Fiberle güçlendirilmiş kompozit köprü (vaka raporu)

Since glass fiber reinforced composite (FRC) fixed partial dentures have aesthetic and economic superiorities, are easy to repair and require no preparation on sound teeth, they present an alternative treatment and advantage choice both for patient and the clinician. Today FGK restorations are becoming more popular with developing of the mechanical and esthetics characteristic since its introduction. FGK prosthesis can be fabricated either by a dental technician in the dental laboratuary or by a dentist in chairside. FGK restorations contain a fiber reinforced composite substructure and a special composite material covering it. When compared with metal substructures, their advantages are translucency, good adhesion, easy repair capability and non-corrosiveness. This case report describes treatment of a patient with unaesthetic appearance because of the maxillary missing left lateral and cross occlusion the maxillary left canin teeth using fiber reinforced composite resin-fixed partial denture. This treatment choice eliminated the longtime orthodontic treatment and preparation on sound teeth. ÖZET Günümüzde fiberle güçlendirilmiş kompozit (FGK) sabit parsiyel protezler estetik ve ekonomik olmaları, kolay tamir edilebilmeleri ve destek dişlerde fazla preperasyon gerektirmemeleri sayesinde hem hasta hem de hekim açısından alternatif ve avantajlı bir tedavi seçeneği sunmaktadır. FGK’ler geliştirilen mekanik ve estetik özellikleri ile daha popüler bir hale gelmiş ve FGK sistemlerin restoratif diş hekimliğinde kullanımları ilk üretildikleri günden bugüne artmıştır. FGK sabit parsiyel protezler, diş teknisyeni tarafından laboratuarda veya diş hekimi tarafından hasta başında hazırlanabilmektedirler. FGK sabit parsiyel protezler, fiberle güçlendirilmiş bir kompozit altyapıyı ve onu kaplayan özel kompozit materyalini içerirler. Metal alaşımlarla kıyaslandıklarında translüsent olmaları, iyi bağlanabilme özelliklerinin olması ve tamir edilebilmelerinin kolay olması yanında koroziv olmamaları gibi dişer avantajları da bulunmaktadır. Bu çalışmada, maksillar sol lateral diş eksikliği ve maksillar sol kanin dişin ters kapanışta olan bir hastadaki estetik bozukluğun, uzun ortodontik tedavi yada implant cerrahisine gerek kalmaksızın az bir preperasyonla FGK köprü ile tedavisi anlatılmaktadır. Anahtar Kelimeler; Fiberle güçlendirilmiş kompozit köprüler, adeziv köprüler

Total and partial ear epithesis : two case reports with review of literature.

Auricular defects may be congenitally or occur secondary to trauma or surgical removal of a neoplasm. Treatment options for the reconstruction of the ear may include either plastic surgery or provision of an auricular prosthesis.The requirements of prosthesis are esthetics, retention and stability, alignment and positioning, biocompatibility, and longevity. In the present study we present  2 patients (a partial and a total auricular defects) were rehabilitated with epistheses that were constructed on endosteal titanium implants of the ITI system with magnetive anchors in mastoid process. The success of both 2 epithesis compared in terms of function, aesthetics and psychological activity

Effects of different glass fibers on the transverse strength and elastic modulus of repairing acrylic resin

Objectives: The aim of this study was to evaluate the transverse strength and the elastic modulus of a heat-polymerized denture base resin repaired by adding various glass fibers into  an autopolymerizing acrylic resin. Background: The key problems frequently encountered in dentures are fractures. A durable repairing system for a denture base fracture is desired to avoid recurrent fracturing. Materials and Methods: Fifty rectangular (65 mm × 10 mm × 2.5 mm) heat polymerized resin specimens were prepared which were divided in to five groups, with each including ten specimens. For the repairing procedure, samples with the autopolymerizing resin reinforced with stick, woven and chopped glass fibers were prepared. In addition, control samples with the autopolymerizing resin alone (in the absence of the glass fibres) were also obtained. Three-point bending tests were performed on all specimens. Results: The mean transverse strength for the control samples was 78.93 MPa. The specimens repaired with stick fiber reinforced resin exhibited the highest mean transverse strength of 83.16 MPa. The mean elastic modulus of the control specimens was 2121.86 MPa. The mean elastic modulus of the stick group was 7420 MPa. The elastic modulus values of the stick fiber reinforced specimens were significantly higher than the other groups (p<0.05). Conclusions: Amongst all samples, the transverse strength and elastic modulus of the stick fiber reinforced samples was found to be the highest

A longitudinal study on lung disease in dental technicians: What has changed after seven years?

Objectives: The aim of this 7-year follow-up study was to determine respiratory changes in dental technicians. Material and Methods: In our region, in the year 2005, 36 dental technicians were evaluated with a cross-sectional study on respiratory occupational diseases, and in 2012 we evaluated them again. Inclusion of information on respiratory symptoms and demographic features questionnaires was applied. Pulmonary function tests (PFT) were performed. Chest X-rays (CXR) were evaluated according to the ILO-2000 classification. For the comparisons of the technicians' findings in 2005 and 2012, data analyses were performed with the Wilcoxon test in addition to descriptive statistical procedures. Results: In 2012, 19 out of the 36 technicians continued to work in the same place, so we were able to evaluate their findings. The prevalence of respiratory symptoms in dental technician was as follows: dyspnea 7 (37%), cough 6 (32%), and phlegm 5 (26%). According to ILO classifications in 2005, among the 36 technicians, 5 (13.8%) had pneumoconiosis. At the end of 7 years, there were 9 pneumoconiosis cases among the 19 remaining technicians (47%). Thus, there was a statistically significant progression on the profusion of the radiologic findings (p < 0.005). Also there was a significant worsening on spirometric findings (p < 0.05). Conclusion: In dental technicians, a determination of both radiologic and functional progressions at the end of 7 years demonstrate that the primary and secondary preventive measures are necessary for these workplaces. Workplaces must be regularly controlled for worker health and hygiene

Gastroözofagal reflü hastalığı olan bireylerdeki diş erozyon sıklığının araştırılması

Purpose: The aim of this study was to investigate the relationship between dental erosion and GERD. Material and Methods: A total of 100 patients; 50 patients diagnosed with GERD and 50 patients as a control were involved in this study. The patients are classified as their sex, the place of erosion, oral hygiene habit and the degrees of erosion. Oral examination to quantify loss of tooth structure was done by scale of Eccles. Results: In this study the prevalance of dental erosion in patient with GERD was found 80%. Erosion of anterior teeth’s palatinal surfaces was observed more than the erosion of posterior teeth’s buccal and occlusal surfaces. In terms of sex it was analyzed that the GERD patients of men’s teeth (% 96) became more erosion than the GERD patients of women’s (% 65). Conclusion: The people having GERD illness may appear teeth erosion in a high ratio. Because of this reason, at the systemic diseases, the protector and prothetic treatment of teeth and medical treatment can be suggested. ÖZET Amaç: Bu çalışma gastrointestinal reflü hastalığı ile diş erozyonu arasındaki ilişkinin incelenmesi amacı ile yapıldı. Gereç ve Yöntem: Bu çalışma 50 kişi kontrol grubu, 50 kişi Gastroözofagal Reflü hastası toplam 100 kişi üzerinde yapıldı. Hastalar, cinsiyet, erozyonun bulunduğu yer, oral hijyen alışkanlığı ve erozyonun derecesine göre sınıflandırıldı. Diş yapısındaki kaybın derecesi Eccles skalasına göre belirlendi. Bulgular: GÖR hastaların % 80’inde çeşitli derecelerde aşınma olduğu tespit edildi. Kesici dişlerin palatinal yüzlerindeki aşınma, posterior dişlerin bukkal ve okluzal yüzlerindeki aşınmalardan daha fazla olduğu görüldü. Cinsiyet yönünden ise GÖR’lü erkeklerin (% 96) bayanlara ( % 65) oranla daha fazla diş aşınmaları olduğu tespit edildi. Sonuç: GÖR hastalığı olan bireylerde dişlerde erozyon görülme yüzdesi fazla olup, bu nedenle sistemik hastalığın ilaçla tedavisi ve dişlerde koruyucu ve protetik tedavilerin yapılması önerilebilir. Anahtar Kelimeler: Gastroözofagal reflü, diş erozyon

A longitudinal study on lung disease in dental technicians: What has changed after seven years?

Objectives: The aim of this 7-year follow-up study was to determine respiratory changes in dental technicians. Material and Methods: In our region, in the year 2005, 36 dental technicians were evaluated with a cross-sectional study on respiratory occupational diseases, and in 2012 we evaluated them again. Inclusion of information on respiratory symptoms and demographic features questionnaires was applied. Pulmonary function tests (PFT) were performed. Chest X-rays (CXR) were evaluated according to the ILO-2000 classification. For the comparisons of the technicians' findings in 2005 and 2012, data analyses were performed with the Wilcoxon test in addition to descriptive statistical procedures. Results: In 2012, 19 out of the 36 technicians continued to work in the same place, so we were able to evaluate their findings. The prevalence of respiratory symptoms in dental technician was as follows: dyspnea 7 (37%), cough 6 (32%), and phlegm 5 (26%). According to ILO classifications in 2005, among the 36 technicians, 5 (13.8%) had pneumoconiosis. At the end of 7 years, there were 9 pneumoconiosis cases among the 19 remaining technicians (47%). Thus, there was a statistically significant progression on the profusion of the radiologic findings (p < 0.005). Also there was a significant worsening on spirometric findings (p < 0.05). Conclusion: In dental technicians, a determination of both radiologic and functional progressions at the end of 7 years demonstrate that the primary and secondary preventive measures are necessary for these workplaces. Workplaces must be regularly controlled for worker health and hygiene

Fracture Resistance of Molar Crowns Fabricated with Monolithic All-Ceramic CAD/CAM Materials Cemented on Titanium Abutments: An In Vitro Study

PURPOSE To assess the fracture resistance of single-tooth implant-supported crown restorations made with different CAD/CAM blocks. MATERIALS AND METHODS Thirty-six titanium abutments were put on dental implant analogs (Mis Implant). For each of three test groups (n = 12/group), implant-supported, cement-retained mandibular molar single crowns were produced. Crowns were made of lithium disilicate glass (LD) IPS e.max CAD, feldspathic glass ceramic (FEL) Vita Mark II, and resin nano-ceramic (RNC) Lava Ultimate. The crowns were cemented with self-adhesive resin cement RelyX Unicem 2. After chewing cycling, crowns were tested to failure in a universal testing machine. Fracture values were calculated as initial (F-initial) and maximum fracture (F-max). RESULTS The study groups were ranked, in order of having highest value, (LD > FEL) > RNC for F-initial load value and (LD > RNC) > FEL for F-max load value. This demonstrated that there was no parallel change in the F-initial and F-max values presenting the fracture resistance of specimens. CONCLUSIONS There was no accordance between the F-initial and F-max values of the LD, RNC, and FEL after chewing simulation with thermocycling resembling 5 years of clinical functional use. LD had the highest fracture resistance during the fracture test. RNC had low fracture resistance; however, it had considerably high fracture resistance during the fracture test. FEL had considerably low fracture resistance values

The Effects of Er:YAG, Nd:YAG, and Ho:YAG Laser Surface Treatments to Acrylic Resin Denture Bases on the Tensile Bond Strength of Silicone-Based Resilient Liners

Objective: The present study was to assess the effect of surface treatments of Er:YAG, Nd:YAG, and Ho:YAG lasers on the tensile bond strength of a silicone-based resilient liner to an acrylic denture in an in vitro setting. Methods: Experimental dumbbell-shaped specimens (75mm) were produced by combining two acrylate pieces fabricated from heat-polymerized acrylic resin (36mm) with 3mm of Molloplast((R))-B filling between them. The specimens (n=200) were randomly divided in half for thermocycling, and each 100 specimen set was randomized into five groups (n=20) with different surface treatments: control (no surface treatment), sandblasting, Er:YAG laser, Nd:YAG laser, and Ho:YAG laser. A tensile bond strength test was performed. The effect of the laser surface treatments was examined with scanning electron microscopy. Results: Only the Er:YAG laser increased the tensile bond strength compared with the other treatments. The other laser groups showed lower bond strengths. The Ho:YAG laser resulted in considerably reduced tensile bond strength. The scanning electron microscopy images showed that applying laser surface treatments modified the surface of the denture base resin. Conclusions: There was not an overall improvement with the use of the studied laser modalities in the adhesion quality of resilient denture liner to acrylic resin, although Er:YAG laser showed a potential to improve their adhesion. These laser modalities need to be subjected to further studies to determine optimal setup for use in prosthodontics

Applying the WHO ICF framework to long COVID patients with persistent respiratory symptoms

Article; Early AccessObjectives: The aim of this study was to evaluate long COVID patients with persistent respiratory symptoms through the application of the World Health Organization (WHO) International Classification of Functioning, Disability and Health (ICF) framework.Patients and methods: This national, prospective, multicenter, cross-sectional study was conducted with 213 patients (118 females, 95 males; median age 56 years; range, 20 to 85 years) with long COVID between February 2022 and November 2022. The ICF data were primarily collected through patient interviews and from the acute medical management records, physical examination findings, rehabilitation outcomes, and laboratory test results. Each parameter was linked to the Component Body Functions (CBF), the Component Body Structures (CBS), the Component Activities and Participation (CAP), the Component Environmental Factors (CEF), and Personal Factors according to the ICF linking rules. Analysis was made of the frequency of the problems encountered at each level of ICF category and by what percentage of the patient sample.Results: In the ICF, 21 categories for CBF, 1 category for CBS, and 18 categories of CAP were reported as a significant problem in a Turkish population of long COVID patients with persistent respiratory symptoms. Furthermore, eight categories for CEF were described as a facilitator, and four as a barrier.Conclusion: These results can be of guidance and provide insight into the identification of health and health-related conditions of long COVID patients with persistent respiratory symptoms beyond the pathophysiological aspects, organ involvement, and damage of COVID-19. The ICF can be used in patients with long COVID to describe the types and magnitude of impairments, restrictions, special needs, and complications