Mechanical pull-out test of a new hybrid fixture-abutment connection: an in vitro study

Implant abutment connection was described among the main causes of peri-implant bone resorption. The aim of this in vitro study was to test the coupling capacity, the surface modification of a new hybrid connection and the influence of repeated connection activations caused during the main clinical and laboratory phases. A total of 40 implant-abutment screw retained systems with 10 degrees-conical and internal hexagon connection were tested. The connection was screwed, fixed to the universal test machine, removed the screw and a pull-out test was performed. Test was repeated five times in succession. Also Scanning Electron Microscopy (SEM) was used to detect microscopically surface modification. Analysis of variance and Tukey tests were used for the statistical analysis. Pull-out test reveals a mean value of 131.35 +/- 16.52 Newton Centimeter (N center dot cm). For each single activation, results from first to fifth were: 113.9 +/- 13.02, 126.1 +/- 12.81, 138.11 +/- 15.15, 138.8 +/- 11.90 and 140 +/- 12.99 N center dot cm. A statistically significant difference between the measurements and an increase in the removal force was shown. The collected data supports the use of this new type of connection, resulting in a very strong interface between implant and abutment. Also, repeated activation of connection can promote a better coupling of the implant-abutment interface

Expansion of the alveolar bone crest with ultrasonic surgery device: clinical study in mandible.

The purpose of this paper was to document the application to the split-crest mandibular procedure in two stage in order to avoid cortical resorption due to periosteal detachment in buccal cortical bone of the alveolar crest. Twenty-two healthy patients with non-contributory past medical history (14 women and 8 men, all non-smokers, mean age 59 years, range 54–65 years) were included in this study. After buccal mucoperiosteal flap was followed by a sagittal corticotomy in the coronal area of the alveolar crest and a second sagittal corticotomy, but in a lower (basal) position and two vertical corticotomies in the buccal wall, using a ultrasonic surgery device (Surgysonic, Esacrom, Imola Italy). Adequate crest expansion was achieved without compromising cortical vascularisation by utilising a combination of scalpel, thin chisels and threaded osteotomes (Bone System, Milano, Italy). Postoperative results were assessed by panoramic and periapical radiographs. Ossification of the osteotomy lines was evident and could be observed as sites with increasing radiopacity on panoramic and periapical radiographs 3 months after implants insertion. No dehiscence of the mucosa was observed. No patient suffered from hypoaesthesia. The mean horizontal bone increase in coronal area was 5±3 mm. Mandibular ridge expansion using a split-crest technique that included grafting the implant sites with a ultrasonic surgery device is a viable therapeutic alternative for implant placement in this patient population

Lipomi intestinali peduncolati intraluminali: una rara causa di subocclusioni intestinali transitorie

Describe the main CT and MRI findings of intraluminal pedicled intestinal lipomas (LIPI)

Intrabiliary rupture of hepatic hydatid cyst: MRI findings

The hydatid cyst is a parasitic disease mainly caused by Echinococcus granulosus. One of the most frequent complications of hepatic hydatid disease is rupture of cysts into the bile ducts, but only a few case reports to our knowledge described MRCP observations of biliary rupture. We expose the main MRI imaging findings of intrabiliary rupture of hepatic hydatid cyst

Multiplanar and Multiparametric MR Enterography in Crohn's disease

To optimize small-bowel MR protocols; to describe the most important findings in Crohn's disease (CD)

Cecal trap: CT findings of isolated cecal necrosis

Isolated cecal necrosis is a rare entity with high mortality. There are not many cases described in radiology literature; we want to explain the main CT findings to recognize this condition

Splenic Graulomatosis

We expose the principal imaging characteristics of splenic granulomatosis, in order to interpret the findings correctly, reaching whenever possible the appropriate diagnosi

Lithiasis and Spontaneous Hemobilia

Bleeding into the biliary tree or hemobilia is a rare cause for upper gastro-intestinal bleeding that was first described by Francis Glison in 1654. Most commonly hemobilia is the result of trauma or investigatory interventions but inflammation, vascular malformation, malignancy, coagulopathy, gallstones with inflammation, rupture of aneurysms, arteriosclerosis, varicose veins with portal hypertension were also described as potential causes of hemobilia

Elderly dysphagia: our 10-year experience in Presbyesophagus and Primary Presbyphagia.

To perform a retrospective evaluation of patients with primary presbyphagia, not related to other comorbidities, who undergone videofluoroscopy swallow study (VFSS) over a period of 10 years (2004-2013). To assess presbyesophagus incidence, prevalence and associated abnormalities of oral and pharyngeal swallowing in patients over 67 years old