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To understand the role of stress in the occurrence of noncarious cervical lesions. Preventive measures may be instituted if the causative factors are detected and their modifying factors are considered. Clinical SignificanceBackground: The last two decades have provided a plethora of new studies concerning noncarious cervical lesions. Most significant studies are reviewed and integrated into a practical approach to the understanding and designation of abrasion, abfraction and erosion.

Aim: This study proposes to describe the epidemiological, clinical and radiographic characteristics of Chronic Apical Periodontitis (CAP) in a population of patients attending Conservative Dentistry clinic of Odontology Department of University Cheikh Anta Diop of Dakar. Methodology: This was an observational, descriptive, cross-sectional clinical study. Cases were included after clinical and radiographic diagnosis of a CAP. The data collection was done form the following headings: (i) epidemiological data on socio-demographic characteristics (ii) the clinical data (ie reason of consultation, type of tooth, degree of mobility, integrity of periodontal attachment (periodontal probing), and the presence or absence of swelling or fistula); and (iii) radiographic data on ligament thickening and periapical status. Results: 51 cases of chronic apical periodontitis were included in the study. The results showed male predominance (68.6%) with a mean age of 31.1 years +/-12,1. Clinical symptoms regarding tooth mobility, loss of periodontal attachment, and swelling were timid or even inconsistent. The an tero-superior sector was the most concerned, with a strong presence of the 5 and 4 peri apical index (PAI) scores with respective percentages of 45.1% and 31.4%. Conclusion:During the study, it should be noted that PAC are more common in men and have modest clinical signs; which shows that their diagnosis is mainly radiographic.

The prevalence of teeth carriers of periodontitis apical is universally high. Only the decontamination of the root canal system through cleaning, it's shaping and its waterproof filling can ensure the eradication of infection at the level of the peri apex. The purpose of this prospective study was to establish the semiological profile of different types of periodontitis apical. The different characteristics used are subjective signs reported by the patient about the pain but also the clinical and radiographic features of each tooth with apical periodontitis. Material and Methods:The data were collected with an investigation form to identify the patient and meet the different clinical elements. All patients presenting to the clinic of ODE and having one or more teeth with the diagnosis of apical periodontitis was made were included in the study. A survey sheet crafted based on the modified Stephan model with the following headings namely: identification of the patient, the elements intra and extra oral, different etiologies, clinical and radiological diagnosis, recommended treatments.Results: One hundred and six (106) teeth were diagnosed among 85 patients. The predominants signs were the absence of pain and the presence of apical radio translucency associated with swelling. In 60.3% of the cases the etiology was caries with pain during consultation in 56.6% of cases. The maxillary sector was the most affected (39.6%) and the apical periodontitis chronic was the type of pathology the most met (40.5%). Conclusion:This retrospective study will enable practitioners to have a better diagnostic approach and therapeutic of apical periodontitis.This study will allow practitioners to dispose of diagnostic criteria and provide the most appropriate therapeutics to each type of apical periodontitis encountered.The software Sphinx² Copyright 1986-2003 has been used for data input and analysis. The test of chi2 was used to study the association between the predefined variables.