The utility of microbiome (microbiota) and exosomes in dentistry.

The concept of the oral-systemic link is important in both basic and clinical dentistry. The microbiome (microbiota) and exosomes are two prevalent issues in the modern medical researches. The common advent of oral and general microbiological investigation originated from the initial observations of oral bacteria within the dental plaque known as oral microbiome. In addition to oral diseases related to oral microbiome, the disruption of the oral and intestinal microbiome could result in the onset of systemic diseases. In the past decade, the exosomes have emerged in the field of the medical researches as they play a role in regulating the transport of intracellular vesicles. However, with the rapid advancement of exosomes researches in recent years, oral tissues (such as dental pulp stem cells and salivary gland cells) are used as the research materials to further promote the development of regenerative medicine. This article emphasized the importance of the concept of the oral-systemic link through the examples of microbiome (microbiota) and exosomes. Through the researches related to microbiome (microbiota) and exosomes, many evidences showed that as the basic dentistry developed directly from the assistance of the basic medicine, indirectly the progress of the basic dentistry turns back to promote the development of the basic medicine, indicating the importance of the concept of the oral-systemic link. The understanding of the oral-systemic link is essential for both clinicians and medical researchers, regardless of their dental backgrounds.

Ethnicity, gender, and geographical distribution of dentists in Taiwan in 1939 (Showa 14).

Background/purpose: Taiwan's dentistry entered into a new era of modernization and flourished during the Japanese colonial period. However, we know very little about the composition of dentists at that time. This study attempted to analyze the ethnicity, gender, and geographical distribution of dentists in Taiwan in 1939 (Showa 14). Materials and methods: The methods of documentary analysis and secondary data analysis were adopted to find the composition of dentists during the late Japanese colonial period through a name list of contract dentists for the Postal Savings Insurance published in August 1939 (Showa 14) by the Taiwan Government Transportation Department Information Bureau. Results: The total number of contract dentists was 368, accounting for 86.79% of the 424 practicing dentists in Taiwan in 1939 (Showa 14). Of the 368 contract dentists (328 males and 40 females), 225 (61.14%) were Taiwanese and 143 (38.86%) were Japanese. Among the 8 prefectures in Taiwan, Tainan Prefecture had the largest number of dentists (97), followed by Taipei (84) and Taichung (78) prefectures. The number of contract dentists per 100,000 people was 6.24, equivalent to 16,021 people served by each contract dentist in 1939 (Showa 14). The chi-square test for the trend analysis of gender distribution indicated a significantly higher proportion of male than female contract dentists in either Taiwanese or Japanese ethnic group. Conclusion: In the late Japanese colonial period, the number of Taiwanese dentists exceeded that of Japanese dentists. Furthermore, there were more male than female dentists in either the Taiwanese or the Japanese population.

The relationship between graduation school background and geographical distribution of dentists in Taiwan.

Background/purpose: Taiwan's eight dental schools are all located in the western region. This study attempted to analyze the relationship between the geographical distribution of dentists in Taiwan and their graduation school background and to develop several statistical indicators to analyze the geographical distribution of dentists. Materials and methods: The method of the secondary data analysis was adopted to collect the open information related to the number of the practicing dentists based on their graduation schools and practice locations by cities and counties in Taiwan in January 2023. The data were used to develop several statistical indicators to analyze the geographical distribution of dentists. Results: There were 16,533 practicing dentists in Taiwan in January 2023. Of the 16,533 dentists, 15,687 (94.88 %) graduated from domestic dental schools and 846 (5.12 %) graduated from foreign dental schools. For the school location, the coefficient of variation, Gini coefficient, population proportion index, and population density index were the largest (168.57 %, 0.47, 10.76 %, and 3927.01 people/square kilometer) in the dentists graduating from the northern dental schools. In overall, the dentists were concentrated in municipalities, cities, and the northern region of Taiwan, especially those graduating from the northern dental schools. Conclusion: In Taiwan, the geographical distribution of dentists is highly related to their graduation school background. Promoting a balanced distribution of dental enrollment quotas and dental student sources from different geographical locations and inducing the movement of dentists to the dentist-shortage areas may be the more feasible ways to solve the uneven geographical distribution of dentists in Taiwan.

Morbidity and mortality of oral cancer in Taiwan: Trends from 2000 to 2021.

Background/purpose: Oral cancer is a major cause of cancer morbidity and mortality worldwide, especially in Taiwan. This study investigated the morbidity and mortality of oral cancer in Taiwan from 2000 to 2021. Materials and methods: The population data and the records of cancer registry were obtained from the websites of the Ministry of the Interior and the Ministry of Health and Welfare, respectively. The numbers of oral cancer cases and deaths were analyzed from 2000 to 2021. Results: The numbers of oral cancer cases and deaths increased from 3378 to 1494 in 2000-8277 in 2020 and 3395 in 2021, respectively. The total increase of oral cancer cases was 4899 with a total increase rate of 145.03%, while the total increase of oral cancer deaths was 1901 with a total increase rate of 127.24%. The changes in the numbers of all cancer cases and deaths, as well as the morbidity and mortality of oral cancer or all cancers also showed similar trends. Furthermore, the death-to-case ratio of oral cancers decreased from 44.23% in 2000 to 40.84% in 2020. The total decrease was 3.39% with a total decrease rate of 7.66%. Conclusion: In Taiwan, people's awareness of oral mucosal health is still inadequate. Obviously, there is still much room for improvement in the oral mucosal health education for our people. With the expertise and responsibility for taking good care of oral health of our people, the dental personnel should take active roles in the prevention and screening for oral cancers.

Overview of dental professionally topical fluoride application in public health measure in Taiwan in 2021.

Background/purpose: In Taiwan, it has been 16 years since the policy of children's dental professionally topical fluoride application (PTFA) services was implemented. This study investigated the differences in the number of children's dental PTFA outpatient visits among cities and counties or different regions of Taiwan in 2021. Materials and methods: The population data and medical records of the number of children's dental PTFA outpatient visits were obtained from the websites of Ministry of the Interior and Ministry of Health and Welfare, respectively. The secondary data were divided by cities and counties to analyze the urban-rural gap and regional differences in the number of children's dental PTFA outpatient visits in Taiwan in 2021. Results: In Taiwan, municipalities had the largest number of dental PTFA visits (721,338, 66.91% of the total dental PTFA visits), while remote and outlying island counties had the smallest number of dental PTFA visits (84,509, 7.84%). The northern region had the largest number of dental PTFA visits (466,728, 43.29%), while outlying islands had the smallest number of dental PTFA visits (25,055, 2.32%). Based on the children aged 3-5 years, municipalities had the lowest dental PTFA use rate (171.70%), while remote and outlying island counties had the highest dental PTFA use rate (482.96%). Conclusion: In Taiwan, there is a higher number of children's dental PTFA outpatient visits in municipalities than in non-municipalities or remote and outlying island counties as well as in northern region than in each of other four regions (central, southern, and eastern regions and outlying islands).

Overview of dental education system and gender distribution of undergraduate dental students in Taiwan.

Abstract Background/purpose: The gender distribution of dentists in Taiwan has been dominated by male dentists for a long time. This study analyzed preliminarily the appearance of the current dental education system and the gender distribution of undergraduate dental students. Materials and methods: This study used documentary analysis and secondary data analysis to survey mainly the current dental education system and the gender distribution of undergraduate dental students in Taiwan. Results: There were a total of 2474 dental students and 394 dental graduates in Taiwan in 2021. The numbers of male students (1435, 58.00%) and male graduates (207, 52.54%) were higher than those of female students (1039, 42.00%) and female graduates (187, 47.46%). The numbers of male dental students in the northern (629), central (428), and southern (378) regions were all higher than those of female dental students (423, 373, and 243, respectively). The chi-square test indicated the significantly higher proportion of male dental students in the northern and southern regions (P < 0.01). Besides, there were a total of 15,857 registered dentists. The number of male dentists (10,997, 69.35%) was higher than that of female dentists (4,860, 30.65%). Compared with population, the chi-square test showed the significantly higher proportion of male dental students and male registered dentists (all P-values < 0.001). Conclusion: In Taiwan, the dental education system must promote female students' interest in dentistry and elevate the proportion of female dental supervisors to increase the proportion of female dental students and female dentists in the future.

Correlation between dental professionally topical fluoride application and children's dental use for dental caries under the National Health Insurance system in Taiwan from 2008 to 2021.

Background/purpose: Dental caries is one of the most common oral diseases in children worldwide, especially in Taiwan. This study investigated dental professionally topical fluoride application (PTFA) and children's dental use for dental caries under the National Health Insurance (NHI) system in Taiwan from 2008 to 2021. Materials and methods: The population data and medical records of the NHI system were obtained from the websites of the Ministry of the Interior and the Ministry of Health and Welfare, respectively. The dental PTFA services and dental use indicators for dental caries were analyzed from 2008 to 2021. Results: The number of out-patient visits for dental PTFA services increased from 221,675 in 2008 to 1,078,099 in 2021. The total increase of the out-patient visits was 856,424 with a total increase rate of 386.34%. The one-year increase was 65,879 with a one-year increase rate of 29.72%. Among the 3 age groups of children, their dental use indicators almost presented decreasing trends from 2008 to 2021. Moreover, in general, the dental use indicators showed a negative correlation with the number of the overall out-patient visits for dental PTFA services from 2008 to 2021. Conclusion: In Taiwan, there is a negative correlation between the dental use indicators in NHI system and the number of the overall out-patient visits for dental PTFA services from 2008 to 2021. However, the problem of dental caries in children is still serious and there is still a space for improvement in the oral health education for child caregivers and children.

Comparisons of histological features among primary oral squamous cell carcinomas before and after adjuvant chemotherapy and their lymph node metastatic cancer lesions after adjuvant chemotherapy.

BACKGROUND/PURPOSE: Adjuvant chemotherapy has been used to control the primary oral squamous cell carcinoma (OSCC) size prior to surgical excision of the cancer. This study aimed to explore the histological changes of primary OSCCs and their cervical lymph node metastatic cancer lesions after chemotherapy. MATERIALS AND METHODS: Thirty-three OSCC patients with eleven having cervical lymph node metastases received adjuvant chemotherapy before surgical excision of their cancer lesions. Hematoxylin and eosin-stained tissue sections of incisional biopsy, surgical excision, and cervical lymph node metastatic cancer lesion specimens were compared microscopically to observe the histological changes in the cancer tissues after chemotherapy. RESULTS: Common histological features could be found in the primary OSCCs and their cervical lymph node metastatic cancer lesions after chemotherapy. These included direct killing of cancer cells by chemotherapeutic agents, resulting in cancer cell necrosis and degeneration in the early phase, and squamous and keratinizing metaplasia of drug-induced cancer cells, leading to individual cell keratinization and keratin pearl formation in the later phase. There were also small nests of drug-resistant proliferating cancer cells in the inflamed fibrous connective tissue stroma. The most characteristic histological feature in the metastatic lymph nodes after chemotherapy was the keratinizing metaplasia of the metastatic cancer cells, resulting in the formation of epidermoid cyst-like lesions. CONCLUSION: Although the cancer reduces its size after chemotherapy, residual cancer cells are consistently present in the primary OSCC lesions after chemotherapy. Therefore, wide surgical resection of the cancer is still needed to ensure the complete removal of all cancer tissues.

Distributions of dentists and physicians in Taiwan during the Japanese colonial period from 1923 to 1924.

BACKGROUND/PURPOSE: In 1896, the first dentist opened his dental clinic in Taipei City and this also opened a new era of Taiwan's dentistry. This study tried to assess the dentist manpower in Taiwan during the Japanese colonial period from 1923 to 1924, and hence to explore the appearance of Taiwan's early dentistry. MATERIALS AND METHODS: This study utilized the secondary data analysis to evaluate the numbers and distributions of dentists, physicians, and local practitioners in Taiwan from 1923 to 1924, to find the relationship among them, and further to explore the development of dentists in Taiwan at that period. RESULTS: The total numbers of dentists and physicians increased from 87 to 882 in 1923 to 97 and 927 in 1924, respectively. Moreover, the total number of local practitioners decreased from 583 in 1923 to 558 in 1924. Their Gini coefficients for dentists, physicians, and local practitioners were 0.18, 0.16 and 0.20 in 1923 and 0.27, 0.05 and 0.19 in 1924, respectively. From 1923 to 1924, dentists and physicians were mainly concentrated in the northern and southern regions of Taiwan, and dentists had more serious uneven distribution problem. CONCLUSION: We conclude that the uneven distribution of dentist in Taiwan is an old problem. After a hundred years of development, the number of dentists increases at a higher rate than the number of physicians and there is no shortage of dentists to date in Taiwan. However, the problem of uneven distribution of dentists still exists and is even more serious now.

Overview of education system for oral hygienists in Taiwan.

Background/purpose: Currently, Taiwan has a very complete education system of oral hygiene, but there is still no licensing system for oral hygienists. This study explored mainly the profile of education system for oral hygienists in Taiwan from 2017 to 2021. Materials and methods: This study used the documentary analysis and secondary data analysis to survey mainly the development of oral hygiene education system in Taiwan, and the changes of oral hygiene students and graduates from 2017 to 2021. Results: In Taiwan, currently, there are 8 oral hygiene schools which offer associate, bachelor, and master degrees in oral hygiene. The oral hygiene enrollment quotas determined by the Ministry of Education increased from 343 quotas in 9 programs in 2017 to 500 quotas in 13 programs in 2021, while new oral hygiene students who completed registration increased from 282 students in 2017 to 353 students in 2021. The registration rate of the five-year training program of junior college was significantly higher than the other programs. The number of oral hygiene students with official student status increased from 604 students in 2017 to 1349 students in 2021. The total increase was 745 students from 2017 to 2021 with a total increase rate of 123.34%. Conclusion: In Taiwan, although the manpower of oral hygienists is important for public oral health, they usually work as dental assistants or change their careers. It is imperative to continue to promote the certification system for oral hygienists to improve the professionalism of this occupation.

Overview of dental assistants in Taiwan from 2009 to 2021.

Background/purpose: The development of dental assistants in Taiwan has been over a century. This study explored mainly the profile of dental assistants and the occupation survey about them in Taiwan from 2009 to 2021. Materials and methods: This study used the documentary analysis and secondary data analysis to survey mainly the changes of manpower of dental assistants in Taiwan from 2009 to 2021, and the association of their wages with economic indicators. Results: According to occupation survey from government, the number of dental assistants increased from 4315 in 2009-7909 in 2021. When estimated based on the data of the United States showing 1.86 dental assistants per dentist, the estimated number of dental assistants increased from 21,113 in 2009 to 28,698 in 2020. Although the mean monthly wage of dental assistants increased from 22,127 NT dollars in 2009 to 26,795 NT dollars in 2021, the proportion of the mean annual wage of dental assistants to the gross domestic product per capita decreased from 47.43% in 2009 to 34.78% in 2021. Moreover, the proportion of the mean monthly wage of dental assistants to the basic monthly wage of labor decreased from 128.05% in 2009 to 111.65% in 2021. Conclusion: In Taiwan, although the manpower and work content of dental assistants are important for dentists, they usually work with a low wage from 2009 to 2021. It is imperative to continue to promote the certification system for dental assistants to improve the professionalism and the wage structure of this occupation.

Oral medicine education for medical students - A retrospective evaluation of the course in MacKay Medical College from 2016 to 2021.

Background/purpose: The oral medicine education for medical students is very important and a necessary part for the comprehensive medical education. The purpose of this study was to evaluate the oral medicine course for medical students by evaluating students' perspectives and the instructor's observation. Materials and methods: The medical students who took the compulsory course entitled "Introduction to Oral and Maxillofacial Medicine" in MacKay Medical College from 2016 to 2021 were invited to fill out the questionnaire for course satisfaction survey regarding their satisfied level with the course and their feelings about the instructors or suggestions, and the participatory observation was performed throughout the course activities and instructor-student interactions. Results: From 2016 to 2021, of a total of 268 medical students, 202 (75%) participated in the surveys. The results of the surveys and the instructor's observation showed that students satisfied with the course, and the course helped them to have a basic understanding of oral medicine. Moreover, all the mean scores and the rates of respondents who answered as agree for each item were 4.22-4.92 and 85%-100%, respectively. Conclusion: In this study, the oral medicine education for medical students contributed to an increase in students' awareness and understanding of oral health and dentistry. Considering the reported effectiveness of the course, students' satisfaction with the course content and teaching materials, and the instructor's teaching, this model of providing dental and oral health knowledge for the medical students may be a good one for further use in other medical institutions.

Dental manpower and treated dental diseases in department of dentistry, Taipei Hospital (the predecessor of National Taiwan University Hospital) in 1923.

BACKGROUND/PURPOSE: In 1906, there was a dental treatment room established in the department of surgery of Taipei Hospital to introduce modern dental services to Taiwan. It is undoubtedly the earliest hospital dentistry in Taiwan. This study tried to assess the dental manpower and treated dental diseases in Taipei Hospital, and hence to explore the appearance of Taiwan's early hospital dentistry. MATERIALS AND METHODS: This study utilized the secondary data analysis to evaluate the dental manpower and treated dental diseases of dental outpatients in the 27th Annual Report of Taipei Hospital (Taisho 12th year or 1923). RESULTS: Our results found that there were 3 dentists and one dental technician in the dental department of Taipei Hospital in 1923. These 3 dentists totally treated 3 inpatients and 1759 outpatients with 4511 outpatient visits (1959 for male patients and 2552 for female patients) in that year. Dental caries and retained root were the two most common dental diseases in Japanese and Taiwanese dental outpatients, and followed in a descending order by missing tooth, pulp necrosis, and pulpitis for Japanese outpatients as well as pulpitis, suppurative periodontitis, and acute or chronic periodontitis for Taiwanese outpatients. CONCLUSION: We conclude that the dentistry of Taipei Hospital in 1923 does have a modern form of dentistry with 3 dentists and one dental technician. Its dental patients are mainly Japanese and minorly Taiwanese. Moreover, the treated dental diseases are mainly tooth diseases for Japanese outpatients and both tooth and periodontal diseases for Taiwanese outpatients.

Correlation between the beverage serving activities and the dental use of health care resources of National Health Insurance for common oral diseases.

Background/purpose: : Taiwanese get use to drinking hand-shaken beverages. However, excessive sugar intake is strongly associated with the occurrence of dental caries. This study evaluated the correlation between the beverage serving activities and the dental use of National Health Insurance (NHI) for common oral diseases in 2016. Materials and methods: Data on the population, the beverage serving activities, and the dental records of NHI were obtained from the related websites of government. These data were divided by cities and counties to investigate the beverage serving activities and the dental use of NHI for common oral diseases in 2016. Results: In Taiwan, the value of beverage consumption per person had a moderate to high positive correlation with the dental use rate, the number of out-patient visits per 1,000 people, and the medical expenses per person for common oral diseases. For dental caries, diseases of pulp & periapical tissues, and gingivitis & periodontal diseases, their Pearson's r values were 0.52-0.61, 0.18-0.40, and 0.58-0.65, respectively. These results indicate that the higher the beverage consumption per capita, the higher the dental use per capita. Conclusion: There is a long-term benefit for oral health and systemic health through reducing or avoiding unnecessary excessive sugar intake. Therefore, from a cost-effectiveness viewpoint, Taiwan government should develop a better oral health care policy including a health education strategy of appropriate sugar intake to prevent dental caries and other non-communicable diseases in Taiwanese people.

A retrospective study of the admission ways in the School of Dentistry of National Taiwan University from 2000 to 2021.

Background/purpose: In Taiwan, dental schools have gradually become a popular choice for high school graduates to enter in the universities. This study mainly analyzed the various admission ways to enroll students into the School of Dentistry of National Taiwan University (SODNTU) from 2000 to 2021. Materials and methods: The data on the numbers of enrollees and those enrollees who had completed registration in the SODNTU from 2000 to 2021 were available online to the public and included in this study. Results: The total number of enrollees in the SODNTU over the past 22 years was 764 with an annual mean of 34.73. The registration rate ranged from 90.91% to 100% with a mean registration rate of 96.86% from 2000 to 2021. The examination admission, individual application admission, and numerous stars initiatives admission were the three main admission ways to enroll students into the SODNTU from 2000 to 2021 with a total of 662 enrollees (86.65% of a total of 764 enrollees). The number (proportion) of enrollees through examination admission showed a decreasing trend year by year from 26 (78.79%) in 2000 to 15 (45.45%) in 2021. On the contrary, those enrollees through individual application admission and numerous stars initiatives admission showed an increasing trend year by year from 4 (12.12%) in 2000 to 14 (42.42%) in 2021. Conclusion: Although the examination admission is still the predominant admission way, the individual application admission and numerous stars initiatives admission gradually play pivotal roles to enroll students into the SODNTU recently.

Dental technology of Taiwan during the Japanese colonial period.

Background/purpose: During the Japanese colonial period, the Taipei Hospital had already provided complete dental services with a fixed price per treatment. This study tried to compare the differences in the prices of various dental treatments between the Japanese colonial period and today. Materials and methods: This study used the "Dental Treatment Fees in the 27th Annual Report of Taipei Hospital (Taisho 12)" as the study materials to compare the differences in the prices of various dental treatments between the Japanese colonial period and today using the monthly salary of a novice elementary school teacher as an income benchmark. Results: A hundred years ago, the Taipei Hospital had already provided the dental treatments such as scaling and endodontic, operative dentistry, prosthodontic, and orthodontic treatments. Of these treatment items, the prices for prosthodontic and orthodontic treatments were more expensive. After a century of development, the costs of scaling and operative dentistry treatments dropped, while the costs of endodontic, prosthodontic, and orthodontic treatments increased. Conclusion: During the Japanese colonial period, Taiwan's dental treatment technology had already had the forms of modern dentistry with several dental specialties. At that time, the costs of dental treatments are quite expensive. Today's dental treatment items are more detailed and diverse. The health insurance system provides Taiwanese people with convenient and cheap general dental treatments such as scaling and treatments related to operative dentistry, endodontics, periodontics, and oral surgery. However, the costs of prosthodontic and orthodontic treatments increase and have to be paid by the patients themselves.

Dental education and special dental practitioner-cultivating system in Taiwan during the Japanese colonial period.

Background/purpose: During the Japanese colonial period, Taiwan had no dental school but had a medical school. This study explored the dental education and research activities in the medical school and special dentist qualification system in Taiwan during the Japanese colonial period. Materials and methods: This study analyzed the "related incidents and documents of dental education and research and dentist qualification system in Taiwan during the Japanese colonial period" and explored the dental education and research activities in the medical school and special dentist qualification system in Taiwan during the Japanese colonial period. Results: In 1914, Taiwan Government Medical School hired Dr. Kaname Ansawa, the earliest dental teacher in Taiwan, to teach dental courses in the medical school. In 1918, the "Theory of Dentistry" was considered to be the first independent "Dentistry" subject in the medical school. In 1936, the Faculty of Medicine of Taipei Imperial University listed "Dentistry & Oral Surgery" as an independent graduation examination subject. For dentist qualification system, a qualified physician who had finished dental courses and training could apply for a dental specialty license to work as a dentist. Taiwan Government Medical School (Dentistry) Research Department was the earliest department involved in the teaching and research of dentistry in the medical school and was also an educational institution for cultivating dental practitioners in Taiwan. Conclusion: In the Japanese colonial period, although no dental school was established in Taiwan, there were rich dental education and research activities in the medical school and a special dentist qualification system.

Development of dental education for medical students in Taiwan during the Japanese colonial period.

Background/purpose: During the Japanese colonial period, Taiwan had a medical school education system for cultivating physicians, but did not have a dental school education system for cultivating "real" dentists. In this investigation, we collected and analyzed the historical documents related to dental education to study the development of dental education for medical students in Taiwan during the Japanese colonial period. Materials and methods: This study mainly analyzed the changes in the development of dental education for medical students in Taiwan during the Japanese colonial period through the collection and sorting of relevant historical materials. Results: During each stage of Taiwan's medical education system in the Japanese colonial period, the medical school offered compulsory dental courses for medical students, including theory and clinical practice of dentistry. Although there was no specific dental subject included in the graduation examination, evidence showed that the content of dentistry was covered by the subject of Surgery in the examination. Moreover, Taipei Imperial University established the Medical Faculty in 1936. Its curriculum increased the weight of dentistry and added the "Dentistry & Oral Surgery" as a graduation examination subject, indicating the importance of dental education for medical students in that period. Conclusion: In the Japanese colonial period, although there was no dental school for cultivating dentists in Taiwan, there was still dental education for medical students to let them understand the Dentistry and to enable them to become dental practitioners. This can be regarded as a workaround in the medical and healthcare policy.

The current dental school admissions: An overview of the admission process and the geographical distribution of dental school enrollees in Taiwan.

Background/purpose: There is no specific admission system for dentistry in Taiwan. The aims of this study were to describe and analyze the current admission processes for entry into dental schools through the university admission system and to compare the geographical distribution of dental school enrollees. Materials and methods: All seven dental schools of general universities in Taiwan were included to analyze the admission protocols in 2019 and 2020. All data of dental enrollment quotas and dental school enrollees presented in this study were collected from information available to the public on the related websites. Results: The total dental enrollment quotas via the university admission system were 381 in 2019 and 397 in 2020. Those admitted via the special program for indigenous peoples and offshore island peoples were both 27 in 2019 and 2020, respectively. The main dental school admission way was individual application, and the main providers of dental enrollment quotas were northern dental schools and private dental schools. In addition, dental school enrollees were concentrated in the northern region, municipalities, and cities in Taiwan. Conclusion: Further advancement is needed to expand participation and broaden the sociodemographic profile of dental school applicants. The dental schools would benefit from a long-term prospective study about the correlation of admission methods with students' performance in dental schools. The special program is impacting the equality of admission opportunities. It is necessary to track the practice dynamics of these dental school graduates who were enrolled via the special program as a basis for policy adjustment.

Comparison of past and current dental school curricula for dental students of National Taiwan University.

Background/purpose: The complete curriculum schedule of the School of Dentistry, National Taiwan University (NTU) appeared in 1960. This study aimed to understand the development of dental education in Taiwan by comparing the past and current dental school curricula of NTU. Materials and methods: This study collected the 1960, 1990 and 2020 dental school curriculum schedules for dental students of NTU from the related websites and used the documentary and secondary data analyses to further compare the obtained data. Results: The number of credits for all the curricula offered by NTU to undergraduate dental students decreased from 264 in 1960 to 243 in 1990 and further to 242 in 2020 with a total decrease of 22 credits by 8.3%. The number (proportion) of credits of medicine courses decreased from 102 (38.6%) in 1960 to 52 (21.4%) in 1990, and then increased to 60 (24.8%) in 2020, with a total decrease of 42 credits by 41.2%, while those of dentistry courses increased from 70 (26.5%) in 1960 to 122 (50.2%) in 1990 and further to 132 (54.5%) in 2020, with a total increase of 62 credits by 88.6%. Among them, clinical practice of dentistry had the greatest growth with a total increase of 42 credits by 233.3%. Conclusion: The increase of dentistry courses and the decrease of medicine courses are the general trends for modern dental education. The dental school of NTU has the ability to provide more refined dentistry courses to catch the world trend of dental education.