LIMA, Peru: U nedavno objavljenom istraživanju naučnici su radili na razvoju integrisanog programa za redukciju pojave karijesa i smanjenje težih oblika juvenilnog karijesa kod male dece. Ovaj program je obuhvatio srednje medicinsko osoblje i stomatologe koji su prošli obuku pre početka kliničkog istraživanja. Rezultati ovog istraživanja pokazuju značajno smanjenje pojave karijesa uz dobru saradnju zdravstvenih radnika, što je ujedno i poziv stomatolozima i zdravstvenim radnicima da tome posvete pažnju.
LOS ANĐELES, USA/SIČUAN, Kina: Iako su genetska istraživanja u poslednje vreme vrlo relevantna na polju medicine i biologije, ona se relativno malo koriste u stomatologiji. U ovom istraživanju, koje predstavlja korak napred u tom smislu, naučnici su dokazali da epigenetska regulacija, koja se bavi promanama u organizmu uzrokovanim modifikacijama u genskoj ekspresiji, može da konntroliše oblikovanje i razvoj korena zuba, što bi potencijalno moglo da se primeni jednog dana za regeneraciju zuba.
The objective was to analyze bone resorption patterns in posterior mandibles and the dimensions of their corresponding digital bone grafts. This could allow the fabrication of bone grafts with standardized dimensions that can be applied in the majority of clinical cases. Cone beam computed tomography scans (n = 120) were analyzed to evaluate the frequency of Cawood and Howell (C&H) classes. The most frequent class needing bone augmentation was virtually regenerated using specific software. Dimensions of the grafts were calculated. Class V was the most frequent atrophic class needing augmentation in posterior mandibles (20.4%). Severe atrophic stages were more frequent in females (adjusted P value = 0.001), in older people (adjusted P value = 0.31) and in the right mandible (adjusted P value = 0.03). After virtual regeneration of Class V cases (n = 36), 3 clusters based on the number of missing teeth were evident. The mean length of the grafts was 20 mm when 2 teeth were missing (reference), 23.9 mm in the case of 3 missing teeth (P < 0.001) and 29.6 mm for 4 missing teeth (P < 0.001). Height and width were comparable across the 3 clusters (P-values = 0.39–0.93). The mean graft volume was 1,469 mm3 in the case of 2 missing teeth (reference), 1,814 mm3 for 3 missing teeth (P = 0.001) and 2,177 mm3 for 4 missing teeth (P < 0.001). These volumes corresponded to those of soft-tissue expanders, suggesting the possibility of a 2-step augmentation protocol: soft-tissue expansion, followed by regeneration with prefabricated grafts of the corresponding volume. Class V was the most frequent resorption pattern requiring augmentation in posterior mandibles. Virtual regeneration revealed 3 clusters of grafts, differing only in length based on the number of missing teeth. A 2-step augmentation protocol is proposed using soft-tissue expanders and prefabricated grafts with corresponding volumes. This protocol might be more applicable in the right mandible, females and older patients.
KeywordsMandible; alveolar bone grafting; bone graft; cone beam computed tomography; soft-tissue expansion.
The main objective of this study was to evaluate the prevalence of white, red and pigmented lesions of the oral cavity among patients attending the dental faculty of the University of Santiago de Compostela, Spain. We designed an epidemiological, cross-sectional, descriptive and observational study. White, red and pigmented lesions were evaluated randomly in a total of 100 patients. Data such as patient’s demographics, smoking habit, presence or absence of oral lesions (and their features) and whether the patient was aware of the presence of the lesion were collected. Descriptive statistics were calculated, and contingency tables were constructed using the chi-squared test. Analytical statistics were performed by comparing means in nonparametric analyses using the Mann–Whitney U test. The total prevalence of oral lesions was 22% (n = 100). The average age of the patients was 54.68 years (SD = 14.64). Most patients with oral lesions were women (60%) and the average size of the lesions was 1.83 cm. Most of the lesions were red (almost 60%) and asymptomatic (> 90%). There was a known causal link for almost all lesions, with a percentage of higher than 80%. Most patients (69.2%) were aware of the presence of the lesion when it was red (P = 0.016). The most frequent type of lesion in this study population was a red lesion, located on the lip, with a hypertrophic surface, asymptomatic and with a known causal nexus. Periodical check-ups are fundamental to be able to make an early diagnosis of any lesions, as no patient with a white lesion was aware of the risk of it being a premalignant or malignant lesion.
KeywordsOral mucosa; lesion prevalence; Spanish population.