Citation classics in periodontology: a controlled study

Bibliometric Analysis of the 100 Most-Cited Articles on Periodontics in the Arab World

AIM

Periodontics is a branch of dentistry that deals with diseases of the supporting and investing structures of the teeth including the gingiva, cementum, periodontal ligament, and alveolar bone. The current study aimed to scrutinize the bibliometric indicators of the 100 most-cited articles on periodontics contributed by authors affiliated with the Arab countries.

RESEARCH METHODOLOGY

The bibliometric research method was used for the 100 most-cited articles retrieved from the Scopus database on May 9, 2023. The keywords periodontitis, periodontology, gingivitis, periodontal, gingiva, and periodontium were inserted, and then the Arab countries were selected from the country's filter. The 100 most-cited articles were accessed. The bibliometric indicators such as periodic distribution of articles, their study design, nature of research, contributed by different Arab countries, international research collaboration, and author's used keywords were analyzed. Microsoft Excel version 16 (Microsoft Corporation, Washington, United States), VOSviewer (Centre for Science and Technology Studies, Leiden University, The Netherlands), and SPSS Statistics version 27 (IBM Corp. Released 2020. IBM SPSS Statistics for Windows, Version 27.0. Armonk, NY: IBM Corp.) were used for data analysis.

RESULTS

A slow progress (4.50%) was found in periodontics literature before 2000 in the Arab countries, but a significant growth (75%) was recorded during the past 10 years (January 1, 2014, to May 9, 2023). The 100 most-cited articles on periodontics by the Arab countries were published from 1995 to 2021, and these articles gained citations with an average of 92.18 citations per articles. Case-control and review studies were the preferred study designs, and periodontology and implantology were the top two subject categories. About one-third of the articles were published in the Journal of Periodontology and the Journal of Clinical Periodontology. Saudi Arabia contributed the highest number of the most-cited articles, followed by Egypt and Jordan, but the articles contributed by the United Arab Emirates were the most influential. The United States and Germany were the top-ranked countries in international research collaboration.

CONCLUSION

The findings demonstrate that periodontics research increased remarkably during the past 10 years. Saudi Arabia stands not only on the topmost rank in overall research productivity in the Arab countries but also surpasses the rest of the Arab countries in the 100 most-cited articles. Saudi Arabia contributed 26 articles with the United States, while Jordan contributed the highest ratio of indigenous research.

The 100 most-cited articles in orthodontic journals in the last 20 years

INTRODUCTION

This study aimed to identify and analyze the 100 most-cited articles published in orthodontic scientific journals in the past 21 years.

METHODS

The research was conducted in the Thomson Reuters Web of Science data citation index, considering articles from 2000 to 2020 and the category of dentistry, oral surgery, and medicine. Information about the number of citations, citations per year, title, authors, year of publication, the title of scientific journals, type of study, keywords, and thematic field were extracted for each article. Descriptive statistical analyses were performed to evaluate the collected data. The Pearson correlation analysis was used to explore the relationship between publication and the number of citations received. The VOSviewer software (Leiden University Center for Science and Technology Studies, Leiden, the Netherlands) was used to generate the keyword cooccurrence network.

RESULTS

The number of citations of the 100 selected articles ranged from 122 to 547. The journal with the largest number of cited articles was the American Journal of Orthodontics and Dentofacial Orthopedics. Most of the papers were cross-sectional and longitudinal studies, and the most frequent thematic fields among the selected articles were anchorage, root resorption, and rapid maxillary expansion. Orthodontic treatment, anchorage, and root resorption were the most frequent keywords.

CONCLUSIONS

Bibliometric analysis of citations revealed a greater centralization of orthodontic studies. Most of the articles were published in a single journal and by one country. Anchorage is a trending topic in orthodontics, and cross-sectional and longitudinal studies are the most-cited types of papers.

Systemic Manifestations of the Periodontal Disease: A Bibliometric Review

This bibliometric review aimed to identify and analyze the top 100 most-cited publications on the systemic manifestations of periodontal disease (PD). A literature search was performed using the Web of Science (WoS) 'All Databases', without any restriction of language, publication year, or study design. Of 4418 articles, the top 100 were included based on their citation count. After downloading the full texts, their bibliometric information was extracted and analyzed. The citation counts for the top 100 articles ranged from 156 to 4191 (median 217). The most productive years were 2003 and 2005, with 20 articles on the list. Majority of the articles were published in the Journal of Periodontology (n = 25). The top 100 articles were generated primarily from the USA (n = 61). Most of the publications were clinical trials (n = 27) and focused on the cardiovascular manifestations of PD (n = 31). Most of the articles were within the evidence level V (n = 41). A total of 58 studies received funding and the most frequently used keyword in the top articles was "periodontal disease" (n = 39). The current citation analysis presents insights into the current trends in the systemic manifestations of periodontal disease.

A bibliometric analysis of the 103 top-cited articles in endodontics

Objective: The purpose of this study was to identify the 100 top-cited articles in endodontics and analyse their bibliometric characteristics. Material and methods: The Web of Science database was reviewed to identify the relevant articles. Results: One hundred and three articles were included because the last four articles had the same number of citations. The top-cited article received 2115 citations. The articles were published in 28 different journals, with the most popular publication being the Journal of Endodontics (n = 36). The most prolific country was the United States (n = 41), followed by Sweden (n = 17) and Switzerland (n = 8). The most prolific author and institution were M. Torabinejad (n = 12) and Umeå University (n = 9), respectively. The majority of articles were of a basic science nature (n = 55), while endodontic microbiology (n = 24) was the most frequent subspecialty. The most common study design used in clinical articles was non-randomized experimental study (n = 5). Half of the clinical articles (n = 11) had a level III evidence score. Conclusions: The present citation analysis provides insights into the historical progress and current trends in endodontics.

The 100 most-cited articles in orthodontics: A bibliometric study

OBJECTIVES:

To identify and analyze the 100 most-cited articles in orthodontics indexed in the Web of Science Category of "Dental, Oral Surgery and Medicine" from 1946 to 2016.

MATERIALS AND METHODS:

On hundred articles were identified in a search of the database of the ISI Web of Science and Journal Citation Reports, applying the truncated search term "orthodon*." Records were manually refined and normalized to unify terms and to remove typographical, transcription, and/or indexing errors.

RESULTS:

The 100 most-cited articles were published between 1946 and 2012, with numbers of citations ranging from 115 to 881. Of the 251 authors participating, 87.65% published a single work, while three authors published four works. Most of the authors with several citations were from the United States, although the University of Oslo produced the highest number of frequently cited works. Most of the articles were clinical studies, and the most frequently cited topic was mini-implants. It was noted that self-citation could be a potential cause of bias in bibliometric analysis.

CONCLUSIONS:

This bibliometric citation analysis reveals new, useful, and interesting information about scientific progress in the field of orthodontics.

Trends in Contemporary Orthodontic Research Publications: Evaluation of Three Major Orthodontic Journals

Background

In this study, we aimed to evaluate the inclination of orthodontic research published in original articles in three of the most popular and recognized orthodontic journals with high impact factor; American Journal of Orthodontics and Dentofacial Orthopedics (AJODO), the Angle Orthodontist (AO), and European Journal of Orthodontics (EJO) published in a 5-year duration time frame (2010–2014).

Materials and Methods

Online search with supplementary hand searching was undertaken for original research articles in these three orthodontic journals from 2010 to 2014. Classification of data was completed autonomously by manual and direct appraisal of the manuscript of each journal.

Results and Conclusion

Three thousand one hundred and forty articles published in AJODO, AO, and EJO in the particular time period were selected, out of which 1783 original research study articles (56.78%) were appraised for classification in their various respective knowledge domains. AO (82.73%) and EJO (76.99%) were relatively more committed toward publication of research work in comparison to AJODO (34.55%). Research articles based on perception and questionnaires (12%), temporary anchorage devices (11%), cone-beam computed tomography (8%), invisible orthodontics (lingual orthodontics, clear aligners, esthetic brackets, and wires) (5%), and airway examination (5%) were the five most recurrently selected subjects of interest (41%) in these three journals during the observation period. The total number of research articles published in the three journals reduced statistically significantly in 2014 when compared to 2010.

Traditional or regenerative periodontal surgery?-a comparison of the publications between two periodontal journals over time

OBJECTIVES

The objective is to compare the amount and content of publications regarding traditional or regenerative periodontal surgery in the years 1982/1983 and 2012/2013 in two leading periodontal journals of North America and Europe.

MATERIAL AND METHODS

The search was carried out in the Journal of Periodontology and Journal of Clinical Periodontology. Four reviewers screened the articles and allocated the topics with respect to periodontal surgery. The distribution of articles with respect to traditional or regenerative periodontal surgery was then compared between the journals and the respective time periods.

RESULTS

Out of 1084 screened articles, 145 articles were included. Articles with periodontal surgery content amounted to 18% for the first time period and to 11% for the second time period. In the years 1982/1983, 7% of articles in the Journal of Periodontology and 8% in the Journal of Clinical Periodontology referred to traditional periodontal surgery, while 8% (Journal of Periodontology) and 5% (Journal of Clinical Periodontology) examined regenerative periodontal surgery. The distribution changed 30 years later, with 1% (Journal of Periodontology) and 3% (Journal of Clinical Periodontology) traditional periodontal surgery and 7% and 6% regenerative periodontal surgery content.

CONCLUSION

While the clinical need for traditional periodontal surgery remained, research in this important field decreased. Publications rather tended to focus on adjunctive regenerative measures.

CLINICAL RELEVANCE

Periodontal surgery with adjunctive regenerative measures is an established and well-documented clinical procedure. However, with respect to the dominance of horizontal bone loss in periodontally diseased patients, there is a need for ongoing research with focus on traditional periodontal surgery.

Finite Element Analysis Generates an Increasing Interest in Dental Research: A Bibliometric Study

Purpose:

The purpose was to provide a longitudinal overview of published studies that use finite element analysis in dental research, by using the SCI-expanded database of Web of Science^® (Thomson Reuters).

Material and Methods:

Eighty publications from 1999-2000 and 473 from 2009-2010 were retrieved. This literature grew faster than the overall dental literature. The number of publishing countries doubled. The main journals were American or English, and dealt with implantology. For the top 10 journals publishing dental finite element papers, the mean impact factor increased by 75% during the decade.

Results:

Finite elements generate an increasing interest from dental authors and publishers worldwide.

The 100 Most-Cited Human Cleft Lip and Palate–Related Articles Published in Dentistry, Oral Surgery, and Medicine Journals

Objective

To identify the 100 most-cited articles pertaining to human cleft lip and palate research published in dentistry, oral surgery, and medicine journals and to identify their principal bibliometric characteristics.

Design

Web-based bibliometric analysis.

Main Outcome Measure

The Web of Science was searched to identify the 100 most-cited clinical articles related to cleft lip and/or palate. Information was extracted with regard to total number of citations, number of authors, affiliations, year, and journal of publication, Medical Subject Headings, type of study, specific area of study. Trends in citations were assessed.

Results

The 100 most-cited articles identified received between 437 and 58 citations. The oldest was published in 1954 and the most recent in 2008. The number of authors ranged from 1 to 12, with an average of three authors per article. Most of the first authors were affiliated with institutions in the United States, with the most prolific institution being the University of Iowa. More than 70% of the studies appeared in The Cleft Palate–Craniofacial Journal. There was a significant negative correlation between average citations per year and time since publication ( P < .001); whereas, a significant positive correlation was observed between average citations per year and number of total citations ( P < .001).

Conclusions

The 100 most-cited articles in human cleft lip and palate research published in dentistry, oral surgery, and medicine journals are listed and characterized. This can be used as a potential knowledge base for specialists in training or to produce relevant knowledge defining the direction of future research.

Citation classics published in knowledge management journals. Part I: articles and their characteristics

Purpose

– The purpose of this study is to develop a list of citation classics published in knowledge management (KM) journals and to analyze the key attributes and characteristics of the selected articles to understand the development of the KM discipline.

Design/methodology/approach

– This study identifies 100 citation classics from seven KM-centric journals based on their citation impact reported by Google Scholar and analyzes their attributes.

Findings

– The KM discipline is at the pre-science stage because of the influence of normative studies espousing KM practice. However, KM is progressing toward normal science and academic maturity. While the discipline does not exhibit the signs of the superstar effect, scholars from the USA and UK have made the most significant impact on the development of the KM school of thought. KM scholars should be more engaged in international collaboration.

Practical implications

– Practitioners played a key role in the development of the KM discipline and thus there is an opportunity to develop more scientific research approaches based on critical and performative research agenda.

Originality/value

– The study is novel and a must read for KM scholars because it is the first to comprehensively analyze the ideas that are the origins of the KM discipline.

A historical review of classic articles in surgery field

BACKGROUND

Surgery is one of the most rapidly developing specialties in the past century. Diagnostic methods, operation technique, and knowledge of the diseases are changing continuously. In the academic history, lots of classic papers brought advances for surgery. They were accepted and cited numerously by the medical specialists all over the world. Citation analysis reflects the recognition a work has received in the scientific community by its peers.

DATA SOURCES

The articles in the field of surgery have been cited at least 1,000 times since its publication to 2011 were analyzed. By categorizing the publication year, journals, authors, institutions, countries, life citation cycles, level of evidence provided, and characteristics of the topmost articles, we intended to determine what qualities make the articles important to the specialty. The methodology used in this study was based on the Science Citation Index Expanded database of Web of Science from Thomson Reuters. According to Journal Citation Reports of 2011, it indexes 8,336 journals with citation references across 176Web of Science categories in science edition. Level of evidence of these articles was graded according to the standard provided by Oxford Centre for Evidence-Based Medicine.

CONCLUSION

Totally 36 articles have been cited at least 1,000 times since their publication to the year 2011. According to their citation histories, 35 articles were further evaluated. These topmost articles covered 8 subspecialties of surgery and were published in 17 journals. The publication year varied from 1940 to 1999 and the articles provided different level of evidence, most of which are retrospective studies of case series. Six articles were research articles including animal model, histology analysis, and laboratory research. The others were clinical articles. From the results of citation analysis, the classic articles are not always in top citations. In addition, some of these articles have no citations after several years post their publication. The introduction of a commonly used classification or scoring system is a major factor in propelling citation by other authors. The most cited articles in surgery present their long academic life in spite of their level of evidence and journal impact factor in which they were published.

Exploring the publications in three major orthodontic journals: a comparative analysis of two 5-year periods

OBJECTIVE

To analyze the types of articles and authorship characteristics of three orthodontic journals--American Journal of Orthodontics and Dentofacial Orthopedics (AJODO), The Angle Orthodontist (AO), and European Journal of Orthodontics (EJO)--published between 2008 and 2012 and to assess the differences in content within this period and an earlier period of 1998 to 2002.

MATERIALS AND METHODS

Each journal's content was accessed through the web edition. From each article, the following parameters were recorded: article type, number of authors, number of affiliations, source of article (referring to the first author's affiliation), and geographic origin. Descriptive statistics were performed and selected parameters were analyzed with the Pearson chi-square or Fisher exact test for independence at the .05 level of significance.

RESULTS

Review of differences between the two periods showed that the number of publications was almost double. The percentages of multi-authored articles increased. Fewer studies derived from the United States/Canada and European Union countries. Increases for articles from non-European Union countries, Asia, and other countries were found. Characteristics of the second period showed that the EJO and AO published more research articles, whereas the AJODO regularly published case reports and other articles. Approximately 75% of all studies derived from orthodontic departments.

CONCLUSIONS

The publications from 1998-2002 and 2008-2012 were significantly different both in terms of numbers and characteristics. Within 2008-2012 there were notable differences between the three journals concerning the type and origin of the publications.

Independent research of China in Science Citation Index Expanded during 1980-2011

The study explores the characteristics of China's independent research articles published from 1980 to 2011, based on the database of Science Citation Index Expanded. The publication outputs of seven major industrialized countries including Canada, France, Japan, Germany, Italy, the UK, and the USA were compared with China. Annual production, field performance, research emphases and trends, top articles, as well as main institutional and individual contributors by its top cited articles were analyzed. Some newly developed indicators related to words in title, author keywords, KeyWords Plus, first author, corresponding author, and Y-index were employed to provide in-depth information on topic and author contributions. Results showed that China has been closing the gap with the USA with the greatest growth, and has stood the second since 2006. Most top cited articles were published in 2000s, made up approximately seven tenths of total articles. Pronounced activities were found in chemistry and physics related categories. The core categories included multidisciplinary chemistry, physical chemistry, multidisciplinary materials science, and applied physics. Moreover, China's performance of nanotechnology and science, especially carbon nanotubes, nanoparticles, nanowires, and nanostructures showed dramatic growth. Six top articles with at least 1000 citations were examined, and were observed to concern medicine, nanotube, and adsorption. In addition, main contributing institutions and authors were also revealed and evaluated. Chinese Academy of Sciences played a dominant role, and Tsinghua University, Peking University and five universities in Hong Kong showed good scientific performance.

Citation classics in suicide and life threatening behavior: a research note

The number of citations a scholarly work receives is a common measure of its impact on the scientific literature; "citation classics" are the most highly cited works. The content of Suicide and Life-Threatening Behavior (SLTB) citation classics is described here. The impact of SLTB citation classics is compared to their counterparts in journals having published the most suicide papers. All data are from the ISI electronic venue on the Web of Science and refer to the number of citations the top 1% of works received in each of ten journals from 1975 through August 10, 2011. Among all ten journals, SLTB ranked first in the number of works on suicide. The principle theme of half of SLTB suicide classics was literature review. The median number of citations for SLTB citation classics (top 1%) was 121.5, with a range between 96 and 279 citations, but classics from generalized psychiatric journals received more citations as anticipated. Journal impact factors explained 73% of the variance in classic's citation counts across journals. On average, suicide classics received 30% more citations than all classics. Among a second group of five specialized suicide journals, however, SLTB ranked first in average 5-year impact. Although SLTB produced the highest number of suicide articles of any journal, SLTB's citation classics received fewer citations than suicide classics in high-impact/prestige, general journals. Future work is needed to assess what predicts which SLTB articles ultimately become citation classics.

The 100 top-cited articles in orthodontics from 1975 to 2011

OBJECTIVE

To identify the 100 top-cited articles published in orthodontics journals and to analyze their characteristics to investigate the achievement and development of orthodontics research in past decades.

METHODS AND MATERIALS

The Institute for Scientific Information Web of Knowledge Database and the 2011 Journal Citation Report Science Editions were used to retrieve the 100 top-cited articles published in orthodontics journals since 1975. Some basic information was collected by the Analyze Tool on the Web of Science, including citation time, publication title, journal name, publication year, and country and institution of origin. A further study was then performed to determine authorship, article type, field of study, study design, and level of evidence.

RESULTS

The 100 target articles were retrieved from three journals: American Journal of Orthodontics and Dentofacial Orthopedics (n  =  74), The Angle Orthodontist (n = 15), and European Journal of Orthodontics (n  =  11). Since 1975, the articles cited 89 to 545 times mainly originated from the United States, and the overwhelming majority of articles were clinical. The most common study design was case series; 40 articles were classified as level IV and 12 as level V evidence.

CONCLUSIONS

The 100 top-cited articles in orthodontics are generally old articles, rarely possessing high-level evidence.

Top-cited articles in endodontic journals

INTRODUCTION

The purpose of this study was to identify the 100 top-cited articles published in journals dedicated to endodontology and analyze their characteristics to describe the quality and evolution of research in the field of endodontology.

METHODS

The Institute for Scientific Information Web of Knowledge Database and the Journal Citation Report Science Editions were used to retrieve the 100 most cited articles published in journals dedicated to endodontics. The top-cited articles were selected and analyzed with regard to journals, authors, institution, country of origin, publication title and year, number of citations, article type, study design, level of evidence, and field of study.

RESULTS

The top 100 articles were cited between 87 and 554 times. These articles appeared in 4 different journals, with more than half in the Journal of Endodontics, followed by the journals Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology, the International Endodontic Journal, and Endodontics & Dental Traumatology. Forty-eight articles were published between 1990 and 1999. All articles were published in English and primarily originated from the United States (n = 52). The majority of articles were basic science articles (n = 55), followed by clinical research studies (n = 28) and nonsystematic reviews (n = 17). Uncontrolled case series with level IV of evidence and narrative reviews with level V of evidence were the most frequent types of study design. The main topics covered by the top-cited articles were microleakage and endodontic microbiology.

CONCLUSIONS

This analysis of citation rates reveals useful and interesting information about scientific progress in the field of endodontics. Basic research and observational studies published in high-impact endodontic journals had the highest citation rates.

Amusing titles in scientific journals and article citation

The present study examines whether the use of humor in scientific article titles is associated with the number of citations an article receives. Four judges rated the degree of amusement and pleasantness of titles of articles published over 10 years (from 1985 to 1994) in two of the most prestigious journals in psychology, Psychological Bulletin and Psychological Review. We then examined the association between the levels of amusement and pleasantness and the article's monthly citation average. The results show that, while the pleasantness rating was weakly associated with the number of citations, articles with highly amusing titles (2 standard deviations above average) received fewer citations. The negative association between amusing titles and subsequent citations cannot be attributed to differences in the title length and pleasantness, number of authors, year of publication, and article type (regular article vs comment). These findings are discussed in the context of the importance of titles for signalling an article's content.