A comparative study of the differences of bone interface between two-stage implant and one-stage implant
| Project/Area Number |
04454485
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
補綴理工系歯学
|
|---|
| Research Institution | HIROSHIMA UNIVERSITY |
|---|
Principal Investigator |
HASIHIMOTO Masaki Hiroshima Univ.Sch.of Dentistry Assistant Professor, 歯学部・附属病院, 講師 (80189505)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
WADAMOTO Masayoshi Hiroshima Univ.Sch.of Dentistry Research assistant, 歯学部, 助手 (70231040)
MORIYA Naofumi Hiroshima Univ.Sch.of Dentistry Research assistant, 歯学部, 助手 (50220091)
赤川 安正 広島大学, 歯学部, 助教授 (00127599)
津留 宏道 広島大学, 歯学部, 教授 (90034157)
|
|---|
| Project Period (FY) |
1992 – 1993
|
| Project Status |
Completed (Fiscal Year 1993)
|
| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1992: ¥5,600,000 (Direct Cost: ¥5,600,000)
|
|---|
| Keywords | Two-stage / One-stage / Dental Implant / Titanium alloy / Zirconin |
|---|
| Research Abstract |
The purpose of this study was to compare two-stage implant-bone interface with that in one-stage implant. In experiment 1, twelve beagle dogs were divided into 3 groups and 24one-stage implants(12Ti6A14V(Ti), 12zirconium(Zr)) and 12 two-stage implants(6Ti, 6Zr)were inserted into the edentulous areas of each mandible. In group 1(G1), Metal superstructures were cemented on one-stage implants 1 week after insertion and implants were loaded for 3 months. In group 2(G2), no metal superstructure was cemented one-stage implants for 3 months. In group 3(G3), tow-stage implants were left for 3 months. After 3 months animals were sacrificed and undecalcified sections were prepared and examined by light microscopy. Histomorphometric analyzes were also performed. Osseointegration was generally achieved in these 3 groups of each implant. But remarkable crestal bone loss was evident in G1. Bone contact ratio(BCR)of the Ti implant in G3 was significantly higher than others. The value of BCR of the Zr in G3 was lower than others. These suggest that Zr is not suitable for two-stage implant. In experiment 2, only Ti implant used, 6 beagle dogs were divided into 3 groups that were the same as experiment 1. In G2 and G3 metal superstructure were cemented on these implants after 3 months of insertion. In each group, implants were loaded for 12 months afterwards similar procedures were done. Osseointegration was generally achieved in these 3 groups. However, bone apposition to the bottom of the threads was predominantly seen in G2 and G3. Remarkable crestal bone loss was evident in G1. Bone contact ratio of the implant in G3 was significantly higher than others. These results suggest that the difference of implant surgical procedure, two-stage and one-stage, effect osseointegration and two-stage implant may be preferable to one-stage unloaded implants regarding more bone apposition.
|
Report
(3 results)
Research Products
(3 results)
