Rubber Base Impression
A dental impression made using elastomeric materials such as polyvinyl siloxane or polyether to produce an accurate negative replica of oral structures.
Operculum
The flap of gingival tissue covering the crown of a partially erupted tooth, which may become inflamed, traumatised, or...
OPG
Abbreviation for orthopantomogram, a panoramic dental radiograph providing a two-dimensional view of the entire dentitio...
Osseointegration
The direct structural and functional bond between living bone and the surface of a load-bearing implant.
Overbite
The vertical overlap of the upper central incisors over the lower central incisors, measured in millimetres or as a perc...
Overjet
The horizontal distance between the labial surface of the upper central incisors and the labial surface of the lower cen...
Palmer Notation
A tooth numbering system using a quadrant grid symbol and a number (or letter for primary teeth) to identify individual...
Peri-implantitis
An inflammatory condition affecting both the soft and hard tissues surrounding an osseointegrated dental implant, result...
Periapical
Relating to the tissues and bone immediately surrounding the apex (tip) of a tooth root.
Pericoronitis
Inflammation of the soft tissue overlying a partially erupted tooth, most commonly affecting mandibular third molars, ca...
Periodontal Ligament
The fibrous connective tissue that suspends the tooth root within the alveolar socket, absorbing occlusal forces and mai...
Periodontium
The collective term for the supporting tissues of the tooth, comprising the gingiva, periodontal ligament, cementum, and...
Pontic
The artificial tooth component of a fixed dental bridge that spans the edentulous space and is supported by retainer cro...
Pontic Design
The specification of the shape and tissue-contact form of the artificial tooth (pontic) that replaces a missing tooth in...
Probing Depth
The distance in millimetres from the gingival margin to the base of the periodontal pocket, measured with a calibrated p...
Provisionalization
The fabrication and placement of a temporary restoration to protect the prepared tooth and soft tissues while a definiti...
Pulpitis
Inflammation of the dental pulp, classified as reversible or irreversible based on symptom severity and pulpal vitality.
Radiolucency
A dark area on a dental radiograph representing structures that allow X-rays to pass through, typically indicating low-d...
Radiopacity
A bright white area on a dental radiograph representing structures that absorb or block X-rays, such as enamel, metallic...
Retromolar Pad
The pear-shaped fibrous pad of soft tissue located distal to the last molar in the lower arch, used as a landmark for de...
Rubber Base Impression
A dental impression made using elastomeric materials such as polyvinyl siloxane or polyether to produce an accurate nega...
Rubber Dam
A thin sheet of latex or non-latex material used to isolate one or more teeth from the oral environment during dental pr...
Sialolith
A calcified concretion (salivary stone) forming within a salivary gland or its duct, commonly causing obstruction and sw...
Silver Diamine Fluoride
A topical antimicrobial liquid containing silver ions and fluoride, applied to carious lesions to arrest decay and desen...
Sinus Lift
A surgical procedure that augments bone volume in the posterior maxilla by elevating the Schneiderian membrane and placi...