Segmental sandwich osteotomy of the posterior mandible in pre-implant surgery - A systematic review

Abstract

BackgroundThe rehabilitation of the atrophic posterior mandible with dental implants often requires bone augmentation procedures. The aim of the present study is the systematic review of the literature concerning the success rate of Segmental Sandwich Osteotomy (SSO) of the posterior mandible in pre-implant surgery.Material and MethodsSystematic review of all clinical cases and clinical studies of SSO of the posterior mandible in pre-implant surgery with a minimum follow-up of 6 months after implant loading was performed, based on specific inclusion and exclusion criteria. The search strategy involved searching the electronic databases of MEDLINE, EMBASE, COCHRANE LIBRARY, Clinical Trials (www.clinicaltrials.gov) and National Research Register (www.controlled-trials.com), supplemented by a manual search, in August 2015. In every study, the intervention characteristics and the outcome were recorded.ResultsOut of the 756 initial results, only 17 articles fulfilled the predetermined inclusion and exclusion criteria. They consisted of 9 retrospective case reports or series and 8 prospective randomized clinical trials. Overall, the studies included 174 patients. In these patients, 214 SSO augmentation procedures were performed in the posterior mandible and 444 implants were placed. The follow-up period after implant loading ranged between 8 months and 5.5 years. The success rate of SSO ranged between 90% and 100%. The implant survival during the follow-up period ranged between 90.9% and 100%.ConclusionsSegmental Sandwich Osteotomy should be considered as a well documented technique for the rehabilitation of the atrophic posterior mandible, with long-term postsurgical follow-up. The success rates are very high, as well as the survival of the dental implants placed in the augmented area. Key words:Segmental osteotomy, dental implant, mandible, inlay graft.

Sandwich osteotomy in atrophic mandibles: A retrospective study with a 2‐ to 144‐month follow‐up

“…An average of 4.8 mm bone height gain above the mandibular nerve was obtained in partial edentulism. The bone gain fell within the range of 4–8 mm in other investigations focusing on sandwich osteotomy in posterior mandible (Kamperos et al, ). In anterior region, bone gain of 6–10 mm was reported in partially edentulous cases (Bormann et al, ; Herford et al, ; Kao et al, ; Laviv et al, ; Moon et al, ).…”

“…Sandwich osteotomy for alveolar augmentation was introduced by Schettler et al in the late 1970s, to improve the retention of a full denture in mandible without dental implants (Schettler & Holtermann, ). The major advantage of sandwich osteotomy is the adequate vascularization guaranteed by two osteotomized bone surfaces and the intact lingual mucoperiosteum (Kamperos, Zografos, Tzermpos, & Iatrou, ). In existing literature, sandwich osteotomy in the posterior was mostly described to overcome the inadequate bone height above the mandibular nerve (Bormann et al, , ; Jensen, ; Laviv, Jensen, Tarazi, & Casap, ; Lopez‐Cedrun, ; Marchetti, Trasarti, Corinaldesi, & Felice, ).…”

Maxillary vertical alveolar ridge augmentation using sandwich osteotomy technique with simultaneous versus delayed implant placement: A proof of principle randomized clinical trial

“…These results are comparable to those described in the literature, ranging from 3-6 mm of bone gain. [16][17][18][28][29][30][31][32] Nevertheless, Rachmiel and colleagues reported a mean vertical bone gain of 7.5 mm in their retrospective study of 21 patients that underwent the sandwich osteotomy procedure with a median follow up period of 3.1 years. 33 While Jensen and colleagues claimed that the procedure can produce up to 10 mm of vertical bone gain, but advised to limit the amount of down fracture in the maxilla to 5 mm to avoid jeopardizing the blood supply to the bone segment and the graft.…”

Sandwich osteotomy with interpositional grafts for vertical augmentation of the mandible

“…[ 1 2 ] In the mandible, the most frequent consequence of bone resorption is an inadequate bone height above the inferior alveolar nerve complicating implant placement. [ 3 ]…”