Implant placement with sinus floor elevation via the lateral approach using only absorbable collagen sponge: 12-month po
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ORIGINAL ARTICLE
Implant placement with sinus floor elevation via the lateral approach using only absorbable collagen sponge: 12-month post-loading radiographical outcomes and implant survival rate Gabriel Menassa 1
&
Abdel Rahman Kassir 1 & Luca Landi 2 & Nada Bou Abboud Naaman 1 & Carole Chakar 1
Received: 15 June 2020 / Accepted: 11 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose The purpose of the present study was to evaluate the radiographical outcomes and survival rate of implants placed during graftless lateral sinus lift approach (GLSLA) using an absorbable collagen sponge. Materials and methods Fourteen patients (14 sinus augmentations) were consecutively treated with GLSLA. After Schneiderian membrane elevation and implant insertion, only collagen sponges were used to fill the new sinus compartment. After 4 months of healing, implants were functionally loaded. The radiographical marginal bone variation and apical bone gain were assessed on periapical radiographs taken 4 months after the surgery (at crown insertion) and at 12 months post-loading. Results A total of 41 implants were placed in a mean initial residual bone height of 3.5 mm (range 1.6–6.7 mm). No failure was recorded and all the implants were successfully loaded with fixed prosthesis. Twelve months post-loading the mean radiographic bone remodeling was 2.22 mm. The mean ridge height was 8.4 mm and the mean apical bone gain amounted for 4.4 mm. Conclusions Within the limitations of this study, the placement of dental implants in conjunction with GLSLA using only a collagen sponge to fill the sinus compartment seems to be feasible and accompanied by a high implant survival rate. Further studies on a large population and with a longer follow-up are warranted to drawn definitive conclusions. Keywords Bone remodeling . Blood clot . Collagen sponge . Dental implant . Sinus floor elevation
Introduction After the loss of maxillary molar teeth, a rapid resorption of bone below the maxillary sinus floor occurs. The combination of a decreased residual bone height and a widened maxillary sinus often results in an insufficient bone quantity to place dental implants [1]. Conventionally, a maxillary sinus floor elevation procedure (SFEP) is required before or during implant placement. SFEP was introduced over 30 years ago to manage atrophic posterior edentulous ridges for implant therapy [2, 3]. The safety, predictability, and efficacy of this pro-
* Gabriel Menassa [email protected] 1
Department of Periodontology, Faculty of Dental Medicine, Saint-Joseph University of Beirut, 17-5208, Mar Mikhaël Beyrouth, Beirut, Lebanon
2
Private practice Roma and Verona, Verona, Italy
cedure, joined by a high implant survival rate, have been well documented in the literature [4–6]. Various bone substitutes have been used for this purpose leading to comparable clinical outcomes and implant success [5, 6]. Morbidity of the donor site and a rapid resorption rate are often considered drawbacks to the use of autogenous
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