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Bone morphology changes around two types of bone‐level implants installed in fresh extraction sockets – a histomorphometric study in B eagle dogs

2014; Wiley; Volume: 26; Issue: 9 Linguagem: Inglês

10.1111/clr.12388

1600-0501

Hend M. Alharbi, Nadir Babay, Hamad Alzoman, Sumaya Basudan, Sukumaran Anil, John A. Jansen,

Dental Radiography and Imaging

Abstract Background Minimizing crestal bone loss following immediate implant placement is considered the most challenging aspect in implant therapy. Implant surface topography and chemical modifications have been shown to influence the success of O sseointegration. The S traumann ® B one L evel implant, featuring SLA ctive surface, has been introduced with the aim of enhancing bone apposition. Similarly, the O sseo S peed™ implants from A stra T ech claim to have an enhanced osseointegration. Because of the specific features in the implant design, both companies claim that crestal resorption is minimal with these implants. Objective To evaluate the osseointegration and crestal bone level following immediate placement of S traumann ® B one L evel implant and O sseo S peed™ implants in fresh extraction sockets in B eagle dogs. Method The distal roots of the second, third and fourth premolars were extracted in both sides of the mandible. The distal roots were removed using a dental elevator. A total of 60 fixtures were installed in 10 B eagle dogs. Two types of implants were used: S traumann ® Bone‐Level implants, which were 8 × 3.3 mm in size, and A stra T ech O sseo S peed™ 3.5 S M icro T hread™ implants, which were 8 × 3.5 mm in size. The histomorphometrical evaluation was performed at the end of 4‐ and 12‐week healing. The implant–bone contact and bone volume percentage were assessed. Results The bone‐to‐implant contact ( BIC ) and the bone volume did not show any significant changes for both types of implants. The O sseo S peed™ implants showed 67.4% and 65.3% BIC , respectively, at 4 and 12 weeks compared with 71.7 and 73.1 for the S traumann ® Bone‐Level implants. The bone volume around both types of implants did not differ significantly at both time periods. The crestal bone resorption was observed for both types of implants. The first BIC at buccal side and lingual side of the implants also did not differ significantly for both implant systems. Conclusions This study showed that S traumann ® B one L evel and O sseo S peed™ implants induced similar bone response after immediate implantation at 4 and 12 weeks. The immediate implant placement resulted in peri‐implant crestal bone‐level changes for both types of implants.