information about how to manage the extraction socket with regenerative techniques (Barone et al, 2008). This will simplify and lead to more predictable placement of implants in the most ideal position (Cardaropoli, Araújo, Lindhe, 2003; Cardaropoli et al, 2005). The results of a recent study show that acellular dermal matrix (ADM), used as membrane associated with an inorganic bovine-derived h...

Chronic anterior shoulder instability due to structural failure of the subscapularis muscle and the anterior capsule is a rare and challenging diagnosis for surgeons to manage because poor-quality capsular, labral, and rotator cuff tissue often limits effective treatment options. If primary repair is not possible because of retraction and poor tissue quality, reconstruction with an allograft or...

Reduction of the original height and width of the alveolar bone of an edentulous site precludes optimal positioning of implant fixtures and may esthetically compromise the prosthesis. Ridge expansion at the time of extraction can prevent the need for ridge reduction and reduces the number of surgical interventions.A patient with a narrow ridge with buccal deformity was treated for the staged pl...

PURPOSE To evaluate several physical properties and physical dimensions of commercially available soft-tissue augmentation devices. METHODS After 2 x 5-cm strips of several graft materials were hydrated, load elongation, cyclic and permanent displacement, percent elastic displacement, tensile modulus, stiffness, and ultimate load-to-failure strength were determined. With a 5-N preload, 30 cyc...

Muscle herniations occur through acquired fascial defects in the lower extremities; upper-extremity are rare. The affected patients typically adult men engaging strenuous exercise or with injury; pediatric cases infrequent. We a patient symptomatic, forearm herniation treated defect closure using an acellular dermal allograft. This case report highlights not only presence of this rare condition...

BACKGROUND Acellular human dermal matrix grafts (Graftjacket; Wright Medical Technology, Arlington, TN, USA) are used clinically for rotator cuff augmentation without a detailed understanding of their biomechanical effects. The purpose of this study was to evaluate the effect of augmentation with dermal grafts on the biomechanical effects of rotator cuff repairs. METHODS Nine matched pairs of...

The use of novel devices such as acellular dermal matrices (ADMs) to support the lower pole in implant-based breast reconstructions (IBBRs) has been described as one of the most important advances in breast reconstructive surgery following mastectomy. However, the majority of outcomes studies focus primarily on providing evidence for the rates of short-term complications associated with their u...

Dirac matrices, also known as gamma matrices, are defined only up to a similarity transformation. Usually, some explicit representation of these matrices is assumed in order to deal with them. In this article, we show how it is possible to proceed without any such assumption. Various important identities involving Dirac matrices and spinors have been derived without assuming any representation ...