Bisphosphonates are a class of drugs used as the mainstay of treatment for osteoporosis.Bisphosphonates function by binding to hydroxyapatite,and subsequently targeting osteoclasts by altering their ability to resorb ...Bisphosphonates are a class of drugs used as the mainstay of treatment for osteoporosis.Bisphosphonates function by binding to hydroxyapatite,and subsequently targeting osteoclasts by altering their ability to resorb and remodel bone.Whilst aiming to reduce the risk of fragility fractures,bisphosphonates have been associated with atypical insufficiency fractures,specifically in the femur.Atypical femoral fractures occur distal to the lesser trochanter,until the supracondylar flare.There are a number of the differing clinical and radiological features between atypical femoral fractures and osteoporotic femoral fractures,indicating that there is a distinct difference in the respective underlying pathophysiology.At the point of presentation of an atypical femoral fracture,bisphosphonate should be discontinued.This is due to the proposed inhibition of osteoclasts and apoptosis,resulting in impaired callus healing.Conservative management consists primarily of cessation of bisphosphonate therapy and partial weightbearing activity.Nutritional deficiencies should be investigated and appro-priately corrected,most notably dietary calcium and vitamin D.Currently there is no established treatment guidelines for either complete or incomplete fractures.There is agreement in the literature that nonoperative management of bisphosphonate-associated femoral fractures conveys poor outcomes.Currently,the favoured methods of surgical fixation are cephalomedullary nailing and plate fixation.Newer techniques advocate the use of both modalities as it gives the plate advantage of best reducing the fracture and compressing the lateral cortex,with the support of the intramedullary nail to stabilise an atypical fracture with increased ability to load-share,and a reduced bending moment across the fracture site.The evidence suggests that cephalomedullary nailing of the fracture has lower revision rates.However,it is important to appreciate that the anatomical location and patient factors may not always allow for this.Although causation between bisphosphonates and atypical fractures is yet to be demonstrated,there is a growing evidence base to suggest a higher incidence to atypical femoral fractures in patients who take bisphosphonates.As we encounter a growing comorbid elderly population,the prevalence of this fracture-type will likely increase.Therefore,it is imperative clinicians continue to be attentive of atypical femoral fractures and treat them effectively.展开更多
Objective：To study the surgical treatment for distal humeral fractures in adults according to the follow-up results.Methods： Twenty-one cases （16 males and 5 females）of distal humeral fracture were included in thi...Objective：To study the surgical treatment for distal humeral fractures in adults according to the follow-up results.Methods： Twenty-one cases （16 males and 5 females）of distal humeral fracture were included in this study. The average age was 42.5 years （range： 37-52 years）. Fractures were classified according to the AO classification system.Nine cases of C1,8 C2 and 4 C3-type fractures were identified.Open reduction and internal fixation were performed in all cases. A tricep-reflecting approach was adopted, and either the AO orthogonal plating or parallel plating technique was chosen,based on the fracture type. The plaster cast was removed 3 weeks after operation. Rehabilitation was encouraged during this period and afterwards. The average follow-up time was 12.2 months （range： 8-28 months）. The outcome was scored according to Aitken and Rorabeek system.Results：No nerve injury,nonunion or failure of fixation was encountered during the operation and follow-up.However, ossifying myosifis occurred in one case.Conclusions：A triceps-reflecting approach can provide adequate exposure to the joint. The use of AO orthogohal plating or parallel plating techniques based on the type of fractures can provide rigid fixation for the fracture.展开更多
文摘Bisphosphonates are a class of drugs used as the mainstay of treatment for osteoporosis.Bisphosphonates function by binding to hydroxyapatite,and subsequently targeting osteoclasts by altering their ability to resorb and remodel bone.Whilst aiming to reduce the risk of fragility fractures,bisphosphonates have been associated with atypical insufficiency fractures,specifically in the femur.Atypical femoral fractures occur distal to the lesser trochanter,until the supracondylar flare.There are a number of the differing clinical and radiological features between atypical femoral fractures and osteoporotic femoral fractures,indicating that there is a distinct difference in the respective underlying pathophysiology.At the point of presentation of an atypical femoral fracture,bisphosphonate should be discontinued.This is due to the proposed inhibition of osteoclasts and apoptosis,resulting in impaired callus healing.Conservative management consists primarily of cessation of bisphosphonate therapy and partial weightbearing activity.Nutritional deficiencies should be investigated and appro-priately corrected,most notably dietary calcium and vitamin D.Currently there is no established treatment guidelines for either complete or incomplete fractures.There is agreement in the literature that nonoperative management of bisphosphonate-associated femoral fractures conveys poor outcomes.Currently,the favoured methods of surgical fixation are cephalomedullary nailing and plate fixation.Newer techniques advocate the use of both modalities as it gives the plate advantage of best reducing the fracture and compressing the lateral cortex,with the support of the intramedullary nail to stabilise an atypical fracture with increased ability to load-share,and a reduced bending moment across the fracture site.The evidence suggests that cephalomedullary nailing of the fracture has lower revision rates.However,it is important to appreciate that the anatomical location and patient factors may not always allow for this.Although causation between bisphosphonates and atypical fractures is yet to be demonstrated,there is a growing evidence base to suggest a higher incidence to atypical femoral fractures in patients who take bisphosphonates.As we encounter a growing comorbid elderly population,the prevalence of this fracture-type will likely increase.Therefore,it is imperative clinicians continue to be attentive of atypical femoral fractures and treat them effectively.
文摘Objective：To study the surgical treatment for distal humeral fractures in adults according to the follow-up results.Methods： Twenty-one cases （16 males and 5 females）of distal humeral fracture were included in this study. The average age was 42.5 years （range： 37-52 years）. Fractures were classified according to the AO classification system.Nine cases of C1,8 C2 and 4 C3-type fractures were identified.Open reduction and internal fixation were performed in all cases. A tricep-reflecting approach was adopted, and either the AO orthogonal plating or parallel plating technique was chosen,based on the fracture type. The plaster cast was removed 3 weeks after operation. Rehabilitation was encouraged during this period and afterwards. The average follow-up time was 12.2 months （range： 8-28 months）. The outcome was scored according to Aitken and Rorabeek system.Results：No nerve injury,nonunion or failure of fixation was encountered during the operation and follow-up.However, ossifying myosifis occurred in one case.Conclusions：A triceps-reflecting approach can provide adequate exposure to the joint. The use of AO orthogohal plating or parallel plating techniques based on the type of fractures can provide rigid fixation for the fracture.
