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Pazos JM, Fernandes AFRM, Verri ED, Gomes GGC, Regalo SCH, Garcia PPNS. Magnification in preclinical procedures: effect on muscle activity and angular deviations of the neck and trunk. PeerJ 2024; 12:e17188. [PMID: 38650644 PMCID: PMC11034494 DOI: 10.7717/peerj.17188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/11/2024] [Indexed: 04/25/2024] Open
Abstract
Objectives This study aimed to assess the effects of different magnification systems on the angular deviations of the neck and trunk and the muscle activities of the upper back and neck during preclinical cavity preparation. Methods This was an experimental laboratory study, with the angular deviations from the neutral positions of the neck and trunk and the activities of the bilateral upper back (the descending and ascending trapezius) and neck (sternocleidomastoid) muscles as the dependent variables. The independent variables were the different magnification systems used (Simple, Galilean, and Keplerian loupes, with direct vision as the control) and prepared teeth (teeth 16, 26, 36, and 46). A dental mannequin phantom head with artificial resin teeth was used, and Class I cavity preparations for composite resin were performed on teeth 16, 26, 36, and 46 using a 1012 round diamond bur at low speed. To analyze the angular deviations, the postures adopted during the procedure were recorded using a tripod-mounted camera positioned to provide a lateral view of the operator. A trained researcher measured the angular deviations using the software entitled "Software for Postural Assessment"-SAPO (version 0.69). Bilateral muscle activity was assessed using surface electromyography. Descriptive statistical analysis was performed, and after verifying the assumptions of normality and homoscedasticity, two-way analysis of variance and the Tukey and Games-Howell post-hoc tests were used to compare the data (α=0.05). Results The angular deviation from the neutral position of the neck was found to be significantly higher during cavity preparations performed with the naked eye and the Simple loupe, irrespective of the prepared tooth. With regard to tooth location, the angular deviation of the neck was significantly greater during cavity preparation on teeth 16 and 26, and the angular deviation of the trunk was significantly greater during cavity preparation on tooth 26, regardless of the magnification system used. There were significant differences in right sternocleidomastoid muscle activity between the Simple, Galilean, and Keplerian loupes, with activity being the lowest for the Galilean loupe (p = 0.008). There were no significant differences in left sternocleidomastoid muscle activity between the loupes, regardless of the prepared tooth (p = 0.077). The activities of the bilateral descending trapezius and the right ascending trapezius muscles were significantly lower when the Galilean loupe was used (p < 0.010). Conclusion These results suggest that the Galilean loupe resulted in lower muscle activity in the neck and back regions and that the Galilean and Keplerian loupes resulted in less angular deviations of the neck and trunk during cavity preparation.
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Affiliation(s)
- Júlia Margato Pazos
- Department of Social Dentistry, School of Dentistry of Araraquara, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil
| | | | - Edson Donizetti Verri
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Guilherme Gallo Costa Gomes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Simone Cecílio Hallak Regalo
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
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Lopes RFT, Palinkas M, Pádua da Silva G, Verri ED, Regalo IH, Gonçalves CR, Hallak JEC, Costa Gomes GG, Regalo SCH, Siéssere S. Stroke: An electromyographic approach to the masseter and temporal muscles, orofacial soft tissue pressure, and occlusal force. PLoS One 2023; 18:e0282362. [PMID: 36857404 PMCID: PMC9976995 DOI: 10.1371/journal.pone.0282362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 02/13/2023] [Indexed: 03/02/2023] Open
Abstract
Stroke is a cerebrovascular disease that triggers changes in the central and peripheral nervous systems, and can compromise human body function. This cross-sectional observational study aimed to analyze the electromyographic (EMG) activity of the masseter and temporal muscles, orofacial soft tissue pressure, and strength of occlusal contacts in patients who had suffered a stroke. Twenty-four patients were divided into two groups: stroke (n = 12) and control (n = 12). The EMG of the masseter and temporal muscles was evaluated during mandibular rest, protrusion, right laterality, left laterality, and maximal voluntary contraction. The Iowa Oral Pressure Instrument (IOPI) was used to measure pressure from the tongue, lips, and buccinator muscles. A computerized system for occlusal analysis (T-Scan III) was used to measure the occlusal contact points of the right and left hemiarches (upper and lower) and the upper and lower first molars. Data were subjected to Student's t-test (p < 0.05). The stroke group had lower normalized electromyographic activity, with a significant difference in the left temporal muscle during rest (p = 0.03) when compared to the control group. There was a significant difference between the groups in tongue pressure (p = 0.004) with a lower mean value in the stroke group. There was a significant difference between the groups in the evaluation of the occlusal contact points of the first permanent molars, with a lower mean percentage in the stroke group. The results indicate that stroke negatively affects functional performance of the stomatognathic system.
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Affiliation(s)
- Robson Felipe Tosta Lopes
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
- Faculty of Medicine of Ribeirão Preto, Department of Neuroscience and Behavioral Sciences, University of São Paulo and National Institute and Technology—Translational Medicine (INCT.TM), São Paulo, Brazil
- * E-mail:
| | - Gabriel Pádua da Silva
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Edson Donizetti Verri
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Isabela Hallak Regalo
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Camila Rosa Gonçalves
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Jaime Eduardo Cecilio Hallak
- Faculty of Medicine of Ribeirão Preto, Department of Neuroscience and Behavioral Sciences, University of São Paulo and National Institute and Technology—Translational Medicine (INCT.TM), São Paulo, Brazil
| | - Guilherme Gallo Costa Gomes
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Simone Cecílio Hallak Regalo
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
- Faculty of Medicine of Ribeirão Preto, Department of Neuroscience and Behavioral Sciences, University of São Paulo and National Institute and Technology—Translational Medicine (INCT.TM), São Paulo, Brazil
| | - Selma Siéssere
- Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, São Paulo, Brazil
- Faculty of Medicine of Ribeirão Preto, Department of Neuroscience and Behavioral Sciences, University of São Paulo and National Institute and Technology—Translational Medicine (INCT.TM), São Paulo, Brazil
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Fabrin SCV, Palinkas M, Fioco EM, Gomes GGC, Regueiro EMG, da Silva GP, Siéssere S, Verri ED, Regalo SCH. Functional assessment of respiratory muscles and lung capacity of CrossFit athletes. J Exerc Rehabil 2023; 19:67-74. [PMID: 36910685 PMCID: PMC9993009 DOI: 10.12965/jer.2244594.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 01/20/2023] [Indexed: 02/25/2023] Open
Abstract
CrossFit is a high-intensity training related to physical fitness and respiratory capacity that can promote changes in lung function. This cross-sectional study was aimed at evaluating respiratory muscle strength, electromyographic (EMG) activity, and lung capacity in CrossFit athletes. Thirty subjects aged between 25 and 35 years were divided into groups: CrossFit athletes (n=15) and sedentary individuals without comorbidities (n=15). Respiratory muscle strength was evaluated using maximal inspiratory and expiratory pressures, lung capacity, and EMG of the sternocleidomastoid, serratus anterior, external intercostal, and diaphragm muscles at respiratory rest, maximal inspiration and expiration, and respiratory cycle. Data were tabulated and subjected to statistical analyses (t-test and Spearman test, P<0.05). Respiratory muscle strength on EMG of the sternocleidomastoid, serratus, external intercostal, and diaphragm muscles at the respiratory cycle and maximal forced inspiration and expiration were higher in the CrossFit athletes group than in the sedentary group without comorbidities. CrossFit athlete group showed significantly strong positive correlation between maximal inspiratory and expiratory muscle strengths (Spearman rho= 0.903, P=0.000), with increasing muscle strength during inspiration favoring an increase in strength during expiration. The forced vital capacity (FVC) and forced expiratory volume in 1 sec (FEV1) also showed a significantly high positive correlation (Spearman rho=0.912, P=0.000) in the CrossFit athletes group, showing that higher FVC favors higher FEV1. The results of this study suggest that improved fitness is based on increased respiratory muscle strength on EMG in CrossFit athletes.
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Affiliation(s)
- Saulo Cesar Vallin Fabrin
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,Claretiano Center University, São Paulo, Brazil
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,National Institute of Science and Technology in Translational Medicine, São Paulo, Brazil
| | | | - Guilherme Gallo Costa Gomes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | | | - Gabriel Pádua da Silva
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Selma Siéssere
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,National Institute of Science and Technology in Translational Medicine, São Paulo, Brazil
| | - Edson Donizetti Verri
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Simone Cecilio Hallak Regalo
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,National Institute of Science and Technology in Translational Medicine, São Paulo, Brazil
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da Silva GP, Verri ED, Palinkas M, Gonçalves CR, Gonçalves PN, Lopes RFT, Gomes GGC, Regalo IH, Siéssere S, Regalo SCH. Impact of Hemorrhagic Stroke on Molar Bite Force: A Prospective Study. Prague Med Rep 2022; 123:181-187. [PMID: 36107446 DOI: 10.14712/23362936.2022.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Stroke is a neurological deficit of cerebrovascular origin that promotes physical impairments of adult individuals. The present study is aimed to demonstrate whether hemorrhagic stroke affects the maximum molar bite force. The prospective study carried in Centro Universitario Claretiano de Batatais, Brazil, determined the distribution of the sample into two groups: hemorrhagic stroke group (n=18, median age, 62.5 years) and disease-free group (n=18, median age, 62.0 years), with 10 men and 8 women in each group. Subjects were paired one-to-one (age and body mass index). The dynamometer was used to measure the maximum molar bite force (right and left). All analyses were performed with a significance level of 5% (Student's t-test). Differences were found on the right (p=0.048) and left (p=0.042) molar bite force, with lower bite force (both sides) in hemorrhagic stroke group. The study suggests that hemorrhagic stroke negatively affects the maximum molar bite force and necessitates changes in food intake to nutritious and softer consistency foods.
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Affiliation(s)
- Gabriel Pádua da Silva
- School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,UNIFAFIBE, Bebedouro, Brazil
| | - Edson Donizetti Verri
- Claretiano, University Center of Batatais, Batatais, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Marcelo Palinkas
- Faculty Anhanguera, Ribeirão Preto, São Paulo, Brazil. .,National Institute for Translational Medicine (INCT-TM), Ribeirão Preto, Brazil. .,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.
| | - Camila Roza Gonçalves
- Hospital do Amor, Barretos, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | | | - Robson Felipe Tosta Lopes
- School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.,UNIFAFIBE, Bebedouro, Brazil
| | | | | | - Selma Siéssere
- National Institute for Translational Medicine (INCT-TM), Ribeirão Preto, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Simone Cecilio Hallak Regalo
- National Institute for Translational Medicine (INCT-TM), Ribeirão Preto, Brazil.,School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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Gomes GGC, Palinkas M, da Silva GP, Gonçalves CR, Lopes RFT, Verri ED, Fabrin SCV, Fioco EM, Siéssere S, Regalo SCH. Bite Force, Thickness, and Thermographic Patterns of Masticatory Muscles Post-Hemorrhagic Stroke. J Stroke Cerebrovasc Dis 2021; 31:106173. [PMID: 34700235 DOI: 10.1016/j.jstrokecerebrovasdis.2021.106173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/16/2021] [Accepted: 10/10/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE Stroke is a neurological deficit of cerebrovascular origin, considered a 21st-century epidemic that causes functional changes in the human body. This study aimed to evaluate the stomatognathic system of patients after hemorrhagic stroke through the bite force, thickness, and skin temperature in the region of the masseter and temporalis muscles. MATERIAL AND METHODS Twenty-four subjects were divided into groups: post-hemorrhagic stroke; with right side of the affected body (n = 12) and without the neurological disorder (n = 12). Maximum molar bite force was verified using a digital dynamometer. Muscle thickness was measured using ultrasound images obtained at rest and during maximal voluntary contraction of the masseter and temporalis muscles. Thermographic camera was used to record the thermographic patterns of the masseter and temporalis muscles. Data were subjected to Student's t-test (P < .05). RESULTS The maximum molar bite force showed significant differences in the right (P = .04) and left (P = .03) sides, with a reduction in force in the post-hemorrhagic stroke group on the affected and unaffected sides. There was a significant difference (P < .05) in the thickness of the left temporal muscle at mandibular rest (P = .01) between groups. The post-hemorrhagic stroke group clinically presented greater muscle thickness in almost 100% of the muscles evaluated in both clinical conditions. There were no significant differences in skin temperature in the masseter and temporal muscles between the groups. CONCLUSIONS Our results suggest functional changes in the stomatognathic system of subjects after a hemorrhagic stroke, especially concerning molar bite force and masticatory muscle thickness in the temporal muscle (unaffected side).
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Affiliation(s)
- Guilherme Gallo Costa Gomes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Marcelo Palinkas
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
| | - Gabriel Pádua da Silva
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Camila Roza Gonçalves
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Robson Felipe Tosta Lopes
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Edson Donizetti Verri
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Saulo Cesar Vallin Fabrin
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Evandro Marianetti Fioco
- Department of Basic and Oral Biology, School of Dentistry of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Selma Siéssere
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
| | - Simone Cecilio Hallak Regalo
- Department of Basic and Oral Biology, National Institute and Technology - Translational Medicine (INCT.TM), School of Dentistry of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n, Bairro, São Paulo, SP 14040-904, Brazil.
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