Dna2 is a nuclease/helicase with proposed roles in DNA replication, double-strand break repair and telomere maintenance. For each role Dna2 is proposed to process DNA substrates with a 50-flap. To date, however, Dna2 has not revealed a preference for binding or cleavage of flaps over single-stranded DNA. Using DNA binding competition assays we found that Dna2 has substrate structure specificity...

Achieving adequate coverage of soft tissue defects located on the lower third of the legs and feet is challenging for reconstructive surgeons. Fasciocutaneous flaps can be used to meet this challenge. Two common fasciocutaneous flaps used in this context are the reverse sural flap and lateral supramalleolar flap (LSMF). Plastic and reconstructive surgeons are relatively unfamiliar with the seco...

The design of circulation control (CC) dual radius flap systems were investigated to characterize the parameters that make up the flap surface to offer further knowledge into the CC field of study. Multiple dual radius flap geometries, along with variants, were developed by varying specific flap parameters from a baseline configuration that had previously developed. The aerodynamics of the diff...

The anatomy of the cervical and marginal mandibular branches of the facial nerve is reviewed. In the senior author's practice, "pseudoparalysis of the marginal mandibular nerve" due to cervical branch injury occurred in 34 of 2002 superficial musculoaponeurotic system-platysma face lifts (1.7 percent) and was associated with a full recovery in 100 percent of cases within a time period ranging f...

The external carotid artery and its branches were investigated in hens by an acrylic plastic injection method. The common carotid artery of hens bifurcated into the internal and external carotid arteries at the level of the second cervical vertebra. The external carotid artery advanced antero-superiorly within the platysma, stylohyoid, and occipitomandibular muscles at the postero-lateral side ...

The distal third of the tibia, ankle and heel area is difficult to reconstruct. For small to medium size defects, local flaps are often an easier alternative than free flap. In lower limb surgery, the sural flap is based on this principle and this flap is becoming increasingly popular. The distally based superficial sural artery flap, first described as a distally based neuro skin flap by masqu...

BACKGROUND The purpose of this study was to compare patient satisfaction following unilateral pedicled transverse rectus abdominis myocutaneous (TRAM) and free abdominal flap reconstruction. METHODS Patients who underwent unilateral breast reconstruction using pedicled TRAM or free abdominal flaps (muscle-sparing TRAM or deep inferior epigastric perforator flap) and completed the BREAST-Q wer...

BACKGROUND The purpose of this study was to determine the causes of head and neck free flap loss and to evaluate outcomes after subsequent microvascular and non-microvascular reconstruction. METHODS Patients who experienced free flap loss between 2000 and 2012 were reviewed. RESULTS There were 40 flap losses out of 3090 free flaps (1.3%). Twenty-eight patients underwent subsequent free flap...

approached with care, and either neovascularization across the flap should be confirmed or the main vascular pedicle should be left intact. We report a case of the total loss of a flap after a secondary operation was performed 18 months after successful reconstruction using a latissimus dorsi muscle flap. There is controversy concerning flap neovascularization, and many factors can compromise f...