Preoperative Assessment and Patient Evaluation

Successful tooth extraction begins with comprehensive preoperative evaluation. Medical history assessment identifies contraindications including anticoagulation therapy, bisphosphonate treatment, cardiac arrhythmias, and immunosuppression. Anticoagulated patients (warfarin INR >3, direct oral anticoagulants) require modification of extraction protocols, though stopping anticoagulation is rarely necessary as bleeding can be controlled with local measures.

Bisphosphonate therapy (IV nitrogen-containing agents β‰₯3 years duration or any duration IV zoledronate) increases medication-related osteonecrosis risk to 1-12% depending on drug type and duration. Extractions in bisphosphonate patients require surgical protocols including antibiotic coverage (amoxicillin-clavulanate or clindamycin 600 mg daily for 5 days), careful bone handling, and avoidance of sharp bone edges causing mucosal trauma.

Radiographic assessment determines tooth anatomy and surgical complexity. Periapical radiographs (PA, modified PA angles) show root morphology and relationship to inferior alveolar canal. Panoramic radiographs visualize bilateral anatomy and provide canal location estimates. Cone-beam computed tomography (CBCT) provides three-dimensional information including precise canal location, bone density, and impaction depthβ€”invaluable for surgical planning in complex cases.

Complexity assessment predicts operative time and complication risk. Simple extractions (vital, non-impacted, full crown visibility, adequate mobility) take 2-5 minutes. Moderate complexity (impacted, deeply placed, curved roots, dense bone) requires 10-20 minutes. Complex extractions (deeply impacted, close to neurovascular structures, previous failed attempts) require 30-60+ minutes and specialist referral consideration.

Extraction Classification and Difficulty Scoring

The Pederson difficulty index predicts operative time and complication probability using three variables: depth of impaction (level A/B/C), position of impaction (mesioangular/vertical/horizontal/distoangular), and bone density (D1/D2/D3/D4). Sum scores of 4-6 indicate simple extraction (likelihood of complications <15%), 7-8 moderate difficulty (complications 15-40%), and 9-10 complex extraction (complications >40%).

Rood and Shear classification uses three radiographic factors: root apex position relative to inferior alveolar canal, cortication of canal walls, and narrowing of canal. Low-risk cases (no contact, clear canal outline) show <0.5% nerve injury. Moderate-risk cases (slight contact/narrowing) show 1-2% injury risk. High-risk cases (root apex contacts canal, canal cortication absent) show 5-10% injury risk requiring surgical protocol modification.

Tooth mobility assessment determines extraction difficulty. Loosened teeth (Grade 2-3 mobility) extract easily with applied force alone. Firm teeth require elevation prior to forceps application. Evaluating root morphology (single versus multiple roots, root curvature) predicts forceps grip challenges. Caries affecting tooth structure require sectioning into smaller pieces for removal rather than forcing intact tooth removal.

Anesthetic Selection and Dosing

Local anesthetic selection balances analgesia duration, hemostasis, and toxicity risk. Lidocaine 1% with 1:100,000 epinephrine provides anesthesia duration of 60-90 minutes and hemostasis for 90-120 minutes. Single infiltration of 1.8 mL (36 mg) achieves adequate soft tissue anesthesia. Additional 1-2 mL (36 mg) infiltration at surgical site and lingual aspect provides complete anesthesia.

Inferior alveolar (IA) nerve block for mandibular teeth provides anesthesia of ipsilateral teeth, anterior mandible, and lip. IA block uses 1.7-1.8 mL (34-36 mg) lidocaine injected at the lingula (medial aspect of mandibular ramus at occlusal level). Landmark technique (palpating internal oblique ridge and anterior border of ramus) achieves 85% success rate. Incisive nerve infiltration (0.6 mL anterior to mental foramen) provides supplemental anesthesia when IA block incomplete.

Lingual nerve anesthesia is essential for mandibular tooth extraction. Lingual infiltration of 0.5-1.0 mL (10-18 mg) at lingual aspect of extraction site ensures painless lingual flap reflection. Buccal infiltration provides soft tissue anesthesia on buccal aspect. Total epinephrine dose should not exceed 0.2 mg (200 mcg) in cardiac patients or those on tricyclic antidepressants.

Maximum safe lidocaine dose is 4.4 mg/kg with epinephrine (healthy patients) or 2.2 mg/kg without epinephrine. A 70 kg adult can safely receive 310 mg lidocaine with epinephrine, equivalent to approximately 9 standard cartridges (36 mg each). Exceeding safe doses risks systemic toxicity (tremor, seizures, arrhythmias) requiring oxygen, IV access, and seizure management (diazepam 5 mg IV).

Simple Extraction Technique

Simple extractions of anterior teeth require four sequential steps: anesthesia, soft tissue elevation, tooth elevation, and removal. After achieving anesthesia, elevate soft tissue from all surfaces using minimal elevator pressure. Insert periosteal elevator mesial and distal to tooth crown, elevating firmly but gently to separate periodontal ligament.

Tooth elevation using small luxator elevators initiates tooth separation from alveolus. Apply gentle force at multiple angles (buccal 30Β°, palatal/lingual 30Β°, apical), allowing periodontal ligament fibers to stretch and separate rather than fracture. Each elevation application should apply 2-3 seconds pressure without jerking. Progressive small movements separate tooth from alveolar socket within 1-2 minutes.

Once tooth mobility achieved (Grade 3), apply forceps with firm grip around crown. Apply slow, controlled rocking motions alternating buccal and palatal/lingual directions. Avoid apical pressure (pulling straight up), which fractures roots. Rotating the crown 45-90 degrees facilitates final separation. Most anterior teeth extract within 1-3 additional minutes of rocking motions.

After extraction, curettage of socket walls removes inflamed tissue, reduces infection risk, and accelerates healing. Using a sharp spoon excavator (size 17, 21, or 23), scrape lateral walls and apex to remove granulation tissue and inflamed bone. This step takes 1-2 minutes and reduces infection rates from 8% to 3-4%.

Surgical Extraction of Impacted Teeth

Impacted tooth removal requires surgical exposure through bone removal and soft tissue reflection. Under general anesthesia (nitrous oxide 50%/oxygen 50% or IV sedation), establish hemostasis through infiltration of 2-3 mL of 1% lidocaine with 1:100,000 epinephrine at surgical site.

Soft tissue incision extends from one tooth mesial to the impaction through the attached gingiva, curving around the lingual aspect if accessible. Mesial and distal releasing incisions provide flap mobility (8-10 mm) for visualization. Reflect full-thickness flap (mucosa and periosteum) to expose surgical site completely.

Bone removal with high-speed bur (#245 or #245H) with water cooling exposes 50-75% of impacted crown. Remove bone mesially, distally, and occlusally based on impaction position. For mesioangular impactions (most common, 43% of cases), remove buccal bone to expose crown and facilitate application of extraction elevators.

For horizontal impactions (10-15% of cases), remove superior bone completely to expose crown fully. These teeth often require sectioning into smaller fragments. Using a fine-toothed bur, section the tooth into two or three pieces at crown-root junction or between roots. Section the pieces individually using luxator elevators and minimal force.

For distoangular impactions (25-35% of cases), most of the crown is exposed buccally. Bone removal should create a channel for elevation rather than extensive removal. Elevators applied mesially or lingually facilitate distal rocking and removal.

Impaction Position-Specific Extraction

Mesioangular third molars (most common, easiest to remove) typically extract as single units once bone is removed. Following bone removal, apply elevator mesially, exert pressure 10-15 seconds. This rotates tooth lingually/superiorly while widening the distal socket space. Once mobility achieved, use molar forceps or elevator for final removal.

Vertical impactions (22-25% of cases) require sufficient buccal bone removal to create path of insertion. Minimal bone removal is possible since the crown is already vertically aligned. Once bone cleared buccally, forceps are applied and tooth is elevated with straight apical-occlusal motion.

Horizontal impactions require more extensive bone removal. Removing superior and buccal bone is necessary to free crown sufficiently. Sectioning into crown and root fragments is often required. Crown extraction usually achieves removal, leaving roots for separate final extraction.

Distoangular impactions require distal socket widening. Apply elevator or small molar forceps at the distolingual line angle, rock the tooth anteriorly and lingually. Distal bone removal of 3-4 mm provides adequate space for final extraction.

Complications During Extraction and Management

Excessive bleeding during extraction occurs in 1-3% of cases. Small vessels can be controlled by packing with epinephrine-soaked gauze (1:10,000 epinephrine) for 5 minutes. Vessels >1 mm require suture ligation using absorbable 2-0 or 3-0 ties, or cauterization (electrosurgery at 5-10 watts cutting mode).

Tooth fracture during extraction occurs in 2-10% of cases depending on root morphology. Root tips <3 mm often resorb without intervention. Root tips 3-5 mm can be observed radiographically at 3-4 weeks post-extraction; if mobile or causing symptoms, removal is indicated. Root tips >5 mm should be retrieved if surgery is straightforward; deep root tips may be observed if extraction would cause excessive trauma.

Root split during elevation requires sectioning the remaining tooth into smaller fragments. Using a fine bur and elevator technique, separate the tooth pieces and remove individually. This prevents excessive force and reduces alveolar bone trauma.

Sinus opening occurs in 5-15% of maxillary posterior extractions. Small openings (<3 mm) with intact Schneiderian membrane typically require no intervention. Larger openings require closure with absorbable sutures or membrane material. Persistent oral-antral communication requires surgical closure (palatal pedicle flap or buccal pedicle flap) at 4-6 weeks if closure doesn't occur spontaneously.

Postoperative Hemorrhage Management

Primary hemorrhage (during extraction) occurs in 1-3% of cases and usually controlled with local measures. Secondary hemorrhage (24-48 hours post-extraction) occurs in 0.5-1% of cases. Patients should be advised to bite on gauze 30-45 minutes; if bleeding continues, they should contact the office.

Management of postoperative hemorrhage includes gentle pressure with epinephrine-soaked gauze, suturing the socket walls with absorbable sutures creating a barrier, or packing with hemostatic agents (gelatin sponge with thrombin, microfibrillar collagen). Platelet plug formation requires 5-10 minutes pressure undisturbed.

Patients should rinse with warm salt water beginning 24 hours post-extraction, avoiding vigorous spitting which disrupts the clot. Soft foods and head elevation reduce rebleeding. Anticoagulated patients may require extended pressure (45-60 minutes) or supplemental hemostatic measures.

Extraction Outcome Assessment

Successful extraction removes the entire tooth with minimal trauma, achieves hemostasis within 10 minutes, closes soft tissue with tension-free primary sutures, and heals without infection or major complications. Pain should resolve within 3-5 days. Swelling peaks at 48-72 hours then gradually resolves over 5-7 days.

Patient education regarding postoperative care, activity restriction, and expected healing timelines improves outcomes. Specific instructions include 24-hour activity restriction (bed rest with head elevated 30 degrees), continued gentle rinsing after day 1, soft foods for 2-3 weeks, and avoidance of alcohol and smoking.

Follow-up assessment at 1 week (suture removal for non-absorbable sutures), 2 weeks (confirm healing), and 4 weeks (radiograph for retained roots if symptoms) ensures uncomplicated healing. Patients demonstrating normal healing parameters progress to functional activities and definitive prosthetics as indicated.