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Joshua Moshonov

Publications and source records attributed to Joshua Moshonov.

9 recordsLinked to original sources
PubMed2006

Retrieval of amalgam from the root canal space.

Removal of foreign objects from the root canal can be very frustrating. The use of a variety of instruments and techniques has been suggested for the retrieval of obstacles from root canals during endodontic treatment. This article describes a method for retrieving a large mass of amalgam restoration that was wedged into the root canal. The amalgam, which had served as the provisional restorative material during apexification of an immature ante rior tooth, was inadvertently pushed into the root canal. After the mass was bypassed, the amalgam was loosened with the aid of copious irrigation, chelation, and flotation. Hedstrom files twisted around the object allowed sufficient grip for its retrieval, enabling completion of the root canal treatment.

Calcium Compounds↗
PubMed2005

The effect of the distance between post and residual gutta-percha on the clinical outcome of endodontic treatment.

To determine whether the distance between the post and the residual gutta-percha influences the clinical outcome of endodontic treatment, 94 endodontically treated teeth following post and core restoration were evaluated radiographically. The teeth were divided into three groups: (I) no gap between the gutta-percha and the post; (II) a gap of >0 to 2 mm; (III) a gap of >2 mm. Treatment outcome was evaluated in follow-up radiographs, taken 1 yr after treatment and up to 5 yr posttreatment. In group I, 83.3% of the teeth were evaluated normal, 53.6% of group II, and only 29.4% of group III. A gap between the gutta-percha and the post was related to an increased rate of emerged disease in endodontically treated teeth restored with a post and core.

Adult↗
PubMed2004

Chemical analysis and surface morphology of enamel and dentin following 9.6mu CO2 laser irradiation versus high speed drilling.

OBJECTIVES: The purpose of the present in vitro study was to determine whether there is a change in the chemical composition and surface morphology of enamel and dentin following 9.6mu CO2 laser irradiation and high-speed drilling. MATERIALS AND METHODS: Ten permanent, non-carious, young premolars, extracted for orthodontic reasons, were selected. The crowns were separated longitudinally into two equal parts at their mesiodistal axis. Two areas on the inner enamel surface of each specimen and two on the dentinal surface were selected. A high-speed drill and 9.6mu CO2 laser irradiation were applied to the selected enamel and dentinal areas. A random area on the unlased enamel and on the unlased dentin of each specimen served as controls. The morphology of the specimens was evaluated using scanning electron microscopy. Calcium, phosphorus and oxygen levels were measured using an energy dispersive spectrometer. RESULTS: Mineral analysis revealed no significant difference in the mineral content of the enamel and dentin after laser irradiation or high speed drilling versus the control. Use of the high-speed drill on enamel and dentin resulted in very clear cavity margins, with characteristic grooves, whereas laser irradiation of enamel and dentin did not produce clear margins and the floor of the cavity displayed an irregular surface. CONCLUSIONS: The 9.6mu CO2 laser appears to be a promising tool in the clinical setting. However, further investigation is indicated to ensure maximum effectiveness.

Analysis of Variance↗
PubMed2004

Lasers in endodontics.

With the rapid development of laser technology, new lasers with a wide range of characteristics are now available and being used in various fields of dentistry. In the past two decades, much experience and knowledge has been gained. This article provides an overview of the current and possible future clinical applications of lasers in endodontics, including their use in alleviating dentinal hypersensitivity, modification of the dentin structure, pulp diagnosis, pulp capping and pulpotomy, cleaning and shaping of the root canal system, and endodontic surgery. Endodontic procedures for which conventional treatments cannot provide comparable results or are less effective are emphasized.

Dental Pulp Diseases↗
PubMed2004

Cleaning of the root canal using Nd:YAP laser and its effect on the mineral content of the dentin.

OBJECTIVE: To compare the efficacy of root canal cleanliness with and without Nd:YAP laser and to assess the effect of the laser on the mineral content of the dentin. BACKGROUND DATA: A high degree of cleanliness of the canal when using Nd:YAG laser has been shown while the laser had been in contact with the canal wall. A new Nd:YAP laser has been studied recently, which is considered to be superior to Nd:YAG with regard to antibactericidal ability due to its 1.34-mu wavelength, which is in the infra red range. This wavelength is absorbed better in water that of Nd:YAG. MATERIALS AND METHODS: Fourteen extracted single rooted premplars were divided into two groups. In group 1, canals were cleaned, instrumented and shaped with K files. In group 2, initial preparation was done using K files and completed with a Nd:YAP laser. Teeth were then split longitudinally and submitted to SEM. RESULTS: The cleanliness of the laser treated teeth was significantly greater than teeth treated with K files alone (p<0.05). No difference in Ca and P content was detected when the use of K files was compared to the use of laser. CONCLUSIONS: It appears that Nd:YAP laser improves the cleanliness of the root canal. However, since Nd:YAP laser serves as an addition to K files, its clinical value for replacing conventional root canal instrumentation remains to be determined.

Calcium↗
PubMed2004

Pulp canal obliteration in an unerupted permanent incisor following trauma to its primary predecessor: a case report.

Trauma to a primary tooth may result in damage to the underlying developing permanent tooth bud because of the close proximity between the root of the primary tooth and its permanent successor. We report an unusual case where injury to the primary dentition resulted in pulp canal obliteration (PCO) of a permanent maxillary central incisor prior to its eruption. The other permanent maxillary central incisor was diagnosed as malformed because of trauma to the primary dentition at an earlier age. The occurrences of PCO or crown malformation dose not routinely disrupt the eruption of those teeth. Periodic assessment is required to determine the need for endodontic intervention.

Child↗
PubMed2003

Cleaning of the root canal using Nd:YAP laser and its effect on the mineral content of the dentin.

OBJECTIVE: The aim of this study was to compare the efficacy of root canal cleanliness with and without Nd:YAP laser and to assess the effect of the laser on the mineral content of the dentin. BACKGROUND DATA: A high degree of cleanliness of the canal when using the Nd:YAG laser has been shown while the laser is in contact with the canal wall. A new Nd:YAP laser has been studied recently, which is considered to be superior to the Nd:YAG with regard to antibactericidal ability due to its 1.34 micro m wavelength, which is in the infra-red range. This wavelength is absorbed better in water than that of Nd:YAG. MATERIALS AND METHODS: Fourteen extracted single rooted premplars were divided into two groups. In group 1, canals were cleaned, instrumented, and shaped with K files. In group 2, initial preparation was done using K files and completed with a Nd:YAP laser. Teeth were then split longitudinally and submitted to scanning electron microscopy. RESULTS: The cleanliness of the laser-treated teeth was significantly greater than teeth treated with K files alone (p < 0.05). No difference in Ca and P content was detected when the use of K files was compared to the use of laser. CONCLUSION: It appears that the Nd:YAP laser improves the cleanliness of the root canal. However, since the Nd:YAP laser serves as an addition to K files, its clinical value for replacing conventional root canal instrumentation remains to be determined.

Calcium↗
PubMed2003

The use of lasers in dentistry: principles of operation and clinical applications.

This article describes the principles of laser operation and the clinical application of laser technology in the different fields of dentistry. It discusses the use of the Er:YAG laser in restorative dentistry, pediatric dentistry, and periodontics, as well as the introduction of a new side-firing spiral tip for efficient cleaning of the root canal system by means of lateral laser irradiation. Although the Er:YAG laser is used mostly on enamel and dentin, the gingival depigmentation procedure using this laser also is described. Clinical applications of the CO2 and diode lasers on soft tissues, particularly in the fields of oral and maxillofacial surgery and perodontics, are explained. Because teeth whitening for esthetic reasons has gained increasing popularity in dentistry, the application of diode lasers for this purpose is discussed. All the dental laser procedures described in this article are conducted at the Hebrew University-Hadassah School of Dental Medicine and are further investigated in various clinical research projects.

Child↗