Abstract:

BACKGROUND: The new type implant designed by Professor Liu integrates the character of cylinder implant and blade implant. It is shorter but bigger in contact area. The design of new type implant is considered the torsional capacity, lateral force resisting ability, the match of implant and bone elastic modulus, as well as processing and implantation and repair convenience.
OBJECTIVE: To investigate the changes of type Ⅰ collagen expression in the implant-bone interfaces after implanted to the jawbone, and to explore the combining capacity of the new type implant and alveolar bone.
METHODS: All the premolars in the bilateral jaw of six adult dogs were extracted. Three months later,two new type implants and two cylinder implants were implanted to the sockets and divided to the new type implants group and cylinder implants group.
RESULTS AND CONCLUSION: The density of the guided bone tissue in the two groups was increased with time. The tissues with gradually increased density in the disk structure of the new type implant group were found. The expression of type Ⅰ collagen was found in the implant-bone interfaces of the two groups, and both reached the peak at week 4 after surgery. The mean gray value of the new type implant group at weeks 2 and 4 after surgery was higher than that of the cylinder implants group (P < 0.05). These findings suggest that new type implant can achieve success after implanted into the jaw bone due to its special design. The osseointegration of the new type implant is earlier, more active and stronger combining capacity than that of the cylinder implant.