Liat Chaushu1, Gavriel Chaushu2, Roni Kolerman1, Marilena Vered3, Sarit Naishlos1, Joseph Nissan4. 1. Department of Pediatric Dentistry, School of Dental Medicine, Tel-Aviv University, Tel-Aviv, Israel. 2. Department of Oral & Maxillofacial Surgery, School of Dental Medicine, Tel Aviv University, Tel-Aviv, Israel. 3. Department of Oral Pathology, School of Dental Medicine, Tel Aviv University, Tel-Aviv, Israel. 4. Department of Oral Rehabilitation, School of Dental Medicine, Tel Aviv University, Tel-Aviv, Israel.
Abstract
BACKGROUND: Bone block grafting may be required to restore the alveolar process prior to implant placement in Kennedy Class IV partial edentulism of the anterior mandible. PURPOSE: Evaluate the application of allograft cancellous bone blocks for the augmentation of the anterior atrophic mandible. MATERIALS AND METHODS: Fourteen consecutive patients underwent augmentation with cancellous bone block allografts in the anterior mandible. A bony deficiency of at least 3 mm horizontally and up to 3 mm vertically according to computerized tomography para-axial reconstruction served as inclusion criteria. Following 6 months, 26 implants were placed and a cylindrical sample core was collected. All specimens were prepared for histological and histomorphometrical examination. The rehabilitation scheme was two dental implants, placed in the lateral incisor area, supporting a 4-unit implant-supported prosthesis. RESULTS: Twenty-four blocks were placed in 14 patients. Mean follow-up was 26 ± 17 months. Mean bone gain was 5 ± 0.5 mm horizontally, and 2 ± 0.5 mm vertically. Twenty-six implants were used. Marginal bone loss at last follow up did not extend beyond the first thread. Block and implant survival rates were 91.6% and 100%, respectively. All patients but one received a fixed implant-supported prosthesis. Histomorphometrically, the mean fraction of the newly formed bone was 42%, that of the residual cancellous block-allograft 17%, and of the marrow and connective tissue 41%. CONCLUSIONS: The potential of cancellous bone block allografts for reconstruction of Kennedy Class IV partial edentulism in the anterior mandible seems promising but still has to be evaluated scientifically in long-term observations.
BACKGROUND: Bone block grafting may be required to restore the alveolar process prior to implant placement in Kennedy Class IV partial edentulism of the anterior mandible. PURPOSE: Evaluate the application of allograft cancellous bone blocks for the augmentation of the anterior atrophic mandible. MATERIALS AND METHODS: Fourteen consecutive patients underwent augmentation with cancellous bone block allografts in the anterior mandible. A bony deficiency of at least 3 mm horizontally and up to 3 mm vertically according to computerized tomography para-axial reconstruction served as inclusion criteria. Following 6 months, 26 implants were placed and a cylindrical sample core was collected. All specimens were prepared for histological and histomorphometrical examination. The rehabilitation scheme was two dental implants, placed in the lateral incisor area, supporting a 4-unit implant-supported prosthesis. RESULTS: Twenty-four blocks were placed in 14 patients. Mean follow-up was 26 ± 17 months. Mean bone gain was 5 ± 0.5 mm horizontally, and 2 ± 0.5 mm vertically. Twenty-six implants were used. Marginal bone loss at last follow up did not extend beyond the first thread. Block and implant survival rates were 91.6% and 100%, respectively. All patients but one received a fixed implant-supported prosthesis. Histomorphometrically, the mean fraction of the newly formed bone was 42%, that of the residual cancellous block-allograft 17%, and of the marrow and connective tissue 41%. CONCLUSIONS: The potential of cancellous bone block allografts for reconstruction of Kennedy Class IV partial edentulism in the anterior mandible seems promising but still has to be evaluated scientifically in long-term observations.
Authors: Ilya L Tsiklin; Evgeniy I Pugachev; Alexandr V Kolsanov; Elena V Timchenko; Violetta V Boltovskaya; Pavel E Timchenko; Larisa T Volova Journal: Polymers (Basel) Date: 2022-02-26 Impact factor: 4.329
Authors: Ralf Smeets; Levi Matthies; Peter Windisch; Martin Gosau; Ronald Jung; Nadine Brodala; Martina Stefanini; Johannes Kleinheinz; Michael Payer; Anders Henningsen; Bilal Al-Nawas; Christian Knipfer Journal: Int J Implant Dent Date: 2022-05-09