Kuwait Dental Board Oral & Maxillofacial Surgery key terms

A rapidly spreading bilateral cellulitis of the submandibular, sublingual, and submental spaces that indurates the floor of the mouth and elevates the tongue, threatening airway obstruction and requiring urgent surgical decompression plus intravenous antibiotics.

A bacterial process arising from a necrotic pulp, periodontal pocket, or infected surgical site that spreads along fascial planes and is typically polymicrobial, dominated by anaerobic and streptococcal species.

Suppuration tracking from a maxillary canine root above the buccinator attachment to obliterate the nasolabial fold and swell the lower eyelid, often mistaken clinically for orbital or dacryocystitis pathology.

Definitive elimination of the origin of infection, such as pulp extirpation, extraction, periodontal debridement, or incision and drainage, without which antibiotics alone cannot resolve an odontogenic collection.

Progressive narrowing of the upper airway from swelling, hematoma, or edema, signalled by stridor, voice change, drooling, tripod positioning, or falling oxygen saturation, and managed by early intubation or surgical airway before deterioration.

An emergency front-of-neck airway created through the cricothyroid membrane when intubation and supraglottic rescue fail, providing a temporary route for oxygenation in a cannot-intubate, cannot-ventilate situation.

A horizontal fracture separating the maxilla from the skull base that passes through the nasal floor, maxillary sinus walls, and pterygoid plates, producing a mobile palate and midface retrusion.

A pyramidal midface fracture running from the nasal bridge through the medial orbital wall, orbital floor, and zygomaticomaxillary suture to the pterygoid plates, often causing step deformity and cerebrospinal fluid rhinorrhoea.

A complete craniofacial disjunction in which the fracture line crosses the nasofrontal suture, orbital walls, and zygomatic arches, detaching the entire midface from the cranial base.

Leakage of clear glucose-containing fluid from the nose after midface or skull base trauma, indicating a dural tear and raising the risk of ascending meningitis; persistent leaks may need neurosurgical repair.

Temporary immobilisation of the jaws by wiring or elastics between maxillary and mandibular teeth or fixation devices, used to restore occlusion after fracture reduction or orthognathic surgery.

Stabilisation of fractured or osteotomised bone with plates and screws that resist functional loading, allowing earlier jaw movement and reduced need for prolonged maxillomandibular fixation.

A reconstruction principle in which plates carry the full functional load across a defect or fracture, used in continuity defects or comminuted mandible fractures where bone contact cannot share the stress.

A developmental cyst arising from dental lamina remnants with a thin corrugated keratinised lining, locally aggressive behaviour, high recurrence after enucleation, and association with PTCH1 mutation and naevoid basal cell carcinoma syndrome.

A benign but locally invasive epithelial odontogenic tumour, most often in the posterior mandible, showing a soap-bubble radiolucency and requiring resection with margins rather than simple curettage because of high recurrence.

A benign but infiltrative mesenchymal odontogenic tumour of the jaws that appears as a multilocular radiolucency with fine trabeculae and is treated by resection because of its tendency to recur.

Complete removal of a cyst or tumour lining as a single intact specimen from its bony cavity, allowing full histological examination and reducing recurrence compared with simple drainage.

Surgical creation of a permanent window into a cyst cavity so that pressure falls and the lesion shrinks, used to decompress large cysts and preserve adjacent structures before later definitive removal.

The commonest benign salivary gland tumour, arising most often in the parotid superficial lobe, with mixed epithelial and myxochondroid histology and a risk of malignant transformation if incompletely excised.

The commonest malignant salivary gland tumour, graded by the proportion of mucinous, intermediate, and epidermoid cells, with low-grade lesions behaving indolently and high-grade lesions metastasising to regional nodes.

Identification and anatomical protection of the facial nerve trunk and its branches during parotid surgery, using landmarks such as the tragal pointer and tympanomastoid suture to avoid permanent facial palsy.

Removal of the parotid superficial to the facial nerve plane, the standard operation for a mobile benign parotid tumour, preserving nerve function while achieving clear margins.

Systematic removal of cervical lymph node levels for staging or treating metastatic oral and maxillofacial malignancy, classified as radical, modified radical, or selective according to the structures preserved.

Injection of a tracer around a tumour to identify and remove the first draining lymph node, allowing nodal staging of clinically node-negative early oral squamous cell carcinoma without a full neck dissection.

The commonest oral malignancy, linked to tobacco, alcohol, and areca use, presenting as a non-healing ulcer with indurated rolled margins; treatment is wide surgical excision with margin control and nodal management.

Transfer of vascularised tissue from a donor site, such as fibula, radial forearm, or anterolateral thigh, with microvascular anastomosis to reconstruct composite jaw and soft tissue defects after ablative surgery.

Removal of a full-thickness section of mandible or maxilla including periosteum, used for aggressive benign tumours or malignancy, typically requiring immediate reconstruction to restore continuity and occlusion.

Injection of local anaesthetic near the mandibular foramen to anaesthetise the inferior alveolar, mental, and incisive branches, the standard technique for mandibular molar anaesthesia with the highest failure rate of intraoral blocks.

Neurological and cardiovascular effects of excessive plasma local anaesthetic, ranging from perioral tingling and tinnitus to seizures and arrhythmia, treated by airway support and intravenous lipid emulsion for bupivacaine.

The weight-based ceiling for local anaesthetic administration calculated from the drug's milligram per kilogram limit, adjusted for vasoconstrictor content and patient factors such as age and hepatic function.

Drawback of blood into the cartridge during injection, indicating intravascular needle placement; the needle must be repositioned and the injection repeated slowly to avoid systemic toxicity.

A pharmacogenetic reaction to volatile anaesthetics and succinylcholine causing uncontrolled muscle hypermetabolism, hypercarbia, rigidity, and rising temperature, treated immediately by stopping the trigger and giving dantrolene.

A drug-induced depression of consciousness in which the patient responds purposefully to verbal command and maintains airway and ventilation unaided, used to reduce anxiety during oral surgery.

A preoperative classification of systemic health from I to VI used to stratify anaesthetic and surgical risk, guide setting of care, and document fitness for sedation or general anaesthesia.

Administration of antibiotics before a procedure to prevent infection in at-risk patients, such as those with prosthetic heart valves or previous infective endocarditis, following current guideline regimens.

Exposed bone persisting beyond eight weeks in a patient receiving antiresorptive or antiangiogenic drugs, without radiation history, requiring prevention through pre-treatment dental assessment and conservative surgical management.

Anterior or medial displacement of the articular disc that produces clicking, limited opening, or locking, diagnosed clinically and by imaging and managed initially with conservative therapy and occlusal appliances.

A removable hard acrylic appliance worn over the teeth to redistribute occlusal forces, reduce parafunction, and relieve masticatory muscle and joint symptoms in temporomandibular disorders.

Surgical removal of the coronoid process to release a fibrotic or elongated coronoid causing restricted opening, performed intraorally and followed by early physiotherapy.

A horizontal osteotomy of the maxilla above the apices that allows advancement, impaction, or rotation of the maxilla to correct skeletal discrepancies and reposition the occlusal plane.

A mandibular ramus osteotomy splitting the bone sagittally to allow advancement or setback of the tooth-bearing segment, the standard orthognathic procedure for mandibular repositioning.

Surgical repositioning of the chin by sliding osteotomy or alloplastic augmentation to correct contour, projection, or asymmetry, often combined with orthognathic procedures.

Direct structural and functional union between living bone and the surface of a load-bearing implant without intervening fibrous tissue, the biological basis of dental implant success.

Mechanical engagement of an implant with bone at insertion, determined by bone density, drill protocol, and implant geometry, and a prerequisite for undisturbed healing and secondary stability.

Elevation of the maxillary sinus membrane to create space for bone graft beneath it, performed via a lateral window or crestal approach to gain vertical bone height for posterior maxillary implants.

Clinical decision-making that integrates the best available research evidence, clinician expertise, and patient values, using structured appraisal of study validity and applicability.

A prospective study allocating participants randomly to interventions to minimise selection bias and support causal inference, forming the strongest single-study design for treatment comparisons.

A structured, protocol-driven synthesis of all relevant studies addressing a focused question, with explicit search, quality appraisal, and often meta-analysis to produce pooled estimates.

Voluntary authorisation by a competent patient after disclosure of diagnosis, proposed treatment, alternatives, material risks, and consequences of refusal, documented before any procedure.