A surgical tool assembly for forming holes in bone at precise locations to controlled depths. The hole forming tool has a leading apical tip and a shank. The shank includes an annular groove at a predetermined distance from the apical tip. An adjustable telescopic stop is coupled to the shank. The telescopic stop includes an indexing gauge supporting a tubular key. The key includes an integrated impeller that accentuates irrigation of the treatment site during surgical procedures. The adjustable telescopic stop may be used in combination with a guided surgery jig. The jig includes a guide bushing having a generally semi-cylindrical alignment valley adapted to receive the spinning key of the telescopic stop. The alignment valley includes a full annular internal abutment step adapted to engage the key when the apical tip reaches a predetermined penetration depth in the bone.本發明揭示一種用於在骨中之精確位置處形成孔至受控制深度之手術工具總成。該孔形成工具具有一前導頂端及一柄。該柄包含位於與該頂端相距一預定距離處之一環形凹槽。一可調整可伸縮止檔耦合至該柄。該可伸縮止檔包含支撐一管狀榫之一分度計。該榫包含在手術程序期間協助治療部位之灌注之一整合式葉輪。該可調整可伸縮止檔可與一導引手術夾具組合使用。該夾具包含具有經調適以接納該可伸縮止檔之該旋轉榫之一大體上半圓柱形對準凹處之一導套。該對準凹處包含經調適以在該頂端達到骨中之一預定穿透深度時嚙合該榫之一全環形內部相接階梯。30‧‧‧無齒顎部部位39‧‧‧灌注/灌注流體40‧‧‧柄102‧‧‧平坦段104‧‧‧夾取凸緣106‧‧‧不連續處108‧‧‧扇形件156‧‧‧榫160‧‧‧葉片槽184‧‧‧彈性指狀物188‧‧‧夾具190‧‧‧導套
