Topographical relationship between positions of lingual foramina and attachment of mylohyoid muscle in mental region.

PURPOSE: Lingual foramina can be observed between the lingual aspects of the mandible in humans. A sublingual artery is thought to exist in sublingual space and a submental artery in submaxillary space, which pierce the mandible through lingual foramina. During surgery for oral implant placement between apices of the mental foramen, it is important to determine the existence and positioning of lingual foramina. The purpose of this study was to investigate the positions of lingual foramina in relation to the mylohyoid muscle and vertical position of the mylohyoid line using cone-beam computed tomography (CBCT) images. METHODS: We examined 20 formalin-perfused cadavers. The mylohyoid muscle was dissected and marked with a silicone tube, then CBCT images were obtained to evaluate the relationship of that muscle with lingual foramina. RESULTS: We observed 37 lingual foramina in the 20 cadavers. As for vertical positioning, 16 lingual foramina were found in sublingual space, while in horizontal positioning, 6 were found in the anterior region of sublingual space. The ratio of vertical distance from the inferior margin to the mylohyoid line and mental spine was lower in the anterior region as compared to the posterior region. CONCLUSION: In this study, lingual foramina were found to commonly exist in sublingual space above the mylohyoid muscle and pierce the mesial side. For evaluation of the vertical position of the mylohyoid line, it is better to use the stable mental spine rather than the alveolar process.

Management of Ludwig's Angina at a Tertiary Care Hospital in Western Region of India.

Introduction Ludwig's angina is cellulitis of submandibular space, submental space, and sublingual space. The main causative factors include dental infections (dental caries with atypical periodontitis, pericoronitis, and dental procedures). Other predisposing conditions include poor dental hygiene, dental caries, malnutrition, diabetes mellitus, AIDS, and various other immunocompromised states. It presents as an acute onset and spreads very rapidly causing bilateral diffuse neck swelling, edema of floor of mouth, pain, fever, trismus, foul-smelling pus discharge, difficulty in swallowing, airway edema, and tongue displacement creating a compromised airway with stridor. So it requires early diagnosis and aggressive management. Material and methods Clinical data of all patients with clinical diagnosis of Ludwig's angina managed at the Department of Otorhinolaryngology-Head and Neck Surgery, Sir Takhatsinhji (T) General Hospital and Government Medical College, Bhavnagar, India, from 2015 to 2019 were analyzed retrospectively in this study. Result Over the review period, 30 cases were diagnosed as Ludwig's angina, out of which 12 (40%) were males and 18 (60%) were females; male to female ratio was 1:1.5. The age of the patients ranged from six months to 64 years, with a mean age of 38.86 years. Fever, neck swelling, and neck pain were present in all patients. In 16 patients, incision and drainage were done under general anesthesia while the rest five patients required only local anesthesia. In six patients (20%), for maintenance of airway, tracheostomy was required. The most common complication was necrotizing fasciitis and death followed by septicemia. Mortality was observed in three patients (10%) in this study. Conclusion Despite improved outcomes compare to pre-antibiotic era, Ludwig's angina still remains a potentially life-threatening disease in ENT at present. Dental caries, uncontrolled diabetes mellitus, and malnutrition are commonly associated conditions. With early diagnosis, close airway observation, aggressive intravenous antibiotic treatment, and timely surgical intervention, morbidity, and mortality can be reduced.