Examples of lamellar bone in the following topics:
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- The basic microscopic unit of bone is an osteon, which can be arranged into woven bone or lamellar bone.
- Osteons can be arranged into woven bone or lamellar bone.
- Woven bone is replaced by lamellar bone during development.
- Lamellar bone makes up the compact or cortical bone in the skeleton, such as the long bones of the legs and arms.
- When the same lamellar bone is loosely arranged, it is referred to as trabecular bone.
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- The next phase is the replacement of the hyaline cartilage and woven bone with lamellar bone.
- Substitution of the woven bone with lamellar bone precedes the substitution of the hyaline cartilage with lamellar bone.
- The lamellar bone begins forming soon after the collagen matrix of either tissue becomes mineralized.
- The osteoblasts form new lamellar bone upon the recently exposed surface of the mineralized matrix.
- This new lamellar bone is in the form of trabecular bone.
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- The next phase is the replacement of the hyaline cartilage and woven bone with lamellar bone.
- Substitution of the woven bone with lamellar bone precedes the substitution of the hyaline cartilage with lamellar bone.
- The lamellar bone begins forming soon after the collagen matrix of either tissue becomes mineralized.
- The osteoblasts form new lamellar bone upon the recently exposed surface of the mineralized matrix.
- This new lamellar bone is in the form of trabecular bone.
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- Paget's disease is a chronic bone disorder that causes affected bones to become large and misshapen.
- Paget's disease of bone is a chronic disorder that can result in enlarged and misshapen bones .
- The excessive breakdown and formation of bone tissue causes affected bone to weaken, resulting in pain, misshapen bones, fractures, and arthritis in the joints near the affected bones.
- This is associated with accelerated deposition of lamellar bone in a disorganized fashion.
- This intense cellular activity produces a chaotic picture of trabecular bone ("mosaic" pattern), rather than the normal linear lamellar pattern.
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- It is the process by which bone tissue is created.
- Eventually, woven bone is replaced by lamellar bone.
- The primary center of ossification is the area where bone growth occurs between the periosteum and the bone.
- It is also an essential process during the rudimentary formation of long bones, the growth of the length of long bones, and the natural healing of bone fractures.
- This serves as support for the new bone.
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- All the bones in the body can be described as long bones or flat bones.
- Bone is made of bone tissue, a type of dense connective
tissue.
- Cortical bone
is compact bone, while cancellous bone is trabecular and spongy bone.
- The outer shell of the long bone is compact bone, below which lies a deeper layer of cancellous bone (spongy bone), as shown in the following figure.
- These are flat bone, sutural bone, short bone, irregular, sesamoid bone, and long bone.
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- Bone is remodeled through the continual replacement of old bone tissue, as well as repaired when fractured.
- Bone remodeling is the replacement of old bone tissue by new bone tissue.
- It involves the processes of bone deposition or bone production done by osteoblasts and bone resorption done by osteoclasts, which break down old bone.
- Bone turnover rates, the rates at which old bone is replaced by new bone, are quite high, with five to seven percent of bone mass being recycled every week.
- Compact bone is added to create bone tissue that is similar to the original, unbroken bone.
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- Bone grafting is a surgical procedure that replaces missing bone in order to repair bone fractures.
- Bone grafting is a surgical procedure that replaces missing bone in order to repair bone fractures that are extremely complex, pose a significant health risk to the patient, or fail to heal properly .
- Bone grafts may be autologous (bone harvested from the patient's own body, often from the iliac crest), allograft (cadaveric bone usually obtained from a bone bank), or synthetic (often made of hydroxyapatite or other naturally-occurring and biocompatible substances) with similar mechanical properties to bone.
- Most bone grafts are expected to be reabsorbed and replaced as the natural bone heals over a few months' time.
- Bone grafting is also used to fuse joints to prevent movement, repair broken bones that have bone loss, and repair broken bone that has not yet healed.
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- Bone scans are a special type of nuclear scanning test that is often used to find bone cancer or bone inflammation.
- A bone scan is a nuclear scanning test to find certain abnormalities in bone that are triggering the bone's attempts to heal.
- A nuclear bone scan is a functional test, which means it measures an aspect of bone metabolism or bone remodeling .
- Nuclear bone scans are not to be confused with the completely different test often termed a "bone density scan," DEXA or DXA, which is a low exposure X-ray test measuring bone density to look for osteoporosis and other diseases where bones lose mass, without any bone re-building (osteoblastic) activity.
- The technique, therefore, is sensitive to fractures and bone reaction to infections and bone tumors, including tumor metastases to bones, because all these pathologies trigger bone osteoblast activity.
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- Bone remodeling or bone turnover is the process of resorption followed by replacement of bone and occurs throughout a person's life.
- Bone volume is determined by the rates of bone formation and bone resorption.
- Numerous bone-derived growth factors have been isolated and classified via bone cultures.
- Essentially, bone growth factors may act as potential determinants of local bone formation.
- Bone tissue is removed by osteoclasts, and then new bone tissue is formed by osteoblasts.