Photogrammetric analysis of postextraction space closure

Introduction. When planning orthodontic treatment, it is sometimes necessary to apply the extraction of individual teeth, in order to achieve proper occlusion and an acceptable aesthetic appearance. Clinicians give the greatest advantage to elastic chains as a method for post-extraction space closure during treatment with fixed orthodontic appliances. When closing post-extraction spaces, it is necessary to measure them in order to adjust the treatment plan. One of the most acceptable methods is photogrammetry. The aim of this study was to analyze, using a photogrammetric method, the efficacy of post-extraction space closure with elastic chains during orthodontic treatment with fixed orthodontic appliances. Material and Methods. The total sample in study consisted of 38 post-extraction spaces in 19 patients who were indicated for first premolars extraction and use of fixed orthodontic appliances in order to achieve treatment goal. Elastic chains were used to close post-extraction spaces. Post-extraction sites were monitored for 6 months with follow-up examinations every 4 weeks. Mechanisms were activated at controlled examinations, and measurements of the width of post-extraction spaces were performed by photogrammetry and digital caliper. Results. The results showed that average reduction of post-extraction space width was 1.00 mm per month by photogrammetric measurement, while the average values of measurements with a digital caliper were 1.02 mm. The average values were measured in six time intervals and a statistically significant change in average intervals of post-extraction spaces during 6 months was determined. Conclusion. The elastic chain has proven to be a very effective mechanism for closing post-extraction space, and photogrammetry as a simple and precise method for monitoring results of treatment. Since the difference in relation to measurements with a digital caliper is minimal, photogrammetry can be routinely applied in everyday practice.

Locally advanced basal cell carcinoma of the auricle and parotid region: A case report

Skin cancers are the most common malignant tumors in general. The most significant risk factor is exposure to UV radiation. They mainly occur in the head and neck region, and the majority of about 80% are basal cell carcinomas. Surgery is standard treatment of uncomplicated basal cell carcinomas, but a multidisciplinary approach is necessary in advanced cases. The case report refers to a patient with locally advanced recurrent basal cell carcinoma with primary tumor localization in the right auricle and parotid region in 2012 when primary surgery was performed. Due to the local recurrence, amputation of the right auricle and trepanation of the mastoid process was done in November 2018, and after that, radiation therapy of a recurrent tumor in the area of the trepanation cavity was applied. In the course of follow-up so far, there is good local control, without signs of toxicity. The case report points to the importance of a multidisciplinary approach and the role of radiotherapy in the treatment and control of advanced basal cell carcinoma of this region.

Investigation of the radiopacity and cytotoxicity of albodent - novel strontium carbonate incorporated calcium silicate based dental cement

Introduction. Calcium silicate (CS) dental cements have numerous clinical indications in dentistry including pulp capping, root end surgery, perforation repair and apexification/apexogenesis treatment. Materials and methods. Novel CS based dental cement with incorporation of SrCO3 radiopacifier named ALBO-DENT was used as an experimental cement material while Portland cement (Aalborg, Denmark) and ProRoot MTA (Tulsa Dental, USA) were used as controls. The radiopacity evaluation was performed using digital Trophy Radiographic system with an intention to precisely determine the minimum of radiopaque agent needed to confer to ISO radiopacity requirement. Thereafter, biocompatibility of material was tested in in vitro conditions in mouse fibrosarcoma L929 cell culture treated with materials? extracts. Cell morphology was observed using phase-contrast microscopy, while cell viability was measured using crystal violet (CV) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assays. Results. Radiopacity evaluation revealed that 30%wt addition of SrCO3 was necessary to achieve satisfactory radiopacity (3.45 mm Al). Cytotoxicity analysis using CV and MTT assays revealed that pure extracts of ALBO-DENT presented superior biocompatibility when compared to PC and MTA controls while serial dilutions of experimental cements? extracts as well as that of PC and MTA did not influence L929 cell viability. Conclusions. Novel formulation of CS cement - ALBO-DENT presented satisfactory radiopacity and adequate biocompatibility.

Oral health status in 12 and 15-year-old schoolchildren

Introduction. Dental caries is, along with periodontitis, the most frequent oral disease and represents a chronic, progressive, multifactorial process that leads to loss of hard dental tissues. The oral health status analysis and caries risk factors assessment in early childhood and adolescence are necessary for creating strategies in oral health promotion and preventive treatment. The aim of the present study was to evaluate caries prevalence in 12 and 15-year-old schoolchildren in Cukarica, a municipality of Belgrade. Material and method. The retrospective study included 409 schoolchildren of both genders. The oral health status was registered using the Klein-Palmer DMFT system (D - Decayed, M - Missing, F - Filled teeth). The methods of descriptive statistics were performed and p-values lower than 0.05 were considered statistically significant. Results. The younger group included 214 children (52.3%) and the older group 195 (47.7%). Individual caries rate was higher in 15-year-old children (81.02%) comparing to 12-year-old (57%). The mean value of decayed teeth for all participants was 2.43 and of total DMFT was 8.99%. Conclusions. Oral health promotion programs gave positive results. Moreover, it is important to implement them in the underdeveloped regions of Serbia with an improvement of the oral health literacy of parents and raising awareness of oral diseases.

How to prevent fracture of NiTi files

More certain therapeutic and significantly facilitated solution of everyday endodontic problems are provided by the introduction of NiTi rotary files in endodontic practice and their proper application. However, their widespread use has caused more and more frequent fractures and has become a significant frustrating factor that diminishes their numerous benefits. Torsional stress and cyclic fatigue are the main reasons for the occurrence of a fracture, and the frequency of NiTi file fractures is exactly proportional to the degree of bending of the canal, knowledge of the features of the file, ie. the skill and expertise of the therapist. The most dominant factor for the occurrence of fractures is the dentist who, in addition to manual dexterity, must have a good knowledge of the anatomy of various canal systems and file design in order to make the best choice for each individual case. Properly formed access cavity and knowledge of the working part of NiTi files enable maximum realization of endodontic skills, increased efficiency of intervention and reduced possibility of error during canal instrumentation. The special treatment of NiTi alloy and new solutions related to the design of the working part have significantly increased file flexibility and resistance to cyclic fatigue. Specific design (reduced number of threads, change of conicity, interruption of blade continuity), reduced engagement of file, ie. change of dynamics of movement in the canal (full rotation, reciprocal, eccentric, transaxial), as well as reduced number of processing files, have also significantly influenced the reduction of fracture risks. The aim of this paper was to analyze the most common reasons for the fracture of NiTi files and emphasize measures and factors that can increase their safe use and reduce complications during canal instrumentation.

Periradicular tissue necrosis caused by accidentally injected sodium hypochlorite through fausse route in upper maxillary canine

Sodium hypochlorite (NaOCl) is a strong antiseptic agent that is usually used as endodontic irrigant for dissolving organic parts of pulp and dentin and neutralizing toxic products. However, the use of sodium hypochlorite may cause destruction of blood vessels, soft tissues and bone necrosis if extruded into the periapical region. Urgent treatment of the NaOCl accident should be oriented on pain relief, infection control and recovery. This paper shows a case of periradicular tissue necrosis after accidental extrusion on NaOCl through fausse route of right maxillary canine, and complete tissue regeneration after surgical debridement and bone augmentation with addition of platelet rich fibrin (PRF) that occurred in a 53-year old patient at the dental clinic of Faculty of Dentistry in Pancevo.

Evaluation of bond strength of one step and two steps self-etch adhesive agents with two different pulp-capping materials

Primary purpose of restorative dentistry is to preserve pulp vitality. Besides calcium hydroxide, the application of calcium silicate cements as a material for direct pulp capping has become used recently. The aim of our study was to investigate the influence of materials for direct and indirect pulp capping on the bond strength of composite restorations using two different self etch dentin adhesives. The test was performed on 60 intact molars extracted for periodontal or orthodontic reasons. The prepared samples were divided into the two groups and three subgroups depending on the adhesive and pulp cupping material. Two different calcium silicate based materials were used for pulp cupping. One step and two steps self etch dentin adhesive was applied to prepared specimens depending on the group and with the help of a specially made metal mold set up a composite post. The share bond strength was assessed using a universal testing machine. The results showed significant difference in the share bond strength between the samples treated with TheraCal LC and Biodentine with TheraCal LC being superior to Biodentine.

Primary intraosseous leiomyosarcoma of the nasal and paranasal cavities: A case report

Leiomyosarcomas belong to one of the histological subtypes of soft tissue sarcomas. They most often occur in genital, gastrointestinal tract and extremities, and the appearance of these tumors in the bones (especially head and neck) is very rare. Clinically, leiomyosarcomas are aggressive tumors. Treatment is multidisciplinary and includes surgery, radiotherapy, and chemotherapy. This case report presents a 61-year-old patient who was referred to a maxillofacial surgeon due to congestion of the right side of the nose, pain in the right eye, and occasional epistaxis. After complete examination, including biopsy with histopathology and immunohistochemistry, primary intraosseous leiomyosarcoma of the nose and paranasal cavities was diagnosed. Since the tumor lesion was assessed as inoperable, the treatment started with radiotherapy. Two and half years after the radiotherapy was completed, there was good local control of the disease and no dissemination. The case report illustrates the rarity of localization, challenges and difficulties in multimodal treatment, and contribution of radiotherapy to good treatment results.

Dentistry in the eyes of medical students

Introduction. It is known that patients primarily come to general practitioners asking for help with oral disease. Although the matter falls out of the frame of `traditional` medical practice, ethical guidance suggests that doctors should examine one`s oral cavity with the aim of recognizing symptoms which treatment could improve the quality of oral and general health leading to an early discovery of potentially severe diseases. The aim was to examine the habits and attitudes of medical students and graduates who are interns related to oral health care, their knowledge of oral cavity diseases and systematic diseases with symptoms manifested in oral cavity, as well as their knowledge of patients who are at risk from dental interventions. Material and methods. The survey was conducted on the sample of 100 subjects. The questionnaire consisted of 16 questions. The results were collected and statistically analyzed. Results. The majority of subjects go to the dentist only after the toothache starts. Although 84% of medical students make sure to check oral cavity while taking medical history, more than half of the examined medical students would not send the patient to dentist for consultation. Every tenth student was not able to state other local disease of oral cavity apart from tooth decay. Even 6% of examined students classified the tooth decay as an aesthetic problem. Half of examined students considered their study program needed course in the field of dentistry. Conclusion. Medical students are not well informed about the field of oral hygiene and pathology of oral cavity. Interdisciplinary cooperation of General Practitioners and Dentists is important.

Class II Division 1 malocclusion treatment using TADs: Case report

Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.