To present two cases of root fractures which have healed spontaneously without any treatment? This article describes two untreated horizontal root fracture of the maxillary incisors. The fractured teeth were without any sign or symptom, and tested as vital to thermal and electric pulp test. These fractures were discovered during a routine full-mouth radiographic examination.

Background The present study aimed at investigating the prevalence of Apical periodontitis in a Moroccan Adult subpopulation with a non-surgical root canal treatment and to assess associated risk factors including endodontic treatment quality, periodontal health status, coronal restoration cavity design and quality. Methods A total of 358 endodontically treated teeth were evaluated after more than 1-year period in a Moroccan subpopulation according to predetermined criteria. Studied parameters were assessed clinically and radiographically. The association between coronal restoration quality, cavity design, periodontal status, root canal filling quality, coronal restoration related features, presence or absence of the opposing dentition and the periapical status was determined. Data were analyzed using chi-square test, odds ratio and logistic regression. Results The present study revealed that gingival health, coronal restoration with CL II cavity design, and root canal filling quality influenced periapical status of endodontically treated teeth. Multivariate analysis showed that this association was statistically significant for gingival inflammation (95% CI 1.08–3.91, OR 2.05, p = 0.02), inadequate coronal restoration (95% CI 1.16–4.04, OR 2.16, p = 0.01), inadequate root canal filling length and homogeneity (95% CI 1.24–3.01, OR 1.93, P = 0.004), (95% CI 1.41–4.44, OR 2.50, p = 0.002) respectively. Conclusions The present study revealed that inadequate coronal restorations especially with large proximal margins (CL II cavity design) and gingival inflammation increased the risk of apical periodontitis in endodontically treated teeth. Prevalence of Apical periodontitis in the present study was 72.1%.

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The successful removal of a separated instrument from the root canal depends on various factors. The location of the broken fragment must be determined because that is commonly the most important factor in determining successful retrieval of the fragment. A variety of different methods for removing obstructions have been described in the literature. However, guidelines for the removal of a separated instrument have not been established. This review aims to describe the methodological approaches to adopt for removing an intracanal separated instrument, depending on the clinical situation, both when the fragment extends into the pulp chamber and two-thirds of the way down the root canal. CPD/Clinical Relevance: This paper aims to describe the methodological approaches to adopt for removing an intracanal separated instrument, depending on the clinical situation.

Objectives: The aims of this in vitro study was to investigate the effects of bleaching agents commonly used in micromorphology of the enamel surface and to assess the effect of concentration and of adding fluoride in the bleaching agents. Methods: Sixty freshly extracted intact teeth were stored in distilled water. One half of each tooth was served as control, the other part was treated with bleaching agent. Samples were randomly divided into six groups of ten, according to the bleaching agents: G1- at-home-CP10; G2- at-home-CP16; G3- at-home-CP22; G4- in-office-CP35; G5- in-office-HP40 with fluoride; G6- in-office-HP40 without fluoride. Enamel specimens for each group were then submitted to a quantitative scanning electron microscopy. Number of pores and their diameter were measured to assess porosity of enamel surface. Results: SEM analysis revealed enamel surface porosity after bleaching. Significant increase in number and major diameter of pores in bleached samples (p<0.001) were observed. The comparison between samples treated with 10% PC and samples treated with 22% PC showed significant increase in number of pores (p=0.006) and major diameter (p=0.001) from samples treated with 22% PC. Statistical analyses showed significant increase in the number of pores (p=0.006) from samples treated with 40% HP without fluoride compared to samples treated with 40% HP containing fluoride. Conclusions: Bleaching products with low concentration cause less porosity at surface of the enamel compared to concentrated products. Adding fluoride in the bleaching agent appears to reduce porosity of enamel surface.

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Introduction : la mise en forme canalaire est l’étape critique de la thérapeutique endodontique.  Des erreurs peropératoires tel : le faux canal, le stripping ; peuvent se manifester durant cette étape. L’instrumentation endodontique à base d’acier inoxydable est souvent à l’origine de ces erreurs à cause de la rigidité de l’alliage à base duquel elle est fabriquée.Pour pallier ce problème, l’instrumentation NiTi endodontique a été conçue puis employée afin de permettre un meilleur  respect de la trajectoire canalaire, grâce à la flexibilité de l’alliage NiTi.Matériel et méthodes : le présent travail avait pour objectif principal  l’évaluation du respect de la trajectoire canalaire par les instruments NiTi du système ProTaper®universal rotatif. Il s’agit d’une étude radiographique  rétrospective  qui a porté sur 241 canaux des molaires dont la mise en forme a été réalisée  par le  système ProTaper®universal  rotatif , dans   le service d’odontologie conservatrice au centre de consultations et de traitements dentaires ( CCTD) , CHIS, RABAT.Résultats :  -Nous avons relevé la survenue d’incidents peropératoires à des pourcentages variés :-3,3% de butée ; 2,1 % de faux canaux ; 5,4% de stripping, tandis que le zipping est survenu dans 1,7% des cas.-Nous avons  également  déterminé une relation entre le stripping  et un angle canalaire préopératoire serréConclusion : L’ensemble des résultats font suggérer la reproductibilité du système ProTaper®universal rotatif.

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