骨痂是什么 骨痂形成時間

骨(gu)痂(jia)(jia)是形成(cheng)于骨(gu)修復處的(de)復合組(zu)織。它在骨(gu)折后可呈現(xian)持續(xu)性(xing)和漸進性(xing)的(de)組(zu)織類型轉變，血腫-肉芽組(zu)織-鈣(gai)化(hua)(hua)組(zu)織-編制(zhi)新生骨(gu)-，直(zhi)到恢(hui)復其(qi)原有的(de)剛度(du)。骨(gu)痂(jia)(jia)形成(cheng)是活骨(gu)刺(ci)激(ji)的(de)反應，包(bao)括化(hua)(hua)學(xue)性(xing)、感染性(xing)、力學(xue)不穩(wen)(wen)定(ding)等的(de)反應，骨(gu)痂(jia)(jia)是固定(ding)不穩(wen)(wen)定(ding)的(de)征象(xiang)。

骨(gu)(gu)(gu)(gu)(gu)折(zhe)愈(yu)合(he)過程(cheng)中的(de)(de)原始(shi)骨(gu)(gu)(gu)(gu)(gu)痂(jia)形成(cheng)(cheng)期，在(zai)骨(gu)(gu)(gu)(gu)(gu)折(zhe)端內、外形成(cheng)(cheng)骨(gu)(gu)(gu)(gu)(gu)組(zu)織(zhi)逐漸(jian)骨(gu)(gu)(gu)(gu)(gu)化，形成(cheng)(cheng)新(xin)骨(gu)(gu)(gu)(gu)(gu)，稱為(wei)膜內化骨(gu)(gu)(gu)(gu)(gu)。外面逐漸(jian)向骨(gu)(gu)(gu)(gu)(gu)折(zhe)端生長，彼此會(hui)合(he)形成(cheng)(cheng)梭形，稱為(wei)內骨(gu)(gu)(gu)(gu)(gu)痂(jia)和外骨(gu)(gu)(gu)(gu)(gu)痂(jia)。骨(gu)(gu)(gu)(gu)(gu)折(zhe)斷端及(ji)髓腔內的(de)(de)纖(xian)維組(zu)織(zhi)亦(yi)逐漸(jian)轉化為(wei)軟(ruan)(ruan)骨(gu)(gu)(gu)(gu)(gu)組(zu)織(zhi)，并(bing)隨軟(ruan)(ruan)骨(gu)(gu)(gu)(gu)(gu)細胞的(de)(de)增生、鈣化而骨(gu)(gu)(gu)(gu)(gu)化，稱為(wei)軟(ruan)(ruan)骨(gu)(gu)(gu)(gu)(gu)內化骨(gu)(gu)(gu)(gu)(gu)，而在(zai)骨(gu)(gu)(gu)(gu)(gu)折(zhe)處形成(cheng)(cheng)環狀骨(gu)(gu)(gu)(gu)(gu)痂(jia)和髓腔內骨(gu)(gu)(gu)(gu)(gu)痂(jia)。兩部分(fen)骨(gu)(gu)(gu)(gu)(gu)痂(jia)會(hui)合(he)后，這(zhe)些(xie)原始(shi)骨(gu)(gu)(gu)(gu)(gu)痂(jia)不斷鈣化而逐漸(jian)加強(qiang)，當(dang)其達到(dao)足以抵抗(kang)肌(ji)收(shou)縮及(ji)成(cheng)(cheng)角、剪(jian)力(li)和旋轉力(li)時，則骨(gu)(gu)(gu)(gu)(gu)折(zhe)已(yi)達到(dao)臨床愈(yu)合(he)，一般約需 4 - 8 周。