Flashcards
Access preparation
Cards in this deck (15)
- 1Which are the major objectives of access preparation?1. Attainment of straight-line access
2. Conservation of tooth structure
3. Unroofing of the chamber to expose orifices and to remove pulp horns - 2Where do we have to remove dentin and enamel strategically in order to obtain a straight-line access?Dentin is removed internally at or just apical to the canal orifice (dentin or lingual shelf).
Enamel is removed from the incisal surface of anterior teeth (enamel triangle) and toward the crown periphery (cusp tips) on posterior teeth. - 3What is incorrect in this access preparation?The roof hasn't been removed
- 4Which instrument do we use to locate canal orifices? and to confirm them as canals?We locate canal orifices with the endodontic explorer. These are confirmed as canals by penetrating them with small files.
- 5What can we do if we find it difficult to locate a canal?- Delay isolation
- Exploratory radiographs to determine the position of the access preparation in the root. - 6Which instruments do you need to perform the penetration phase?A round diamond bur mounted on high-speed handpiece
- 7When difficulty in locating the chamber is anticipated, a search should be made for the chamber region of greatest dimension. In maxillary and mandibular molars these regions are:Palatal canal region in maxillary molars
Distal canal in mandibular molars - 8When and why will we use a non-end-cutting diamond bur (Batt’s bur)?- Finishing phase of the access preparation.
- To smooth the walls of the access cavity so that the transition between the access cavity and the pulp chamber walls will be imperceptible to probing. - 9The final shape of the cavity opening of an upper central incisor is... And of upper lateral incisors?- Central incisor: triangular
- Lateral incisor: ovoid - 10Which canal does usually remain hidden in lower incisors?The lingual canal.
- 11How must the orientation of the cavity access be in premolars?The orientation must be buccolingual
- 12Where is the orifice of the mesiopalatal canal located in upper molars?The orifice of the “MB2” (mesiopalatal canal) is located on the groove that joins the palatal and mesiobuccal canals at a variable distance from the latter.
- 13If you become misoriented during molar access preparation, how to know whether you have mistaken one canal for another?When in doubt, a file is placed and then an appropriate angled radiograph is made to identify the discovered canal.
- 14fichas repasosoluciones
- 15fichas repasosoluciones
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- Flashcards on Access preparation, created by Mar Jovani on 25/02/2018.
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- Mar Jovani
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