The mandibular second premolar is the tooth located distally (away from the midline of the face) from both the mandibular first premolars of the mouth but mesial (toward the midline of the face) from both mandibular first molars.
The treatment options are usually different for a mandibular second premolar compared with a maxillary lateral incisor. A congenital missing mandibular second premolar most often has a deciduous second molar. When the patient is 5 to 6 years old, the deciduous second molar may be extracted.
The patient’s chief complaint was a fractured amalgam restoration on the mandibular right second premolar, i.e. tooth #45 (Figure 1A). The medical history was noncontributory. Clinical examination revealed a defective amalgam filling with missing coronal seal in the right mandibular second premolar and first molar (#45 and #46).
About three-quarters of second premolars have no discernible buccal developmental depressions. When buccal developmental depressions are present, the distal depression is more likely to be deeper, which is the reverse of the mandibular first premolar. This pattern, however, is the same as the maxillary premolars.
Mandibular First Premolar. Figures 10-1 through 10-12 illustrate the mandibular first premolar from all aspects. The mandibular first premolar is the fourth tooth from the median line and the first posterior tooth in the mandible. This tooth is situated between the canine and second premolar and has some characteristics common to each of them.
To present a unique case of mandibular second premolar with an atypical canal pattern. Thorough knowledge of root canal morphology, appropriate assessment of the pulp chamber floor, and critical interpretation of radiographs are a prerequisite for successful root canal treatment.
Mandibular Second Premolar Very similar coronally to the first premolar, the mandibular second premolar presents less of a radicular problem. Its crown has a well-developed buccal cusp and a much better-formed lingual cusp than in the first premolar.
Occlusal Aspect Of MandibularOcclusal Aspect Of Mandibular Second PremolarSecond Premolar 1. Outline - Two-cusp version: – There is slightly more bulk in the mesial half buccolingually than in the distal half 40. Occlusal Aspect Of MandibularOcclusal Aspect Of Mandibular Second PremolarSecond Premolar 2.
The mandibular first premolar is the tooth located laterally (away from the midline of the face) from both the mandibular canines of the mouth but mesial (toward the midline of the face) from both mandibular second premolars.
In human dentition, however, mandibular premolars show variation from one to three in the number of cusps. Thus the use of the term bicuspid is discouraged in favor of the term premolar. The maxillary first and second premolars and the mandibular first premolars are developed from four lobes just like the anterior teeth.