How do you open access in maxillary first molar?
When making a maxillary molar access opening, the author suggests using a bur with a small cutting diameter and a short, tapering tip, such as a 330 bur, instead of using a fissure bur, which has a wider, flatter cutting tip, and a longer, nontapered cutting length.
How many canals does a maxillary first premolar have?
The maxillary first premolar is the most commonly bi- rooted tooth with occasional presentation of three roots system; it is a transitional tooth between incisors and molars. Although it usually has two canals, it may rarely have three and this third canal can easily be missed.
How many canals are in a maxillary 1st molar?
The most common morphology of the maxillary first molar is three roots and four canals. However, the mesiobuccal root of the maxillary first molar often contains a double root canal system, and the incidence of a second mesiobuccal canal (MB2) has been reported to be between 18.6% and 96.1%.
Which slope is longer in maxillary first premolar?
The mesial slope of premolar is longer than distal which is reverse in case of canine. The premolar is not as wide as canine in the mesiodistal span. Most of maxillary first premolars have 2 roots and 2 root canals. If only one root is present, 2 canals are found anyway.
How many roots does a maxillary first molar have?
The anatomical characteristics of permanent maxillary molars are complex and are generally described as teeth with three roots: Two buccal root canals and one palatal root canal.
How can you tell the difference between the right and left maxillary first premolar?
Maxillary first premolar Two distinctive traits help is distinguishing right and left. -The mesial developmental depression and the mesially displaced lingual cups tips are consistent clues for determining right and left.
What features distinguish the 1st premolars from the 2nd premolars both upper and lower?
While mandibular first premolars develop from four lobes (mesial, distal, buccal, and lingual) just like the anterior teeth and maxillary premolars, mandibular second premolars often develop from five lobes (mesial, buccal, distal, mesiolingual, and distolingual lobes).
How can you tell the difference between maxillary first and second premolar?
Maxillary. The first premolar will normally have two roots; other premolars are single rooted. The first premolar displays sharper, more prominent cusps with the buccal cusp being significantly larger than the palatal cusp; the second premolar has more rounded, shorter cusps that are similar in size and height.
What size maxillary molar root canal opening should a clinician form?
A clinician should form a conservative-sized maxillary molar access opening, [ 1, 2] perhaps following various “laws” of maxillary molar root canal access openings [ 3] to help guide access [ Table 1 ].
What are the basic techniques of maxillary molar endodontic access opening?
This article reviews the basic clinical techniques of performing a maxillary molar endodontic access opening, starting from the initial access opening into the pulp chamber, to the point where a size #10 file has been advanced to the apices of all three or four (or more) canals.
What bur is used for a maxillary molar access?
When making a maxillary molar access opening, the author suggests using a bur with a small cutting diameter and a short, tapering tip, such as a 330 bur, instead of using a fissure bur, which has a wider, flatter cutting tip, and a longer, nontapered cutting length. [ 10]
How many canals does the maxillary second premolar have?
The maxillary second premolar tends to be single-rooted with a single canal (85%), which is wide in a buccolingual direction (Fig. 1.60). The canal configurations are type 1, 2, 3, or 4 in that order, although the last variety may be more common than thought. Where there are two canals they tend to converge apically.