Periodontitis is a prevalent destructive gum disease, characterized by loss of tissues supporting the teeth. The two main forms, chronic and aggressive have not been assessed in Kinshasa, DR Congo. Aim: The aim of this study was to investigate the Prevalence and the pattern of chronic periodontitis (CP) and aggressive periodontitis (AP) in order to improve its management. Materials and Methods: A cross sectional study of 404 subjects attending the dental services of the four hospitals of Kinshasa city, from October 2013 to April 2014 was carried out. The plaque index (PlI), bleeding on probing (BOP), probing pocket depth (PPD) and frequency of tooth brushing (FTB) were the parameters assessed. The SPSS software version 20.0 was used. Results: Out of 404 patients examined, 322 (79.7%) had chronic periodontitis versus to 44 (10.9%) of aggressive periodontitis. The female was higher than males with a sex ratio of 1.49:1 and the age group between 20 and 29 was the most represented. PPP of ≥6 mm was found in 24.6%, 5 or 5.5 mm in 27.3% and PPP of 3.5 to 4.5 mm in 48.1% of patients with periodontitis. Significant difference was found between CP and AP according to age variable, p-value < 0.001. PlI for CP was 0.97 (SD ± 0.38) while that for AP was 0.90 (SD ± 0.43). No significant differences were found between PlI, p-value = 0.47; FTB (p = 0.055) and BOP of subjects with AP and those with CP (p = 0.105). Conclusion: The two main forms of periodontitis diseases are more prevalent in patients attending dental services in Kinshasa and affect male as well as female. Age remains an essential variable to distinguish between CP and AP.

Background: There is paucity of literature on the determination of the root canal length of Bantu subjects in dental professional practicing in Africa and Democratic Republic of Congo in particular. Aims: The aim of the present study was to determine the root canal length of teeth of Bantu patients extracts attending the Teaching Hospital of Kinshasa University. Methods and Material: Prospective cross-sectional study was carried out in the service of Conservative Dentistry. The patients suffering with pulpitis of permanent teeth which were selected for root canal treatment during the period of January 2014 to December 2016 were included. All patients whose main root canals were inaccessible, teeth carrying prosthesis, teeth with large coronal decay, teeth having periapical periodontitis, supernumerary teeth, wisdom and primary teeth were excluded. Results: The upper canines presented some significant longer canals compared to the lower canine (23.4 ± 2.3 mm and 21.6 ± 1.8 mm). Palatal canals of the first and second molar were respectively longer as compared to the superior teeth canals (21.5 ± 1 mm, 21.3 ± 2 mm). The distal canals of the first and second molar were the longest in the mandibular arch respectively measuring 20.7 ± 2.0 mm and 21.5 ± 1.7 mm. Conclusion: Data obtained from Bantu patients show slightly shorter roots compared to How to cite this paper:

IntroductionL'objectif de cette étude était d'analyser les caractéristiques épidémiologiques cliniques des fractures alvéolo-dentaires aux cliniques universitaires de Kinshasa/RDC.MéthodesÉtude transversale de 7 ans, réalisée dans le département d'odontostomatologie, service de stomatologie et de chirurgie maxillo-faciale/cliniques universitaires de Kinshasa de Janvier 2007 à Décembre 2014.RésultatsSur les 93 dossiers colligés, le sexe masculin était prédominant (66,7%) et l'âge le plus prévalent se situait entre 20 ans et 29 ans. Les causes les plus fréquentes ont été les agressions/rixes (52,7%) et la luxation dentaire a été le type des lésions la plus fréquente avec 52,7%. La RX retro-alvéolaire été réalisée dans 75,7%, et le blocage mono-maxillaire fut le type de traitement le plus réalisé (60,2%).ConclusionL'analyse de profil clinique des traumatismes alvéolo-dentaires aux cliniques universitaires de Kinshasa est celui d'un adulte jeune de sexe masculin, présentant des luxations dentaires des maxillaires dont les causes sont les agressions/rixes.