Evaluation of the Therapeutic Effect of Bi-Maxillary Osteotomy Using the Stress Distribution on the Temporomandibular Joint When Doing Anterior Teeth Occlusion

2020 ◽  
Vol 142 (12) ◽  
Author(s):  
He-Di Ma ◽  
Quan-Yi Wang ◽  
Hai-Dong Teng ◽  
Ting-Hui Zheng ◽  
Zhan Liu
Keyword(s):  
Stress Distribution ◽  
Temporomandibular Joint ◽  
Temporomandibular Disorder ◽  
3D Models ◽  
Control Group ◽  
Fe Method ◽  
Sagittal Split Ramus Osteotomy ◽  
Le Fort ◽  
Anterior Teeth ◽  
Maxillary Osteotomy

Abstract The purpose of this study was to investigate how sagittal split ramus osteotomy (SSRO) and Le Fort 1 osteotomy affected the stress distribution of the temporomandibular joint (TMJ) during an anterior teeth bite using the three-dimensional (3D) finite element (FE) method. Fourteen orthognathic surgery patients were examined with mandibular prognathism, facial asymmetry, and mandibular retraction. They underwent Le Fort 1 osteotomy in conjunction with SSRO. In addition, ten asymptomatic subjects were recruited as the control group. The 3D models of the mandible, disc, and maxilla were reconstructed according to cone-beam computed tomography (CBCT). Contact was used to simulate the interaction of the disc-condyle, disc-temporal bone, and upper-lower dentition. Muscle forces and boundary conditions corresponding to the anterior occlusions were applied on the models. The stresses on the articular disc and condyle in the pre-operative group were significantly higher than normal. The contact stress and minimum principal stress in TMJ for patients with temporomandibular disorder (TMD) were abnormally higher. The peak stresses of the TMJ of the patients under anterior occlusions decreased after bimaxillary osteotomy. No postoperative TMD symptoms were found. Maxillofacial deformity led to excessive stress on the TMJ. Bimaxillary osteotomy can partially improve the stress distributions of the TMJ and relieve the symptoms of TMD.

scholarly journals Cervical and scapular instability in subjects with temporomandibular disorder

2020 ◽  
pp. 1-5
Author(s):  
Maryllian de Albuquerque Vieira ◽  
Maria das Graças Rodrigues de Araújo ◽  
Gabriel Barreto Antonino ◽  
Angélica da Silva Tenório ◽  
Maria das Graças Paiva ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Temporomandibular Disorder ◽  
Neck Disability Index ◽  
Shoulder Girdle ◽  
Masticatory Muscles ◽  
Control Group ◽  
Cervical Instability ◽  
Mobility Data ◽  
Significant Difference ◽  
Neck Disability

Background: Temporomandibular disorder (TMD) is a set of disorders involving the masticatory muscles, the temporomandibular joint (TMJ) and/or the associated structures. Objectives: To evaluate the occurrence of cervical and scapular instability in subjects with TMD. Methods: A total of 22 patients participated in the study, being 11 of them with TMD, selected using the RDC/TMD criteria, and 11 in the control group. The stabilization capacity of the neck muscles was evaluated through StabilizerTM and the muscles of the shoulder girdle through specific tests. Cervical mobility data from both groups were provided using the accelerometer while for cervical disability was used the Neck Disability Index (NDI) questionnaire. Results: Cervical instability was higher in the TMD group (20.36 ± 3.2) than in the control group (28.54 ± 0.8), revealing significant difference (p= 0.03). The highest percentages of scapular stabilization tests were found in subjects with TMD, (n= 9; 81.81%) when compared with control subjects (n= 5; 45.45%). The NDI results showed that the TMD group presented mild cervical incapacity (11.18 ± 2) and the control presented no disability (2.27 ± 0.4; p= 0.001). Conclusion: Cervical disability, and cervical and scapular instability were more frequent in subjects with TMD.

scholarly journals Evaluation of occlusal factors in patients with temporomandibular joint disorder

2012 ◽  
Vol 17 (6) ◽  
pp. 61-68 ◽  
Author(s):  
Max Dória Costa ◽  
Gontran da Rocha Torres Froes Junior ◽  
Carlos Neanes Santos
Keyword(s):  
Temporomandibular Joint ◽  
Temporomandibular Disorder ◽  
Open Bite ◽  
Control Group ◽  
Temporomandibular Joint Disorder ◽  
Posterior Teeth ◽  
Posterior Crossbite ◽  
Asymptomatic Volunteers ◽  
Anterior Guidance ◽  
Joint Disorder

OBJECTIVE: The aim of this study was to determine the prevalence and the relation between the main occlusal factors and the temporomandibular disorder (TMD). METHODS: We analyzed 100 patients (50 diagnosed with TMD and 50 asymptomatic volunteers, control group) through a questionnaire that classified TMD as absent, mild, moderate and severe. Then, an evaluation was made of intraoral occlusal factors: Absence of posterior teeth, wear facets, overjet, overbite, open bite, posterior crossbite, sagittal relationship (Class I, II and III), centric relation discrepancy for maximum intercuspation, anterior guidance and balancing occlusal interference. The c² examined the association between TMD and considered occlusal variables. RESULTS: The prevalence of studied occlusal factors was higher in patients with moderate and severe TMD. Statistically significant results were found on: Absence of five or more posterior teeth, overbite and overjet greater than 5 mm, edge-to-edge bite, posterior crossbite, Class II and III, the absence of effective anterior guide and balancing side interferences. CONCLUSIONS: Indeed, it is concluded that there is a relationship between TMD and occlusal factors, however it can not be told to what extent these factors are predisposing, precipitating or perpetuating the disease. Therefore, despite its multifactorial etiology, one can not neglect the occlusal analysis of these patients.

scholarly journals Replacement of Missing Anterior Teeth in a Patient with Temporomandibular Disorder

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Satheesh B. Haralur ◽  
Omar Saeed Al-Shahrani
Keyword(s):  
Case Report ◽  
Temporomandibular Joint ◽  
Temporomandibular Disorder ◽  
Psychological Trauma ◽  
Prosthesis Design ◽  
Mandibular Movement ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Anterior Guidance

The loss of anterior teeth leads to extreme psychological trauma, along with functional and esthetic debilitations. Healthy anterior teeth play an important role of protecting the posterior teeth during excursive mandibular movement. Loss of anterior teeth induces posterior interference with extended disocclusion time. Posterior disocclusion is critical to remove the harmful force on the teeth temporomandibular joint and eliminate muscle hypertonicity. Occlusal interference is considered as contributing factor to temporomandibular disorder (TMD) symptoms. Prosthesis design should eliminate deleterious tooth contacts. Establishing optimum anterior guidance is a key to establishing harmonious functional occlusion in addition to the correction of the esthetic and phonetic disabilities. This case report explains the steps involved in the rehabilitation of the TMD patient with loss of maxillary anterior teeth.

scholarly journals Temporomandibular joint pain and associated magnetic resonance findings: a retrospective study with a control group

2020 ◽  
Vol 9 (9) ◽  
pp. 205846012093873
Author(s):  
Elisabeth Schilbred Eriksen ◽  
Sølve Hellem ◽  
Liv Skartveit ◽  
Johan G Brun ◽  
Olav E Bøe ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Healthy Volunteers ◽  
Temporomandibular Joint ◽  
Clinical Symptoms ◽  
Temporomandibular Disorder ◽  
Mouth Opening ◽  
Staging System ◽  
Control Group ◽  
Limited Mouth Opening ◽  
Age Related

Background To better understand and evaluate clinical usefulness of magnetic resonance imaging (MRI) in diagnosis and treatment of temporomandibular disorders (TMD), parameters for the evaluation are useful. Purpose To assess a clinically suitable staging system for evaluation of MRI of the temporomandibular joint (TMJ) and correlate the findings with age and some clinical symptoms of the TMJ. Material and Methods Retrospective analysis of 79 consecutive patients with clinical temporomandibular disorder or diagnosed inflammatory arthritis. Twenty-six healthy volunteers were included as controls. Existing data included TMJ pain, limited mouth opening (<30 mm) and corresponding MRI evaluations of the TMJs. Results The patients with clinical TMD complaints had statistically significantly more anterior disc displacement (ADD), disc deformation, caput flattening, surface destructions, osteophytes, and caput edema diagnosed by MRI compared to the controls. Among the arthritis patients, ADD, effusion, caput flattening, surface destructions, osteophytes, and caput edema were significantly more prevalent compared to the healthy volunteers. In the control group, disc deformation and presence of osteophytes significantly increased with age, and a borderline significance was found for ADD and surface destructions on the condylar head. No statistically significant associations were found between investigated clinical and MRI parameters. Conclusion This study presents a clinically suitable staging system for comparable MRI findings in the TMJs. Our results indicate that some findings are due to age-related degenerative changes rather than pathological changes. Results also show that clinical findings such as pain and limited mouth opening may not be related to changes diagnosed by MRI.

scholarly journals Effect of Prolonged Endodontic Treatment on Temporomandibular Joint and Masticatory Muscles

2018 ◽  
Vol 9 (1) ◽  
pp. 38-42
Author(s):  
Aisha Wali ◽  
Talha M Siddiqui ◽  
Fatima Siddiqui ◽  
Damiya Naireen
Keyword(s):  
Temporomandibular Joint ◽  
Root Canal ◽  
Temporomandibular Disorder ◽  
Masticatory Muscles ◽  
Endodontic Treatment ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
The Social ◽  
The Status ◽  
Masticatory Apparatus

ABSTRACT Aims and objectives The objective of the study is to assess the outcome of lengthy root canal sessions (more than 2 hours) on temporomandibular joint (TMJ) and its associated structures. Materials and methods Totally, 250 patients who had undergone root canal treatment that lasted for more than 2 hours were examined for the status of TMJ and masticatory muscles. The second part of the examination was performed after 1 week to check for any pain and tenderness. Data were analyzed using Statistical Package for the Social Sciences (SPSS). Results Results showed that patients of older age suffered from more pain postoperatively. Similarly, women experienced more pain than males. Those patients who were treated for their posterior teeth complained of more pain than those treated for anterior teeth. Conclusion Prolonged root canal sessions result in longer and wider opening of mouth for longer period of time, thus causing harm to TMJ and associated masticatory structures and may give rise to sign and symptoms of temporomandibular disorder (TMD). Clinical significance It is prudent to break treatment sessions into shorter appointments and let patients relax during the treatment to prevent any extra stress on the TMJ and associated masticatory apparatus. How to cite this article Siddiqui TM, Wali A, Siddiqui F, Naireen D. Effect of Prolonged Endodontic Treatment on Temporomandibular Joint and Masticatory Muscles. World J Dent 2018;9(1):38-42.

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).

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 Retrospective Cohort Study of 45 Cases Treated With Surgery First Approach in Orthognathic Surgery and a Short Review

2020 ◽  
pp. 194338752095008
Author(s):  
Gaurav Singh ◽  
Utsav Singh Gurung ◽  
Madan Mishra ◽  
Amit Gaur
Keyword(s):  
Cohort Study ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Orthodontic Treatment ◽  
Joint Venture ◽  
Sagittal Split Ramus Osteotomy ◽  
Skeletal Malocclusion ◽  
Maxillary Osteotomy ◽  
Surgery First ◽  
Bimaxillary Protrusion

Study Design: Retrospective cohort study. Objective: The purpose of this study was to evaluate and share our experience with the surgery first approach (SFA) for correction of skeletal malocclusion. Methods: After consultation with the department of orthodontics, 45 patients with skeletal malocclusions suitable to undergo SFA were enrolled in this study (14 bimaxillary protrusion and 31 skeletal class III malocclusion). Le Fort I maxillary osteotomy, bilateral sagittal split ramus osteotomy, subapical osteotomy, and genioplasty were performed as required. After a healing period of 2 weeks, postoperative orthodontic treatment was started to achieve the final occlusion. Results: The mean duration of postoperative orthodontic treatment was 15.2 months, which is much shorter than the conventional orthodontic first approach (OFA) where presurgical orthodontic duration alone takes 12-24 months according to an individual. In the bimaxillary protrusion group, it was 18 months, which was significantly longer than for the other group ( P < .05). Conclusions: SFA offers an efficient alternative to conventional OFA with shorter total treatment duration, immediate marked improvement in facial profile, reduced biological costs, and similar operative stability. However, it comes at the cost of heightened challenges regarding case selection, accurate prediction, and surgical precision. With a joint venture between skilled and experienced surgeons and orthodontists, the outcome can be very promising.

scholarly journals Original Research. The Influence of Desquamative Gingivitis on Periodontal Health

2017 ◽  
Vol 2 (s1) ◽  
pp. 49-52 ◽  
Author(s):  
Monica Monea ◽  
Tudor Hănțoiu ◽  
Alexandra Stoica ◽  
Ramona Vlad ◽  
Alexandru Sitaru
Keyword(s):  
Alveolar Bone ◽  
Radiographic Evaluation ◽  
Control Group ◽  
Original Research ◽  
Gingival Inflammation ◽  
Periodontal Health ◽  
Painful Condition ◽  
Anterior Teeth ◽  
Attached Gingiva ◽  
The Impact

Abstract Background: Desquamative gingivitis (DG) is a non-plaque-induced, blistering and painful condition occurring most frequently on the labial aspect of the attached gingiva of anterior teeth. The incidence of DG is highest around 50 years of age, and usually indicates the presence of oral or systemic diseases. The purpose of our study was to determine the impact of DG on periodontal health by recording the plaque index, gingival index and gingival bleeding index in a group of patients with DG, compared to healthy controls. Materials and methods: Recordings of specific indices were performed in a group of 26 patients with DG and compared with 24 healthy individuals. These were followed by radiographic examinations in order to assess the loss of marginal alveolar bone. Results: The results showed that patients with DG had a statistically significant increase in periodontal indices, with more gingival inflammation and plaque retention compared to the control group (p <0.05). The highest scores for gingival inflammation were recorded in patients with DG, but on radiographic evaluation the difference was related only to gender, men being more affected by alveolar bone loss in both groups (p <0.05). Conclusions: The incidence and severity of gingival inflammation proved to be higher in patients with DG, which calls for better preventive and maintenance treatment protocols in this group of patients. Early diagnosis and initial-phase periodontal treatment are very important in preventing further tissue breakdown.

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