J Korean Assoc Maxillofac Plast Reconstr Surg.  2008 Nov;30(6):554-560.

Resonance Frequency Analysis in Non-Submerged, Internal Type Implant with Sinus Augmentation Using Deproteinized Bovine Bone Mineral

• Lee JH
• Min HG
• Lee JS
• Kim MR
• Kang NR

Abstract

In posterior maxilla, it is difficult to achieve primary stability of implants due to sinus pneumatization, alveolar bone loss, and low bone quality. The accurate and objective primary stability assessment is important for good prognosis of implants. PURPOSE: The aim of this study was to assess the primary stability of the non- submerged, internal type implants with maxillary sinus augmentation using deproteinized bovine bone mineral by a resonance frequency analyzer, when residual alveolar bone height is under 8mm
MATERIALS AND METHODS
A total of 20 implants was placed into 5 grafted maxillary sinuses in 5 patients. Deproteinized bovine bone mineral (Bio-Oss(R)) was used as graft material. SSII implants (diameter 4.1mm, and length 11.5mm, SLA suface)) were placed. All of the patients received maxillary sinus graft procedure by 1-step technique. Residual bone height was 1.3~7.8mm (mean 4.4mm) measured by panorama radiography. After implant placement, RFA was measured at 4,8,12,20 weeks. The results were divided into 2 groups; RFA value under 4mm and over 5mm of bone height. It was statistically analyzed.
RESULTS
1. The primary stability of implants was increased with time 2. The RFA value was above 65 ISQ at 12 weeks 3. There was no correlation between RFA and residual alveolar bone height in maxillary sinus augmentation by 1-step technique
CONCLUSION
1-step surgical procedure is a feasible option for patients with as little as 4mm residual alveolar bone height , when utilizing non-submerged, internal type implants with xenografts

Keyword

Sinus graft; Implant; RFA

MeSH Terms

Alveolar Bone Loss
Humans
Maxilla
Maxillary Sinus
Prognosis
Transplantation, Heterologous
Transplants