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Third-degree tear: fourchette, perineal skin, vaginal mucosa, muscles, and anal sphincter are torn; third-degree tears may be further subdivided into three subcategories: [6] 3a: partial tear of the external anal sphincter involving less than 50% thickness; 3b: greater than 50% tear of the external anal sphincter; 3c: internal sphincter is torn
The knee joint contains two crescent-shaped fibrocartilaginous structures, the menisci (medial and lateral), which serve as shock absorbers and stabilize the joint during movement. Each meniscus has an outer vascular zone (red-red zone), which has a good blood supply and healing potential as well as a central avascular zone (white-white zone ...
Knee effusion, informally known as water on the knee, occurs when excess synovial fluid accumulates in or around the knee joint. It has many common causes, including arthritis , injury to the ligaments or meniscus , or fluid collecting in the bursa , a condition known as prepatellar bursitis .
As with any body part, maintaining strength and flexibility of the muscles can help to prevent injuries. Specifically in the knee, the quadriceps and hamstring muscles help to stabilize the knee, and maintaining their strength and flexibility will help prevent minor stresses from developing into major injuries.
Medial knee injuries (those to the inside of the knee) are the most common type of knee injury. [1] The medial ligament complex of the knee consists of: [2] superficial medial collateral ligament (sMCL), also called the medial collateral ligament (MCL) or tibial collateral ligament; deep medial collateral ligament (dMCL), or mid-third medial ...
Grade 3 sprains occur when the ligament is completely torn into two pieces, and the knee joint is no longer stable. This is the most common type of ACL injury. [citation needed] Around half of ACL injuries occur in conjunction with injury to other structures in the knee, including the other ligaments, menisci, or cartilage on the surface of the ...
Biceps femoris muscle Biceps femoris tendon rupture can occur when the biceps femoris is injured in sports that require explosive bending of the knee as seen in sprinting . If the athlete is fatigued or has not warmed up properly he/she may suffer a hamstring strain/rupture, which is the tearing of the hamstring muscle.
The tendon can be surgically repaired. Afterwards a brace is given that prevents flexion of the knee. Athletes who have had this injury generally return to action in about 9 months to a year. [citation needed]