Avoiding biofilm formation on dentures is associated with maintaining the surface properties of acrylic-based dentures. The aim of the study is to investigate the effects of two different cleaning agents (Corega and Klorhex 0.2% chlorhexidine gluconate) on surface roughness of the denture regarding efficacy of curing procedures. A total of sixty disc-shaped specimens were prepared with two different methods as long and short curing processes. The specimens were divided into subgroups according to the immersion solutions (distilled water, Corega tablet group and Klorhex 0.2% chlorhexidine gluconate group) (n=10). The samples were kept in a solution for 8 hours per day during a month. The average Ra1 (before exposure to the cleanser agent) and Ra2 (after exposure to the cleanser agent) of each sample was measured. A two-way ANOVA and post hoc Tukey test was used for statistical analysis. The solutions significantly increased the Ra values in both acrylic groups (p<0.001). While the effect of the distilled water group was significantly lower than Corega and Klorhex in the long-term curing group (p<0.05), no significant difference was found in the short-term curing group (p>0.05). The long-term curing time is highly effective in decreasing the surface roughness of the acrylic base material.

Statement of problem The COVID-19 pandemic impacted every area of our lives, including delaying urgent dental care. However, studies evaluating how patients using dental prostheses have been affected by the pandemic are lacking. Purpose The purpose of this study was to investigate how patients using different types of dental prostheses were being affected by the COVID-19 pandemic. Material and methods A total of 129 randomly selected individuals from among those who had been examined in the same clinic before the COVID-19 outbreak were included in the study. The study participants were divided into 4 groups according to their type of prosthesis: complete dentures, implant-retained removable dentures, tooth-supported fixed partial dentures, and implant-supported fixed partial dentures. The Oral Health Impact Profile (OHIP-14) questionnaire was implemented by telephone interviews with the study participants, who were also asked about their concerns and steps made regarding prosthetic hygiene during the COVID-19 pandemic. Data were evaluated by the Kruskal-Wallis and post hoc Dunn tests, and multivariate logistic regression analysis with forward selection was carried out to identify predictors of the oral health-related quality of life (OHRQoL) status (α=.05). Results OHIP-14 total scores did not vary significantly among the groups ( P >.05). When the domain scores of OHIP-14 were considered separately, the analysis revealed that the implant-retained removable denture group had significantly poorer functional limitations when compared with the tooth-supported fixed partial denture ( P =.005) and implant-supported fixed partial denture ( P =.031) groups. The results of the multivariate logistic regression analysis indicated a statistically significant association between OHRQoL during the COVID-19 pandemic and the frequency of tooth or denture cleaning (1 time a day versus less than 1 time a day: P =.011; 2-3 times a day versus less than 1 time a day: P =.032). Conclusions All prosthesis users exhibited increased interest in dental hygiene and an increase in the frequency of prosthesis cleaning during the pandemic. Furthermore, the study determined that the frequency of tooth or denture cleaning was associated with significantly improved OHRQoL during the time of the COVID-19 pandemic. Among the denture groups, those treated with implant-retained removable dentures had the poorest functional limitation in terms of OHRQoL, which can be linked to postponement of routine maintenance appointments. Therefore, providing all patients with scientifically sound information on prosthetic care during a pandemic would be highly beneficial.

The aim of this study was to investigate the shear bond strength of luting cements used with implant retained restorations on to titanium specimens after different surface treatments. MATERIALS AND METHODS. One hundred twenty disc shaped specimens were used. They were divided into three groups considering the surface treatments (no treatment, sandblasting, and oxygen plasma treatment). Water contact angle of specimens were determined. The specimens were further divided into four subgroups (n=10) according to applied cement types: polycarboxylate cement (Adhesor Carbofine-AC), temporary zinc oxide free cement (Temporary Cement-ZOC), non eugenol provisional cement for implant retained prosthesis (Premier Implant Cement-PI), and non eugenol acrylic-urethane polymer based provisional cement for implant luting (Cem Implant Cement-CI). Shear bond strength values were evaluated. Two-way ANOVA test and Regression analysis were used to statistical analyze the results. RESULTS. Overall shear bond strength values of luting cements defined in sandblasting groups were considerably higher than other surfaces (P<.05). The cements can be ranked as AC > CI > PI > ZOC according to shear bond strength values for all surface treatment groups (P<.05). Water contact angles of surface treatments (control, sandblasting, and plasma treatment group) were 76.17° ± 3.99, 110.45° ± 1.41, and 73.80° ± 4.79, respectively. Regression analysis revealed that correlation between the contact angle of different surfaces and shear bond strength was not strong (P>.05). CONCLUSION. The retentive strength findings of all luting cements were higher in sandblasting and oxygen plasma groups than in control groups. Oxygen plasma treatment can improve the adhesion ability of titanium surfaces without any mechanical damage to titanium structure.

ÖZETÇene yüz protezleri çeĢitli sebeplerle meydana gelen defektler sonucunda bozulan bütünlüğün iyileĢtirilmesi amacıyla yapılan protetik uygulamalardır. Bu protezlerin yapımında kullanılan materyallerin sahip oldukları özellikler; estetik dayanıklılık ve hasta konforunu önemli ölçüde etkiler. Çene-yüz protezlerinde baĢarının sağlanabilmesi, protez yapımında vakaya uygun özellikte materyallerin kullanılması ile mümkündür. Yapılan bu derleme çalıĢmasında çene-yüz protezlerinin geliĢimine değinilmiĢ ve günümüzde çene-yüz protezlerinde kullanılan materyallerin özellikleri avantaj ve dezavantajları ile açıklanmıĢtır. AnahtarKelimeler: Çene-yüz protezleri, elastomerler, silikonlar, renk pigmentleri. GĠRĠġÇene yüz bölgesindeki yapıların bütünlüğünün herhangi bir sebeple bozulması sonucu çene yüz defektleri oluĢur.1 Bu sebeplerin arasında hemifasiyal mikrozomi gibi doğumsal veya tümör, travma gibi edinsel durumlar sayılabilir. 2-5 Tıp alanındaki geliĢ-meler neticesinde kanser vakalarının iyileĢmelerindeki artıĢ ve sağkalım sürelerinin uzaması ile beraber çene yüz protezleri vakalarında da artıĢlar görülmektedir. 6Çene yüz protezinin amacı; hastanın kaybolan çiğne-me, solunum, yutkunma gibi fonksiyonlarını hastaya kazandırmanın yanında kaybolan estetik ve olumsuz etkilenen sosyal durumunun da iyileĢtirilebilmesidir. Çene yüz defektlerinin tedavisi, multidisipliner bir çalıĢmayı gerektirebilir. BaĢ boyun cerrahisi, rekonstruktif cerrahi, ortodonti ve protez bölümlerinin beraber çalıĢması tedavi baĢarısını arttırır.7 Cerrahi ile ABSTRACTMaxillofacial prosthetics are made in order to improve the integrity of the prosthetic deteriorated as a result of defects that occur for various reasons. They have characteristics of materials used in the construction of this prosthesis; aesthetics and durability significantly affect patient comfort. To ensure the success of maxillo-facial prostheses, in appropriate cases feature the prosthesis is possible with the use of materials. It mentioned in this compilation work done on the development of maxillofacial prosthesis, and today is explained by the characteristics of the advantages and disadvantages of materials used in maxillofacial prosthetics.

AraĢtırmamızda çeĢitli sebeplerle çıkarılması gereken sabit protetik restorasyonların baĢarısızlık nedenleri, kullanım süreleri, çıkarılma yöntemi ve son 6 ayda kiĢinin günlük hayatına nasıl etkilediğinin değerlendirilmesi amaçlanmıĢtır. Gereç ve Yöntem: AraĢtırma yaĢları 28-72 (47,6±10,1) arasında değiĢen 144 katılımcı (86 kadın; 58 erkek) üzerinde gerçekleĢtirildi. ÇalıĢmamızda 143(%99,3) tane metal destekli porselen restorasyon, 1 tane (%0,7) tam metal restorasyon değerlendirildi. Demografik veriler, sabit protetik restorasyonun söküm nedeni, Ante kural'ına uygunluğu, söküm yöntemi, üye sayısı, kullanım süresi, yapıldığı materyal, sökümünü isteyen bölüm ve hastaya yöneltilen Oral Sağlığın Günlük Hayata Etkisini Ölçen Ġndeks (OIDP) soruların cevapları araĢtırma formuna kaydedildi. Ġstatiksel değerlendirme için yüzdelikler ve Fisher-Freeman-Haltoon testleri kullanıldı. Bulgular: AraĢtırmada toplam 144 adet sabit protetik restorasyon değerlendirildi. Söküm nedenleri değerlendirildiğinde, destek diĢte ağrı (%38,2), periodontal dokularda sorun(%20,1) ve restorasyonun yenilenmesi(%15,3) en çok görülen ilk üç sebep olarak belirlendi. Gruplar arasında OIDP sorularının cevapları değerlendirildiğinde iĢ/çalıĢma yaĢamı ile psikolojik durum dıĢındaki değerlendirmeler açısından anlamlı bir farklılık bulunamadı. Sonuç: Sabit protetik restorasyonların çıkarılma sebepleri arasında destek diĢte ağrı en çok görülen sebeptir. Ante kuralını sağlayan ve sağlamayan restorasyonlar, görülen baĢarısızlık nedenleri açısından karĢılaĢtırıldığında arada anlamlı bir fark belirlenememiĢtir. Sabit protetik restorasyonlarda baĢarının değerlendirilmesinde Ante kuralı ile beraber hastaya bağlı faktörler, diĢin preparasyonu ve restorasyonun yenilenme sayısı gibi diğer faktörlerin de araĢtırılması gerekir. Anahtar Sözcükler: Oral Sağlığın Günlük Hayata Etkisini Ölçen Ġndeks, sabit protetik restorasyon, söküm yöntemi, Ante kuralı.