What is the resorption lacunae?
resorption lacunae –> Howship’s lacunae. Tiny depressions, pits, or irregular grooves in bone that is being resorbed by osteoclasts. Synonym: resorption lacunae.
What happens during resorption of bone?
Resorption is the breakdown and assimilation of old bone in the cycle of bone growth. The process of resorption (remodeling) involves the removal of hard bone tissue by osteoclasts followed by the laying down of new bone cells by osteoblasts.
What causes resorption of bone?
Osteoclast cells cause bone resorption and originate from a hematopoietic lineage, which includes various blood cell types from within the bone marrow. The cellular process of the remodeling begins when osteoblast and osteoclast precursor cells fuse to form a multinucleated, osteoclastic cell.
What is the resorption of bone tissue called?
Destruction, or resorption, of bone by large cells called osteoclasts releases calcium into the bloodstream to meet the body’s metabolic needs and simultaneously allows the bone—which is inhibited by its inorganic component from growing by cell division like other tissues—to alter size and shape as it grows to adult …
What is lacunae Howship?
[ hou′shĭps ] n. Any of the tiny depressions, pits, or irregular grooves in bone that is being resorbed by osteoclasts.
Is cementum a bone?
Cementum is a bone-like mineralized tissue lining the dentin of the root that protects the root and also serves as an attachment surface to anchor the PDL to the tooth (Diekwisch, 2001).
What stimulates bone resorption?
Parathyroid hormone (PTH) stimulates bone resorption by acting directly on osteoblasts/stromal cells and then indirectly to increase differentiation and function of osteoclasts. PTH acting on osteoblasts/stromal cells increases collagenase gene transcription and synthesis.
What is a resorption?
Resorption is the term for a common type of dental injury or irritation that causes a loss of a part or parts of a tooth. Resorption can affect many parts of a tooth, including: interior pulp. cementum, which covers the root.
Is bone resorption bad?
This is a natural process that’s important for your health and wellbeing. But when resorption happens at a higher rate than it can be replaced, it can lead to a decrease in your bone mass and put you at higher risk for fractures and breakage. In your mouth, your jawbone is most likely to be affected by this phenomenon.
What does resorption mean?
Listen to pronunciation. (ree-SORP-shun) A process in which a substance, such as tissue, is lost by being destroyed and then absorbed by the body.
Where are Howship’s lacunae?
Location. In bone, osteoclasts are found in pits in the bone surface which are called resorption bays, or Howship’s lacunae.
What is root resorption?
Root resorption is the process in which the body breaks down and absorbs tissue surrounding a tooth. Although this is a rare phenomenon in adults, root resorption in children is natural and enables the roots of baby teeth to dissolve so that permanent teeth can serve as replacements.
What is a resorption lacuna?
resorption lacuna a pit or groove in developing bone that is undergoing resorption; frequently found to contain osteoclasts.
What are lacunae in osteology?
Howship lacunae – tiny depressions, pits, or irregular grooves in bone that are being resorbed by osteoclasts. Synonym(s): resorption lacunae.
What is a lacuna in anatomy?
lacuna (ləkoo´nə), n a term used in anatomic nomenclature to designate a small hollow cavity or pit. n an area (pit) of bone resorption, usually irregular in outline, and often containing osteoclasts.