Abstract
Background and objectives: To evaluate whether sinus augmentation, using a minimally invasive implant device, via a non-submerged surgical approach, might negatively influence the outcome. Materials and Methods: A retrospective cohort study was conducted by evaluating patients’ files, classifying them into two groups. Fifty patients (22 men 28 women) were included in the study, 25 in each group. The use of an implant device based on residual alveolar ridge height for sinus augmentation, radiographic evaluation, insertion torque, membrane perforation, post-operative healing, and a minimum of 12 months follow-up were evaluated. Results: The mean residual alveolar ridge height was 5.4 mm for the non-submerged group and 4.2 mm for the submerged group. There were no intraoperative or postoperative complications (including membrane perforations). The mean insertion torque was 45 N/cm for the study group and 20 N/cm for the control group. Complete soft tissue healing was observed within three weeks. Mean bone gain height was 8 mm for the study and 9.3 mm for the control group. All implants osseointegrated after 6–9 months of healing time. Mean follow-up was 17.5 months, range 12–36 months. Marginal bone loss at last follow-up was not statistically significantly different: 1 mm in the non-submerged vs. 1.2 mm in the submerged group. Conclusions: Submerged and non-submerged healing following maxillary sinus augmentation was comparable provided residual alveolar ridge height >5 mm and insertion torque >25 N/cm.
Highlights
The first rule of medicine is "primum non nocere" [1]
The implant length of this device is based on the residual alveolar ridge height (RAH; 13 mm implant length—3–5 mm RAH; 14.5 mm implant length—5–6.5 mm RAH; and 16 mm implant length—6.5–8 mm RAH) [11,12]
A non-submerged approach combined with an implant-device based on residual alveolar ridge height has not been described yet
Summary
The first rule of medicine is "primum non nocere" [1]. Surgery is heading towards minimally invasive intervention resulting in minimal postoperative morbidity, loss of working days, improvedMedicina 2020, 56, 75; doi:10.3390/medicina56020075 www.mdpi.com/journal/medicinaMedicina 2020, 56, 75 healing, and reduced operation time being the main benefits [2,3,4]. Non-submerged implant placement presents a viable alternative to staged placement in implant dentistry [5,6] The prerequisites for such a procedure include sufficient uncompromised bone dimensions in the implantation site and ample initial insertion torque enabling the primary stability of the inserted implant [5,6]. A non-submerged approach combined with an implant-device based on residual alveolar ridge height has not been described yet. The null hypothesis of the present study was that sinus augmentation using a residual alveolar ridge height-based implant device via a non-submerged surgical approach yields results similar to those obtained via a submerged one. To evaluate whether sinus augmentation, using a minimally invasive implant device, via a non-submerged surgical approach, might negatively influence the outcome. The use of an implant device based on residual alveolar ridge height for sinus augmentation, radiographic evaluation, insertion torque, membrane perforation, post-operative healing, and a minimum of 12 months follow-up were evaluated. All implants osseointegrated after 6–9 months of healing time
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