Hellenika stomatologika chronika. Hellenic stomatological annals最新文献

On permanent premolars of 9 puppies (three groups of 45 days, 3 and 4 months old) the neural plexus was studied, using the Alcian blue/PAS and Bielschowsky staining techniques. Nerve fibres were observed on the 45 days group, directed to the odontoblastic layer, as well as fine nerve bundles, parallel to the vessels. On the 3-months group nerve fibres were seen in the dental papilla and the dental sac. Furthermore a significant increase in number size of the nerve fibres was noticed on the 4-months group, comparing with those of the 3-months group.

The clinical features of the most common bluish and pigmented lesions of the oral mucosa are discussed in this paper. Considerable attention is given to the findings from the medical and dental history of the patient, in the methodology of the clinical examination (inspection, palpation, digital pressure, aspiration) in the clinical characteristics of the lesions (location, size duration, consistency, prognosis) in the laboratory findings (radiographs and other supplementary examinations) and in the differential diagnosis. The bluish and pigmented lesions which are discussed include: melanoma, Albright's syndrome, Addison's diseases, Peutz-Jeghers's syndrome, arsening poisoning, hemangioma, hematoma, petechia and ecchymosis, Sturge-Weber syndrome, amalgam tatoo, heavy metal lines, mucocele and eruption cyst.

Administration of antibiotics is usually recommended when an avulsed tooth is replanted although: a. no immediate acute infection as a consequence of tooth replantation has been known, b. their administration following tooth replantation has been questioned. The purpose of this experimental study was to investigate the effect of antibiotic administration on the healing of replanted teeth. 16 maxillary and mandibular permanent lateral incisors of four dogs aged from 5 to 7 months were immediately replanted without endodontic treatment. Oxytetracycline was administered intramuscularly the day of the experiment and twice daily through the experimental period in two of the dogs (8 teeth). The animals were sacrificed so as to provide observation periods of 15 and 22 days. Results were evaluated histopathologically in haematoxyline eosine stained sections. Results obtained showed shallower resorptine cavities without inflammatory cells in the experimental group (administration of antibiotics) than those found in the control group where inflammatory cells were also present.

The combination of highly concentrated fibronogen, thrombin, clotting factor XIII and fibrinolytic inhibitor aprotinin, represents a new biological, haemostatic and adhesive system as "Fibrinkleber". Its way of action is the same as phase II of coagulation mechanism and its result is due to the formation of a strong and extensive fibrin clot. Because of the presence of aprotinin, that inhibits fibrinolysis, this clot remains for a longer period. A fast haemostasis and a maintenance of tissues in contact is attained and the healing becomes easier and accelerated. In addition, Fibrinkleber is completely resorbable and has very good tissue compatibility, contrary to synthetic adhesives. Regarding experimental results the fibrin adhesive system has been applied in 58 clinical cases with the indications: 1. convocation of fistulas introoral or extraoral 2. as biological band 3. extraoral fixation of skin grafts, used in areas with poor possibility of other kinds of skin fixation 4. in cases with clef lip and cleft palace 5. in combination with bioceramic materials 6. in combination with lyo-dura for reconstruction of orbita-floor fractures. We believe that the fibrinkleber cannot help a bad surgical technique nor replace a well made stitch of a wound. It is however possible to: 1. improve the surgical result (normal epithelization of the open intraoral wounds) 2. to shorten the duration of the surgery (dermatic grafts without any stitching) 3. accelerate the healing phases of a surgical wound 4. allow the modification of surgical techniques, when this is possible (convergence of fistulas etc).

Perforations of the pulp chamber wall and area of root may occur during access opening of the pulp chamber and during root canal instrumentation. The authors in this paper describe in details the factors that can lead to perforations of pulp chamber or area of the root, the treatment and factors that affecting the repair and the prognosis of the perforations.

The main aim of this study is to emphasize the necessity of the bite marks used as evidence for violent incidents, rapes and murders. The first time that bite marks were used officially was in 1977. After a historical review has been made, the kinds of bite marks and the methods they were heated, are described. The authors also deal with two cases of violent incidents with bite marks found on the shoulder, blade and thigh, of one adult man. They also deal with a case of a violent incident with bite marks on the buttock, thigh, left arm and right elbow, of a 18-month old child. The bite marks were caused by the nurse-maid of the child who was trying to make it obedient, because the child disturbed her with its noisy behaviour.

A 73 year-old male with a Kaposi's sarcoma presenting as multiple, red-purple papules and nodules on the vermillion border and as ulcerations on the labial mucosa, is described. No other skin or organ involvements were found. The main clinical and histopathological characteristics of the classic form of Kaposi's sarcoma are briefly discussed and the recent aspects on tumor histogenesis and pathogenesis are analysed.

The health expenditures in developed countries show a remarkable increase over the last two decades representing 7-10% of their G.N.P. In Greece, the public health expenditures amounted to an average of 3.5% of the G.N.P. for the period 1977-1983. The private sector represents a very significant component, amounting to 2.4% of the G.N.P. Dental health expenditures in Greece are considered significantly low. They account 2% of the total health expenditures. For comparison, in other developed countries this percentage is quite higher of the order of 5 to 10%. It follows that there is a great need to increase the dental health expenditures in Greece so that the needs for dental treatment of the population can be met more easily achieved by increasing the emphasis of the dental care in preventive measures starting especially with the younger segment of the population.

This study was conducted to determine the incidence and degree of postobturation pain and to determine whether there is a significant relationship between pain and any clinical factors or conditions existing before, during, or at the completion of the root canal therapy. Of the 239 patients included in the study, 203 (84.9%) had no pain during the first 48 hours, 26 (10.9%) had slight pain, 5 (2.1%) had moderate pain and 5 (2.1%) had severe pain. Thirty days after obturation 3 patients had slight pain, 2 patients moderate pain and only one patient had severe pain. Meanwhile, we had to repeat the root canal therapy in 3 cases. Significant relationships were found between postobturation pain and obturation of the root canal past the apical foramen.

Thorough evaluation of all structures that might contribute support to a prosthesis must certainly include natural teeth, since their number, location in the arch, individual position, mobility, vitality, crown-to-root ratio, root size and shape, susceptability to caries and pathologie involvement. One of the most important observations affecting treatment planning involves the condition of the occlusal plane of the remaining natural teeth. The use of periodontally weakened teeth as abutments is often debated but the prognosis of periodontal therapy and thus the possibility of using periodontally diseased teeth for prosthesis include: 1. The extention of the disease involvement. 2. Duration and progression. 3. Causative factors, including occlusal, bone level, pocket-dept and furcation involvement and 4. Attitude, cooperation and determination to provide home care. The development and the maintenance of bacterial plaque on the teeth is considered as a primary factor that causes inflammation and effects the Biological future of fixed prosthesis.