function of altered cast impression dental

#Function of altered cast impression dental full

The patient decided to pursue the treatment plan which included the fabrication of a lower CPD.A step by step procedure is outlined with reference to various clinical and laboratory stages during the treatment: Stage 1: Option of implant retained fixed partial dentures was given to the patient but the patient could not afford the expense of the treatment. No further signs of abnormalities were detected during intra-oral and extra-oral examination and it was decided that a new cast partial denture (CPD) is provided to the patient using the alteredcast technique once tissue healing is adequate. The denture had inadequate base extensions and poor tissue adaptation due to which there were signs of minor trauma to the soft tissue covering the crest of the alveolar ridge.

The patient was wearing an acrylic partial denture which was loose and ill fitting. Case ReportĪ 53 year old medically stable female patient attended the outpatient department of ZiauddinCollege of dentistry complaining of missing posterior teeth in the lower arch.

The following paper outlines a quick and easy technique for constructing an altered cast for an RPD. Other benefits include reduction of the number of post operative visits, preservation of the residual ridges and decreasing the food impaction. It offers several advantages which include maximum stability, minimal stress on abutment teeth, and more predictable occlusion (3). Also known as the corrected-cast technique (3) the technique requires an additional step for both the dentist and the dental technician. Support from the residual alveolar ridge as described by Carr and Brown (1) will depend on several factors which include the quality of the residual alveolar ridge and its contour, extent of the ridge covered by the RPD, the accuracy of the impression, fitting accuracy of the denture, RPD design and the total occlusal load applied during function.Īn altered cast impression procedure to improve the support of distal extension removable partial dentures is widely taught, but not often used in dental practice (2).

The tooth supported RPDs have an advantage of presence of a direct retainer whereas this is lacking in the prosthesis fabricated over distal extension bases. These dentures only have partial support from teeth as their bases may be the extensions covering the ridge distal to the last abutment tooth.

#Function of altered cast impression dental full

Users should refer to the original published version of the material for the full abstract.Distal extension removable partial denture (RPD) depends largely on the residual alveolar ridge for support, stability and retention. No warranty is given about the accuracy of the copy. However, users may print, download, or email articles for individual use. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. Copyright of Quintessence International is the property of Quintessence Publishing Company Inc.Not only is it easy and less technique-sensitive for the operator, but it also results in increased comfort and reduced need for multiple adjustment visits for the patient. This enables the partial denture to be constructed from a cast made from a single impression and results in a prosthesis that is stable and has well-extended borders. The functional reline is performed after the removable partial denture is processed to perfect the fit of the denture base to the residual ridge. A modified approach of fabricating a distal-extension partial denture is presented using a laboratory-processed functional reline method. However, there is some controversy among clinicians as to the technique and requirements of both tooth and tissue management of the distal-extension partial denture. The advantages of an altered cast impression technique are that it evenly distributes stresses between hard and soft tissues and reduces stresses to the abutment teeth. Abstract: An altered cast impression technique is routinely used for fabricating distal-extension partial dentures.