Morphology, Development and Deformation of the Spine in Mild and Moderate Scoliosis: Are Changes in the Spine Primary or Secondary?

Introduction and aim of the study: We aim to determine whether the changes in the spine in scoliogenesis of idiopathic scoliosis (IS), are primary/inherent or secondary. There is limited information on this issue in the literature. We studied the sagittal profile of the spine in IS using surface topography. Material and methods: After approval of the ethics committee of the hospital, we studied 45 children, 4 boys and 41 girls, with an average age of 12.5 years (range 7.5–16.4 years), referred to the scoliosis clinic by our school screening program. These children were divided in two groups: A and B. Group A included 17 children with IS, 15 girls and 2 boys. All of them had a trunk asymmetry, measured with a scoliometer, greater than or equal to 5 degrees. Group B, (control group) included 26 children, 15 girls and 11 boys, with no trunk asymmetry and scoliometer measurement less than 2 degrees. The height and weight of children were measured. The Prujis scoliometer was used in standing Adam test in the thoracic (T), thoraco-lumbar (TL) and lumbar (L) regions. All IS children had an ATR greater than or equal to 5 degrees. The Cobb angle was assessed in the postero-anterior radiographs in Group A. A posterior truncal surface topogram, using the “Formetric 4” apparatus, was also performed and the distance from the vertebra prominence (VP) to the apex of the kyphosis (KA), and similarly to the apex of the lumbar lordosis (LA) was calculated. The ratio of the distances (VP-KA) for (PV-LA) was calculated. The averages of the parameters were studied, and the correlation of the ratio of distances (VP-KA) to (VP-KA) with the scoliometer and Cobb angle measurements were assessed, respectively (Pearson corr. Coeff. r), in both groups and between them. Results: Regarding group A (IS), the average height was 1.55 m (range 1.37, 1.71), weight 47.76 kg (range 33, 65). The IS children had right (Rt) T or TL curves. The mean T Cobb angle was 24 degrees and 26 in L. In the same group, the kyphotic apex (KA (VPDM)) distance was −125.82 mm (range −26, −184) and the lordotic apex (LA (VPDM)) distance was −321.65 mm (range −237, −417). The correlations of the ratio of distances (KA (VPDM))/(LA (VPDM)) with the Major Curve Cobb angle measurement and scoliometer findings were non-statistically significant (Pearson r = 0.077, −0.211, p: 0.768, 0.416, respectively. Similarly, in the control group, KA (VPDM))/(LA (VPDM) was not significantly correlated with scoliometer findings (Pearson r = −0.016, −p: 0.939). Discussion and conclusions: The lateral profile of the spine was commonly considered to be a primary aetiological factor of IS due to the fact that the kyphotic thoracic apex in IS is located in a higher thoracic vertebra (more vertebrae are posteriorly inclined), thus creating conditions of greater rotational instability and therefore greater vulnerability for IS development. Our findings do not confirm this hypothesis, since the correlation of the (VP-KA) to (VP-KA) ratio with the truncal asymmetry, assessed with the scoliometer and Cobb angle measurements, is non-statistically significant, in both groups A and B. In addition, the aforementioned ratio did not differ significantly between the two groups in our sample (0.39 ± 0.11 vs. 0.44 ± 0.08, p: 0.134). It is clear that hypokyphosis is not a primary causal factor for the commencing, mild or moderate scoliotic curve, as published elsewhere. We consider that the small thoracic hypokyphosis in developing scoliosis adds to the view that the reduced kyphosis, facilitating the axial rotation, could be considered as a permissive factor rather than a causal one, in the pathogenesis of IS. This view is consistent with previously published views and it is obviously the result of gravity, growth and muscle tone.

Disinfection of the root canal system: what should the protocol be?

The presence of micro-organisms within the root canal system is the critical aetiological factor in peri-radicular periodontitis. During root canal treatment (RCT) it is imperative that this infection and other organic debris are removed from the root canal system. This is challenging because complex tooth anatomy, the presence of a biofilm and the smear layer complicate the process. There are a number of irrigant chemicals and adjunctive systems available in contemporary endodontic practice that are used to disinfect the root canal system during root canal preparation. This article reviews the available evidence concerning these disinfection methods and concludes by presenting a clinical protocol supported by the literature. CPD/Clinical Relevance: A clinical protocol, supported by the literature, is presented for effective decontamination of the root canal system during root canal therapy.

Is there an optimal method to detach Candida albicans biofilm from dental materials?

Introduction. Candida albicans can produce a complex, dynamic and resistant biofilm on the surface of dental materials, especially denture base acrylic resins and temporary soft liners. This biofilm is the main aetiological factor for denture stomatitis, an oral inflammatory condition characterized by chronic and diffuse erythema and oedema of the denture bearing mucosa. Gap Statement. There is no consensus in the literature regarding the best method to detach biofilms from dental materials. In order to assess the antifungal efficacy of new materials and treatments, the biofilm needs to be properly detached and quantified. Aim. This study compared different methods of detaching C. albicans biofilm from denture base acrylic resin (Vipi Cril) and temporary soft liner (Softone) specimens. Methodology. Specimens of each material were immersed in an inoculum of C. albicans SC5314 and remained for 90 min in orbital agitation at 75 r.p.m. and 37 °C. After the removal of non-adherent cells, the specimens were immersed in RPMI-1640 medium for 48 h. Biofilm formation was evaluated with confocal laser scanning microscopy (n=5). Then, other specimens (n=7) were fabricated, contaminated and immersed in 3 ml of sterile phosphate-buffered saline (PBS) and vortexed or sonicated for 1, 2, 5, or 10 min to detach the biofilm. The quantification of detached biofilm was performed by colony-forming unit (c.f.u.) ml−1 count. Results were submitted to one-way analysis of variance (ANOVA)/Tukey HSD test (α=0.05). Results. A mature and viable biofilm was observed on the surfaces of both materials. For both materials, there was no significant difference (P>0.05) among detachment methods. Conclusion. Any of the tested methods could be used to detach C. albicans biofilm from hard and soft acrylic materials.

Psychogenic non-epileptic seizures (PNES) in the context of concurrent epilepsy – making the right diagnosis

Epilepsy is a risk factor for the development of psychogenic non-epileptic seizures (PNES) and comorbid epilepsy is recognized as a comorbidity in about 10–30% of patients with PNES. The combination of epileptic and nonepileptic seizures poses a particular diagnostic challenge. In patients with epilepsy, additional PNES may be suspected on the basis of their typical semiology. The possibility of additional PNES should also be considered if seizures fail to respond to antiepileptic drug treatment, in patients with frequent emergency admissions with seizures and in those who develop new types of seizures. The description of semiological details by patients and witnesses can suggest additional PNES. Home video recordings can support an initial diagnosis, however, especially in patients with mixed seizure disorders it is advisable to seek further diagnostic confirmation by capturing all habitual seizure types with video-EEG. The clinical features of PNES associated with epilepsy are similar to those in isolated PNES disorders and include longer duration, fluctuating course, asynchronous movements, pelvic thrusting, side-to-side head or body movement, persistently closed eyes and mouth, ictal crying, recall of ictal experiences and absence of postictal confusion. PNES can also present as syncope-like episodes with unresponsiveness and reduced muscle tone. There is no unique epileptological or brain pathology profile putting patients with epilepsy at risk of additional PNES. However, patients with epilepsy and PNES typically have lower educational achievements and higher levels of psychiatric comorbidities than patients with epilepsy alone. Psychological trauma, including sexual abuse, appears to be a less relevant aetiological factor in patients with mixed seizure disorders than those with isolated PNES, and the gender imbalance (i.e. the greater prevalence in women) is less marked in patients with PNES and additional epilepsy than those with PNES alone. PNES sometimes develop after epilepsy surgery. A diagnosis of ‘known epilepsy’ should never be accepted without (at least brief) critical review. This narrative review summarises clinical, electrophysiological and historical features that can help identify patients with epilepsy and additional PNES.

#3113 Evaluating the PCL-C as a measure of trauma and PTSD symptoms in patients with functional neurological symptom disorder

AimsFunctional Neurological Symptom Disorder (FNSD) is common and disabling. Historically trauma was considered an essential aetiological factor, but the precise contribution of trauma to the disorder, and resulting disability, remains controversial. The PCL-C is a self-reported screening tool for PTSD symptoms based on DSM-IV criteria. A previous study in patients with FNSD demonstrated high scores on the PCL-C, with a reduction in scores following psychotherapy. However strong correlations with other psychological co-morbidities raised the possibility that the PCL-C may be capturing non-specific distress rather than indicators of previous traumatisation. The present study aimed to investigate (i) whether underlying factors measured by the PCL-C can distinguish specific trauma-memory-related symptoms from less specific emotion-regulation-related symptoms, (ii) the extent to which individual factors correlate with other psychopathology and health-related quality of life (HRQoL) measures and (iii) whether different factors change with psychotherapy, all in patients with FNSD.MethodsAn exploratory factor analysis of PCL-C responses from 473 FNSD patients pre-and post-psychotherapy was performed to generate1-4 factor models. The final factor model was determined through confirmatory factor analysis. Relationships between PCL-C factors, measures of comorbidities (depression, somatisation and anxiety) and HRQoL were assessed using regression analysis. Pre- and post-psychotherapy scores were compared.ResultsThe best model for the PCL-C comprised of two-factors: factor 1 (intrusive symptoms) explained 55.2% of the variance, whilst factor 2 (emotional dysregulation) explained 7.8% of the variance. Both factors reduced in severity after psychotherapy, but factor 2 reduced by more and correlated more strongly with a decrease in depression and anxiety than factor 1. Changes in depression, anxiety, somatic symptoms and mental HRQoL predicted 61.9% of the change in factor 2, but only 49.2% in factor 1. Improvements in mental HRQoL were strongly associated with a decrease in factor 2, but less so in factor 1.DiscussionThe factor analysis revealed the PCL-C represents two correlated but distinguishable symptom clusters in patients with FNSD: intrusive symptoms and emotional dysregulation. Both were elevated in our patient sample. The high level of intrusive symptoms suggests many patients with FNSD experience classical post-traumatic symptoms, which may indicate that subjective traumatic experiences contribute to pathogenesis and resulting disability. These symptoms showed some reduction with psychotherapy, but the greater reduction in emotional dysregulation symptoms and associated improvements in mental HRQoL suggest that psychotherapy may be more effective in reducing the burden of comorbidities and providing better coping strategies than in addressing core symptoms of the underlying disorder.

The impact of occlusal support on temporomandibular disorders: a literature review

Temporomandibular disorders are a multifactorial disease. Occlusal support and the number of teeth in dentition have significant effects on the masticatory system. The current study aims to review the role of occlusal support in association with findings of temporomandibular disorders. Data sources were PubMed, Web of Science and Google Scholar, with 1411 citations published over the period 1992–2019. The selection criteria stipulated that articles must have reported the association between the number of teeth, occlusal unit, occlusal support and temporomandibular disorders. A total of 15 full-text articles was finally accessed for eligibility in the current review. The studies on temporomandibular disorders were collected from various sources, including articles reporting temporomandibular disorder symptoms ( n=1), temporomandibular disorder signs ( n=5), temporomandibular joint osseous changes ( n=1), temporomandibular joint dysfunction using the Helkimo index ( n=2), and temporomandibular disorder classification ( n=6). Of these articles, significant associations were found between: the number of missing teeth and temporomandibular disorders ( n=5); the number of occlusal units and occlusal supports and temporomandibular disorders ( n=3); the position of the lost occlusal units and temporomandibular disorders ( n=1). Loss of the occlusal unit has more impact on temporomandibular disorders than the loss of posterior teeth. The total loss of unilateral occlusal support seems to be an aetiological factor for temporomandibular disorders, and maintenance of balanced posterior occlusal support has a role in the prevention and management of temporomandibular disorders.

Characteristics of patients with acute heart failure in North Central Nigeria

Objectives: Heart failure (HF) is an important cause of hospital admission in Nigeria. HF is increasingly prevalent because the population is aging and HF epidemiology is changing. We aimed at profiling the socio-demographic, clinical and echocardiographic (Echo) characteristics of patients admitted for acute HF. This is one of the largest cohorts of HF patients profiled in Nigeria so far. Methods: Cross sectional design. Socio-demographic, clinical and Echo data were collected from 455 patients admitted for AHF at University of Ilorin Teaching Hospital, North central, Nigeria. Results: Mean age of patients was 58.9± 15.7years, (men were older than women, P= 0.006). 265(58.2%) were males, most patients were aged >60 years, 4.8% had pre-existing Type2 Diabetes mellitus. 53.2% of patients presented in New York Heart Association Stages III and IV. Median duration of admission was 11days (IQR, 6-17), intrahospital mortality- 11.6%. Hypertension was the commonest aetiological factor (62.4%), followed by dilated cardiomyopathy 17.6%, rheumatic heart disease (6.6%), Peripartum cardiomyopathy (5.3%), and others. Conclusion: AHF patients in our study are older than those in previous studies in Nigeria and sub-Saharan Africa. Hypertension is main driver of AHF, and patients largely present with clinically advanced disease necessitating stronger public health education about risk factors and early presentation.

Necrotizing enterocolitis

Necrotizing enterocolitis is not a new disease but one that has been reported since special care units began to house preterm infants. It was observed in the foundling hospitals of Paris (Billard 1828) and Vienna (Bednar 1850) and, as it occurred in clusters, was regarded as a nosocomial infection in the infant hospitals of Zurich (Willi 1944) and Berlin (Ylppö 1931). Clinical and pathoanatomical characterization was achieved by Schmidt and Quaiser in 1952. The unproven hypothesis of mesenteric hypoperfusion as a major aetiological factor arose from animal models and analogous perforating disorders in term infants. Despite similarities between necrotizing enterocolitis and clostridial infections, few studies employed anaerobic culture techniques. The pathogenesis remains unclear and its distinction from related disorders uncertain. It is unlikely that strategies to prevent necrotizing enterocolitis will be successful unless the disease is better understood.

Obesity, oxidative DNA damage and vitamin D as predictors of genomic instability in children and adolescents

Background/objectives Epidemiological evidence indicates obesity in childhood and adolescence to be an independent risk factor for cancer and premature mortality in adulthood. Pathological implications from excess adiposity may begin early in life. Obesity is concurrent with a state of chronic inflammation, a well-known aetiological factor for DNA damage. In addition, obesity has been associated with micro-nutritional deficiencies. Vitamin D has attracted attention for its anti-inflammatory properties and role in genomic integrity and stability. The aim of this study was to determine a novel approach for predicting genomic instability via the combined assessment of adiposity, DNA damage, systemic inflammation, and vitamin D status. Subjects/methods We carried out a cross-sectional study with 132 participants, aged 10–18, recruited from schools and paediatric obesity clinics in London. Anthropometric assessments included BMI Z-score, waist and hip circumference, and body fat percentage via bioelectrical impedance. Inflammation and vitamin D levels in saliva were assessed by enzyme-linked immunosorbent assay. Oxidative DNA damage was determined via quantification of 8-hydroxy-2′-deoxyguanosine in urine. Exfoliated cells from the oral cavity were scored for genomic instability via the buccal cytome assay. Results As expected, comparisons between participants with obesity and normal range BMI showed significant differences in anthropometric measures (p < 0.001). Significant differences were also observed in some measures of genomic instability (p < 0.001). When examining relationships between variables for all participants, markers of adiposity positively correlated with acquired oxidative DNA damage (p < 0.01) and genomic instability (p < 0.001), and negatively correlated with vitamin D (p < 0.01). Multiple regression analyses identified obesity (p < 0.001), vitamin D (p < 0.001), and oxidative DNA damage (p < 0.05) as the three significant predictors of genomic instability. Conclusions Obesity, oxidative DNA damage, and vitamin D deficiency are significant predictors of genomic instability. Non-invasive biomonitoring and predictive modelling of genomic instability in young patients with obesity may contribute to the prioritisation and severity of clinical intervention measures.

Aetiology of febrile seizures – a problem not fully understood

Febrile seizures are seizures that occur during febrile illnesses in the absence of central nervous system infection or other identifiable aetiology in children who have never had any non-febrile seizures before. Although the condition is quite common, affecting 2–5% of children between 3 months and 5 years of age, the underlying pathomechanism is not fully explained. Immaturity of the nervous system, as well as environmental, genetic and immune factors are contemplated. Viruses are the main aetiological factor of febrile infections accompanied by seizures. The risk of febrile seizures after vaccination is low and may be associated with the child’s genetic predisposition. Deficiency of trace elements, including zinc and iron, may also promote seizures. The association between febrile seizures and vitamin D levels was reported in only few studies. It seems that genetic background plays an important role, at least in some cases. In recent years, particular attention has been paid to the possible involvement of immune factors, including pro- and anti-inflammatory cytokines. Previous studies on the aetiology of febrile seizures confirmed their multifactorial nature and indicated their heterogeneity within this group of patients. Further research may not only contribute to a better understanding of the mechanisms underlying the pathogenesis of febrile seizures, but also determine the direction of actions that may reduce the risk of their occurrence and/or recurrence.