Background: Benign tumors account for 80% of parotid salivary gland tumors, early diagnosis and effective treatment will contribute to reducing complications of surgery. Objective: To evalutate surgical results of benign parotid tumors on facial paralysis and other complications. Research Methodology: including 51 patients with benign parotid salivary gland tumors at Hue University of Medicine and Pharmacy Hospital from June 2019 to October 2021 were operated on and monitored for facial paralysis after 1 week, 1 month, 3 months, and 6 months according to the House-Brackmann facial nerve grading system and noted other complications. Results: Pleomorphic adenoma and Warthin tumors are the two most common types of benign tumors. The rate of facial paralysis at the time points after 1 week, 1 month, 3 months, and 6 months gradually decreased by 56.9%, 35.3%, 19.6%, 0%, respectively. Most temporary facial paralysis grade II (mild) and grade III (moderate) (classification of House - Brackmann). The surgical method was significantly related to facial paralysis (p < 0.05). Other complications such as numbness around the ear, hemorrhage, sialocele, salivary fistula, depression of facial contour, bad scars. Nevertheless, no cases of tumor recurrence and Frey’s syndrome were recorded after 6 months. Conclusion: Surgery is an effective and safe treatment for benign parotid salivary gland tumors. Facial paralysis accounts for a high incidence after surgery, but it will fully recover after 6 months. Choosing the appropriate treatment method helps to minimize complications and recurrence after surgery of parotid salivary gland tumors. Key words: benign parotid tumors, facial paralysis, parotidectomy.

Background: Salivary gland tumors are the most complex and diverse of any organ in the body. Assessing the pathological characteristics of salivary gland tumor, contributing to early diagnosis and effective treatment as well as avoiding tumor-induced complications is the focus of the study. Objective: To study clinical, paraclinical features and to evaluate the results of salivary gland tumor surgery. Materials and Methods: 41 patients with salivary gland tumor who were examined at Hue University of Medicine and Pharmacy from Jun 2019 to Jun 2020 were recorded about clinical, paraclinical and evaluated results 1 week, 1 month and 3 months after surgery. Results: Male cases were in the majority (58.5%), the mean age of patients was 52.4±12.4. Majority of the parotid gland tumor size in CT scanner encountered were between 2 and 4 cm (67.7%). Benign parotid tumors often had isodense 61.3%, clear boundaries and non - invasive surrounding. Pleomorphic adenoma was found the most often among the benign tumors at a ratio of 24.4%, followed by Warthin tumors (34.1%), with other types of benign tumors remaining. After parotid surgery, the most common complication was numbness around the earlope (77.4%), facial paralysis (41.9%), hemorrhage (29.1%), seroma (3.2%) and salivary fistula (3.2%). And after submandibular surgery, the most common complication was numbness around the wound (50%), hemorrhage (10%) and hypoglossal nerve damage was very rarely. Conclusion: FNA - Fine Needle Aspiration, Ultrasound and CT scanner were very valuable for diagnosis. Surgery was the main treatment method for salivary gland tumors. Key words: Parotid gland, parotidectomy, facial paralysis

Background: Dental caries is one of the most common and difficult to control chronic infections in children, characterized by its early onset and rapid progression. The objective of the study was to investigate the current status of primary caries and determine the factors related to dental caries in children aged 3-5 years in Hue city in 2020. Subjects and methods: A cross-sectional descriptive study of 464 children and their direct caregivers in 4 kindergartens of Hue city from June 2020 to October 2020. Clinical examination of the children’s oral health and interview with parent/caregiver using to a set of questions to identify related factors. Results: Overall caries prevalence was 77.2%. The index of dmft was 8.82, in which the average index of tooth decay, missing, filling teeth is 8.25, 0.09, 0.48 respectively. The factors related to primary caries were significant through multivariate analysis: Age group, Number of times brushing teeth, Parents help brush teeth and Habit of eating sweets. Conclusion: The prevalence of dental caries in preschool children in Hue city is still very high. It is necessary to have appropriate dental caries prevention interventions, contributing to reducing the rate of caries as in recent decision of the Vietnamese Ministry of Health on universal dental care until 2030. Key words: primary caries, preschool children, related factors.

Background: The extraction of the mandibular third molar is a common oral surgical procedure. Postoperative complications after third molar surgery such as swelling, pain, and trismus have a considerable influence on the quality of life in patients. Methods to alleviate these complications have been the focus of a lot of studies. Aim: To evaluate the surgical wound and postoperative complications after third molar surgery by comparing two different flaps: triangle flap and comma-shaped flap. Materials and Methods: a clinical trial with a split-mouth design. Thirty healthy patients were subjected to surgical extraction of both impacted mandibular third molars, located in a similar clinical and radiographic position. Two different flaps are used: triangle flap and comma-shaped flap. Result: The parameters of pain, swelling, and trismus in the comma-shaped flap group were greater than in the triangle flap group on postoperative days 1 and 2, with a statistically significant difference (p<0.05). On day 7, no significant interference was found between the 2 groups for all parameters of pain, swelling, and trismus (p>0.05). Conclusion: The comma-shaped flap is better than the triangle flap concerning postoperative pain, swelling, and trismus. Key words: Lower third molar surgery, split-mouth design, comma-shaped flap, triangle flap

Background: The prevalence of oral disease and the severity increases with greater age. Its presence can have a major impact on quality of life of the elderly. The objective of the study was to investigate the current status of oral diseases and determine the factors related to oral diseases in elderly in 7 communes in region B Dai Loc, Quang Nam in 2020. Subjects and methods: A cross-sectional descriptive study of 560 people aged 60 and older from April 2020 to December 2020. Clinical examination of the oral cavity and interview with the elderly using to a set of questions to identify related factors: age group, economic condition, educational level, oral hygiene and periodical examination. Results: overall prevalence of oral disease was 92%. In which, the SMT index was 4.38. Gingivitis accounted for 46.3%, tartar 63.4%, plaque was present in 203 people (36.3%). Regarding the CPITN: CPI 0 was 40.0%, CPI 2 was 44.3%, CPI 3 was 2.9% and CPI 4 was 1.1%. The factors related to oral disease were: high age group, educational level, economic conditions, oral hygiene habits and periodic dental examination. Conclusion: The prevalence of oral disease among the elderly in region B Dai Loc Quang Nam is still very high. It is necessary to strengthen and expand the means of communication, education as well as providing care and treatment services for oral diseases to improve the health and well-being of the elderly. Key words: Oral disease, elderly, related factors.