{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T09:40:46Z","timestamp":1786700446095,"version":"build-2736575974"},"reference-count":30,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T00:00:00Z","timestamp":1786665600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Funct. Biomater.","JFB"],"abstract":"<jats:p>Background: Autologous dentin has emerged as a potential grafting material in regenerative oral surgery because of its structural and biological similarities to bone. This technical report describes a modified tooth-shell technique used for horizontal ridge reconstruction with simultaneous implant placement in two clinical cases involving the aesthetic zone. Case Presentation: The first case involved a 29-year-old female patient requiring extraction of a partially impacted, buccally positioned maxillary third molar (tooth 28). The extracted tooth was processed intraoperatively to obtain a dentin shell, which was fixed as a buccal plate during simultaneous implant placement. The remaining defect was filled with sticky bone prepared from biphasic calcium phosphate combined with platelet-rich fibrin. Radiographic evaluations performed at 4 and 6 months demonstrated stable ridge contours, while clinical follow-up continued for 2 years with maintenance of implant function and peri-implant tissue stability. The second case involved a 58-year-old female patient with a previous failure of immediate implantation in the anterior maxilla associated with implant overload, loss of implant stability, and buccal bone deficiency. After soft- and hard-tissue healing, ridge reconstruction was performed using a dentin shell prepared from tooth 18 together with simultaneous implant placement and immediate provisional restoration. Follow-up after 6 months revealed stable peri-implant tissues, a satisfactory aesthetic outcome, and successful prosthetic rehabilitation. Conclusions: The modified tooth-shell technique using autologous dentin provided satisfactory preliminary clinical and radiographic outcomes in both cases. These findings should be considered hypothesis-generating and require confirmation in larger prospective studies with longer follow-up periods.<\/jats:p>","DOI":"10.3390\/jfb17080402","type":"journal-article","created":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T09:04:01Z","timestamp":1786698241000},"page":"402","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["An Autologous Tooth-Shell Technique for Ridge Reconstruction and Immediate Implant Placement: A Two-Case Technical Report and Review of the Literature"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-4729-1217","authenticated-orcid":false,"given":"Jan","family":"\u0141o\u015b","sequence":"first","affiliation":[{"name":"Laboratory of Tissue Engineering and Regenerative Medicine, Division of Embryology, Faculty of Medicine, Medical University of Gdansk, 80-210 Gdansk, Poland"},{"name":"Dental Clinic Potokowa, 80-283 Gdansk, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justyna","family":"Sza\u0142kowska-\u0141o\u015b","sequence":"additional","affiliation":[{"name":"Dental Clinic Happy Smile, 80-369 Gdansk, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7751-9781","authenticated-orcid":false,"given":"Micha\u0142","family":"Piku\u0142a","sequence":"additional","affiliation":[{"name":"Laboratory of Tissue Engineering and Regenerative Medicine, Division of Embryology, Faculty of Medicine, Medical University of Gdansk, 80-210 Gdansk, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0514-4997","authenticated-orcid":false,"given":"Paulina","family":"Adamska","sequence":"additional","affiliation":[{"name":"Division of Oral Surgery and Implantology, Faculty of Medicine, Medical University of Gdansk, 80-210 Gdansk, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1111\/prd.12185","article-title":"Modern implant dentistry based on osseointegration: 50 years of progress, current trends and open questions","volume":"73","author":"Buser","year":"2017","journal-title":"Periodontology 2000"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1111\/prd.12167","article-title":"Clinical relevance of dimensional bone and soft tissue alterations post-extraction in esthetic sites","volume":"73","author":"Chappuis","year":"2017","journal-title":"Periodontology 2000"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"639","DOI":"10.11607\/prd.3200","article-title":"Principles for vertical ridge augmentation in the atrophic posterior mandible: A technical review","volume":"37","author":"Urban","year":"2017","journal-title":"Int. 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