骨痂是什么 骨痂形成時間
骨痂是形(xing)成(cheng)于骨修復處的(de)(de)(de)復合(he)組織。它在骨折(zhe)后可呈(cheng)現持(chi)續性和漸(jian)進性的(de)(de)(de)組織類型轉變,血腫-肉(rou)芽組織-鈣化組織-編制新生骨-,直到(dao)恢(hui)復其原有的(de)(de)(de)剛度。骨痂形(xing)成(cheng)是活骨刺激(ji)的(de)(de)(de)反應(ying),包括化學性、感(gan)染性、力學不穩(wen)定(ding)等(deng)的(de)(de)(de)反應(ying),骨痂是固定(ding)不穩(wen)定(ding)的(de)(de)(de)征象。
骨(gu)(gu)(gu)(gu)(gu)折(zhe)愈合(he)過程中的(de)原始骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)形(xing)成(cheng)(cheng)期(qi),在骨(gu)(gu)(gu)(gu)(gu)折(zhe)端(duan)內(nei)(nei)、外(wai)形(xing)成(cheng)(cheng)骨(gu)(gu)(gu)(gu)(gu)組織逐(zhu)漸骨(gu)(gu)(gu)(gu)(gu)化(hua)(hua)(hua),形(xing)成(cheng)(cheng)新骨(gu)(gu)(gu)(gu)(gu),稱(cheng)為(wei)膜(mo)內(nei)(nei)化(hua)(hua)(hua)骨(gu)(gu)(gu)(gu)(gu)。外(wai)面逐(zhu)漸向(xiang)骨(gu)(gu)(gu)(gu)(gu)折(zhe)端(duan)生長,彼(bi)此(ci)會合(he)形(xing)成(cheng)(cheng)梭(suo)形(xing),稱(cheng)為(wei)內(nei)(nei)骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)和外(wai)骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)。骨(gu)(gu)(gu)(gu)(gu)折(zhe)斷(duan)端(duan)及髓腔(qiang)內(nei)(nei)的(de)纖維組織亦逐(zhu)漸轉化(hua)(hua)(hua)為(wei)軟骨(gu)(gu)(gu)(gu)(gu)組織,并隨軟骨(gu)(gu)(gu)(gu)(gu)細胞(bao)的(de)增生、鈣化(hua)(hua)(hua)而骨(gu)(gu)(gu)(gu)(gu)化(hua)(hua)(hua),稱(cheng)為(wei)軟骨(gu)(gu)(gu)(gu)(gu)內(nei)(nei)化(hua)(hua)(hua)骨(gu)(gu)(gu)(gu)(gu),而在骨(gu)(gu)(gu)(gu)(gu)折(zhe)處(chu)形(xing)成(cheng)(cheng)環狀骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)和髓腔(qiang)內(nei)(nei)骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)。兩部分骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)會合(he)后,這些原始骨(gu)(gu)(gu)(gu)(gu)痂(jia)(jia)(jia)不斷(duan)鈣化(hua)(hua)(hua)而逐(zhu)漸加強,當其達(da)到足(zu)以抵(di)抗肌收縮(suo)及成(cheng)(cheng)角、剪(jian)力(li)和旋轉力(li)時,則骨(gu)(gu)(gu)(gu)(gu)折(zhe)已達(da)到臨床(chuang)愈合(he),一般約需 4 - 8 周。