Similarity Analysis for Medical Images Using Color and Texture Histogramss.

Medical databases usually contain a significant volume of images, therefore search engines based on low-level features frequently used to retrieve similar images are necessary for a fast operation. Color, texture, and shape are the most common features used to characterize an image, however extracting the proper features for image retrievals in a similar manner with the human cognition remains a constant challenge. These algorithms work by sorting the images based on a similarity index that defines how different two or more images are, and histograms are one of the most employed methods for image comparison. In this paper, we have extended the concept of image database to the set of frames acquired following wireless capsule endoscopy (from a unique patient). Then, we have used color and texture histograms to identify very similar images (considered duplicates) and removed one of them for each pair of two successive frames. The volume reduction represented an average of 20% from the initial data set, only by removing frames with very similar informational content.

Oral Mucosa Changes Associated with Wearing Removable Acrylic Dentures.

The main purpose of the study was to highlight the incidence of various changes in the oral mucosa associated with wearing removable acrylic dentures. Materials and method. The study was performed on a total of 45 subjects who presented at the Prosthodontics Clinic and the Oral Rehabilitation Clinic of Craiova Faculty of Dental Medicine during January 2018-May 2020. Results. Of the 45 subjects that were wearing at least one acrylic denture 31,11% presented oral mucosa changes or lesions. The most common mucosal lesion was type 1 according to Newton's classification.

Root fractures: epidemiological, clinical and radiographic aspects.

Chronic root fractures are a relative frequent dental condition, occurring both in vital teeth and in teeth with root canal treatment, with a difficult and frustrating diagnosis. Two clinical forms are described: crown-root fractures with crown origin and vertical root fractures with root origin. The aim of the study was to determine the prevalence of the root fractured extracted teeth in two dental clinics with different profile [oral rehabilitation (OR) and endodontics (E)] and to present some particular aspects of the root fractures. A retrospective study over a period of five years was performed to determine the number of extracted teeth and the motives for extraction. For root fractured extracted teeth were noted: fracture type, tooth vitality, restoration type. Although the number of the patients with tooth extractions in the five years period was significantly higher in OR clinic than in E clinic, the number of tooth extractions was almost similar. Most of the teeth (70.6%) were extracted for caries complications. The prevalence of the root fractured extracted teeth was 17.93%. In OR clinic, women had more root fractured extracted teeth compared with E clinic, where the number of root fractured extracted teeth was higher in men. Most extracted teeth for root fracture were teeth with prosthetic restorations followed by teeth with root canal treatment and dental fillings. The most extracted teeth for root fracture were maxillary premolars, almost similar for both sexes, followed by mandibular molars. The teeth with least extractions for root fractures were mandibular incisors and mandibular canine.

Morphological and clinical characteristics of the torus palatinus and torus mandibularis in a sample of young and adults' Romanian people.

The oral exostoses are protuberance located on the alveolar surfaces of the jawbones with nodular, flat or pedunculated shape. The purpose of this study was to highlight the variability of the morphological and clinical characteristics of torus palatinus (TP) and torus mandibularis (TM) in a sample of young and adults' Romanian people. The study was conducted on 74 participants examined in Dental Prosthetics Clinic of the Faculty of Dentistry, University of Medicine and Pharmacy of Craiova, Romania, during October-December 2014. The morphological characteristics of the tori were non-metrical evaluated by the standard procedures of the clinical examination. Descriptive statistics only including means, averages and percentage incidence have been used to describe the results. Of the 74 study participants, 31 (41.89%) were males and 43 (55.40%) were females. Six had only TP, seven had only TM and three participants had both TP and TM. The most of the palatal tori had spindle shaped, located in all area of the hard palate The round mandibular tori with big size were located in the area of both premolars, and those with elongate shape were located in the canine-premolars area. The palatal tori were more frequently in women and the frequency of mandibular tori was equally in men and women. Most of the palatal tori had spindle shape and most of the mandibular tori were solitary bilateral.

VEGF, CD105 and α-SMA immunoexpression study in lips squamous cell carcinomas and associated dysplastic lesions.

This study analyzes the microvascular density (MVD) for CD105+ and α-SMA+ vessels and VEGF immunoexpression for 35 oral squamous cell carcinomas and for the associated dysplastic lesions of the lips. CD105+ MVD was superior in the advancing edge compared to the intratumoral area, no matter the analyzed clinico-pathological parameters (gender, age, differentiation degree, tumor stage) (p<0.05), MVD being significantly higher in poorly differentiated carcinomas (p<0.05). α-SMA+ MVD was also superior in the advancing edge compared to the intratumoral area (p<0.05), MVD values being significantly higher in well and moderately differentiated carcinomas (p<0.05). CD105+ MVD and α-SMA+ MVD were significantly lower compared to the analyzed tumor area (p<0.05), in the dysplastic lesions. VEGF score showed significantly higher values in well to moderately differentiated carcinoma and in the tumor area versus dysplastic associated lesions (p<0.05). CD105+ MVD and VEGF are markers able to characterize the angiogenic phenotype of carcinomas and of the dysplastic lesions of the lips, while α-SMA+ MVD quantification is useful in assessing the vascular maturity degree.