Surgical Phases of Implant Care: Timing, Placement, and Complication Awareness
Framework
Surgical phase questions test sequencing and decision-making: extraction and socket management, timing of implant placement (type 1 immediate, type 2 early with soft tissue healing, type 3 early with partial bone healing, type 4 delayed), flap design, guided bone regeneration, sinus elevation (crestal vs lateral), and torque/loading decisions. Know the biologic rationale for each timing type and the conditions required for immediate placement (intact socket walls, no acute infection, adequate apical bone for primary stability).
Stability and loading
Primary stability depends on bone density, implant geometry, and surgical technique. ISQ (implant stability quotient) and insertion torque are surrogate measures; high torque does not guarantee osseointegration. Understand when immediate or early loading is acceptable (single unit, good stability, no parafunction) versus when delayed loading is safer.
Traps
Common distractors: assuming immediate placement is always preferred after extraction; confusing crestal and lateral sinus approaches; or selecting a graft material without matching it to the defect (particulate autograft/xenograft for contained defects, block graft for horizontal augmentation). Another trap is attributing neurosensory injury to anesthesia when implant proximity to the canal is the cause.
Rule of thumb
Match the approach to the defect: contained defects (four walls) tolerate particulate graft and membrane; non-contained defects need a barrier or block. Example: a posterior maxilla with 4 mm residual bone and a flat sinus floor - a lateral window approach with particulate graft is generally favored over a crestal approach because of limited height and access.
Key concepts
Extraction timing types, primary stability, GBR principles, sinus elevation techniques, flap design, complication recognition (bleeding, nerve injury, sinus perforation, infection).