September, 2008, Vol. 10, No. 4

CONTENTS

SCIENTIFIC ARTICLES

Detection of proximal caries in conventional and digital radiographs: an in vitro study
Maria Ivete Rockenbach, Elaine Bauer Veeck, Nilza Pereira da Costa
115-120

Influence of ceramic inlays and composite fillings on fracture resistance of premolars in vitro
Antra Ragauska, Peteris Apse, Vladimirs Kasjanovs, Liga Berzina-Cimdina
121-126

A 2-year follow-up study on standard length implants inserted into alveolar bone sites augmented with homografts
Maurizio Franco, Emanuela Tropina, Bruno De Santis, Alessandro Viscioni, Leone Rigo, Riccardo Guidi, Francesco Carinci
127-132

Veneer fracture in implant-supported metal-ceramic restorations. Part I: Overall success rate and impact of occlusal guidance
Tomas Linkevicius, Eugenijus Vladimirovas, Simonas Grybauskas, Algirdas Puisys, Vygandas Rutkunas
133-139

CLINICAL CASE REPORTS

Anterior crossbite correction in primary and mixed dentition with removable inclined plane (Bruckl appliance)
Irena Jirgensone, Andra Liepa, Andris Abeltins
140-144

© 2008 Stomatologija

Stomatologija 2008; 10 (4): 133-139 132 KB

Veneer fracture in implant-supported metal-ceramic restorations. Part I: Overall success rate and impact of occlusal guidance

Tomas Linkevicius, Eugenijus Vladimirovas, Simonas Grybauskas, Algirdas Puisys, Vygandas Rutkunas

Summary

Purpose. The aims of the presented study were to define the fracture rate of implant-supported metal-ceramic restorations delivered in private practice, and to identify if a restoration's contact during eccentric mandible movements has any influence on ceramic fracture rates.

Material and Methods. Within the period from 2005 to 2008, 251 patients, namely 105 men (42%) and 146 women (58%), received 775 dental implants which later were restored with metal-ceramic restorations. Data was gathered and analyzed in the form of a specially-designed electronic questionnaire. In total, 251 patients were rehabilitated with 350 prostheses consisting of 151 single crowns, 208 fixed partial dentures of various extents and 21 full-arch restorations. The method for retention of prostheses included cement-, screw-, or hybrid cement-screw retained prosthetic devices. The patients were recalled and examined for the presence of mechanical complications, namely ceramic fractures. Fractures were distinguished as adhesive or co-adhesive. The follow-up time was registered.

Results. The mean ceramic fracture rate was 6.7%, as fracture occurred in 24 restorations. In the single crown group, the fracture rate was 1.3%, in the fixed partial denture division it was 6.7%, and the full-arch metal-ceramic restorations experienced 38.1% chipping. The mean follow-up period of prostheses was 9.5 months, ranging from 1 to 42 months. The analysis revealed that 66 prostheses had contact in protrusive and/or lateral mandibular movements, constituting 17.4% of all restorations; while 13 restorations had ceramic fractures, composing 19.7% of all guiding prostheses.

Conclusions. Within the limitations of this trial, it can be noted that ceramic veneer fracture rate was 6.7% in 380 restorations, and a conclusion that a restoration's contact during eccentric excursions may significantly enlarge fracture rates can be made.

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¹Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania

²Vilnius Implantology Center, Vilnius, Lithunaia

Tomas Linkevicius¹ – D.D.S., Dip Pros, assist. prof.

Eugenijus Vladimirovas² – D.D.S.

Simonas Grybauskas¹ – D.D.S., MD, MOS RCSEd

Algirdas Puisys² – D.D.S.

Vygandas Rutkunas¹ – D.D.S., PhD, lecturer

Address correspondence to Dr. Tomas Linkevicius, Institute of Odontology, Faculty of Medicine, Vilnius University, Zalgirio str. 115, LT- 08217, Vilnius, Lithuania.

E-mail address: linktomo@gmail.com