March, 2004, Vol. 6, No. 1
CONTENTS
SCIENTIFIC ARTICLES
Dentofacial Morphology of Class II Division 1
3 - 6
Accuracy of Computerized Axiography Controlled by MRI in Detecting Internal Derangements of the TMJ
7 - 10
Clinic, Diagnostics and Treatment Pecularities of Eagle’s Syndrome
11 - 13
CLINICAL ARTICLES
SCIENTIFIC ARTICLES
Panoramic Radiographs in Assessment the Bone Mineral Density
17 - 19
Oral Health Status in the Participants of the “Juvenile Hypertension Program 2002”
24 - 27
Dental Status Among 2-6 Year Old Children in Riga City, Latvia
28 - 30
ERRATUM
27
© 2004 Stomatologija
Stomatologija 2004; 6 (1): 14-16 
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The Influence of Site Preparation (Countersinking) on Initial Dental Implant Stability. An in vitro Study Using Resonance Frequency Analysis
Linish Vidyasagar, Girts Salms, Peteris Apse, Uldis Teibe
Summary
Primary implant stability is now generally accepted as an essential criterion for obtaining osseointegration. It is generally accepted that it is necessary to achieve good stability at the time of implant placement to achieve consistent osseointegration. However, this can be difficult in bone of low density. Consequently the question is how to improve implant stability in softer bone qualities. The present study is designed to test implant stability, using Resonance Frequency Analysis (RFA), in relation to surgical technique (countersinking of the implant site). The implant stabilities of 2 implants types (Biohorizon, D2 and D3) were studied after insertion into pig ribs. In all, the implants were divided into 4 groups. Group A: D2 implants placed with countersinking of the implant site, Group B: D3 implants placed with countersinking of the implant site, Group C: D2 implants placed without countersinking of the implant site, Group D: D3 implants placed without countersinking of the implant site. Higher primary stabilities were observed for the groups placed without countersinking of the implant site. Elimination of countersinking in low density bone should be considered to increase initial implant stability.
Key words: dental implant, stability, resonance frequency, surgical technique
Received: 02 03 2004
Accepted for publishing: 27 03 2004
Linish Vidyasagar - B.D.S., MSc (Helsinki), Dip. Prosth., Department of Prosthodontics, Faculty of Dentistry, Riga Stradina University, Riga, Latvia.
Girts Salms - M.D., D.D.S., Lecturer at Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Riga Stradina University, Riga, Latvia.
Peteris Apse - D.D.S., MSc (Toronto), Dr. habil med. (Latvia), professor, Department of Prosthodontics, Faculty of Dentistry, Riga Stradina University,Riga, Latvia.
Uldis Teibe - Dr.Biol., Assoc.Prof. at Department of Prosthodontics, Faculty of Dentistry, Riga Stradina University, Riga, Latvia.
Address correspondence to Prof. Peteris Apse, Dzirciema 20, Riga, Latvia, LV 1007. E-mail: apse@ark.lv