Sleep bruxism, which heavily depends on self-report, is significantly associated with TMD. Unilateral chewing seems to be a common factor for development of SB and TMD. However, further studies are needed to corroborate this finding. Additionally, this study supports the hypothesis that occlusal factors are not related to self-reported sleep bruxism.

Objective: The aim of this study was to investigate the prevalence and types of hypercementosis and the frequency of possible etiological factors in a large sample of Turkish central Anatolian population. Subjects and Methods: A cross-sectional study was performed using panoramic radiographs of 1176 randomly selected adult patients with an age range of 18–96 years, who presented to the Department of Oral and Maxillofacial Radiology of the Faculty of Dentistry, Cumhuriyet University (Sivas, Turkey) for dental care. Patients were questioned about the presence of systemic diseases. Panoramic radiographs of the patients were examined for the presence and types of hypercementosis (diffuse, focal and shirt sleeve cuff) and the frequency of local factors that may be associated with hypercementosis. Chi-square and t-tests were used for statistical analysis. Results: Hypercementosis was detected in 128 of 1176 patients. In total, 85.6% of the teeth with hypercementosis had a diffuse, 7.5% had a focal, and 6.8% had a shirt sleeve cuff type. Hypercementosis was observed most frequently in the mandibular (P < 0.05) and the premolar region. Gender-related differences were nonsignificant (P > 0.05). Atherosclerosis, osteoporosis, and multiple diseases were reported more frequently in individuals with hypercementosed teeth (P < 0.05). While idiopathic origin (39.3%), bruxism (30%), and inflammation (24.37%) were the most prevalent local etiological factors, impacted teeth (1.25%) and history of trauma (0.62%) were less common. Conclusion: The prevalence of hypercementosis was 10.8% in the study population. The lesions were more common in the mandibule. Idiopathic origin was the most common factor associated with hypercementosis.

Hydrogen sulfide (HS) and other volatile sulfur compounds (VSCs) appear mainly in the oral air of patients with halitosis. It seems that VSCs are directly involved in the pathogenesis of gingival diseases. In previous studies, short-term (7 hours-4 days), high concentrations (5-400 ppm) of HS applications on periodontal tissues have been evaluated in a culture medium. The aim of the present study was to investigate the potential effects of lower (equivalent to halitosis) concentrations of HS on rat gingival tissue for longer-term inhalation. The threshold level of pathologic halitosis perceived by humans at 250 ppb of HS was converted to rat equivalent concentration (4.15 ppm). Rats in the experimental (HS) group (n=8) were exposed to HS continuously but not the control rats (n=8). After 50 days, the gingival sulcular tissue samples of each rat were taken and examined using transmission electron microscope. Ultrastructural changes in the sulcular epithelia of the rat gingiva showed deformation of celullar shape, vacuolization, and disintegrity of intercelullar connection by loss of desmosomes and collagen fibrils. No basal membrane damage was observed. Inhalation of low levels of HS (equivalent of halitosis) in the oral environment causes ultrastructural celullar damages in rat sulcular mucosa. These results suggest that halitosis may be the potential reason for periodontal destruction in humans.

It can be concluded that HS inhalation equivalent to pathologic halitosis producing level in humans may lead to systemic effects, particularly heart or liver damage in rats.

Bruxism is a repetitive jaw muscle activity characterized by grinding or clenching of the teeth and/or by bracing or thrusting of the mandible. There are two types of bruxism: one that occurs during sleep (sleep bruxism) and one during wakefulness (awake bruxism). 1 While there is no consensus on the exact cause of sleep bruxism (SB), current literature support the hypothesis that SB has a multifactorial etiopathogenesis which potentially involves disturbance of the dopaminergic system in the central nervous system, ÖZ Belli eğitim disiplinleri sigara alışkanlığı ve/veya muhtemel uyku bruksizminin gelişiminde bir risk faktörü müdür? Üniversite öğrencilerinde bir çalışma Amaç: Bu çalışmanın amacı farklı eğitim disiplinlerinde öğrenim gören üniversite öğrencilerinde, eğitimin sigara alışkanlığı ve muhtemel uyku bruksizmi eğilimine olan etkisini ve varsa sigara ve muhtemel uyku bruksizminin ilişkisini değerlendirmektir. Gereç ve Yöntemler: Çalışma, Cumhuriyet Üniversitesi Diş Hekimliği Fakültesi Ağız, Diş ve Çene Radyolojisi Anabilim Dalı'na 2012-2014 tarihleri arasında başvuran, 17-34 yaş aralığında 262'si kız (%57) ve 195'i erkek (%43) olmak üzere 457 üniversite öğrencisinin doldurduğu formlar üzerinden retrospektif olarak yürütüldü. Bu formlarda öğrencilerin sorulara verdikleri cevaplar kaydedildi. Bulguların istatistiksel değerlendirilmesi SPSS 20.0 programında ki-kare analizi kullanılarak yapıldı. Bulgular: Sigara alışkanlığı mühendislik bölümü öğrencilerinde ve erkeklerde anlamlı derecede yüksek bulundu (p<0.05). Sigara kullanan öğrencilerde muhtemel uyku bruksizmi görülme sıklığı yüksek olsa da bu fark anlamlı değildi (p>0.05). Cinsiyet ve eğitim disiplinlerinin muhtemel uyku bruksizmiyle arasında anlamlı bir ilişki yoktu (p>0.05). Sonuç: Eğitim disiplinlerinin sigara alışkanlığında etkisi bulunurken, muhtemel uyku bruksizmi üzerinde bu etki görülmemiştir.