EHPLE Dental Medicine key terms

A finely pitted, orange-peel surface texture of attached gingiva produced by the underlying connective tissue papillae interdigitating with epithelial rete ridges. Loss of stippling may indicate gingival inflammation or edema.

The portion of gingiva extending from the base of the gingival sulcus to the mucogingival junction, tightly bound to underlying periosteum and bone. Its width varies by region and influences resistance to functional and inflammatory trauma.

The clinically visible boundary where attached gingiva meets alveolar mucosa, marked by a color change from pale pink to darker red. It is identified by the rolling test and serves as a landmark for grafting and flap design.

The shallow V-shaped space between the tooth surface and the free gingival margin, bounded by sulcular epithelium. Clinically probed depth in health is generally 1 to 3 mm, though histologic depth is shallower.

A thin, nonkeratinized epithelial layer attaching the gingiva to the tooth surface via hemidesmosomes and internal basal lamina. It forms the epithelial seal and migrates apically when attachment is lost in periodontitis.

The distance from the cementoenamel junction to the base of the periodontal pocket, reflecting cumulative attachment loss. It is more reliable than probing depth alone because it accounts for gingival margin position and recession.

A pathologically deepened gingival sulcus resulting from apical migration of the junctional epithelium and attachment loss. It is classified as suprabony or infrabony depending on the relationship of the pocket base to alveolar crest.

An autogenous graft of keratinized mucosa harvested, typically from the palate, and sutured to a recipient bed to increase attached gingiva width or deepen the vestibule. Healing depends on plasmatic circulation from the recipient bed initially.

Direct structural and functional connection between living bone and the surface of a load-bearing implant without intervening fibrous tissue. It is assessed clinically by absence of mobility and radiographically by stable marginal bone levels.

An inflammatory condition affecting tissues around an osseointegrated implant, characterized by bleeding on probing, suppuration, and progressive marginal bone loss beyond initial remodeling. It differs from peri-implant mucositis, which is reversible and limited to soft tissue.

A prosthodontic guideline stating that the total root surface area of abutment teeth supporting a fixed partial denture should equal or exceed that of the teeth being replaced. It is a planning heuristic rather than an absolute rule.

A tooth, root, or implant that supports and retains a fixed or removable prosthesis. Its selection depends on periodontal support, crown-root ratio, angulation, and the design of the planned restoration.

The vertical relationship of the maxilla and mandible when the teeth or occlusion rims are in contact. It guides complete denture fabrication and is evaluated at rest and in function to avoid over- or under-closure.

The difference between the vertical dimension at rest and the occlusal vertical dimension, typically 2 to 4 mm at the incisors. It provides clearance for speech and comfort in complete denture wearers.

A maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their discs, in the anterior-superior position against the articular eminences. It is a reproducible reference position independent of tooth contact.

The bilateral synovial joint between the mandibular condyle, articular disc, and temporal bone, allowing both rotation and translation. Its unique fibrocartilaginous surfaces and disc permit complex jaw movements during mastication and speech.

A muscle of mastication with superior and inferior heads that protrudes the mandible and assists in opening and lateral excursion. Its inferior head is often implicated in anterior disc displacement of the temporomandibular joint.

The fifth cranial nerve, providing sensory innervation to the face and motor supply to the muscles of mastication. Its three divisions are ophthalmic, maxillary, and mandibular, with the mandibular division also carrying motor fibers.

A branch of the mandibular division of the trigeminal nerve that runs within the mandibular canal, supplying sensation to mandibular teeth and chin. Its position is critical for surgical and implant planning to avoid neurosensory injury.

A regional anesthesia technique depositing local anesthetic near the mandibular foramen to anesthetize mandibular teeth, lower lip, and chin on one side. Success depends on accurate landmarking and adequate diffusion to the nerve.

Adverse systemic effects from excessive plasma concentrations of local anesthetic, presenting with tinnitus, metallic taste, perioral numbness, seizures, and cardiovascular depression. Prevention includes dose calculation by body weight and aspiration before injection.

A vasoconstrictor added to local anesthetics to reduce systemic absorption, prolong anesthesia, and improve hemostasis. It is used cautiously in patients with significant cardiovascular disease due to its adrenergic effects.

Inflammation of the dental pulp, classified as reversible or irreversible based on duration and provocation of pain. Irreversible pulpitis typically requires root canal treatment or extraction, while reversible cases may resolve with restorative care.

Inflammation of the periapical tissues, usually resulting from pulpal infection and necrosis. It presents as percussion tenderness and may progress to apical abscess or radiolucency, requiring endodontic or surgical management.

The distance from a coronal reference point to the apical constriction or desired apical limit of instrumentation. Accurate determination prevents under- or over-instrumentation and supports predictable periapical healing.

A structured evaluation of factors that predict future caries development, including diet, fluoride exposure, saliva flow, bacterial load, and past caries experience. It guides preventive and restorative treatment intensity for individual patients.

A multifactorial, biofilm-mediated, diet-modulated disease causing demineralization of dental hard tissues. It progresses from subsurface enamel lesions to cavitation and pulpal involvement if not managed preventively or restoratively.

A high-concentration topical fluoride preparation applied to tooth surfaces to enhance remineralization and inhibit demineralization. It is used professionally for caries prevention in children and high-risk adults.

A three-dimensional imaging modality using a cone-shaped X-ray beam and flat-panel detector to produce volumetric data of the maxillofacial region. It offers high spatial resolution for implant planning, endodontics, and airway assessment at lower dose than medical CT.

A late complication of head and neck radiotherapy in which irradiated bone becomes necrotic and fails to heal, often after minor trauma or extraction. Management includes conservative care, antibiotics, and hyperbaric oxygen in selected cases.

A surgical procedure that augments deficient alveolar bone using autogenous, allogeneic, xenogeneic, or synthetic graft materials. It is performed before implant placement or to reconstruct cleft defects and restore ridge contour.

Surgical correction of dentofacial deformities through osteotomies of the maxilla, mandible, or both, often combined with orthodontic treatment. It aims to improve function, facial esthetics, and airway, with treatment planning based on cephalometric and imaging data.

A standardized method of measuring craniofacial relationships on lateral radiographs using angular and linear parameters. It supports diagnosis, growth assessment, and surgical or orthodontic treatment planning.

A sagittal jaw relationship in which the maxilla is positioned anteriorly relative to the mandible. It may result from maxillary prognathism, mandibular retrognathism, or both, and influences orthodontic and surgical planning.

Removal of the coronal portion of an inflamed pulp while preserving radicular pulp vitality, commonly performed in primary molars. It aims to relieve pain and maintain the tooth until exfoliation.

A prefabricated metal crown used to restore severely damaged primary or permanent teeth, offering durability and full coverage. It is a common pediatric dentistry option for teeth after pulpotomy or with extensive caries.

The process of obtaining a patient's voluntary agreement to treatment after disclosing diagnosis, proposed procedures, alternatives, risks, and expected outcomes. It is an ethical and legal requirement that supports patient autonomy in dental practice.

The ethical principle recognizing a patient's right to make informed decisions about their own care, including the right to refuse treatment. It underpins informed consent and confidentiality in dental practice.

A legal and ethical obligation of a clinician to provide treatment to an accepted standard and to avoid foreseeable harm. Breach of this duty, if it causes injury, may support a claim of professional negligence.