Swiss dental journal最新文献

Anterior tooth trauma with crown-root fractures represent a major challenge in the dental practice. In order to be able to treat deeply fractured teeth, a sufficient amount of coronal tooth structure is required. In this article, we would like to present two options for tooth extrusion.

When taking intraoral X-rays with a round collimator, the salivary glands and the thyroid gland are exposed to ionizing radiation. The rectangular collimator reduces the patient's radiation dose. This study aims to analyze the impact of the rectangular collimator on the quality of intraoral X-rays taken by students of the University Clinics of Dental Medicine (Geneva, Switzerland). Intraoral X-rays, performed by 8 students with digital intraoral phosphor plates, were collected and a quality score was assigned to each X-ray. A total of 130 intraoral radiographs were analyzed. Half of the radiographs were taken with a rectangular collimator and 24.6% (32/130) were bitewings. The mean quality score of bitewings taken with or without a collimator was 11 ± 1.8 and 10.3 ± 0.9, respectively. The mean quality score of apical X-rays taken with or without collimator was 11.6 ± 1.0 and 11.5 ± 2.1, respectively. X-rays taken with a rectangular collimator were of excellent or sufficient diagnostic quality for 95% of the bitewings and 100% of the periapical radiographs. This quality control study showing that students perform quality intraoral X-rays with a rectangular collimator could encourage clinicians to use this device as ameans of radiation protection in their daily practice.

Lifting heavy weights almost automatically elicits teeth clenching, which, if performed regularly, may lead to chronic trauma. This study assessed self-reported injuries to oral tissues in athletes and bodybuilders caused by resistance training and determined the association between self-reported trauma, performance level and the duration of practicing resistance training. A standardized questionnaire was used to gather information about the respondents (age and gender), their performance level (hobby versus competition athlete), experience with oral tissue trauma, the use of mouthguards, and dietary habits. From a total of 363 females and 239 males, 221 (36.7%) classified themselves as competition athletes and 381 (63.3%) as hobby athletes. Nearly 34.6% (n = 202) of the participants declared distress in their orofacial region during practice. Female hobby athletes reported 2.5 times more mouth-teeth-jaw problems than female competition athletes (p < 0.001). Females showed themselves slightly more susceptible to mouth-teeth-jaw problems with resistance training than males (odds ratio [OR] = 1.45, p = 0.076). Negative oral effects were found to be 2.1 (p = 0.003) times higher for those who had been practicing for 10 years or more. It was concluded that a higher number of years of resistance training increased self-reported oral tissue trauma in the current cohort. Females were more likely to report orofacial problems than males.

Patient contact shielding to reduce radiation exposure to radiosensitive organs of patients is known to be used inconsistently in the field of dento-maxillofacial radiology (DMFR). There is an ongoing discussion if its use is still justified with regard to recent technical enhancements in the field. Thus, the aim of this study was to investigate the recommended and applied safety standards regarding dose protection measures in dental radiology within European countries. With an online questionnaire the use of safety measures, especially lead protection and collimation, in different patient groups (adults, children, pregnant women) was interrogated including leading experts in the field of DMFR. Among the 24 participants from 13 different countries, there was a tendency towards lead protection for intraoral radiography and towards collimation for extraoral radiography. Participants based their decision mainly on law and societal guidelines. Overall, the application of radiation protection measures varies within Europe. It seems safe to say that lead protection as a measure of radiation dose limitation is still recommendable even though collimation and technical advancements have led to great dose reductions. Collimation should be used more broadly and a standardization of protection measures and an update of radiation protection guidelines in Europe is desirable.

The case in this report presents an alternative, partially CAD/CAM-based fabrication of a gingival epithesis in a 48-years-old female patient. The patient suffered from a periodontits stage III, grade C. After a non-surgical periodontal treatment with adjunctive systemic antibiotics, the patient developed severe circumferential gingival recessions on the upper frontal teeth. Due to social discomfort and esthetic concerns, the indication for a gingival epithesis was made. After taking a conventional impression from the upper jaw, the cast model was scanned and the gingival epithesis was designed virtually at the laboratory. The epithesis was then milled from a block of high performance polymer. Minor adjustments of surface details were added manually. The result was a esthetically sufficient and by the patient well-accepted treatment modality. Further research is necessary to prove the feasibility of a full digital workflow and the long-term stability of CAD/CAMbased gingival epitheses.

Angina bullosa haemorrhagica (ABH; also: bullosa haemorrhagica oralis or "benign hemorrhagic bullous stomatitis") was first defined by Badham in 1967 as recurrent formation of blood blisters on the oropharyngeal mucosa as a result of mechanically traumatic irri- tation. A possible connection with previous damage to the mucosa due to general medical findings such as hypertension, diabetes mellitus or chronic inhalation of corticosteroids has not yet been confirmed.

We report the case of a 64-year-old patient with incidental finding of a unilocular radiolucency in the posterior mandible on an apical radiograph. The biopsy (cystostomy) revealed the unusual finding of a primary intraosseous mucoepidermoid carcinoma; this is with 2‑4% of ectopic manifestations of this entity a rarity. Molecular pathological analysis with a specific panel (SalvGlandDx) and FISH provided diagnosis-confirming evidence of the specific CRTC1-MAML2 fusion. Box resection, prophylactic osteosynthesis using a patient-specific reconstruction plate, neck dissection, and local coverage using a Bichat flap were performed according to the interdisciplinary tumor board decision. With tumor-free lymph nodes and R0 resection, adjuvant therapy was not required. Clinical and imaging follow-up over 24 months showed no evidence of locoregional recurrence. The presented case report emphasizes the central role of private dental practices in the early detection of oral malignancies. These should always be considered in the differential diagnosis of cystic lesions.

Tutor-supported comprehensive care training at the University of Bern School of Dental Medicine (SDM) has been used for many years. Therefore, the aim of this study was to evaluate dental students' opinions on tutor-supported training to identify key aspects of future course organisation that are important for students to achieve the minimum requirements for their graduation. A digital survey was developed and distributed among all fourth- and fifth-year dental students enrolled in the SDM in 2014 and 2016. A total of 28 (41.2%) and 21 (36.2%) students participated in the survey in 2014 and 2016, respectively. The average age of all respondents was 25.8 (±4.0) years. The proportion of females was 75% with no differences between groups, neither among classes nor years of the survey. The students felt well prepared following the bachelor's degree pre-clinical programme and a two-week introduction immediately preceding the clinical course. During clinical training, the students' experiences with their assigned tutors were positive even though waiting times for tutors during patient care as well as organisational efforts to manage attestations and logbooks were mentioned. For each discipline, patient assignment (ρ=0.54, p<0.0001) and frequently meeting with their tutors (ρ=0.56, p<0.0001) revealed the highest correlation with 1) achieving minimum requirements and 2) improving treatment planning skills in both fourth- and fifth-year dental students. In conclusion, tutor-supported comprehensive care training is well accepted by dental students while focusing on both patient assignment and frequent discussions with tutors may help students to better achieve minimum requirements in clinical dental education.

The diagnosis and treatment of amelogenesis imperfecta (AI) represents a considerable rehabilitative challenge. Three critical aspects must be emphasised in particular: 1. as a congenital dental dysplasia, AI is a congenital defect, is covered by federal disability insurance and requires early definitive treatment before the age of twenty; 2. treatment is complex, interdisciplinary and usually invasive; and 3. restorations must be fixed on structurally compromised tooth structure.

Low-level lasers (LLL) are used in the stomatology and oral surgery field of dentistry. Due to the biostimulation or biomodulation and photodynamic effect, the healing process of soft-tissue and bone wounds can be accelerated. The indication in oral surgery is to achieve a faster bone healing after tooth extraction, but also to improve the osseointegration in implants. The advantage in stomatology is pain alleviation and improved healing in aphthae and cold sores as well as symptom relief in mucositis. Due to the use free of side effects and low time effort, the LLL offers high patients' comfort.