International journal of oral and maxillofacial surgery
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Int J Oral Maxillofac Surg · Aug 2007
Case ReportsIsolated hypoglossal nerve palsy due to a vascular anomaly.
The case of a patient with an unusual cause of an isolated hypoglossal nerve palsy is presented. Magnetic resonance (MR) imaging demonstrated marked dilatation and ectasia of the right vertebral artery and basilar artery, thereby causing compression of the brainstem. It is therefore proposed that a dilated vascular loop compression of the nerve rootlets, as they exit the medulla, has caused the hypoglossal nerve palsy. This case demonstrates that excellent images can be obtained from MR imaging, and also emphasises that other pathologies must be considered in the differential diagnosis of hypoglossal nerve palsy.
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Int J Oral Maxillofac Surg · Jul 2007
Effects of orthognathic surgery for class III malocclusion on signs and symptoms of temporomandibular disorders and on pressure pain thresholds of the jaw muscles.
The aim of this longitudinal study was to determine the effects of orthognathic surgery on signs and symptoms of temporomandibular disorders (TMD) and on pressure pain thresholds (PPTs) of the jaw muscles. Fourteen consecutive class III patients undergoing pre-surgical orthodontic treatment were treated by combined Le Fort I osteotomy and bilateral sagittal ramus osteotomy. The clinical examination included the assessment of signs and symptoms of TMD and the assessment of PPTs of the masseter and temporalis muscles. ⋯ None of the patients were diagnosed with myofascial pain of the jaw muscles at the beginning or end of follow up. PPTs of the masseter and temporalis muscles did not change significantly from baseline values throughout the whole study period. The occurrence of signs and symptoms of TMD fluctuates with an unpredictable pattern after orthognathic surgery for class III malocclusions.
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Int J Oral Maxillofac Surg · May 2007
Comparative StudyAssociation between estrogen receptor polymorphism and pain susceptibility in female temporomandibular joint osteoarthritis patients.
The purpose of this study was to investigate the possible association between estrogen receptor alpha (ERalpha) polymorphism and pain susceptibility in female symptomatic temporomandibular joint (TMJ) osteoarthritis (OA) patients. A patient group of 100 women, diagnosed as TMJ OA according to the research diagnostic criteria for temporomandibular disorders, were selected, and 74 women with no signs and symptoms of temporomandibular disorder were assigned to a control group. Pvu II and Xba I restriction fragment length polymorphisms were analyzed by direct haplotyping. ⋯ Frequencies of genotypes and haplotypes in the patient and control groups were compared, and the association between pain intensity and copy numbers of PX haplotype were evaluated using the chi-square test. No significant differences in genotype and haplotype frequencies were observed between the patient and control groups (p>.05). TMJ OA patients carrying the PX haplotype were found to have a significantly higher risk of moderate or severe pain compared to those without the PX haplotype, suggesting that ERalpha polymorphism may be associated with pain susceptibility in female TMJ OA patients.
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Int J Oral Maxillofac Surg · Apr 2007
Case ReportsAspiration of an impacted lower third molar during its surgical removal under local anaesthesia.
In this case of an aspirated impacted lower third molar during its removal under local anaesthesia, the problem was recognized immediately during the surgical procedure. The patient, a 23-year-old male, was subjected to urgent radiological examination. ⋯ Oral surgeons should suspect any tooth that has been avulsed or extracted and not found as having been aspirated. Early diagnosis and management of such incidents is essential.
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Soft-tissue chondroma is an infrequent, benign, cartilaginous tumour that is uncommon in the head and neck region. Single-location chondromas rarely evolve into malignant neoplasms. ⋯ There have been a few reports published of cases of soft-tissue chondroma of the neck and parapharyngeal space. Here is described a new location of this tumour in the masticatory space.