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Association Between Lumbar Muscle Atrophy Sagittal Pelvic Alignment and Stenosis Grade in Patients With Degenerative Lumbar Spinal Stenosis

This study is to evaluate the correlation between muscle atrophy (MA), sagittal alignment, and stenosis degree in patients with lumbar spinal Stenosis (LSS). From existing radiological images, specific radiographic parameters will be extracted.

Reconstruction of Atrophic Maxillary Ridges Using Mandibular Blocks With and Without Coverage Using Collagen Membrane

Is the use of collagen membrane on top of particulate bone mixture covered by onlay bone block in Maxilla better than the use of mixture of particulate bone covered by onlay bone block without the use of collagen membrane, in terms of bone quality and bone quantity?

Comparison of Two Pre-prosthetic Surgical Techniques for Augmentation of Mandibular Vertical Ridge Defects

The aim of this study is to compare two pre-prosthetic surgical techniques for augmentation of vertical mandibular ridge defects in preparation for implant placement, the first using customized ceramic membranes and the second using tenting titanium screws in conjunction with particulate bone graft and collagen membrane (modified sausage technique).