Mechanisms of bone resorption: analysis of proinflammatory cytokines in peritoneal macrophages from titanium implant--an experimental design.

Cytokines, and interleukin-6 in particular, are inflammatory peptide mediators that are extensively studied as regulators of bone tissue homeostasis. They seem to be involved in osteoclast activation and bone resorption and probably play a role in osseointegrated implant rejection. In this study we investigate the ability of titanium implants to cause an imbalance in the homeostatic equilibrium of cytokines using the peritoneal cavity of DB-A2 mice as a model. The inflammatory response was evaluated as a messenger ribonucleic acid expression determined by the semiquantitative reverse transcriptase--polymerase chain reaction technique in peritoneal macrophages from titanium-implanted mice. Interleukin-6 release was detected by a specific quantitative enzyme-linked immunosorbent assay. Our results have shown that titanium implants do not significantly stimulate the proinflammatory cytokine system compared to the control group. The enzyme-linked immunosorbent assay test confirms, after a peak in secretion at day 1 compared with basal levels, a clear decrease in interleukin-6 at basal levels on following control at 6 and 9 days after implantation. The study of the interaction between implanted biomaterials and inflammatory mediators seems to be very promising. Perhaps a better understanding of the mechanisms of bone resorption could lead to finding a new clinical solution for patients with osseointegrated implant rejection.

[Plastic surgery of the abdominal wall in laparocele in a patient with previous kidney transplant]. / Plastica della parete addominale per laparocele in paziente con pregresso trapianto renale.

The authors report the case of a patient undergoing kidney transplant from a non-related but compatible living donor who subsequently developed a voluminous incisional hernia affecting almost the entire small intestine in the right iliac fossa, the site of earlier surgery. After having analysed the problems involved when a transplant patient requires further surgery owing to the chronic administration of drugs, the authors describe the case. The patient was treated using the insertion of a prolene graft and remodelling the abdominal wall in correspondence with the lower quadrants using abdominoplasty without repositioning the umbilicus.

[Plastic surgery by the Limberg-Dufourmentel method in the treatment of a pilonidal sinus. The anatomicosurgical considerations and an emblematic case]. / La plastica secondo Limberg-Dufourmentel nel trattamento del sinus pilonidalis. Considerazioni anatomo-chirurgiche e presentazione di un caso emblematico.

Limberg-Dufourmentel's cutaneous flap may be used to fill in the loss of residual substance after the radical excision of sinus pilonidalis in the sacrococcygeal region. According to the authors, this technique enables some aspects of the locoregional anatomic conformation typically linked to the onset of this pathology to be modified, as well as permitting more accurate radical surgery. By way of example, the authors report the case of a 20-year-old subject with sinus pilonidalis who was successfully treated using this surgical technique.

[Surgical treatment of rhinophyma using dermo-epidermal graft. A case report]. / Trattamento chirurgico del rinofima con innesto dermo-epidermico. Caso clinico.

Rhinophyma is a nosographical form that has always attracted attention, even among non-experts, owing to the marked aesthetic damage it often causes. Several types of surgery have been proposed for its treatment in an attempt to elaborate a technique that is easy to apply and guarantees satisfactory results in clinical and aesthetic terms. After a short review of the general aspects of the pathology, the authors illustrate the case of a patient with rhinophyma treated with a full thickness dermo-epidermic graft, and emphasise that this surgical solution, provided that the indications are correct, is still a valid alternative.

[The use of osteointegrated implants in plastic surgery. Ear reconstruction]. / L'impiego degli impianti osteointegrati in chirurgia plastica. Ricostruzione del padiglione auricolare.

The authors present the case of a 14-year-old patient suffering from first branchial arch syndrome with agenesia of the auricle in which the auricle was reconstructed using osteointegrated implants. The patient had previously undergone numerous attempts at reconstruction using traditional methods, all of which had failed. In order to ensure an accurate preoperative evaluation, the patient was studied using CT with a standard technique and three-dimensional image reconstruction for a qualitative and quantitative evaluation of bone thickness so as to allow the optimal positioning of fixtures. This test also revealed the existence and good degree of development of the middle and internal ear. The Authors then proceeded to implant 4 titanium fixtures into the mastoid process of the temporal bone, three of which were used for fixing the auricle prosthesis and one for the insertion of a bone anchored hearing aid. The epithesis, in soft silicon, was modelled to match the contralateral ear with excellent aesthetic results.

[Primary hydatid cyst of the coracobrachial muscle. A clinical case]. / Cisti da echinococco primaria del muscolo coracobrachiale. Caso clinico.

Primary localization of hydatidosis in the musculoskeletal system is a quite rare occurrence. We report a case of a 67 year old man with an infestation of the coracobrachialis muscle. We discuss several instrumental and serologic diagnosis methods and the hypothesis of a primary muscular localization.

[Obstruction of the Le Veen shunt: a new surgical solution]. / L'ostruzione dello shunt di Le Veen: nuova soluzione chirurgica.

The authors propose an alternative which has been proved valid in four cases of peritoneovenous shunt with an occluded Le Veen valve for venous thrombosis implanted in cirrhotic patients with refractory ascites. After having explored the various possibilities using the vessels adjacent to the superior cava branch, the authors resolved the problem of reimplanting the valve by using an access route through the saphenous vein and inferior vena cava. Using this technique it was possible to reactivate the shunt with a marked improvement in the recurrent ascitic state and above all shunt functionality, and consequently in the clinical conditions and quality of life of these patients.

[Comparison between the hemodynamic effects of nitroglycerine ointment and oral isosorbide dinitrate in the treatment of left ventricular failure (author's transl)]. / Effetti emodinamici della trinitroglicerina pomata e dell'isosorbide dinitrato per os a confronto nel trattamento dell'insufficienza ventricolare sinistra.

The hemodynamic effects of standard dose of Nitroglycerin (NTG) ointment (23 +/- 4 mg) and oral Isosorbide Dinitrate (ISDN) 10 mg were compared in the treatment of left ventricular failure. Ten patients, 8 males and 2 females (mean age 59 +/- 9 years), affected by acute myocardial infarction (7 cases). Ischemic cardiomyopathy (2 cases) and hypertensive cardiomyopathy (1 case) were submitted to right heart catheterization by triple lumen Swan-Ganz catheter. Heart Rate (HR), mean Arterial Pressure (AP), Right Atrial Pressure (RAP), mean Pulmonary Artery Pressure (PAP), Pulmonary Wedge Pressure (PWP), Stroke volume (SV), Cardiac Index (CI), Stroke Work Index (SWI), Systemic Vascular Resistances (SVR), Pulmonary Total Resistances (PTR) were controlled every 30 minutes until the disappearance of the hemodynamic effects. ISDN did not produce any statistically significant changes; on the contrary NTG ointment caused significant changes in: (formula: see text). Decrease of RAP, PAP, PWP, PTR and increase of SV, CI, SWI were statistically significant from 30 until 180 minutes after NTG ointment administration. These changes were statistically different from those produced by ISDN (p less than 0,05). Thus NTG ointment, at this dose, improved cardiac performance, while oral ISDN 10 mg did not. It is concluded that the hemodynamic effects of NTG ointment are prompt and sustained.