Intradiploic epidermoid cysts - a series of three cases and our experience with literature data.

Intracranial epidermoid cysts are rare, representing almost 1% of all primary tumors and when are located in the diploe result from entrapped ectodermal embryonic remnants. Because of frequent complications, imaging studies are mandatory for highlighting erosions of both outer and inner table of the calvaria and treatment preparation. We enlisted three female patients within our study, comparing imaging with histopathology aspects. Even though the bone destruction was evident, no atypia or malignant signs were highlighted in serial sections. The interesting fact that we present is that our patients are all females, opposed to what is written in literature. Although the positive diagnosis can be made by imaging, histopathological examination of these cysts is mandatory for identifying malignant behavior.

Multiple and giant coronary artery aneurysm - case report and a review of the literature.

We report an unusual case of a 70-year-old female patient admitted in the Department of Cardiology, Emergency County Hospital, Oradea, Romania, for unstable angina and heart failure. Coronary angiography and computed tomography revealed multiple coronary artery aneurysms, some of them giant, associated with significant coronary artery disease. Coronary artery aneurysm is a rare disease, but the frequency of diagnostic increased with the development of coronary angiography. However, very rarely coronary artery aneurysm is very large and can be termed "giant aneurysm", and a small number of reports have been described in literature. The management and the prognosis of the disease is still controversial.

Unusual occurrence of avascular necrosis with bilateral involvement and ankylosing spondylitis, meningioma and Hodgkin lymphoma.

This case report aimed to reveal the multidisciplinary aspect and discuss an association of disorders in a complex case with Hodgkin disease, meningioma, avascular necrosis with bilateral involvement and ankylosing spondylitis. We report the case of a 47-year-old patient, diagnosed with Hodgkin lymphoma at the age of 14. Two decades later, she was diagnosed with frontal chordoid meningioma, which was surgically removed, without radiotherapy. She was re-operated 10 years later for recurrence of meningioma. At the age of 39, she was diagnosed with bilateral avascular necrosis of the humeral head, femoral head and scaphoid bones. In the same year, she was also diagnosed with ankylosing spondylitis. We considered that the occurrence of rare chordoid meningioma, avascular necrosis with multiple locations and bilateral involvement in a patient with a malignancy during childhood and an autoimmune disease was unusual and there may be some common pathways.

Osseointegration of zirconium dental implants three months after insertion in rabbit femur. Histopathological study.

Implantology is a highly researched field with a constant concern in finding and studying new implant materials. Lately, zirconium has become a very attractive alternative to the detriment of titanium, but the research results were sometimes contradictory. Thus, we considered as opportune to study the osseointegration of zirconium dental implants in rabbit femur, three months after insertion. The biological material was represented by five rabbits and the experimental protocol was approved by the Ethics Committee of the University of Oradea, Romania. The implants (zirconium ceramic dental implants: 5 mm length, 2.6 mm diameter) were inserted in the femur under controlled conditions, after creating a bone defect. The animals received the appropriate postoperative care. Three months later, the implantation area was harvested and processed for histological examination. The assessment of the osseointegration process of the zirconium implants showed that they were very well tolerated by the host organism that did not trigger any rejection processes. Approximately 80% of the compromised bone was replaced with newly formed bone in advanced stages of remodeling and consolidation. The proliferated bone near the implants acquired a structure similar to the rabbit diaphyseal bone, but with higher density and size of the osteons. The stage reached by the osseointegration process three months after the insertion of the implants, ensures a good consolidation of the implants that supports the prosthetic structures, which are to be built on them.

The effect of plasma rich in growth factors in bone augmentation after sinus lift complications: a case report.

The case report describes a sinus membrane elevation procedure, where the augmentation was performed exclusively with plasma rich in growth factors (PRGF) and fibrin clot, followed by osseous regeneration at eight months. The patient exhibited a marked osseous atrophy in the premolar-molar area of the left superior alveolar process. Initially, we performed a sinus membrane elevation, with autologous bone on the sinus floor and bovine bone, followed by horizontal augmentation with autologous bone harvested from the mandibular ramus. The fragments were covered with PRGF and fibrin clot. Implants were inserted six months post-intervention, but due to the insertion high speed, a vestibular abscess occurred three months later. The implants and sinus graft were removed; after curettage, the sinus was filled with PRGF and fibrin clot. Eight months later, we observed the bone regeneration and the implants were reinserted. Along with implant insertion, bone was harvested for histological examination. Microscopically, the bone formation was revealed in the sinus, with differences between crestal and apical zones. The bone remodeling process was more advanced in the crestal zone compared with the apical zone. Bone regeneration was complete, and the bone density allowed the implant insertion with appropriate primary stability. Four months after implant insertion, the panoramic radiography and cone-beam computed tomography (CBCT) confirmed the implant osseointegration. Results obtained after using PRGF and fibrin clot alone as osseous addition materials in sinus lifting are highly promising, but in order to draw scientifically reasoned conclusions, further clinical studies are required.