A New Design And Clinical Efficacy Of Assembled Bar-type Locking Plate In The Treatment Of Sander ?,? Calcaneal Fractures

Objective To design a new assembled bar-type locking plate suitable for sinus tarsi approach for treatment of Sanders Type II and III displaced calcaneal fractures and explore its clinical therapeutic efficacy.Methods 18 cases of displaced calcaneal fractures in 18 patients were treated with the minimally-invasive percutaneous plates via sinus tarsi approach under the C�arnl image intensifier monitor from March,2014 to October,2015.There were 14 cases of Type ?(8 cases of Type ?a?4 cases of Type and 2 cases of Type ?c)and 4 cases of Type III(2 cases of Type ?ab and 1 case of Type ?ac and ?bc respectively),according to Sanders classification system.Pre and postoperatively radiographic examination was performed to determine the calcaneal anatomical parameters,including Bohlers angle,Gissanes angle,height,width and length.Post-operative observation on lateral incision healing was performed and clinical functional results were evaluated based on Maryland foot score system.Results All patients were followed-up for an average of 9.3�3.7(ranging from 6 to 13.5 months)months.Lateral X-rayed showed satisfactory restoration of the calcaneal parameters including height,width,length,Bohlers angle and Gissanes angle,compard with pre-operative parameters.Maryland foot scores demonstrated excellent data in 18 cases with excellence in 11 cases(l 1/18),good in 5 cases(5/18),and the excellent rate up to 88.1%.Postoperative complications with soft tissue were not found in all cases of patients.Conclusions This new design of assembled bar-type locking plate,suitable for sinus tarsi approach has not only presented advantages on intra-operative injury control and incision healing performance by minimally-invasion technology,but it also highlights better clinical outcomes.