Treatment Of External Resorption Research Articles

Lateral Incisor Root Resorption: A Consequence of Ectopic Maxillary Canine Teeth

Root resorption of permanent teeth is a recognized complication of ectopic maxillary permanent canines. This type of resorption is sometimes missed and can be diagnosed at the late presentation stage. Treatment of external resorption is complex and can require extraction of the affected tooth. This review provides an insight into the current evidence and guidance related to the interceptive treatment of displaced permanent maxillary canines to minimize the risk of resorption of adjacent teeth. Supported by two clinical cases, it looks into treatment options and long-term management of lateral incisors with external root resorption of varying severities. CPD/Clinical Relevance: Primary care practitioners are best placed to recognize displaced maxillary permanent canines in a timely manner, and so, root resorption of adjacent teeth may be prevented.

MODERN REPRESENTATIONS ABOUT ETIOLOGY, PATHOGENESIS, AND TREATMENT OF EXTERNAL RESORPTION OF THE TOOTH ROOT

External cervical resorption of the root of the tooth, is asymptomatic and has no characteristic morphological manifestations, to make a reliable diagnosis in most cases is impossible. External inflammatory root resorption is one of the most destructive and aggressive types of pathology. The analysis of domestic and foreign literature and publications. This article highlights the main etiological factors and pathogenesis mechanisms of external resorption of the root. Both local and systemic etiological factors can lead to the development of root resorption. Allocate superficial, inflammatory and replacement external resorption. The modern approaches to the diagnosis and treatment of this disease are considered.

Comparison of pH Changes Induced by Calcium Enriched Mixture and Those of Calcium Hydroxide in Simulated Root Resorption Defects

IntroductionExternal resorption usually occurs after dental trauma and the loss of root cementum. Because it has the ability to induce alkaline pH, calcium hydroxide is used in treatment of external resorption, which is reportedly not free from disadvantages. Driven by such understanding, the aim of this in vitro study was to compare the pH changes induced by calcium enriched mixture (CEM) and those of calcium hydroxide in simulated root resorption defects. MethodsTwenty-one paired extracted human premolars were cut to the length of 14 mm. Root canal preparation was performed by using ProTaper rotary system. Cavities of 0.7-mm depth and 1.4-mm diameter were prepared on the external root surface, 5 mm from the apex. Half of the teeth were filled with CEM and the other half with calcium hydroxide. Five premolars were also assigned as the negative control group and filled with normal saline. To be assured of the filling quality, a radiograph was obtained from each tooth. Subsequently, pH of the cavity was measured with a microelectrode at 20-minute, 3-hour, and 1-, 7-, 14-, 21-, and 28-day intervals after filling. ResultsMean pH in the CEM and in the calcium hydroxide groups were significantly varied during the study period, with pH of the calcium hydroxide group significantly higher than that of CEM in all of the measurements. However, no significant difference was observed between the pH of the calcium hydroxide group and that of the control group at the 7-day and 14-day measurements and between those of the CEM group and the control group at days 7, 21, and 28. ConclusionsIn comparison with calcium hydroxide, CEM hardly maintained alkaline pH during the first month of use, and so CEM may be an inappropriate material in treatment of external root resorption.

Differential Thermal Effects of Pulsed vs. Continuous CO2Laser Radiation on Human Molar Teeth

The risk of thermal injury to pulpal tissue is recognized as a major limitation to the use of lasers for dental hard tissue procedures. This study examined thermal changes at the level of the dental pulp in human molar teeth irradiated in vitro with a CO dental laser using pulsed and continuous modes of operation. The laser parameters were those used clinically for procedures such as laser etching of enamel and treatment of external resorption. For a given energy, pulsed modes with low duty cycles induced markedly less thermal change than continuous wave. With regard to thermal properties of tooth structure, time required to reach the maximum temperature reduced, and time required to cool to baseline increased with increasing laser exposures. These findings suggest the importance of pulsed modes of operation in reduction of risk of injury to the dental pulp.

Clinical evaluation of dental hard tissue applications of carbon dioxide lasers.

This clinical study examined the pulpal safety of selected CO2 laser hard tissue applications. A total of 187 hard tissue procedures were performed on 54 patients. The mean period of follow-up following laser treatment was 13.5 months (range 2-24 months). The procedures included etching (n = 96), desensitizing (n = 56), laser-enhanced fluoride (n = 28), treatment of external resorption (n = 4), and pulp capping or pulpotomy (n = 3). Only the latter two procedure types were performed with anesthesia. The total irradiation received during these procedures ranged from 2 to 12 J. No patients complained of sensation or discomfort during any procedure. Pulp vitality was maintained in all teeth, and no instances of postlasing thermal sensitivity or pulpitis were reported. These results indicate that pulp vitality can be maintained provided that conditions of irradiance are controlled carefully to minimize thermal effects.

Treatment of external resorption by a combined endodontic-periodontic procedure

A case of external resorption of a mandibular first premolar where both endodontic therapy and periodontal surgery were needed is presented. The patient came to the Dental School with a complaint of pain in the mandibular right quadrant. Radiographically, an irregular radiolucency was present at the cemental enamel junction. The essential biological principles for this treatment to be successful are given.