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At least 541 records · Page 30Linked to original sources
PubMed1999

[Pitfalls to avoid in the cleaning and shaping of the pulp canal].

Chemomechanical instrumentation of the root canal system is without doubt the most important but most challenging part of endodontic treatment. The first essential in cleaning and shaping is gaining direct access to the root canals. A properly prepared endodontic access opening can eliminate many of the technical problems encountered in root canal treatment. Excessive calcification in the root canal system and performing root canal treatment through existing artificial crowns however can be a challenge for the clinician. Secondly, enlargement of a curved root canal often results in loss of working length, incomplete removal or extrusion of the root canal content and unwanted alterations in the canal shape, such as transportation (stripping, zipping, elbow formation), ledge formation and perforation. This article focuses on the causes and effects of procedural errors during root canal cleaning and shaping. Each of these complications is addressed in a manner designed to prevent problems rather than to manage them once they are recognized. Throughout the immense amount of literature published the last 30 years on this topic, concensus is obtained concerning the preferential procedure of cleaning and shaping the root canal.

Crowns↗
PubMed1992

[Approach to pulpal and pulpo-periodontal lesions of the temporary teeth using therapeutic endodontics].

The anatomical and physiological properties of deciduous teeth make them susceptible to caries and inflammatory and infectious complications. This specificity, the proximity of the germ of the underlaying permanent tooth, and the relation of the last one to the deciduous tooth, make delicate its conservation by endodontal therapeutics after a pulpal or pulpo-periodontal affection. The success of this attempt is related to a good case-selection, based on the general condition of the child, his and his parents motivation, the condition of cariogenicity of the mouth, the analysis of the unity deciduous tooth/germ of the underlaying permanent tooth, the follow-up of the case. A success spares young children extraction of the deciduous teeth before the physiological period of permutation.

Child↗
PubMed2003

[Comparative study of hand-held nickel-titanium dental instruments based on the shape of the prepared root canal].

The aim of this study was to compare the shaping characteristics of two hand instruments: the NiTi K-files and the NiTi S-files. A total of 60 extracted human roots were embedded in resin blocks. The roots were divided into three groups according to their shape: straight, apically curved and entirely curved. Each of the three groups was divided into two subgroups for the NiTi K-file and the NiTi S-file instrumentation. The files were used with a step-back technique and enlarged so that the master apical file was size 30, and the canals were stepped back to size 40. The performance of the files was assessed by the superimposition of projected radiographs taken in bucco-lingual and mesio-distal views before and after preparation. The results were analyzed statistically using of analysis of covariance and Duncan's multiple range test. Although canal preparation using NiTi K-files was quicker, there were no statistically significant differences between file types. The NiTi S-file removed significantly more dentine at the most coronal level (p < 0.05). There were minor differences between instruments at the apical level. Only in the proximal view of apically curved canals prepared with NiTi S-files was significantly more dentine removed from the convex side of the wall (p < 0.05). At the middle level the NiTi S-files removed more dentine from the concave wall in apically curved canals. Under the conditions of this study, preparation with NiTi K-files produced more appropriate shapes in roots with apically curved canals than NiTi S-files.

Dental Instruments↗
PubMed2005

[Root canal preparation: shaping and cleaning of the root canal].

Primary shaping is of paramount importance for a succesfull root canal treatment. In this article the basis principles of apical terminus location, shape, size and diameter are discussed. The use of NiTi instruments and crown-down preparation techniques are explained.

Dental Instruments↗
PubMedDate not supplied

Quality of anesthesia for the maxillary primary anterior segment in pediatric patients: comparison of the P-ASA nerve block using CompuMed delivery system vs traditional supraperiosteal injections.

PURPOSE: The purpose of this study was to compare the quality of 2 injection techniques to anesthetize the maxillary primary anterior segment by applying either the palatal approach anterior superior alveolar nerve block (P-ASA) utilizing a computer-controlled injection device (CompuMed with the Wand handpiece) or traditional multiple supraperiosteal (TMS) injections with a hand-operated syringe. Depth and duration of anesthesia was assessed by the number of disruptive behaviors 20 minutes following injection. METHODS: Twenty-one preschoolers aged 3 to 5 years, who required pulp tissue removal with subsequent crown placement and/or extraction of at least 2 teeth in the maxillary incisor segment on opposite sides of the midline, participated in this study. They were randomly assigned to either the P-ASA or the TMS injection group. The procedure was separated into 3 segments: (1) the injection; (2) overall procedure; and (3) painful event. Each segment was scored for disruptive behaviors (body movements, crying, restraint, or dentist interference) using an established scale. Scores were analyzed via analysis of variance for significance. RESULTS: During injection, disruptive behaviors occurred significantly less in the P-ASA group than in the TMS group. No significant differences were found between the 2 groups for the overall procedure and the painful event segments. CONCLUSION: Whereas anesthetic solution delivery with CompuMed system caused significantly less disruptive behavior during the injection phase, both methods seem to provide a comparable quality of anesthesia for the maxillary primary incisor segment 20 minutes after deposition of the anesthetic solution.

Analysis of Variance↗
PubMed2006

[Decoronation: indications and treatment timing].

Dental trauma in children is a frequent event and may involve functional, esthetic and orthodontic complications. Replacement resorption and ankylosis are frequently diagnosed following avulsion and replantation, severe intrusive luxation, and less frequently as a consequence of lateral luxations and root fractures. The optimal treatment for an ankylotic permanent incisor is yet to be found. The treatment of ankylosis and replacement resorption of a permanent incisor following dental trauma is further complicated when it involves a growing child. It is often associated with increasing infraposition of the tooth, retarded growth of the alveolar bone and tilting of adjacent teeth. To avoid such complications an ankylosed tooth should be removed before they changes become so pronounced that they necessitate orthodontic intervention and compromise future prosthetic treatment. The purpose of this article is to review the literature dealing with the considerations involved in the treatment of a permanent incisor diagnosed with replacement resorption and ankylosis. Different treatment options are considered. Decoronation is described and discussed.

Alveolar Bone Loss↗
PubMed1991

A preliminary report: YAG laser treatment in pediatric dentistry.

Pediatric dentistry offers many opportunities to employ lasers. Observations of laser uses with the primary dentition and evaluation of laser anesthesia for permanent premolars are presented in this preliminary report. Soft tissue surgery with children and adolescents is described. Dentin became desensitized with normal pulp test readings and histology when premolars were given laser exposure. Patient acceptance was high. Enamel conditioning for bonding, decay removal, root canal cleansing and exposing unerupted teeth are the most common procedures.

Anesthesia, Dental↗