Clinical and Radiographic Outcomes of a Novel Transalveolar Sinus Floor Elevation Technique
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ORIGINAL ARTICLE
Clinical and Radiographic Outcomes of a Novel Transalveolar Sinus Floor Elevation Technique Mahdi Kadkhodazadeh1 Reza Amid2
•
Anahita Moscowchi2 • Zeinab Zamani2
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Received: 17 April 2020 / Accepted: 18 August 2020 Ó The Association of Oral and Maxillofacial Surgeons of India 2020
Abstract Objective The aim of this study was to evaluate the clinical and radiographic outcomes of the ‘‘vertically expander screw’’ (VES) technique as a novel approach for maxillary sinus floor elevation and simultaneous implant placement. Materials and Methods Forty-four patients (26 females, 18 males) received 71 implants with simultaneous transalveolar sinus floor elevation via the VES technique. The threaded bone expanders were used to elevate the sinus floor as well as bone expansion. The patients were followed-up on a regular basis, and final clinical and radiographic examinations were performed at least 24 months following functional loading. Statistical analysis was conducted using the Chi-square test, the correlation coefficient, and the independent t test (p \ 0.05, 95% confidence interval). Results All implants showed successful osseointegration. The mean marginal bone loss (MBL; 0.38 ± 0.75 mm) at the site of premolars was not significantly different from the value at the site of molars (0.17 ± 0.50 mm). The mean intrasinus bone gain (IBG) was not significantly & Reza Amid [email protected] Mahdi Kadkhodazadeh [email protected] Anahita Moscowchi [email protected] Zeinab Zamani [email protected] 1
Dental Research Center, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
2
Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Evin, Tehran, Iran
different (3.47 ± 1.22 mm and 4.11 ± 1.67 mm, respectively; p = 0.92). Evaluation of implant success index (ISI) score revealed no difference between the premolars and molars (p = 0.12). Conclusion Despite the limitations of the present study, it seems that the VES technique and simultaneous implant placement in carefully selected cases may result in promising outcomes. Clinical Relevance Insufficient alveolar bone height and poor bone quality often complicate implant placement in the edentulous posterior maxilla. The VES technique and simultaneous implant placement can bring about favorable clinical and radiographic outcomes and high survival rate in carefully selected cases. Keywords Dental implant Maxillary sinus Simultaneous implantation Sinus floor elevation Sinus lift Minimally invasive surgery
Introduction Implant placement is often challenging in the edentulous posterior maxilla due to insufficient alveolar bone height and poor bone quality [1, 2]. Several methods are currently employed for reconstruction and rehabilitation of atrophic posterior maxilla including the use of tilted implants [3], zygomatic implants [4], and sinus floor elevation. The lateral window or transcrestal maxillary sinus augmentation techniques [5] have been recommended for placement of regu
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