scholarly journals A case of craniomandibular dysfunction with open bite - Effect of the metal canine guidance on activity of the masticatory muscles.

1995 ◽  
Vol 2 (1) ◽  
pp. 49-55
Author(s):  
Takeshi Suganuma ◽  
Yoshio Yamakami ◽  
Motoo Hidaka ◽  
Akiyuki Shinya ◽  
Ryoichi Furuya ◽  
...  
Keyword(s):  
Masticatory Muscles ◽  
Open Bite ◽  
Craniomandibular Dysfunction ◽  
Canine Guidance

scholarly journals Factores etiológicos de la disfunción craneomandibular en una población de niños españoles

2018 ◽  
Vol 16 (2) ◽  
Author(s):  
María Esperanza Sánchez-Sánchez ◽  
Nuria Esther Gallardo-López ◽  
Paloma San Román-Calvar ◽  
María Isabel Vázquez-Palacios
Keyword(s):  
Masticatory Muscles ◽  
Bottle Feeding ◽  
Mouth Breathing ◽  
Open Bite ◽  
Significant Relation ◽  
Anterior Open Bite ◽  
Craniomandibular Dysfunction ◽  
Etiological Factors ◽  
Temporomandibular Joints ◽  
Permanent Molars

La Disfunción Craneomandibular (DCM) es una patología presente en niños. Este estudio ha analizado, en una muestra de 36 niños residentes en Madrid (España), la prevalencia de los factores etiológicos, así como su relación con la semiología de la DCM. Como método diagnóstico realizamos una exploración dentaria, muscular, de articulaciones témporomandibulares (ATMs), funcional y oclusal, que complementamos con un cuestionario específico. Los factores etiológicos más frecuentes fueron: la maloclusión (66,7%), el mordisqueo de uñas o bolígrafos y el uso de chupete más de 1 año (52,8% en ambos casos), seguidos de niños con personalidad nerviosa (41,7%). En el análisis estadístico hubo una relación significativa de: la lactancia artificial con el taponamiento de oídos (p=0,016) y con la ausencia de guía protrusiva (p=0,018); los traumatismos dentofaciales con las exóstosis (p=0,066); de la asimetría en la mesialización de los primeros molares definitivos con el dolor a la palpación de las ATMs (p=0, 059); de la mordida abierta anterior con el dolor a la palpación de los músculos masticatorios (p=0, 016); de la sobremordida con la ausencia de guía protrusiva (p=0,06); de la respiración bucal con el taponamiento de oídos (p=0,024); y de la presencia de enfermedad sistémica con el rechinamiento de dientes (p=0,057). Además, se halló una relación significativa de los niños con DCM severa (más de 6 síntomas/signos) y la respiración bucal (p=0,024) y la lactancia artificial (p=0,44). Abstract The craniomandibular dysfunction (CMD) is a pathology present in children. This study has analyzed in a sample of 36 children residing in Madrid (España), the prevalence of the etiological factors, as well as its relation with CMD semiology. As diagnostic method we performed dental and muscular examination, together with temporomandibular joints (TMJs) exploration, functional and occlusal examination, that we completed with our specific questionnaire. The most frequent etiological factors were: malocclusion (66,7%), nail and pen biting and pacifier sucking over 1 year old (52,8% in both cases), and kids with nervous personality (41,7%). In the statistic analysis, there was a significant relation between: bottle feeding and fullness in the ears (p=0,016) and also the lack of protrusive guide (p=0,018); dentofacial traumas and exostoses (p=0,066); the asymmetry in the mesialization of the first permanent molars and TMJ tenderness on palpation (p=0,059); anterior open bite and masticatory muscles tenderness on palpation (p=0,016); overbite and lack of protusive guide (p=0,06); mouth breathing and fullness in the ears (p=0,024); presence of sistemic desease and teeth grinding (p=0,057). In addition, a significant relation was found between children with severe CMD (more than 6 signs/symptoms) and mouth breathing (p=0,024) and bottle feeding (p=0,44). Key Words: Craniomandibular dysfunction, temporomandibular disorders, children. 

scholarly journals Neurophysiological conception of pain in craniomandibular disfunction

2008 ◽  
Vol 61 (9-10) ◽  
pp. 478-482
Author(s):  
Sasa Stankovic ◽  
Mirjana Boskovic ◽  
Zorica Ajdukovic ◽  
Ljiljana Kesic ◽  
Ljiljana Aleksov ◽  
...  
Keyword(s):  
Clinical Signs ◽  
Masticatory Muscles ◽  
Point Of View ◽  
Main Role ◽  
Craniomandibular Dysfunction ◽  
Emotional Factors ◽  
Morphological Aspects ◽  
Temporomandibular Joints ◽  
Neurophysiological Data

Introduction. Ethiopathogenesis of dysfunction and pain in temporomandibular joints has been the subject of passionate discussions between supporters of purely mechanical conception and the ones who are supporters of psyhosomatic conception. The aim of the study: Relying on neurophysiological data, the authors are trying to reveal the main role of reticular mesencephalical formation in mechanisms which provoke craniomandibular dysfunctions and confront the influence of emotional factors from neocortex and painful stimuli from oral structures. Discussion. From dynamical point of view, not only the morphological aspects of teeth and arcades, but also sensitive-sensorial mechanisms connected to masticatory muscles, periodontal structures and oral structures, should be considered. The ideal bite and perfect morphology of tooth arcades are not enough for reconstitution of correct occlusion, if there are no neuromuscular system, temporomandibular joint, and especially central nervous system. Conclusion. The presence of pain is just one of the craniomandibular dysfunction symptoms, but if it is added to the other clinical signs and emotional or affect - provoking factor, it will provoke dysfunctional syndrome.

scholarly journals Bilateral fibrodysplasia ossificans affecting the masticatory muscles and causing irreversible trismus in a domestic shorthair cat

2019 ◽  
Vol 5 (1) ◽  
pp. 205511691983985
Author(s):  
Michel Guzu ◽  
Hugues A Gaillot ◽  
Marco Rosati ◽  
Alexandra Nicolier ◽  
Philippe R Hennet
Keyword(s):  
Complete Blood Count ◽  
Mouth Opening ◽  
Masticatory Muscles ◽  
Open Bite ◽  
Fibrodysplasia Ossificans Progressiva ◽  
Nasal Discharge ◽  
Site Mutation ◽  
Anaesthesia Procedure ◽  
Splicing Site ◽  
Emergency Tracheotomy

Case summary An 8-year-old spayed female domestic shorthair cat was referred for trismus of progressive onset, which had started at least 1 month previously. The patient presented with weakness, anorexia, chronic bilateral purulent nasal discharge and concurrent reduced nasal airflow. Upon physical examination, painful mouth opening, bilateral swelling of the temporal areas, with an inability to open and close the mouth completely, were apparent. A vertical mandibular range of motion (vmROM) of 22 mm was noted. Complete blood count, biochemistry, electrolytes and various serology tests were unremarkable. CT revealed multiple mineralised lesions within the masticatory muscles. Histopathological features were consistent with those seen in the human disease fibrodysplasia ossificans progressiva (FOP). Supportive treatment did not improve the vmROM, eventually resulting in a 13 mm open bite, and total inability to close and open the mouth. Cardiac arrest occurred at the induction of an anaesthesia procedure aiming to perform tracheostomy and nasal lavage. Despite emergency tracheotomy and cardiac resuscitation, humane euthanasia was elected by the owners. Post-mortem molecular investigations highlighted a heterozygous deletion, compatible with a splicing site mutation in ACVR1, which is also associated with FOP in humans. Relevance and novel information This is the first report in the veterinary literature of FOP-like disease selectively affecting the masticatory muscles. This condition is associated with a poor prognosis, as no medical or surgical treatment has currently proven to be of any prophylactic or curative benefit. Although rare, FOP-like disease should be included in the differential diagnosis of trismus in the cat. Any further muscle injury should be avoided.

scholarly journals CLINICALEFFECTIVENESS OF OCCLUSALSPLINTS IN PATIENTS WITH FUNCTIONAL OCCLUSAL PROBLEMS

2021 ◽  
Vol 11 (1) ◽  
pp. 127-130
Author(s):  
Ekaterina Pichugina ◽  
Valery Konnov ◽  
Alexey Bizyaev ◽  
Angelica Khodorich ◽  
Ekaterina Smolyaninova ◽  
...  
Keyword(s):  
Computer Program ◽  
Temporomandibular Joint ◽  
Masticatory Muscles ◽  
Proper Treatment ◽  
Occlusal Splint ◽  
Missing Teeth ◽  
Canine Guidance ◽  
Upper Jaw

Occlusal disorders caused by missing teeth and without timely and proper treatment, lead to poorly diagnosed pathology of the masticatory muscles and the temporomandibular joint. Our study included 31 patients with dental defects, impaired canine guidance, and TMJ pathology. With a specifically developed computer program we accomplished the differentiation of various degrees of muscle and joint dysfunction in the temporomandibular joint. The results obtained by examining the patients prior to, and after the treatment, provide evidence to the effect that the modified occlusal splint has on the upper jaw.

scholarly journals Electromyographic features and efficacy of orofacial myofunctional treatment for skeletal anterior open bite in adolescents: an exploratory study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hong Hong ◽  
Yue Zeng ◽  
Xiaomin Chen ◽  
Caixia Peng ◽  
Jianqing Deng ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Morphological Characteristics ◽  
Masticatory Muscles ◽  
Open Bite ◽  
Craniofacial Morphology ◽  
Electromyographic Activity ◽  
Anterior Open Bite ◽  
Normal Occlusion ◽  
Before And After ◽  
Vertical Height

Abstract Background Due to the multifactorial aetiology and unpredictable long-term stability, skeletal anterior open bite (SAOB) is one of the most intractable conditions for orthodontists. The abnormal orofacial myofunctional status (OMS) may be a major risk factor contributing to the development and relapse of SAOB. This study is aimed at evaluating the OMS and the efficacy of orofacial myofunctional therapy (OMT) alone for SAOB subjects. Methods Eighteen adolescents with SAOB (4 males, 14 females; age: 12–18 years) and eighteen adolescents with normal occlusion (2 males, 16 females; age: 12–18 years) were selected. The electromyographic activity (EMGA) associated with mastication and closed mouth state was measured. Lateral cephalography was used to evaluate craniofacial morphology. Wilcoxon signed rank tests and t-tests were performed to evaluate myofunctional and morphological differences. Pearson or Spearman correlation analysis was used to investigate the correlations between EMGA and morphological characteristics. SAOB subjects were given OMT for 3 months, and the EMGA was compared between before and after OMT. Results During rest, anterior temporalis activity (TAA) and mentalis muscle activity (MEA) increased in SAOB subjects, but TAA and masseter muscle activity (MMA) decreased in the intercuspal position (ICP); and upper orbicularis activity (UOA) and MEA significantly increased during lip sealing and swallowing (P < 0.05). Morphological evaluation revealed increases in the FMA, GoGn-SN, ANS-Me, N-Me, L1-MP, U6-PP, and L6-MP and decreases in the angle of the axis of the upper and lower central incisors and OB in SAOB subjects (P < 0.05). TAA, MMA and anterior digastric activity (DAA) in the ICP were negatively correlated with vertical height and positively correlated to incisor protrusion. MEA was positively correlated with vertical height and negatively correlated with incisor protrusion; and the UOA showed a similar correlation in ICP, during sealing lip and swallowing. After SAOB subjects received OMT, MEA during rest and TAA, MMA and DAA in the ICP increased, while UOA and MEA decreased (P < 0.05). Conclusion SAOB subjects showed abnormal OMS features including aberrant swallowing patterns and weak masticatory muscles, which were interrelated with the craniofacial dysmorphology features including a greater anterior facial height and incisor protrusion. Furthermore, OMT contributes to OMS harmonization, indicating its therapeutic prospect in SAOB.

scholarly journals Electromyographic activity of the masseter muscle in individuals with group function and canine guidance

2021 ◽  
Vol 15 (4) ◽  
pp. 232-238
Author(s):  
Nathália de Oliveira Domingos ◽  
Roberto Bernardino Júnior ◽  
Patrícia Teixeira de Carvalho Gaspar ◽  
Frederico Balbino Lizardo ◽  
César Ferreira Amorim ◽  
...  
Keyword(s):  
Clinical Evidence ◽  
Masticatory Muscles ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Group Function ◽  
Canine Guidance ◽  
Student’S T ◽  
The Right ◽  
Masseter Muscles ◽  
Student’S T Test

Background. There is no general consensus in restorative dentistry about which lateral guidance should be established. Some studies have shown that canine guidance decreases the tension of masticatory muscles. Others have reported that group function might achieve a better physiologic distribution of occlusal forces. Also, some reports have shown that both guidances are equally acceptable. Despite all discussions, clinical evidence of one guidance being superior to another is limited. Thus, this study aimed to analyze the electromyographic (EMG) activity of masseter muscles in individuals with group function and canine guidance. Methods. Twenty volunteers of both genders, aged 20-25, were divided into two groups: GF (group function guidance, n=10) and CA (canine guidance, n=10). EMG activity of masseters was captured using surface electrodes during habitual maximum intercuspation (HMI) and right and left lateral jaw movements and recorded using EMG amplitude values (RMS – root means square). Student’s t-test was used to compare mean RMS values between the groups and lateral movements in each group. Results. During HMI, there was no difference in masseter EMG activity between the groups. Both masseters showed higher activity in group GF only on the right side during lateral movements, while the left masseter exhibited higher activity on the nonworking side in both groups. The activity of both masseters distributed by tooth was higher in group CA. Conclusion. During tooth restorative procedures, any guidance is acceptable considering HMI. However, group function guidance is more favorable during lateral movements due to greater dissipation of occlusal pressures.

scholarly journals EVALUATION OF CEPHALOMETRIC ANALYSIS IN PATIENTS WITH BILATERAL CONDYLAR RETROPOSITION IN TEMPOROMANDIBULAR DYSFUNCTION

2020 ◽  
Vol 20 (3) ◽  
pp. 41-46
Author(s):  
V.V. Vovk ◽  
V.P. Nespriadko
Keyword(s):  
Temporomandibular Joint ◽  
Test Group ◽  
Masticatory Muscles ◽  
Control Group ◽  
Cephalometric Analysis ◽  
Temporomandibular Joint Dysfunction ◽  
Mandibular Growth ◽  
Facial Skull ◽  
Condylar Position ◽  
Canine Guidance

Relevance. During the dentoalveolar growth and development, the direction and growth type of facial skull play a very important role. Development of esthetical symmetry, functional relationship, and clinical disharmony depends on skull parameters. Temporomandibular joint dysfunction is one of the most common diseases nowadays. That is why early identification of risk factors is among the priorities. This study aimed at evaluating occlusional and skeletal specific characteristics in patients with temporomandibular joint dysfunction, comparing different cephalometric findings and CT findings relating to condylar position. Materials and methods. The study included 45 individuals. The study group consisted of 26 patients with bilateral condylar retroposition. Control group was made up of 19 patients. The participants underwent clinical examination, functional testing, palpation of masticatory muscles, occlusion diagnosis by applying Baush articulating film 200,100,8 microns, cephalometric analysis: Tweed, Kim, Jarabak, Ricketts, computed tomography of temporomandibular joint. Statistical analysis was carried out by the program IBM SPSS Statistic Base v.22. Results. There were no pathological contacts during evaluation of static and dynamic occlusion, laterotrusion as «canine guidance». The patients of the test group had bilateral posterior joint fissure reduced right-median 1,96, left-median 1,81. In control group the position was right-average 2,75 and left-median 2,67 The patients in the control and test groups the indices Tweed <FMA average were 19,6°/ median 21,7°; <IMPA average 97,9°/ median 97,8°; Kim ODI median was 68,9°/73,74°; Ricketts Overbite median 2.1 mm /1,9 mm, Overjet median was 2,9 mm /2,85 mm, PM-Xi-ANS median was 44,1°/43,75°, <NPog-FH median was 91°/86,85°,<NBa-PtGn median was 91,1°/90,1°, <MeGo-FH median was 18,7°/22,4°; Jarabak <N-S-Ar average was 127,2°/125,6 °. Conclusions. In the patients with bilateral condylar retropositionm the joint fissure is reduced. Cephalometric analysis demonstrated the following: Tweed <FMA, <IMPA; Kim ODI; Ricketts Overbite, Overjet, PM-Xi-ANS, <MeGo-FH; Jarabak <N-S-Ar can not be used as diagnostic criteria of bilateral condylar retroposition. Ricketts <NPog-FH in the test group showed the mandibular retroposition, but with normal type of mandibular growth <NBa-PtGn. It can be used as one of the primary cephalometric diagnostic indicator of bilateral condylar retroposition.

Sur les Open-Bite avec infraclusion

2006 ◽  
Vol 40 (3) ◽  
pp. 283-287
Author(s):  
Boris Terk
Keyword(s):  
Open Bite

DISTRIBUSI MALOKLUSI BERDASARKAN KLASIFIKASI ANGLE PADA PASIEN DI DEPARTEMEN ORTODONSIA RSGMP FKG USU TAHUN 2009-2013

2015 ◽  
Vol 18 (3) ◽  
pp. 257-261
Author(s):  
Mimi Marina Lubis ◽  
Andira Retno Utami
Keyword(s):  
Open Bite ◽  
Deep Bite ◽  
Purposive Sampling

Maloklusi merupakan masalah kesehatan mulut dengan prevalensi tertinggi ketiga setelah karies dan penyakitperiodontal. Distribusi maloklusi menunjukkan hasil yang berbeda-beda dengan prevalensi cukup tinggi pada setiappopulasi di dunia. Tujuan penelitian ini adalah untuk mengetahui distribusi maloklusi berdasarkan klasifikasi Angle danmelihat apakah terdapat perbedaan antara laki-laki dan perempuan. Jenis penelitian ini adalah penelitian deskriptifmenggunakan 385 rekam medik dan model studi pasien di Departemen Ortodonsia RSGMP FKG USU tahun 2009-2013. Pemilihan sampel dilakukan menggunakan metode purposive sampling berdasarkan kriteria inklusi dan eksklusi.Hasil penelitian menunjukkan 41,55 % sampel memiliki hubungan molar Klas I Angle, 26,75 % Klas II subdivisi, 18,44% Klas II divisi 1, 5,71 % Klas III subdivisi, 4,67 % Klas II divisi 2 dan 2,85 % Klas III. Bentuk maloklusi yang palingumum adalah crowding rahang bawah 49,61 %, crossbite anterior 30,90 % dan spacing rahang atas 21,55 %. Sebanyak40,25 % sampel memiliki overjet normal, 19,48 % overjet berlebih, 69,61 % overbite normal, 14,02 % deep bite, 9,35 %edge to edge dan 7,79 % open bite. Deep bite menunjukkan adanya perbedaan distribusi berdasarkan jenis kelamin.

Signs and symptoms of craniomandibular dysfunction in a population of Spanish children

2018 ◽  
Vol 16 (1) ◽  
pp. 24
Author(s):  
Maria Esperanza Sánchez-Sánchez
Keyword(s):  
Signs And Symptoms ◽  
Permanent Teeth ◽  
Tooth Sensitivity ◽  
Craniomandibular Dysfunction ◽  
Teeth Grinding ◽  
Specific Questionnaire ◽  
Other Hand ◽  
Opening And Closing

The craniomandibular dysfunction (CMD) is a pathology that can appear at early ages. In a sample of 36 childrenresiding in Madrid (Spain), of both sexes, with ages between 7 and 13 years, the prevalence of signs and symptomsof CMD was analyzed. For that purpose, we did a dental and muscular examination, together with temporomandibularjoints, functional and occlusal examination, and completed with a specific questionnaire. The results revealedthat 100% showed some sign or sympthom of CMD. 77,8% of the pacients presented 3 or more CMD signs.The most prevalent were painful muscle palpation (94,4%), together with sliding anteriorly (91,7%), painful jointpalpation (69,4%), wear facets in permanent teeth (41,7%) and altered opening and closing trayectory (38,9%). Onthe other hand, only 38,9% showed any CMD symptom. The most prevalent symptoms were night teeth grinding(27,8%), followed by tooth sensitivity (19,4%) and fullness in the ears (16,7%). We conclude that in our sample,25% presented mild CMD (less that 3 signs or symptoms), 58,3% presented moderate CMD (from 3 to 6 signs orsymptoms) and 16,7% showed severe CMD (more than 6 symptoms). Nevertheless, it’s important to remark thatnone of these pacients came seeking treatment for his CMD and these symptoms were refered only when beingasked. Hence the importance of a comprehensive clinic history to precociously diagnose this pathology and havethe ability to prevent its progression.

Sign in / Sign up

Export Citation Format

Share Document