scholarly journals Temporomandibular joint and orthodontics –A contemporary review

2021 ◽  
Vol 7 (2) ◽  
pp. 123-127
Author(s):  
Shreya V Mishra ◽  
Rohit Kulshrestha ◽  
Ragni Tandon ◽  
Ashish Chauhan ◽  
Pratik Chandra ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Present Article ◽  
Temporomandibular Disorders ◽  
Adverse Reactions ◽  
Synovial Joint ◽  
Orthodontic Appliance ◽  
Condylar Cartilage ◽  
Orthodontic Therapy ◽  
Delicate Balance

The Temporomandibular joint is an atypical synovial joint that is dynamic in structure. A delicate balance between the musculature, the condylar cartilage and the bony structures is maintained for harmonious functioning of the joint. Over the years the role of occlusion in temporomandibular disorders (TMD) has been extensively debated, leading to many opinions and much controversy. The changes in the joint caused in response to orthodontic therapy as well the adverse reactions caused have been studied. The present article is a review on the effects of Orthodontic appliance therapy on the joint and the present modalities opted to treat the joint disorders.

scholarly journals Spry1 and Spry2 Are Essential for Development of the Temporomandibular Joint

2012 ◽  
Vol 91 (4) ◽  
pp. 387-393 ◽  
Author(s):  
P. Purcell ◽  
A. Jheon ◽  
M.P. Vivero ◽  
H. Rahimi ◽  
A. Joo ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Mandibular Condyle ◽  
Glenoid Fossa ◽  
Synovial Joint ◽  
Rtk Signaling ◽  
Mandibular Fossa ◽  
Main Components ◽  
Disc Formation

The temporomandibular joint (TMJ) is a specialized synovial joint essential for the function of the mammalian jaw. The main components of the TMJ are the mandibular condyle, the glenoid fossa of the temporal bone, and a fibrocartilagenous disc interposed between them. The genetic program for the development of the TMJ remains poorly understood. Here we show the crucial role of sprouty ( Spry) genes in TMJ development. Sprouty genes encode intracellular inhibitors of receptor tyrosine kinase (RTK) signaling pathways, including those triggered by fibroblast growth factors (Fgfs). Using in situ hybridization, we show that Spry1 and Spry2 are highly expressed in muscles attached to the TMJ, including the lateral pterygoid and temporalis muscles. The combined inactivation of Spry1 and Spry2 results in overgrowth of these muscles, which disrupts normal development of the glenoid fossa. Remarkably, condyle and disc formation are not affected in these mutants, demonstrating that the glenoid fossa is not required for development of these structures. Our findings demonstrate the importance of regulated RTK signaling during TMJ development and suggest multiple skeletal origins for the fossa. Notably, our work provides the evidence that the TMJ condyle and disc develop independently of the mandibular fossa.

scholarly journals The impact of occlusal support on temporomandibular disorders: a literature review

2021 ◽  
pp. 201010582110237
Author(s):  
Minh Son Nguyen ◽  
Mare Saag ◽  
Triin Jagomägi ◽  
Quang Hai Nguyen ◽  
Ülle Voog-Oras
Keyword(s):  
Temporomandibular Joint ◽  
Temporomandibular Disorders ◽  
Temporomandibular Disorder ◽  
Aetiological Factor ◽  
Posterior Teeth ◽  
Number Of Teeth ◽  
Osseous Changes ◽  
Masticatory System ◽  
The Impact

Temporomandibular disorders are a multifactorial disease. Occlusal support and the number of teeth in dentition have significant effects on the masticatory system. The current study aims to review the role of occlusal support in association with findings of temporomandibular disorders. Data sources were PubMed, Web of Science and Google Scholar, with 1411 citations published over the period 1992–2019. The selection criteria stipulated that articles must have reported the association between the number of teeth, occlusal unit, occlusal support and temporomandibular disorders. A total of 15 full-text articles was finally accessed for eligibility in the current review. The studies on temporomandibular disorders were collected from various sources, including articles reporting temporomandibular disorder symptoms ( n=1), temporomandibular disorder signs ( n=5), temporomandibular joint osseous changes ( n=1), temporomandibular joint dysfunction using the Helkimo index ( n=2), and temporomandibular disorder classification ( n=6). Of these articles, significant associations were found between: the number of missing teeth and temporomandibular disorders ( n=5); the number of occlusal units and occlusal supports and temporomandibular disorders ( n=3); the position of the lost occlusal units and temporomandibular disorders ( n=1). Loss of the occlusal unit has more impact on temporomandibular disorders than the loss of posterior teeth. The total loss of unilateral occlusal support seems to be an aetiological factor for temporomandibular disorders, and maintenance of balanced posterior occlusal support has a role in the prevention and management of temporomandibular disorders.

Asociación entre hábitos parafuncionales de la cavidad bucal y los transtornos temporomandibulares en adolescentes

2018 ◽  
Vol 10 (2) ◽  
Author(s):  
Gabriel Muñoz Quintana
Keyword(s):  
Oral Cavity ◽  
Temporomandibular Joint ◽  
Temporomandibular Disorders ◽  
Temporomandibular Disorder ◽  
Neuromuscular System ◽  
Jaw Movements ◽  
Nail Biting ◽  
Palabras Clave ◽  
Masticatory System ◽  
Objective Being

La musculatura del sistema masticatorio y la articulación temporomandibular (ATM) están protegidos por reflejos nerviosos básicos y sistema neuromuscular a través de la coordinación de fuerzas musculares, todo lo que produce sobrecarga muscular repetitiva como los hábitos parafuncionales (HPF) pueden ocasionar trastornos temporomandibulares (TTM)1. Los HPF se caracterizan por movimientos anormales a la función mandibular normal sin objetivo funcional, al estar alterados constituyen una fuente productora de fuerzas traumáticas caracterizadas por dirección anormal, intensidad excesiva y repetición frecuente y duradera (Rolando Castillo Hernández, 2001)4. El objetivo del estudio fue identificar la asociación entre la presencia de hábitos parafuncionales de la cavidad bucal y los TTM en adolescentes de la ciudad de Puebla. Estudio observacional descriptivo. Se incluyeron 258 adolescentes, 132 (51.2%) mujeres y 126 (48.8%) hombres, con una edad promedio de 12.5±.73 y quienes fueron diagnosticados con los CDI/TTM y los HPF fueron auto-reportados por los pacientes. Se encontró una prevalencia de los TTM del 39.9% y una prevalencia de HPF del 86%. Los HPF más frecuentemente reportados fueron la succión labial y la onicofagia. Se encontró una asociación significativa (x2=7.31, p=0.007) entre los hábitos parafuncionales y los TTM en adolescentes. Palabras clave: Trastornos temporomandibulares, hábitos parafuncionales, adolescentes, articulación temporomandibular. Abstract The muscles of the masticatory system and temporomandibular joint (TMJ) are protected by basic nerve reflex and neuromuscular system through the coordination of muscle forces, all that repetitive muscle overload occurs as habit parafunctional (HPF) can cause temporomandibular disorder TMD)1. The characteristics of HPF are abnormal jaw movements without a functional objective. Being the jaw movements altered, they constitute a source of traumatic forces with an abnormal direction, excessive intensity and long-lasting and frequent duration. (Rolando Hernandez Castillo 2001)4. Objective: was to identify the association between the presences of parafunctional habits of the oral cavity and TMD in adolescents in the Puebla city in Mexico. Material and methods: Is a observational study, we included 258 adolescents 132 (51%) females and 126 (48.8%) were men, mean age 12.5±.73 and who were diagnosed with CDI/TTM and HPF were self- reported by patients. Results: The prevalence of TMD was 39.9% and a prevalence of 86% HPF. The most frequently reported HPF were lip sucking and nail biting. We found a significant association (x2= 7.31, p = 0,007) between HPF and TMD in adolescents. Key words: Parafunctional habits of oral cavity, temporomandibular disorders, temporomandibular joint. (Odontol Pediatr 2011;10(2): 90-94).

Stages of the formation of temporary and permanent occlusion and the impact of early tooth extraction on the dentition state. Literature review

2019 ◽  
pp. 22-24
Author(s):  
G.A. Murachueva ◽  
I.M. Rasulov ◽  
S.G. Gusenov
Keyword(s):  
Literature Review ◽  
Temporomandibular Joint ◽  
Tooth Extraction ◽  
Physiological State ◽  
Review Of The Literature ◽  
Full Development ◽  
Permanent Occlusion ◽  
The Impact

A review of the literature on the stages of the formation of temporary and permanent occlusion has been performed. This stages play an important role not only for the full development of the maxillofacial apparatus, temporomandibular joint, but also the whole organism. The role of early tooth extraction in the formation of the physiological state of the dentoalveolar system is considered. The conclusion is drawn about the need for a deeper study of this problem in the structure of general dental morbidity.

An approach to the clinical manifestation of Rupavriddhi Rupahani Rupantara in Avarana

2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Dr. Sharanamma . ◽  
Dr. A. S. Prashanth ◽  
Dr. S. G. Chavan
Keyword(s):  
Clinical Practice ◽  
Clinical Study ◽  
Present Article ◽  
Clinical Manifestation ◽  
Basic Concept ◽  
Favorable Condition ◽  
Wrong Diagnosis

Ayurveda believes in different pathology which sets in different Srotas to produce different diseases. Whenever a favorable condition and situation arise, diseases will manifest. Nanatmaja Vikara, Anubandha, Gatavata and Avarana are different pathologies explained in Ayurveda. Avarana is one of the most difficult concept to understand teach and incorporate in clinical practice. It is either least observed, diagnosed or goes unidentified due to lack of skill. To understand and analyze the Avarana, Meticulous knowledge of basic concept of Ayurveda is essential. It is assumed that symptoms complex in Avarana leads to misunderstanding, wrong diagnosis and sometimes end with complications. The symptoms produced in Avarana are based on the principles of Rupahani (Karmakshaya), Rupavriddi (Karmavriddhi) and Rupantara (Anya Karma). The present article is an attempt made to have a critical clinical study of role of Avarana in the manifestation of Rupavriddhi, Rupahani, Rupantara.

scholarly journals The Role of lncRNA in the Development of Tumors, Including Breast Cancer

2021 ◽  
Vol 22 (16) ◽  
pp. 8427
Author(s):  
Beata Smolarz ◽  
Anna Zadrożna-Nowak ◽  
Hanna Romanowicz
Keyword(s):  
Breast Cancer ◽  
Breast Carcinoma ◽  
Present Article ◽  
Noncoding Rnas ◽  
Long Noncoding Rnas ◽  
Regulation Of Transcription ◽  
Ribonucleic Acids ◽  
Detailed Review ◽  
Cellular Processes

Long noncoding RNAs (lncRNAs) are the largest groups of ribonucleic acids, but, despite the increasing amount of literature data, the least understood. Given the involvement of lncRNA in basic cellular processes, especially in the regulation of transcription, the role of these noncoding molecules seems to be of great importance for the proper functioning of the organism. Studies have shown a relationship between disturbed lncRNA expression and the pathogenesis of many diseases, including cancer. The present article presents a detailed review of the latest reports and data regarding the importance of lncRNA in the development of cancers, including breast carcinoma.

scholarly journals Temporomandibular Disorders and Bruxism Prevalence in a Portuguese Sample

2021 ◽  
Vol 5 (1) ◽  
pp. 37
Author(s):  
João Belo ◽  
André Almeida ◽  
Paula Moleirinho-Alves ◽  
Catarina Godinho
Keyword(s):  
Temporomandibular Joint ◽  
Temporomandibular Disorders ◽  
Temporomandibular Disorder ◽  
Masticatory Muscles ◽  
Diagnostic Aspects ◽  
Relevant Role

Temporomandibular disorder (TMD) encompasses a set of disorders involving the masticatory muscles, the temporomandibular joint and associated structures. It is a complex biopsychosocial disorder with several triggering, predisposing and perpetuating factors. In the etiology of TMD, oral parafunctions, namely bruxism, play a relevant role. The study of bruxism is complicated by some taxonomic and diagnostic aspects that have prevented achieving an acceptable standardization of diagnosis. The aim of this study was to analyze the prevalence of temporomandibular disorders and bruxism in a Portuguese sample.

scholarly journals A room with a view: a special issue with a special perspective

2021 ◽  
Vol 26 (3) ◽  
pp. 205-210
Author(s):  
Simone Borghesi
Keyword(s):  
Climate Change ◽  
Developing Countries ◽  
Climate Policy ◽  
Present Article ◽  
Emerging Economies ◽  
Emissions Trading ◽  
Developed Countries ◽  
Special Issue ◽  
Climate Policies

AbstractThe present article describes the main insights deriving from the papers collected in this special issue which jointly provide a ‘room with a view’ on some of the most relevant issues in climate policy such as: the role of uncertainty, the distributional implications of climate change, the drivers and applications of decarbonizing innovation, the role of emissions trading and its interactions with companion policies. While looking at different issues and from different angles, all papers share a similar attention to policy aspects and implications, especially in developing countries. This is particularly important to evaluate whether and to what extent the climate policies adopted thus far in developed countries can be replicated in emerging economies.

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