BACKGROUND The horns and frill of Triceratops and other ceratopsids (horned dinosaurs) are interpreted variously as display structures or as weapons against conspecifics and predators. Lesions (in the form of periosteal reactive bone, healing fractures, and alleged punctures) on Triceratops skulls have been used as anecdotal support of intraspecific combat similar to that in modern horned and a...

This study was conducted to evaluate the capacity of guiding bone regeneration of polyhydroxyethyl-polymethyl methacrylate (PHEMA-PMMA) membrane as a guided tissue regeneration membrane for bone defects. Two 8-mm diameter transosseous round defects were made at the parietal bone of 18 New Zealand White rabbits. Defects were covered with or without PHEMA-PMMA membrane. Radiological and histologi...

Transforming growth factor beta (TGF-beta) is produced by bone cells, is abundant in bone matrix, and regulates bone cell biochemical processes. In osteoblast-enriched fetal rat parietal bone cell cultures, low TGF-beta doses increase DNA synthesis, whereas higher levels are less mitogenic, stimulate collagen production, and decrease alkaline phosphatase activity. Parathyroid hormone by itself ...

The amount of new bone formed in collagen matrix with daidzein was compared to that formed in collagen matrix alone. Eighteen bone defects, 5mm by 10mm were created in parietal bone of 9 New Zealand white rabbits. In the experimental group, 6 defects were grafted with collagen matrix with daidzein. In the control groups, 6 defects were grafted with collagen matrix alone (positive control) and 6...

The present study aims to assess the effects of cigarette smoke inhalation and/or coffee consumption on bone formation and osseous integration of a dense hydroxyapatite (DHA) implant in rats. For this study, 20 male rats were divided into four groups (n = 5): CT (control) group, CE (coffee) group, CI (cigarette) group and CC (coffee + cigarette) group. During 16 weeks, animals in the CI group w...

Abstract Introduction With the advent of 3D printing in surgical training, producing realistic cranial bone models can benefit cranio-surgical training greatly. This includes measurements individual layers skull. Hence, we have done this systematic review to identify calvarial thickness measurement literature, if different modalities affect and human cadaveric samples differ. Method Our literat...

Unusually aggressive forms of cutaneous squamous cell carcinoma are being increasingly recognized as a complication of HIV infection. We report the case of a 59-year-old male patient with advanced HIV infection who presented with a highly aggressive SCC lesion over the scalp area with destruction of the underlying parietal bone and fulminant clinical progression.

Head injuries are the most serious injuries in the term of morbidity and mortality. This study was conducted in Government Medical College mortuary among the 200 post mortem cases of road traffic accident victims over the period of one year from 1st October 2014 to 30th September 2015. All the cases coming during the study period were included in the study. The objective is to find out pattern ...

Paget's disease of bone (PDB) is a very rare disease in the Asian countries including Japan, although as a bone metabolism disease it is relatively common in Europeans and Americans. An infrequent complication of PDB is the giant cell tumor (GCT). We encountered a case of GCT in the maxilla complicating PDB in a 57-year-old Japanese woman. She developed her first GCT in the right occipital bone...