bluuebunny/crossref_metadata_2025 huggingface dataset:
Infectious diseases after tooth extraction
Authors: Shin Kyung Su , Park Won-Jong
Published: July 2024

Infectious diseases are major complication following tooth extraction. Most infectious diseases can be treated relatively simply with proper treatment. However, infectious diseases that have not been diagnosed early can cause life-threatening complications. The purpose of this review is to introduce typical infectious diseases following tooth extraction and to provide with background knowledge for early diagnosis and appropriate treatment for clinicians.
Sclerotherapy for Oral Vascular Malformation : case series
Authors: Shim Woo-Chul , Yang Seog-Hwan , Cho Jin-Yong
Published: July 2024

Vascular malformations are structural abnormalities in blood vessels with normal endothelial cell turnover, and are known as one of vascular abnormalities along with hemangiomas. Vascular malformations can occur anywhere in the body and are relatively rare in the oral cavity. It presents symptoms such as bleeding, pain, and swelling, and can cause functional and aesthetic problems. Treatment methods for vascular malformations include surgical excision, Nd:YAG and CO2 laser therapy, embolization and sclerotherapy. In this study, three cases of vascular malformations in the soft tissues of the oral cavity were identified. We report three cases who were simply treated using sclerotherapy with a review of the literature. Sclerotherapy using a sclerosant showed successful results, and known complications were not observed. In properly selected patients with vascular malformation, sclerotherapy can be considered as the first treatment.
Systemic effects of oral appliance treatment for sleep related breathing disorders
Authors: Kim Hee-Young , Park Ji Woon
Published: July 2024

Sleep related breathing disorders (SRBDs) are a spectrum of diseases characterized by difficulties in airflowduring sleep. Central sleep apnea, obstructive sleep apnea (OSA), sleep-related hypoventilation, and hypoxemiadisorder are included in this disease entity. OSA is known to be the most common SRBDs and studies show its significant correlation with general health issues including hypertension, arrhythmia, diabetes, and metabolicsyndrome. The relationship between cardiovascular risk and OSA is especially significant with systemic inflammation, intermittent hypoxia, and increased oxidative stress considered as the underlying mechanism. Previous studies show that oral appliance treatment for OSA has a positive impact on lowering blood pressure and such an effect is non-inferior to that of continuous positive airway pressure therapy. More recent studies also support the favorable effect of oral appliance treatment for OSA patients in the aspect of endocrine, psychologic disorders, and cogni-tive function. Furthermore oral appliance treatment for OSA is known to improve the overall quality of life and daytime sleepiness levels of the patient.The dentist who is experienced in dental sleep medicine can easily identify patients with the risk of OSA andprovide appropriate treatment. The dentist should play an important part in the diagnosis and treatment of OSAwhich is inevitably connected to the well-being of the patient and better treatment results for various conditions. So the objective of this article is to assist dental professionals in gaining knowledge and insight of the systemic effects of oral appliance treatment for OSA.
Surgical Treatments for Velopharyngeal Insufficiency in Patients with Cleft Palate
Authors: Park Young-Wook
Published: July 2024

The velopharyngeal mechanism is a muscular valve extending from the posterior bony palate to the posteriorpharynx, which congenitally disrupted in cleft palate deformity. Velopharyngeal insufficiency(VPI), definedas the inability to completely close the velopharyngeal sphincter that separates the oropharynx and the naso-pharynx. Despite primary palatoplasty, VPI can be remained and cause the problems of so called “cleft palate speech”. To treat the cleft palate speech, surgery plays an definitive role in combined with the speech therapy.In this paper, the author introduces various surgical methods of pharyngoplasty and their clinical significanceswith appropriate cases.
Long-term Stability of Maxillary Protraction Orthopedic Treatment Using Facemask in Cleft Lip and Palate Patients
Authors: Yang Il-Hyung
Published: July 2024

Cleft lip and palate is one of the most frequent craniofacial deformities impacting the patients' life from birth.Multidisciplinary treatments given by the team approach is necessary to resolve many problems. One of the treatments challenging to the team is orthopedic treatment for protracting maxilla during the period of growth.Conventional way of maxillary protraction is using facemask with intraoral appliaces such as bonded expander,labiolingual arch, and so on. Despite the efforts of the clinicians, it has been well known to have not so good prognosis for the orthopedic treatment. Recently, with the help of skeletal anchorage, better effectiveness and ef-ficiency in maxillary protraction using facemask has been reported. Therefore, it is worth seeking its clinical ap-plicability and prognosis through clincial cases and literature reviews especially for cleft lip and palate patients.
Dentistry and Speech Therapy : From Multidisciplinary to Interdisciplinary Collaboration
Authors: Choi Seong-Hee
Published: July 2024

Recently, the importance of a team approach in dentistry and speech lanauge pathology has been emphasized.The two fields of dentistry and Speech-Language pathology differ in curriculum, training, and practice, but have something in common with the stomatognathic system, which governs the function of mastication, swallowing,and speech production. Therefore, identifying clinical areas where dentistry and speech therapy can collaborate and establishing a co-operative framework will enable patients to receive integrated, consistent evaluation and treatment and provide effective and best results. This study mentioned roles and importance in the area of experts in both fields and discussed team approaches that can interact with them.
Physical and chemical properties of double-layers adhesive polymer film supplemented with 5% NaF
Authors: Jih Myeong-Kwan , Lee Sang-Ho , Lee Nan-Young
Published: July 2024

Objective: To improve the remineralization effect of fluoride adhesion film, we developed a double-layers adhesive film, and then evaluate its physical properties and fluoride-releasing ability.Methods: The tensile strength, elongation, dissolution rate and fluoride-releasing capacity characteristics of the adhesive films were analyzed.Results: There was no variation in thickness among the adhesive films. The tensile strength was highest in the polyvinyl alcohol (PVA) adhesive film and lowest in the pullulan adhesive film. The elongation rate was highest in pullulan film, followed by PVA-pullulan film and PVA film. Com-pared with the PVA adhesive film, the double-layer adhesive film exhibited higher fluoride ion emission for up to 60 minutes. Adhesive films had greater fluoride ion emission than fluoride varnish after 6 hours of application.Conclusion: The tensile strength and elongation characteristics of double-layer adhesive films were superior to those of single-layer adhesive films. PVA-pullulan double-layer adhesive film had very high initial fluoride ion emission compared with PVA adhesive film and fluoride varnish. This increased fluoride ion emission may compensate for the disadvantages of fluoride varnish and PVA adhesive film. The above results indicate that the PVA-pullulan double-layer adhesive film has improved physical properties and fluoride-releasing capacity compared with conventional PVA adhesive film.
Orthodontic treatment in patients with severe crowding in maxillary anterior teeth through various extraction patterns
Authors: Lim Yoen-Ah , Cho Ah-Ra , Kang Byung-Min
Published: July 2024

A palatally displaced maxillary lateral incisor is related to the lack of space in the maxillary arch, and extraction orthodontic treatment is required in many cases. This case report describes two adolescent patients with a palatally displaced maxillary lateral incisor treated with two different extraction patterns. In case 1, an 18-year-old female patient whose left mandibular first molar was planned to be extracted was treated by extraction of the first molars from the left and the first pre-molars from the right. In Case 2, a 16-year-old male patient with a gingival recession of the mandibular incisor was treated by the extraction of four incisors from both arches. A good functional occlusion was established in both cases as a result of treatment. In the treatment of palatally displaced maxillary lateral incisors, asymmetric extraction or removal of the incisors can be a good treatment option if the indication is selected properly considering the prognosis of the teeth, the condition of the prosthesis, and mucogingival conditions
Implementation of ubiquitous-based test (UBT) and students’ perceptions of UBT in dental education
Authors: Kim Jae-Hoon , Kim Hyeon-Cheol
Published: July 2024

The purpose of this survey was to explore dental students’ perceptions of the ubiquitous-based test (UBT) system that was applied to a trial dental licensure examination at a dental school.The fourth-year students of a dental school took a UBT and a paper-based test (PBT) which were administered in the format of the Korean Dental Licensure Examination. The UBT was conducted with a tablet computer with the face tracking function for preventing cheating. A survey was conducted online after the two exams ended. The questionnaire examined possession of a tablet computer, skillfulness of smart devices, the students’ perceptions about the convenience and satisfaction, reliability, and preference of UBT. The items related to the students’ perceptions were scored using a 5-point Likert scale. There were no statistically significant differences in overall perceptions of UBT by gender and possession of a tablet computer. In the convenience and satisfaction category, the convenience of viewing images received the highest mean score of 3.54 ± 1.17. The response to the reliability of exam results was positive (3.78 ± 1.31), whereas the reliability of the cheating preventing function received the lowest mean score (1.89 ± 1.12). The preference of UBT compared to PBT received a mean score of 2.36 ± 1.32. The disadvantages of UBT mentioned by the students included neck and eye fatigue, and difficulty concentrating on the exam. Some issues identified in this study can be helpful to improve the UBT system, and it will be a useful assessment tool that allows for variousmultimedia materials in dental education.
Clinical application of Er-YAG Laser for treatment of various oral mucosal diseases
Authors: Kang Chang-Dong , Lee Sang-Jae , Park In-sook , Kim Ji-Rak
Published: July 2024

Lasers are widely used in oral and maxillofacial surgery. Laser therapy is effective in sterilizing the surgical wound, resecting various types of lesions and tissues, promoting blood coagulation and hemostasis. In addition, the use of the laser tends to decrease postoperative swelling or scar formation and reduce operation time. ErYAG laser uses light in the range of 5~40nm wavelength. With its high absorption rate, the Er-YAG laser can be safely used on thin soft mucosal layers, with minimal thermal damage to adjacent tissues. We hereby report 4 cases of oral mucosal diseases which were successfully managed with Er-YAG laser under local anesthesia, and also introduce the advantages and clinical utility of the Er-YAG laser.
The longitudinal cephalometric study for positional change of maxillary and mandibular incisors according to three superimposition methods
Authors: Park Hyo-Seon , Oh Min-Hee , Oh Heesoo , Cho Jin-Hyoung
Published: July 2024

This study investigated the positional changes of maxillary and mandibular incisors during growth and the difference of positional changes accord-ing to the three superimposition methods.Lateral cephalographs including 10 subjects(7 males and 3 females) between 7-14 years old were used, which had been taken at University of California in San Francisco and kept at University of the Pacific. Four lateral cephalographs were selected based on chronologic age and development of dental occlusion. After tracing of cephalographs, superimposition was performed in three methods; based on cranial base, maxilla or mandible, and implants of maxilla and mandible. The repeated measure analysis of variance (ANOVA) and ANOVA with post-hoc analysis were performed. With growth, both maxillary and mandibular incisors showed changes in the anterior and downward directions, and the amount of positional changes was different according to the superimposition methods. As a result of comparing the changes of the upper and lower incisors according to three superimposition methods, the horizontal change of the upper incisor showed statistically significant differences between the three superim-position methods in all three periods. The change of the lower incisor showed a statistically significant difference only in the T3-T4 period, and no statistically significant difference in the other periods. In growing children, superimposition based on the facial bone shows that growth of the facial bones including the maxilla and mandible is contained together. This suggests that growth needs to be considered even when evaluating orthodontic treatment.
Craniofacial Growth Modification for OSA Children
Authors: Oh Seung-Wook , Kim Su-Jung
Published: July 2024

Pediatric sleep disordered breathing (SDB) includes snoring and obstructive sleep apnea (OSA) in growingchildren. Because diagnostic criteria and subjective symptoms of OSA in children differ from those in adults, different diagnostic and therapeutic approach is necessary. Based on the differential growth of craniofacial struc-ture and upper airway soft tissues, phenotype-based, timely-target intervention is needed to interrupt abnormal craniofacial growth inducing or aggravating SDB symptoms and ultimately to prevent the progression to adult-hood OSA. Although adenotonsillar hypertrophy is known to be first-line treatment in pediatric OSA patients, craniofacial growth modification treatment needs to be primarily considered for the patients with craniofacial skeletal phenotypic cause. Growth modification treatment can be categorized into four modalities dependingon the craniofacial target related to the upper airway collapsibility: 1) Unlocking the mandibular growth for skeletal Class II patients with retruded small mandible; 2) Nasomaxillary protraction for skeletal Class III pa-tients with deficient midface; 3) Nasomaxillary expansion for the patients with transverse discrepancy and nasalobstruction; 4) Control of vertical maxillary excess in patients with long face and structural mouth breathing.
The up-to-date techniques in managing sleep disorders
Authors: Cha Jung Yul , Sung Sang Jin
Published: July 2024

How reliable is the assessment of snoring apps in the medical field? Although research on this has beencontinuously reported, the authors would like to introduce points that dentists as sleep experts understand the functions and limitations of snoring apps and use them as screening tests for sleep diseases. We would also like to explore the latest treatments using ICT technology to increase patient compliance with oral devices to treat sleep disorders.
Facial nerve palsy following extraction of third molars : Case report
Authors: Park Hyun-Jun , Park Kwan-Soo
Published: July 2024

Peripheral facial nerve palsy is one of the most common cranial nerve disease. There can be multiple etiologies including trauma, infection, idiopathic conditions. In rare case, during dental treatment including extraction, peripheral facial palsy also can occur. Based on the time of onset and duration of the symptom, facial palsy could be classified on immediate or delayed. Immediate facial palsy is relatively common and mainly associated with the injection of local anesthetic. However, in case that onset of facial palsy and symptom are delayed, it is difficult to determine the pathogenesis. We report a rare case of delayed facial palsy as a complication of tooth extraction, which occurred 5 days after the tooth extraction and subsided in about 1 month and discuss the possible etiology and management.
The effect of agitation on the adhesion performance of dentin adhesives
Authors: Kim Duck-Su
Published: July 2024

Contemporary dentin adhesives show reliable adhesion performance regardless of their adhesion protocol.It is mostly attributed to the improved chemical composition of them. However, their performance can be also improved by various clinical techniques. “Agitation” is the most important technique among them. It is easiest and most useful technique in clinic. In addition, it can be used to all dentin adhesives. This manuscript describes various evidence for the agitation and provides its clinical guidance.
A Study of Dental Ethics Education Based on the Perceptions of Dentists
Authors: Lee Joo-Young , Lee Seung-Jong , Hwang Chung-Ju , Lee Cheol Gyu , Cho Nam Eok , Park Woohyun , Choi Inyoung , Kim Junhewk
Published: July 2024

Purpose: This study was designed to identify dentists’ perceptions of dental ethics education and to provide guidance on the direction of education.Method: A focus interview was planned, but due to restrictions of COVID-19, the research was conducted by written interviews. Based on the methodology of the consensus development program, the expert panel was invited as co-researchers and the result was circulated in the panel group to reach an agreement.Result: Through the interview, the purpose of dental ethics was identified as the acquisition of professionalism and nor-mative knowledge. Ethics education should go beyond content delivery and be reflected in student growth and evaluation across dental colleges. Afterward, future dental ethics should deal with issues of medical advertisements, artificial intel-ligence, and practice delegation.Conclusion: Based on the interview results, the paper presents a set of dentists’ virtue. Also, integrated dental ethics curriculum and dental ethics rounds were discussed as feasible alternatives to formal, didactic ethics lectures.
Dental treatment for patients with dental phobia
Authors: Cheong Ji-eun
Published: July 2024

Proper communication before procedure is key for treating patients with dental phobia. As dentists may facedifficulties treating dental phobic patients in a dental office, they may require other ways to alleviate anxiety and dental fear. Even if the treatment is a simple procedure in a dental office, thoughtful consideration must be given to these patients. Extremely anxious or dental phobic patients may require sedation or even general an-esthesia. Such cases will require proper preparation following sufficient communication with the patient before the procedure. Following the procedure, the dentist must provide thorough oral health education and preventivecare through regular dental appointments.
Multidisciplinary approach for management of cemental tear with apical periodontitis:
A case report
Authors: Sung Kun-Hwa , Cho Hye-Jin , Jo Hyung-Hoon , Park Tae-Young
Published: July 2024

Objectives: Cemental tear is a specific type of root surface fracture that can lead to rapid periodontal attachment loss. Tooth associated with cemental tear show mobility of tooth, resorption of alveolar bone, and inflammation that persists even after root canal treatment. Cemental tears are difficult to diagnose when characteristic fractures are not observed on radiographs, and often misdiagnosis as periapical or periodontal lesions. refore, an accurate diagnosis is essential for suc-cessful treatment of cemental tears and a multidisciplinary approach that involves both endodontic periodontal treatment, and periodontal surgery is required. The aim of this case report is to present the treatment and outcome of cemental tear which was managed with two differ-ent surgical treatment regimes. In the first case, after conventional endodontic treatment, cemental fragment was removed through open flap surgery, and regeneration treatment was performed by guided tissue regeneration (GTR) and bone graft. In the second case, after conventional endodontic treatment, apicoectomy and removal of cemental fragments were performed through replantation of tooth, followed by guided tissue regeneration (GTR) and bone graft. In both cases, follow-up of more than 6 months was performed, symptoms subsided and recovery of periapical alveolar bone was observed on radiographs.
Investigation of dental radiography examinations and effective dose of children and adolescents in Yonsei University Dental Hospital for 5 years
Authors: Kim Joo-Hee , Lee Chena , Kim Ik-Hwan , Lee Jaeho , Kang Chung-Min
Published: July 2024

Purpose: This study aimed to investigate the dental radiography status and radiation risk of children and adolescents for 5 years in Yonsei University Dental Hospital.Materials and Methods: The dental radiography database of individuals under the age of 18 years was provided by the electronic medical records (EMR) from Yonsei University Dental Hospital from 2015 to 2019. The type of dental radiography included panoramic radiography, periapical radiography, bitewing radiography, cephalometric radiography, cone-beam computed tomography and computed tomography. The number of dental radiographies and the effective dose per person was investigated.Results: For 5 years, panoramic and periapical radiography were taken the most. Panoramic radiography, periapical radiography, bitewing radiography, cephalometric radiography, cone-beam computed tomography and computed tomography were taken the most at the age of 5 – 7 years, 4 years, 18 years, 18 years, 18, 7 years and 10, 11 years respectively. As analyzed by department, the radiographs were taken the most in order of pediatric dentistry, orthodontic, conservative dentistry. The annual average of effective dose per person increased with age, and it was highest at the age of 18 years. But it was lower than 1.0 mSv, the annual standard of defense in the general public. The effective dose of over 80% of patients are under 0.1 mSv. But there were 2 patients whose effective dose was over 1.0 mSv. The annual average effective dose per person by dental radiography type was highest at the age of 0 – 3 years for periapical radiography and at the age of over 4 years for panoramic radiography.Conclusion: This investigation into the status of number of dental radiography and effective dose for individuals of children and adolescents will contribute to maximizing the benefits of dental radiography and minimizing the radiation dose.
ubjective evaluation of noise generated in a dental environment and comparison of sound insulation effects of noise cancelling earphones
Authors: Lee Minah , Kim Ik-Hwan , Lee Taeyang , Park Wonse , Song Je Seon
Published: July 2024

Purpose: Various devices such as dental handpieces, ultrasonic scalers, and aspirators exist in the dental clinic, and they generate noise with high decibel levels in a complex way. Through this study, we survey the discomfort and hearing changes on patients and dental staff, and compare and analyze the sound insulation effect of each noise cancelling product for vari-ous noises.Materials and Methods: This study is a multi-faceted evaluation of noise generated in the dental treatment. First, patients and dental staffs were surveyed through the Gallup Korea Research Institute. Afterwards, subjective evaluations of various noise cancelling earphones for dental noises were conducted by VAS scales.Results: In this study, more than 50% of patients, dentists, and dental hygienists feel uncomfortable about dental noise, and more than 70% of the respondents say that they had interrupted in communication due to noise. In both the dentist and non-dentist groups, when noise-cancelling earphones were used for high-speed and low-speed handpieces and suction noise, a decrease in VAS value was confirmed. Regarding the scaler noise, the increase or decrease of the VAS value was different depending on the products.Conclusion: The results of this study indicate that noise generated in a dental treatment can cause emotional discomfort to both patients and dental staff, and both are aware of the possibility of hearing impairment. And it is necessary to consider the sound isolation device optimized for each noise.
Detection methods for marginal mandibular branch of facial nerve: a literature review
Authors: Kim Hyun-Je , Kim Moo-Kyeong , Kim Dong-Hyuck , Song In-Seok , Lee Eui-Seok , Lim Ho-Kyung
Published: July 2024

Purpose: After orofacial surgery, some patients’ quality of life are lowered due to iatrogenic injury of the marginal mandibular branch (MMB). Therefore, methods that can localize and protect the MMB before or during orofacial surgery were reviewed through a literature review.Material and Methods: Total of ten documents were sourced through a PubMed search. Depending on the methods that can navigate the MMB, the studies were categorized into landmarks’ utilization, ultrasound scanning techniques, nerve stimulators, and fluorescent dye techniques.Results: In the cases of using landmarks, there were methods that used a layer with facial artery and facial vein. Also, the location of MMB inferred by making the triangle based on mouth commissure, sternocleidomastoid muscle, mandibular groove, mastoid, and mastoid apophysis. There was also a technique for visualizing an MMB via ultrasound scanning. The portable and disposable nerve simulator enabled an accurate MMB identification. Moreover, MMB mapping using a stimulator could help in the security and protection of the nerve during surgery. Finally, using a fluorescent dye (which is currently limited to animal study) could make visualization of MMB and micro branches.Conclusion: Most orofacial surgeries still rely on landmarks to search for the MMB. However, it is believed that damage to the MMB can be reduced by using the various techniques identified in this review paper in clinical practice.
Fabrication of Mouthguard in Patient with Severe Mouth Opening Limitation for Autoimmune Encephalitis before Electroconvulsive Therapy (Case Report)
Authors: Kim Ju-Sik
Published: July 2024

Mouthguards have been fabricated for protecting oral structures from outer forces. The best type of mouthguard is custom-made by dentists with impression technique. But boil-and-bite mouthguards have been also used, because of economic cause or difficulty in impression taking or emergency of the case. Author has found-ed that rigid boil-and-bite mouthguard can provide a suitable retention when it is moulded by dentist. There is a case that rigid boil-and-bite mouthguard was successfully used to provide mouth protection of a patient with severe mouth opening limitation due to autoimmune encephalitis during electroconvulsive therapy. In conclu-sion, the rigid boil-and-bite mouthguard moulded by dentist can be one of the effective treatment options when impression taking is difficult or mouthguard is urgently needed.
Clinical considerations for oral and maxillofacial surgery practice during the COVID-19 pandemic
Authors: Kwon Yong-Dae , Park Hong-Ju , Lee Bu-Kyu , Han Se-Jin , Kim Hyung Jun , Kwon Tae-Geon
Published: July 2024

In order to strategically respond to COVID-19, the most important measure is to control COVID-19 by minimizing the spread of the coronavirus and preventing related diseases and morbidity. In dental and oral maxillofacial surgery treatment procedures, it is unavoidable that the patient's saliva and blood are generated in the form of droplets or aerosols. Recently, new variants of COVID-19 virus had been reported and cause more infection and faster spread. The risk of breakthrough infection, which occurs even after vaccination, is increasing. Therefore, this recommendation was prepared to help prevent infection of oral and maxillofacial surgeons exposed to such environments, and to maximize the safety of patients and medical staff.
4th industrial revolution in Orthognahtic surgery
Authors: Park Jae-bong
Published: July 2024

Historically, the emergence of new technologies has had a major impact on industries as a whole. The field of orthodontic surgery was no different, especially with the advent of computers in the 20th century, oral andmaxillofacial surgeons and orthodontists were able to make more accurate and precise diagnoses, resulting inimproved results of double jaw surgery. In this manuscript, I will introduce some studies on how robots and artificial intelligence, which are said to be two new technologies in the era of the 4th industrial revolution, are being applied to the field of orthognathic surgery.
Comparison of accuracy of two indirect bonding methods using a jig fabricated from digital setup model
Authors: Lee Jong-Hyeon , Choi Dong-Song , Jang Insan , Cha Bong-Kuen
Published: July 2024

Aim: To evaluate the accuracy of indirect bonding using a jig fabricated from the digital setup model.Materials and Methods: Total 120 bracket jigs for the maxillary teeth were fabricated using computer-aided design and manufacturing (CAD/CAM) from 10 maxillary digital setup models. Brackets were bonded using the jigs on five models (Group 1), and using the jigs and additional vacuum tray on five models (Group 2). The models were scanned again and superimposed with each initial digital models for evaluation of bonding accuracy.Results: Indirect bonding using CAD/CAM jigs showed the average bonding error of ± 0.1 mm at linear measurement and ± 2.0°at angular measurement except labio-lingual inclination (3.36°) at the premolar of Group 1. The bonding accuracy were not statistically different between both groups.Conclusions: CAD/CAM jigs can transfer the bracket to the desired position regardless of whether additional vacuum tray is used or not, and this indirect bonding system provides clinically acceptable accuracy.
Induction of spontaneous eruption of displaced permanent teeth through space maintenance decompression of cystic lesion in pediatric patients
Authors: Lee Ga-Hyung , Kang Jae Hyun , Kim See Woon , Kim Bong Chul , Lim Hun Jun
Published: July 2024

Cystic lesions in pediatric jaws can cause eruption disorders by displacing the erupting permanent teeth, and in the case of secondary infection, can cause swelling and pain. The treatment modalities for such cysts include cyst enucleation, marsupialization, and decompression. As compared to enucleation, decompression has the advantage of preventing damage to surrounding tissues and inducing spontaneous eruption of permanent teeth.We report a case where decompression was performed using a stent designed for decompression and as a space maintainer in three patients with eruption disorder due to cystic lesion of the jaw. The eruption of the displaced permanent teeth was successfully induced by maintaining the eruption space and removing the cyst.
A study on the leakage of mercury vapor from pre-capsulated dental amalgam according to storage temperature
Authors: Kim Ji-Eun , Seo Young-Bin , Kwon Jae-Sung , Kim Kwang-Mahn
Published: July 2024

Objective: The aim of this study was to measure the amount of mercury vapor from one pre-capsulated dental amalgam according to the storage temperature and to investigate whether the storage temperature suggested by the manufacturer or ISO is appropriate for the storage.Materials and Methods: GK Amalgam and Ultracaps+ were used in this study. One pre-capsulated dental amalgam was placed in a Tedlar Bag and the Tedlar Bag was filled with 2 L of (4±2) ℃ air. The Tedler Bag was stored at one of the three different temperature conditions; (4±2) ℃, (23±2) ℃ and (30±2) ℃ for 24 hours. By applying Ontario hydro method, mercury vapor in the Tedlar Bag was oxidized in KMnO4-H2SO4 solvent and pre-treated, followed by analyses using the Cold Vapor Atomic Absorption Spectrophotometry. Five measurements were obtained from each group.Results: The average mercury vapor from GK Amalgam was (0.068±0.024), (0.300±0.100) and (0.544±0.133) mg/m3 , and Ultracaps+ was (0.026±0.008), (0.088±0.013) and (0.146±0.023) mg/m3 at (4±2) ℃, (23±2) ℃ and (30±2), respectively. There was a significant difference between GK Amalgam and Ultracaps+ at each temperature, and depending on the storage temperature in each material (p<0.05).Conclusions: It was evident that storage at (23±2) ℃ result in exposure of mercury vapor exceeding 340 to 1,170% of the expo-sure amount compare to the standard set by the Ministry of Labor in Korea. In order to reduce the amount of mercury vapor leaking from pre-capsulated dental amalgam, it is considered an effective method for users to periodically ventilate storage places, store them in refrigerators or keepin sealed container, and manufacturers to produce them in individual packaging.
Arthrocentesis and lavage in a patient with acute abscess of the temporomanibular joint from malignant external otitis and skull-base osteomyelitis: A Case Report
Authors: Shin Eun-Sup , Kwak Hyun-Jin , Kim So-Hyun , Choi Yu-Sung , Kim Bok-Joo , Kim Chul-Hoon , Kim Jung-Han
Published: July 2024

Arthrocentesis and lavage is a conservative method to treat temporomandibular joint disorders by discharging substances that cause inflammation and pain in the temporomandibular joint and resolving temporomandibular joint adhesions. The temporomandibular joint is susceptible to malignant external otitis and skull-base osteomyelitis due to its anatomical prox-imity. This case is a treatment of performing arthrocentesis and lavage in a patient with secondary acute abscess formation in the temporomandibular joint derived from primary skull-base osteomyelitis caused by malignant external otitis.
A review of dentist-related issues through Constitutional Court decisions
Authors: Ha Ji-Woo , Jung Won , Lee Kyung-Eun , Suh Bong-Jik
Published: July 2024

The Constitution is the supreme law of the Republic of Korea which defines the fundamental rights of Korean citizens and provides the establishment and operations of the government. When the public authorities infringe on someone's fun-damental rights guaranteed under the Constitution, the person directly involved can file a constitutional complaint to the Constitutional Court. Today, the possibility of conflict of fundamental rights is increasing with the increasing number of legislation or amendment of laws, and the development of social complexity and human rights awareness. Thus, we need to take an active interest in protecting our basic rights.In this article, we will present a brief explanation of the constitutional complaint and types of decisions of the Constitu-tional Court with some cases which affected dentists after the decisions of the Constitutional Court.
The Need for a Public Oral Health Platform and Dentist Perception Survey
Authors: Yang dong hyo , Kwon Hye-Jin , Jun sung won , Kim min hee , Kim kwang hyon , YI soon im , Lee Eung-Joo , Kim Young-Gwan , Min Bong-Gi , Chung Ho-Chung , Jeong Mi-Ri , Choi You-Sung , Cho Hyun-Jae
Published: July 2024

Purpose: To examine the current status and limitations of several healthcare platform cases and develop effective content and models for a public oral health platform through a survey of dentists.Methods: Survey on public platforms was conducted on 362 dentists belonging to the Gyeonggi Dental Association. The survey questions consisted of 4 questions on awareness of recent issues related to platforms, 4 questions on the need for platforms, and 9 questions on essential content for public platforms.Results: In the survey, 77.9% of dentists recognized the importance of public platforms. The main features that should be included in public platforms are "student oral examination function" and "dentist locator function". And 84.3% of respondents answer they would be willing to use a platform with these features.Conclusion: This study emphasizes the need for active participation in public platforms to offset the drawbacks of private platforms.
Considerations for esthetic and functional implants
Authors: Lee Dong-Woon
Published: July 2024

Dental implants that restore lost teeth are no longer a difficult choice. In past years, osseointegration and mar-ginal bone level stability were regarded as success criteria. However, clinicians and patients consider aesthetic requirements a critical success factor. Therefore, the review of literatures and cases was conducted from a surgi-cal point of view when placing implants for the long-term results with desired requirements.The author demonstrated that 1) appropriate 3D implant placement position (vertical position of depth and distance considering the attachment level of adjacent teeth; horizontal position considering the outer edge of the jaw bone), 2) appropriate bone width around the implant and surrounding gingiva (buccal bone, keratinized gingiva, thickness above the implant, vestibular depth) area needed for esthetic and functional implants.
Light-force orthodontic treatment using the minitube appliance and thin NiTi wire in children and adolescent: Case reports
Authors: Hwang Daeyoung , Choi Namki , Kim Seonmi
Published: July 2024

The mini-tube appliance (MTA) is comfortable and advantageous in terms of aesthetics and oral hygiene compared to conventional brackets. By using 0.012 inch Thermoactive (TA) NiTi wires, the frictional resistance is low. So treatment are possible within a short period and there are fewer side effects, such as root resorption. Light-force orthodontic treatment using MTA and thin TA NiTi wire is a suitable treatment method in pediatric dentistry, considering the increasing aesthetic needs and the nature of pediatric patients. By using the MTA and thin TA NiTi wire, the cases reported here have led to positive treatment outcomes in minor orthodontic treatment for the anterior teeth crowding and retreatment following relapse after orthodontic treatment.
The management of avulsed immature permanent teeth & primary teeth
Authors: Park Tae-Young , Cha Eui-jin , Jih Myeong-kwan
Published: July 2024

It is well known that avulsion among various dental traumas is difficult to treat and has a poor prognosis.When immature teeth with open apex are avulsed, the ideal treatment objective is spontaneous revascularization of the pulp. Replantation is not recommended in case of avulsion of primary teeth, but it is possible when all conditions are favorable.
A World Tour of Dental Paintings
Authors: Hoon Kweon
Published: July 2024

‘A picture is worth a thousand words.' In this short adage, the goal and desire achieved through this article focusing on the history of dentistry through paintings is contained. Past experience, whether direct or indirect, is an invaluable asset for dentists. In essence, the past teaches us vicariously, has historical lessons, and is a compass for the future. One of the attractions of art is that it helps people empathize. This is especially true of the power of painting. Even without words or explanations, paintings connect people from the past to modern times. Moreover, if you listen to an explanation of the historical significance of a particular painting, you discover a deeper understand-ing and connection to the events depicted. In this study, famous dental paintings in art museums from around the world will be introduced. In addition, the dental paintings will be considered and discussed as evidence of the life and times of famous painters of the past, and as related to dentistry in particular. We conclude the tour as experts of dental history paintings.
A Comparative Analysis of Business Performance between Dental University Hospitals and Medical University Hospitals
Authors: Lee Ji-Hoon , Choi Won-Jong , Kim Seong-Sik
Published: July 2024

Purposes: This study aims to compare financial performances and factors affecting profitability between dental university hospitals and medical university hospitals and suggest ways of improving dental university hospitals’ business performance.Methodology: Data from 2016 to 2019 was collected from financial statements, public open data in 8 dental university hospitals and 8 medical university hospitals. For the study, independent sample t-test for comparing mean difference and multiple regression for identifying factors affecting profitability were applied.Findings: There were significant mean differences between dental and medical university hospitals in current ratio, liabil-ity, long-term borrowings to total assets, employment cost rate, material cost rate, management expense rate, non-operating revenue rate, patient revenue per a specialist and an employee, outpatient revenue rate, patient revenue per a patient, patient revenue per a inpatient. Profitability of both hospitals were affected by employment cost rate, material cost rate, manage-ment expense rate.Practical Implication: To improve dental university hospitals’ business performance with research results, firstly, it needs to actively invest medical business with proper amount of current assets and borrowings. Secondly, it is necessary to extend non-operating business such as rental revenue, research grants, contribution income. Thirdly, it is required to analysis and manage their cost to build sustainable business environment.
Effect of phosphatase and tension homolog (PTEN) on periodontal complex
Authors: Kim Ye-hyun , Choi Wonjun , Xiong Ni , Lim Won Hee
Published: July 2024

Purpose: Phosphatase and tension homolog (PTEN) has been known to play a role of maintenance of homeostasis over the body. It is little known about the roles of PTEN in periodontal complex. The purpose of this study was to explore the role of PTEN in periodontal complexes after removing PTEN from osteoblasts and odontoblasts.Materials and Methods: The resulting OCN‐Cretg/+;Ptenfl/fl mice were created after by conditionally eliminating the PTEN gene using an Osteocalcin (OCN) Cre driver and the resulting OCN‐Cretg/+;Ptenfl/fl mice (experimental group) were compared with the wild type mice (control group) using micro-CT, histology and immunohistochemical analyses. The amount of dentin and alveolar bone was analyzed, and osteopontin and bone sialoprotein in the periodontal ligament space (PDL) were evaluated and collagen in the PDL was analyzed quantitatively and qualitatively.Results: Micro CT showed that dentin and bone were significantly accumulated in an experimental group. Dentin sialo-protein was significantly increase in dentin of an experimental group. Internal balance in the PDL was altered with increased expression of PCNA in an experimental group.Conclusions: Loss of PTEN causes an increase of dentin and bone in the periodontal complexes with an alteration of internal balance in the PDL. These findings underscore the effect of PTEN on homeostatic control of periodontal complexes.
Changes and key contents of cardiopulmonary resuscitation guidelines 2020.
Authors: Rhee Seung-hyun
Published: July 2024

Cardiopulmonary resuscitation guidelines are revised based on scientific evidence for emergency treatment of cardiac arrest patients. Refreshing the scientific knowledge of cardiopulmonary resuscitation leads to changes in the social-medical environment for cardiac arrest treatment. It aims to ultimately increase the survival rate of cardiac arrest patients by re-learning with changed guidelines every five years. Most emergency situations that occur to outpatients visits dental clinic are relatively low in risk. However, as the number of elderly patients is increasing and sedative anesthesia is becoming more common, life-threatening environments such as fainting, allergic shock, respiratory arrest, and cardiac arrest are increasing. As a medical practitioner, dentists should be able to provide appropriate emergency treatment. In this article, we would like to discuss the major changes in the revised Korean Association of Cardiopulmonary Resuscitation(KACPR) and American Heart Association (AHA) guidelines in 2020.
Clinical practice guidelines for diagnostic and procedural sedation
Authors: Karm Myong-Hwan
Published: July 2024

The American Dental Association states that the administration of local anesthesia, sedation and generalanesthesia is an integral part of dental practice. It is significant that the American Dental Association definessedation as well as local anesthesia as an integral part of dental practice. A new sedation guideline was published in Korea in 2022. This guideline has been published to help both anesthesiologists and non-anesthesiologists provide safe and effective moderate sedation to patients consistently, without limitation, at any medical institu-tion. This guideline was developed with a focus on moderate sedation before, during, and after examinations or procedures for diagnostic and therapeutic purposes. Considering that there is a possibility of transition from moderate to deep sedation depending on the drug administered and the characteristics of each patient, the guideline also includes items for monitoring and coping with complications that may occur due to cardiovascular and respiratory depression. It consists of recommendations for a total of 15 PICO (participants, intervention, comparator, outcome) questions. Individual items covered include education on sedation providers, requirements for supplying drugs and equipment for sedation, selection of appropriate patients, referral to an anesthesiologist when performing sedation for high-risk patients, fasting before sedation, and typical use in adults and children. Comparison of drugs, monitoring of respiratory system, cardiovascular system, depth of sedation during sedation, measures to cope with respiratory complications during sedation in children, and discharge criteria after sedation are included.
Early screening and treatment methods of pediatric sleep-disordered breathing(SDB) in dental office
Authors: Ong Seung-Hwan , Kim Young-Jae
Published: July 2024

Pediatric sleep-disordered breathing(SDB) is a common sleep disorder in children caused by obstruction of upper airway during sleep. It is often unrecognized early in life and causes various complications, including abnormal craniofacial growth and oral muscle dysfunctions. Dentist can play a significant role in managing SDB by early screening SDB risk factors and timely referring for diagnosis. SDB risk factors can be easily screened in dental office through medical history, sleep history, physical factors, sleep questionnaire, and cephalometric x-ray. In case of abnormal craniofacial development, rapid maxillary expansion, oral appliances, and myofunctional therapy can be used to reduce SDB symptoms and restore normal craniofacial development and muscular tones. Understanding continuous interaction between oral-facial muscle tone, maxillary-mandibular growth and development of SDB is important in managing pediatric SDB. The ultimate goal of pediatric SDB treatment is to change mouth breathing to nasal breathing, and a multidisciplinary approach in medicine and dentistry is necessary.
Orthodontic Treatment of Patients with Temporomandibular Disorders, Degenerative Joint Disease; Before, During and After Treatment Considerations
Authors: Ok Soo-min
Published: July 2024

Signs and symptoms of Temporomandibular disorder(TMD) may appear before, during, or even after orthodontic treatment. It is recommended for all patients who visit clinics for orthodontic treatment to check the presence or absence of symptoms through a simple TMD evaluation and inform them of the results in advance.Also, modifying the orthodontic treatment strategy depending on the presense of TMD is beneficial to patients.In patients with weak physiologic tolerance who initially have no signs or symptoms of TMD, signs or symptoms may develop if the temporomandibular joint complexes fail to adapt to the changes following orthodontic treatment. To this end, periodic TMD inspections should be continued throughout treatment period and appropriate medical interventions for the temporomandibular joint should be performed. In addition, patients should be informed that it may be necessary to receive TMD treatment after stopping orthodontic treatment when TMD symptoms occur during orthodontic treatment, and that orthodontic treatment can be resumed when symptoms improve.