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Falardeau D, Dubois S, Kolta A. The coordination of chewing. Curr Opin Neurobiol 2023; 83:102805. [PMID: 37913688 DOI: 10.1016/j.conb.2023.102805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 09/11/2023] [Accepted: 10/04/2023] [Indexed: 11/03/2023]
Abstract
Feeding behavior involves a complex organization of neural circuitry and interconnected pathways between the cortex, the brainstem, and muscles. Elevated synchronicity is required starting from the moment the animal brings the food to its mouth, chews, and initiates subsequent swallowing. Moreover, orofacial sensory and motor systems are coordinated in a way to optimize movement patterns as a result of integrating information from premotor neurons. Recent studies have uncovered significant discoveries employing various and creative techniques in order to identify key components in these vital functions. Here, we attempt to provide a brief overview of our current knowledge on orofacial systems. While our focus will be on recent breakthroughs regarding the masticatory machinery, we will also explore how it is sometimes intertwined with other functions, such as swallowing and limb movement.
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Affiliation(s)
- Dominic Falardeau
- Centre Interdisciplinaire de Recherche sur le Cerveau et l'Apprentissage (CIRCA), QC, Canada; Department of Neurosciences, Faculty of Medecine, Université de Montréal, QC, Canada
| | - Sophia Dubois
- Centre Interdisciplinaire de Recherche sur le Cerveau et l'Apprentissage (CIRCA), QC, Canada; Department of Neurosciences, Faculty of Medecine, Université de Montréal, QC, Canada
| | - Arlette Kolta
- Centre Interdisciplinaire de Recherche sur le Cerveau et l'Apprentissage (CIRCA), QC, Canada; Department of Neurosciences, Faculty of Medecine, Université de Montréal, QC, Canada; Department of Stomatology, Faculty of Dentistry, Université de Montréal, QC, Canada.
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2
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Cicvaric O, Grzic R, Erpusina MS, Ivancic Jokic N, Bakarcic D. Association of masticatory efficiency with deep carious lesions in children. Eur Arch Paediatr Dent 2023; 24:569-575. [PMID: 37725266 DOI: 10.1007/s40368-023-00819-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/21/2023] [Indexed: 09/21/2023]
Abstract
PURPOSE Masticatory efficiency is defined as an individual ability to grind and pulverize food material, and can be influenced by many factors. This research aimed to investigate the association between masticatory efficiency and deep carious lesion. METHODS The research included 48 children (24 male, 24 female) aged from 3 to 14 years. Participants were allocated to two groups; children with no or with only incipient carious lesions were included in the first group (ICDAS levels 0, 1, or 2), and children with bilateral deep carious lesions that are ICDAS levels 4, 5, and 6 were included in the second group. Information on dental parameters (dental status, ICDAS level of each carious lesion), and level of pain (Wong-Baker scale) were collected from each participant. Participants chewed Optosil® test food for 20 masticatory cycles, and chewed particles were analyzed by the optical scanning method. RESULTS There is a significant difference in masticatory efficiency variables (number of chewed particles, minimal and maximal Feret diameter, Sauter mean diameter, a mean and total surface of particles) between groups. A positive significant correlation is observed between WBS level and time needed for masticatory performance in a group of children with deep carious lesions. CONCLUSION Deep carious lesions in children are associated with a decrease in masticatory efficiency. Moreover, children with carious lesions that provoke a higher level of pain take more time for masticatory cycles.
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Affiliation(s)
- O Cicvaric
- Department of Paediatric Dentistry, Faculty of Dental Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Rijeka, Croatia
| | - R Grzic
- Department of Prosthodontics, Faculty of Dental Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Rijeka, Croatia
| | - M S Erpusina
- Department of Paediatric Dentistry, Faculty of Dental Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Rijeka, Croatia
| | - N Ivancic Jokic
- Department of Paediatric Dentistry, Faculty of Dental Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Rijeka, Croatia.
| | - D Bakarcic
- Department of Paediatric Dentistry, Faculty of Dental Medicine, University of Rijeka, Clinical Hospital Center Rijeka, Rijeka, Croatia
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Homsi G, Karlsson A, Almotairy N, Trulsson M, Kumar A, Grigoriadis A. Subjective and objective evaluation of masticatory function in patients with bimaxillary implant-supported prostheses. J Oral Rehabil 2023; 50:140-149. [PMID: 36415039 PMCID: PMC10108236 DOI: 10.1111/joor.13393] [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: 04/06/2022] [Revised: 11/07/2022] [Accepted: 11/17/2022] [Indexed: 11/24/2022]
Abstract
BACKGROUND People perform poorly in masticatory function tests despite well-functioning prostheses. However, it is unclear whether there is an agreement between subjective and objective measures of mastication. OBJECTIVES To investigate the association between subjective and objective measures of masticatory function in patients with bimaxillary implant-supported prostheses. MATERIALS AND METHODS An experimental group (n = 25, age = 70.6 ± 7.5 years, eight women) with bimaxillary implant-supported fixed prostheses and a control group (n = 25, age = 69.0 ± 5.3, 13 women) with natural dentition were recruited. The participants in the experimental group were included if they had been using the prosthesis for at least a year and had no obvious complaints with their prostheses. The control group was people with natural dentition and without any prostheses or complaints related to the masticatory system. The masticatory function was evaluated objectively with food comminution and mixing ability tests, and subjectively with jaw function limitation scale (JLFS) and oral health impact profile (OHIP). RESULTS The experimental group performed poorly in both objective tests (p < .001). However, there was no significant differences between the two groups in total JFLS (p = .114) and OHIP (p = .312) scores. Though, there were certain positive correlations between the food comminution test and JFLS subdomains in the control group, and a positive correlation between food comminution test and specific subdomains of OHIP in the experimental group indicating poor correlation between the subjective and objective measures. CONCLUSION Although patients with implant prostheses show poor masticatory performance, there is no agreement in the objective and subjective measures of mastication.
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Affiliation(s)
- George Homsi
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Stockholm, Sweden.,Tandvården Sergel, Praktikertjänst, Stockholm, Sweden
| | - Anna Karlsson
- Tandvården Sergel, Praktikertjänst, Stockholm, Sweden
| | - Nabeel Almotairy
- Department of Orthodontics and Pediatric Dentistry, College of Dentistry, Qassim University, Buraidah, Buraidah, Saudi Arabia
| | - Mats Trulsson
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Stockholm, Sweden
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Stockholm, Sweden
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Stockholm, Sweden
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Al-Manei K, Almotairy N, Al-Manei KK, Grigoriadis A, Kumar A. Effect of Apical Microsurgery on Force Regulation of Incisor Teeth during Unpredictable Force Control Task. J Oral Rehabil 2022; 49:788-795. [PMID: 35441717 PMCID: PMC9542888 DOI: 10.1111/joor.13334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 04/05/2022] [Accepted: 04/13/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Apical microsurgery (AMS) involves removal of the root-end which can affect the force regulation of teeth. OBJECTIVE To investigate the force regulation of incisor teeth treated with AMS during the unpredictable force control task in comparison to their contralateral teeth with complete root apices, in humans. METHODS Fifteen eligible participants (8 women and 7 men; mean age 52.9 ± SD 4.4 years) performed a standardized unpredictable force control task which involved pulling and holding a force transducer with AMS-treated incisors and its contralateral control teeth (n =30 teeth). A series of four load masses: 100, 200, 50, and 300 gm were attached to the force transducer through a string in an unpredictable manner. The force profile obtained was divided into initial and later time-segments. The peak force and peak force rate during the initial time-segment, and the holding force and coefficient of variability during the later time-segments were calculated and compared by the repeated measures analysis of variance. RESULTS During the initial time-segment, the peak force and peak force rate were significantly lower in the AMS-treated teeth than in the controls (P = 0.001, P = 0.013, respectively). However, during the later time-segment, no significant differences in the holding force nor the coefficient of variability were observed between the AMS-treated teeth and their controls (P = 0.755, P = 0.213, respectively). CONCLUSION In contrast to incisors with complete normal root apices, AMS-treated incisors do not show robust changes in force regulation.
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Affiliation(s)
- Khaled Al-Manei
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, 14104, Sweden.,Division of Endodontics, Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Nabeel Almotairy
- Department of Orthodontics and Pediatric Dentistry, College of Dentistry, Qassim University, Buraidah, 52571, Saudi Arabia
| | - Kholod Khalil Al-Manei
- Division of Endodontics, Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, 11545, Saudi Arabia
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, 14104, Sweden
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, 14104, Sweden
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González-Gil D, Flores-Fraile J, López-Marcos J. Tactile Sensibility Thresholds in Implant Prosthesis, Complete Dentures and Natural Dentition: Review about Their Value in Literature. Medicina (B Aires) 2022; 58:medicina58040501. [PMID: 35454340 PMCID: PMC9027843 DOI: 10.3390/medicina58040501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 11/16/2022] Open
Abstract
Background and Objectives: The periodontium has important proprioceptive receptors that prevent teeth from using excessive occlusal forces during chewing. There are other receptors from adjacent tissues that replace periodontal ones when teeth are extracted and rehabilitated with prosthesis, although they seem to be less effective. Psychophysical studies investigate tactile sensibility thresholds, which are useful to measure this masticatory efficiency in different prosthetic rehabilitations. There are two types of sensibility depending on the receptors that are activated during these studies: active and passive tactile sensibility. The purpose of this study is to obtain active and passive tactile sensibility threshold figures in natural dentition and prosthetic rehabilitations so we can compare them and understand how this sensibility works in different situations. Materials and Methods: We performed a systematic review of the available literature, following PRISMA guidelines and including articles from 2004 to 2021 in the MEDLINE database. Only 10 articles were included in this investigation as they provided concrete threshold figures. Results: The mean values of active tactile sensibility thresholds in complete dentures, implant prosthesis and natural dentition are 64 µ, 23.3 µ and 16.1 µ, respectively. The mean values of passive tactile sensibility thresholds in implant prosthesis and natural dentition are 6.7 N and 0.8 N, respectively. Conclusions: Implant prosthesis have lower thresholds, that are very close to those present in natural dentition, than complete dentures due to an increased tactile sensibility. Active tactile sensibility thresholds present fewer differences between values than passive tactile ones; as these are only influenced by receptors from periodontal or periimplant tissues.
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Kumar A, Munirji L, Nayif S, Almotairy N, Grigoriadis J, Grigoriadis A, Trulsson M. Motor Performance and Skill Acquisition in Oral Motor Training With Exergames: A Pilot Study. Front Aging Neurosci 2022; 14:730072. [PMID: 35309890 PMCID: PMC8924593 DOI: 10.3389/fnagi.2022.730072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 02/11/2022] [Indexed: 11/15/2022] Open
Abstract
Objective To investigate the effects of oral-motor training with exergames on motor performance and motor skill acquisition in two different age groups. Methods Thirty-two healthy participants were recruited in the current pilot study and divided equally into two groups (Gen Z and Baby Boomers) according to their age. A pair of electromyographic (EMG) electrodes were placed on the participants’ masseter muscles. The EMG device communicated via Bluetooth with a mobile video game in response to the electromyographic activity of the masseter muscles during clenching. During the experimental session, participants were asked to play a video game in five blocks of 5 min each, with a 3-min break between each time block. The goal of the game was to collect as many coins (game points) as possible and to dodge/avoid upcoming obstacles (game life). Motor performance was assessed by performance scores and the number of game lives. Skill acquisition was measured by task efficiency (ratio of performance scores and number of game lives) across time blocks. Results The results of the study showed significantly lower performance scores (p < 0.001), a higher number of game lives (p < 0.001), and lower task efficiency in the Baby Boomer group compared to the Gen Z group. Specifically, the results showed that there was a significant difference in task efficiency between the first and second, third and fourth, fourth- and fifth-time blocks in the Gen Z group (p < 0.002). However, there was only a significant difference between first- and second-time blocks in the Baby Boomer group (p = 1.012), suggesting that skill acquisition in the Baby Boomer group did not change significantly over the course of the time blocks. Conclusion The study showed higher motor performance and superior motor skill acquisition with novel exergame training in the Gen Z group compared to the Baby Boomer group. The results of the study indicate that there is an improvement in oral motor skills with short-term training, yet the differences in oral motor skills between the two groups are still evident. The Baby Boomer group, unlike the Gen Z group, did not show robust improvement in task efficiency over the course of the series.
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Affiliation(s)
- Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
- *Correspondence: Abhishek Kumar,
| | - Linda Munirji
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Sam Nayif
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Nabeel Almotairy
- Department of Orthodontics and Pediatric Dentistry, College of Dentistry, Qassim University, Buraidah, Saudi Arabia
| | - Joannis Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Mats Trulsson
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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González-Gil D, Dib-Zaitum I, Flores-Fraile J, López-Marcos J. Importance of Osseoperception and Tactile Sensibility during Masticatory Function in Different Prosthetic Rehabilitations: A Review. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58010092. [PMID: 35056400 PMCID: PMC8782027 DOI: 10.3390/medicina58010092] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/29/2021] [Accepted: 01/04/2022] [Indexed: 12/03/2022]
Abstract
Background and Objectives: Tactile sensibility is an important characteristic for evaluating the masticatory efficiency in different occlusal situations. When a tooth is extracted, relevant proprioceptors from the periodontal ligament get lost; and after the rehabilitation of this abscess by means of oral prosthesis, this sensibility decreases influencing masticatory function. Osseoperception is a sensitive phenomenon associated with dental implants that allows an increased tactile sensibility to those wearing implant prostheses. The purpose of this study was to determine the difference in tactile sensibility values between implant prosthesis, complete dentures, and natural teeth through a review of the available literature. Materials and Methods. In order to dissect the information, 24 articles from 2004 to 2021 were analyzed from MEDLINE, PubMed Central, and Web of Science databases. These articles were directly related to measuring tactile sensibility in different situations and demonstrating the influence of osseoperception in an improved masticatory function. Results: Tactile sensibility in implant prosthesis is slightly reduced compared with natural dentition but presents improved values with regard to complete dentures. Conclusions: Implant prosthesis are more effective during masticatory function than complete dentures, as they present an increased tactile sensibility, very similar to that present in natural dentition. This enhanced sensibility in implants is due to the osseoperception phenomenon.
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Assessment of masticatory function in older individuals with bimaxillary implant-supported fixed prostheses or with a natural dentition: A case-control study. J Prosthet Dent 2021:S0022-3913(21)00494-7. [PMID: 34627612 DOI: 10.1016/j.prosdent.2021.08.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 08/27/2021] [Accepted: 08/27/2021] [Indexed: 11/23/2022]
Abstract
STATEMENT OF PROBLEM A clinical assessment of the masticatory performance of edentulous people treated with bimaxillary implant-supported fixed prostheses is lacking. PURPOSE The purpose of this case-control study was to compare the masticatory performance of edentulous people treated with bimaxillary implant-supported fixed prostheses to that of those with a natural dentition by using a simplified comminution test with hard viscoelastic test food and a mixing ability test. MATERIAL AND METHODS Thirty-six participants were recruited and divided into 2 equal groups (n=18) based on their dental status. The experimental group (7 women, mean ±standard deviation age=69.8 ±7.5 years) had bimaxillary implant-supported fixed prostheses, and the control group (9 women, mean ±standard deviation age=68.3 ±5.6 years) had a natural dentition. A hard viscoelastic food comminution test and a mixing ability test with 2-colored chewing gum were performed in both groups. The number and total area of the particles during the comminution test and the variance of hue during the mixing ability test were measured. The data were analyzed with the parametric (paired t test) and nonparametric (Mann-Whitney U) tests to assess differences between the groups (α=.05). RESULTS The experimental group exhibited significantly fewer pieces in the food comminution test than the control group (P=.001). The experimental group also showed significantly higher variance of hue values than the control group (P<.001). CONCLUSIONS Patients treated with bimaxillary implant-supported prostheses had reduced masticatory performance in comparison to those with a natural dentition, despite having been provided with satisfactory and well-functioning prostheses.
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Kothari SF, Visser M, Timmerman K, Baad-Hansen L, Koutris M, Lobbezoo F, Svensson P. Painful and non-painful symptoms evoked by experimental bracing and thrusting of the mandible in healthy individuals. J Oral Rehabil 2021; 48:1004-1012. [PMID: 34191303 DOI: 10.1111/joor.13222] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/06/2021] [Accepted: 06/21/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Bruxism may involve bracing and thrusting of the mandible, in addition to clenching or grinding of the teeth. It is unclear how bracing and thrusting may contribute to potential musculoskeletal symptoms associated with bruxism. OBJECTIVE To examine the effect of experimental bracing and thrusting of the mandible on the development of musculoskeletal symptoms in healthy volunteers. METHODS Thirty healthy volunteers performed six trials of 5 min of repeated bracing and thrusting of the mandible. Bracing involved forcefully maintaining maximum protruded position (5 s with 1 s rest in between), whereas thrusting involved forcefully moving the mandible in a forward direction and back (1 Hz). The participants rated pain, unpleasantness, soreness, fatigue, tension, stiffness, stress and headache on 10-cm visual analogue scales (VAS) before, immediately and 24 h after the tasks. Pain drawings were obtained and maximum voluntary protrusive force (MVPF) was determined before and after the tasks. The outcome parameters for each task were compared between the time points. RESULTS There was a significant increase in the VAS scores (2-4/10) of pain, unpleasantness, soreness, fatigue, tension, stiffness and stress immediately following the tasks compared to baseline and 24 h after the tasks (p < .008). Pain was frequently reported in masseter muscles. MVPF values were significantly higher immediately (p < .001) and 24 h after thrusting (p < .001) and bracing (p = .012) tasks compared to the baseline. CONCLUSIONS Experimental bracing and thrusting of the mandible evoked transient, mild-to-moderate levels of muscle pain, fatigue, tension and stiffness and increased unpleasantness and stress scores in healthy volunteers.
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Affiliation(s)
- Simple Futarmal Kothari
- Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark.,Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark
| | - Meike Visser
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Kimberley Timmerman
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Lene Baad-Hansen
- Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark
| | - Michail Koutris
- 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
| | - Peter Svensson
- Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark.,Department of Orofacial Pain and Jaw Function, Faculty of Odontology, Malmӧ University, Malmӧ, Sweden
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Hedberg L, Ekman U, Nordin LE, Smedberg JI, Skott P, Seiger Å, Sandborgh-Englund G, Westman E, Kumar A, Trulsson M. Cognitive changes and neural correlates after oral rehabilitation procedures in older adults: a protocol for an interventional study. BMC Oral Health 2021; 21:297. [PMID: 34107933 PMCID: PMC8191046 DOI: 10.1186/s12903-021-01654-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 06/03/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Epidemiological studies show an association between masticatory function and cognitive impairment. This has further strengthened the notion that tooth loss and impaired masticatory function may be risk factors for dementia and cognitive decline. Animal experiments have indicated a causal relationship and several possible mechanisms have been discussed. This evidence is, however, lacking in humans. Therefore, in the current interventional study, we aim to investigate the effect of rehabilitation of masticatory function on cognition in older adults. METHODS Eighty patients indicated for prosthodontic rehabilitation will be randomly assigned to an experimental or a control group. Participants will conduct neuropsychological assessments, masticatory performance tests, saliva tests, optional magnetic resonance imaging, and answer questionnaires on oral health impact profiles and hospital anxiety and depression scale before, 3 months, and 1 year after oral rehabilitation. The difference between the two groups is that the control group will be tested an additional time, (at an interval of about 3 months) before the onset of the oral rehabilitation procedure. The primary outcome is a change in measures of episodic memory performance. DISCUSSION Although tooth loss and masticatory function are widespread in older people, it is still an underexplored modifiable risk factor potentially contributing to the development of cognitive impairment. If rehabilitation of masticatory function shows positive effects on the neurocognitive function, this will have great implications on future health care for patients with impaired masticatory status. The present project may provide a new avenue for the prevention of cognitive decline in older individuals. TRIAL REGISTRATION The protocol for the study was retrospectively registered in ClinicalTrials.gov Identifier: NCT04458207, dated 02-07-2020.
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Affiliation(s)
- Linn Hedberg
- Folktandvården Eastmaninstitutet, Stockholm, Sweden
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Alfred Nobels Allé 8, Box 4064, 141 04, Huddinge, Sweden
| | - Urban Ekman
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Huddinge, Sweden
| | - Love Engström Nordin
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Huddinge, Sweden
- Department of Diagnostic Medical Physics, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Jan-Ivan Smedberg
- Folktandvården Eastmaninstitutet, Stockholm, Sweden
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Alfred Nobels Allé 8, Box 4064, 141 04, Huddinge, Sweden
| | - Pia Skott
- Folktandvården Eastmaninstitutet, Stockholm, Sweden
- Academic Centre for Geriatric Dentistry, Stockholm, Sweden
| | - Åke Seiger
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Huddinge, Sweden
- Academic Centre for Geriatric Dentistry, Stockholm, Sweden
| | - Gunilla Sandborgh-Englund
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Alfred Nobels Allé 8, Box 4064, 141 04, Huddinge, Sweden
- Academic Centre for Geriatric Dentistry, Stockholm, Sweden
| | - Eric Westman
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Huddinge, Sweden
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Alfred Nobels Allé 8, Box 4064, 141 04, Huddinge, Sweden.
| | - Mats Trulsson
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Alfred Nobels Allé 8, Box 4064, 141 04, Huddinge, Sweden
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Glöggler JC, Hellmann D, Von Manstein M, Jäger R, Repky S, Beyersmann J, Lapatki BG. Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position-An exploratory study. J Oral Rehabil 2021; 48:891-900. [PMID: 33983634 DOI: 10.1111/joor.13183] [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: 11/04/2020] [Revised: 05/07/2021] [Accepted: 05/09/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Passive mandibular advancement with functional appliances is commonly used to treat juvenile patients with mandibular retrognathism. OBJECTIVE The aim of this study was to investigate whether active repetitive training of the mandible into an anterior position would result in a shift of the habitual mandibular position (HMP). METHODS Twenty adult healthy subjects were randomly assigned to one of two groups: a training group receiving six supervised functional training sessions of 10 min each and a control group without training. Bonded lateral biteplates disengaged occlusion among both groups throughout the 15-day experiment. Customised registration-training appliances consisted of a maxillary component with an anterior plane and a mandibular component with an attached metal sphere. Training sessions consisted of repeated mouth-opening/closing cycles (frequency: 30/min) to hit an anteriorly positioned hemispherical target notch with this metal sphere. The HMP was registered at defined times during the experiment. RESULTS The HMP in the training group showed a statistically significant anterior shift of 1.6 mm (interquartile range [IQR]: 1.2 mm), compared with a significant posterior shift of -0.8 mm (IQR: 2.8 mm) in the control group (p < .05). Although the anterior shift among the training group showed a partial relapse 4 days after the first training block, it then advanced slightly in the 4-day interval after the second training block, which might indicate neuroplasticity of the masticatory motor system. CONCLUSIONS Motor learning by repetitive training of the mandible into an anterior position might help to improve the results of functional appliance therapy among patients with mandibular retrognathism.
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Affiliation(s)
| | - Daniel Hellmann
- Department of Prosthodontics, University of Würzburg, Würzburg, Germany
| | | | - Rudolph Jäger
- Department of Orthodontics, Ulm University, Ulm, Germany
| | - Stefan Repky
- Institute of Statistics, Ulm University, Ulm, Germany
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12
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Stahl F, Pollex D, Mathmann P, Weinhold L, Rohrbach S. Digitomotography in children with oro-facial dysfunction (OFD, oro-facial myofunctional disorders) and childhood apraxia of speech (CAS). J Oral Rehabil 2021; 48:937-944. [PMID: 33797781 DOI: 10.1111/joor.13174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/26/2021] [Accepted: 03/18/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Oro-facial dysfunctions (OFDs; oro-facial myofunctional disorders) in children and childhood apraxia of speech (CAS) often cause severe problems in articulation, chewing, swallowing and oral posture. OBJECTIVES Pathognomonic symptoms could yet not be identified, but central problems in planning, programming, timing and automating oro-facial, as well as other fine motor skills, are assumed to be affected. METHODS To investigate the nature of motor and coordinative deficits in OFD and CAS, digitomotography was applied. The testing focused on recording frequency, force, rhythm and regularity of the index finger including speeded and metronome tapping tasks. 25 children with OFD (7 girls and 18 boys, age 7.9 ± 2.3) and 5 children with CAS (0 girls and 5 boys, age 7.6 ± 2.3), and 31 healthy controls (12 girls and 19 boys, age 9.3 ± 2.2) were tested. Statistical significance was accepted at α = 0.05. ANOVA test, non-parametric Mann-Whitney U test, Kruskal-Wallis test and Spearman's rank correlation coefficient were used. RESULTS Cross-sectional data revealed consistent significant differences between children with OFD and healthy controls concerning frequency, force, rhythm and regularity of index finger tapping. Individuals with CAS showed particularly low results. Tapping results correlated with disease burden. CONCLUSION These findings support that underlying superordinated sensorimotor deficits exist. This may help phenotyping and influence diagnostical and therapeutical approaches.
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Affiliation(s)
- Friederike Stahl
- Audiology and Phoniatrics, Charité-University Medicine Berlin, Berlin, Germany.,Department of Otorhinolaryngology, University Medical Center Bonn (UKB), Bonn, Germany
| | - Dörte Pollex
- Audiology and Phoniatrics, Charité-University Medicine Berlin, Berlin, Germany
| | - Philipp Mathmann
- Audiology and Phoniatrics, Charité-University Medicine Berlin, Berlin, Germany.,Department of Phoniatrics and Pedaudiology, University Hospital Münster, University of Münster, Münster, Germany
| | - Leonie Weinhold
- Department of Medical Biometry, Informatics and Epidemiology, University Hospital, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
| | - Saskia Rohrbach
- Audiology and Phoniatrics, Charité-University Medicine Berlin, Berlin, Germany.,ENT and phoniatrics, Berlin, Germany
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13
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Chen TC, Cheng DH, Hsu ML, Lei YP. Application of masticatory control in dental treatment for elderly individuals. J Chin Med Assoc 2021; 84:125-128. [PMID: 33306597 DOI: 10.1097/jcma.0000000000000467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Taiwan transitioned to an aged society in 2018. Appropriate dental treatment is important for elderly individuals. Previously, reconstruction of the dentition was thought to help regain chewing function. However, concerns of the elderly population, such as decline in learning ability and saliva secretion, complicate dental reconstruction. Overlooking the special needs of elderly individuals may lead to impaired chewing function, resulting in nutritional imbalances and increased burden on the digestive tract, causing more health disorders. For the elderly population, treatment must be aimed at restoring as much chewing function as possible with minimal changes. Additionally, regular oral hygiene care, proper design of fixed partial dentures, and implant placement greatly reduce the difficulty in adapting to a new prosthesis. These measures allow us to provide better quality of life for elderly individuals.
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Affiliation(s)
- Ta-Chung Chen
- Division of Prosthodontics, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Dong-Hui Cheng
- Division of Prosthodontics, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Ming-Lun Hsu
- Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Yen-Ping Lei
- Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
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14
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Hellmann D, Glöggler JC, Plaschke K, Jäger R, Eiglsperger U, Schindler HJ, Lapatki BG. Effects of preventing intercuspation on the precision of jaw movements. J Oral Rehabil 2021; 48:392-402. [PMID: 33368502 DOI: 10.1111/joor.13137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Closing movements are among the jaw's basic physiological motor actions. During functional movements, the jaw changes position continually, which requires appropriate proprioception. However, the significance of the various proprioceptive receptors involved and how they interact is not yet fully clear. OBJECTIVES This study's main objective was to test whether preventing intercuspation (IC) for 1 week would affect the precision of jaw-closing movements into IC and the functional space of habitual chewing movements (HCM). A secondary objective was to compare precision of jaw-closing movements into IC with the precision of movements into a target position (TP) far from IC. METHODS Fourteen participants' HCM and jaw-closing movements into IC were recorded on two sessions (T1 and T2) 1 week apart. Between sessions, participants wore posterior bite plates to prevent IC. They also received a 10-minute training session at T1 to guide their jaw-closing movements into TP. The precision of the closing movements into IC and TP was analysed. For HCM, the vertical amplitude, lateral width and area of chewing cycles were evaluated. RESULTS The precision of jaw movements into IC increased as the jaw gap decreased, but precision did not differ significantly between T1 and T2. For HCM, the vertical amplitude and area of chewing cycles increased significantly between T1 and T2. The precision of the closing trajectory into TP increased significantly during the training session. CONCLUSION Our results confirm the excellent adaptability of the craniomandibular system, controlled by stringent motor programmes that are supported by continuous peripheral sensory input.
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Affiliation(s)
- Daniel Hellmann
- Dental Academy for Continuing Professional Development Karlsruhe, Karlsruhe, Germany.,Department of Prosthodontics, University of Würzburg, Würzburg, Germany
| | | | | | - Rudolf Jäger
- Department of Orthodontics, University of Ulm, Ulm, Germany
| | | | - Hans J Schindler
- Department of Prosthodontics, University of Würzburg, Würzburg, Germany.,Biomechanics Research Group, Institute for Mechanics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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15
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Al-Manei K, Almotairy N, Al-Manei KK, Kumar A, Grigoriadis A. Oral Fine Motor Control of Teeth Treated with Endodontic Microsurgery: A Single-Blinded Case-control Study. J Endod 2020; 47:226-233. [PMID: 33161000 DOI: 10.1016/j.joen.2020.10.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/23/2020] [Accepted: 10/28/2020] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Periodontal mechanoreceptors (PMRs) are refined neural receptors present in abundance at the root apex and have a pivotal role in oral fine motor control. This case-control study aimed to evaluate the oral fine motor control of teeth treated with endodontic microsurgery (EMS) in comparison with the control teeth using a standardized behavioral biting task. METHODS Fourteen eligible participants performed 5 trials of an oral fine motor control task that involved holding and splitting half of a peanut positioned on a force transducer with their EMS treated tooth and its contralateral control incisor tooth (28 teeth in total). The outcome variables were the mean food holding force, intra- and intertrial variability of the holding force, food splitting force, splitting duration, and the frequency of the stepwise splitting phase. The data were analyzed with parametric and nonparametric tests. RESULTS The results showed no statistically significant differences in the holding force, inter- and intratrial variability of the holding force, splitting force, or splitting duration between the teeth treated with EMS and the control (P > .05). However, there was a significantly higher frequency of stepwise ramp increase during the splitting phase with EMS treated teeth compared with the control (48% and 37%, respectively; P < .05). CONCLUSIONS EMS treated teeth showed similar force regulation and oral fine motor control as the contralateral control. The findings of this study suggest that EMS treatment does not perturb the sensory information of PMRs and maintains the force regulation and oral fine motor control of the teeth.
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Affiliation(s)
- Khaled Al-Manei
- Unit of Endodontics, Division of Oral Diseases, Department of Dental Medicine, Karolinska Institute, Huddinge, Sweden; Division of Endodontics, Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
| | - Nabeel Almotairy
- Department of Orthodontics and Pediatric Dentistry, College of Dentistry, Qassim University, Buraidah, Saudi Arabia
| | - Kholod Khalil Al-Manei
- Division of Endodontics, Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institute, Huddinge, Sweden
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institute, Huddinge, Sweden
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16
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de Mello EC, Regalo SCH, Diniz LH, Lage JB, Ribeiro MF, Bevilacqua Junior DE, Rosa RC, Ferreira AA, Ferraz MLF, Teixeira VDPA, Espindula AP. Electromyographic analysis of stomatognathic muscles in elderly after hippotherapy. PLoS One 2020; 15:e0238036. [PMID: 32853244 PMCID: PMC7451555 DOI: 10.1371/journal.pone.0238036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 08/07/2020] [Indexed: 12/29/2022] Open
Abstract
The aging process affects the entire human body, including the stomatognathic system, and can trigger not only occlusal but also postural imbalances involving other muscular chains. Hippotherapy has been used to promote cervical, postural, and balance control in individuals with diverse impairments. The present study used electromyography to evaluate the masseter and temporal muscles in an elderly population pre- and post-hippotherapy. Participants included 17 individuals, mean age 66,5±7 years. Electromyographic recording of the bilateral masseter and temporal muscles was performed during the postural resting condition and activities that involved the active participation of these muscles in different conditions. The practitioner performed no other type of activity or exercise during the intervention because the objective is to evaluate the effect of the three-dimensional movement provided by the horse. Raw electromyographic data were tabulated using commercially available software (IBM® SPSS® Statistics 234.0) and subjected to statistical analysis, in which p ≤ 0.05 was considered to be statistically significant. Post-hippotherapy, there was lower electromyographic activity for the masseter and temporalis muscles in all the static mandibular tasks, with significant effect for time for the right temporal muscle (p = 0.038), the left temporal muscle (p = 0.028) and in the all dynamic mandibular tasks for the left temporal muscle (p = 0.025) and the left masseter muscle (p = 0.027). Hippotherapy promotes a reduction in the myoelectric activity of the masticatory muscles of elderly individuals.
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Affiliation(s)
- Edneia Corrêa de Mello
- Department of Basic and Oral Biology, School of Dentistry University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
- * E-mail:
| | - Simone Cecílio Hallak Regalo
- Department of Basic and Oral Biology, School of Dentistry University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Luanna Honorato Diniz
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Janaine Brandão Lage
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Mariane Fernandes Ribeiro
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Rodrigo César Rosa
- Human Anatomy Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Alex Abadio Ferreira
- Association of Parents and Friends of the Exceptional, Uberaba, Minas Gerais, Brazil
| | - Mara Lúcia Fonseca Ferraz
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Ana Paula Espindula
- General Pathology Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
- Human Anatomy Discipline, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
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17
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Almotairy N, Kumar A, Grigoriadis A. Motor control strategies during unpredictable force control tasks in humans. J Oral Rehabil 2020; 47:1222-1232. [PMID: 32634248 DOI: 10.1111/joor.13052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/15/2020] [Accepted: 06/30/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND There are fundamental similarities and differences between the jaw and hand motor systems. However, it is unclear how the two systems respond to unpredictable task demands. OBJECTIVE To investigate and compare the force control of the jaw motor system (OMS) and the hand motor system (HMS) during unpredictable load changes. METHODS Seventeen healthy adults (24.0 ± 4.3 years) performed two standardised force control tasks (OMS and HMS). During the OMS, the participants asked to bite and pull a force transducer with the front teeth. While during HMS they pinched and pulled the same force transducer with their index and thumb fingers. Series of loads were added to a string attached to the transducer in an unpredictable (sequential and non-sequential) manner. The entire force profile during the task was divided into "initial" and "latter" segments. The force control was analysed and compared between the OMS and HMS in terms of peak force during the initial segment and holding force and force variability during the latter segment. RESULTS The peak force, holding force and force variability were higher for the OMS than the HMS (P < .001). However, there were no differences in the peak force, holding force or force variability between the sequential and non-sequential load changes (P > .05). CONCLUSIONS The results showed that unpredictable load changes did not affect the force control during the motor control task. This study suggests that both the motor systems are optimised in performing simple motor control tasks and are rather resilient to motor unpredictability.
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Affiliation(s)
- Nabeel Almotairy
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Division of Orthodontics, Department of Preventive Dentistry, College of Dentistry, Qassim University, Buraidah, Saudi Arabia
| | - Abhishek Kumar
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Anastasios Grigoriadis
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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18
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Almotairy N, Kumar A, Grigoriadis A. Effect of food hardness on chewing behavior in children. Clin Oral Investig 2020; 25:1203-1216. [PMID: 32613432 PMCID: PMC7878268 DOI: 10.1007/s00784-020-03425-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/19/2020] [Indexed: 11/28/2022]
Abstract
Objective To investigate the effects of food hardness on chewing behavior in children compared with adults. Materials and methods Healthy children (3–17 years) were equally divided into five groups based on their dental eruption stages. Each participant ate soft and hard viscoelastic test food models (3 each), while the three-dimensional jaw movements and electromyographic (EMG) activity of the bilateral masseter muscles were recorded. The data from the children were compared with a control group of healthy adults (18–35 years). The data were analyzed with nonparametric tests. Results There was no significant difference in the number of chewing cycles and the duration of the chewing sequence between children groups and adults. Children with primary dentition (3–5 years) showed shorter lateral jaw movement and higher muscle activity at the end of the chewing sequence, compared with adults. Further, children’s age-groups (3–14 years) failed to adapt their jaw muscle activity to food hardness. However, at the late-permanent dentition stage (15–17 years), children were capable of performing adult-like chewing behavior. Conclusions Overall, it seems that children as young as 3-year-old are quite competent in performing basic chewing function similar to adults. Yet, there are differences in the anticipation or adaption of jaw muscle activity and jaw kinematics to food hardness. Clinical relevance The study may have clinical implication in the diagnosis and management of children with chewing impairment associated with dental malocclusions and other orofacial dysfunctions.
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Affiliation(s)
- Nabeel Almotairy
- Unit of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Box 4064, Alfred Nobels Allé 8, 141 04, Huddinge, Sweden. .,Department of Orthodontics and Pediatric Dentistry, College of Dentistry, Qassim University, Buraidah, Saudi Arabia.
| | - Abhishek Kumar
- Unit of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Box 4064, Alfred Nobels Allé 8, 141 04, Huddinge, Sweden
| | - Anastasios Grigoriadis
- Unit of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Box 4064, Alfred Nobels Allé 8, 141 04, Huddinge, Sweden
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19
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Developmental and age-related changes in sensorimotor regulation of biting maneuvers in humans. Physiol Behav 2020; 219:112845. [DOI: 10.1016/j.physbeh.2020.112845] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 01/29/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023]
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20
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Lamba AK, Tandon S, Faraz F, Garg V, Aggarwal K, Gaba V. Effect of periodontal disease on electromyographic activity of muscles of mastication: A cross‐sectional study. J Oral Rehabil 2020; 47:599-605. [DOI: 10.1111/joor.12943] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 01/14/2020] [Accepted: 02/02/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Arundeep Kaur Lamba
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
| | - Shruti Tandon
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
| | - Farrukh Faraz
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
| | - Vibhuti Garg
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
| | - Kamal Aggarwal
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
| | - Varun Gaba
- Department of Periodontics and Oral Implantology Maulana Azad Institute of Dental Sciences New Delhi India
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21
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Al‐Manei K, Almotairy N, Bostanci N, Kumar A, Grigoriadis A. Effect of Chewing on the Expression of Salivary Protein Composition: A Systematic Review. Proteomics Clin Appl 2020; 14:e1900039. [DOI: 10.1002/prca.201900039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 11/13/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Khaled Al‐Manei
- Division of Oral DiseasesDepartment of Dental MedicineKarolinska Institutet Huddinge 14104 Sweden
- Division of EndodonticsDepartment of Restorative Dental ScienceCollege of DentistryKing Saud University Riyadh 11545 Saudi Arabia
| | - Nabeel Almotairy
- Division of Oral Diagnostics and RehabilitationDepartment of Dental MedicineKarolinska Institutet Huddinge 14104 Sweden
- SCON, Scandinavian Center for Orofacial Neurosciences Sweden
- Division of OrthodonticsDepartment of Preventive DentistryCollege of DentistryQassim University Buraidah 51412 Saudi Arabia
| | - Nagihan Bostanci
- Division of Oral DiseasesDepartment of Dental MedicineKarolinska Institutet Huddinge 14104 Sweden
| | - Abhishek Kumar
- Division of Oral Diagnostics and RehabilitationDepartment of Dental MedicineKarolinska Institutet Huddinge 14104 Sweden
- SCON, Scandinavian Center for Orofacial Neurosciences Sweden
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and RehabilitationDepartment of Dental MedicineKarolinska Institutet Huddinge 14104 Sweden
- SCON, Scandinavian Center for Orofacial Neurosciences Sweden
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22
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Grigoriadis A, Kumar A, Åberg MK, Trulsson M. Effect of Sudden Deprivation of Sensory Inputs From Periodontium on Mastication. Front Neurosci 2019; 13:1316. [PMID: 31920486 PMCID: PMC6914695 DOI: 10.3389/fnins.2019.01316] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/25/2019] [Indexed: 01/05/2023] Open
Abstract
Objective To investigate the effect of sudden deprivation of sensory inputs from the periodontium on jaw kinematics and time-varying activation profile of the masseter muscle. Methods Fourteen (age range: 22–26 years; four men) healthy and natural dentate volunteers participated in a single experimental session. During the experiment, the participants were asked to eat six hard visco-elastic test food models, three each before and after an anesthetic intervention. The movements of the jaw in three dimensions and electromyographic (EMG) activity of the masseter muscle on the chewing side were recorded. Results The results of the study showed no significant differences in the number of chewing cycles (P = 0.233) and the duration of chewing sequence (P = 0.198) due to sudden deprivation of sensory inputs from the periodontium. However, there was a significant increase in the jaw opening velocity (P = 0.030) and a significant increase in the duration of occlusal phase (P = 0.004) during the anesthetized condition. The EMG activity of the jaw closing phase was significantly higher during the control condition [116.5 arbitrary units (AU)] than anesthetized condition (93.9 AU). The temporal profile of the masseter muscle showed a biphasic increase in the excitatory muscle drive in the control condition but this increase was virtually absent during the anesthetized condition. Conclusion Sudden deprivation of sensory inputs from the periodontium affects the jaw kinematics and jaw muscle activity, with a clear difference in the time-varying activation profile of the masseter muscle. The activation profile of the masseter muscle shows that periodontal mechanoreceptors contribute to approximately 20% of the EMG activity during the jaw closing phase.
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Affiliation(s)
- Anastasios Grigoriadis
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Abhishek Kumar
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Magnus K Åberg
- Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
| | - Mats Trulsson
- Section of Oral Rehabilitation, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
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23
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Al Sayegh S, Borgwardt A, Svensson KG, Kumar A, Grigoriadis A, Christidis N. Effects of Chronic and Experimental Acute Masseter Pain on Precision Biting Behavior in Humans. Front Physiol 2019; 10:1369. [PMID: 31736787 PMCID: PMC6828929 DOI: 10.3389/fphys.2019.01369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 10/15/2019] [Indexed: 01/24/2023] Open
Abstract
Chronic pain in the orofacial region is common worldwide. Pain seems to affect the jaw motor control. Hence, temporomandibular disorders (TMD) are often accompanied by pain upon chewing, restricted mouth opening and impaired maximal bite forces. However, little is known on the effects of pain, in particular the effects of chronic jaw muscle pain on precision biting. The aim of the study was to investigate the effect of chronic and acute jaw muscle pain on oral motor control during precision biting in humans. Eighteen patients with chronic masseter muscle pain and 18 healthy participants completed the experiment. All participants were examined according to the Diagnostic Criteria for TMD. Experimental acute pain was induced by bilateral, simultaneous sterile hypertonic saline infusions into the healthy masseter muscles. A standardized hold and split biting task was used to assess the precision biting. The data was analyzed with non-parametric statistical tests. The results showed no significant differences in the hold forces, split forces, durations of split or peak split rates within or between the pain and pain-free conditions. The mean split rate increased significantly compared to baseline values both in the chronic patients and the pain-free condition. However, this increase was not evident in the experimental acute pain condition. Further, there were no significant differences in the mean split rates between the conditions. The data suggest that jaw muscle pain does not seem to alter precision biting in humans, however, the possibility that a nociceptive modulation of spindle afferent activity might have occurred but compensated for cannot be ruled out.
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Affiliation(s)
- Samaa Al Sayegh
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Annie Borgwardt
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
| | | | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Anastasios Grigoriadis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Nikolaos Christidis
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
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24
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Vibratory stimulus to the masseter muscle impairs the oral fine motor control during biting tasks. J Prosthodont Res 2019; 63:354-360. [DOI: 10.1016/j.jpor.2018.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 10/04/2018] [Accepted: 10/08/2018] [Indexed: 11/20/2022]
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25
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Ikuta M, Iida T, Kothari M, Shimada A, Komiyama O, Svensson P. Impact of sleep bruxism on training-induced cortical plasticity. J Prosthodont Res 2019; 63:277-282. [PMID: 30704929 DOI: 10.1016/j.jpor.2018.12.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/13/2018] [Accepted: 12/17/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To investigate if sleep bruxism (SB) influences training-induced cortical plasticity and performance in terms of accuracy and precision of a tooth-clenching task (TCT). METHODS Thirty-eight participants were allocated into SB group (N=19) and control group (N=19) according to presence of SB based on a 2-week screening. The participants were instructed to perform a standardized TCT for 58min at three different force levels (10%, 20% and 40% of maximum voluntary contraction; MVC) in three series (first and third without visual-feedback and second with visual-feedback). Accuracy and precision of the TCT were calculated from actual bite force values. Transcranial magnetic stimulation was applied to elicit motor evoked potentials (MEPs) from the masseter and first dorsal interosseous muscle (FDI) before the TCT (pre-TCT-session) and 5-min after the TCT (post-TCT-session). RESULTS Accuracy was significantly dependent on the series and target force level (P<0.001), however, there was a significant decrease only in the control group at 10% MVC from first to third session (P<0.001). No significant differences between groups were observed for the precision of the TCT. Masseter MEPs in the SB group in the pre-TCT-session at 120% and 160% motor threshold were significantly lower than in the control group (P<0.05). Masseter MEPs of the control group in the post-TCT-session were significantly higher than the pre-TCT-session (P<0.05) but not SB. FDI MEPs were only dependent on stimulus intensity (P<0.001). CONCLUSIONS SB is associated with significant changes not only in excitability of corticomotor control but also motor learning of jaw movements and force control.
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Affiliation(s)
- Mai Ikuta
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan; Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark
| | - Takashi Iida
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
| | - Mohit Kothari
- Hammel Neurorehabilitation Centre and University Research Clinic, Hammel, Denmark; Department of Clinic Medicine, Aarhus University, Aarhus, Denmark
| | - Akiko Shimada
- Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark; Osaka Dental University Hospital, Osaka, Japan
| | - Osamu Komiyama
- Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Japan
| | - Peter Svensson
- Section of Orofacial Pain and Jaw Function, Aarhus University, Department of Dentistry, Aarhus, Denmark; Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark; Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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26
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Fassicollo CE, Machado BCZ, Garcia DM, de Felício CM. Swallowing changes related to chronic temporomandibular disorders. Clin Oral Investig 2018; 23:3287-3296. [PMID: 30488118 DOI: 10.1007/s00784-018-2760-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 11/22/2018] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To investigate whether chronic temporomandibular disorder (TMD) patients showed any changes in swallowing compared to a control group. Moreover, it was examined whether swallowing variables and a valid clinic measure of orofacial myofunctional status were associated. MATERIAL AND METHODS Twenty-three patients with chronic TMD, diagnosed with disc displacement with reduction (DDR) and pain, according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD), and 27 healthy volunteers (control group) were compared. Surface electromyography (EMG) of the temporalis, masseter, sternocleidomastoid, and suprahyoid muscles was performed during swallowing tasks of thin liquid (10 and 15 mL) and spontaneous saliva. Data were normalized. RESULTS Compared to the control group, TMD patients showed a prolonged duration of swallowing for liquid and saliva and required a longer time to reach the activity peak and half the integral. While the overall mean value of the relative peaks was similar for the groups, the suprahyoid peak was significantly lower in the TMD group during swallowing of liquid. Moreover, TMD patients recruited the jaw elevator muscles proportionally more than controls. The orofacial myofunctional status was moderately correlated with EMG parameters. CONCLUSION Patients with chronic TMD showed temporal prolongation and changes in the relative activity of the muscles during the swallowing tasks. CLINICAL RELEVANCE The present results contribute additional evidence regarding the reorganization of muscle activity in patients with chronic TMD.
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Affiliation(s)
- Carlos Eduardo Fassicollo
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery School of Medicine of Ribeirão Preto, University of São Paulo - USP, Avenida Bandeirantes, 3900, Ribeirão Preto, SP, 14049-900, Brazil
| | | | - Denny Marcos Garcia
- Craniofacial Research Support Center, University of São Paulo - USP, Ribeirão Preto, SP, Brazil
| | - Cláudia Maria de Felício
- Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery School of Medicine of Ribeirão Preto, University of São Paulo - USP, Avenida Bandeirantes, 3900, Ribeirão Preto, SP, 14049-900, Brazil.
- Craniofacial Research Support Center, University of São Paulo - USP, Ribeirão Preto, SP, Brazil.
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27
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Development of the jaw sensorimotor control and chewing - a systematic review. Physiol Behav 2018; 194:456-465. [DOI: 10.1016/j.physbeh.2018.06.037] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 11/20/2022]
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28
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Deng H, Gao S, Lu S, Kumar A, Zhang Z, Svensson P. Alteration of occlusal vertical dimension induces signs of neuroplastic changes in corticomotor control of masseter muscles: Preliminary findings. J Oral Rehabil 2018; 45:710-719. [PMID: 29920731 DOI: 10.1111/joor.12682] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2018] [Indexed: 12/23/2022]
Abstract
PURPOSE To investigate the effect of altering occlusal vertical dimension (OVD) in patients with severe attrition on corticomotor control of the masseter muscles as assessed by navigated transcranial magnetic stimulation (nTMS). METHODS Seven patients (58.6 ± 8.4 years) with decreased OVD due to severe attrition were given mandibular occlusal splints to alter the OVD with the instruction to wear during the whole awake time for a period of four weeks. Motor-evoked potentials (MEPs) and the motor cortex maps of the masseter muscles and first dorsal interosseous (FDI) muscles as control were recorded by nTMS at baseline and at least 4 weeks after the alteration of OVD. The stimulus-response curves of MEPs were analysed with two-way repeated-measures ANOVA, and the numerical rating scale scores, motor thresholds, onset latencies, motor cortex maps and centre of gravity (COG) were analysed with paired t tests. RESULTS There was a significant increase in the amplitude of the masseter muscle MEPs (P = 0.036), but no change in the motor cortex map areas (P = 0.111) four weeks after the alteration of OVD. Furthermore, there was no significant difference in either the amplitude of the FDI muscle MEPs (P = 0.466) or the motor cortex map areas (P = 0.230) before and after OVD alteration. CONCLUSION The results suggest that alteration of OVD in patients with severe attrition was associated with signs of neuroplastic changes in the corticomotor control of the masseter muscles. The results of the study may add to our understanding of the putative mechanisms related to cortical changes in response to OVD alterations.
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Affiliation(s)
- Hongyan Deng
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Shang Gao
- Capital Medical University, Beijing, China
| | - Shengyi Lu
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark
| | - Zhenting Zhang
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Peter Svensson
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark.,Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
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29
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Grigoriadis A, Trulsson M. Excitatory drive of masseter muscle during mastication with dental implants. Sci Rep 2018; 8:8597. [PMID: 29872098 PMCID: PMC5988651 DOI: 10.1038/s41598-018-26926-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/17/2018] [Indexed: 11/23/2022] Open
Abstract
Previously we have reported a biphasic increase in excitatory drive of the masseter muscle during natural chewing in young adults. We now hypothesize that sensory inputs from the periodontal mechanoreceptors (PMRs) are responsible for the late increase in excitatory drive during this biphasic movement. 13 participants with implant-supported bridges in both jaws, and thus lacking PMRs, and 13 participants with natural dentition chewed and swallowed model food of different hardness. Electromyographic (EMG) activity of the masseter muscle was recorded, along with the position of the mandible, and the muscle activity and jaw kinematics during the different phases of the chewing cycle were analyzed. Throughout the entire masticatory sequence, the excitatory drive of the masseter muscle during the jaw closing increased in a biphasic manner for the dentate participants; whereas biphasic elevation was observed only during the middle and last segments in the implant participants. Dentate participants exhibited significantly greater boosting of the EMG activity during late jaw closing than the implant participants, irrespective of food hardness and segment of the masticatory sequence. Sensory information from PMRs are required for boosting the enhancement of masseter muscle activity during the late jaw closing, during tooth-food contact.
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Affiliation(s)
- Anastasios Grigoriadis
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.
| | - Mats Trulsson
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
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30
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Effect of short-term training on fine motor control in trigeminally innervated versus spinally innervated muscles. Hum Mov Sci 2018; 58:132-139. [PMID: 29426038 DOI: 10.1016/j.humov.2018.01.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 01/24/2018] [Accepted: 01/28/2018] [Indexed: 11/21/2022]
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31
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Kumar A, Kothari M, Grigoriadis A, Trulsson M, Svensson P. Bite or brain: Implication of sensorimotor regulation and neuroplasticity in oral rehabilitation procedures. J Oral Rehabil 2018; 45:323-333. [DOI: 10.1111/joor.12603] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/28/2017] [Indexed: 02/04/2023]
Affiliation(s)
- A. Kumar
- Division of Oral Diagnostics and Rehabilitation; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
- Scandinavian Center for Orofacial Neurosciences (SCON); Huddinge Sweden
| | - M. Kothari
- Hammel Neurorehabilitation Centre and University Research Clinic; Aarhus University; Hammel Denmark
| | - A. Grigoriadis
- Division of Oral Diagnostics and Rehabilitation; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
- Scandinavian Center for Orofacial Neurosciences (SCON); Huddinge Sweden
| | - M. Trulsson
- Division of Oral Diagnostics and Rehabilitation; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
- Scandinavian Center for Orofacial Neurosciences (SCON); Huddinge Sweden
| | - P. Svensson
- Division of Oral Diagnostics and Rehabilitation; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
- Scandinavian Center for Orofacial Neurosciences (SCON); Huddinge Sweden
- Section of Orofacial Pain and Jaw Function; Institute for Odontology and Oral Health; Aarhus University; Aarhus Denmark
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32
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Avivi-Arber L, Sessle BJ. Jaw sensorimotor control in healthy adults and effects of ageing. J Oral Rehabil 2017; 45:50-80. [DOI: 10.1111/joor.12554] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2017] [Indexed: 12/22/2022]
Affiliation(s)
- L. Avivi-Arber
- Faculty of Dentistry; University of Toronto; Toronto ON Canada
| | - B. J. Sessle
- Faculty of Dentistry; University of Toronto; Toronto ON Canada
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33
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Kumar A, Tanaka Y, Grigoriadis A, Grigoriadis J, Trulsson M, Svensson P. Training-induced dynamics of accuracy and precision in human motor control. Sci Rep 2017; 7:6784. [PMID: 28754929 PMCID: PMC5533741 DOI: 10.1038/s41598-017-07078-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/22/2017] [Indexed: 11/24/2022] Open
Abstract
The study investigated the dynamic changes in accuracy and precision during a simple oral and digital motor task involving a controlled and a ballistic force. Eighteen healthy participants participated in four experimental sessions during which they performed one hundred trials of targeting a controlled (low/high hold force) and a ballistic force during an oral and a digital motor task (OMT and DMT). Accuracy and precision across one hundred trials were calculated and subjected to segmented linear regression analysis. Repeated performance of controlled forces show a significant dynamic change in accuracy during initial stage of targeting high hold forces during OMT and a significant dynamic change in both accuracy and precision during final stage of targeting high hold forces during DMT. Repeated performance of ballistic force showed a significant dynamic change in both accuracy and precision during final stage of targeting high hold force forces during OMT and a significant dynamic change in accuracy during the initial stages of targeting high hold force during the DMT. The findings indicate a subtle degree of dissociation between accuracy and precision in terms of dynamic modulation of forces due to repeated performance of both OMT and DMT.
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Affiliation(s)
- Abhishek Kumar
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.
- SCON| Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden.
| | - Yuto Tanaka
- Department of Dentistry for Disability and Oral Health, Osaka Dental University Hospital, Osaka, Japan
| | - Anastasios Grigoriadis
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
- SCON| Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Joannis Grigoriadis
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
- SCON| Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Mats Trulsson
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
- SCON| Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
| | - Peter Svensson
- Section of Oral Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden
- Section of Orofacial Pain and Jaw Function, Institute of Odontology and Oral Health, Aarhus University, Aarhus, Denmark
- SCON| Scandinavian Center for Orofacial Neurosciences, Huddinge, Sweden
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34
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Perturbed oral motor control due to anesthesia during intraoral manipulation of food. Sci Rep 2017; 7:46691. [PMID: 28425479 PMCID: PMC5397972 DOI: 10.1038/srep46691] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 03/27/2017] [Indexed: 11/08/2022] Open
Abstract
Sensory information from periodontal mechanoreceptors (PMRs) surrounding the roots of natural teeth is important for optimizing the positioning of food and adjustment of force vectors during precision biting. The present experiment was designed to test the hypothesis; that reduction of afferent inputs from the PMRs, by anesthesia, perturbs the oral fine motor control and related jaw movements during intraoral manipulation of morsels of food. Thirty healthy volunteers with a natural dentition were equally divided into experimental and control groups. The participants in both groups were asked to manipulate and split a spherical candy into two equal halves with the front teeth. An intervention was made by anesthetizing the upper and lower incisors of the experimental group while the control group performed the task without intervention. Performance of the split was evaluated and the jaw movement recorded. The experimental group demonstrated a significant decrease in measures of performance following local anesthesia. However, there was no significant changes in the duration or position of the jaw during movements in the experimental and control group. In conclusion, transient deprivation of sensory information from PMRs perturbs oral fine motor control during intraoral manipulation of food, however, no significant alterations in duration or positions of the jaw during movements can be observed.
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