The regeneration of periodontal tissues still remains a challenge in periodontology. The aim of the present study was to examine the regenerative potential of a) different collagen support versus blank, b) different collagen support +/- a growth factor cocktail (GF) and c) a collagen powder versus collagen powder + periodontal ligament stem cells (PDLSCs) comparatively in a large animal model. ...

abstract : a 28-year old patient was referred for endodontic treatment of his left mandibular second molar. the patient had no history of systemic diseases and his chief complaint was spontaneous pain in left posterior region of mandible. clinically, there was a deep caries in the left mandibular second molar. radiographic examination of this tooth revealed a long crown containing large pulp ch...

Periodontal diseases are infectious diseases with a mixed microbial aetiology and marked inflammatory response leading to destruction of underlying tissue. Periodontal therapy aims to eliminate pathogens associated with the disease and attain periodontal health. Periodontitis is generally treated by nonsurgical mechanical debridement and regular periodontal maintenance care. Periodontal surgery...

The pathways for the spread of bacteria between pulpal and periodontal tissues have been discussed with controversy. Treatment and prognosis of endodontic–periodontal diseases vary and depend on the cause and the correct diagnosis of each specific condition. One treatment modality in such cases involves separation of two roots in the furcation area with selected removal of one root. This decisi...

In this paper we investigate the impact of delayed tax revenues on the fiscal policy outcomes. Choosing the delay as a bi-furcation parameter we study the direction and the stability of the bifurcating periodic solutions. With respect to the delay we show when the system is stable. Some numerical examples are finally given for justifying the theoretical results.

In two-parameter systems two symmetry breaking bi-furcation points of diierent types coalesce generically within one point. This causes secondary bifurcation points to exist. The aim of this paper is to understand this phenomenon with group theory and the innerconnectivity of irreducible representations of super-group and subgroups. Colored pictures of examples are included.

Compromised teeth often pose a significant challenge to the clinician, complicating the treatment plan and compromising long term prognosis. Upper molar teeth showing periodontal attachment loss, caries or fractures involving the furcation area are prime examples of such challenges. Treatment option for affected teeth can be roughly divided into maintenance of the tooth through root resection t...