Ebraheim N A, Mekhail A O, Gargasz S S
Department of Orthopaedic Surgery, Medical College of Ohio, Toledo 43699, USA.
Foot Ankle Int. 1997 Aug;18(8):513-21. doi: 10.1177/107110079701800811.
Thirty-two cases of ankle fractures associated with fibular fractures above the distal tibiofibular syndesmosis were studied. All were treated with open reduction and internal fixation. The average follow-up was 25 months. The results of the postoperative evaluation were rated, based on subjective clinical criteria, as good, fair, and poor. According to the Lauge-Hansen classification, there were 17 (53%) cases of supination-external rotation injury (2 stage 2 and 15 stage 4), 9 (28%) cases of stage 3 pronation-abduction injury, and 6 (19%) cases of pronation-external rotation injury (3 stage 3 and 3 stage 4). All cases could be classified as Weber type C or as suprasyndesmotic, fibular diaphyseal fracture (44-C) according to the Orthopaedic Trauma Association classification. In 18 (56%) cases, the fracture was associated with ankle dislocation. There were seven (22%) open fractures, (two grade I, four grade II, and one grade IIIA). Syndesmotic screws were used in 23 (72%) cases (12 supination-external rotation injury, 6 pronation-external rotation injury, and 5 pronation-abduction injury). The syndesmotic screw was removed after an average of 9 weeks. Four (13%) nonunions and two (6%) delayed unions of the fibula were treated with bone grafting and/or hardware revision and eventually healed. Three of the nonunions had poor clinical results because of degenerative ankle joint arthritis in two (one of them ended in arthrodesis) and deep infection, which was eventually cured, in the third. The fourth nonunion had a fair result. One of the delayed unions had a fair result (an obese patient) and the other had a good result. Two patients developed deep infections; one ended in gangrene and amputation in a diabetic patient, and the other was a patient with fibular nonunion that eventually healed. Three patients had superficial infections that were treated successfully. Of the 32 cases, 23 (72%) showed good results, 4 (13%) showed fair results, and 5 (16%) showed poor results. The cases with poor results included three fibular nonunions, one deep infection, and one recurrent superficial infection and wound dehiscence after hardware removal. A syndesmotic screw is usually needed in cases of fracture-dislocations. Two patients with occult fibular nonunions developed diastasis of the syndesmosis after removal of the syndesmotic screw. It was found that reduction and temporary pinning of the distal tibiofibular joint helps achieve fibular length, which is crucial to restoring the biomechanics of the ankle joint. It seems advisable not to remove the syndesmotic screw until there are signs of healing of fibular fracture to avoid diastasis of the distal tibiofibular joint. Bone grafting should be considered in high energy fractures with comminution. These complex injuries are associated with higher rates of complications. Poor results can be attributed to fracture factors, e.g., open fractures, infections; patient factors, e.g., obesity, lowered immunity as in diabetes, and noncompliance; and iatrogenic factors, e.g., early removal of syndesmotic screws.
对32例伴有胫腓下联合上方腓骨骨折的踝关节骨折病例进行了研究。所有病例均采用切开复位内固定治疗。平均随访时间为25个月。术后评估结果根据主观临床标准分为优、良、差。根据Lauge-Hansen分类,旋后-外旋损伤17例(53%)(2例Ⅱ度和15例Ⅳ度),旋前-外展损伤Ⅲ度9例(28%),旋前-外旋损伤6例(19%)(3例Ⅲ度和3例Ⅳ度)。根据骨科创伤协会分类,所有病例均可归类为Weber C型或胫腓联合上腓骨干骨折(44-C型)。18例(56%)病例骨折伴有踝关节脱位。开放性骨折7例(22%)(2例Ⅰ级、4例Ⅱ级和1例ⅢA级)。23例(72%)病例使用了下胫腓联合螺钉(12例旋后-外旋损伤、6例旋前-外旋损伤和5例旋前-外展损伤)。下胫腓联合螺钉平均9周后取出。4例(13%)腓骨骨不连和2例(6%)腓骨延迟愈合采用植骨和/或内固定翻修治疗,最终愈合。3例骨不连临床效果差,2例因踝关节退行性关节炎(其中1例最终行关节融合术),第3例因深部感染(最终治愈)。第4例骨不连效果为良。1例延迟愈合效果为良(肥胖患者),另1例效果为优。2例发生深部感染;1例糖尿病患者最终坏疽截肢,另1例为腓骨骨不连患者最终愈合。3例发生浅表感染,均成功治疗。32例中,23例(72%)效果为优,4例(13%)效果为良,5例(16%)效果为差。效果差的病例包括3例腓骨骨不连、1例深部感染、1例取出内固定后复发表浅感染和伤口裂开。骨折脱位病例通常需要使用下胫腓联合螺钉。2例隐匿性腓骨骨不连患者在取出下胫腓联合螺钉后出现下胫腓联合分离。发现胫腓下关节的复位和临时固定有助于恢复腓骨长度,这对恢复踝关节生物力学至关重要。在腓骨骨折有愈合迹象之前,似乎不宜取出下胫腓联合螺钉,以避免下胫腓联合分离。对于伴有粉碎的高能骨折应考虑植骨。这些复杂损伤并发症发生率较高。效果差可归因于骨折因素,如开放性骨折、感染;患者因素,如肥胖、糖尿病患者免疫力低下和不依从性;以及医源性因素,如过早取出下胫腓联合螺钉。