Calcium hydroxide is used in the treatment of different traumatized teeth. New concepts about the effects of calcium hydroxide on vital pulps and immature non vital teeth are developed. Some clinical techniques and their results are described.
Calcium hydroxide is used in the treatment of different traumatized teeth. New concepts about the effects of calcium hydroxide on vital pulps and immature non vital teeth are developed. Some clinical techniques and their results are described.
A method to test the efficiency of traction is developed on bovine bones, according to a mechanical mode. This procedure concern specific dynamics of the M.M.E. as well as the traction components of M.M.C. Profilometric measurement of the volume of material removed with each instrument for a specific number of turns, reflects its cutting efficiency in traction. Lubrification always increases the instruments' cutting power, whether it is provided by water or sodium hypochlorite solution. Loss of the efficiency of an M.M.E. instrument, used clinically, has been estimated at approximately 50%.
The porosity and the leakage properties of 13 temporary fillings used between each appointment during endodontic treatment were investigated by means of thermocycling and dye staining of the interface between the teeth and the filling material. A scanning electron microscope was also used for these observations. The 8 commercially produced temporary fillings seal adequately the cavity whereas the 5 materials prepared and mixed by the practitioner allowed wide staining diffusion and therefore were leaky.
A statistical study has been conducted in order to study the benefit afforded by tactile sense in endodontometry. The study is based on 154 electronic measures (Dentometer, Endoradar, MEO2) and 90 tactiles ones, all radiographically controlled. Results show that: 1. The rate of good electronic measures is, as a whole, the same as tactile ones. 2. The risk of wrong measures is twofold in the case of narrow root canal, necrosis or molar treatment. 3. The risk lessens in the case of a pulpectomy when the electronic measure is associated with a tactile one: 48.38% success instead of 25%, in tactile sense: 48.8 success instead of 56.25%. Evidently, the study bring up to date the tactile perception in endodontometry in the case of pulpectomy.
Medicaments used for reducing or eliminating microorganisms from infected root canals include: irrigating solutions, such as sodium hypochlorite, urea peroxide and hydrogen peroxide, chloramine, iodine-potassium-iodide solution, and chlorhexidine solution. In addition, various intracanal drugs, such as calcium hydroxide and antibiotics, are in use. The characteristics of these drugs are discussed.
The obturation of a prepared canal consisting in molding a gutta-percha cone, in order to spread against the canal wall, the authors tested the malleability of three brands of gutta-percha. The study points out the superiority of the brand "Hygienic", and the different underpressure characteristic related to the speed of compression.
The use of calcium hydroxide in the treatment of traumatic injuries are reviewed in this paper and demonstrated by some clinical cases. The necessity of a proper crown reconstruction is also emphasized as it is impossible to use posts in these treatments.
Through three clinical cases, the authors demonstrate that large lesion do not compromise the teeth. Endodontic surgery could be used as the ultimate solution when classical root canal therapy fails to repair the lesion.
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