Fogorvosi szemle, 2006 (99. évfolyam, 1-6. szám)
2006-04-01 / 2. szám
FOGORVOSI SZEMLE ■ 99. évf. 2. sz. 2006. 69 According to the long-term results the best results are obtained when implant placement is combined with bone augmentation. Z. HAJDÚ,1 L. RÓTH,1 2 DR. P. HERMANN,3 DR. J. GERLE4 1 Central Laboratory of Dental Technics;2 Interdental Studio Dental Laboratory;3 Semmelweis University, Faculty of Dentistry, Department of Prosthodontics; 4 Semmelweis University, Faculty of Dentistry, Training Unit PROSTHETIC IMPORTANCE OF WAX-ADDED TECHNIQUE One of the main requirements of fixed partial denture prosthetic treatment is to restore functionality. Carving the wax pattern of crowns and fixed partial dentures allows only to create schematic simulations instead of an occlusal surface consistent with optimal occlusion and proper anatomic size and shape. Carving techniques do not give opportunity to reproduce patients individual occlusal pattern. After casts has been accurately orientated and mounted on an articulator by using a facebow transfer and intercuspal position records, occlusal surface built up with a wax-added technique achieve occlusal harmony between the restoration and the other teeth in the mouth. Restorations of this technique offer advantages with regard to quality and cost-effectiveness: better fit in the patient’s mouth and less time-consuming occlusal corrections. Functionally generated occlusal scheme for the restoration can be established in the wax pattern - in case of metal occlusal surfaces - or by appropriate buildup of porcelain veneer for optimal function. Basic fundamentals for optimal occlusion is to determine the location of occlusal contact on opposing teeth, and to allow unrestricted movements during all excursive pathways. The first step in making a wax pattern is establishing optimal axial contours of retainers and pontic taking the gnathologic viewpoint. Open space need to be provided to build up the occlusal surface. Making the wax pattern of cusps starts with placing cones of appropriate length, followed by adding wax to form the triangular ridges. These should be convex to allow for occlusal contact points. Next step of procedure is to form mesial and distal cusp ridges and marginal ridges ensuring the free mandibular movements through all excursions. Accuracy of restauration depends on checking procedures performed precisely on the articulator. Preliminary adjustment of metal casts - on the occlusal surface - should be completed by using marking ribbons. The more accurate fabrication has the advantage of requiring less alteration in the oral cavity, prevents errors in occlusion because of interference with the natural bite of the patient. This technique enables the dentist and technician to capture the pathways traveled by the opposing cusps in the mandibular function, and fabricate restorations that will be into harmony with the rest of the dentition. Z. HAJDÚ,1 L. RÓTH,2 DR. P. HERMANN,3 DR. J. GERLE4 Dentistry, Department of Prosthodontics;4 Semmelweis University, Faculty of Dentistry,Training Unit PERIODONTAL ASPECTS OF MAKING A WORKING CAST The fabrication of a sectional cast with removable dies play an important role in dental techniques as the vast majority of fixed restorations are constructed on some sort of accurate model of the patients oral anatomy. The removal and trimming of working model dies destroy important soft tissue information. Features such as the gingival sulcus, interdental papilla, and ridge form are often destroyed. The dental technician must have an accurate impression of gingival contour, in order to design a prosthetic restoration assuring long-term periodontal health. There are two basic methods of gingival mask fabrication. The injection technique applies highly elastic, addition-curing silicone materials, similar to light-bodied “syringe” impression elastomers. After isolated segment of impression being replaced and seated on prepared cast, injected gingival mask material restores reference gingival architecture. Removable gingival replacement unit can be fabricated by pouring it directly into the impression. This type of flexible gingival mask is usually fabricated for implant supported/retained dentures and combined fixed-removable prosthetics. It is essential to apply a separator before pouring the laboratory duplicating silicone of gingival mask. Lab pins should be checked to ensure that they are seated properly. After the gingival material has set, the impression is poured in stone and master cast is made. The location of the gingival margin, features of interdental papilla and the emergence profile are critical variables in the design and aesthetics. Gingival mask ensures optimal contouring of the crown. Prosthetic restorations of chamfer or shoulder preparation can be perfectly adapted due to the detailed reproduction of the natural gingival situation, especially concerning the functional design of interdental areas. Location and emergence of the prosthetic margin are crucial to the gingival health and maintenance of oral hygiene. DR. A. HORVÁTH, DR. I. GERA Semmelweis University, Department of Periodontology, Budapest COMBINED TREATMENT WITH GUIDED TISSUE REGENERATION AND CONNECTIVE TISSUE GRAFT OF A PERIODONTAL NECROSIS AFTER RCT WITH “RADIOSURGERY” - A CASE REPORT Background: The surgical technique utilizing radiofrequency has had a wide publicity in the recent years. It doesn’t seem to be free of side effects at all. Overheating due to inadequate 1 Central Laboratory of Dental Technics;2 Interdental Studio Dental Laboratory;3 Semmelweis University, Faculty of
