape memory Ni-Ti rotary file, Matched cone technique

Author(s): Makoto OBATA

Affiliation: Legal Professional Corporation Obata Law Office

Title: Taking the preventive approach in today’s dental clinics : preventing patient- and staff-related problems

Abstract

In recent years, various kinds of trouble have been on the increase in dental clinics, and have been changed drastically in nature. Therefore, it is more important than ever before to take precautions against them. The preventive approach requires gaining an in-depth understanding of each contract, managing them appropriately and recording any required matters correctly. This is of prime importance in the ongoing achievement of managerial stability and a superior medical environment.

Keywords: Trouble prevention, Accountability, Rules of employment

The Journal of the Japan Dental Association

ENGLISH

2018

NO.1 April

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NO.3 June

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NO.5 August

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NO.7 October

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