Dental Implant Surgery
Dental Implant Surgery
Dental implant surgery requires understanding implant biology (osseointegration, bone healing), implant design (threads, surface, connection), preoperative assessment (bone volume, density, proximity to vital structures), surgical principles (sterility, atraumatic extraction, drilling protocol, heat generation), and prosthetic considerations (angulation, emergence profile, load distribution). Key concepts include primary stability (mechanical engagement) vs. secondary stability (biological osseointegration), insertion torque, resonance frequency analysis, and bone remodeling. Also know contraindications (uncontrolled diabetes, smoking, head/neck radiation, bisphosphonates), complications (bleeding, nerve injury, infection, implant failure), and maintenance (peri-implant mucositis vs. peri-implantitis).
Traps: confusing peri-implant mucositis (reversible inflammation, no bone loss) with peri-implantitis (bone loss + inflammation). Another trap: assuming that immediate implant placement is always contraindicated in infected sites; evidence supports it in selected cases with proper debridement. Also, insertion torque does not linearly correlate with osseointegration; excessive torque can cause ischemia. Bone density (Lekholm & Zarb) affects drilling protocol: type IV bone (low density) requires underpreparation or tapping.
Worked example: A patient with a missing mandibular first molar has a ridge width of 5 mm and a crown height space of 8 mm. A standard 4.1 mm implant requires at least 1.5 mm of bone on each side, so minimum ridge width = 4.1 + 3 = 7.1 mm. This ridge is too narrow; consider ridge augmentation or a narrow-diameter implant (but avoid in molar region due to load). Rule of thumb: 2 mm from adjacent teeth, 1.5 mm from implants, 2 mm from vital structures (e.g., inferior alveolar nerve).
Key concepts: osseointegration (direct bone-implant contact), delayed vs. immediate loading, platform switching, and peri-implantitis management (non-surgical debridement, surgical resection, or explantation).