Impact de l'état de surface implantaire sur le risque de péri-implantite: revue systématique / Impact of implant surface characteristics on risk of peri-implantitis: a systematic review

INTRODUCTION: La mucosite et la péri-implantite sont des pathologies inflammatoires péri-implantaires d'origine infectieuse survenant autour d'implants en fonction. Les différences de conception des systèmes implantaires dans leurs caractéristiques chimiques de surface peuvent influer sur le risque potentiel de colonisation bactérienne de l'interface dent-implant .Même si plusieurs études animales suggèrent le rôle de l'état de surface dans le développement de la péri-implantite, les résultats restent contradictoires et difficilement reproductibles chez l'homme. L'objectif de cette étude était de déterminer à partir des preuves scientifiquement validées, l'impact des caractéristiques physico-chimiques de surface implantaire sur le risque de survenue d'une péri-implantite. MATÉRIELS ET MÉTHODES:Pour retrouver les articles pertinents , une stratégie de recherche couvrant la période allant du 01 Janvier 2004 au 10 Mai 2014 a été mise au point et appliquée aux bases de données MEDLINE, EMBASE, DENTISTRY & ORAL SCIENCES SOURCE et COCHRANE Library. Cette recherche électronique a été combinée à la recherche manuelle dans des revues spécialisées en parodontologie et en dentisterie implantaire. RÉSULTATS: 389 écrits sont retenus pour une inclusion dans l'étude, seuls 3 articles ont passé le filtre de l'analyse de la pertinence et des critères édictés a priori. Ces études réalisées entre 2004 et 2014 ont porté sur 705 implants posés sur 200 sujets. CONCLUSION: Les résultats ont montré que l'état de surface implantaire rugueuse ou lisse n'influence pas directement l'apparition des maladies péri-implantaires sauf en présence d'autres facteurs de risque de péri-implantite

Dental mobility is defined as an increase in the amount of movement of the dental crown under the effect of a defined force. This is a frequent reason for consultation for patients with periodontitis. This was a descriptive cross-sectional study that was carried out in the dentistry department of the Bamako Military Hospital over a period of 3 months (from January 15 to April 15, 2020). All patients who were consulted in the service and who agreed to participate in the study were included in this study. The mobility diagnosis was made using the Muhlemann index and a questionnaire was used for data collection. Dental mobility was present in 110 out of 750 patients, or 14.7%. Males represented 49%, age groups 46 and over accounted for 31.8% of cases. Pain was the most common reason for consultation with 47.3%. Muhlemann class 2 dental mobility represented the highest number with 54.6% of cases. Mobility affected more adults and women. These data illustrate the importance of implementing effective means of early management of periodontal diseases, in order to prevent the installation of disabling dental mobility for patients.

Stress analysis of a fixed implant-supported denture by the finite element method (FEM) when varying the number of teeth used as abutments

OBJECTIVES: In some clinical situations, dentists come across partially edentulous patients, and it might be necessary to connect teeth to implants. The aim of this study was to evaluate a metal-ceramic fixed tooth/implant-supported denture with a straight segment, located in the posterior region of the maxilla, when varying the number of teeth used as abutments. MATERIAL AND METHODS: A three-element fixed denture composed of one tooth and one implant (Model 1), and a four-element fixed denture composed of two teeth and one implant (Model 2) were modeled. A 100 N load was applied, distributed uniformly on the entire set, simulating functional mastication, for further analysis of the SEQV (Von Mises) principal stresses, which were compared with the flow limit of the materials. RESULTS: In a quantitative analysis, it may be observed that in the denture with one tooth, the maximum SEQV stress was 47.84 MPa, whereas for the denture with two teeth the maximum SEQV stress was 35.82 MPa, both located in the region between the pontic and the tooth. CONCLUSION: Lower stresses were observed in the denture with an additional tooth. Based on the flow limit of the materials, porcelain showed values below the limit of functional mastication.

Regeneración periodontal: ¿sí o no? / Periodontal regeneration: yes or no?

Se describe el caso clínico de un paciente de 45 años de edad con antecedentes de periodontitis aguda (localizada en el diente 21), bolsas periodontales de 3-8 mm, movilidad dentaria de grado IV y encía alterada con índice gingival de 2,5, que fue remitido a la Clínica Estomatológica Provincial Docente "Mártires del Moncada" en Santiago de Cuba. Se realizó tratamiento pulporradicular y ferulización de la pieza afectada, la técnica de colgajo periodontal. Transcurridos 6 meses se obtuvo una considerable disminución del índice gingival a 0,1, profundidad de 3 mm al sondeo y movilidad dentaria de grado I, con osteointegración positiva y regeneración periodontal demostrada radiográficamente.

The case report of a 45-year-old patient with a history of acute periodontitis (located in tooth 21), 3-8 mm periodontal pockets, IV grade dental mobility and gingival swelling with a gingival rate of 2,5 was described, who was referred to "Mártires del Moncada" Provincial Teaching School of Dentistry in Santiago de Cuba. Pulpar radicular treatment and splinting of the affected tooth, technique of periodontal flap were performed. After 6 months a significant reduction of gingival rate to 0,1, deep to 3 mm at probing and dental mobility of grade I were obtained, with positive osteointegration and periodontal regeneration radiographically viewed.