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Abstrak :
ABSTRAK Latar belakang : Keberhasilan gigi tiruan dukungan implan sangat ditentukan oleh stabilitas awal (primary stability) pada saat pemasangan, sehingga terjadi osseointegrasi. Stabilitas tersebut dipengaruhi oleh beban oklusal yang diterima melalui restorasi sementara. Beban oklusal yang diterima implant pada , dapat secara langsung pada saat implantasi (immediateloading) atau setelah terjadi osseointegrasi (delayed loading). Masih banyak kontroversi mengenai pengaruh besar beban pada stabilitas implan. Oleh karena itu, perlu dilakukan penelitian seberapa besar pengaruh kontak oklusal pada restorasi terhadap stabilitas implan yang dipasang secara immediate loading. Metode : Pada tiga ekor Macacafascicularis, dilakukan pemasangan Sembilan implant gigi. Segera setelah implant ditanam pada tulang, restorasi sementara dipasang pada implant dengan kontak ingan, normal dan tanpa kontak. Nilai stabilitas implant diukur menggunakan Ostell ISQ segera setelah pemasangan implan, bulan pertama dan kedua setelah pemasangan implan. Hasil : Terdapat perbedaan bermakna dari nilai stabilitas implan (p<0,05) antara kelompok kontak oklusal normal dengan tanpa kontak; dan kontak oklusal normal dengan kontak ringan. Namun tidak ditemukan perbedaan bermakna (p>0,05)pada kenaikan nilai stabilitas implan yang terjadi antara periode baseline, bulan pertama dan bulan kedua pada seluruh kelompok kontak oklusal. Simpulan: Terdapat pengaruh kontak oklusal restorasi sementara pada implan yang dipasang secara immediateloading terhadap stabilitas implan dan kontak oklusal yang menghasilkan nilai stabilitas paling besar setelah pemasangan implan adalah restorasi tanpa kontak.

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ABSTRACT Introduction: successful of dental implant were determined by primary stability when placement. The stability were influnced by occlusal loading thriugh provisional restoration. There are two types of loading protocol that usually used, immediate and delayed loading. But there are still controversies about the influence of occlusal loading on implant's stability. Therefore, it was necessary to study the influence of immediate loading to implant's stability. Method: Nine dental implants were placed on the mandibular of three Macacafascicularis. Provisional restorations with various occlusal contacts (no contact, light, and normal contact) were placed to the implant. Implant stability was measured using the Ostell ISQ three times, immediately (baseline), first month and second month after implant placement. Result: Implant stability between implant with no occlusal contact and normal contact and also light occlusal and normal occlusal contact were found significantly different (p<0,05). However, there was no significant increased (p>0,05) found on implant stability measured at baseline, first and second month after implant placement for all occlusal contact groups. Conclusion: There were influence of immediate loading to implant's stability and provisional restoration of implant without occlusal contact showed highest implant good stability result.

Abstrak :
ABSTRACT
This study aimed to examine the dynamic change in bone metabolism by immediate loading in several sites around implants using high-resolution Na18F-PET scan. Two titanium implants ( 1.2 mm) were inserted parallel to each other in the right tibiae of Wistar rats (n = 4). The left tibia was set as control side. One day after insertion, closed coil springs of 4.0 N were attached to the expose superior portions of the implants to apply a continuous mechanical stress. The rats with fluorine-18 (18F) ion (5 mCi/rat) intravenously injected were scanned by PET scanner at 4, 7, 14, 28 days after load application. Round region of interests (ROIs) were set around the distal implant of the right tibia (loaded side) and same site (control) of the left tibia. Furthermore, four rectangular ROIs were set at the superior and inferior parts of traction side (mesial) and opposite side (distal) of the distal implant. Longitudinal dynamic changes in bone metabolism were evaluated by examination of the accumulation count of 18F ion at each ROI. The uptake values of ROIs (loaded side) initially increased until 7 days, and they gradually decreased from the peak level to the pre-loading level despite a static force being applied to the implants. In cancellous bone, the uptake values at the superior part of traction side and inferior part of opposite side showed significantly high value compared with those at other parts. In conclusion, immediate loading to the implant initially enhanced bone metabolism around it, especially at the part with compressive stress. Peri-implant bone metabolism varies according to different loading conditions.