Couple Of Fundamental Info About Lenvatinib Described
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    weeks later, after placement of permanent crown, the upper left central incisor showed stable result [Table/Fig-10]. [Table/Fig-6]: Pre Treatment [Table/Fig-7]: Extrusive Component [Table/Fig-8]: Post Extrusion Intraoral and Radiograph [Table/Fig-9]: Post Extrusion [Table/Fig-10]: Follow Up Discussion Extensive caries or crown fracture may create a situation where placement of the restoration may be difficult. The major problem with subgingival fracture is absence of adequate coronal ferrule and a compromised biological width. Ingber suggested that a Minimum distance of 3 mm is Glafenine required from the restorative margin to the alveolar crest to permit adequate healing and restoration of the tooth [2]. Orthodontic extrusion is also indicated in angular bone defects, isolated periodontal pockets [3] and in patients when surgical extraction is contraindicated (e.g., in patients receiving chemotherapy or radiotherapy) [4]. If the fracture line is positioned below free gingival margin and, if the length of the root is sufficient, then

    the root can be endodontically treated and orthodontically extruded above the gingival margin. This procedure enables more favorable prosthodontic coronal restoration by preserving a good periodontal tissue health [5]. The movement of the teeth in the direction of eruption in the absence of gingival inflammation leads to elongation of periodontal fibres and also deposition of bone at the alveolar crest [6]. Several extrusion techniques are available, depending on the clinical conditions encountered. Fixed and removable orthodontic appliances can be used for extrusion, which include

    conventional fixed appliances, section fixed appliances, and removable plates.A fixed orthodontic appliance require minimal patient co-operation and is well tolerated by the patient. Orthodontic brackets can be directly placed on the buccal aspect of the tooth to be extruded. If the dental tissue is inadequate for bonding bracket, traction can be applied from attachment inserted into the prepared canal of the tooth after endodontic therapy [7]. Authors have recommended that the maximum force for a slow movement should not exceed 30 gm, whereas for rapid extrusions, forces higher than 50 gm are applied [8,9]. After a latency period of a few days to a few weeks, including a period of hyalinization, slow extrusion occurs at a rate of approximately 1 mm or less per week [8]. Brown and Welbury reported that in practice there is always some movement of the surrounding bone and gingival tissue when the tooth is extruded, but these changes were less prominent when the extrusion was carried out with light forces and at a slower rate [10]. Prior to final restoration, it is important to retain the root in its new position to prevent relapse [11].

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