* Each<unk>  in the body can be dislocated, however, there are common sites where most<unk> s occur. The following structures are the most common sites of<unk> s: * Dislocated shoulder * Shoulder<unk> s account for 45% of all<unk>  visits to the emergency room. Anterior shoulder<unk> , the most common type of shoulder<unk>  (96-98% of the time) occurs when the arm is in external rotation and abduction (away from the body) produces a force that displaces the humeral head anteriorly and downwardly. Vessel and nerve injuries during a shoulder<unk>  is rare, but can cause many impairments and requires a longer recovery process. There is a 39% average rate of recurrence of anterior shoulder<unk> , with age, sex, hyperlaxity and greater tuberosity fractures being the key risk factors. * Knee: Patellar<unk>  * Many different knee injuries can happen. Three percent of knee injuries are acute traumatic patellar<unk> s. Because<unk> s make the knee unstable, 15% of patellas will re-dislocate. * Patellar<unk> s occur when the knee is in full extension and sustains a trauma from the lateral to medial side. * Elbow: Posterior<unk> , 90% of all elbow<unk> s * Wrist: Lunate and Perilunate<unk>  most common * Finger: Interphalangeal (IP) or metacarpophalangeal (MCP)<unk> s * In the United States, men are most likely to sustain a finger<unk>  with an incidence rate of 17.8 per 100,000 person-years. Women have an incidence rate of 4.65 per 100,000 person-years. The average age group that sustain a finger<unk>  are between 15 and 19 years old. * Hip: Posterior and anterior<unk>  of hip * Anterior<unk> s are less common than posterior<unk> s. 10% of all<unk> s are anterior and this is broken down into superior and inferior types. Superior<unk> s account for 10% of all anterior<unk> s, and inferior<unk> s account for 90%. 16-40 year old males are more likely to receive<unk> s due to a car accident. When an individual receives a hip<unk> , there is an incidence rate of 95% that they will receive an injury to another part of their body as well. 46–84% of hip<unk> s occur secondary to traffic accidents, the remaining percentage is due based on falls, industrial accidents or sporting injury. * Foot and Ankle: * Lisfranc injury is a<unk>  or fracture-dislocation injury at the tarsometatarsal<unk> s * Subtalar<unk> , or talocalcaneonavicular<unk> , is a simultaneous<unk>  of the talar<unk> s at the talocalcaneal and talonavicular levels. Subtalar<unk> s without associated fractures represent about 1% of all traumatic injuries of the foot and 1-2 % of all<unk> s, and they are associated with high energy trauma. Early closed reduction is recommended, otherwise open reduction without further delay. * Total talar<unk>  is very rare and has very high rates of complications. * Ankle Sprains primarily occur as a result of tearing the ATFL (anterior talofibular ligament) in the Talocrural<unk> . The ATFL tears most easily when the foot is in plantarflexion and inversion. * Ankle<unk>  without fracture is rare.
Joint dislocation
Intraarticular fracture
Nonunion
Retrolisthesis
Malunion
Back strain
Pseudofracture
Bunion