Cone-beam computed tomography for assessment of dens invaginatus in the Polish population.

Objectives: There are many developmental variations in the permanent dentition. Dens invaginatus can be recognized on many dental X-rays of affected patients, but not every image allows for assessment of the type of malformation. The aim of the present study was to assess the presence of dens invaginatus with radiological features using cone-beam computed tomography (CBCT).

Early postnatal development of the lumbar vertebrae in male Wistar rats: double staining and digital radiological studies.

The aim of the study was to evaluate the physiological developmental changes of male rats' lumbar vertebrae during the first 22 days after birth. Morphology and mineralisation of lumbar vertebrae were evaluated using double-staining and digital radiography system, which allowed vertebral width and optical density to be determined. Pup weight, crown-rump length, body mass index and vertebral width increased during postnatal period and significantly correlated with their age.

Radiographic appearance and clinical implications of the presence of radix entomolaris and radix paramolaris.

Background: The variation in mandibular molars' anatomy is not as rare as it might appear to be. Depending on the location of the additional root found in a mandibular molar, it may be referred to as either radix entomolaris (RE) or radix paramolaris (RP). The aim of the study was to present radiographic appearance of RE and RP and indicate the clinical implications of its presence.

Transmigration of mandibular canine - case report.

Background: Transmigration is a phenomenon of movement of an unerupted tooth in the bone across the midline. This anomaly is not often found. Transmigration is more prevalent in females than in males, and more often encountered in the mandible than maxilla, it affects mostly canines.

Developmental outcome after exposure to cyclooxygenase inhibitors during pregnancy and lactation.

The developmental toxicity of non-selective (ibuprofen, piroxicam, tolmetin) and selective cyclooxygenase-2 inhibitors (DFU) was evaluated in rats. Compounds were administered separately from the eighth gestational to the seventh lactational day. After spontaneous delivery, the weight, length and number of fetuses were determined.

Morphology of root canals in adult premolar teeth.

The aim of the present study was to examine the morphology of root canals in premolar teeth with completely formed root apices. The material consisted of 139 extracted premolar teeth, including 83 first premolars (59.7%) and 56 second premolars (40.

Optimisation of conditions of visualisation of dental crowns in dental radiography.

Digital X-ray imaging systems are an alternative to conventional intraoral radiograms. In the paper there are discussed the possibilities of application of different digital radiography tools as well as density measurements in optimization of diagnostics of pathological lesions of teeth crowns. There were analyzed 1,491 digital intraoral radiograms obtained in 985 patients in the Digora Soredex digital radiography system.

Radiodensitometric measurements in cases of chronic periapical changes of endodontically treated teeth.

The purpose of the paper was radiodensitometric evaluation of hard tissues of roots and alveolar bone of endodontically treated teeth with clinically detected chronic periapical inflammatory changes. The material consisted of 139 digital intraoral radiograms of endodontically treated teeth with chronic periapical changes: 54 teeth with granulomatous inflammation, 62 with fibrous changes and 23 teeth with purulent lesions. There was discussed the value of digital radiography and radiodensitometric measurements in cases of periapical inflammations of endodontically treated teeth.

Odontogenic keratocyst in Gorlin-Goltz syndrome.

Gorlin-Goltz syndrome is an autosomal dominant disorder characterized by exteremly pleomorphic clinical manifestations including multiple odontogenic keratocysts. These cysts constitute only 3% to 11% of all jaw cysts, but are often of great concern to clinicians because of high recurrence rate, aggressive behavior and association with Gorlin-Goltz syndrome as they are found in 75-80% of the affected patients. In the paper there were presented histological, clinical, and radiological features of odontogenic keratocyst in Gorlin-Goltz syndrome.

Demographic structure of patients taking dental X-rays in the Lublin region.

Intraoral radiograms are the most often taken X-ray pictures in humans and the dose of radiation necessary for such radiogram is very low. However, there exists a considerable anxiousness in Polish society towards Roentgen radiation making patients avoid dental X-rays even when these are indispensable in dental treatment. The aim of the study was the evaluation of demographic structure of patients taking intraoral radiograms.

Early detection of potential impaction of permanent maxillary canines caused by resorption disorders of deciduous canines.

Maxillary canine impaction is an often-encountered dental anomaly as after the third molar it is the maxillary canine that is the most frequently impacted tooth. One of many factors causing impaction of maxillary canines is the presence of the persistent primary canine. The aim of the study was early evaluation of resorption of deciduous maxillary canines and an attempt at prediction of impaction or delayed eruption of their permanent counterparts as well as the possibility of their eruption in proper position in the dental arch.

The application of digital radiography and radiodensitometry in evaluation of chronic fibrous periapical changes of endodontically untreated teeth.

Lesions in hard tissues of teeth can be detected on radiograms only when there exists considerable decrease in mineralisation. By means of digital radiography the diagnostics of dental pathologies becomes more precise and objective. The aim of the paper was the radiodensitometric evaluation of chronic fibrous periapical changes.

Imaging diagnostic approach to tumours of ramus and angle of the mandible.

The abundance of up-to-date diagnostic equipment and imaging techniques makes it necessary to reconsider diagnostic approach to many maxillofacial disorders, including mandibular tumours, and to elaborate algorithms of radiological examinations allowing for the planning of a cost-effective treatment based on thorough diagnostics. The material was composed of 146 case records of 68 patients examined in the years 1995-2000 in the Medical University of Lublin. There were selected radiograms as well as the results of other imaging modalities of persons with clinically confirmed tumours of mandibular ramus or angle.

Application of Doppler ultrasonography in congenital vascular lesions of the head and neck.

Objectives: To evaluate the value of Doppler ultrasonography in the assessment of congenital vascular lesions of the maxillofacial region.

Methods: 27 new patients with 36 congenital vascular lesions in the maxillofacial region as well as 10 patients previously treated with cryotherapy underwent ultrasonography (US) with a 6.0-10.

HPLC-OPLC-MS investigation of change of formaldehyde and its generators in human teeth of different physiological stage.

Taking into consideration the unquestionable intracellular occurrence of formaldehyde (HCHO) and its generators in cells of plant, animal and human organisms as well as in body fluids it was resolved to determine their levels in hard tissues of physiologically and pathologically changed teeth. The aim of the work was to determine the relationship between the level of HCHO and the levels of its generators in pathologically changed teeth, mainly carietic teeth as tooth caries is still a serious and commonly occurring problem. The occurrence of HCHO (captured as its dimedone adduct) and some of its potential generators was demonstrated in the hard tissues of healthy and pathological human teeth by means of OPLC, HPLC and MS analyses.

[Iatrogenic foreign bodies within the maxillofacial region].

Five hundred different X-ray pictures of the maxillofacial region were analysed. Foreign bodies such as dental filling materials and instruments were found. It was stated that most often the excess of endodontic material was observed in the region of a treated tooth.

Measurement of formaldehyde as dimedone adduct and potential formaldehyde precursors in hard tissues of human teeth by overpressured layer chromatography.

Simple, automatic overpressured layer chromatographic methods for the parallel determination of endogenous formaldehyde in the form of dimedone adduct and potential formaldehyde generators (betaines) in hard tissues of human teeth are described together with an efficient densitometric evaluation. These simple procedures involve the special preparation of teeth and extraction of formaldehyde, of different binding force in teeth, with methanol containing dimedone, and the isolation of betaines with an aqueous solution of methanol.

Comparative quantitative chromatographic determination of formaldehyde in different groups of physiological and pathological hard tissues of teeth.

Taking into consideration that HCHO level in cells of plant, animal and human tissues as well as in body fluids depends from physiological state of an organism in the current study it was decided to find out if there are changes of HCHO level in different physiological and pathological hard tissues of teeth. The obtained results showed in all 4 groups of teeth separately analysed that there were some regularities in the level of HCHO as far as similar physiological or pathological states are concerned. This was best seen when comparing the obtained results with mean HCHO level of the studied groups of teeth.

The increase of formaldehyde level in some rare pathological cases of teeth determined with the use of quantitative TLC.

In our previous works we proved that formaldehyde (HCHO) level in hard tissues of teeth could depend on their physiological state. In the current paper we presented the results of HCHO determinations in different dental pathologies, mainly the ones rarely encountered in dental practice, e.g.

Quantitative TLC determination of formaldehyde in hard tissues of teeth.

Levels of formaldehyde, which is formed within cells as an indispensable part of biological processes, have been determined by means of TLC in hard tissues of human teeth, with and without pathological changes. A wide variety of formaldehyde levels was determined according to the physiological state of a tooth. The results show that caries can be of immense importance in the process of formaldehyde formation and its release in hard tissues of human teeth.