Publications by authors named "Persin L"

Lymphangiectasia is the benign malformation of lymphatic channels associated with either focal or diffuse dilation of vessels and impaired lymph drainage. This malformation has the potential to create a cystic mass due to the accumulation of lymphatic fluid. While rare in adults, intussusception, the telescoping of the proximal bowel into the distal bowel, can be caused by a mass within the bowel.

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The Aim Of The Study: Was to assess the correlation of various maxillofacial structures in subjects with different types of craniofacial growth.

Materials And Methods: The results of comparing the morphology of the masseter muscles (thickness, area, echostructure) in 30 volunteers aged from 18 to 25 years without malocclusions and different type of craniofacial growth were presented.

Results: A significant correlation between the thickness of the masseter muscles and morphology of the facial skull was observed: the smallest thickness of masseter muscles was in subjects with vertical type of craniofacial growth, the largest - in patients with horizontal type of craniofacial growth.

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A 6-year-old boy with a skeletal Class III malocclusion was treated with the use of the fixed own design orthodontic appliance. The device includes acrylic-splint with a three-sided (Bertoni) screw mounted in them, an arc element in the region of the front teeth for protractive action on them, metal hooks for the face mask. Orthodontic treatment using that appliance allowed to normalize the upper dental arche in the sagittal and transversal directions.

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The paper describes technical and methodological features of electronic registry in orthodontic clinic. The authors elaborated custom made software according to Russian Ministry of Health requirements for medical local nets and databases. The registry allows processing of medical statistics and forming of reports, as well as analyzing medical staff effectiveness and seasonal dynamics of clinical work.

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Non-nutritive sucking behaviors such as finger- and tongue-sucking, tongue thrust, lips- or cheek-sucking, nail-, lip- or tongue-biting and other pressure habits represent risk factors for malocclusion. The association between psycho-neurological disorders and different types of malocclusion in children with sucking habits was long studied. During neurological examination, many children with sucking habits are diagnosed as Minimal Cerebral Dysfunction or Attention Deficit Hyperactivity Disorder (ADHD) bearers.

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Orthodontic treatment of patients with distoclusion combined with dental deep bite and linguo version of the front upper teeth is one of the most difficult forms of malocclusion to treat to a functional and morphological optimum. Our objective was to analyze the efficacy of a fixed anterior bite plane appliance to disclude the teeth and correct this type of malocclusion. At the Department of Orthodontics MSUMD (Moscow State University of Medicine and Dentistry), we proposed the use of a fixed anterior bite plane for the effective treatment of patients with distoclusion combined to a dental deep bite.

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Objective: To evaluate the psychological status and correlate it with the severity of facial deformities of patients with skeletal malocclusions before orthognathic treatment.

Materials And Methods: A total of 96 patients aged 15 to 47 with skeletal malocclusions were examined before orthognathic treatment was provided. A photographic analysis was carried out to determine the severity of facial deformity according to the Facial Aesthetic Index (FA1).

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Angular and linear parameters, characterizing symmetry of occlusional plane position from the left and the right sides with regard to poL-n-poR reference plane, and also relative to PL plane were determined and offered using complex "Head-Dentitions" 3D-model.

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60 children with different types occlusion--normal, distal, mesial and transverse between the ages 7-15 years were selected. Using unique computer software programme and 3D digitizer MicroScribe-G2 (Company Immersion, USA) on the articulator with mounted casts, persuaded measuring the scores in different movements of mandible habitual occlusion, maximum forward movement and maximum lateral movements. Scores were calculated and results interpreted.

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25 subjects aged 19-25 years with Class II malocclusion were assessed using radiographic and functional methods of diagnosis. Individual differences in occlusion plane form and position and dentofacial muscles functioning were established.

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25 subjects aged 19-25 years with normal occlusion were assessed using radiographic and functional methods. Individual differences in occlusion plane form and position and dentofacial muscles functioning were established.

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Thirty patients with sagittal, vertical, and transverse abnormalities of occlusion combined with abnormal position of the frontal teeth and improper shape and size of dentition were examined. The position of maxillary canines was evaluated by the method suggested by L. Garner (1974) determining the relationship between the location of frontal teeth and position of soft facial tissues.

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A new method for evaluation of dentition during occlusion is suggested (2001). Thirty patients with normal occlusion were examined. Dental occlusion was evaluated for the frontal and lateral segments.

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Changes in the functions of maxillofacial muscles were studied in patients with first-class defects of dentition. The mean biopotential of masticatory muscles in patients lacking 1 antagonist pair is 30.4% and in those lacking 4 pairs 59.

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Anthropometric, functional, and long-distance x-ray examinations of 26 subjects with normal occlusion (14 women and 12 men aged 20-27 years) were carried out in order to define the topographic and anatomical criteria for repair of maxillofacial harmony in case of lost occlusive checkpoints. Basic topographic and anatomical criteria of repair of the maxillofacial system in patients with lost occlusion checkpoints (level of position and direction of occlusion surface in the facial skull) were defined on the basis of long-distance roentgenograms of the head in the lateral projection. Individually determined occlusion surface is the key to repair of morphofunctional harmony of the maxillofacial system in patients with abnormalities complicated by decreased height of the lower segment of the face.

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Anthropometric, functional, and teleroentgenographic examinations were carried out in 26 subjects aged 20-27 years with functional occlusion. Correlation of occlusion plane direction (OcP) with respect to the Frankfurt horizontal line (FH) and the dental, gnathic, and soft tissue parameters of the head and maxillofacial muscular functions was studied. The angle formed by the Frankfurt horizontal line and occlusion plate (FH-OcP) depends on the anthropometric angular and linear osseous parameters of the facial skull and soft tissue parameters of the face and with the functional status and coordination activity of maxillofacial muscles antagonists and synergists.

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The present study has been done in the framework of federal programme "Children of Chernobyl" with the aim to determine spread and structure of dental jaw abnormalities in children born and living in the radiation polluted regions after Chernobyl accident in 1986. 183 children have been examined in Donskoi town of Tula Province with the polluted soil by Cs-137 up to 5 Ci/km. All the examined children were divided into 2 groups: group 1--born in 1980-1986 and group 2--born in 1987-1994.

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The electromyogram (EMG) amplitude of the masticatory and temporal muscles is decreased and EMG amplitude of suprasublingual muscles increased during mastication or voluntary occlusion in patients with class I dentition defects in comparison with the controls. The changes were the greater, the more antagonist pairs were missing. The duration of masticatory period and the number of masticatory movements increased.

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The new nasopharyngoscopic functional classification of palatopharyngeal joining is based on the results of examinations of 57 children with congenital uranoschisis after uranoplasty and 19 healthy children aged 5 to 14 years by nasopharyngoendoscopy. The classification defines the causes of palatopharyngeal insufficiency and for the first time takes into consideration the disagreement between the palatopharyngeal lock and articulation. The proposed classification helps select the most effective method of rehabilitation of the above patient population and helps follow up the time course of changes in the function of the palatopharyngeal lock under the effect of treatment.

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Programmed multichannel bioelectrical regulation was used in the treatment of 19 children aged 5 to 14 with osteoarthrosis deformans of the temporomandibular joint. The treatment resulted in amelioration of the joint function in all the patients: opening of the mouth increased by an average of 7.5 mm, the volume and density of the lateral and medial pterygoid muscles increased, and the density of osseous tissue of the joint process decreased.

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The authors propose a device for measuring plaster models of patients' jaws with normal occlusion in order to evaluate the distance from the coordinate point to the point between the incisors (i), points of contact of the canines (p) and of contact of the first molars of the maxilla and mandible (m). It is possible to assess the position of the upper and lower dentition in the skull space in relation to the universal parameter--the coordinate point common for both dentitions and parameters of the skull.

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