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The effect of ossicle resection in the lateral ligament repair for treatment of chronic lateral ankle instability.
Foot & Ankle International 2013 August
BACKGROUND: The management of an ossicle or avulsion fragment of the fibular tip in chronic lateral ankle instability is an open question. Some authors maintain the necessity of osteosynthesis for reconstruction of the lateral ligamentous structure if the fragment is large. We hypothesized that the modified Broström procedure with resection of the ossicle would result in good outcomes compared to that of the same procedure for chronic lateral instability patients without ossicle.
METHODS: Between December 2004 and December 2010, 102 patients underwent the modified Broström procedure for chronic lateral instability. Of these, 82 patients (86 ankles) were available for this study. Forty ankles had ossicles at the fibular tip (group O), 46 had no ossicle (group N). The average follow-up period was 33 months in group O and 37 months in group N. Irrespective of size, if there were ossicles we resected all fragments and performed the modified Broström procedure. To analyze the surgical outcome, American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot pain and function scales and Karlsson scores were compared between the 2 groups preoperatively and postoperatively.
RESULTS: Preoperative scores in the 2 groups showed no significant difference, except for AOFAS pain score. There was no significant difference in postoperative AOFAS pain and function score between the groups. Postoperative Karlsson score was significantly higher in group O than in group N (P = .001). Group O was divided into 2 subgroups by the largest diameter of the ossicle (< 10 mm and ≥ 10 mm); there was no significant difference in surgical outcomes.
CONCLUSIONS: In the treatment of chronic lateral instability of ankle, if there are ossicles on the fibular tip, osteosynthesis of the ossicles may not be necessary, even if the size is considerable. Modified Broström procedure after resection of the ossicle was successful.
LEVEL OF EVIDENCE: Level III, retrospective case series.
METHODS: Between December 2004 and December 2010, 102 patients underwent the modified Broström procedure for chronic lateral instability. Of these, 82 patients (86 ankles) were available for this study. Forty ankles had ossicles at the fibular tip (group O), 46 had no ossicle (group N). The average follow-up period was 33 months in group O and 37 months in group N. Irrespective of size, if there were ossicles we resected all fragments and performed the modified Broström procedure. To analyze the surgical outcome, American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot pain and function scales and Karlsson scores were compared between the 2 groups preoperatively and postoperatively.
RESULTS: Preoperative scores in the 2 groups showed no significant difference, except for AOFAS pain score. There was no significant difference in postoperative AOFAS pain and function score between the groups. Postoperative Karlsson score was significantly higher in group O than in group N (P = .001). Group O was divided into 2 subgroups by the largest diameter of the ossicle (< 10 mm and ≥ 10 mm); there was no significant difference in surgical outcomes.
CONCLUSIONS: In the treatment of chronic lateral instability of ankle, if there are ossicles on the fibular tip, osteosynthesis of the ossicles may not be necessary, even if the size is considerable. Modified Broström procedure after resection of the ossicle was successful.
LEVEL OF EVIDENCE: Level III, retrospective case series.
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