TMJ disorder is an umbrella term for problems affecting the temporomandibular joint (TMJ), the jaw muscles, or both. It commonly describes jaw pain, joint noises (clicking/popping), and difficulty opening or moving the jaw. The TMJ connects the lower jaw (mandible) to the skull and helps with chewing, speaking, and swallowing. Dentists and physicians use the term when evaluating facial pain and jaw-function symptoms that may involve the TMJ system.

ranula is a mucus-filled swelling that most often appears on the floor of the mouth. It is typically related to leakage or blockage of saliva from a salivary gland, most commonly the sublingual gland. ranula is a clinical term used in dentistry, oral surgery, and ear–nose–throat (ENT) settings. People often describe it as a soft, bluish, “bubble-like” lump under the tongue.

A mucocele is a soft, mucus-filled swelling that most often appears on the inner lower lip. It forms when saliva from a minor salivary gland leaks or becomes trapped in nearby tissue. In dentistry and oral medicine, mucocele is a common, usually benign cause of a “bubble-like” oral lump. It is discussed in clinical exams, differential diagnosis, and (when needed) minor oral surgery planning.

A fibroma is a benign (non-cancerous) growth made mostly of fibrous connective tissue. In the mouth, it most often appears as a small, firm bump on the cheek, lips, tongue, or gums. Many oral fibromas are “reactive” lesions linked to repeated irritation, such as cheek biting or rubbing from dental appliances. Dentists commonly recognize fibroma during routine exams and may confirm it with a biopsy when needed.

An odontoma is a benign (non-cancerous) odontogenic lesion made from tooth-forming tissues. It is commonly found in the jaws and is often discovered on dental X-rays taken for delayed tooth eruption. In simple terms, it is a tooth-like growth or a calcified mass that can block a tooth from coming in. The term is used in dentistry, oral surgery, and oral pathology to describe a specific, well-recognized diagnosis.

ameloblastoma is a jaw tumor that develops from odontogenic (tooth-forming) tissues. It is usually considered benign (not a typical cancer), but it can grow into surrounding bone. It most often arises in the mandible (lower jaw), especially toward the back teeth region. The term is commonly used in dentistry, oral surgery, and pathology to describe a specific diagnosis confirmed by biopsy.

A tumor is an abnormal growth of tissue that forms a lump or mass. In dentistry and oral medicine, tumor is used when discussing growths in the mouth, jaws, salivary glands, and nearby structures. A tumor can be benign (not cancer) or malignant (cancer). The term is common in clinical notes, imaging reports, biopsy results, and pathology discussions.

OKC is a term some dental notes and learning materials use to refer to a tooth-colored composite resin restoration or composite material. In everyday language, it is a “white filling” material used to repair or rebuild parts of a tooth. OKC is most commonly discussed in restorative dentistry for small to moderate tooth repairs. Meaning and exact product selection can vary by clinician and case.

keratocystic odontogenic tumor is a jaw lesion that develops from tissues involved in tooth formation. It is characterized by a cyst-like space lined by keratinizing (keratin-producing) epithelium. The term is commonly used in oral pathology reports and oral and maxillofacial surgery discussions. It is also used in teaching to describe a lesion known for local growth and recurrence risk.

A radicular cyst is an inflammatory cyst that forms in the jawbone at the tip of a tooth root. It is usually associated with a tooth that has a non-vital (dead) pulp, often after deep decay or trauma. It is commonly identified on dental X-rays during evaluation of a persistent “dark spot” near a root. The term is used in dentistry, endodontics, oral surgery, and oral pathology to describe a specific type of periapical (around-the-root) lesion.