Bone and Bones
Hip Dislocation, Congenital
Range of Motion, Articular
Accuracy of acetabular cup positioning using imageless navigation. (1/8)(+info)
Three dimensional-CT evaluation of femoral neck anteversion, acetabular anteversion and combined anteversion in unilateral DDH in an early walking age group. (2/8)(+info)
The association between Femoral Tilt and impingement-free range-of-motion in total hip arthroplasty. (3/8)(+info)
A new method of measuring acetabular cup anteversion on simulated radiographs. (4/8)(+info)
Validation of the femoral anteversion measurement method used in imageless navigation. (5/8)(+info)
Is there any relationship between Q-angle and lower extremity malalignment? (6/8)OBJECTIVE: The aim of this study was to assess the relationship between Q-angle and lower extremity alignment in women with unilateral patellofemoral pain syndrome (PFPS). METHODS: Eighty-five women with unilateral patellofemoral pain participated in the study, with each subject acting as their own internal control using the unaffected limb. Lower extremity alignment and Q-angles of the affected and unaffected knees were compared. RESULTS: There was a significant difference in the Q-angle between the affected (19.61+/-4.35) and the unaffected (17.63+/-4.29) side (p=0.00). There was also a significant difference in the lateral distal femoral angle (LDFA) (81.00+/-2.58 vs. 81.83+/-3.03; p=0.03) and no significant difference in the medial proximal tibial angle (MPTA) (87.88+/-2.63 vs. 87.60+/-3.29; p=0.51) between the affected and the unaffected side. There was no relationship between the Q-angle and LDFA (r=0.001, p=0.99), and MPTA (r=-0.051, p=0.64) in the affected side of the patients. There was also no relationship between the Q-angle and LDFA (r=0.179, p=0.64), and MPTA (r=-0.146, p=0.18) in the unaffected side of the patients. CONCLUSION: Increased Q-angle and decreased LDFA may be associated with PFPS although cause or effect cannot be established. There was no relationship between the Q-angle and lower extremity malalignment. Large prospective longitudinal studies are needed to detect changes in the femoral anteversion and toe-in gait and to establish if these features are a cause of PFPS. (+info)
Evaluation of the accuracy of femoral component orientation by the CT-based fluoro-matched navigation system. (7/8)(+info)
Using the transverse acetabular ligament as a landmark for acetabular anteversion: an intra-operative measurement. (8/8)PURPOSE. To measure the transverse acetabular ligament (TAL) anteversion in hips with severe deformity, using fluoroscopy-computed tomographic navigation. METHODS. 31 hips in 10 men and 19 women aged 40 to 78 (mean, 58.7) years who underwent total hip arthroplasty for primary osteoarthritis (n=6) or osteoarthritis secondary to developmental hip dysplasia (n=19) or congenital hip dislocation (n=6) were included. The severity of hip dislocation was classified according to the Crowe classification; 15 hips were grade 1, 7 were grade 2, 3 were grade 3, and 6 were grade 4. The TAL anteversion was measured using fluoroscopy-computed tomographic navigation. The difference in TAL anteversion between non-dislocated hips (Crowe grade 1, n=15) and dislocated hips (Crowe grades 2-4, n=16) was compared. RESULTS. In all 31 hips, the TAL could be visualised intra-operatively. No patient reported severe pain, early wear, loosening, or dislocation after 2 years. The mean TAL anteversion and inclination angles measured by the navigation system were 26.5 (SD, 8.9; range, 8-42) degrees and 41.5 (SD, 4.6; range, 32-49) degrees, respectively. 22 of the 31 hips were in the safe zone. TAL anteversion in non-dislocated and dislocated hips was not significantly different. Inter- and intra-observer mean absolute differences in TAL anteversion were 0.3 and 0.4 degree, respectively. CONCLUSION. The TAL is a useful anatomic landmark for total hip arthroplasty in dislocated hips. (+info)
In the medical field, bone anteversion is often used to describe the alignment of the bones in the hip joint. The hip joint is a ball-and-socket joint that connects the femur (thigh bone) to the pelvis. In a normal hip joint, the femur is rotated backward so that the head of the femur (the top of the bone) is facing slightly behind the body of the pelvis. This alignment allows for smooth movement of the leg in the frontal plane.
In contrast, when the bones of the pelvis and femur are rotated forward, the leg is positioned more internally than normal, which can lead to abnormal movement patterns and potentially cause pain or discomfort. Bone anteversion can be diagnosed through imaging tests such as X-rays or CT scans, and can be treated with physical therapy, bracing, or surgery depending on the severity of the condition.
In addition to its use in describing hip alignment, bone anteversion can also refer to rotation of other bones in the body, such as the elbow or knee joints.
1. Dislocation of the femoral head: This occurs when the ball-shaped head of the femur (thigh bone) is forced out of the socket of the pelvis.
2. Dislocation of the acetabulum: This occurs when the cup-shaped socket of the pelvis is forced out of its normal position.
Hip dislocation can cause severe pain, swelling, and difficulty moving the affected leg. Treatment options for hip dislocation vary depending on the severity of the condition and may include:
1. Reduction: This involves manually putting the bones back into their proper position.
2. Surgery: This may be necessary to repair or replace damaged tissues or bones.
3. Physical therapy: This can help improve mobility and strength in the affected limb.
4. Medications: These may be prescribed to manage pain, inflammation, and other symptoms.
Early diagnosis and treatment of hip dislocation are essential to prevent long-term complications and improve outcomes for patients.
Types of torsion abnormalities include:
1. Ovarian torsion: This is a condition where the ovary twists around its own axis, cutting off blood supply to the ovary. It can cause severe pain and is a medical emergency.
2. Testicular torsion: Similar to ovarian torsion, this is a condition where the testicle twists, cutting off blood supply to the testicle. It can also cause severe pain and is an emergency situation.
3. Intestinal torsion: This is a condition where the intestine twists, leading to bowel obstruction and potentially life-threatening complications.
4. Twisting of the spleen or liver: These are rare conditions where the spleen or liver twists, causing various symptoms such as pain and difficulty breathing.
Symptoms of torsion abnormalities can include:
1. Severe pain in the affected area
2. Swelling and redness
3. Difficulty breathing (in severe cases)
4. Nausea and vomiting
5. Abdominal tenderness
Treatment of torsion abnormalities usually involves surgery to release or repair the twisted structure and restore blood flow. In some cases, emergency surgery may be necessary to prevent serious complications such as loss of the affected organ or tissue. Prompt medical attention is essential to prevent long-term damage and improve outcomes.
The hip joint is a ball-and-socket joint that connects the thigh bone (femur) to the pelvis. In a healthy hip joint, the smooth cartilage on the ends of the bones allows for easy movement and reduced friction. However, when the cartilage wears down due to age or injury, the bones can rub together, causing pain and stiffness.
Hip OA is a common condition that affects millions of people worldwide. It is more common in older adults, but it can also occur in younger people due to injuries or genetic factors. Women are more likely to develop hip OA than men, especially after the age of 50.
The symptoms of hip OA can vary, but they may include:
* Pain or stiffness in the groin or hip area
* Limited mobility or range of motion in the hip joint
* Cracking or grinding sounds when moving the hip joint
* Pain or discomfort when walking, standing, or engaging in other activities
If left untreated, hip OA can lead to further joint damage and disability. However, there are several treatment options available, including medications, physical therapy, and surgery, that can help manage the symptoms and slow down the progression of the disease.
There are several factors that can contribute to bone resorption, including:
1. Hormonal changes: Hormones such as parathyroid hormone (PTH) and calcitonin can regulate bone resorption. Imbalances in these hormones can lead to excessive bone resorption.
2. Aging: As we age, our bones undergo remodeling more frequently, leading to increased bone resorption.
3. Nutrient deficiencies: Deficiencies in calcium, vitamin D, and other nutrients can impair bone health and lead to excessive bone resorption.
4. Inflammation: Chronic inflammation can increase bone resorption, leading to bone loss and weakening.
5. Genetics: Some genetic disorders can affect bone metabolism and lead to abnormal bone resorption.
6. Medications: Certain medications, such as glucocorticoids and anticonvulsants, can increase bone resorption.
7. Diseases: Conditions such as osteoporosis, Paget's disease of bone, and bone cancer can lead to abnormal bone resorption.
Bone resorption can be diagnosed through a range of tests, including:
1. Bone mineral density (BMD) testing: This test measures the density of bone in specific areas of the body. Low BMD can indicate bone loss and excessive bone resorption.
2. X-rays and imaging studies: These tests can help identify abnormal bone growth or other signs of bone resorption.
3. Blood tests: Blood tests can measure levels of certain hormones and nutrients that are involved in bone metabolism.
4. Bone biopsy: A bone biopsy can provide a direct view of the bone tissue and help diagnose conditions such as Paget's disease or bone cancer.
Treatment for bone resorption depends on the underlying cause and may include:
1. Medications: Bisphosphonates, hormone therapy, and other medications can help slow or stop bone resorption.
2. Diet and exercise: A healthy diet rich in calcium and vitamin D, along with regular exercise, can help maintain strong bones.
3. Physical therapy: In some cases, physical therapy may be recommended to improve bone strength and mobility.
4. Surgery: In severe cases of bone resorption, surgery may be necessary to repair or replace damaged bone tissue.