Self-designed conical point contact plate and clinical application

Todesignanewkindofconicalpoint contactplate (CPCP)intreatmentofdiaphysealfractureto avoidfurtherdamagetothebloodsupplyofthecortex . Methods: Therewere 4pairsofconicleswitha diameterof 1.5 4mmbeneaththeplatesymmetrically .The nibsoftheconicleswereembeddedabout 1 1.5mminthe cortexbytheaxialforceofscrews .Theconicleprovideda gapabout 2mmbetweentheplateandthebonesoasnotto compresstheperiosteumandcortex .Andtheperiostem didn tneedtobestrippedoffduringoperationandthere wasnoneedofpostoperativeexternalfixation . Results : Forty twocaseswithdiaphysealfracture werestabilizedbyusingCPCP .Thepatientscoulddojoint exercisewithoutloadingafteroperation .Partialweight bearingcouldbeperformedin 4 6weekspostoperatively . Therewasnoobviousexternalcallusinthesecases .The averagetimeofbonehealingwas 3monthsinthetibiaand forearmfractureand 4monthsinthefemur .Complications suchasinfection ,non unionormalunionetc .werenot found .Theimplantwasremoved 6 10monthsafter operation . Conclusions : CPCPhastheadvantagesofdrastic reductionoftheimplant to boneinterfacevirtually , eliminationoftheimpairmentoftheperiostealblood supply ,increaseoftherateofhealingandgoodstability whichmeetstheneedofearlyfunctionalexercise .