Permanent Mandibular Left Second Premolar
The permanent mandibular left second premolar (tooth #20) plays a key role in chewing and occlusion. Learn its anatomy, clinical significance, and more.
Dental anatomy is the foundation every clinical decision rests on — knowing where a structure sits, what it does, and how it relates to neighboring tissues. This section of the Rebrief Dental Glossary catalogs the anatomy of the tooth and its supporting structures: enamel, dentin, cementum, and dental pulp inside the tooth itself; the alveolar bone, alveolar process, and alveolar crest of the supporting socket; and the periodontal ligament, gingiva, and gingival sulcus that hold and protect each tooth in place. We cover surface and directional terminology — buccal, lingual, mesial, distal, occlusal — that lets clinicians describe lesions and restorations precisely. You’ll find detailed entries on tooth-specific structures (apical foramen, apical delta, cervical line, cuspal ridge), individual tooth designations across the permanent dentition, and the soft-tissue landmarks that define the periodontium. Each term entry includes a working clinical definition, the anatomical context that matters in practice, and links to related conditions and procedures elsewhere in the glossary. Whether you’re a dental student building a vocabulary, a hygienist refreshing landmarks for a charting course, or a practicing clinician documenting a case, this is a quick reference for the structural terms that show up in records, consults, and patient education materials. Browse alphabetically below or search across the full glossary.
The permanent mandibular left second premolar (tooth #20) plays a key role in chewing and occlusion. Learn its anatomy, clinical significance, and more.
Explore the permanent mandibular left lateral incisor — tooth #23 in the lower arch — its anatomy, eruption timeline, and clinical importance.
The permanent mandibular left first premolar (#21) is a key lower-left bicuspid involved in occlusion, orthodontic extractions, and endodontic treatment.
The permanent mandibular left second molar (tooth #18) is a key force-bearing molar. Learn its anatomy, root structure, and clinical significance.
The permanent mandibular left first molar is the first permanent tooth to erupt and is essential for chewing, occlusion, and long-term arch stability.
The permanent mandibular left canine anchors the lower left arch, guides jaw movement, and is one of the most structurally resilient teeth in the dentition.
The periodontal ligament anchors teeth to alveolar bone, cushions bite forces, and enables orthodontic movement — essential to lasting dental health.
Explore the anatomy, eruption timeline, and clinical significance of the permanent mandibular left central incisor — a key tooth for occlusion and oral health.
The palatal surface is the inner face of maxillary teeth, facing the roof of the mouth. Learn its clinical role in caries, orthodontics, and restorations.
Palatal rugae are unique ridge patterns on the hard palate used in forensic identification, denture design, orthodontics, and speech articulation.