Evrem Gülnahar1, Koray Soygun2* and Giray Bolayır2
1Department of Prosthodontics, Faculty of Dentistry, Erzincan University, Erzincan, Turkey
2Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
Received: 04 February, 2016; Accepted: 12 July, 2016; Published: 13 July, 2016
Koray Soygun, Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey; Tel: +90-505-644-3928; E-mail:
Gülnahar E, Soygun K, Bolayır G (2016) The Customized Forming of the Applied Post-Core System: Case Reports. J Dent Probl Solut 3(1): 031-034. 10.17352/2394-8418.000031
© 2016 Gülnahar E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Zirconia; Post-core; CAD/CAM
The high success rate of endodontic treatments caused an increase in demand for the post-core systems in restoration of severely damaged teeth. Although metal posts are the most commonly used alternatives, the metallic color and the opaque appearance of these materials lead to discoloration of the gums and the roots. Thus, non-metal posts systems could be preferred over metal posts to be used with all-ceramic crowns. Due to their superior mechanical and biological properties, CAM/CAD fabricated zirconia post and cores can be applied inside the root canal and can be supported with ceramic crowns. Hence, the aesthetic concerns could be attended quickly and with ease. This article presents the prosthetic rehabilitation treatment of two patients with severe dentin loss, using CAD/CAM fabricated post-core and zirconia base crowns.
In the restoration of endodontically treated teeth with extensive coronal damage, a post-core is recommended to enhance support and retention of the crown [1-3]. These post core models are produced using various materials such as titanium, carbon, polyethylene fiber and stainless steel. However, corrosion reaction of metal posts cause metallic taste, oral burning, oral pain, sensitization and other allergic reactions. Metal posts also have negative effects on the aesthetic results, which lead to the increased preference of all-ceramic restorations . Non-metal posts are superior to metal posts, both due to health and esthetic concerns. With non-metal posts corrosion reaction doesn’t occur and chance of toxicity is very low. The available color options are also closer to the tooth color. As a result of these advantages, a number of different all-ceramic posts, such as fiber reinforced composite resin posts (FRC) and yttrium-stabilized zirconia-based ceramic posts has been widely available for the restoration of teeth [4-7]. The use of zirconia as a post and core was introduced by Meyenberg et al. in 1993 .
The CAD/CAM technique provides high precision and quality in a shorter period of time. Especially in the restoration of teeth with all ceramic crowns, the CAD/CAM system produces superior results in satisfying the aesthetic demands of the patient. This technique is particularly advantageous with cases that require building custom posts. Custom made posts enhance adaptation to prepared canal wall. The current CAD/CAM system use alumina or partially sintered zirconia blocks to mil a post and core. It achieves notable precision in building posts. It is also relatively quicker, since a post and core can be completed in the same appointment, when using this technique [8-10].
This paper reports two cases of yttrium-stabilized zirconia-based ceramic post restorations, which are manufactured using the CAD/CAM (Dental Wings, Montreal, Kanada) technique, for two patients with severe coronal loss.
A 22 year-old female patient came to our hospital with a severe sensitivity complaint in the first right and left maxillar molar teeth. The radiographic and intraoral examination of the teeth 16 and 26 displayed the previous restoration of the caries in these teeth. However, the composite filling treatment seemed to have failed due to the passive eruption of mandibular teeth, which caused a decline in the occlusal distance (Figure 1). As a result of the increasing complaints of the patient, a conventional endodontic treatment was approved. After considering the aesthetic concerns of the patient, and the short supragingival crown height, CAD/CAM (Dental Wings, Montreal, Kanada) fabricated zirconia post and cores, and ceramic crowns were planned as the restoration treatment to enhance the retention of the crown.