Stomatologija最新文献

Aim: To increase the reliability, quality, and incidence of favorable outcomes during mandibular direct implant prosthetic treatment using the Trefoil system.

Materials and methods: This study included 48 patients (age: 63-85 years). Visualization assessment (CBCT) was performed using Planmeca Promax 3D Mid, and bone density was examined using dual energy X-ray absorptiometry (densitometry, DXA). The final sample consisted of 16 patients deemed suitable for immediate implant placement and loading of permanent prosthesis on the mandible. The distal implants were stabilized using a customized structure made of Titanium Ti6-Al4-V using DMLM 3D printing technology with Concept Laser machines. Modeling of the contours of the jawbone at the planned surgical site was carried out using cone-beam computed tomography and the Mimics Medical 21 software (Materialize, Germany) for each patient. A total of 32 such devices were created.

Results: Of these, 18 were used as the initial implant stability was less than 35 N/cm of torque in a few cases only. The implant survival rate was 100% after 18 months. This method of mandibular implant prosthetic treatment using a customized device for implant stabilization has been patented.

Conclusion: Splinting of the compact walls of the mandible using a customized structure optimized stabilization of the Trefoil prosthetic construction on porous bone (type IV) following extraction of teeth and placement of implants. Clinical testing of the reported method confirmed its viability for dental rehabilitation of elderly patients and proved its ability to provide a good quality of life by creating stable implant prostheses with high functionality.

We refer a case report of a canalicular adenoma of minor salivary gland, located at the submucosal region of the upper lip. The patients' clinical state was thoroughly studied, along with the histopathological findings. The surgical excision was the treatment of choice. Numerous histogenesis theories and the appropriate tumor treatment are mentioned, being always in accordance with the relative literature. Canalicular adenoma of minor salivary gland is a rare oral mucosa lesion. The differential diagnosis among many oral swellings is interesting. The surgical excision is the treatment of choice. The histological examination confirms the clinical diagnosis.

Background: Specific occlusion problems are caused by playing with wind and string musical instruments for a long time. The aim of the work was to establish the orthodontic problems among piano, string and wind instrument players.

Methods: The sample of the research included 167 students of musical education institutions in Lithuania. Participants were divided into three groups: 52 string (violin and viola) students, 46 wind students and 69 piano students as a control group. They were investigated clinically according to the ICON index. The facial profile was estimated and a questionnaire was given.

Results: More than half of the participants had a convex facial profile, 37.7% - straight and only 4.2% - concave. In total 35.3% of participants and even 61.5% of string students had a crossbite. 1/3-2/3 overlap of the incisors was more frequent in wind instrument players group than in other groups. The average of all participants' ICON index reached 28.79±15.01 scores: higher values were estimated for violinists and males. Students with crossbite played more hours than without crossbite. A cusp-to-cusp molar relationship (4034.7 hours) was observed in players who played more hours.

Conclusions: Playing the violin might predispose crossbite and playing wind instruments - deep bite.

Objective: To determine prevalence of pulp stones in molars of patients at the Institute of Dentistry Faculty of Medicine Vilnius University and to evaluate the association of pulp stones and gender, patient age, tooth condition.

Material and methods: Intraoral radiographs were reviewed using the Romexis program and pulp stones were assessed in molars.  Teeth were distributed into intact and non-intact. Information about patients' gender and age was collected. Data were processed using SPSS IBM (Statistical Package for the Social Sciences 22.0) program. Pearson's Chi-square test (χ²) was used. Results were considered to be statistically significant when the significance level of p<0.05.

Results: A total of 531 patients' bitewing and periapical radiographs of molars were evaluated. 2361 molars in total were assessed. Prevalence of pulp stones was 58.8% when pulp stones were found in at least one molar. Pulp stones were detected in 832 molars (35.24%). Patients from 18 to 93 years old were assessed. The highest pulp stones' occurrence was found in the age group from 38 years and older (71.07%). Non-intact maxillary right first molars and maxillary right and left second molars demonstrated a statistically significantly more frequent occurrence of pulp stones than intact molars (p<0.05).

Conclusion: More than half of the participants had pulp stones in molars. Higher prevalence of pulp stones was associated with older age and decayed/filled teeth. There was no statistically significant difference between genders with regards to prevalence of pulp stones.

Objective: Ionizing radiation is hazardous to living tissues due to their effects on somatic cells and genetic material. Since dental radiography is used widely for diagnosis, treatment planning and patient education, it is important for dentists to understand the problems associated with the use of radiation and the methods of preventing them. The present study was designed to assess and compare the knowledge, attitude and practice of dental house surgeons and undergraduate students towards radiation safety and protection.

Materials and methods: A cross sectional questionnaire based survey was conducted among 153 dental house surgeons and undergraduate students attending a dental teaching hospital.

Results: On comparison of the house surgeons with undergraduate students, the present study found that the knowledge, attitude and practice of house surgeons were better than the undergraduate students regarding AERB guidelines, ALARA principles, position distance rule, personal monitoring devices, thickness of lead barrier and use of lead protection. Both the groups had similar high knowledge regarding the harmful effects of X-rays. However undergraduate students had better knowledge regarding radiation hazard symbol and made better use of personal monitoring devices. A greater number of house surgeons were found to have had formal training in radiation protection while undergraduate students were more willing to undergo further training.

Conclusion: Dental students must be educated regarding radiation safety and protection before they commense work as independent practitioners for the protection of their patients, the environment and themselves.

Wilson's Disease (WD) is a rare autosomal recessive hereditary disease with copper accumulation in the body, particularly the liver, brain and cornea. WD is widely treated with chelation agents who enable the copper excretion. Since high concentrations of copper are toxic, WD is associated with hepatocellular carcinoma and cholangiocarcinoma, with low incidence of other types of cancer. We present a case of a 33 year old man who was treated in the Oral and Maxillofacial Surgery Department of the Aristotle University of Thessaloniki with multiple dysplasia lesions and an in situ carcinoma of the tongue, which is to our knowledge the first case report of oral lesions to a patient with WD. Literature is reviewed on copper levels on patients with head and neck cancer, and on chelation agents and their effect on cancer cells.

Background: Salivary gland neoplasms are rare, accounting for 3% to 5% of all head and neck tumors, and involvement of the minor salivary glands is uncommon. Pleomorphic adenoma (PA) is the most common benign neoplasm, which mainly affects the parotid gland. However, involvement of the cheek mucosa is very rare.

Objective: This study reports a case of PA in the cheek mucosa. In addition, the etiopathogenesis, clinical and morphological features and differential diagnoses of PA are discussed, emphasizing the importance of knowledge about the characteristics of this tumor for a correct diagnosis.

Case report: A 50-year-old woman presented with a nodular lesion of endophytic growth in the left cheek mucosa. The lesion was small and well-delimited and had a normal mucosa color and intact surface. An excisional biopsy of the lesion was performed, and the diagnosis was PA.

Conclusion: Although the occurrence of PA in the minor salivary glands of the cheek mucosa is uncommon, the early establishment of a correct diagnosis and initiation of appropriate treatment are important because they permit effective management of the condition and improvement in the prognosis of patients.

Introduction: A significant loss of dental structures during endodontic treatment increases the probability of tooth cracks, fractures or even tooth loss. The objective of this systematic review was to assess the influence of temporary filling material on dental cracks and fractures during endodontic treatment.

Materials and methods: The literature was digitally searched for in vivo and in vitro studies using Pubmed, ScienceDirect and Wiley Online Library databases. A total of 38 potentially relevant records were identified in the literature search after duplicates were removed. After screening, full-text analysis of selected studies was done. Two reviewers independently selected the studies, extracted the data which was structured and summarized.

Results: Five publications met the selection criteria. Ten temporary filling materials were evaluated in this review. The analysis demonstrated that non-eugenol chemically hardening temporary filling materials significantly increase filling and dental fractures and have the lowest fracture and tooth fracture resistance. Glass ionomer cements (GIC) presented the higher hermetic, tightness and fracture resistance features.

Conclusions: A temporary filling material during endodontic treatment may influence dental cracks and fractures. Highest impact for dental cracks and fractures has ready-to-use, eugenol-free temporary filling materials, whereas the least impact has GIC.

Objective: To describe family nurses self-reported oral hygiene practices and to compare them with those of their potential patients in a public, free, and universal primary healthcare system.

Material and methods: Cross-sectional study using an anonymous questionnaire applied to randomly selected participants and their family nurses.

Results: A total of 1,394 people entered the study (1,326 laypersons, 66 nurses). Not all nurses reported to brush their teeth daily. Daily interdental cleaning scored percentages lower than mouthwashes. Devices like oral irrigators or tongue scrappers were not used by family nurses.

Conclusions: Nurses' oral self-care routines are similar to those of university graduates, with poor reported interdental cleaning. Oral health promotion activities may contribute to nurse's oral health and could have a positive effect on their patients.

Aim of the work: If we figure out mandible asymmetry etiology, we can inspire further scientific research, create more effective treatment schemas and recommend means of prophylaxis that could stop mandible asymmetry development. The aim of this work was to analyze monozygotic and dizygotic twins' mandibular asymmetry in sagittal direction using cephalometric data and to analyze its dependence of genetic and environmental factors.

Material and methods: Study sample consisted of 80 dizygotic (DZ) and 80 monozygotic (MZ) twins of same sex. 3 cephalometric measurements were made to determine mandible asymmetry in sagittal direction. Indexes of mandibular asymmetry (IMA1, IMA2) were calculated. Data analysis was done using Microsoft Excel (2013). Genetic and environmental factors influencing mandible asymmetry was determined.

Results: Mandibular dental asymmetry was bigger in monozygotic twins' group but the results were not statistically significant. Mandibular skeletal asymmetry was significantly bigger in dizygotic twins' group: IMA1(DZ)=3.05±1.94, IMA1(MZ)=1.92±1.05, p=0.005. IMA2(DZ)=3.12±2.04, IMA2(MZ)=1.88±1.04, p=0.004. Distance between distal borders of the ramus is mostly determined by genetic factors.

Conclusions: 1. Mandibular skeletal asymmetry was significantly bigger in dizygotic twins' group. Mandibular dental asymmetry and symmetry did not differ in groups significantly. 2. Skeletal mandible's asymmetry is more determined by genetics than environmental factors, but lower molars' sagittal position is determined more by environment.