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Anna C, Frank L, Eleonora C, Alessandro B, Luca L, Matteo P, Daniele M. Effects of orthodontic aligners on the ecological report of awake bruxism. J Oral Rehabil 2024. [PMID: 39030849 DOI: 10.1111/joor.13810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 06/25/2024] [Accepted: 07/08/2024] [Indexed: 07/22/2024]
Abstract
BACKGROUND The demand for orthodontic treatment with aligners has recently increased, but their effects on awake bruxism (AB) behaviours have to be evaluated yet. OBJECTIVES This investigation assessed if aligners can affect oral behaviours (i.e. tooth contact, teeth clenching, teeth grinding and mandible bracing) that are related with the AB spectrum. METHODS The investigation was performed in a sample of 32 consecutively recruited healthy adult patients who required orthodontic treatment. The study protocol involved three different sessions of 1-week monitoring without aligners, with passive aligners and with active aligners, respectively. All patients underwent an orthodontic treatment with aligners and used a smartphone-based application for a real-time report (i.e. ecological momentary assessment [EMA]) of their AB behaviours. Recording time was set from 8.00 to 12.30 and from 14.30 to 22.00. Analysis of variance (ANOVA) was used to compare the average reported frequency for each activity within and between the different sessions. The coefficient of variation (CV) was assessed to evaluate daily fluctuations within the 7 days monitoring periods. RESULTS The average reported frequency of the relaxed condition was 64.9%, 63.0% and 60.0% during the sessions without aligners, with passive aligners and with active aligners, respectively. ANOVA showed no significant differences in any of the AB behaviours within (i.e. between 7 days of evaluation) and between the monitoring sessions (i.e. before orthodontic treatment, with passive aligners, with active aligners). No sex differences were detected, except for the 'tooth contact' report that showed a higher frequency in females. CONCLUSION The impact of our results in the orthodontic field is not negligible; clinicians can find support for the hypothesis that from a global point of view, wearing or not wearing aligners (passive and/or active) does not influence the frequency of AB behaviours at the short term.
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Affiliation(s)
- Colonna Anna
- Department of Medical Biotechnologies, School of Dentistry, University of Siena, Siena, Italy
- Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy
| | - Lobbezoo Frank
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Capelli Eleonora
- Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy
| | - Bracci Alessandro
- Department of Neurosciences, School of Dentistry, University of Padova, Padova, Italy
| | - Lombardo Luca
- Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy
| | - Pollis Matteo
- Department of Medical Biotechnologies, School of Dentistry, University of Siena, Siena, Italy
| | - Manfredini Daniele
- Department of Medical Biotechnologies, School of Dentistry, University of Siena, Siena, Italy
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Mikami S, Yamaguchi T, Takahashi M, Kudo A, Saito M, Nakajima T, Maeda M, Saito T, Sakuma T, Takahashi S, Ishimaru T, Gotouda A. Examination of the relationship between masseter muscle activity during sleep and wakefulness measured by using a wearable electromyographic device. J Prosthodont Res 2024; 68:92-99. [PMID: 37005256 DOI: 10.2186/jpr.jpr_d_22_00231] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
Abstract
Purpose This study aimed to measure masseter muscle activity throughout the day in outpatients suspected of having awake bruxism (AB) and/or sleep bruxism (SB) and examine the relationship between AB and SB by comparing muscle activity during daytime wakefulness and nighttime sleep.Methods Fifty outpatients with suspected SB and/or AB participated in this study. A single-channel wearable electromyogram (EMG) device was used for EMG recording. The selected EMG bursts were divided into bursts during sleep (S-bursts) and bursts during awake state (A-bursts). The number of bursts per hour, average burst duration, and ratio of burst peak value to maximum voluntary contraction were calculated for both the S- and A-bursts. These values of the S- and A-bursts were then compared, and the correlations between them were analyzed. Additionally, the ratios of phasic and tonic bursts in the S- and A-bursts were compared.Results The number of bursts per hour was significantly higher for A-bursts than for S-bursts. No significant correlation was found between the numbers of S- and A-bursts. The ratio of phasic bursts was large and that of tonic bursts was small in both the S- and A-bursts. A comparison of the S- and A-bursts showed that the S-bursts had a significantly lower ratio of phasic bursts and higher ratio of tonic bursts than the A-bursts.Conclusions The number of masseteric EMG bursts during wakefulness did not show any association with that during sleep. It became clear that sustained muscle activity was not dominant in AB.
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Affiliation(s)
- Saki Mikami
- Department of Temporomandibular Disorders, Center for Advanced Oral Medicine, Hokkaido University Hospital, Sapporo, Japan
| | - Taihiko Yamaguchi
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Mebae Takahashi
- Department of Crown and Bridge Prosthodontics, Hokkaido University Hospital, Sapporo, Japan
| | - Ai Kudo
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Miku Saito
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Toshinori Nakajima
- Department of Crown and Bridge Prosthodontics, Hokkaido University Hospital, Sapporo, Japan
| | - Masana Maeda
- Department of Crown and Bridge Prosthodontics, Hokkaido University Hospital, Sapporo, Japan
| | - Taishi Saito
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Toshimitsu Sakuma
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Sota Takahashi
- Department of Crown and Bridge Prosthodontics, Hokkaido University Hospital, Sapporo, Japan
| | - Tomoya Ishimaru
- Department of Crown and Bridge Prosthodontics, Faculty of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Akihito Gotouda
- Department of Temporomandibular Disorders, Center for Advanced Oral Medicine, Hokkaido University Hospital, Sapporo, Japan
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Lobbezoo F, Ahlberg J, Verhoeff MC, Aarab G, Bracci A, Koutris M, Nykänen L, Thymi M, Wetselaar P, Manfredini D. The bruxism screener (BruxScreen): Development, pilot testing and face validity. J Oral Rehabil 2024; 51:59-66. [PMID: 36843424 DOI: 10.1111/joor.13442] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 02/12/2023] [Accepted: 02/20/2023] [Indexed: 02/28/2023]
Abstract
BACKGROUND To assess awake and sleep bruxism, the Standardised Tool for the Assessment of Bruxism (STAB) is currently being developed. The STAB will be a comprehensive tool for the detailed assessment of bruxism behaviour itself as well as of its possible consequences, causes, and comorbid conditions. OBJECTIVE Since the STAB cannot fully meet the 'A4 principle' for a bruxism assessment tool, i.e., being Accurate (reliable and valid), Applicable (feasible), Affordable (cost-effective), and Accessible (suitable for everyday clinical use), the Bruxism Screener (BruxScreen) has been developed to be used in large-scale epidemiological research projects and, especially, in general, dental practices. METHODS The BruxScreen consists of two parts: a questionnaire (BruxScreen-Q) to be completed by patients, and a clinical assessment form (BruxScreen-C) to be completed by dentists. RESULTS This paper describes the development of the BruxScreen and provides the outcomes of the pilot testing phase and the face validity assessment (i.e. that the first impressions of the tool indicate that it adequately reflects the construct to be measured). CONCLUSION The resulting BruxScreen is considered ready for more profound psychometric testing in the general dental setting.
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Affiliation(s)
- Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Jari Ahlberg
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Merel C Verhoeff
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Ghizlane Aarab
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Alessandro Bracci
- School of Dentistry, Department of Neurosciences, University of Padova, Padova, Italy
| | - Michail Koutris
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Laura Nykänen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Magdalini Thymi
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Peter Wetselaar
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Daniele Manfredini
- School of Dentistry, Department of Biomedical Technologies, University of Siena, Siena, Italy
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Manfredini D, Ahlberg J, Aarab G, Bender S, Bracci A, Cistulli PA, Conti PC, De Leeuw R, Durham J, Emodi-Perlman A, Ettlin D, Gallo LM, Häggman-Henrikson B, Hublin C, Kato T, Klasser G, Koutris M, Lavigne GJ, Paesani D, Peroz I, Svensson P, Wetselaar P, Lobbezoo F. Standardised Tool for the Assessment of Bruxism. J Oral Rehabil 2024; 51:29-58. [PMID: 36597658 DOI: 10.1111/joor.13411] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 12/06/2022] [Accepted: 12/29/2022] [Indexed: 01/05/2023]
Abstract
OBJECTIVE This paper aims to present and describe the Standardised Tool for the Assessment of Bruxism (STAB), an instrument that was developed to provide a multidimensional evaluation of bruxism status, comorbid conditions, aetiology and consequences. METHODS The rationale for creating the tool and the road map that led to the selection of items included in the STAB has been discussed in previous publications. RESULTS The tool consists of two axes, specifically dedicated to the evaluation of bruxism status and consequences (Axis A) and of bruxism risk and etiological factors and comorbid conditions (Axis B). The tool includes 14 domains, accounting for a total of 66 items. Axis A includes the self-reported information on bruxism status and possible consequences (subject-based report) together with the clinical (examiner report) and instrumental (technology report) assessment. The Subject-Based Assessment (SBA) includes domains on Sleep Bruxism (A1), Awake Bruxism (A2) and Patient's Complaints (A3), with information based on patients' self-report. The Clinically Based Assessment (CBA) includes domains on Joints and Muscles (A4), Intra- and Extra-Oral Tissues (A5) and Teeth and Restorations (A6), based on information collected by an examiner. The Instrumentally Based Assessment (IBA) includes domains on Sleep Bruxism (A7), Awake Bruxism (A8) and the use of Additional Instruments (A9), based on the information gathered with the use of technological devices. Axis B includes the self-reported information (subject-based report) on factors and conditions that may have an etiological or comorbid association with bruxism. It includes domains on Psychosocial Assessment (B1), Concurrent Sleep-related Conditions Assessment (B2), Concurrent Non-Sleep Conditions Assessment (B3), Prescribed Medications and Use of Substances Assessment (B4) and Additional Factors Assessment (B5). As a rule, whenever possible, existing instruments, either in full or partial form (i.e. specific subscales), are included. A user's guide for scoring the different items is also provided to ease administration. CONCLUSIONS The instrument is now ready for on-field testing and further refinement. It can be anticipated that it will help in collecting data on bruxism in such a comprehensive way to have an impact on several clinical and research fields.
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Affiliation(s)
- Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, Siena, Italy
| | - Jari Ahlberg
- Department of Oral and Maxillofacial, Diseases, University of Helsinki, Helsinki, Finland
| | - Ghizlane Aarab
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Steven Bender
- Department of Oral and Maxillofacial Surgery, Texas A&M School of Dentistry, Dallas, Texas, USA
| | | | - Peter A Cistulli
- Sleep Research Group, Charles Perkins Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
- Department of Respiratory & Sleep Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | | | - Reny De Leeuw
- Department of Oral Health Science, Orofacial Pain Center, College of Dentistry, University of Kentucky, Lexington, Kentucky, USA
| | - Justin Durham
- Newcastle University's School of Dental Sciences, Newcastle, UK
| | - Alona Emodi-Perlman
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Dominik Ettlin
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Berne, Berne, Switzerland
| | - Luigi M Gallo
- Clinic of Masticatory Disorders, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | | | | | - Takafumi Kato
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Suita, Japan
| | - Gary Klasser
- Department of Diagnostic Sciences, Louisiana State University School of Dentistry, New Orleans, Louisiana, USA
| | - Michail Koutris
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Gilles J Lavigne
- Faculty of Dental Medicine, Universite de Montréal, Quebec, Montréal, Canada
| | - Daniel Paesani
- School of Dentistry, University of Salvador/AOA, Buenos Aires, Argentina
| | - Ingrid Peroz
- Department for Prosthodontics, Gerodontology and Craniomandibular Disorders, Charité Centre for Oral Sciences, Charité - University Medicine of Berlin, Berlin, Germany
| | - Peter Svensson
- Department of Orofacial Pain and Jaw Function, Faculty of Odontology, Malmö University, Malmö, Sweden
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Peter Wetselaar
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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5
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Bracci A, Lobbezoo F, Colonna A, Bender S, Conti PCR, Emodi-Perlman A, Häggman-Henrikson B, Klasser GD, Michelotti A, Lavigne GJ, Svensson P, Ahlberg J, Manfredini D. Research routes on awake bruxism metrics: Implications of the updated bruxism definition and evaluation strategies. J Oral Rehabil 2024; 51:150-161. [PMID: 37191494 DOI: 10.1111/joor.13514] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 05/10/2023] [Indexed: 05/17/2023]
Abstract
BACKGROUND With time, due to the poor knowledge on it epidemiology, the need to focus on awake bruxism as a complement of sleep studies emerged. OBJECTIVE In line with a similar recent proposal for sleep bruxism (SB), defining clinically oriented research routes to implement knowledge on awake bruxism (AB) metrics is important for an enhanced comprehension of the full bruxism spectrum, that is better assessment and more efficient management. METHODS We summarised current strategies for AB assessment and proposed a research route for improving its metrics. RESULTS Most of the literature focuses on bruxism in general or SB in particular, whilst knowledge on AB is generally fragmental. Assessment can be based on non-instrumental or instrumental approaches. The former include self-report (questionnaires, oral history) and clinical examination, whilst the latter include electromyography (EMG) of jaw muscles during wakefulness as well as the technology-enhanced ecological momentary assesment (EMA). Phenotyping of different AB activities should be the target of a research task force. In the absence of available data on the frequency and intensity of wake-time bruxism-type masticatory muscle activity, any speculation about the identification of thresholds and criteria to identify bruxers is premature. Research routes in the field must focus on the improvement of data reliability and validity. CONCLUSIONS Probing deeper into the study of AB metrics is a fundamental step to assist clinicians in preventing and managing the putative consequences at the individual level. The present manuscript proposes some possible research routes to advance current knowledge. At different levels, instrumentally based and subject-based information must be gathered in a universally accepted standardised approach.
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Affiliation(s)
- Alessandro Bracci
- Department of Neuroscience, School of Dentistry, University of Padova, Padova, Italy
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Anna Colonna
- Department of Biomedical Technologies, School of Dentistry, University of Siena, Siena, Italy
| | - Steven Bender
- Department of Oral and Maxillofacial Surgery, Texas A&M School of Dentistry, Dallas, Texas, USA
| | - Paulo C R Conti
- Bauru School of Dentistry, University of Sao Paulo, São Paulo, Brazil
| | - Alona Emodi-Perlman
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Telaviv, Israel
| | | | - Gary D Klasser
- Department of Diagnostic Sciences, Louisiana State University School of Dentistry, New Orleans, Louisiana, USA
| | - Ambra Michelotti
- Department of Neurosciences, Reproductive Sciences and Oral Sciences, Section of Orthodontics and Temporomandibular Disorders, University of Naples Federico II, Naples, Italy
| | - Gilles J Lavigne
- Center for Advanced Research in Sleep Medicine, Research Centre, Hôpital du Sacré-Coeur de Montréal, and Universite de Montreal, Montreal, Quebec, Canada
| | - Peter Svensson
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Jari Ahlberg
- Department of Oral and Maxillofacial, Diseases, University of Helsinki, Helsinki, Finland
| | - Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, Siena, Italy
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Manfredini D, Ahlberg J, Aarab G, Bracci A, Durham J, Emodi-Perlman A, Ettlin D, Gallo LM, Häggman-Henrikson B, Koutris M, Peroz I, Svensson P, Wetselaar P, Lobbezoo F. The development of the Standardised Tool for the Assessment of Bruxism (STAB): An international road map. J Oral Rehabil 2024; 51:15-28. [PMID: 36261916 DOI: 10.1111/joor.13380] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/27/2022] [Accepted: 10/05/2022] [Indexed: 11/26/2022]
Abstract
This paper summarises the background reasoning and work that led to the selection of the items included in the Standardised Tool for the Assessment of Bruxism (STAB), also introducing the list of items. The instrument is currently being tested for face validity and on-field comprehension. The underlying premise is that the different motor activities included in the bruxism spectrum (e.g. clenching vs. grinding, with or without teeth contact) potentially need to be discriminated from each other, based on their purportedly different aetiology, comorbidities and potential consequences. Focus should be on a valid impression of the activities' frequency, intensity and duration. The methods that can be used for the above purposes can be grouped into strategies that collect information from the patient's history (subject-based), from the clinical assessment performed by an examiner (clinically based) or from the use of instruments to measure certain outcomes (instrumentally based). The three strategies can apply to all aspects of bruxism (i.e. status, comorbid conditions, aetiology and consequences). The STAB will help gathering information on many aspects, factors and conditions that are currently poorly investigated in the field of bruxism. To this purpose, it is divided into two axes. Axis A includes the self-reported information on bruxism status and potential consequences (subject-based report) together with the clinical (examiner report) and instrumental assessment (technology report). Axis B includes the self-reported information (subject-based report) on factors and conditions that may have an etiological or comorbid role for bruxism. This comprehensive multidimensional assessment system will allow building predictive model for clinical and research purposes.
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Affiliation(s)
- Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, Siena, Italy
| | - Jari Ahlberg
- Department of Oral and Maxillofacial, Diseases, University of Helsinki, Helsinki, Finland
| | - Ghizlane Aarab
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | | | - Justin Durham
- Newcastle University's School of Dental Sciences, Newcastle, UK
| | - Alona Emodi-Perlman
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Dominik Ettlin
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Berne, Berne, Switzerland
| | - Luigi M Gallo
- Clinic of Masticatory Disorders, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Birgitta Häggman-Henrikson
- Department of Odontology/Clinical Oral Physiology, Faculty of Medicine, University of Umeå, Umeå, Sweden
- Department of Orofacial Pain and Jaw function, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Michail Koutris
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Ingrid Peroz
- Department for Prosthodontics, Charité-University Medicine of Berlin, Charité Centre for Dentistry, Gerodontology and Craniomandibular Disorders, Berlin, Germany
| | - Peter Svensson
- Department of Orofacial Pain and Jaw function, Faculty of Odontology, Malmö University, Malmö, Sweden
- Section for Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Peter Wetselaar
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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7
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Nykänen L, Manfredini D, Lobbezoo F, Kämppi A, Bracci A, Ahlberg J. Assessment of awake bruxism by a novel bruxism screener and ecological momentary assessment among patients with masticatory muscle myalgia and healthy controls. J Oral Rehabil 2024; 51:162-169. [PMID: 37036436 DOI: 10.1111/joor.13462] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 03/20/2023] [Accepted: 04/03/2023] [Indexed: 04/11/2023]
Abstract
BACKGROUND Bruxism is a masticatory muscle activity occurring during sleep or wakefulness, involving grinding and clenching of teeth and/or jaw bracing. As yet, the aetiology, epidemiology and consequences of awake bruxism (AB) are largely unknown. OBJECTIVES The aims of the study were to AB behaviours using a novel bruxism screener (BruxScreen) questionnaire part and Ecological Momentary Assessment (EMA; BruxApp©) on AB behaviours, and to investigate AB's prevalence among masticatory muscle myalgia patients and non-patients. METHODS Altogether, 115 participants (masticatory myalgia patients referred to a specialist clinic (n = 67) and non-patients (n = 46)) filled in a bruxism screener questionnaire to report bruxism behaviours and jaw symptoms. A selection of both groups did a week-long EMA (patients n = 12, non-patients n = 11) to report AB behaviours. The chi-squared test was used to determine group differences in categorical variables. A logistic regression model was fitted to study the probability of AB. RESULTS According to BruxScreen, bruxism behaviours and jaw symptoms were more frequent in patients than in non-patients (p < .001). Based on EMA, 14.6% of the behaviour in patients was tooth clenching; for non-patients, this was 0.5% (p < .000). Relaxed muscles were reported by patients and non-patients at 20.6% and 56.4%, respectively (p < .021). Logistic regression, adjusted by age and sex, revealed that patients reported AB 5 times more often than non-patients (OR 4.8, 95% CI 2.1-11.2). CONCLUSION Awake bruxism behaviours are significantly more frequent in masticatory muscle myalgia patients than non-patients and associate with frequent bruxism-related symptoms. Self-reported teeth clenching seems to be the most significant sign of AB behaviour.
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Affiliation(s)
- Laura Nykänen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Daniele Manfredini
- School of Dentistry, Department of Biomedical Technologies, University of Siena, Siena, Italy
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Antti Kämppi
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | | | - Jari Ahlberg
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
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8
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Zhong J, Gao X, Hu S, Yue Y, Liu Y, Xiong X. A worldwide bibliometric analysis of the research trends and hotspots of bruxism in adults during 1991-2021. J Oral Rehabil 2024; 51:5-14. [PMID: 37635333 DOI: 10.1111/joor.13577] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 08/06/2023] [Accepted: 08/10/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND AND OBJECTIVES With the increasing attention to bruxism, the research on bruxism is increasing rapidly. However, there is still a lack of systematic bibliometric analysis in the field of bruxism in adults. This study aimed to comprehensively explore and visualize the global trends and research hotspots in the field of bruxism in adults during 1991-2021. METHODS The study searched the literature published during 1991-2021 in the Web of Science Core Collection database without language restrictions. VOSviewer, CiteSpace and Microsoft Excel were applied to analyse the authors, institutions, journals, countries, cited references, keywords and other information of the included publications, and construct visualized cooperation networks. RESULTS A total of 878 articles were finally included. The top two most productive authors in the past 30 years were Lobbezoo F and Manfredini D. ACTA-Amsterdam, Univ Sao Paulo, Univ Helsinki, Univ Padua, Univ Montreal, et al. were prominent institutions in this field. Journal of Oral Rehabilitation made outstanding contributions in this field. The United States produced the most documents in this field, followed by Brazil. Both countries and authors cooperated closely around the world. The two most cited articles focused on the definition, assessment and classification of bruxism. In recent years, diagnostic criteria and stress have begun to receive a lot of attention. CONCLUSION From 1991 to 2021, the attention to bruxism in adults continued to increase. Diagnostic criteria and stress may be potential research hotspots in this field. This study references relevant scholars on development trends and research hotspots.
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Affiliation(s)
- Jiawei Zhong
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xinlin Gao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shoushan Hu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuan Yue
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yang Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Temporomandibular Joint, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xin Xiong
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Temporomandibular Joint, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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9
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Archer AB, Da-Cas CD, Valesan LF, Cunha TCA, Januzzi E, Garanhani RR, de La Torre Canales G, de Souza BDM. Prevalence of awake bruxism in the adult population: a systematic review and meta-analysis. Clin Oral Investig 2023; 27:7007-7018. [PMID: 37853263 DOI: 10.1007/s00784-023-05302-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 10/02/2023] [Indexed: 10/20/2023]
Abstract
OBJECTIVES To evaluate the prevalence of awake bruxism (AB) in the adult population. MATERIALS AND METHODS Six main electronic databases and three sources of grey literature were searched to identify cross-sectional studies in which AB was assessed. The studies were independently selected by two reviewers in two phases, based on their eligibility criteria. The first one consisted of reading titles and abstracts, and the second one involved reading the full articles. The study quality assessment was obtained by using the "Joanna Briggs Institute Critical Appraisal Checklist for Studies Reporting Prevalence Data", and the "R Statistics" software was used to perform meta-analyses. RESULTS Seventeen out of 3086 identified studies were included. None of the studies scored high in methodological quality across all 9 items of the JBI checklist. However, "the use of valid methods to identify pathology" and "appropriate statistical analysis" were considered to have high methodological quality in all the studies. The overall pooled prevalence of the meta-analysis was 15.44% (99% confidence interval: 10.81 to 20.72%) and there was no difference for sex, sampling method and according to consensus-based classification. CONCLUSIONS The prevalence of AB in adults was low. There was substantial methodological variability, which highlights the need for standardized guidelines. CLINICAL RELEVANCE Prevalence data are useful for raising patients' and clinicians' awareness of the AB. Moreover, since AB can lead to possible pain and overload of the stomatognathic system, this knowledge can also guide dentists to achieve an early diagnosis of AB and to provide appropriate care management.
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Affiliation(s)
- Adriana Battisti Archer
- Postgraduate Program in Dentistry, Federal University of Santa Catarina (UFSC), Av. Delfino Conti, S/N - Trindade, Florianópolis, SC, 88040-900, Brazil.
| | - Cecília Doebber Da-Cas
- Postgraduate Program in Dentistry, Federal University of Santa Catarina (UFSC), Av. Delfino Conti, S/N - Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Lígia Figueiredo Valesan
- Postgraduate Program in Dentistry, Federal University of Santa Catarina (UFSC), Av. Delfino Conti, S/N - Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Thays Crosara Abrahão Cunha
- Federal University of Uberlândia, Av. João Naves de Ávila, 2121 - Santa Mônica, Uberlândia, MG, 38408-100, Brazil
| | - Eduardo Januzzi
- Orofacial Pain Center, Hospital Mater Dei (HMD), Av. Gonçalves Dias, 2.700 - Santo Agostinho, Belo Horizonte, MG, 30190-094, Brazil
| | - Roberto Ramos Garanhani
- Zenith Specialization School, Av. Trompowsky, 354 - 1 - Centro, Florianópolis, SC, 88015-300, Brazil
| | - Giancarlo de La Torre Canales
- Egas Moniz Center for Interdisciplinary Research (CiiEM); Egas Moniz School of Health & Science, Caparica, Almada, Portugal
| | - Beatriz Dulcineia Mendes de Souza
- Department of Dentistry, Federal University of Santa Catarina (UFSC), Av. Delfino Conti, S/N - Trindade, Florianópolis, SC, 88040-900, Brazil
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10
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Colonna A, Bracci A, Ahlberg J, Câmara-Souza MB, Bucci R, Conti PCR, Dias R, Emodi-Perlmam A, Favero R, Häggmän-Henrikson B, Michelotti A, Nykänen L, Stanisic N, Winocur E, Lobbezoo F, Manfredini D. Ecological Momentary Assessment of Awake Bruxism Behaviors: A Scoping Review of Findings from Smartphone-Based Studies in Healthy Young Adults. J Clin Med 2023; 12:jcm12051904. [PMID: 36902690 PMCID: PMC10003979 DOI: 10.3390/jcm12051904] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/29/2022] [Accepted: 02/21/2023] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND The recent introduction of ecological momentary assessment (EMA) smartphone-based strategies has allowed achieving some interesting data on the frequency of different awake bruxism (AB) behaviors reported by an individual in the natural environment. OBJECTIVE The present paper aims to review the literature on the reported frequency of AB based on data gathered via smartphone EMA technology. METHODS On September 2022, a systematic search in the Pubmed, Scopus and Google Scholar databases was performed to identify all peer-reviewed English-language studies assessing awake bruxism behaviors using a smartphone-based Ecological Momentary Assessment. The selected articles were assessed independently by two authors according to a structured reading of the articles' format (PICO). RESULTS A literature search, for which the search terms "Awake Bruxism" and "Ecological Momentary Assessment" were used, identified 15 articles. Of them, eight fulfilled the inclusion criteria. The results of seven studies using the same smartphone-based app reported a frequency of AB behaviors in the range between 28.3 and 40% over one week, while another investigation adopted a different smartphone-based EMA approach via WhatsApp using a web-based survey program and reported an AB frequency of 58.6%. Most included studies were based on convenience samples with limited age range, highlighting the need for more studies on other population samples. CONCLUSIONS Despite the methodological limits, the results of the reviewed studies provide a standpoint for comparison for future studies on the epidemiology of awake bruxism behaviors.
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Affiliation(s)
- Anna Colonna
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
- Correspondence: ; Tel.: +39-0039-349-1237077
| | - Alessandro Bracci
- Department of Neurosciences, School of Dentistry, University of Padova, 35128 Padova, Italy
| | - Jari Ahlberg
- Department of Oral and Maxillofacial Diseases, University of Helsinki, 00100 Helsinki, Finland
| | | | - Rosaria Bucci
- Department of Neurosciences, Reproductive Sciences and Oral Sciences, Section of Orthodontics and Temporomandibular Disorders, University of Naples “Federico II”, 80138 Naples, Italy
| | | | - Ricardo Dias
- Institute of Oral Implantology and Prosthodontics, Dentistry Department, Faculty of Medicine, University of Coimbra, 3004-531 Coimbra, Portugal
| | - Alona Emodi-Perlmam
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Riccardo Favero
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
- Department of Neurosciences, School of Dentistry, University of Padova, 35128 Padova, Italy
| | - Birgitta Häggmän-Henrikson
- Department of Orofacial Pain and Jaw function, Faculty of Odontology, Malmö University, 211 19 Malmö, Sweden
| | - Ambrosina Michelotti
- Department of Neurosciences, Reproductive Sciences and Oral Sciences, Section of Orthodontics and Temporomandibular Disorders, University of Naples “Federico II”, 80138 Naples, Italy
| | - Laura Nykänen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, 00100 Helsinki, Finland
| | - Nikola Stanisic
- Department of Orofacial Pain and Jaw function, Faculty of Odontology, Malmö University, 211 19 Malmö, Sweden
| | - Efraim Winocur
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
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11
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Câmara-Souza MB, Bracci A, Colonna A, Ferrari M, Rodrigues Garcia RCM, Manfredini D. Ecological Momentary Assessment of Awake Bruxism Frequency in Patients with Different Temporomandibular Disorders. J Clin Med 2023; 12:jcm12020501. [PMID: 36675431 PMCID: PMC9862722 DOI: 10.3390/jcm12020501] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 01/11/2023] Open
Abstract
Self-reported awake bruxism (AB) has been associated with temporomandibular disorders (TMD). However, the daily amount of AB behavior has not been quantified in pain patients. Therefore, this study aimed to assess AB frequency in patients with myofascial pain and temporomandibular joint (TMJ) pain and compare it to a group of pain-free individuals. Eighty-four individuals belonging to either a TMD group (n = 54) or a healthy control group (n = 30) were selected. AB frequency was obtained by ecological momentary assessment with a dedicated smartphone application that sent sound alerts at random intervals during the day for one week. Upon receiving the alert, the volunteer reported the current muscular condition and/or the teeth position, i.e., relaxed jaw muscle, jaw bracing, teeth contact, teeth clenching, or teeth grinding. Data were evaluated by independent t-test (α = 0.05). During the seven days, AB frequency was 62.1% ± 26.8% for TMD patients and 36.2% ± 27.3% for pain-free subjects (p < 0.001). Mandible bracing was most common in the TMD group (p < 0.001), while teeth contact, clenching, and grinding did not differ between groups. Moreover, no differences were found in AB frequency between myofascial pain and TMJ pain patients. Therefore, TMD patients have higher AB frequency characterized by jaw bracing, irrespective of pain location.
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Affiliation(s)
- Mariana Barbosa Câmara-Souza
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas, Piracicaba 13414-903, Brazil
- School of Dentistry, Ingá University Center, Paraná 87035-510, Brazil
- Correspondence:
| | - Alessandro Bracci
- Department of Neurosciences, School of Dentistry, University of Padova, 35128 Padova, Italy
| | - Anna Colonna
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
| | - Marco Ferrari
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
| | | | - Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
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12
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Vlăduțu DE, Ionescu M, Mercuț R, Noveri L, Lăzărescu G, Popescu SM, Scrieciu M, Manolea HO, Iacov Crăițoiu MM, Ionescu AG, Mercuț V. Ecological Momentary Assessment of Masseter Muscle Activity in Patients with Bruxism. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:ijerph20010581. [PMID: 36612902 PMCID: PMC9819829 DOI: 10.3390/ijerph20010581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 05/31/2023]
Abstract
According to the International Bruxism Consensus, bruxism refers to the activity of the masticatory muscles reflecting contraction disorders, regardless of whether it is during sleep (SB) or an awake (AB) state. The objective of the present study was to evaluate the activity of the masseter muscle by surface electromyographic (sEMG) recordings. This study was performed on 20 participants with self-reported “possible bruxism” (study group) and 20 participants with no self-reported bruxism (control group); all participants underwent an evaluation of the masseter muscle activity using the dia-BRUXO device, which provides numerical parameters regarding sEMG (the total duration and the type of bruxism specific events, the effort made by the masticatory muscles during the recording period, and the personal bruxism index of each participant). Participants from the study group presented more clenching events during AB, three times more frequent than the control group (p = 0.002, Mann−Whitney U test); for SB, the frequency of clenching and grinding events was comparable within the study group, being more frequent than for the control group; the mean value of the effort index was higher for AB (1.177%) than SB (0.470%) and the same for the duration index, with a mean value of 2.788% for AB and 1.054% for SB. All participants from the control group presented reduced values for all acquired parameters. Overall, the personal bruxism index in AB was approximately four times higher for the study group (2.251%) compared to the control group (0.585%) (p < 0.005, Mann−Whitney U test). Similar values were obtained for SB. All participants with “possible bruxism” from the study group presented a higher activity of the masseter muscle, which is specific for bruxism, thus being defined as “definite bruxism”.
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Affiliation(s)
- Diana Elena Vlăduțu
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Mihaela Ionescu
- Department of Medical Informatics and Biostatistics, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Răzvan Mercuț
- Department of Plastic Surgery, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | | | - Grigore Lăzărescu
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Sanda Mihaela Popescu
- Department of Oral Rehabilitation, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Monica Scrieciu
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Horia Octavian Manolea
- Department of Dental Materials, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | | | - Alin Gabriel Ionescu
- Department of Medical History, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Veronica Mercuț
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
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13
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Bracci A, Lobbezoo F, Häggman-Henrikson B, Colonna A, Nykänen L, Pollis M, Ahlberg J, Manfredini D. Current Knowledge and Future Perspectives on Awake Bruxism Assessment: Expert Consensus Recommendations. J Clin Med 2022; 11:jcm11175083. [PMID: 36079013 PMCID: PMC9457508 DOI: 10.3390/jcm11175083] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 12/14/2022] Open
Abstract
Awake bruxism (AB) is differentiated from sleep bruxism (SB) by the differences in etiology, comorbidities, and consequences related to the different spectrum of muscle activities exerted in relation to the different circadian manifestations. Furthermore, less literature data are available on AB than on SB. The introduction of ecological momentary assessment (EMA) strategies has allowed for collecting valuable data on the frequency of the different activities reported by an individual in his/her natural environment. This strategy has been further improved with the recent use of smartphone technologies. Recent studies have described an average frequency of AB behaviors, within the range of 23–40% for otherwise healthy young adults. An association between AB and some psychological traits has emerged, and the findings have indicated that patients with musculoskeletal symptoms (e.g., temporomandibular joint and/or muscle pain, muscle stiffness, and fatigue) report higher AB frequencies. Preliminary data suggest that muscle bracing and teeth contact are the most commonly reported behaviors, while teeth clenching is much less frequently reported than commonly believed previously. Report of teeth grinding during wakefulness is almost absent. This paper has critically reviewed the currently available approaches for the assessment of AB. In addition, some future perspectives and suggestions for further research have been provided.
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Affiliation(s)
- Alessandro Bracci
- Department of Neurosciences, School of Dentistry, University of Padova, 35128 Padova, Italy
- Correspondence:
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
| | - Birgitta Häggman-Henrikson
- Department of Orofacial Pain and Jaw Function, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - Anna Colonna
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
| | - Laura Nykänen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, 00100 Helsinki, Finland
| | - Matteo Pollis
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
| | - Jari Ahlberg
- Department of Oral and Maxillofacial Diseases, University of Helsinki, 00100 Helsinki, Finland
| | - Daniele Manfredini
- Department of Biomedical Technologies, School of Dentistry, University of Siena, 53100 Siena, Italy
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