Nicola Piolanti

Distally based peroneus brevis muscle flap in reconstructive surgery of the lower leg: Postoperative ankle function and stability evaluation

BACKGROUND Defects of the distal third of the lower leg with exposed tendons or bone require either local or free flap coverage. Several flaps have been developed, and the distally pedicled peroneus brevis muscle flap has been proven to be a valid local flap alternative. PATIENTS AND METHODS Peroneus brevis muscle is dissected from the lateral surface of the fibula from proximal to distal, but no further than approximately 3-6 cm proximally to the lateral malleolus, where the most distal vascular pedicle from the peroneal artery enters the muscle consistently. This allows the muscle to be transposed to more distal lesions. The muscle is then covered with meshed split-skin graft. Between 2002 and 2008, 10 patients with defects of the lower leg in the distal lower third have been treated using this muscle flap. The defects were located over the Achilles tendon, the medial and lateral malleolar, the anterior region of the ankle and the heel area. Each patient was examined through assigning clinical demerit points according to a modified Weber scale, and through Olerud-Molander ankle score to analyse postoperative ankle stability and functionality after reverse peroneus brevis flap reconstruction of the defect. RESULTS All flaps survived completely, and no secondary local flap was required. In our experience, no complication or patient discomfort was noted. Donor-site morbidity was acceptable and restricted to the scar in the lateral lower leg. As demonstrated by the two score evaluations, the functions of foot eversion and plantar flexion as well as ankle functionality and stability were maintained due to preservation of peroneus longus muscle. CONCLUSION The reverse peroneus muscle flap is ideally suited for small-to-moderate defects of the distal third of the lower leg. This flap offers a convincing alternative for covering defects in the distal leg region. Its arc of rotation allows coverage of more anterior defects of the ankle, of defects of the Achilles tendon and of the heel area as well as of lateral and medial malleolus areas. It is simple to raise and is often transposed easily within the wound without further dissection. As long as the peroneus longus is preserved, ankle instability is not expected.

Acromio-clavicular repair using two different techniques.

Acromio-clavicular joint (ACJ) injuries represent nearly half of all athletic shoulder injuries. Stability of this joint depends on the integrity of the acromio-clavicular and coracoclavicular ligaments. Although the traumatic acromioclavicular joint separation is a well-known topic, there are different classifications, diagnostic procedures, concepts of intervention, and a great variety of implants. In this paper, we present an overview of the recent literature about this issue and the results of a retrospective non-randomized study with 2 different techniques. At the first Orthopedic Department of University of Pisa, a retrospective study was performed starting from January 2007 to February 2011 in our electronic database. We selected patient treated with two different techniques (tight-rope® system and hook plate) by the same senior surgeon with experience in shoulder surgery. The mean Costant score was 90 for the tight-rope® system group and 75 for the hook plate group. At the final follow-up, most of the patients had returned to their preinjury level of activity. Two patients had a breakage of the fixating system. The above-mentioned techniques provided satisfactory results with no loss of reduction except in two cases. The use of the hook plate is useful in fracture-dislocation of ACJ, but this requires another surgery to remove it. On the contrary, the use of the tight-rope® system does not require a new surgery or use of expensive synthetic graft or a graft harvested from a distant donor site.

Effect of vitamin D in fracture healing in a child: case report.

SummaryIn this report, we describe the effect of vitamin D and calcium supplementation on fracture healing in a young boy with a hypovitaminosis D who had a radius refracture. The radiographic evaluation of the callus formation shows a clear effect of vitamin D on fracture healing in absence of additional variables.IntroductionFracture healing restores the tissue to its original physical and mechanical properties and it involves a complex multistep process that involves response to injury, intramembranous bone formation, chondrogenesis, endochondral bone formation, and bone remodeling. All this process is influenced by a variety of systemic and local factors. It is generally assumed that vitamin D plays an intimate role in healing fractures; however, very little data exists on how it does.Case ReportIn this report, the authors describe the effect of vitamin D and calcium supplementation on fracture healing in a young boy with a hypovitaminosis D who had a radius refracture.ConclusionsOur case report suggests that the hypovitaminosis D is a possible cause of inadequate fracture healing and refracture in children and it shows a clear effect of vitamin D supplementation on callus formation in the absence of additional variables.

Nanoparticles for Tendon Healing and Regeneration: Literature Review

Tendon injuries are commonly met in the emergency department. Unfortunately, tendon tissue has limited regeneration potential and usually the consequent formation of scar tissue causes inferior mechanical properties. Nanoparticles could be used in different way to improve tendon healing and regeneration, ranging from scaffolds manufacturing (increasing the strength and endurance or anti-adhesions, anti-microbial, and anti-inflammatory properties) to gene therapy. This paper aims to summarize the most relevant studies showing the potential application of nanoparticles for tendon tissue regeneration.

Comparison of the POSSUM score and P-POSSUM score in patients with femoral neck fracture.

AbstractPurposeThe ageing of the population in developed countries has led to an increased number of patients with hip fractures all over the world. POSSUM and P-POSSUM scores predict morbidity and mortality of patients who will be undergoing a surgical treatment. The aim of this study was to evaluate accuracy of these two scores in hip-fractured patients.Materials and methodsBetween January and December 2012, in our department 144 patients were hospitalised for femoral neck fractures according to the grade III or IV of Garden’s classification treated with total hip arthroplasty or endoprosthesis. POSSUM scores and P-POSSUM scores were calculated for each patient with complete clinical data. We then calculated the observed and the expected ratio.Results134 patients were eligible: 110 females and 24 males. The mean age for women was 79 years, and the mean age for men was 84 years. We observed 13 deaths and 66 complications. The POSSUM scores predicted 16 deaths and 60 complications, while P-POSSUM scores predicted 6 deaths. The O/E ratio for POSSUM mortality was 0.81 and for P-POSSUM was 2.17, while POSSUM morbidity was 1.1.ConclusionIn our study, we have shown that on the one hand, the POSSUM score predicted accurately both the mortality and morbidity in patients undergoing surgery for the femoral neck fracture, while on the other hand, the P-POSSUM score underestimated them. For this reason, we believe that the POSSUM is indeed a good audit tool, which can accurately predict both mortality and morbidity in a cohort of patients.

Biomechanics of Interspinous Devices

A number of interspinous devices (ISD) have been introduced in the lumbar spine implant market. Unfortunately, the use of these devices often is not associated with real comprehension of their biomechanical role. The aim of this paper is to review the biomechanical studies about interspinous devices available in the literature to allow the reader a better comprehension of the effects of these devices on the treated segment and on the adjacent segments of the spine. For this reason, our analysis will be limited to the interspinous devices that have biomechanical studies published in the literature.

Clinical and Radiological Results over the Medium Term of Isolated Acetabular Revision

Acetabular cup loosening is associated with pain, reduced function, and instability of the implant. If such event happens while the femoral implant is in a satisfactory position and is well fixed to the bone, isolated acetabular revision surgery is indicated. The aim of this single-center retrospective study was to evaluate the clinical and radiological results over the medium term (12-month follow-up mean 36, max 60) of isolated acetabular revisions surgery using a porous hemispheric revision shell matched with a cemented all-poly cup and large diameter femoral head (>32). 33 patients were enrolled. We collect any relevant data from the clinical board. Routine clinical and radiographic examinations were performed preoperatively; the postoperative follow-up was made at 1, 3, and 6 months and yearly thereafter. At the last available follow-up, we report satisfactory improvement of functional scores in all the patients; 2 patients (6.1%) showed thigh pain and only 4 hips (12.11%) presented mild groin pain; all the femoral components are well fixed and there were no potential or pending rerevisions. With bias due to the follow-up and to the retrospective design of the study, we report clinical, functional, and radiological satisfactory results.

A Microsoft HoloLens Mixed Reality Surgical Simulator for Patient-Specific Hip Arthroplasty Training.

Surgical simulation can offer novice surgeons an opportunity to practice skills outside the operating theatre in a safe controlled environment. According to literature evidence, nowadays there are very few training simulators available for Hip Arthroplasty (HA).

The Fight Against the Slime: Can We Ever Win?

Microorganisms universally attach to surface and produce extracellular matrix of polysaccharidic nature termed slime. This phenomenon is now regularly referred to as biofilm formation. Biofilm-associated infections pose a serious problem for public health because bacteria growing in a biofilm are more recalcitrant to the action of antibiotics and host defenses than cells growing in a planktonic state. In orthopedic surgery, such proprieties of biofilm made prosthesis-associated infection a devastating complication. In such a “war,” the prevention with adequate pharmacological prophylaxis, pathogen-specific treatment, and the combination antimicrobial regimens are of paramount importance.