A retrospective 10-year mean follow-up of implants placed in ridges grafted using autogenous mandibular blocks covered with bovine bone mineral and collagen membrane

Matteo Chiapasco, Grazia Tommasato, David Palombo, Massimo Del Fabbro

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OBJECTIVES: to report the clinical and radiographic outcomes of patients presenting with edentulous and atrophic ridges and treated with autogenous mandibular bone blocks and rehabilitated with implant-supported prostheses.

MATERIALS AND METHODS: from 1997 to 2015, 75 patients presenting with bone defects of the jaws were grafted with autogenous mandibular bone blocks. One-hundred-eighty-two implants were placed 4 to 12 months later and loaded 3 to 10 months later: the mean follow-up was 10 years (range: 3-16 years). The following outcomes were recorded: a) complication rate of the reconstructive procedure; b) bone graft resorption before implant placement; c); peri-implant bone resorption; d) implant-related complications; e) implant survival and success rates.

RESULTS: Post-operative recovery was uneventful in the majority of patients. An early dehiscence occurred in three patients, but with no significant bone loss, while 3 experienced temporary paresthesia. The mean vertical and horizontal bone resorption before implant placement was 0.18 mm (standard deviation (SD)=0.43) and 0.15 mm (SD=0.42), respectively. The mean peri-implant bone loss ± standard deviation was 1.06±1.19 (range 0.00 to 5.05) at patient level, and 1.11±1.26 (range 0.00 to 5.20) at implant level. Two implants in 2 patients lost integration and were removed; 10 implants in 7 patients developed peri-implantitis, but healed after surgical treatment. The cumulative implant survival and success rates were 98.11% and 85.16%, respectively.

CONCLUSION: implants placed in areas reconstructed with mandibular bone blocks presented survival rates consistent with those obtained for implants placed in native bone.

Original languageEnglish
JournalClinical Oral Implants Research
Publication statusE-pub ahead of print - Jan 2 2020


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