2016 Glossary - 52
pathogenic occlusion n: an abnormal occlusal relationship with the potential to produce pathologic
changes in the masticatory system.
pathognomonic n: a specific characteristic or symptom of a disease that predictably leads to the diagnosis of the disease.
pathosis n: the current state of being with disease.
pedicle n: a narrow base resembling a stalk or stem
that connects tissues (eg, vertebrae) to each other;
forms the base of tumors; in dentistry, pedicles are
used in grafting procedures. See also pedicle graft.
pedicle graft n: a flap of skin in which viability is maintained by a vascularized donor stem. In dentistry,
these flaps, while still attached at one end, are used
to cover exposed root surfaces.
peg lateral n: a permanent maxillary lateral incisor that
is tapered and small. Commonly referred to as a baby
tooth or baby teeth.
pellucid adj: allowing for the passage of light without
pemphigoid n: a rare autoimmune disease that is characterized by skin rashes and blistering on the arms,
legs, abdomen, eyes, mouth, nose, and vagina.
pemphigus n: a general term referring to a group of
autoimmune diseases that primarily affect the elderly and result in severe, deep blistering of the skin and
Peptostreptococcus spp n: anaerobic, gram-positive
cocci that infect the whole body including soft tissues. In dentistry, these organisms can invade the
subgingival flora leading to infection and slow recovery times.
perceived color n: description of color based on various attributes (eg, names of colors) or based on the
senses (eg, smell, touch, sound).
percussion n: to strike objects to produce a sound;
in dentistry, tapping with fingers or with a medical
device on oral structures can allow for diagnoses regarding the state of inflammation, disease onset, or
progression or healing.
periapical adj: of or relating to tissues that surround
the apex or root (root tip) of a tooth; may include the
periodontal ligament or alveolar bone.
pericoronal abscess n: a pus-producing lesion that
forms above the crown of a partially erupted tooth.
peri-implantitis n: inflammation of the soft tissues
that surround an osseointegrated implant that results in bone loss.
peri-implant mucositis n: inflammation of the mucosa that surrounds an osseointegrated implant that
has no bone loss.
perimolysis n: erosion of the teeth due to chronic gastric regurgitation of stomach acid.
periodontal adj: pertaining to or occurring around a
periodontal abscess n: pus-producing infection of
any periodontal tissue that usually involves the bone
and soft tissue surrounding a tooth.
periodontal fiber n: see under fiber.
periodontal intrabony pocket n: a periodontal pocket distinguished by its extension into an intrabony
periodontalgia n: pain associated with the periodontal structures.
periodontitis n: inflammation of the supportive tissues of the teeth that is a progressively destructive
disease leading to the loss of associated bone and
periodontal ligament support. A progression of inflammation from the surrounding gingiva into the
bone and ligament that supports the affected tooth
* adult periodontitis: a rarely used term. In general, patients previously classified as having adult
periodontitis are now included under the chronic
* aggressive periodontitis: a specific type of periodontitis with unmistakably identifiable clinical
and laboratory findings that make it sufficiently different from chronic periodontitis so as to
warrant a separate classification. Aggressive periodontitis occurs in patients who are otherwise
clinical healthy (except for periodontal disease).
Usual features include rapid attachment loss and
bone destruction. Patients with aggressive periodontitis generally exhibit amounts of microbial
plaque that are inconsistent with the severity of