International Journal of Periodontics & Restorative Dentistry, 4/2017
DOI: 10.11607/prd.2238, PubMed-ID: 28609493Seiten: 490-497, Sprache: Englisch
The aim of this study was to present the use of retroauricular full-thickness skin grafts in vestibuloplasty surgeries for dental implant rehabilitation in vascularized fibula grafts. Two patients underwent mandibular reconstruction with vascularized fibula grafts due to mandibular gunshot injuries. Inadequate sulcus gaps secondary to mandibular soft tissue deficiencies were managed by full-thickness autologous skin grafts harvested from the retroauricular region. Dental rehabilitation was achieved by implants placed in free fibula grafts. In both cases, complete graft survival was achieved. Cosmetic and functional outcomes were satisfactory. Owing to its high resiliency and elasticity and its thin and hairless structure, full-thickness retroauricular skin graft is an effective treatment modality in the management of intraoral soft tissue deficiencies. Patients with gunshot injuries present great functional and esthetic demands, and every report presenting new treatment modalities is helpful in the management of the condition.
International Journal of Periodontics & Restorative Dentistry, 5/2016
DOI: 10.11607/prd.2562, PubMed-ID: 27560678Seiten: 730-735, Sprache: Englisch
The aim of this study was to analyze the primary stability of BoneTrust Sinus implants (BTSIs), which are intended to enable higher primary stability by their special design with reduced thread section in cases of reduced vertical bone availability, in comparison with standard BoneTrust implants (SBTIs) in vitro. A bone window 3 cm in length, 4 cm in width, and 3 cm in depth, resembling the maxillary bone window of the lateral sinus wall with 4 mm of residual bone height, was prepared at the dorsal side of freshly slaughtered bovine ribs. One single BTSI and a single SBTI with the same diameter (4 or 5 mm) were placed in each window. After implant placement, the implant stability quotient (ISQ) was measured by using resonance frequency analysis with an Osstell device. A total of 88 implants were placed. ISQ values varied between 63 and 84. Among the implants with 4-mm diameter, all BTSIs showed higher ISQ values compared with SBTIs. One-way analysis of variance showed a significant difference between BTSIs/SBTIs (P < .05). BTSIs with 4-mm diameter showed statistically higher values compared to BTSIs with 5-mm diameter (P < .05). Among the implants with 5-mm diameter, all SBTIs showed higher ISQ values compared to BTSIs but there was no significant difference. The use of 4-mm-diameter BTSIs could present higher ISQ values during simultaneous implant placement in conjunction with lateral sinus floor augmentation.
International Journal of Periodontics & Restorative Dentistry, 4/2015
DOI: 10.11607/prd.2135, PubMed-ID: 26133144Seiten: 540-547, Sprache: Englisch
This report assesses the results following sinus floor augmentation performed 14 years previously in which bovine bone xenograft material was used without implant insertion. After sinus floor augmentation, using a 20:80 mixture of autogenous bone and inorganic bovine bone material (Bio-Oss), bone biopsy specimens were taken from the grafted site, processed with Donath's sawing and grinding technique, stained with toluidine blue, and mounted on high-sensitivity plates for histology and microradiography. Histologic and microradiographic analysis showed the ingrowth of newly formed bone into the graft with interspersed residual Bio-Oss granules. The percentage of Bio- Oss and newly formed bone was 10.18% and 9.32%, respectively, within a total surface area of 70.61 mm2 at the site of the corresponding missing first molar, and the percentage of Bio-Oss and newly formed bone was 11.47% and 14.96%, respectively, within a total surface area of 63.92 mm2 at the corresponding missing second molar. The newly formed bone was vital without signs of resorption. This study produced strong evidence that newly formed bone was distributed throughout the bone substitute material around all of its granules and that the grafted site consisted of vital bone even in its central parts. The differences in degradation rate and/or whether the effect of bone graft substitutes alone and/ or in combination with other types, shapes, and sizes of graft materials needs further clinical investigation, especially in regard to long-term changes.