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Baltic Dental and Maxillofacial Journal

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

Stomatologija 2008; 10 (4): 121-126 458 KB

Influence of ceramic inlays and composite fillings on fracture resistance of premolars in vitro

Antra Ragauska, Peteris Apse, Vladimirs Kasjanovs, Liga Berzina-Cimdina

Summary

Objective. The aim of this study was to assess the resistance of fracture of mesio-occlusal-distal (MOD) ceramic inlays and composite fillings in premolars and to compare fracture modes between the groups.

Material and methods. Twenty seven extracted intact human premolars were selected and divided into three groups: I – intact teeth (control group), II – MOD cavities restored with indirect ceramic inlays (Finesse, Dentsply Ceramco, USA), III – MOD cavities restored with direct composite fillings (Filtek P60, 3M ESPE, USA). The fracture resistance (N) was assessed under axial compressive loading with a metal cylinder 3.2 mm in diameter at a cross-head speed of 0.5 mm/min in a universal testing machine. The data were analyzed with ANOVA and t-test (pd£0.05). Fracture modes were recorded based on the degree of tooth structure and restoration damage.

Results. The mean force applied to cause failure for group I was 1.218 kN ±0.223, for group II – 1.407 kN ±0.374 and for group III – 0.941 kN ±0.258. T-test showed significant difference between groups I and III (p=0.027), and groups II and III (p=0.008). The fracture modes observed in all groups tended to involve restoration’s and cusp’s fracture.

Conclusion. It was observed that ceramic inlays in premolars have higher load to fracture value than composite fillings and similar to intact teeth. Both restorations, ceramic and composite in the premolars, tended to fracture together with palatal cusp of tooth.

Key words: ceramic inlays, direct composite, fracture resistance.

Received: 25 07 2008

Accepted for publishing: 22 12 2008

Antra Ragauska – DDS, assistant, Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, Latvia

Peteris Apse – DDS, MSc (Toronto), Dr. Habil. Med., professor and acting head at Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, Latvia

Vladimirs Kasjanovs – Dr. Habil. Sc. Ing., professor, Riga Stradins University, Latvia

Liga Berzina-Cimdina – Dr.Sc.Ing., asoc. professor, Riga Technical University, Latvia

Address correspondence to Dr. Antra Ragauska: Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, 20 Dzirciema Street, Riga, LV-1007, Latvia.

E-mail: antraragauska@inbox.lv



	Baltic Dental and Maxillofacial Journal

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): 121-126 458 KB Influence of ceramic inlays and composite fillings on fracture resistance of premolars in vitro Antra Ragauska, Peteris Apse, Vladimirs Kasjanovs, Liga Berzina-Cimdina Summary Objective. The aim of this study was to assess the resistance of fracture of mesio-occlusal-distal (MOD) ceramic inlays and composite fillings in premolars and to compare fracture modes between the groups. Material and methods. Twenty seven extracted intact human premolars were selected and divided into three groups: I – intact teeth (control group), II – MOD cavities restored with indirect ceramic inlays (Finesse, Dentsply Ceramco, USA), III – MOD cavities restored with direct composite fillings (Filtek P60, 3M ESPE, USA). The fracture resistance (N) was assessed under axial compressive loading with a metal cylinder 3.2 mm in diameter at a cross-head speed of 0.5 mm/min in a universal testing machine. The data were analyzed with ANOVA and t-test (pd£0.05). Fracture modes were recorded based on the degree of tooth structure and restoration damage. Results. The mean force applied to cause failure for group I was 1.218 kN ±0.223, for group II – 1.407 kN ±0.374 and for group III – 0.941 kN ±0.258. T-test showed significant difference between groups I and III (p=0.027), and groups II and III (p=0.008). The fracture modes observed in all groups tended to involve restoration’s and cusp’s fracture. Conclusion. It was observed that ceramic inlays in premolars have higher load to fracture value than composite fillings and similar to intact teeth. Both restorations, ceramic and composite in the premolars, tended to fracture together with palatal cusp of tooth. Key words: ceramic inlays, direct composite, fracture resistance. Received: 25 07 2008 Accepted for publishing: 22 12 2008 Antra Ragauska – DDS, assistant, Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, Latvia Peteris Apse – DDS, MSc (Toronto), Dr. Habil. Med., professor and acting head at Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, Latvia Vladimirs Kasjanovs – Dr. Habil. Sc. Ing., professor, Riga Stradins University, Latvia Liga Berzina-Cimdina – Dr.Sc.Ing., asoc. professor, Riga Technical University, Latvia Address correspondence to Dr. Antra Ragauska: Department of Prosthodontics, Faculty of Stomatology, Riga Stradins University, 20 Dzirciema Street, Riga, LV-1007, Latvia. E-mail: antraragauska@inbox.lv