Exodontia: The Science and Technique of Tooth Extraction
Indications · Instruments · Technique · Socket Preservation · Complications
TL;DR
Exodontia (from Latin: ex = out; odont = tooth) is the branch of oral surgery concerned with the removal of teeth. It encompasses simple (closed) extraction using forceps and elevators, and surgical (open) extraction requiring mucoperiosteal flap reflection and bone removal. Successful exodontia depends on: correct pre-operative assessment, adequate anaesthesia, systematic PDL disruption before applying extraction forces, selection of the appropriate instrument for the tooth, controlled delivery along the path of least resistance, and evidence-based post-operative management.
- Indications are hierarchical — always explore conservation before extraction: The principal indications for extraction include: (1) dental caries that has destroyed so much tooth structure that restoration is not feasible (unrestorable caries — most common indication); (2) pulpal pathology (irreversible pulpitis or periapical disease) in teeth that are not suitable for or where the patient declines root canal treatment; (3) advanced periodontal disease with hopeless prognosis (Class III mobility, bone loss to the apex, furcation involvement incompatible with retention — particularly in the presence of systemic disease); (4) orthodontic extraction (most commonly upper and lower first premolars for arch-length discrepancy, Class II, or Class III treatment plans — based on full orthodontic assessment); (5) supernumerary teeth causing eruption problems, cyst formation, or crowding; (6) retained deciduous teeth with no permanent successor or blocking eruption of successor; (7) fractured teeth where the fracture line extends below the crestal bone such that no ferrule remains; (8) teeth involved in pathological lesions (cysts, tumours — extraction + enucleation); (9) preprosthetic surgery (teeth in the prosthesis field that interfere with denture design or have hopeless prognosis); (10) third molars with recurrent pericoronitis, associated pathology, or positional caries risk to adjacent second molar.
- The biomechanics of extraction rely on PDL disruption, socket expansion, and tooth delivery along a path that does not engage retentive anatomy: The periodontal ligament is the key structure enabling atraumatic extraction. The PDL is approximately 0.2–0.3mm wide and consists of collagen fibre bundles oriented in different directions (oblique, alveolar crest, horizontal, apical, interradicular). To extract a tooth with minimum bone loss and minimum force: (a) use a straight elevator or Warwick James elevator to insert into the PDL space and sever the fibre bundles on the accessible surface; rotate the elevator to dilate the socket and displace the tooth slightly — this uses the bone as a fulcrum and levers the tooth; (b) once the PDL is disrupted and the socket is dilated, apply correctly positioned forceps — the beaks should engage the root below the CEJ, not the crown, and must be placed parallel to the long axis of the root; (c) apply a controlled, slow luxation motion appropriate to the root form — for single conical roots (upper anterior, lower anterior), a combination of labial/lingual pressure and rotation; for multirooted teeth, figure-8 or buccal-palatal/lingual rocking only (no rotation — divergent roots resist rotation); (d) deliver the tooth in the direction of least resistance — usually buccally for most teeth, palatally for the upper first premolar (buccal root longer), and occlusally for impacted teeth after sectioning.
- Forceps are tooth-specific — using the correct forceps significantly reduces complications: Upper anterior teeth: upper straight forceps (beaks parallel, applied to labial and palatal root surfaces). Upper premolars: upper premolar forceps (one beak pointed for the buccal root, one flat for the palatal root). Upper molars: upper molar forceps (two broad curved beaks — right or left specific; the upper-right molar forceps has the pointed beak pointing to the right for the buccal furcation). Upper third molars: upper bayonet forceps. Lower teeth: lower universal forceps for anteriors and premolars (beaks parallel, can be used for any lower tooth); lower molar forceps (beaks angled, with pointed beaks engaging the buccal and lingual furcations). Lower root forceps: lower root forceps have narrow, curved beaks for engaging deep root stumps. A common exam question: the lower premolar is frequently extracted with lower universal forceps applied to the root in the buccal-lingual plane. Correctly identifying the beaks ensures the forceps seats subgingivally on root structure, not on crown enamel — crown fracture is the most common consequence of misplaced forceps.
- Socket preservation following extraction is the standard of care where future implant placement is anticipated: Following tooth extraction, the alveolar ridge undergoes significant resorption: approximately 50% of the ridge width is lost in the first year, with the majority occurring in the first three months. The buccal plate (which is thin, cortical bone with poor trabecular support) resorbs most. Horizontal bone loss averages 3–4mm; vertical bone loss averages 1–2mm in the first year. Socket preservation (alveolar ridge preservation, ARP) is a procedure where the extraction socket is filled with a bone graft material (autograft, allograft, xenograft, or alloplast — most commonly deproteinised bovine bone mineral [DBBM] such as Bio-Oss) and covered with a collagen membrane, then the flap is mobilised and closed, or the socket is left open-healing with the membrane alone. The goal is to maintain adequate bone volume for future implant placement without requiring more extensive augmentation. Systematic reviews show that socket preservation significantly reduces ridge resorption compared to unassisted healing, but does not eliminate it entirely.
- Dry socket (alveolar osteitis) is the most frequent post-extraction complication and is not an infection: The presentation, management, and risk factors for dry socket are the highest-yield exodontia topic on board examinations. Key points: dry socket presents at 2–4 days post-extraction with severe, throbbing, radiating pain that is unresponsive to over-the-counter analgesics; the socket contains an empty or disintegrated blood clot with visible/palpable bone; there is a characteristic foul odour (halitosis); there are no signs of infection (no pus, no lymphadenopathy, no fever, no elevated WBC). Management: warm saline irrigation to remove debris and food; placement of a sedative dressing (zinc oxide eugenol-impregnated ribbon gauze or an iodoform-based dressing such as Alvogyl) directly into the socket; change the dressing every 2–3 days until granulation tissue has formed from the socket walls. Antibiotics are NOT indicated. Smoking is the single most modifiable risk factor — the nicotine-induced vasoconstriction reduces clot formation and blood supply, and the negative pressure of smoking physically dislodges the clot.
Key Facts
What Is Exodontia?
Exodontia refers to the clinical procedures used to remove teeth from the alveolar bone. It is the most commonly performed surgical procedure in dentistry worldwide. While often viewed as a straightforward skill, expert exodontia requires a thorough understanding of dental and alveolar anatomy, biomechanical principles of force application, pharmacology of local anaesthesia, management of systemic medical conditions, and the biology of wound healing. The distinction between simple (closed) and surgical (open) extraction is based on whether soft tissue reflection and bone removal are required — not simply on the perceived difficulty of the case.
Why It Matters
Exodontia is tested on the INBDE and NBDE through clinical scenarios: Which instrument should be used? What is the sequence of steps? What complication has occurred and how should it be managed? What are the contraindications? Board questions frequently combine exodontia with anatomy (instrument selection based on root morphology), pharmacology (anticoagulants, bisphosphonates), and complications (dry socket, nerve injury, sinus communication). In clinical practice, complications from poorly executed extractions — root fractures, displacement into sinus or soft tissue, nerve damage, prolonged haemorrhage — are among the leading causes of dental litigation.
Indications and Contraindications
| Category | Indications | Notes |
|---|---|---|
| Caries-related | Unrestorable crown destruction; subgingival fracture below crestal bone with no ferrule; internal/external resorption rendering tooth non-restorable | Most common overall indication for extraction in adults |
| Periodontal | Hopeless prognosis (Class III furcation, bone to apex, mobility Grade III); strategic extraction to improve overall periodontal prognosis | Systemic disease (diabetes, HIV) can accelerate periodontal bone loss |
| Orthodontic | Arch-length discrepancy requiring space creation; most commonly upper/lower first premolars; also second premolars or first molars (if already heavily restored) | Decision made with orthodontist — extraction premature without a complete treatment plan |
| Prosthetic/preprosthetic | Teeth in denture field with poor prognosis; tori/exostoses removal; alveoloplasty | Timing: allow 6–8 weeks post-extraction before denture fabrication for ridge to stabilise |
| Pathology-related | Teeth associated with cysts or tumours; teeth in jaw fracture line (depending on stability); supernumerary teeth; teeth in radiation field prior to radiotherapy | Pre-radiation extractions should be completed ideally >3 weeks before radiation to allow healing — reducing OSTEORADIONECROSIS risk |
| Third molars | Recurrent pericoronitis; caries in third molar or adjacent second molar; associated cyst or tumour; periodontal bone loss distal to second molar | Prophylactic removal controversial in asymptomatic, erupted third molars |
Relative contraindications that require medical consultation or modification of technique: anticoagulation (check INR, use local haemostatic measures — do not routinely stop); bisphosphonate use (MRONJ risk — higher with IV bisphosphonates for malignancy); osteoporosis medications (denosumab — MRONJ risk similar to bisphosphonates); uncontrolled diabetes (impaired healing, infection risk — aim for HbA1c <9% before elective surgery); uncontrolled hypertension (defer elective extraction if systolic >180 or diastolic >110); bleeding disorders (haemophilia, von Willebrand disease — haematology liaison, desmopressin, factor replacement); active infection in the extraction site (acute periapical abscess with systemic signs — some advocate drainage and antibiotic cover before elective extraction; however, extraction of the tooth is itself curative in many cases and is not contraindicated in well-controlled local infection); radiation to the jaw (>50 Gy — osteoradionecrosis risk, refer to OMFS; hyperbaric oxygen protocols may be indicated).
Instruments
Elevators
Elevators work by wedging into the PDL space and using the alveolar bone as a fulcrum to luxate the tooth. The three mechanical principles of elevator action are: (1) Wedge — the tapered blade of the elevator is driven into the PDL space, wedging the root out of the socket; (2) Wheel and axle — rotating the handle (wheel) generates amplified force at the blade (axle); (3) Lever — the elevator blade (effort) acts against the alveolar bone crest (fulcrum) to lever the tooth (load) out of the socket. The critical safety rule for elevators: the elevator must always be held with a finger guard — the index finger of the non-dominant hand should be placed adjacent to the blade to prevent slippage and laceration of soft tissues if the elevator suddenly disengages. Common elevators: Warwick James (straight, left, right — used for PDL disruption and inter-radicular use); Coupland’s (chisel-tip — drives into PDL space to separate fibres, used for root elevation); Cryer’s (crossed pair — left and right, triangular blade — used inter-radicularly in mandibular molar sockets to elevate retained root tips using the inter-radicular bone as a fulcrum); Winter’s crossbar elevator (T-bar handle with large blade — for resistant impacted teeth); Periosteal elevator (Howarth’s or Mitchell’s — elevates mucoperiosteal flap from bone; not used for tooth elevation).
Forceps
| Forceps | Tooth | Beak Features | Motion |
|---|---|---|---|
| Upper straight (150) | Upper incisors, canines, premolars | Both beaks flat/straight | Rotation + labio-palatal rocking; deliver labially |
| Upper premolar (150A) | Upper premolars | One beak pointed (buccal root), one flat (palatal root) | Labio-palatal rocking; deliver buccally or palatally depending on root length |
| Upper molar right/left (79R/79L) | Upper molars | Two broad beaks — pointed beak for buccal furcation (right beak on right molar, left beak on left molar), flat beak for palatal root | Figure-8 motion (buccal-palatal rocking); deliver buccally |
| Upper bayonet (67) | Upper third molars, upper root fragments in posterior | Offset beaks on long handles to reach posterior | Buccal-palatal rocking; rotation if single/fused roots |
| Lower universal (16) | Lower incisors, canines, premolars, and roots | Beaks parallel, apply to buccal and lingual root surfaces | Buccal-lingual rocking; figure-8 for single-rooted; deliver buccally or lingually |
| Lower molar (17) | Lower first and second molars | Both beaks pointed — engage buccal and lingual furcations | Buccal-lingual rocking (figure-8); no rotation; deliver buccally |
| Lower root (root forceps) | Retained lower root tips | Narrow, angled beaks — fits into socket to reach apical root fragments | Rotation or figure-8 depending on root anatomy |
Extraction Technique
Simple (Closed) Extraction
A simple extraction is performed when the tooth is erupted, the crown is intact enough to grip, and no bone removal or flap reflection is needed. Step-by-step: (1) Pre-operative assessment — review medical history, identify contraindications, review radiograph (root number, form, curvature, proximity to anatomical structures — IAN, sinus), ensure signed consent; (2) Local anaesthesia — select appropriate block/infiltration; allow adequate time for full anaesthesia; confirm with a blunt probe before incision; (3) Soft tissue reflection — use a Howarth’s elevator or Mitchell’s trimmer to gently reflect the interdental papillae and free the gingival attachment from around the tooth neck — this prevents gingival tearing when forceps are applied; (4) PDL disruption with elevator — insert Warwick James or Coupland elevator into the PDL space on the widest/most accessible root surface (buccal for most teeth); rotate or push apically to sever PDL fibres and dilate the socket; move to the mesial and distal aspects; (5) Forceps application — select the correct forceps; seat the beaks firmly subgingivally on the root surface (not the crown), parallel to the long axis of the root; apply apical pressure to seat the forceps — this also helps disrupt remaining PDL; (6) Luxation — apply slow, deliberate, increasing-amplitude movements: for single-conical roots, labial-lingual rocking combined with gentle rotation; for multi-rooted teeth, buccal-lingual/palatal rocking only — rotation will fracture divergent roots; (7) Delivery — once the tooth is mobile, deliver along the path of least resistance — most upper and lower teeth deliver buccally; upper first premolars may deliver palatally; (8) Socket inspection and management — inspect the extracted tooth (confirm all roots present); inspect the socket with a curette — remove any granulation tissue, cystic tissue, or bone fragments; irrigate with saline; compress the socket walls with finger pressure; (9) Haemostasis — place a damp gauze over the socket and ask the patient to bite firmly for 30–60 minutes; (10) Post-operative instructions — both verbal and written.
Surgical (Open) Extraction
Surgical extraction is indicated when a simple extraction is not possible or likely to result in root fracture or unacceptable complication risk. Indications: ankylosed teeth (no PDL space — cannot be luxated); hypercementosis (bulbous root apex — cannot be delivered through socket); dilacerated roots (root curvature incompatible with delivery path); crown fracture (no structure to grip with forceps); impacted teeth; retained root tips below the crest; teeth with root proximity to IAN or sinus. The technique adds three steps to simple extraction: (a) raise a full-thickness mucoperiosteal flap (envelope, triangular, or trapezoidal); (b) remove sufficient bone with a surgical bur or chisel to expose and deliver the roots; (c) section the tooth (divide multi-rooted tooth into single-rooted segments; or section the crown from the roots to create separate deliverable pieces); suture the flap closed after socket management.
Socket Healing and Preservation
Normal socket healing follows a predictable sequence: (1) Blood clot (day 0–1): socket fills with blood → clot formed (fibrin scaffold); (2) Granulation tissue (days 2–5): fibroblasts and new capillaries (angiogenesis) invade the clot; (3) Connective tissue and woven bone (week 1–4): fibroblasts produce collagen; osteoblasts begin forming woven bone at the socket base; (4) Bone fill and remodelling (months 1–6): woven bone replaced by lamellar bone; socket walls resorb and remodel; crestal cortication begins; (5) Mature ridge (6–12+ months): lamellar bone fills the socket; ridge profile stabilises but remains reduced relative to pre-extraction dimensions. Socket preservation aims to intercept the resorption process by filling the void with a scaffold that maintains space for bone regeneration.
Special Considerations
Extraction in the medically compromised patient requires specific modifications. For patients on direct oral anticoagulants (DOACs — rivaroxaban, apixaban, dabigatran, edoxaban): current evidence-based guidelines generally recommend continuing DOACs for simple and surgical dental extractions, as the haemorrhagic risk is manageable with local haemostatic measures (socket suturing, oxidised cellulose, tranexamic acid mouthwash). Liaise with the patient’s prescribing physician for complex cases. For bisphosphonate-related osteonecrosis of the jaw (MRONJ): obtain a complete medication history (note route — oral vs. IV, duration, and indication — osteoporosis vs. malignancy); the risk is low for oral bisphosphonates used less than 4 years; high for IV bisphosphonates used for malignancy. Minimise trauma, optimise closure, monitor closely, consider referral to OMFS for IV bisphosphonate patients. For patients with cardiac devices (pacemakers, ICDs): avoid use of monopolar electrosurgery near the device; use bipolar if electrosurgery is needed; no specific extraction technique modifications. Antibiotic prophylaxis for infective endocarditis: current AHA/BSAC guidelines have substantially narrowed the indications — prophylaxis is now recommended only for high-risk cardiac conditions (prosthetic cardiac valves, prior infective endocarditis, certain congenital heart diseases). Patients on prophylaxis: amoxicillin 2g orally 30–60 minutes before procedure (or clindamycin 600mg if penicillin-allergic).
Complications of Extraction
| Complication | Cause | Presentation | Management |
|---|---|---|---|
| Root fracture | Excessive force without adequate PDL disruption; dilacerated or hypercementosed roots; ankylosis; use of crown rather than root grip | Partial root remains in socket | Assess size and location; remove if possible with Cryer’s elevator or small-beak forceps; leave if small (<3mm), apical, no infection, and patient informed; refer if unable to retrieve safely |
| Dry socket | Premature clot dissolution; smoking, female + OCP, traumatic extraction | Day 2–4: severe pain; empty socket; halitosis | Warm saline irrigation; sedative dressing (ZOE gauze/Alvogyl); change every 2–3 days; no antibiotics |
| Post-operative haemorrhage | Reactionary (immediate): inadequate haemostasis. Secondary (days 2–7): infection eroding vessel wall | Persistent or recurrent bleeding from socket | Pressure with gauze; socket suturing; haemostatic agents; tranexamic acid mouthwash; check anticoagulant status; systemic haemostatic agents if needed |
| Oro-antral communication (OAC) | Maxillary posterior tooth with root proximity to sinus floor; large root area relative to sinus; traumatic or surgical extraction | Nose blow test: air escapes from socket; antral tissue visible | <5mm: figure-8 suture + haemostatic plug + antibiotics; >5mm or persistent: immediate buccal advancement flap. Untreated → oro-antral fistula |
| Inferior alveolar nerve injury | Root proximity to nerve canal; deep surgical extraction; forceps or elevator displacement of apical fragment | Ipsilateral lip and chin paraesthesia/anaesthesia/dysaesthesia | Monitor; most neuropraxias resolve in weeks–months; refer to OMFS at 6–8 weeks if no recovery |
| Displacement into soft tissue or sinus | Apical force on maxillary molar root tip in proximity to sinus; lingual plate perforation with lower third molar fragment | Fragment not visible; imaging shows displacement | Do not chase blindly; refer to OMFS for planned retrieval under imaging guidance |
| Jaw fracture | Excessive force; compromised bone (osteoporosis, osteonecrosis, pathological lesion); deeply impacted mandibular third molars in older patients | Abnormal mobility of mandible; altered occlusion; pain | Immobilise; refer to OMFS immediately |
Clinical Considerations
- Pre-operative radiographic assessment is mandatory before any extraction — panoramic for third molars and complex cases, periapical for routine extractions: The radiograph must be taken and reviewed before picking up an instrument. Key information to extract: number of roots; root morphology (curved, dilacerated, hypercementosed, fused, widely divergent); proximity to the IAN (mandibular posterior); proximity to the maxillary sinus floor (maxillary posterior); size of periapical lesion (large lesions may indicate root-bone fusion via cementum or inflammatory ankylosis); presence of previous root canal treatment (root-treated teeth are often more brittle and the roots may be more prone to fracture); bone density changes (Paget’s disease, osteopetrosis, osteonecrosis).
- Ankylosis is the most common cause of unexpected extraction difficulty and root fracture in children and adolescents: Dentoalveolar ankylosis occurs when cementum fuses directly to alveolar bone — the PDL space is absent. On clinical examination, the ankylosed tooth has a characteristic “solid thud” (rather than the normal “dull thock”) when percussed. On radiograph, the PDL space appears absent or discontinuous. The extraction of an ankylosed tooth essentially requires surgical extraction with bone removal — standard elevator and forceps technique will fracture the root rather than luxate the tooth. If the tooth is being extracted for orthodontic reasons (ankylosis in a young patient), planned sectioning (luxation-sectioning) may be appropriate.
- Lower first molar extractions in adults often require sectioning due to divergent roots: The mandibular first molar typically has two widely divergent roots — mesial (broader, with two canals) and distal. The buccal and lingual cortical bone are often dense and resistant. Attempting to rock the tooth without prior root sectioning can fracture one root, leaving a deeply seated fragment. For a simple extraction that encounters resistance: consider converting to a surgical extraction — raise a buccal flap, section the crown at the furcation to create two separate single-rooted segments, and elevate each root individually. Root sectioning dramatically reduces the force required and prevents root fracture.
- Post-operative instructions must always be provided in writing and must specifically address dry socket prevention: Verbal instructions alone are insufficient — patients are often anxious after an extraction and do not retain verbal instructions reliably. The written instructions must include: no rinsing for 24 hours (to protect the blood clot); bite on gauze for 30–60 minutes; expected symptoms (mild ooze, swelling, discomfort for 2–3 days); warning signs requiring immediate contact (uncontrolled bleeding, increasing severe pain after day 2, fever, swelling of the face or floor of mouth); dietary advice (soft foods, avoid extremes of temperature); smoking advice (avoid for at least 72 hours minimum — 7 days ideally); analgesic regimen (scheduled paracetamol + ibuprofen for the first 48 hours is evidence-based and more effective than PRN dosing).
- Oro-antral communication must be identified immediately and managed at the time of extraction — do not defer: If OAC is suspected following maxillary posterior extraction, perform the nose-blow test: ask the patient to gently blow through the nose while occluding the nostrils — air bubbling from the socket or the patient reporting airflow through the socket confirms OAC. Immediate management prevents the communication from becoming an epithelialised fistula (which requires a formal surgical closure). Small communications (<5mm): tight figure-8 suture over the socket, pack with haemostatic material (Spongostan/Surgicel), prescribe amoxicillin + metronidazole and a nasal decongestant, and instruct the patient not to blow the nose. If the communication is >5mm, or if there is already antral tissue visible, proceed to a formal buccal advancement flap closure at the same visit.
Common Mistakes & Misconceptions
- Misconception: “Applying more force will remove a difficult tooth.”
Correction: Increasing force without first ensuring adequate PDL disruption and socket expansion is the most common cause of root fracture in exodontia. The correct response to a resistant tooth is to stop, reassess, re-infiltrate the PDL with local anaesthetic (intraligamentary injection), use the elevator more extensively to disrupt the PDL and dilate the socket, and consider converting to a surgical approach if needed. Force should be applied in a controlled, deliberate manner — the goal is not brute force but progressive PDL fibre severance and socket wall compression. - Misconception: “All patients on warfarin should stop their medication before a dental extraction.”
Correction: This is a dangerous misconception. Stopping warfarin dramatically increases the risk of life-threatening thromboembolic events (stroke, pulmonary embolism, deep vein thrombosis, cardiac valve thrombosis) — risks that vastly outweigh controllable dental haemorrhage. Evidence-based consensus guidelines recommend continuing warfarin for dental extractions, provided the INR is ≤3.5 on the day of the procedure, and using local haemostatic measures (socket suturing, oxidised cellulose, tranexamic acid mouthwash). Any adjustment to anticoagulant therapy must be made only by the prescribing physician. - Misconception: “Dry socket should be treated with antibiotics.”
Correction: Dry socket (alveolar osteitis) is a wound-healing failure — the blood clot has been lost, leaving bare, avascular alveolar bone. It is not a bacterial infection. Antibiotics have no benefit in the treatment of established dry socket and prescribing them contributes to antibiotic resistance. The correct treatment is symptomatic and local: irrigate the socket with warm saline and place a sedative dressing. If there are concurrent features suggesting infection (purulence, fever, lymphadenopathy, spreading swelling), this represents a separate diagnosis requiring separate management including antibiotics and drainage. - Misconception: “The upper molar forceps can be used on either side.”
Correction: Upper molar forceps are side-specific. The pointed beak is designed to engage the buccal furcation of the molar — on the right side, this buccal furcation is to the right, and on the left, it is to the left. Using the wrong forceps positions the pointed beak palatally, where it will lacerate the palatal mucosa and fail to engage the furcation, resulting in ineffective luxation and risk of tissue injury. The upper bayonet forceps (upper third molar forceps) are non-side-specific because the upper third molar root anatomy is typically single or fused, and no furcation engagement is needed. - Misconception: “Socket preservation grafting is only needed for aesthetic areas.”
Correction: While socket preservation is indeed most commonly discussed in the anterior aesthetic zone, it is equally important in the posterior regions where implant placement may be planned, the maxillary sinus limits available bone height, or the mandibular nerve limits vertical bone height. Posterior ridge preservation maintains bone volume that may otherwise be insufficient for implant placement without additional, more invasive augmentation procedures. The decision for socket preservation should be made based on the patient’s long-term restorative plan — not simply on aesthetics.
Related Topics
References & Sources
- Fragiskos FD (ed) (2007). Oral Surgery. Springer. [Comprehensive oral surgery reference — extraction technique, instruments, complications]
- Pedlar J, Frame JW (2007). Oral and Maxillofacial Surgery: An Objective-Based Textbook, 2nd ed. Churchill Livingstone. [Standard UK OMFS reference]
- Esposito M, Grusovin MG, Polyzos IP, et al. (2010). Timing of implant placement after tooth extraction: immediate, immediate-delayed or delayed implants? A Cochrane systematic review. European Journal of Oral Implantology, 3(3):189–205.
- Vignoletti F, Matesanz P, Rodrigo D, et al. (2012). Surgical protocols for ridge preservation after tooth extraction. A systematic review. Clinical Oral Implants Research, 23(Suppl 5):22–38. [Meta-analysis — socket preservation vs. unassisted healing; quantified bone loss prevention]
- Blum IR (2002). Contemporary views on dry socket (alveolar osteitis). International Journal of Oral and Maxillofacial Surgery, 31(3):309–317.
- Regan D, Srinivasan A, Petridis L, et al. (2020). Evidence-based guidance for the management of dental patients on anticoagulants. British Dental Journal, 228(4):257–262.
- Wilson W, Taubert KA, Gewitz M, et al. (2007). Prevention of infective endocarditis: guidelines from the AHA. Circulation, 116(15):1736–1754. [AHA antibiotic prophylaxis guidelines — substantially narrowed indications]
- Ruggiero SL, Dodson TB, Fantasia J, et al. (2014). AAOMS Position Paper on MRONJ — 2014 Update. Journal of Oral and Maxillofacial Surgery, 72(10):1938–1956.
Summary
Exodontia is the clinical science of tooth removal, underpinned by biomechanical principles, anatomical knowledge, and evidence-based post-operative management. The most common indication is unrestorable dental caries. Successful extraction follows a consistent sequence: anaesthesia → soft tissue reflection → PDL disruption with an elevator → correctly positioned forceps on the root → controlled luxation (rotation for single-rooted; rocking for multi-rooted) → delivery along the path of least resistance → socket management and haemostasis. Dry socket remains the most common complication (onset day 2–4; treated with sedative dressing, not antibiotics). Socket preservation following extraction maintains alveolar bone volume for implant placement by reducing the ~50% first-year ridge width loss that occurs with unassisted healing. Medical considerations — anticoagulants, bisphosphonates, endocarditis prophylaxis — require specific pre-operative management modifications.
Key Takeaways
- Extraction sequence: Anaesthesia → soft tissue reflection → PDL disruption (elevator) → correct forceps on root → luxation (rotate for single roots; rock for multi-roots) → delivery buccally → socket inspection and curettage → haemostasis → written post-op instructions.
- Forceps are tooth-specific: Upper molar forceps are side-specific (pointed beak engages buccal furcation). Lower molar forceps have two pointed beaks for furcations. Upper bayonet = non-side-specific = upper third molars. Never rotate multi-rooted teeth — rock only.
- Dry socket: Day 2–4; bare bone visible; severe pain; NOT infection; NO antibiotics. Warm saline + sedative dressing (ZOE/Alvogyl). Smoking = strongest modifiable risk factor.
- Socket preservation: Reduces but does not eliminate ~50% width loss in year 1. Gold standard: deproteinised bovine bone (Bio-Oss) + collagen membrane. Most important when implant is planned.
- Do NOT stop warfarin: INR ≤3.5 — proceed with local haemostatic measures. Stopping anticoagulation risks thromboembolism far more than controllable surgical bleeding.
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