The complete anatomy of the lingual nerve: A meta-analysis with implications for oral and maxillofacial surgery.

Lingual nerve (LN) injury during surgical procedures in the third molar region warrants a detailed study of its common pathway and important variations. Therefore, the objective of this study was to analyze and compile the multiple anatomical variations of the LN for use in oral and maxillofacial surgery. It is anticipated that the results of the present meta-analysis may help to minimize the possible complications when performing procedures associated with this anatomical entity. Major online databases such as PubMed, Web of Science, Scopus, Embase were used to gather all relevant studies regarding the LN anatomy. The results were established based on a total of 1665 LNs. The pooled prevalence of the LN being located below the lingual/ alveolar crest was found to be 77.87% (95% CI: 0.00%-100.00%). The LN was located above the lingual/ alveolar crest in 8.21% (95% CI: 4.63%-12.89%) of examined nerves. The most common shape of the LN was established to be round with a prevalence of 40.96% (95% CI: 23.96%-59.06%), followed by oval at 37.98% (95% CI: 23.98%-53.02%) and flat at 25.16% (95% CI: 12.85%-39.77%). In conclusion, we believe that this is the most accurate and up-to-date study regarding the anatomy of the LN. The LN was found to be located below the lingual/alveolar crest in 77.87% of the cases. Furthermore, the LN was found to enter the tongue under the submandibular duct in 68.39% of the cases. Knowledge about the anatomy of the LN is crucial for numerous oral and maxillofacial procedures such as during the extraction of the third molar.

Rural-urban differences in children's musculosceletal injuries in north-eastern Poland

OBJECTIVE: To investigate rural-urban differences in severity of injuries, by means of age, sex and duration of hospitalization of injured children in northeastern Poland. METHODS: The study included children admitted to the Department of Pediatric Orthopaedics and Traumatology in between 2002-2005 (1322 patients) and 2012-2013 (1725 patients) due to injury. We applied the rural-urban division on the base of number of inhabitants (rural ­ below, urban ­ over 25000). We divided injuries into four categories based on severity. Statistical analysis was performed to compare the risk of hospitalization due to different types of injuries among children in different age and sex groups, living in rural and urban areas RESULTS: Children from urban areas have a higher risk of hospitalization compared to their peers living in rural areas due to two least severe categories of injuries. Children from rural areas had much higher risk of hospitalization due to most severe injuries. Results were consistent for both time intervals.. The average duration of hospitalization was significantly longer among rural populations. However, in both rural and urban areas the mean length of stay has been shortened in comparison with the years 2002-2005. The average age of urban patients has been reduced over the years and remained stable among rural population. In both groups boys comprised the majority of patients with all kinds of injuries. CONCLUSIONS: Analysis of the risk of hospitalization among children from rural and urban areas brings constructive conclusions only after applying the division based on severity of injuries. Children living in rural areas and small towns are at a higher risk of suffering severe injuries that pose a risk of permanent disability, and of longer hospitalization because of them, compared to children living in larger cities.