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. 2023 May 17;93(5):591–602. doi: 10.2319/010923-18.1

Temporary anchorage devices in orthodontics: a bibliometric analysis of the 50 most-cited articles from 2012 to 2022

Martina Ferrillo a,, Ludovica Nucci b, Vittorio Gallo c, Alessandro Bruni d, Roberta Montrella d, Leonzio Fortunato e, Amerigo Giudice f, Letizia Perillo g
PMCID: PMC10575636  PMID: 37200455

Abstract

Objectives

To identify and analyze the 50 most cited articles on temporary anchorage devices (TADs) and investigate the achievement and development of scientific research about the topic through a bibliometric analysis.

Materials and Methods

On August 22, 2022, a computerized database search was performed to detect papers published in the scientific literature about TADs from 2012 to 2022. Metrics data were identified using the Incites Journal Citation Reports (Clarivate Analytics) data set. The Scopus database was used to obtain information on the authors’ affiliations, country of origin, and h-index. Key words were automatically harvested from the selected articles to implement the visualized analysis.

Results

From a total of 1858 papers screened by searching the database, a list of the top 50 most cited articles was created. The total number of citations collected by the 50 most cited articles in TADs was 2380. Among the 50 most cited articles on TADs, 38 were original research papers (76.0%) and 12 were reviews (24.0%). As shown by the key word–network analysis, Orthodontic anchorage procedure was identified as the larger node.

Conclusions

Findings of this bibliometric study showed an increasing number of citations for papers on TADs, accompanied by a simultaneous rise in scientific interest in this topic in the past decade. The present work identifies the most influential articles, emphasizing the journals, the authors, and the topics addressed.

Keywords: Temporary anchorage devices, Miniscrew, Skeletal anchorage, Bibliometric analysis, Network analysis

INTRODUCTION

Anchorage, defined as resistance to unwanted tooth movement, is the cornerstone of the orthodontic force system, and strategies for its control should be considered a significant factor in planning and achieving successful treatment.1 Evolving from the work of Roberts et al.2 on tissue response to orthodontic forces applied to restorative implants, orthodontic bone anchorage has attained widespread use in recent years and has had a major impact on treatment to provide intraoral anchorage, adding an entirely new scope for orthodontic practice.35

Orthodontic bone anchorage can be obtained through mechanically retentive devices, such as miniscrews and miniplates.6 Since these temporary anchorage devices (TADs) use osseous physical engagement for stability, osseointegration is neither expected nor desired, although studies have shown that a limited and variable level (10–58%) of osseointegration could occur.6,7 Therefore, the effectiveness of miniscrews is related to primary stability, which has become a major issue to be investigated. Several factors could be related to their permanency, such as bone thickness, oral hygiene, smoking, insertion site, miniscrew design factors, type of mucosa (keratinized and nonkeratinized), and other patient-related factors.6,8

TADs have been widely used in the orthodontic field in recent years because of their capability to reduce the need for patient compliance and increase the number of treatment options to better match esthetic and occlusal treatment goals.35

As a result, a significant increase in research activity has been observed over the past decade, in line with the growing number of publications, on TADs.4,5 The large number of publications creates difficulties for researchers in obtaining high-quality information, and bibliometric analysis is a mathematical and statistical method that assesses the interrelationships and impact of published papers within a specific scientific research area.9,10

Thus, despite the variety of research topics on TADs,38 bibliometric and visual analysis could help to identify the hot topics in this research field and the direction of scientific development in this specific field. Therefore, the aim of this study was to perform a bibliometric analysis of the 50 most cited papers to provide a clearer scientific scenario for physicians that might improve the clinical research on this orthodontic device.

MATERIALS AND METHODS

On August 22, 2022, an independent database search was conducted to find papers published in the scientific literature about TADs during the past 10 years (from 2012 to 2022). The following research query was developed: ((“orthodontic*” OR “orthodontic treatment” OR “orthognatic*”) AND (“TAD*” OR “temporary anchorage device*” OR “miniimplant*” OR “skeletal anchorage” OR “miniscrew*” OR “microimplant”)), and the Scopus database was searched (Elsevier BV, Amsterdam, The Netherlands).

Two reviewers independently screened the papers according to titles, abstracts, and full text to determine study eligibility. In case of disagreement, consensus was achieved through a third reviewer.

Using the Incites Journal Citation Reports (Clarivate Analytics), the following journal-based bibliometric parameters were collected: 2021 Journal Impact Factor (JIF); quartile of the Category “Dentistry, Oral Surgery & Medicine,” according to Web of Science Core Collection (when it was available); Eigenfactor Score; Normalized Eigenfactor; article influence score; 5-Year Journal Impact Factor (5-JIF); Immediacy Index.

Key words were automatically retrieved from the data set based on bibliographic data and used to create a cooccurrence network. Key words were counted using full counting, meaning that each co-occurrence link received the same weight. To eliminate repetition, two authors carefully reviewed and amended all of the terms to construct a bespoke thesaurus. VOSviewer (Centre for Science and Technology Studies, Leiden University, Leiden, The Netherlands) was used to map key words. The nodes represented the key words, the edges represented the key word association, and the distance between nodes generally reflected relationships among the nodes.

RESULTS

From the research query, 1858 papers were identified. After applying a limitation filter to find papers from 2012 to 2022, 1274 papers were obtained, which are listed from the most cited to the least cited paper in Table 1,1160 with the total number of citations collected being 2380. Thirty-eight were original research papers (76.0%), and 12 were reviews (24.0%). Ten of the reviews were systematic reviews (20.0%), of which 6 were with meta-analyses (12.0%). Among the original articles, 14 were prospective studies (28%), 8 were finite element analysis studies (16%), 5 were retrospective studies (10%), 4 were case reports (8%), 2 were in vitro studies (4%), 2 were randomized clinical trials (RCTs) (4%), and 3 were animal studies (6%). Figure 1 displays further details. The papers on TADs were published in 16 different scientific journals, and 9 (56.25%) were in the category “Dentistry, Oral Surgery & Medicine,” as depicted by Table 2.

Table 1.

The 50 Most Cited Articles Regarding Temporary Anchorage Devices (TADs)a


Ranking Position

Title

Authors

Journal

Total Citations

Year of Publication

Study Design
1 Failure rates and associated risk factors of orthodontic miniscrew implants: A meta-analysis11 Papageorgiou Spyridon American Journal of Orthodontics and Dentofacial Orthopedics 182 2012 Systematic review and meta- analysis
Zogakis Ioannis
Papadopoulos Moschos
2 Comparison of intrusion effects on maxillary incisors among mini implant anchorage, J-hook headgear and utility arch12 Jain Ravindra Kumar Journal of Clinical and Diagnostic Research 107 2014 Prospective study
Kumar Sridhar Prem
Manjula
3 Microimplant-assisted rapid palatal expansion appliance to orthopedically correct transverse maxillary deficiency in an adult13 Carlson Chuck American Journal of Orthodontics and Dentofacial Orthopedics 92 2016 Case report
Sung Jay
McComb Ryan
MacHado André Wilson
Moon Won
4 Nonsurgical miniscrew-assisted rapid maxillary expansion results in acceptable stability in young adults14 Choi Sunghwan Angle Orthodontist 78 2016 Retrospective study
Shi Kyung-keun
Cha Jung Yul
Park Youngchel
Lee Kee-joon
5 Non-surgical treatment of transverse deficiency in adults using microimplant-assisted rapid palatal expansion (MARPE)15 Brunetto Daniel Paludo Dental Press Journal of Orthodontics 77 2017 Case report
Eduardo Franzzotti Sant’Anna
MacHado André Wilson
Moon Won
6 Primary failure rate for 1680 extra-alveolar mandibular buccal shelf mini-screws placed in movable mucosa or attached gingiva16 Chang Chris Angle Orthodontist 63 2015 Retrospective study
Liu Sean Shih Yao
Roberts Wilbur Eugene
7 Orthodontic miniscrew failure rate and root proximity, insertion angle, bone contact length, and bone density17 Watanabe Hisako Orthodontics and Craniofacial Research 62 2013 Prospective study
Deguchi Touru
Hasegawa Masakazu
Ito Mau
Kim Sung-jin
Takano-Yamamoto Teruko
8 Effectiveness of orthodontic miniscrew implants in anchorage reinforcement during en-masse retraction: A systematic review and meta-analysis18 Antoszewska-Smith Joanna American Journal of Orthodontics and Dentofacial Orthopedics 59 2017 Systematic review and meta- analysis
Sarul Michał
Łyczek Jan
Konopka Tomasz
Kawala Beata
9 Stress distribution and displacement by different bone-borne palatal expanders with micro-implants: A three-dimensional finite-element analysis19 Lee Hye-kyung European Journal of Orthodontics 57 2014 Finite element analysis study
Bayome Mohamed
Ahn Chee Soo
Kim Seong-Hun
Kim Ki Beom
Mo Sung-Seo
Kook Yoon-Ah
10 Palatal bone thickness compared with cone-beam computed tomography in adolescents and adults for mini-implant placement20 Ryu Jun-ha American Journal of Orthodontics and Dentofacial Orthopedics 56 2012 Retrospective study
Park Jae-hyun
Vu Thi Thu Trang
Bayome Mohamed
Kim Yoonji
Kook Yoon-Ah
11 Outcomes and stability in patients with anterior open bite and long anterior face height treated with temporary anchorage devices and a maxillary intrusion splint21 Scheffler Nicole American Journal of Orthodontics and Dentofacial Orthopedics 53 2014 Prospective study
Proffit William
Phillips Ceib
12 Distalization pattern of the maxillary arch depending on the number of orthodontic miniscrews22 Bechtold Till Angle Orthodontist 52 2013 Prospective study
Kim Jinwook
Choi Tae-hyun
Park Youngchel
Lee Kee-joon
13 Does cortical thickness influence the primary stability of miniscrews? A systematic review and meta-analysis23 Marquezan Mariana Angle Orthodontist 51 2014 Systematic review and meta- analysis
Mattos Claudia Trindade
Eduardo Franzzotti Sant’Anna
De Souza Margareth Maria Gomes
Lucianne Cople Maia
14 Treatment effects of the Forsus fatigue resistant device used with miniscrew anchorage24 Aslan Belma Işık Angle Orthodontist 50 2014 Prospective study
Küçükkaraca Ebru
Türköz Çaǧri
Dinçer Müfide
15 Application of a new viscoelastic finite element method model and analysis of miniscrew-supported hybrid hyrax treatment25 Ludwig Björn American Journal of Orthodontics and Dentofacial Orthopedics 50 2013 Finite element analysis study
Baumgaertel Sebastian
Zorkun Berna
Bonitz Lars
Glasl Bettina A
Wilmes Benedict
Lisson Jörg Alexander
16 In vivo determination of aluminum, cobalt, chromium, copper, nickel, titanium and vanadium in oral mucosa cells from orthodontic patients with mini-implants by Inductively coupled plasma-mass spectrometry (ICP-MS)26 Martín-Cameán Ana Journal of Trace Elements in Medicine and Biology 48 2015 Prospective study
Jos Ángeles
Puerto María
Calleja Ana
Iglesias-Linares Alejandro
Solano-Reina Enrique
Cameán Ana María
17 Determinants for success rates of temporary anchorage devices in orthodontics: A meta-analysis (n > 50)27 Dalessandri Domenico European Journal of Orthodontics 48 2014 Systematic review and meta- analysis
Salgarello Stefano
Dalessandri Michela
Maiorana Carlo
Santoro Franco
18 Risks and complications of miniscrew anchorage in clinical orthodontics28 Kuroda Shingo Japanese Dental Science Review 47 2014 Review
Tanaka E
19 Finite element analysis of miniscrew implants used for orthodontic anchorage29 Liu Techun American Journal of Orthodontics and Dentofacial Orthopedics 47 2012 Finite element analysis study
Chang Chih-Han
Wong Tung-Yiu
Liu Jia-Kuang
20 Bone anchor systems for orthodontic application: A systematic review30 Tsui Wai Kin International Journal of Oral and Maxillofacial Surgery 46 2012 Systematic review
Chua Hannah Daile
Cheung Lim Kwong
21 Evaluation of optimal length and insertion torque for miniscrews31 Suzuki Makoto American Journal of Orthodontics and Dentofacial Orthopedics 42 2013 Prospective study
Deguchi Touru
Watanabe Hisako
Seiryu Masahiro
Iikubo Masahiro
Sasano Takashi
Fujiyama Koji
Takano-Yamamoto Teruko
22 Three-dimensional finite element analysis of strength, stability, and stress distribution in orthodontic anchorage: A conical, self-drilling miniscrew implant system32 Singh Shivani American Journal of Orthodontics and Dentofacial Orthopedics 42 2012 Finite element analysis study
Mogra Subraya
Shetty Vorvady Surendra
Shetty Siddarth
Philip Pramod
23 Miniscrews failure rate in orthodontics: Systematic review and meta- analysis33 Alharbi Fahad European Journal of Orthodontics 41 2018 Systematic review and meta- analysis
Almuzian Mohammed
Bearn David Russell
24 Nonsurgical correction of a Class III malocclusion in an adult by miniscrew-assisted mandibular dentition distalization34 Jing Yan American Journal of Orthodontics and Dentofacial Orthopedics 41 2013 Case report
Han Xianglong
Guo Yongwen
Li Jingyu
Bai Ding
25 Miniscrew design and bone characteristics: An experimental study of primary stability35 Migliorati Marco American Journal of Orthodontics and Dentofacial Orthopedics 41 2012 Animal study
Benedicenti Stefano
Signori Alessio
Drago Sara
Barberis Fabrizio
Tournier Henry
Silvestrini-Biavati Armando
26 Bone and cortical bone thickness of mandibular buccal shelf for mini-screw insertion in adults36 Nucera Riccardo Angle Orthodontist 40 2017 Retrospective study
Lo Giudice Antonino
Bellocchio Angela Mirea
Spinuzza Paola
Caprioglio Alberto
Perillo Letizia
Matarese Giovanni
27 Three-dimensional soft-tissue and hard-tissue changes in the treatment of bimaxillary protrusion37 Solem Richard Christian American Journal of Orthodontics and Dentofacial Orthopedics 40 2013 Prospective study
Marasco Richard
Guiterrez-Pulido Luis
Nielsen Ib Leth
Kim Seong-Hun
Nelson Gerald
28 Finite element analysis of the effect of force directions on tooth movement in extraction space closure with miniscrew sliding mechanics38 Kojima Yukio American Journal of Orthodontics and Dentofacial Orthopedics 40 2012 Finite element analysis study
Kawamura Jun
Fukui Hisao
29 Evaluation of miniscrew-supported rapid maxillary expansion in adolescents: A prospective randomized clinical trial39 Celenk-Koca Tugce Angle Orthodontist 38 2018 Randomized controlled trial
Erdinç Aslihan Ertan
Hazar Serpil
Harris Lacey
English Jeryl
Akyalçin Sercan
30 Evaluation of alveolar cortical bone thickness and density for orthodontic mini-implant placement40 Cassetta Michele Journal of Clinical and Experimental Dentistry 38 2013 Retrospective study
Sofan Aisha Ali Abdullah
Altieri Federica
Barbato Ersilia
31 Analysis of stress in bone and microimplants during en-masse retraction of maxillary and mandibular anterior teeth with different insertion angulations: A 3-dimensional finite element analysis study41 Jasmine M Issa Fathima American Journal of Orthodontics and Dentofacial Orthopedics 37 2012 Finite element analysis study
Arif Yezdani Arif
Tajir Faisal
Venu R Murali
32 Role of anatomical sites and correlated risk factors on the survival of orthodontic miniscrew implants: A systematic review and meta-analysis42 Mohammed Hisham Progress in Orthodontics 36 2018 Systematic review and meta- analysis
Wafaie Khaled
Rizk Mumen
Almuzian Mohammed
Sosly Rami
Bearn David Russell
33 Miniscrew-assisted rapid palatal expander (MARPE): The quest for pure orthopedic movement43 Suzuki Hideo Dental Press Journal of Orthodontics 36 2016 Review
Moon Won
Previdente Luiz Henrique
Suzuki Selly Sayuri
Garcez Aguinaldo Silva
Consolaro Alberto
34 Clinical factors correlated with the success rate of miniscrews in orthodontic treatment44 Topouzelis Nikolaos International Journal of Oral Science 35 2012 Prospective study
Tsaousoglou Phoebus
35 Gummy smile and facial profile correction using miniscrew anchorage45 Kaku Masato Angle Orthodontist 35 2012 Case report
Kojima Shunichi
Sumi Hiromi
Koseki Hiroyuki
Abedini Sara
Motokawa Masahide
FujFujita Tadashi
Ohtani Junji
Kawata Toshitsugu
Tanne Kazuo
36 Measurement of strain distribution in cortical bone around miniscrew implants used for orthodontic anchorage using digital speckle pattern interferometry46 Kumar Manoj Optical Engineering 34 2016 In vitro study
Agarwal Rupali
Bhutani Ravi
Shakher Chandra
37 Comparison of tooth displacement between buccal mini-implants and palatal plate anchorage for molar distalization: A finite element study47 Yu Il-Jun European Journal of Orthodontics 33 2014 Finite element study
Kook Yoon-Ah
Sung Sang-Jin
Lee Kee-Joon
Chun Youn-Sic
Mo Sung-Seo
38 Systematic review of mini-implant displacement under orthodontic loading48 Nienkemper Manuel International Journal of Oral Science 33 2014 Systematic review
Handschel Jörg
Drescher Dieter
39 Measurement of mini-implant stability using resonance frequency analysis49 Nienkemper Manuel Angle Orthodontist 33 2013 Animal study
Wilmes Benedict
Panayotidis Agamemnon
Pauls Alexander Harry
Golubovic Vladimir
Schwarz Frank
Drescher Dieter
40 Light emitting diode mediated photobiomodulation therapy improves orthodontic tooth movement and miniscrew stability: A randomized controlled clinical trial50 Ekizer Abdullah Lasers in Surgery and Medicine 32 2016 Randomized controlled trial
Türker Gökhan
Uysal Tancan
Güray Enis
Taşdemir Zekeriya
41 Comparison of two implant-supported molar distalization systems51 Şar Çaǧla Angle Orthodontist 32 2013 Prospective study
Kaya Burçak
Özsoy Onur Polat
Arman-Ozcirpici Ayca
42 Real-time cell analysis of the cytotoxicity of orthodontic mini-implants on human gingival fibroblasts and mouse osteoblasts52 Malkoç Sıddık Ik American Journal of Orthodontics and Dentofacial Orthopedics 32 2012 In vitro study
Öztürk Fırat
Öreki Bayram
Bozkurt Buket S
Hakkı Sema Sezgin
43 Effect of molar intrusion with temporary anchorage devices in patients with anterior open bite: A systematic review53 Alsafadi Ahmad Saleem Progress in Orthodontics 31 2016 Systematic review
Alabdullah Mohannad
Saltaji Humam
Abdo Anas
Youssef Mohamed
44 Effectiveness of maxillary protraction using a hybrid hyrax-facemask combination: A controlled clinical study54 Nienkemper Manuel Angle Orthodontist 31 2015 Prospective study
Wilmes Benedict
Franchi Lorenzo
Drescher Dieter
45 Comparison of stainless steel and titanium alloy orthodontic miniscrew implants: A mechanical and histologic analysis55 Brown Ryan N American Journal of Orthodontics and Dentofacial Orthopedics 31 2014 Animal study
Sexton Brent E
Gabriel Chu Tien-Min
Katona Thomas R
Stewart Kelton T
Kyung Hee-Moon
Liu Sean Shih-Yao
46 Implants for orthodontic anchorage: Success rates and reasons of failures56 Rodriguez Juan Implant Dentistry 31 2014 Systematic review
Suarez Fernando
Chan Hsun-Liang
Padial-Molina Miguel
Wang Hom-Lay
47 The ideal insertion angle after immediate loading in Jeil, Storm, and Thunder miniscrews: A 3D-FEM study57 Cozzani Mauro International Orthodontics 30 2020 Finite element study
Nucci Ludovica
Lupini Daniela
Dolatshahizand Hedieh
Fazeli Delaram
Barzkar Esmaeil
Naeini Ehsan
Jamilian Abdolreza
48 Use of shape correspondence analysis to quantify skeletal changes associated with bone-anchored Class III correction58 Nguyen Tung Angle Orthodontist 30 2014 Prospective study
Cevidanes Lucia
Paniagua Beatriz
Zhu Hongtu
Koerich Leonardo
De Clerck Hugo
49 Accuracy of miniscrew surgical guides assessed from cone-beam computed tomography and digital models59 Bae Mi-Ju American Journal of Orthodontics and Dentofacial Orthopedics 30 2013 Prospective study
Kim Ji-Young
Park Jong-Tae
Cha Jung-Yul
Kim Hee-Jin
Yu Hyung-Seog
Hwang Chung-Ju
50 Root proximity and cortical bone thickness effects on the success rate of orthodontic micro-implants using cone beam computed tomography60 Min Kyung-Inna Angle Orthodontist 30 2012 Prospective study
Kim Sang-Cheola
Kang Kyung-Hwaa
Cho Jin-Hyounga
Lee Eon-Hwaa
Chang Na-Younga
Chae Jong-Moon
a 

The articles are ordered by number of citations.

Figure 1.

Figure 1.

Study design of the 50 most cited papers on temporary anchorage devices.

Table 2.

Journals That Published the 50 Most Cited Articles About Temporary Anchorage Devices (TADs)a



Journal

2020 Journal Impact Factor

Quartile of the Category “Dentistry, Oral Surgery & Medicine”

Eigenfactor Score

Normalized Eigenfactor

Article Influence Score

5-Year Impact Factor

Immediacy Index

Number of Manuscripts

Citations
1 American Journal of Orthodontics and Dentofacial Orthopedics 2.711 Q3 0.00631 1.35013 0.742 3.345 0.579 17 915
2 Angle Orthodontist 2.684 Q3 0.00402 0.85966 0.749 3.212 0.683 13 563
3 European Journal of Orthodontics 3.131 Q2 0.00315 0.67349 0.799 3.166 1.000 4 179
4 Dental Press Journal of Orthodontics N/A N/A N/A N/A N/A N/A N/A 2 113
5 Journal of Clinical and Diagnostic Research N/A N/A 0.01121 2.39624 0.174 N/A N/A 1 107
6 International Journal of Oral Science 24.897 Q1 0.00411 0.88024 2.627 13.721 0.952 2 68
7 Progress in Orthodontics 3.247 Q2 0.00177 0.37987 0.866 3.782 0.220 2 67
8 Orthodontics & Craniofacial Research 2.563 Q3 0.00172 0.36768 0.590 2.599 0.626 1 62
9 Journal of Trace Elements in Medicine and Biology 3.995 N/A 0.00469 1.00240 0.567 4.001 0.863 1 48
10 Japanese Dental Science Review 6.468 Q1 0.00096 0.20590 1.079 5.862 0.594 1 47
11 International Journal of Oral and Maxillofacial Surgery 2.986 Q2 0.00795 1.69965 0.729 3.02 0.721 1 46
12 Journal of Clinical and Experimental Dentistry N/A N/A N/A N/A N/A N/A N/A 1 38
13 Optical Engineering 1.352 N/A 0.00643 1.37554 0.215 1.197 0.276 1 34
14 Lasers in Surgery and Medicine 4.025 N/A 0.00403 0.84511 0.767 3.881 1.241 1 32
15 Implant Dentistry 3.000 Q2 0.00195 0.41703 N/A N/A N/A 1 31
16 International Orthodontics N/A N/A 0.00067 0.14437 0.223 N/A N/A 1 30
a 

The journals are ordered by number of citations. N/A indicates not applicable.

DISCUSSION

This was the first bibliometric analysis of the 50 most cited articles on TADs. According to other comparable publications, the size of 50 articles was selected to have a sample size large enough to extract significant information and to graph with significant trendline data. The last 10 years were selected to increase clinical interest in looking at articles with newer protocols, with recognition of the rapid and recent evolution of this technique.61,62

The popularity of TADs has grown in recent years, supported by clinicians and researchers, confirming TADs as valuable tools. Despite the importance of reviews in supporting evidence about a specific topic, only 20% of the articles listed in the present work belong to that category. Secondary studies represent the apex of the research hierarchy, and consequently, they should be the best source for understanding a topic.63 Studies at the bottom of the evidence hierarchy (case reports, animal studies, in vitro studies, finite element analysis) can be found in the list, probably because the topic is relatively young and more time is required to improve the quality of the literature supporting it. Only 3 were RCTs, although this study design could provide the highest quality evidence, probably due to the cost and time required to carry out these types of scientific work.63

Number of Citations

The rate of citations per year has increased during the past decade. This trend in the total number of articles regarding the topic is depicted by Figure 2. It might be relevant to note that the use of citations per year as an indicator might reduce the bias caused by the time frame needed to collect citations related to older articles, considering that time could influence the ranking of article citations. Consequentially, dominant items on the list may be old studies, whereas high-quality, meaningful, and original papers published in recent years could be undervalued. In addition, the use of citations per year as an indicator may indicate that many high-quality articles were published during the decade 2012–2022 and that the quality of these papers has been increasing over the years. On the other hand, the phenomenon of obliteration by incorporation9,10,61,62 should be taken into consideration, which implies that historical scientific research is rarely cited, as the information provided becomes an integral part of clinical medical activity, and researchers may no longer feel the need to cite those studies.

Figure 2.

Figure 2.

Number of citations per year received by the 50 most cited papers on temporary anchorage devices.

Journals

The 50 most cited articles were published in 17 different journals, indicating heterogeneity in the source of scientific information regarding the topic. It is relevant to notice that 2 journals (American Journal of Orthodontics and Dentofacial Orthopedics and The Angle Orthodontist) collected the majority of the citations (n = 1478, 62.10% of the total amount of citations). This was in line with Bradford’s law, according to which, despite the large number of journals, most of the citations were collected by a few of them.9,10,61,62 This could have been due to many factors. First, multidisciplinary journals, such as medical and engineering journals, have often been awarded with higher journal metrics. Second, journals with a higher JIF often have a rate of publications extremely low and with very strict selection. In addition, some journals are renowned by clinicians and have a larger audience despite their measured scientific impact. Last, some of the journals are open access and promote distribution of published articles and their citations. Despite the higher publication fees often requested by open access journals, researchers are motivated to send their work to these journals due to the larger audience and wider dissemination of articles. Indeed, as reported by Hua et al.,64 open access papers should accelerate research, improve education, and benefit all researchers and practitioners, particularly those in low-income countries and resource-poor institutions.

Key Word Network Analysis

A key word map was built using the terms from the 50 most referenced articles about TADs (Figure 3). Key words are used to express the research field of hotspots; in addition, directions can be reflected in key word co-occurrence. The key word map showed Orthodontic anchorage procedure as the larger node, because this term has been the most used among articles, collecting 39 occurrences and 758 total link strengths. The clinical protocols for using TADs are undoubtedly one of the most relevant matters of focus by clinicians, considering the relatively recent introduction of skeletal anchorage in daily clinical practice.

Figure 3.

Figure 3.

Key word network analysis of the 50 most cited papers on temporary anchorage devices.

One of the most recurrent words was palatal expansion. Indeed, seven papers among the 50 most cited articles on TADs discussed miniscrew-supported rapid maxillary expansion, and one paper was on maxillary protraction using a hybrid hyrax-facemask combination. Scientific literature showed that bone-borne expanders increased the skeletal separation of the midpalatal suture, with a more parallel sutural opening and reduced buccal tipping of the maxillary first molars.15,39 In addition, the use of bone-borne palatal expanders has enabled midpalatal suture disjunction, even in the latter stages of suture maturation, reducing undesired dental effects related to these procedures in adolescents and adults.15,39

Looking at the co-occurrence maps, another recurrent word was palate, which is often selected as an extra-alveolar site for TAD insertion because of excellent bone quality and less possibility of root damage to the adjacent teeth. Considering the keratinized soft tissue and sufficient cortical bone, TAD placement in the paramedian palatal area has been recommended. However, it was reported that there was thinner bone in the early mixed dentition, compared with the late mixed and permanent dentition groups.20

Limitations

This study was not free from limitations. First, even if the number of total citations is an important indicator of the quality and attractiveness of an article, a certain amount of time is needed for a paper to accumulate citations. Therefore, using only the number of citations is not sufficient to determine the value of a paper. Indeed, high-quality but more recent articles may not have been identified. Second, there may have been a bias related to the presence of self-citations and the potential preference of some authors to cite articles from a specific journal. Third, the articles were identified only from Scopus. Last, the total citations of an article could have been affected by the journal level, and an article published in a journal with a high impact factor may have been more likely to receive more citations.

CONCLUSIONS

  • Taken together, findings of this bibliometric study showed an increasing number of citations for papers on TADs, highlighting an increasing interest in scientific research in the past decade on this topic in orthodontics.

  • Among the 50 most cited articles on TADs, 10 were systematic reviews, of which 6 had meta-analyses.

  • Starting from the analysis of the most cited articles on TADs in this field, researchers might improve the clinical research on this orthodontic device.

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