Abstract
Introduction For maxillary sinus membrane elevation (MSME), the lateral window approach and crestal approach are available, and high success rates have been achieved with low residual bone height as a development of technology. Objective To evaluate MSME using the crestal approach with a rotary-grind bur (RGB (including reamer or sinus bur)) in patients with residual bone height of <4 mm. Materials and Methods Ten implants were placed in 10 patients with residual bone height of <4 mm, by sinus elevation using an RGB. The implant stability quotient (ISQ) was measured immediately after implant placement (ISQ 1) and before taking impression for the final prosthesis (ISQ 2). The extent of marginal bone loss was measured on periapical radiographs. Results The mean residual bone height before implant placement was 3.41 ± 0.53 mm; no complications, including membrane perforation, severe postoperative pain, or discomfort, occurred either during or after surgery. The mean ISQ 1 was 63.4 ± 12.1, whereas the mean ISQ 2 was 77.6 ± 5.8. The mean marginal bone resorption was 0.23 ± 0.18 mm on periapical radiographs. Conclusions MSME using the crestal approach with an RGB is a reliable technique for implant placement in sites where available bone is insufficient.
Highlights
For maxillary sinus membrane elevation (MSME), the lateral window approach and crestal approach are available, and high success rates have been achieved with low residual bone height as a development of technology
The lateral window approach has been reported to elevate the maxillary sinus by up to 10−12 mm, which is greater elevation than that provided by the alveolar crestal approach (2.5–5.7 mm); notably, the lateral window approach is generally used in cases with low residual bone height (≤45 mm) [3,4,5,6]
Patients with anatomical structures that would interfere with the use of alveolar crestal approach, such as sinus septum, were excluded from this study. e study was approved by the Institutional Review Board (IRB) of Wonkwang University Dental Hospital (WKDIRB 201702-01)
Summary
For maxillary sinus membrane elevation (MSME), the lateral window approach and crestal approach are available, and high success rates have been achieved with low residual bone height as a development of technology. E mean residual bone height before implant placement was 3.41 ± 0.53 mm; no complications, including membrane perforation, severe postoperative pain, or discomfort, occurred either during or after surgery. The lateral window approach is technically more difficult than the alveolar crestal approach and is more likely to cause postoperative complications, including pain and swelling [7] It has a sinus membrane perforation rate of 12–40%, which is higher than that of the alveolar crestal approach (2.2–6.7%) [4,5,6, 8,9,10,11,12]
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