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Purpose: To compare the efficacy of low-dose laser therapy to that of conservative treatment usingtwo different occlusal splints (stabilization and anterior repositioning splints) in patients with internalderangements of the temporomandibular joint (TMJ). Materials and Methods: The study populationconsisted of patients with disc displacement with reduction diagnosed according to the Research DiagnosticCriteria for Temporomandibular Disorders (RDC/TMD) Axis I and Axis II. In addition, disc displacement withreduction was confirmed in all patients using TMJ ultrasonography. These tests were conducted for 6 monthswith an interim control in the third month. The “clicking” sound from the joint on opening and closing themouth and the extent to which the mouth opened vertically and laterally were assessed. In all, 20 patientsreceived low-dose laser therapy, 20 were treated with a stabilization splint, and 20 were treated with ananterior repositioning splint. In addition, 10 untreated patients were included as a patient control group,and a further 10 healthy subjects were included as a healthy control group. Changes in the condition wereassessed based on the results of the RDC/TMD Axis II and with the use of an algometer. Results: Theanterior repositioning splint group showed improvement in the “clicking” sound during mouth opening.Lateral movement improved significantly in patients who received laser therapy. In the patient control group,the click disappeared during mouth opening, the algometrically determined pain improved, and the lateralmovement increased. There were no statistically significant differences between groups in the improvementof vertical mouth movement or in the clicking sound during mouth closing. Conclusion: Each treatmentmodality applied in this study separately produced positive results for the clicking sound, restrictions in verticaland lateral movements, and reduction of the pressure pain threshold observed in cases of TMJ irregularity.In conclusion, the decision regarding which treatment modality should be employed can be made based onthe patient’s symptoms. However, this study also indicates that TMJ derangements can resolve spontaneouslywhen left untreated.

Prosthetic rehabilitation in maxillectomy patients aims to separate the oral and nasal cavities to provide adequate articulation, restore the contour of the midface, and provide acceptable aesthetic results. This clinical case report describes prosthetic rehabilitation via placement of dental implants in the zygomatic bone in a patient who underwent partial maxillectomy because of osteosarcoma. The success of obturator placement after maxillectomy requires retention by the surrounding dental tissue or dental implants. When zygomatic implants cannot be used, dental implants placed in the zygomatic bone and attachments fastened to these implants can easily provide the retention and stability required by the obturator.

Aim: The aim of this study is to compare the diagnosis of patients with temporomandibular joint (TMJ) internal derangements which had been diagnosed using Research Diagnostic Criteria/Temporomandibular Disorders (RDC/TMD) with the dynamic high resolution sonography findings. Settings and Design: Axis I section of RDC/TMD form had been applied to participants. Participants were divided into three groups as healthy TMJ, disc displacement with reduction, and disc displacement without reduction. The diagnoses had been compared with the dynamic high-resolution sonography findings. Materials and Methods: Twelve of the patients had been treated with laser therapy, whereas 13 patients were treated with stabilization splint. Seventeen patients were treated with anterior repositioning splint (n = 42). After the application of different treatment modalities, the position of the articular disc had been determined with Axis I of RDC/ TMD form and dynamic high-resolution sonography. The findings were compared and statistically analyzed. Statistical Analysis Used: Statistical analyses of data were analyzed with Turcosa Cloud (Turcosa Ltd Co, Turkey). Results: For the right TMJ, pretreatment and posttreatment ultrasonography (USG) diagnoses and RDC/ TMD clinical diagnoses were found similar (κ = 0.125–0.008). No statistically significant relationship was found (P > 0.05). For the left TMJ, pretreatment USG diagnosis and RDC/TMD clinical diagnose were found similar (κ = 0.070). No statistically significant relationship was found (P > 0.05). For the left TMJ, posttreatment USG diagnosis and RDC/TMD clinical diagnose were compared. A statistically significant difference was found (κ = 0.256). A statistically significant relationship was found (P < 0.05). Conclusions: Axis 1 of RDC/TMD form which is used for the diagnosis of internal derangements and dynamic high resolution sonography was not found in the agreement.

© 2022 Allen Press Inc.. All rights reserved.In the all-on-four concept, the positions of both posterior and anterior implants can affect stress distribution. The aim of this study was to examine the effect of the position of anterior implants on stress distribution in the implant, the bone around the implant, and prosthetic components in the resorbed maxilla using the all-on-four concept. All-on-four designs were prepared with 3 different anterior implant positions in a fully edentulous maxilla. Anterior implants were placed axially in the central incisor area in model 1, in the lateral incisors area in model 2, and in the canine area in model 3, forming 3 groups. The von Mises and principal stresses in the bone tissue and the von Mises stresses in the implant and prosthetic components were evaluated by 3-dimensional finite element analysis. There were more stresses on the cortical bone than trabecular bone. The stresses on the bone tissue and implant components were generally concentrated around the posterior implant, whereas the stresses on the prosthetic components were generally concentrated in the anterior region. Changing the anterior implant positions from the central tooth to the canine tooth reduced the stress on the bone around the implant. The highest von Mises stresses occurred in the prosthetic superstructure in all models, whereas the lowest stresses occurred in the trabecular bone. Changing the position of the anterior implants from the central tooth to the canine area in the maxillary all-on-four concept created a favorable stress distribution.

Aim: The aim of this study was to evaluate the effects of two geometrically different fiber post systems and two different placing lengths on the stress distribution of endodontically treated teeth. Methodology: Four different mandibular premolar tooth models were created. These models were restored using oval or circular fiber posts with two different placing lengths. An oblique force of 300 N was applied to the top of the tooth, and von Mises stress evaluations were carried out on the dentin tissue, luting cement, and fiber posts. Results: The maximum von Mises stresses were observed in the 10-mm long circular fiber post model, while the minimum stresses were seen in the 5-mm long oval fiber post model. In general, the oval fiber post models presented more homogeneous stresses than the circular fiber post models. Moreover, the 10-mm long fiber post models generated greater von Mises stresses than the 5-mm long fiber post models in the dentin tissue and luting cement. Conclusion: According to the study findings, the use of oval fiber posts at both placing lengths is suggested for oval shaped root canals due to the lower stress concentrations. How to cite this article: Aslan T, Esim E, Kilic K, Er O, Yildirim S. Effects of the geometric shape and placing length of a fiber post on the stress distribution in a mandibular premolar tooth: A finite element analysis study Int Dent Res 2018;8(3):105-10. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Amaç: Temporomandibular düzensizlik (TMD), çiğneme kasları ve temporomandibular eklemin ağrı ve fonksiyon bozukluğu ile karakterize, birçok etyolojik koşulu içeren bir rahatsızlıktır. Çiğneme kaslarında ağrı, ağız açmada kısıtlılık, mandibular harekette deviasyon ve eklem sesi gibi semptomlar ile ortaya çıkan rahatsızlığın etyolojisinde bruksizm, maloklüzyonlar, dejeneratif eklem hastalıkları gibi iç etkenlerin yanı sıra emosyonel durumların etkili olduğu çevresel dış etkenler de rol oynamaktadır. Bu çalışmanın amacı; temporomandibular eklem iç düzensizliği olan hastaların yaş, cinsiyet, medeni durum, iş durumu ve eğitim durumu gibi demografik bilgilerinin incelenmesidir. Gereç ve Yöntemler: Araştırmaya dahil edilen hastalar Erciyes Üniversitesi Diş Hekimliği Fakültesi’ne temporomandibular eklemindeki problemden dolayı başvuran kişiler arasından randomize olarak seçilmiştir. Hastalardan bilgilendirilmiş onam formu alınmıştır. Çalışma toplamda 80 kişiyi kapsamaktadır. Bulgular: Araştırmadan elde edilen veriler incelendiğinde temporomandibular eklem iç düzensizliğinin kadınlarda erkeklere oranla (3.7/1) daha çok görüldüğü tespit edilmiştir. Yaş ortalamasının 26.90±10.33 olması, temporomandibular eklem iç düzensizliğinin gençlerde daha sık görüldüğünü ortaya koymuştur. Çalışmamızda medeni durum, eğitim durumu ve iş durumu ile hastalık arasında bir ilişki olmadığı saptanmıştır. Sonuç: Temporomandibular eklem iç düzensizliği kadınlarda erkeklere oranla daha çok görülmektedir. Yaş dağılımı hastalığa genç-orta yaş hastalığı kimliğini vermektedir. Çalışmamızda medeni durum, eğitim durumu ve iş durumu ile hastalık arasında bir ilişki olmadığı bildirilmiştir., Background: Temporomandibular disorder (TMD) is a disorder that includes many etiological conditions, characterized by chewing muscles and pain and dysfunction of the temporomandibular joint. In addition to internal factors such as bruxism, malocclusions, degenerative joint diseases, environmental external factors play an important role in the etiology of the discomfort that occurs with symptoms such as pain in the chewing muscles, restricted mouth opening, deviation in the mandibular movement and joint sound. The purpose of this study; It is the examination of demographic information of patients with temporomandibular joint internal derangement such as age, gender, marital status, job status and educational status. Methods: The patients included in the study were randomly selected among those who applied to Erciyes University Faculty of Dentistry due to the problem in the temporomandibular joint. Informed consent form was taken from the patients. The study covers 80 people in total. Results: When the data obtained from the study were examined, it was found that the temporomandibular joint internal derangement was more common in women than in men (3.7 / 1). The average age of 26.90 ± 10.33 revealed that temporomandibular joint internal derangement was more common in young people. In our study, it was found that there was no relationship between marital status, education status and job status and disease. Conclusion: Temporomandibular joint internal derangement is more common in women than in men. Age distribution gives the disease the identity of young-middle age disease. In our study, it was reported that there was no relationship between marital status, education status and job status and disease.

Objectives: One of the most common treatment modalities for patients with a diagnosis of reduced disc displacement is occlusal splinting. Stabilization splints (SS) and anterior repositioning splints (ARS) are frequently used in such cases.Materials and Methods: The effects of these two splint types on patient satisfaction were evaluated in patients with temporomandibular disorder (TMD). 25 healthy people with no pathology of the temporomandibular joint were included as a control group. ARS’s were used in 18 patients; all patients used the splints for 2 months. The splint was then converted into a stabilization splint for use for 1 further month. In the other 32 patients, a SS was used for 1 month. All the patients filled out the same temporomandibular questionnaire (TQ) again after the ARS was converted into a SS and had been used for 1 month.Results: The use of both types of splint significantly affected scores on the TQ (p < 0.05). There was a significant difference in questionnaire results among the control group, SS group, and ARS group before treatment (p < 0.05). There was no statistically significant difference in questionnaire results among the three groups after treatment (p > 0.05).Conclusion: These results indicate that the use of both ARS and SS significantly increased satisfaction among patients with TMD.

Introduction: Root canal perforation during endodontic therapy is one of the most commonly encountered clinical situations that necessitates interdisciplinary therapy.Case Presentation: This case report presents the use of periodontal and prosthodontic teamwork to treat severely deteriorated anterior esthetics caused by an iatrogenically induced marginal tissue recession defect.Conclusion: In the case of deterioration of anterior dental esthetics, an interdisciplinary approach can successfully restore both esthetics and function, as observed in this case report.

PURPOSE. The aim of this study was to evaluate whether the push-out bond strength varies between oval and circular fiber posts, and to examine the effect on the resin cement thicknesses around the posts. MATERIALS AND METHODS. Eighteen mandibular premolar roots were separated into two groups for oval and circular fiber posts systems. Post spaces were prepared and fiber posts were luted to the post spaces. Roots were cut horizontally to produce 1-mm-thick specimens. Resin cement thicknesses were determined with a metallographic optical microscope and push-out tests were done. RESULTS. No significant differences were observed in terms of push-out bond strength between the oval and circular fiber posts (P>.05) The resin cement thicknesses of the oval posts were greater than those of the circular posts group in the corona!, middle and apical specimens (P

The study aimed to evaluate the effects of different post morphologies and placement lengths on the fracture resistance of teeth with oval canal morphology that had been restored with crowns. Extracted mandibular premolars with similar dimensions were decoronated. After the root canal treatment, the teeth were mounted on acrylic blocks. Samples were randomly divided into four groups (n = 10 each). In groups C-10 and C-5, 10-mm- and 5-mm-long circular post spaces were created. In groups O-10 and O-5, 10-mm- and 5-mm-long oval post spaces were ultrasonically created. After post cementation, all specimens were restored with composite cores and prepared at height of 6 mm. Thereafter, all teeth were restored with crowns. After thermocycling, all specimens underwent fracture resistance testing. Oval posts and placement at 10-mm depth showed higher fracture resistance than circular posts and placement at 5-mm depth (P < 0.001). Increased post length and use of oval posts enhanced the fracture strength of teeth with oval canal morphology. Based on the results of this study, although the fracture resistance of teeth restored with crowns was enhanced by deep fiber post placement, the use of oval fiber post is recommended in cases where deep placement is impossible. (J Oral Sci 58, 339-345, 2016).

Farklı post boylarının ve farklı siman kullanımının kron ile restore edilmiş dişlerin kırılma dayanımına etkisi Amaç: Bu çalışmanın amacı post-kor ve kronla restore edilmiş dişlerde farklı simantasyon materyallerinin ve post uzunluklarının kırılma direncine etkisini değerlendirmektir. Gereç ve Yöntemler: Benzer boylara sahip 40 mandibular premolar dişin kronları uzaklaştırıldı. Kanal tedavileri yapıldıktan sonra dişler akrilik bloklara gömüldü. Örnekler ilk olarak ikiye ayrıldı. 10 mm ve 5 mm derinliklerinde sirküler post boşlukları, sırasıyla #0.5 ve #2 kodlu üretici frezleri ile hazırlandı. Post (D.T. Light-Post) simantasyonu aşamasında, her post grubundaki 10 örnek kendinden adezivli rezin siman (Rely X) ile simante edildi. Diğer 10 örnek kendinden asitli kompozit siman (Clearfill Esthetic Cement) ile simante edildi (n=10). Tüm örnekler kompozit korlar ile restore edildi ve toplamda yaklaşık 5°’lik konverjans açısıyla 6 mm boyunda (1 mm ferrule dahil) prepare edildi. Sonra, tüm dişler tam metal kronlarla, cam iyonomer simanla simante edilerek restore edildi. Termal döngü ile yorma sonrası, tüm örneklere kırılma dayanımı testi (0,5 mm/min) uygulandı. Data iki yönlü varyans analizi kullanılarak analiz edildi (α=0.05). Bulgular: Farklı tip siman kullanımı restore edilmiş dişlerin kırılma dayanımını etkilemezken (p=0.209), 10 mm derinlikte post yerleşimi 5 mm derinlikte yerleşime göre daha yüksek kırılma dayanımı göstermiştir (p, Effects of different cement usage and different post lengths to the fracture resistance of crown resorted teeth Background: The aim of this study is to evaluate the effect of post lengths and different cementation materials on the fracture resistance of teeth which restored with post-cores and crowns. Methods: Forty mandibular premolars with similar dimensions were decoronated. After the root canal treatment, the teeth were embedded in acrylic blocks. Specimens were fistly divided into 2 groups. 10-mm- and 5-mm-long circular post spaces were prepared with using #0.5 and #2 coded manufacturer’s drills, respectively. At the post (D.T. Light-Post) cementation stage, 10 specimens in each post group were cemented with a selfadhesive resin cement (Rely X). The other 10 specimens were cemented with self-etch cement (Clearfill Esthetic Cement) (n=10). All specimens were restored with composite cores and prepared at a height of 6 mm (including 1 mm ferrule) and a convergence angle of approximately 5° in total. Then, all teeth were restored with full metal crowns and cemented with a glass ionomer cement. After thermocycling, all specimens were subjected to fracture resistance testing (0,5 mm/min). Data were analyzed using the two-way ANOVA test (α = 0.05). Results: Usage of different type of cement did not effect the fracture resistance of crown-restored (p=0.209), while 10-mmlong post placement provided higher fracture resistance when compared to 5-mm-long post placement (p

WOS: 000325843200003, Background/purpose: Several all-ceramic materials have been developed to meet the most challenging requirements in restorative dentistry. However, only limited reports have focused on the issue of biocompatibility of all-ceramics. The purpose of this study was to evaluate the effects of different types of all-ceramic substructural materials to determine their biological performance under experimental conditions. Materials and methods: We tested six all-ceramic systems [glass-infiltrated alumina-reinforced ceramic (In-Ceram Alumina, Turkom Cera), glass-infiltrated zirconia-toughened alumina ceramic (In-Ceram Zirconia), low-fusing ceramic (Finesse), yttria-stabilized tetragonal zirconia ceramic (Zirkonzahn), and lithium disilicate glass ceramic (IPS e.max)] using a tetrazolium assay prior to and 3 days after aging, to determine their ability to alter cellular mitochondrial dehydrogenase activity. Mann-Whitney U test and Wilcoxon t test were used for statistical analysis (alpha = 0.05). Results: According to the results of the 3-(4,5-dimethyl-thiazol-2yl-)-2,5-diphenyl tetrazolium bromide tests, the toxic effects of Finesse and Zirkonzahn were statistically insignificant (P > 0.05) compared with the negative control group. In contrast, In-Ceram Alumina, In-Ceram Zirconia, Turkom Cera, and IPS e.max demonstrated statistically significant toxic effects (P < 0.05) compared to the negative control group. When effects of aging on cytotoxic properties were evaluated, In-Ceram Zirconia and Turkom Cera showed increased cytotoxic effects on the 1st day following the aging process, whereas IPS e.max and Zirkonzahn displayed cytotoxic effects on the 2nd day and Day 7, respectively. The cytotoxic effect of;Zirkonzahn and IPS e.max was decreased on the 1st day and at the 2nd week, respectively. Conclusion: Several types of all-ceramic substructures did not cause the same in vitro. responses. Finesse and Zirkonzahn did not carry high biologic risk. However, our results suggest that In-Ceram Alumina, In-Ceram Zirconia, Turkom Cera, and IPS e.max should not be considered as entirely biocompatible materials. Copyright (C) 2012, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. All rights reserved., Department of Scientific Research Projects of Erciyes University, The authors thank Dr Aslihan Usumez and Dr Ahmet Ozturk for their valuable contributions in the assessment of study results and preparation and writing of this manuscript. The authors gratefully acknowledge financial support from the Department of Scientific Research Projects of Erciyes University.

Aim: This case report describes the use of a surgical guide in a crown-lengthening procedure to improve the aesthetics of the anterior interdental papillae in an adult female patient. Methodology: A 40-year-old female underwent a crown-lengthening procedure with guidance provided by a surgical template to correct unsatisfactory aesthetics in the anterior gingiva and prosthesis. Results: The patient’s functional and aesthetic expectations were met successfully with interdisciplinary treatment, including surgical crown lengthening and the placement of all-ceramic restorations. Conclusions: This case showed that satisfactory anterior aesthetics can be achieved by comprehensive examination, careful planning of treatment employing a surgical guide, and prosthodontist–periodontist teamwork, even in the complete absence of interdental papillae. How to cite this article: Kılıç D, Alkan BA, Kılıç K. Use of a Surgical Guide in a Crown-Lengthening Procedure to Improve the Aesthetics of the Interdental Papillae: A Case Report. Int Dent Res 2012;2:75-80. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

The effects of desensitizer, disinfectant, saliva, blood, and hydrogen peroxide on the tensile bond strength between adhesive and ceramic as well as between adhesive and dentin were examined. Sixty 7x3 mm pressed ceramic discs of IPS e.max were fabricated and randomly assigned to six groups of different dentin surface treatments (control, desensitizer, disinfectant, saliva, blood, and hydrogen peroxide). Representative samples of fractured specimens were observed by SEM (scanning electron microscopy). There were significant differences between the control group and saliva, blood, and hydrogen peroxide groups (p0.05). Results of this study suggested that only saliva, blood, and hydrogen peroxide influenced the tensile bond strength between dentin and ceramic.

Objectives: The aim of this study was to investigate surface roughness in provisional crown acrylics, after polishing, reinforced with different concentrations of glass fibers.Methods: A total of 48 disk-shaped specimens were prepared using autopolymerizing acrylic resin. These specimens were divided into four groups according to the level of glass fiber added: Group A (no fiber), Group B (0.5%), Group C (1%) and Group D (2%). After polishing the specimens, an average surface roughness (Ra) value was calculated using a profilometer from four randomly selected points on the surface.Results: A significant difference was determined among the surface roughness values of provisional crown resins to which different concentrations of fiber had been added (PConclusions: The reinforcement of provisional crown and fixed partial denture resin with glass fibers increases surface roughness. (Eur J Dent 2008;2:185-190)

PURPOSE. The aim of the present study was to evaluate the effects of posts with different morphologies on stress distribution in an endodontically treated mandibular premolar by using finite element models (FEMs). MATERIALS AND METHODS. A mandibular premolar was modeled using the ANSYS software program. Two models were created to represent circular and oval fiber posts in this tooth model. An oblique force of 300 N was applied at an angle of 45 to the occlusal plane and oriented toward the buccal side. von Mises stress was measured in three regions each for oval and circular fiber posts. RESULTS. FEM analysis showed that the von Mises stress of the circular fiber post (426.81 MPa) was greater than that of the oval fiber post (346.34 MPa). The maximum distribution of von Mises stress was in the luting agent in both groups. Additionally, von Mises stresses accumulated in the coronal third of root dentin, close to the post space in both groups. CONCLUSION. Oval fiber posts are preferable to circular fiber posts in oval-shaped canals given the stress distribution at the post-dentin interface., http://jap.or.kr/DOIx.php?id=10.4047/jap.2013.5.4.434