Silika İle Güçlendirilmiş Maksillofasiyal Silikon Elastomerlerin Fiziksel Özelliklerinin Değerlendirilmesi

Amaç: Yüz protezi uygulamalarında kullanılan silikon elastomerlerde karşılaşılan en büyük problemlerden biri özellikle protez kenarlarda meydana gelen yırtılmalar ve bu sebeple protezin yenilenme ihtiyacıdır. Çalışmanın amacı silikon elastomerleri güçlendirmede kullanılan silikanın farklı oranlarda ilavesinin fiziksel özelliklere etkisini değerlendirmektir.     Gereç ve Yöntem: Çalışmada, silikon elastomerlere %10, 20 ve 30 oranında silika ilave edildi. Daha sonra çekme direnci, uzama yüzdesi, yırtılma direnci ve sertlik değerleri ölçüldü. Çalışma verileri değerlendirilirken niceliksel verilerin karşılaştırılmasında tekrarlayan ölçümlerde varyans analizi ve anlamlılığa neden olan ölçümün tespitinde Post-Hoc Bonferroni Test kullanıldı. Anlamlılık p<0.05 düzeyinde değerlendirildi.     Bulgular: Çekme direnci en yüksek olarak %20 oranında silika ilave edildiğinde gözlendi. Uzama oranı ise en fazla saf silikonda ve bunu takiben %10’luk silika ilavesinde görüldü. Yırtılma direnci en fazla %30 silika ilaveli silikonda gözlendi. Bununla beraber sertlik de en fazla bu oranda izlendi.                Sonuç: Silikon elastomerlerine %20’lik silika ilavesi malzemenin mukavemetini pozitif yönde etkilemektedir. Bunun üzerindeki oranlarda yapılan ilavenin yapıyı bozduğu görülmüştür. &nbsp

Group 2 ITI Consensus Report: Prosthodontics and implant dentistry

ObjectivesWorking Group 2 was convened to address topics relevant to prosthodontics and dental implants. Systematic reviews were developed according to focused questions addressing (a) the number of implants required to support fixed full‐arch restorations, (b) the influence of intentionally tilted implants compared to axial positioned implants when supporting fixed dental prostheses (FDPs), (c) implant placement and loading protocols, (d) zirconia dental implants, (e) zirconia and metal ceramic implant supported single crowns and (f) zirconia and metal ceramic implant supported FDPs.Materials and methodsGroup 2 considered and discussed information gathered in six systematic reviews. Group participants discussed statements developed by the authors and developed consensus. The group developed and found consensus for clinical recommendations based on both the statements and the experience of the group. The consensus statements and clinical recommendations were presented to the plenary (gathering of all conference attendees) and discussed. Final versions were developed after consensus was reached.ResultsA total of 27 consensus statements were developed from the systematic reviews. Additionally, the group developed 24 clinical recommendations based on the combined expertise of the participants and the developed consensus statements.ConclusionsThe literature supports the use of various implant numbers to support full‐arch fixed prostheses. The use of intentionally tilted dental implants is indicated when appropriate conditions exist. Implant placement and loading protocols should be considered together when planning and treating patients. One‐piece zirconia dental implants can be recommended when appropriate clinical conditions exist although two‐piece zirconia implants should be used with caution as a result of insufficient data. Clinical performance of zirconia and metal ceramic single implant supported crowns is similar and each demonstrates significant, though different, complications. Zirconia ceramic FDPs are less reliable than metal ceramic. Implant supported monolithic zirconia prostheses may be a future option with more supporting evidence.</p

PATIENT SATISFACTION WITH DENTURE ADHESIVES USED IN COMPLETE DENTURES

Introduction: This study investigates the effect of using denture adhesives on patient satisfaction in patients wearing new dentures

Facial defects restored with extraoral implant-supported prostheses

A facial defect results in cosmetic, functional, and psychologic problems and acts as a difficult and challenging procedure for the maxillofacial surgeon and the prosthodontist. Retention of a facial prosthesis is an important key in the patient's satisfaction and acceptance. The introduction of extraoral implant applications have been accepted as an advanced retention method. The purpose of this article is to report the results from our clinical experience with patients wearing facial prostheses anchored to extraoral ITI implants (Straumann, AG, Basel, Switzerland)

Assessment of Implant Stability of Patients With and Without Radiotherapy Using Resonance Frequency Analysis

The purpose of this study was to clinically monitor the stability of dental implants in patients with and without a history of radiotherapy, using resonance frequency analysis over 1 year. The stability of patients with 80 implants was monitored with resonance frequency analysis (Osstell Mentor) over 1 year. Data were assessed with Mann-Whitney U test and correlation analysis. Irradiated maxillary implants showed statistically lower values than the mandibular implants at a significant level (P < .05)

Treatment Outcome of Extraoral Implants in the Craniofacial Region

Extraoral implants for the retention of facial prosthesis have been used for better support, stability, and retention. Other than the clinical experiences, treatment outcomes of these prostheses should be evaluated for predicting the long-term success. The aim of this study was to evaluate the survival rates and soft tissue responses of extraoral implants. In total, 52 patients were examined, including 16 with auricular defects, 16 with orbital defects, 13 with nasal defects, and 7 with midfacial defects. Data on implant length and location, radiation-treatment history, systemic diseases, and alcohol and cigarette use were collected and assessed, and data on the health of periimplant soft tissue were recorded for all of the defects. Statistical analyses were performed with t and chi(2) tests and correlation and regression analyses for the determination of the survival rate. According to results, the defect area has a significant effect on success rate. The overall success rate was found highest in the auricular area and least in the midfacial area. The presence of diabetes, alcohol use, and age were found as significant factors for implant loss, whereas smoking and radiotherapy were found as insignificant

A Preoperative Appliance for a Newborn With Cleft Palate

Cleft palate is a commonly observed congenital maxillofacial defect. One of the most important problems with clefts is the interference with feeding. An affected infant cannot produce negative pressure in the oral cavity and therefore cannot move the bolus backward to the pharynx. To obtain better nutritional intake prior to surgical correction, a palatal lift obturator is recommended. In this clinical report, a modified technique of obturator fabrication is presented. The new method uses a piece of tulle, a flexible and durable material that is frequently used in theater attire. With the help of this material, the bulb part is connected to the plate as a labile piece, and this connection acts like a natural velopharyngeal extension. Additionally, because of the softer property of the silicone elastomer, the posterior pharyngeal wall is less irritated

The effects of two methods of Class III malocclusion treatment on temporomandibular disorders

The aim of this research was to evaluate, within a controlled clinical study, the effects of a Delaire-type facemask or a modified Jasper Jumper (JJ) used in the treatment of children with Class III malocclusions due to maxillary retrognathia on temporomandibular disorders (TMDs)