Marcelo Palinkas

• PhD
• Researcher at University of São Paulo

Background: Physical activity improves quality of life, but competitive sports emphasize performance, leading to intense training and restrictive diets that increase injury risk. This affects the stomatognathic system, underscoring the role of sports dentistry in preventing injuries and orofacial functional changes. This observational study analyze...

Objectives Maintaining the symmetry and thickness of the lips is vital for well-being and quality of life, since disharmony, often common in the adult female population, intensifies with aging, affecting esthetic perception and orofacial function. This longitudinal study aimed to analyze orofacial tissue pressure (tongue, lips, and cheeks) before (...

CrossFit is a regular high-intensity physical conditioning exercise for skeletal striated muscles, which promotes functional changes in the human body. The study aimed to investigate the impact of CrossFit practice on the electromyographic activity of the masseter and temporalis muscles. This was an observational study. Forty subjects were divided...

This cross-sectional observational study aimed to investigate the relationship between satisfaction with facial appearance among young women, as measured by the FACE-Q tool, and facial asymmetry quantified through stereophotogrammetry. A total of 50 women aged 18 to 30 years with a normal body mass index were recruited for the study. Participants w...

Facial asymmetries, often subtle, can indicate imbalances that go beyond aesthetic concerns. Aim: This cross-sectional study analyzed molar bite force, occlusal contact distribution, and masseter and temporal muscle thickness in adult women with facial symmetry and slight non-pathological facial asymmetry, which generally goes unnoticed and is ofte...

This longitudinal study was aimed to evaluate the electromyographic activity (EMG) of the masticatory muscles during mandibular tasks in women with grade II and III obesity, who were eligible for bariatric surgery. Twenty-one patients were followed up for 3 and 6 months after the Roux-en-Y gastric bypass. The EMG included analyses of the masseter a...

Regular physical activity combined with adequate nutrition delays the loss of functional capacity and promotes healthy aging. Therapeutic horseback riding (THR) involves interactions with horses and provides physical, cognitive, and social benefits. However, the effect of THR on masticatory performance remains unclear. Therefore, this study aimed t...

Background Diagnosing asymmetries and restoring functional balance are challenges in facial rehabilitation and aesthetic procedures. This cross-sectional observational study aimed to evaluate whether occlusal imbalance and the electromyographic activity of the masseter and temporalis muscles in young women may be associated with facial asymmetry....

Rheumatoid arthritis and osteoarthritis both affect the articular cartilage, and are characterized by signs and symptoms that can affect the functions of the human body. This cross-sectional observational study evaluated electromyographic activity in the masseter and temporalis muscles, molar bite force, and mandibular mobility in adult women with...

O rugby, esporte coletivo com frequentes cenários de colisões entre os jogadores, demanda uma diversidade de movimentos que requisitam de habilidades dos membros superiores especialmente em arremessos e tackles. Em virtude da escassa literatura na investigação de aspectos de força relacionados aos membros superiores em jogadores de rugby, se faz ne...

Temporomandibular dysfunction (TMD) encompasses several conditions affecting the temporomandibular joint and jaw muscles, leading to orofacial pain and other symptoms. Botulinum toxin is a potential therapy for relieving pain, improving jaw function, and reducing the use of analgesics. This study aims to systematically illustrate the application of...

Aim This longitudinal study aimed to evaluate the electromyographic activity of the masseter and temporal muscles in adult women who underwent buccal fat removal. Materials and methods The sample consisted of 20 healthy adult women with no temporomandibular dysfunction and normal occlusion, who were assessed before, 30, and 60 days after the surge...

The presence of myofascial trigger points in the masticatory muscles can lead to pain and may be related to temporomandibular dysfunction. The dry needling technique (DN) is employed for mechanical disruption and deactivation of trigger points in skeletal muscles. The purpose of this observational longitudinal clinical study was to determine the mo...

Objetive: To investigate the maximum molar bite force in women with chronic neck pain after treatment with acupuncture. Materials and Methods: Twenty-three women with chronic neck pain participated. Dynamometer was used to measure the right and left maximum molar bite force. Dong Bang acupuncture needles - 0.25 mm x 30 mm was inserted into the inte...

This cross-sectional study examined the lower limb balance, ankle dorsiflexion, orofacial tissue pressure, and occlusal strength of rugby players. Twenty-six participants were divided into groups: rugby players (n = 13) and healthy sedentary adults (n = 13). Participants underwent an analysis of lower limb balance using a composite score (Y-Balance...

Este estudo abordou a avaliação da qualidade de vida dos estudantes universitários do curso de enfermagem em relação a pandemia da Covid-19, por meio de um questionário global. A pesquisa teve uma abordagem quantitativa, exploratória e descritiva, com a participação de 80 estudantes que cursavam enfermagem entre 2020 e 2021.

AbstractCOVID-19 pandemic can have a significant impact on an individual’s physical and emotional well-being. However, it is important to note that not all experiences of the pandemic are negative. This study aims to evaluate the perception of quality of life of students enrolled in a nursing course during the COVID-19 pandemic by administering a g...

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 pat...

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...

Dental malocclusions are deviations from normalities due to the inadequate growth and development of the dental arch which provides functional changes to the stomatognathic system. The aim of this longitudinal study was to evaluate the electromyographic activity (EMG) the masseter and temporalis muscles, strength of the orofacial tissues and occlus...

Amyotrophic lateral sclerosis is a chronic degenerative disease that affects motor neurons, thereby promoting functional changes in the human body. The study evaluated the electromyographic fatigue threshold of the masseter and temporal muscles of subjects with amyotrophic lateral sclerosis. A total of eighteen subjects were divided into two groups...

Objective To analyze the electromyographic activity (EMG) and thermographic patterns of the masseter and temporalis muscles and pressure of the orofacial tissues in individuals with intervertebral disc degeneration (IDD). Methods This study had two distinct groups: with IDD (n = 16) and controls (n = 16). EMG at rest, protrusion, right and left la...

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...

Este estudo objetivou demonstrar o cuidado mãe canguru como método humanizado entre mãe e recém-nascido prematuro e função da enfermagem neste processo assistencial. Trata-se de uma revisão bibliográfica utilizando os bancos de dados: Medline (National Library of Medicine, Estados Unidos), via PubMed, Lilacs (Literatura Latino-Americana e do Caribe...

Intervertebral disc degeneration is a pathological condition associated with the intervertebral disc and is related to functional alterations in the human body. This study aimed to evaluate the maximum molar bite force and masseter and temporal muscles thickness in individuals with intervertebral disc degeneration. Thirty-two individuals were divid...

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 mu...

Background. The aim of the study was evaluate the strength of the respiratory muscles, bite force, and occlusal force distribution of professional soccer players after training and detraining resulting from the lockdown that occurred during the coronavirus disease 2019 pandemic. Material and methods. Twelve male soccer players (age, 19-34 years) we...

Crossfit® is based on physical improvements related to strength and endurance. This study aimed to evaluate the molar bite force and masticatory muscle thickness in athletes practicing Crossfit® . This cross-sectional study included 40 participants who were divided into groups: athletes who had been practicing Crossfit® (n = 20) and healthy partici...

The aim of this study was to evaluate the stomatognathic system of individuals with controlled systemic hypertension through comparison with a disease-free control group. Seventy individuals (44 female and 26 male) were divided into two groups: a controlled systemic hypertension (n=35) and a disease-free control (n=35). The individuals were evaluat...

Low-level laser therapy has been investigated as a possible stimulus for enhancement of proliferation and differentiation of various cell types, but few reports relate undifferentiated mouse pulp cells (OD-21) response to irradiation in in vitro models. The aim of this study was to analyze the influence of low-level laser therapy (λ=660 nm), with t...

Bruxism is a common behavior in children and adolescents associated with psychosocial, biological and genetic variables, which can promotes several alterations in the structures of the stomatognathic system affecting the quality of life during childhood and adolescence. Objective: the aim of this study was to investigate a possible association betw...

The objective of this study was to investigate the effects of maternal breastfeeding, artificial feeding, types of introduction of complementary food introduction and the use of bottle and pacifier on lip /tongue pressure and maximum molar bite force of school children. Thirty-five healthy children with mixed dentition (20 boys and 15 girls), aged...

The maintenance of postural balance can be influenced by the lifestyle of a population. This study aimed to determine the electromyographic activity of the masseter and temporalis muscles during mandibular tasks and habitual and non-habitual chewing in indigenous individuals to reveal the differences among white Brazilian individuals. Sixty Brazili...

Background: CrossFit is a regular high-intensity physical conditioning exercise for skeletal striated muscles, which promotes functional changes in the human body. The aim of this study was to investigate the impact of CrossFit exercise on the electromyographic activity of the masseter and temporalis muscles. Methods: Forty participants were divide...

Musculoskeletal system impairment is a major cause of functional alterations in subjects with systemic sclerosis. Autologous hematopoietic stem cell therapy (AHSCT) may have an important role in the treatment functional of systemic sclerosis patients. The aim of this pilot study was to assess whether AHSCT interferes with the electromyographic acti...

Objective: Bruxism is a condition defined as a masticatory muscle activity with an unexplored genetic background.The aim of this study was to evaluate the association between genetic polymorphisms in ACTN3 and bruxism. Study design: A total of 151 biological-unrelated children, aged 7–12 years were included in a case control ratio of 1:1.5. The dat...

Osteoarthrosis is a disorder of synovial joints, resulting from destruction of the cartilage and subchondral bone. The present study is aimed to investigate the molar bite force, thickness and efficiency of the masseter and temporalis muscles of subjects with osteoarthrosis. A total of forty-eight subjects participated in the study. They were distr...

Bruxism is a masticatory muscle activity characterized by grinding of the teeth and clenching of the jaw that causes tooth wear and breakage, temporomandibular joint disorders, muscle pain, and headache. Bruxism occurs in both adults and children. Clinical characteristics and habits were evaluated in an adult sample. Moreover, we used DNA samples f...

The loss of teeth can produce important alterations in the stomatognathic system, affecting bone structures, oral mucosa and occlusal force. Our study aimed to evaluate the maximum molar bite force, and pressure of the tongue and lips of elderly subjects, before and after 4 months of treatment with complete dentures. Fifteen subjects were submitted...

Background: The aim of this study was to analyse the stomatognathic system of adult women with chronic allergic rhinitis by means of molar bite force and electromyographic activity of the masseter and temporalis muscles. Material and methods: A total of 26 subjects were screened and divided into two distinct groups: chronic allergic rhinitis gro...

BACKGROUND: Sleep bruxism (SB) changes the functionality patterns of the stomatognathic system. However, its severity can be an aggravating factor in the function of this complex system. AIM: The purpose of the study was to investigate the stomatognathic system of healthy subjects with different severity of SB, as determined by BiteStrip. METHODS:...

Background: Osteoarthrosis is a severe, evolutionary, chronic, and limiting disease that influences on quality of life, as it affects synovial joints and promoted degradation of hyaline articular cartilage. We sought to determine if electromyographic activity of the masticatory muscles and quality of life are negatively impacted by osteoarthrosis....

Objective: To evaluate the sternocleidomastoid and the descending portion of the trapezius muscles in terms of electromyographic activity and pressure pain threshold in women with chronic cervical pain after acupuncture treatment. Methods: Twenty-five women, aged 18-50 years [(31±3) years], with chronic neck and temporomandibular disorder partic...

Background: To evaluate the effectiveness of dry needling (DN) and instrumental myofascial release (IMR) therapies in the cervico-cranio-mandibular system through pain, bite force, and distribution of occlusal contacts in patients with muscular temporomandibular disorders. Material and methods: Thirty patients were divided into treatment groups:...

Objective: To evaluate the association of bruxism phenotypes with single nucleotide polymorphisms in FKBP5, DRD2, ANKK1, and COMT. Methods: Clinical oral examination was performed to diagnose bruxism phenotypes in 150 children. DNA was collected from saliva. Logistic univariate regression, Chi-square, and Fisher’s exact tests were performed (p < 0....

Parkinson's disease is a neurodegenerative disease with manifestations related to oxidative stress and damage to the skeletal striated musculature. This study evaluated the electromyographic fatigue of the masseter and temporal muscles in individuals with Parkinson's disease. The median frequency of the normotensive electromyographic signal was ana...

Background: The literature does not report any association between habitual snoring and sleep bruxism, but these situations can be a reason for frequent complaints of individuals, impairing the quality of life. This study was performed to investigate the sleep period and amount of habitual snoring in individuals with sleep bruxism observing expira...

The objective of the present study was to ascertain masticatory efficiency by evaluating electromyographic activity in the masseter and temporalis muscles in subjects with sleep bruxism of varying severity, as determined by BiteStrip. Thirty-four subjects with sleep bruxism were divided into two groups: a mild sleep bruxism group with a mean (± sta...

Background This study evaluated the efficiency of masticatory cycles by means of the linear envelope of the electromyographic signal of the masseter and temporalis muscles in individuals with Parkinson’s disease. Material and Methods Twenty-four individuals were assigned into two groups: with Parkinson’s disease, average ± SD 66.1 ± 3.3 years (n =...

Background Parkinson's disease is a neurological disorder that promotes motor changes in the body. Objective. The aim of this study was to investigate the impairment of the stomatognathic function regarding molar bite force, electromyographic activity, and thickness of the craniocervical muscles in patients with Parkinson's disease in comparison wi...

Background Neurodegenerative diseases that affect the cerebellum, especially in elderly individuals, cause impairment of motor coordination and quality of life. The presente study evaluated the electromyographic activity and thickness of the right and left masseter and temporal muscles, and the maximum molar bite force of individuals with spinocere...

Background Osteoporosis can make bone repair difficult. Low‐level laser therapy (LLLT) has been shown to be a promising tool for bone neoformation. This study aimed to analyze the effect of LLLT on calvaria bone defects of ovariectomized rats using stereology. Methods Fifty‐four Wistar rats were subjected to bilateral ovariectomy, and bone defects...

Objectives The objective of this research was to evaluate the effect of periodontitis on masticatory cycle efficiency and maximum molar bite force. Methods Twenty-four individuals were divided into two groups: With periodontitis (Group I; mean age ± standard deviation (SD), 51.3 ± 2.8 years; n = 12) and without periodontitis (Group II; mean age ±...

Keywords: Crawl Swimming; Electromyography; Ultrasound; Bite Force; Masticatory Muscles Swimming is considered a primordial function that enables a professional swimmer to achieve better functional performance. The present study evaluated the stomatognathic system of professional swimmers with variations in breathing techniques during crawl swimmin...

Breast cancer is the most common cancer affecting women in the world and provides functional changes in the human body. Evaluate women submitted to unilateral mastectomy, through electromyographic activity (mandibular rest, right and left laterality, protrusion, maximum voluntary contraction with and without Parafilm, habitual and non-habitual mast...

Objectives To compare the molar bite force, electromyographic activity, chewing efficiency and thickness of the masseter and temporalis muscles in individuals with amyotrophic lateral sclerosis (ALS) and healthy individuals. Material and Methods Thirty individuals enrolled in the study were divided into the study group (with ALS, n=15) and control...

Purpose: The present study evaluated electromyographic activity (EMG), masticatory performance, and tongue strength in children without and with orthodontic treatment needs. Patients and methods: A total of 90 children were screened and divided into the following groups: Group I (no treatment needed; mean age: 8.00 ± 0.43 years; n = 26), Group I...

Objectives The objective of this study was to evaluate the electromyographic fatigue of the masseter and temporalis muscles in individuals with and without osteoporosis. Methods Median frequency of the initial, mid, and final periods of the electromyographic signal in the 33 subjects with osteoporosis (OG) and 33 subjects without osteoporosis [con...

Aim: This study aimed to evaluate the electromyographic activity of the masseter and temporalis muscles of women with rheumatoid arthritis. Methods: The sample comprised 28 women divided into two groups: 14 with rheumatoid arthritis [mean age: 52.2 ± standard deviation (SD): 3 years] and 14 without rheumatoid arthritis (mean age: 49.4 ± SD: 2.4...

Background: To evaluate the EMG activity and thickness of right masseter (RM), left masseter (LM), right temporal (RT) and left temporal (LT) muscles and bite force in children with temporomandibular disorders (TMD). Material and methods: Forty five children (mean age 8.8 years; 22 boys and 23 girls) were examined on the basis of the RDC/TMD and...

Background: Zygomatic implants are an alternative treatment in the rehabilitation of atrophic maxilla to promote stability in the stomatognathic system. The aim of this study was to compare the electromyographic (EMG) activity of masseter and temporalis muscles in controls and in individuals with complete implant-supported dentures anchored in the...

This study analyzed the impact of muscular temporomandibular disorder (TMD) on masseter and temporalis muscles’ thickness. Eighty subjects (aged 21–60, both male and female) with complete dentition were divided into study (those with muscular temporomandibular disorder, n=40) and control (healthy individuals, n=40) groups. TMD classification was do...

This study analyzed the occlusal forces at the maxillo-mandibular interface and the mandibular mobility in children with and without the need for orthodontic treatment. Ninety children were divided into the following three groups based on the Dental Health Component of the Index of Orthodontic Treatment Need (IOTN-DHC): those with no need for ortho...

This case report evaluated electromyographic activity of the masseter and temporalis muscles and molar bite force, before and after with functional orthopedic. A 65 years woman presenting with orofacial pain symptoms, cervical tension, condyle subluxation and osteoarthrosis. The patient was diagnosed with temporomandibular dysfunction and treated w...

Assess whether the Lucia Jig is a device that promotes masticatory muscle relaxation in individuals with temporomandibular dysfunction. This study was carried out in three stages (interviews, clinical examination, and laboratory) and participation of adult individuals, between 21 and 40 years of age, of both genders, who replied to the RDC/TMD ques...

This study evaluated the bite force, electromyographic activity, and mandibular mobility in patients undergoing surgery for facial fracture treatment that required a coronal approach. Ten men were divided into two groups: group I, coronal approach with pre-auricular extension (n = 4, average age 34.5 years); group II, coronal approach (n = 6, avera...

Objectives: This study aimed to analyze the impact of sleep bruxism (SB) on electromyography (EMG) activity and the thickness of the masseter and temporal and maximal molar bite force. Method: Ninety individuals, aged between 18 and 45 years, were selected and divided into two groups: Group I (case group, 45 individuals with SB) and Group II (co...

Objectives: To verify the influence of prominent mandibular tori on the functioning of the stomatognathic system. Methods: The participants included 40 individuals, divided into two groups: those with mandibular tori (GI group: 20 subjects) and those without mandibular tori (GII group: 20 subjects). The authors used the Myosystem-Br1 electromyog...

To evaluate the diagnostic capability of signs and symptoms of sleep bruxism (SB) as per the American Academy of Sleep Medicine (AASM) criteria and a diagnostic grading system proposed by international experts for assessing SB. The study was conducted in three phases (interview, physical examination, and sleep studies). Subjects were asked about se...

The aim of this study was to examine the bite force and masseter and temporal muscle thickness in individuals with maxillary and mandibular osteoporosis. 72 individuals were distributed into two equal groups: (1) facial osteoporosis and (2) healthy controls. Bite force on the right and left molar regions was recorded with a dynamometer and the high...

This study aimed to examine individuals undergoing surgery for the treatment of the fractured mandibular angle, using bite force, mandibular mobility, and electromyographic (EMG) analysis in many different clinical conditions, after 2 months postoperatively. Bite force was recorded with a digital dynamometer, model IDDK. The EMG activity (Myosystem...

The masticatory process identifies the level of the individual's masticatory ability and provides important information for an adequate diagnosis of the masticatory function. The purpose of this cross-sectional study was to evaluate the influence of age on habitual and non-habitual mastication by means of the values of the ensemble average of masti...

Fractures of the zygomatic-orbital complex are related to oral and maxillofacial trauma and lead to important disorders that affect an individual from a functional and aesthetic point of view. The aim of this study was to perform a medium-term evaluation of the masticatory efficiency following the surgical reconstruction of generated fractures of m...

The Lucia jig is a technique that promotes neuromuscular reprogramming of the masticatory system and allows the stabilization of the mandible without the interference of dental contacts, maintaining the mandible position in harmonic condition with the musculature in normal subjects or in patients with temporomandibular dysfunction (TMD). This study...

The traumatic removal of the mandibular third molar may promote post chirurgic consequences such as orofacial pain and limited mandibular movements. The aim of this case report is to describe the use of an anterior bite plane and complementary therapies (low level laser therapy and acupuncture) to treat the muscular dysfunction and the painful symp...

span style="color: #221e1f; font-size: xx-small;"> A avaliação bioantropológica em remanescentes de tecidos duros pode colaborar na identificação das características físicas dos indivíduos. Os dentes, estrutura dura que também se caracteriza por ser resistente à degradação, são importantes na identificação de corpos que passaram por grandes modifi...

The present study aimed investigate the age and gender influence on maximal molar bite force and at outlining the criteria for normal masticatory muscle development in a sample of 177 Brazilian Caucasian dentate individuals aged 7-80 years divided into five age groups: I (7-12 years), II (13-20 years), III (21-40 years), IV (41-60 years), and V (61...

Objective: To analyze the electromyographic activity and muscle thickness of masseter and temporal muscles, as well as the maximum molar bite force in children with TMD. Methods: Nine three individuals aged 7-11 years-old were evaluated. Based on the Helkimo's Clinical Dysfunction Index, 45 children were assigned to 4 groups (G1- control, G2- mild...

The purpose of this study was to evaluate the influence of age on the electromyographic activity of masticatory muscles. All volunteers were Brazilian, fully dentate (except for Group I - mixed dentition), Caucasian, aged 7-80, and divided into five groups: I (7-12 years), II (13-20 years), III (21-40 years), IV (41-60 years) and V (61-80 years). E...

RESUMO: Finalidade: O objetivo deste trabalho foi verificar a atividade eletromiográfica em 18 indivíduos de ambos os gêneros submetidos a tratamento ortodôntico corretivo com a Mecânica de Edgewise, comparando um grupo controle constituído por 09 indivíduos, que ao término do tratamento ortodôntico, apresentaram uma máxima intercuspidação habitual...