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Introduction: Wisdom teeth extraction is a common procedure, generally considered as safe by patients. However, complications are possible, especially periodontal ones. The aim of this study was to evaluate the frequency and the consequences of periodontal complications at the level the 2nd molars after extraction of the wisdom teeth., Material and Methods: A single-center retrospective observational multi-operator study was conducted at the university hospital of Besançon - France. The files of all the adult patients who underwent extraction of four impacted wisdom teeth by mean of a standardized surgical technique between November 2012 and November 2014 and who could be followed 1 year postoperatively at least and that precisely mentioned the periodontal status of the surgical sites were included. Postoperative complications, gingival and plaque indexes according to Loë and Silness, periodontal attachment level and periodontal second molar probing were recorded. The main judgment criterion was the occurrence of a periodontal complication in the second molar areas., Results: The files of 20 patients (15 women - 5 men), operated on by five different surgeons, met the inclusion criteria. Two patients suffered from dry socket at one of the avulsion sites. No patient had a gingival or plaque index greater than 2. No gingival recession or periodontal pocket over 4mm was found., Discussion: Extraction of impacted third molars in young healthy adults didn't have any impact on the second molars periodontal environment in our study. Literature suggests that surgical technique greatly influences the occurrence and the extent of periodontal sequelae., (Copyright © 2017. Published by Elsevier Masson SAS.)

Alveolitis are infectious complications following the dental extraction. They appear under two forms: dry, characterized by a painful syndrome and uninhabited alveolus, and suppurative, which becomes identified by provoked pain and alveolus filled. Their etiopathogenesis remain a subject of interrogation because of the rarity of studies concerning this complication. Nevertheless, treatment is mainly favorable by a sedation of the pain and the startup of a physiological healing. From this article, we are going to review their clinical forms, their etiology as well as the followed treatment.

Following the removal of mandibular teeth, especially third molars nowadays, a post-operative complication may occur, namely alveolitis. This article reviews the pertinent literature concerning this condition and discusses its etiology, symptoms and treatment.

Although dry socket is a frequent and painful affection, its pathogenesis is still unknown. We present here a review of the literature to propose a logical preventive and therapeutic attitude. The clinical and histological aspects are also tackled.

In part I of this critical review of the literature on the risks and benefits of removing impacted third molars, we have dealt with: I--Risks of non-intervention. This second part is about: II--Risks of intervention, III--Benefits of non-intervention, and, finally, IV--Benefits of intervention.

This review of the literature presents the current data and controversies regarding the etiology and pathogenesis of dry socket. After presenting arguments which support the theory of clot non-formation and those supporting its malformation, the thesis of fibrinolysis is discussed along with its mechanisms and origins. Finally, the various factors which could encourage this pathology are reviewed and the therapeutic and preventive management are presented.