Journal of Japanese Society of Oral Implantology
Online ISSN : 2187-9117
Print ISSN : 0914-6695
ISSN-L : 0914-6695
Considerations in an Insertion Technique of Apatite 2-piece Implant
Part 4. Effects of Pilot Hole Preparation on Bone Tissue
Yasuo OkamotoMasashi MiyamotoTetsuo IchikawaMasanobu HoriuchiYasuyuki HorisakaWigianto RudiHideo KanitaniNaoyuki MatsumotoHideo Yoshida
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JOURNAL FREE ACCESS

1993 Volume 6 Issue 2 Pages 358-362

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Abstract

Proper positioning of the implant is one of the most important steps in the successful apatite 2-piece implant therapy;therefore, the following method using the pilot hole (PH), as a guide for placement, has been used in our clinic for the past four years. First, the direction and position of the implant are determined by using a diagnostic denture and the PH is made in the center of implant site. After several weeks, the implant is positioned according to the determined direction and position.
The validity of this procedure has been already demonstrated. The effects of the PH preparation on the bone tissue, however, is not well-known. The purpose of this investigation is to examine the effects of the PH preparation on the bone tissue by a histological technique.
Seven patients were used as subjects. The PH was prepared at various durations of time, such as 2, 4, or 8 weeks, beforehand. Some of them were prepared at the implant placement. Fifteen pieces of bone column with PH in its center were obtained therefrom. These were fixed in 10% neutral buffered formalin, dehydrated, and embedded in paraffin. Partial serial sections were observed under a light microscope.
In the specimen with the PH prepared several weeks beforehand, numerous newly-formed bone tissues surrounding the old bone trabeculae in the spongy bone area around the PH were observed. On the other hand, in the specimen with the PH prepared at the placement, only slight and thin trabecular bone was observed.
These findings indicate that the surrounding bone tissue was increased by the PH preparation. It is suggested that this expansive bone formation may be advantageous for obtaining higher probability of good ankylosis between the implant surface and bone.

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© 1993 Japanese Society of Oral Implantology
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