wedgy

(1) Geometry model of roller bit’s sphere tooth, wedgy tooth and bucket shape tooth were established;

（1）建立了牙轮钻头的球形齿、楔形齿和勺形齿三维空间的几何；

Partial gastrectomy was performed in four cases, distal gastric curative resection in one case, and local wedgy resection in one case.

部病例均经手术治，切除标本经病理检疫组化证实；