Lebanon Dental Colloquium key terms

A clinical term for oral mucosal lesions or conditions that carry an increased risk of developing into squamous cell carcinoma, such as leukoplakia, erythroplakia, oral submucous fibrosis, and proliferative verrucous leukoplakia. Diagnosis requires biopsy and histopathological assessment.

A predominantly white patch or plaque on the oral mucosa that cannot be clinically or pathologically classified as any other definable lesion. It is a diagnosis of exclusion and requires biopsy to rule out dysplasia or malignancy.

A fiery red patch on the oral mucosa that cannot be attributed to any other definable lesion. It has a high risk of dysplasia or carcinoma in situ and mandates immediate biopsy and specialist referral.

Histopathological changes in the oral epithelium indicating disordered maturation and cellular atypia, graded as mild, moderate, or severe. It is a marker of increased malignant transformation risk and guides management and follow-up.

A chronic, progressive condition characterized by juxta-epithelial fibrosis, leading to mucosal rigidity, restricted mouth opening, and burning sensation. It is strongly associated with areca nut chewing and has a significant malignant transformation risk.

Inflammation of the tissues around the root apex, usually caused by bacterial infection from a necrotic pulp. It may be acute or chronic and presents as apical radiolucency, pain, or tenderness to percussion.

Death of the dental pulp tissue, often following irreversible pulpitis or trauma, leading to loss of vitality and potential periapical infection. Diagnosis is confirmed by absence of response to pulp sensibility testing.

A clinical diagnosis of pulp inflammation that cannot heal and requires root canal treatment or extraction. It is characterized by spontaneous, lingering pain, often triggered by thermal stimuli and poorly localized.

Mild inflammation of the pulp that is capable of healing once the irritant is removed. It causes sharp, transient pain provoked by stimuli such as cold or sweet, with no spontaneous pain.

A dental procedure involving removal of infected or inflamed pulp tissue, cleaning and shaping of the root canal system, and obturation with a filling material to prevent reinfection and preserve the tooth.

The distance from a coronal reference point to the apical constriction or desired apical limit of instrumentation during root canal treatment. Accurate determination prevents over- or under-instrumentation and helps avoid apical damage.

The narrowest part of the root canal near the apical foramen, often considered the ideal apical termination point for instrumentation and obturation. It marks the transition between the canal and the periapical tissues.

The opening at the root apex through which the pulp canal communicates with the periapical tissues. Its size and position vary and influence working length determination and obturation.

An electronic device used to determine working length by measuring electrical impedance changes between the root canal and the periodontal ligament. It aids in locating the apical constriction, especially when radiographs are inconclusive.

A short, sharp pain arising from exposed dentin in response to thermal, evaporative, tactile, osmotic, or chemical stimuli that cannot be ascribed to any other dental defect or pathology. It is often managed with desensitizing agents.

A microcrystalline layer of debris and organic material formed on dentin surfaces after instrumentation. In endodontics, its removal improves disinfection and sealer adaptation; in operative dentistry, it affects bonding and permeability.

Apical displacement of the gingival margin beyond the cementoenamel junction, exposing the root surface. It may result from periodontal disease, trauma, or thin biotype and can lead to hypersensitivity and esthetic concerns.

Destruction of the periodontal ligament and alveolar bone supporting the tooth, measured clinically as the distance from the cementoenamel junction to the base of the pocket. It is a hallmark of periodontitis.

A pathologically deepened gingival sulcus, defined as a probing depth greater than 3 mm, resulting from apical migration of the junctional epithelium and attachment loss. It is a key diagnostic feature of periodontitis.

The distance from the cementoenamel junction to the base of the periodontal pocket, representing the cumulative loss of periodontal support. It is a more reliable indicator of disease severity than probing depth alone.

The distance from the gingival margin to the base of the periodontal pocket, measured with a periodontal probe. It is used to assess pocket depth but must be interpreted alongside clinical attachment level and bleeding on probing.

A clinical sign of gingival inflammation detected when a periodontal probe is inserted into the sulcus or pocket. Its absence is a strong predictor of periodontal stability, while persistent bleeding indicates active inflammation.

The direct structural and functional connection between living bone and the surface of a load-bearing dental implant, without intervening soft tissue. It is the biological basis for implant stability and long-term success.

An inflammatory condition affecting the tissues around a dental implant, characterized by bleeding on probing, increased probing depth, and progressive bone loss. It differs from peri-implant mucositis, which is reversible and limited to soft tissue.

Reversible inflammation of the soft tissues surrounding a dental implant, without bone loss. It is analogous to gingivitis and is managed by improving oral hygiene and professional maintenance.

A numerical value derived from resonance frequency analysis that reflects the stability of a dental implant in bone. Higher values indicate greater stability and are used to guide loading protocols.

The component that connects the implant fixture to the prosthetic restoration. It can be prefabricated or custom-made and influences soft tissue contour, retention, and biomechanical load distribution.

The junction between a dental restoration and the prepared tooth structure. Its fit, location, and finish influence plaque accumulation, periodontal health, and restoration longevity.

The prepared contour at the margin of a tooth preparation that defines the edge of the restoration. Common types include chamfer, shoulder, and knife-edge, each affecting fit and stress distribution.

The accuracy of adaptation between a restoration and the tooth at the margin. Poor marginal fit can lead to microleakage, plaque retention, and failure of the restoration.

The passage of bacteria, fluids, or ions between a restoration and the tooth surface. It can cause postoperative sensitivity, recurrent caries, and pulpal inflammation.

Restricted ability to open the mouth, often due to muscle spasm, inflammation, fibrosis, or mechanical interference. It can complicate dental treatment and is a common finding in oral submucous fibrosis and after surgery.

A group of conditions affecting the temporomandibular joint and masticatory muscles, causing pain, limited opening, and joint sounds. Diagnosis involves history, clinical examination, and sometimes imaging.

Involuntary grinding or clenching of the teeth, which can occur during sleep or wakefulness. It may lead to tooth wear, muscle pain, temporomandibular disorders, and restorative complications.

A removable appliance, usually made of hard acrylic, that covers the occlusal surfaces of teeth to protect them from wear and reduce the effects of bruxism. It can also be used for diagnosing or treating temporomandibular disorders.

Loss of tooth substance due to tooth-to-tooth contact, such as from mastication or bruxism. It typically presents as flattened wear facets on occlusal surfaces and may require restorative management.

Irreversible loss of dental hard tissue caused by chemical dissolution, often from dietary acids or gastric reflux. It differs from attrition, which is mechanical, and can lead to dentin exposure and hypersensitivity.

A dental local anesthetic technique that targets the inferior alveolar nerve near the mandibular foramen to anesthetize the mandibular teeth and associated soft tissues on one side. It is commonly used for mandibular procedures.

Reversible loss of sensation in a specific area of the body induced by drugs that block nerve conduction. In dentistry, it is used to prevent pain during procedures and is typically achieved with agents such as lidocaine or articaine.

A substance added to local anesthetic solutions to constrict blood vessels, thereby reducing bleeding and prolonging the anesthetic effect. Epinephrine is the most common example; caution is needed in patients with cardiovascular disease.

An abnormal sensation such as tingling, numbness, or burning, often resulting from nerve injury. In dentistry, it can occur after local anesthesia, surgery, or trauma and may be temporary or permanent.