1/26. Electromyographic activity of the jaw-closing muscles before and after unilateral coronoidectomy performed on a patient with coronoid hyperplasia: a case study.There have been few reports analyzing the activity of the jaw-closing muscles after coronoidectomy performed on a patient with coronoid hyperplasia. This paper presents a case study using electromyograms (EMGs) to evaluate the effects of unilateral coronoidectomy on the activity of masseter and temporal muscles. The patient was a 25-year-old male whose maximal range of jaw opening was 24 mm. After coronoidectomy of the left region, the range improved to 43 mm. EMGs were recorded in the center of the masseter muscles and the anterior part of the temporal muscles during gum chewing. Preoperatively, no abnormal EMG activity was observed. Eight months after surgery, increase in the ratio of the bilateral temporal muscle activity and a decrease in the ratio of the right masseter muscle activity were observed, and the proportion of activity of jaw closing muscles was out of the normal range. Eighteen months after surgery, there was slight return to the preoperative EMG activity. It was concluded that unilateral coronoidectomy could result in EMG changes of masseter and temporal muscles with a gradual return.- - - - - - - - - - ranking = 1keywords = jaw (Clic here for more details about this article) |
2/26. Neonatal permanent jaw constriction because of oral synechiae and Pierre Robin sequence in a child with van der Woude syndrome.OBJECTIVE: To report a newborn with van der Woude syndrome, Pierre Robin sequence, and oral synechiae. Pierre Robin sequence is a rare manifestation of van der Woude syndrome as are oral synechiae. We speculate that the oral synechiae may be causally related to the development of Pierre Robin sequence in this patient.- - - - - - - - - - ranking = 0.57142857142857keywords = jaw (Clic here for more details about this article) |
3/26. Chronic dental infections mimicking temporomandibular disorders.BACKGROUND: trismus and jaw pain are not only caused by temporomandibular disorders (TMD), but also by various pathologies, namely infection, trauma, or neoplasms. TMD-like symptoms, as a result of the pathologies, may be confusing to a clinician. This paper reports two cases of chronic dental infection mimicking TMD. methods: Two patients were initially diagnosed with, and treated for, TMD. However the patients did not respond to the treatment. Limited range of motion and jaw pain were then clinically evaluated for differential diagnoses. Laboratory examinations and computerized tomography (CT) scans were carried out to disclose any underlying lesion. RESULTS: Laboratory examination, such as, c-reactive protein helped to detect latent infection. CT scans revealed insidious chronic dental infection imitating TMD. Surgical drainage and chemotherapy resolved the symptoms. CONCLUSION: The importance of a rational diagnostic process, including clinical and laboratory examinations and radiologic imaging, cannot be over-emphasized in elucidating true cause of the symptoms.- - - - - - - - - - ranking = 0.28571428571429keywords = jaw (Clic here for more details about this article) |
4/26. trismus in a 6 year old child: a manifestation of leukemia?trismus is a firm closing of the jaw due to tonic spasm of the muscles of mastication from disease or the motor branch of the trigeminal nerve. trismus may be produced by a variety of reasons such as dental abscess, trauma, following mandibular block with local anesthesia, as a result of radiation to the facial muscles, and patients after chemotherapy. A case of a referral of a six-year-old boy to a dentist from an ENT due to severe limitation in jaw opening is presented. Intraoral examination and panoramic radiograph demonstrated no signs of infection and/or other pathology. After a diagnosis of trismus was made, due to his icteric appearance, the general fatigue and loss of appetite in the last few days, palpated and sensitive lymph nodes in the submandibular and cervical regions, the child was referred for a complete blood count and sedimentation rate. The laboratory and clinical findings resulted in the diagnosis of acute lymphoblastic leukemia (ALL). Dental and oral manifestations of ALL are discussed, and the trismus may be explained by an intensive infiltration of leukemic cells into the deep portion of the contracting muscles of the face. This case emphasizes the importance of physical examination and independent judgement made by dentists, even when patients are referred to them by other members of the medical communities.- - - - - - - - - - ranking = 0.28571428571429keywords = jaw (Clic here for more details about this article) |
5/26. Modified use of a dynamic bite opener--treatment and prevention of trismus in a child with head and neck cancer: a case report.trismus may be a complication arising during or after treatment of patients with head and neck cancer. Treatment of trismus is difficult, making prevention very important. To prevent and treat trismus in a patient with a nasopharyngeal tumor, the Contract-Relax-Antagonist-Contract (CRAC) technique was applied, with the aid of a custom-made dynamic bite opener (DBO). The CRAC technique in combination with the DBO, as a therapy/prevention program for trismus, is not referred to in the literature. The combination of CRAC and DBO appeared to be a gentle and effective method well tolerated by the patient.- - - - - - - - - - ranking = 0.026099485263497keywords = bite (Clic here for more details about this article) |
6/26. Congenital trismus secondary to masseteric fibrous bands: a 7-year follow-up report as an approach to management.A 7-year prospective follow-up report, which was previously presented in this journal as an initial pediatric case report, is presented as an approach to management of congenital trismus secondary to masseteric fibrous bands. Adams and Rees discussed management, including endoscopic exploration at 18 months of age with early recurrence of trismus. Under the care of the same plastic surgeon and his team, the progress of this patient over 7 years has given us an insight into management. The cause of trismus is not fully elucidated, but the condition can result in compromised caloric intake, speech development, facial appearance, dental care, and oral hygiene. The decreased oral opening may be secondary to shortening of the muscles of mastication, which may cause tension moulding and distortion of the coronoid process; yet, there is no consensus on the optimal management of temporomandibular joint trismus and all its causes. The patient presented in this report, now aged 7 years, has proceeded through to open surgery on two occasions yet, regrettably, has persistently tight masseter muscles and only 8 mm of jaw opening.- - - - - - - - - - ranking = 0.14285714285714keywords = jaw (Clic here for more details about this article) |
7/26. Free flap transfer for closure and interposition-arthroplasty in noma defects of the lateral face associated with bony ankylosis.noma defects of the anterolateral face are often associated with fibrous or bony ankylosis fusing the mandibula to the skull base. According to the extent of the ankylosis, the temporomandibular joint mobility can be restricted or even completely frozen. In third world conditions the surgical approach to severe forms of bony ankylosis consists of a single linear opening osteotomy (trismus release) and the closure of the noma defect with locoregional flaps. Relapse of jaw immobility is common and may be caused by minor bone resection, the lack of adequate postoperative physiotherapy, or even the scarring of the defect coverage.In 4 years the authors have gained increasing experience with folded free flaps for simultaneous closure of outer and inner lining of large noma defects and the maintenance and training of re-established jaw function by the use of a dynamic external distractor fixed between the zygoma and the mandibular body. The authors report the bony reankylosis can be reduced by extended wedge osteotomies of the bony bridge and tip-like shaping of the ascending mandibular ramus. To preclude the reossification of the osteotomy site and fibrous scar formation, a dermofatty or muscular tail of the free flap is interposed into the bone gap. Two cases were treated according to this concept with a free parascapular and a latissimus dorsi flap in combination with simultaneous arthroplasty. During a 6-month follow-up period, no signs of a recurrent reduction of mandibular movement were noted in either case.- - - - - - - - - - ranking = 0.28571428571429keywords = jaw (Clic here for more details about this article) |
8/26. Masseter spasm after succinylcholine administration.We report the case of a 20-year-old woman who developed masseter spasm after receiving succinylcholine for rapid sequence intubation. Sometimes referred to as "jaws of steel," masseter spasm secondary to anesthetic administration may progress to malignant hyperthermia. Although succinylcholine-induced masseter spasm is uncommon, it is important to be prepared to deal with this entity when administering succinylcholine.- - - - - - - - - - ranking = 0.14285714285714keywords = jaw (Clic here for more details about this article) |
9/26. Tiagabine may reduce bruxism and associated temporomandibular joint pain.Tiagabine is an anticonvulsant gamma-aminobutyric acid reuptake inhibitor commonly used as an add-on treatment of refractory partial seizures in persons over 12 years old. Four of the 5 cases reported here indicate that tiagabine might also be remarkably effective in suppressing nocturnal bruxism, trismus, and consequent morning pain in the teeth, masticatory musculature, jaw, and temporomandibular joint areas. Tiagabine has a benign adverse-effect profile, is easily tolerated, and retains effectiveness over time. Bed partners of these patients report that grinding noises have stopped; therefore, the tiagabine effect is probably not simply antinociceptive. The doses used to suppress nocturnal bruxism at bedtime (4-8 mg) are lower than those used to treat seizures.- - - - - - - - - - ranking = 0.14285714285714keywords = jaw (Clic here for more details about this article) |
10/26. osteochondroma in the mandibular condyle that caused facial asymmetry: a case report.osteochondroma is the most common benign tumor of the axial skeleton, though it is rarely found in the oral and maxillofacial regions. Reported is a case of osteochondroma affecting the mandibular condyle of a 22-year-old Japanese woman. The patient visited the hospital with the chief complaint of facial asymmetry. She had pain with clicking on her right temporomandibular joint (TMJ), resulting in trismus and facial asymmetry with a chin deviation to the left side. Her maximum jaw opening was 34 mm, with moderate left TMJ tenderness. There was Class I occlusion without open bite. Panoramic radiography and computed tomography (CT) revealed an enlarged right mandibular condylar head. magnetic resonance imaging (MRI) also showed an enlarged condyle with hyperintense bone marrow on a T2-weighted image. Condylectomy and condyloplasty were performed. Surgical specimen of the lesion revealed osteochondroma of the mandibular condyle head. Two months after the initial surgery, facial asymmetry was surgically corrected by Le Fort I osteotomy and chin reduction. The patient was discharged from the hospital with no subjective complaints. At the time of this report, the patient had been followed up for seven months, and there had been no evidence of recurrence.- - - - - - - - - - ranking = 0.14807703990984keywords = jaw, bite (Clic here for more details about this article) |
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