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Alqahtani AR, Desai SR, Patel JR, Alqhtani NR, Alqahtani AS, Heboyan A, Fernandes GVO, Mustafa M, Karobari MI. Investigating the impact of diameters and thread designs on the Biomechanics of short implants placed in D4 bone: a 3D finite element analysis. BMC Oral Health 2023; 23:686. [PMID: 37740190 PMCID: PMC10517556 DOI: 10.1186/s12903-023-03370-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 08/30/2023] [Indexed: 09/24/2023] Open
Abstract
BACKGROUND Dental implants emerge as a dependable and efficacious alternative for patients experiencing partial or complete tooth loss. The stability of these implants is influenced by surface topography and macro-level design. In cases where the height of the maxillary posterior region is diminished, employing short implants can prove advantageous. With the aim of examining the distribution of von Mises stress, strain, and micromovement in D4 bone quality surrounding platform-switched short implants, measuring 6 mm in length and featuring diameters ranging from 4 to 6 mm, as well as different thread designs, an in-depth finite element analysis was conducted under immediate loading conditions. METHODOLOGY A 3D finite element model was constructed to simulate maxillary molar crowns, incorporating an implant with a length of 6 mm and varying diameters and thread designs. The diameters utilized were 4/3.6 mm, 5/4 mm, and 6/4.8 mm, while the thread designs included buttress, square, and triangle patterns. Each model underwent analysis with a 100 N force applied in two directions: vertical and oblique, relative to the long axis of the implant. Stress, strain, and micromovement in the peri-implant region were recorded, employing the Ansys Workbench R v.18.1 software for modelling and analysis. RESULTS When comparing all three diameters, the wide diameter (6 mm threads) exhibited the lowest values of peri-implant von Mises stresses (3.3 MPa and 35.1 MPa), strains (194 Ɛ and 484 Ɛ), and micromovements (0.7 μm and 1.3 Ɛ) subjected to axial and non-axial loading of a 100 N force. Notably, square microthreads yielded the most favorable stress parameters among the different thread shapes, manifesting the minimum values of stress, strains, and micromovements in their vicinity. CONCLUSION For the treatment of atrophic ridges or in scenarios necessitating extensive surgical preparation of the implant site, a combination of short implants, wide diameters, and platform switching can be employed. In situations with reduced bone height and the requirement for an implant-supported prosthesis to replace a missing permanent maxillary molar, the utilization of wide-diameter platform-switched short implants measuring 6 mm in length, featuring a square thread design, should be taken into consideration.
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Affiliation(s)
- Ali Robaian Alqahtani
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942 Saudi Arabia
| | - Shrikar R. Desai
- Department of Periodontology and Implantology, HKE’S S. Nijalingappa Institute of Dental Sciences and Research, Kalaburagi, 585105 India
| | - Jignesh R. Patel
- Dr. Patel’s Specialty Dental Care, 203, Silver Empire, Opposite Utran Power House Gate, VIP Circle, Utran, 394107 Surat India
| | - Nasser Raqe Alqhtani
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942 Saudi Arabia
| | - Abdullah Saad Alqahtani
- Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942 Saudi Arabia
| | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University, Mkhitar Heratsi, Str. Koryun 2, Yerevan, 0025 Armenia
| | - Gustavo V. O. Fernandes
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, 1011 North University Ave, Ann Arbor, MI 48109 USA
| | - Mohammed Mustafa
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942 Saudi Arabia
| | - Mohamed Isaqali Karobari
- Department of Restorative Dentistry & Endodontics, Faculty of Dentistry, University of Puthisastra, 12211 Phnom Penh, Cambodia
- Center for Global health Research, Saveetha Institute of Medical and Technical Sciences, Saveetha Medical College and Hospitals, Saveetha University, Kuthambakkam, India
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De Stefano M, Lanza A, Faia E, Ruggiero A. A distinct ultrashort dental implant design for the reduction of the bone stress/strain field: a comparative numerical investigation. BIOMEDICAL ENGINEERING ADVANCES 2023. [DOI: 10.1016/j.bea.2023.100077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Mariani E, Pulsatelli L, Cattini L, Dolzani P, Assirelli E, Cenacchi A, Di Martino A, Arciola CR, Filardo G. Pure Platelet and Leukocyte-Platelet-Rich Plasma for Regenerative Medicine in Orthopedics-Time- and Preparation-Dependent Release of Growth Factors and Effects on Synovial Fibroblasts: A Comparative Analysis. Int J Mol Sci 2023; 24:ijms24021512. [PMID: 36675025 PMCID: PMC9867505 DOI: 10.3390/ijms24021512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/14/2023] Open
Abstract
Intra-articular injections of autologous platelet concentrates are considered capable to enhance the healing of cartilage lesions, alleviate joint inflammation, and relieve other musculoskeletal pathological conditions. The aim of this study was to analyze the soluble fractions obtained from platelet-rich plasma (pure- and leukocyte-PRP) to compare time- and preparation-dependent modifications of growth factor concentrations and the supporting activity of the two preparations on synovial fibroblast growth and hyaluronic acid (HA) production in vitro. The release kinetics of FGF-2, SDF-1, VEGF, HGF, EGF, PD GF-AB/BB, IGF-1, VCAM-1, and TGF-β isoforms were followed up to 168 h after PRP activation, and their amounts were determined by multiplex-beads immunoassay. Synovial cell growth and supernatant HA production were respectively analyzed by Alamar Blue assay and ELISA. Time-dependent modifications grouped molecules in three peculiar patterns: one reaching the highest concentrations within 18 h and decreasing afterwards, another progressively increasing up to 168 h, and the last peaking at the central time points. Synovial fibroblast growth in response to L-PRP and P-PRP revealed differences over time and among added concentrations. Both preparations displayed a preserved supporting capacity of HA synthesis.
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Affiliation(s)
- Erminia Mariani
- Department of Medical and Surgical Sciences, Alma Mater Studiorum-Università di Bologna, 40138 Bologna, Italy
- Laboratory of Immunorheumatology and Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Lia Pulsatelli
- Laboratory of Immunorheumatology and Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
- Correspondence: ; Tel.: +39-0516366803 or +39-0516366808
| | - Luca Cattini
- Laboratory of Immunorheumatology and Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Paolo Dolzani
- Laboratory of Immunorheumatology and Tissue Regeneration, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Elisa Assirelli
- Medicine and Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Annarita Cenacchi
- Single Metropolitan Transfusion Service, AUSL Bo, 40136 Bologna, Italy
| | - Alessandro Di Martino
- Clinica Ortopedica e Traumatologica 2, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Carla Renata Arciola
- Department of Medical and Surgical Sciences, Alma Mater Studiorum-Università di Bologna, 40138 Bologna, Italy
- Laboratorio di Patologia delle Infezioni Associate all’Impianto, Laboratorio di Immunoreumatologia e Rigenerazione Tissutale, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Giuseppe Filardo
- Applied and Translational Research Center, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
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Anitua E, Larrazabal Saez de Ibarra N, Saracho Rotaeche L. Implant-Supported Prostheses in the Edentulous Mandible: Biomechanical Analysis of Different Implant Configurations via Finite Element Analysis. Dent J (Basel) 2022; 11:dj11010004. [PMID: 36661541 PMCID: PMC9858073 DOI: 10.3390/dj11010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/28/2022] Open
Abstract
This study explores the implant-supported prosthetic treatment alternatives of the edentulous mandible from a biomechanical point of view by means of a Finite Element Analysis (FEA). Finite element (FE) models were used to simulate cases treated with six, five, and four, implants and a fixed prosthesis with a cantilever. In the four implant treatments, three cases were analyzed; the posterior implants were placed in axial positions, angled at 30° and 45°. Cases with six and four axially placed implants were also analyzed by placing the posterior implants distally to the foramen, thus eliminating the cantilever in the prostheses. In the cases with implants between foramina, the highest values for the principal strains and von Mises stresses were observed in the case with four implants where the posterior implants were angled at 45°. Cases with implants placed distally to the foramen and without a cantilever showed much lower bone stress and strain levels compared to cases with implants between foramina. From a biomechanical point of view, it seems to be a better option to use implants positioned distally to the foramen, eliminating cantilevers.
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Pardo-Zamora G, Ortiz-Ruíz AJ, Camacho-Alonso F, Martínez-Marco JF, Molina-González JM, Piqué-Clusella N, Vicente-Hernández A. Short Dental Implants (≤8.5 mm) versus Standard Dental Implants (≥10 mm): A One-Year Post-Loading Prospective Observational Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18115683. [PMID: 34073250 PMCID: PMC8199359 DOI: 10.3390/ijerph18115683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/23/2021] [Accepted: 05/24/2021] [Indexed: 11/25/2022]
Abstract
Background: Recent data have shown that short dental implants can be the preferred treatment in most of cases of posterior atrophic alveolar ridges, offering higher survival and lower complication rates than long implants. The survival rates, stability, and marginal bone level changes were compared between short implants (7 and 8.5 mm) and standard-length implants (≥10 mm). Methods: Prospective observational study in which adult patients requiring ≥1 osseointegrated implants to replace missing teeth were recruited consecutively. A clinical examination was performed on the day the definitive prosthesis was placed and after 6 and 12 months. Implant stability quotient (ISQ), marginal bone level (MBL) changes, and the correlation between these parameters and the characteristics of the implants were evaluated. Results: A total of 99 implants were inserted (47 short, 52 standard) in 74 patients. The 12-month survival rate was 100%. ISQ values showed a similar pattern for both types of implants. No correlation was found between ISQ changes after one year and MBL values, nor between the latter and the characteristics of the implants. Conclusions: With clinical treatment criteria, shorter implants (7 and 8.5 mm in length) can be just as useful as standard-length implants in atrophic alveolar ridges, demonstrating similar rates of survival, stability, and crestal bone loss.
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Affiliation(s)
- Guillermo Pardo-Zamora
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
- Correspondence: ; Tel.: +34-606-064-848
| | - Antonio José Ortiz-Ruíz
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
| | - Fabio Camacho-Alonso
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
| | - José Francisco Martínez-Marco
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
| | - Juan Manuel Molina-González
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
| | - Núria Piqué-Clusella
- Microbiology Section, Department of Biology, Healthcare and Environment, Faculty of Pharmacy and Food Sciences, Universitat de Barcelona (UB), Av Joan XXIII, 27-31, 08028 Barcelona, Spain;
| | - Ascensión Vicente-Hernández
- Department of General Dentistry and Implants, Faculty of Medicine and Dentistry, University of Murcia, 30008 Murcia, Spain; (A.J.O.-R.); (F.C.-A.); (J.F.M.-M.); (J.M.M.-G.); (A.V.-H.)
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Anitua E, Troya M, Zalduendo M, Flores J, Tierno R, Alkhraisat MH. The influence of alveolar bone healing degree on its potential as a source of human alveolar bone-derived cells. Ann Anat 2020; 232:151578. [PMID: 32688020 DOI: 10.1016/j.aanat.2020.151578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 06/16/2020] [Accepted: 06/29/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND The concept of bone tissue engineering has emerged as a novel alternative approach that comprises three essential components: osteogenic cells, osteoinductive signals and osteoconductive scaffolds. The low-speed drilling represents a useful and accessible autologous source for human alveolar bone-derived cells (hABCs). The aim of this study was to compare the efficacy of two donor sites (healing sites (HS) and non-augmented healed sites (NAHS)) as a source of hABCs. METHODS Nineteen patients were enrolled in this study. The patients' demographic data were described. Bone type and dental implant location were also determined. The hABCs obtained were characterized. Apoptosis and sclerostin expression in the samples were also assessed with immunohistochemistry. RESULTS The hABCs left earlier the tissue explants of the HS than the NAHS. The proliferation of the hABCs had reached the sub-confluence stage in both groups. Cellular efficacy was not statistically significant between the two groups. The hABCs exhibited osteogenic phenotype as they expressed bone sialoprotein (BSP), osteopontin (OP) and tissue non-specific alkaline phosphatase (TNAP). In both groups, the level and the distribution pattern of apoptotic cells and sclerostin expression were similar. CONCLUSIONS Within the limitations of this study, both HS and NAHS were similarly effective to provide hABCs.
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Affiliation(s)
- Eduardo Anitua
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain; BTI - Biotechnology Institute, Vitoria, Spain.
| | - María Troya
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain; BTI - Biotechnology Institute, Vitoria, Spain
| | - Mar Zalduendo
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain; BTI - Biotechnology Institute, Vitoria, Spain
| | - Javier Flores
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain
| | - Roberto Tierno
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain; BTI - Biotechnology Institute, Vitoria, Spain
| | - Mohammad Hamdan Alkhraisat
- University Institute for Regenerative Medicine and Oral Implantology (UIRMI), Vitoria, Spain; BTI - Biotechnology Institute, Vitoria, Spain
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Arslan YZ, Karabulut D, Kahya S, Cansiz E. Biomechanical comparison of implantation approaches for the treatment of mandibular total edentulism. Proc Inst Mech Eng H 2020; 234:1139-1150. [PMID: 32686574 DOI: 10.1177/0954411920943427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Applying four anterior implants placed vertically or tilted in the mandible is considered to provide clinically reasonable results in the treatment of mandibular posterior edentulism. It is also reported that a combination of four anterior and two short posterior implants can be an alternative approach for the rehabilitation of severe atrophy cases. In this study, we aimed to evaluate the biomechanical responses of three different implant placement configurations, which represent the clinical options for the treatment of mandibular edentulism. Three-dimensional models of the mandible, prosthetic bar, dental implant, abutment, and screw were created. Finite element models of the three implant configurations (Protocol 1: Four anterior implants, Protocol 2: Four anterior and two short posterior implants, Protocol 3: Two anterior and two tilted posterior implants: All-on-4™ concept) were generated for 10 patients and analyzed under different loading conditions including chewing, biting, and impact forces. Protocol 2 led to the lowest stress concentrations over the mandible among the three protocols (p < 0.016). Protocol 2 resulted in significantly lower stresses than Protocol 3 and Protocol 1 over prosthetic bars under chewing forces (p < 0.016). None of the implant placement protocols consistently exhibited the lowest stress distribution over abutments. The lowest stresses over dental implants under the chewing, biting, and impact forces were obtained in Protocol 1, Protocol 2, and Protocol 3, respectively (p < 0.016). Protocol 3 was the best option to obtain the lowest stress values over the screws under all types of loading conditions (p < 0.016). In conclusion, Protocol 2 was biomechanically more ideal than Protocol 1 and Protocol 3 to manage the posterior edentulism.
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Affiliation(s)
- Yunus Ziya Arslan
- Faculty of Engineering, Department of Mechanical Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Derya Karabulut
- Faculty of Engineering, Department of Mechanical Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Songul Kahya
- Faculty of Engineering, Department of Mechanical Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Erol Cansiz
- Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul University, Istanbul, Turkey
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Malchiodi L, Ricciardi G, Salandini A, Caricasulo R, Cucchi A, Ghensi P. Influence of crown–implant ratio on implant success rate of ultra-short dental implants: results of a 8- to 10-year retrospective study. Clin Oral Investig 2020; 24:3213-3222. [DOI: 10.1007/s00784-020-03195-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 01/03/2020] [Indexed: 11/30/2022]
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Suk-Arj P, Wongchuensoontorn C, Taebunpakul P. Evaluation of bone formation following the osteotome sinus floor elevation technique without grafting using cone beam computed tomography: a preliminary study. Int J Implant Dent 2019; 5:27. [PMID: 31367919 PMCID: PMC6669224 DOI: 10.1186/s40729-019-0181-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 07/04/2019] [Indexed: 01/03/2023] Open
Abstract
Background Osteotome sinus floor elevation (OSFE) is used to increase the bone volume at the site of the maxillary sinus through the transalveolar approach. However, there is uncertainty regarding the necessity of the use of grafting material in order to maintain the space for new bone formation. Objective This study aimed to evaluate new bone formation 6 months after osteotome sinus floor elevation without grafting and to evaluate the correlations between residual bone height (RBH), implant protrusion length (IPL), and endo-sinus bone gain (ESBG). Material and methods Thirty-one implants (27 patients) from area 14–17 and 24–27 were included in the study. All implants had a history of OSFE without grafting, with cone beam computed tomography (CBCT) taken prior to the surgery. The clinical examination and radiographic examination using CBCT were performed again 6 months after implantation. The RBH, new bone level, ESBG, and IPL were measured. Paired sample t test and Pearson correlation were used to analyze the data. Results The average RBH before surgery was 7.14 ± 1.07 mm and 6 months after surgery was 8.95 ± 1.17 mm. There was a significant increase in new bone formation in the 6 months following surgery (p < 0.05). The average ESBG and IPL were 1.8 ± 0.79 mm and 2.02 ± 0.73 mm, respectively. There was a significant positive correlation between the IPL and ESBG (p < 0.05) while there was a negative correlation between RBH and ESBG. This study also demonstrates a decrease in the percentage of bone formation in relation to IPL as the IPL increases. The survival rate of the implant was 100%. Conclusion Significant new bone formation can be detected around the implant site 6 months after implantation using OSFE technique without grafting. There is a negative correlation between the RBH and ESBG. While IPL is correlated to ESBG and appears to be the influencing factors of bone formation changes in the maxillary sinus. The preliminary radiographic results suggest that OSFE technique without grafting in combination with optimal IPL can provide sufficient bone height for implant support with a 100% implant survival rate. Electronic supplementary material The online version of this article (10.1186/s40729-019-0181-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Panapohn Suk-Arj
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - Chanchai Wongchuensoontorn
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - Patrayu Taebunpakul
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand.
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Anitua E. Implantes extracortos en mandíbulas con extrema reabsorción vertical: serie de casos. ACTA ODONTOLÓGICA COLOMBIANA 2019. [DOI: 10.15446/aoc.v9n1.74251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Introducción: el uso de los implantes extracortos permite la rehabilitación de extremas reabsorciones. Esto obliga en ocasiones a la utilización de prótesis sobre los mismos con una proporción corona-implante desfavorable llegando a ratios de 2:1 o de 3:1 en los casos más extremos. Materiales y métodos: se realizó un análisis de casos clínicos donde se insertaron implantes extracortos con un reborde residual (menor o igual a 5,5mm) y tiempo de carga mínimo de seis meses. Se realizó una prueba de chi-cuadrado para las variables categóricas y una t de Student para las variables continuas. Posteriormente, se realizaron modelos de regresión lineal ajustados. Resultados: fueron reclutados seis casos a los que se les insertaron implantes extracortos. El 21,2% de los pacientes incluidos en el estudio fueron hombres y el 78,8% mujeres, con una edad media de 57 años. La proporción corona-implante medio fue de 3,19 (+/- 0,24). La media de la pérdida ósea mesial de los implantes estudiados fue de 0,86mm (+/- 0,33) y la media de la pérdida ósea prodistal fue de 0,83mm (+/- 0,47). Cuando se analizó la pérdida ósea mesial y distal en función proporción no se encontraron diferencias estadísticamente significativas (p=0,224). Conclusiones: el uso de implantes extracortos no es un factor de riesgo para la pérdida ósea crestal o para el fracaso de la prótesis o del implante según los datos aportados por este estudio aun cuando la proporción corona-implante sea superior a tres.
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Rosa EC, Do Nascimento TCDL, Sebastiani AM, Scariot R, Deliberador TM, Zielak JC, Florez FLE, Storrer CLM. All-On-Four Protocol With Immediate Load on Short Implants in an Atrophic Mandible: A Case Report with a 4-Year Follow-Up. Open Dent J 2018. [DOI: 10.2174/1874210601812011004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Purpose:
Edentulism has been demonstrated to have negative social and psychological effects on individuals that include adverse impacts on facial and oral esthetics, masticatory function and speech abilities, that when combined, are translated into significant reductions in patients’ quality of lives. It is well-known that immediate placement of implants is a challenging surgical procedure that requires proper treatment planning and surgical techniques. Therefore, the present study describes a 4-year follow-up case report where short implants were placed in an atrophic mandibule and were loaded with the utilization of an all-on-four prosthetic protocol.
Case report:
A 54 year-old woman dissatisfied with her oral and facial esthetics, masticatory function and speech ability came to the implantology clinic of the Positivo University seeking for oral rehabilitation treatment. After detailed physical and clinical examination, a Computer Tomography scan (CT-scan) was performed to determine the patient’s bone ridge density, dimensions and eligibility for the placement of dental implants. The CT-scan results have indicated the presence of an extremely atrophic mandibular bone ridge. The CT-scan was also used as an aid during the final restoration treatment planning in terms of vertical dimension of occlusion, masticatory function, and stabilization of the lower denture. An all-on-four protocol supported by short implants was then treatment-planned to reduce time, costs and morbidity, and also to achieve superior immediate esthetic results and masticatory function. To reconstruct the patient’s atrophic edentulous mandibule, 4 short implants, including 2 distally tilted, were placed with a final torque of 45 Ncm.
Results:
Following the development and implementation of a complex treatment plan, the patient displayed stable soft and hard tissues at 4-year postoperative follow-up assessment, demonstrating the effectiveness of the all-on-four technique supported by short implants.
Conclusion:
Within the limits of this study, the present case report demonstrated that the all-on-four prosthetic protocol with immediate loading on short implant was effective in an atrophic mandible over a 4-year follow-up.
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Edher F, Nguyen CT. Short dental implants: A scoping review of the literature for patients with head and neck cancer. J Prosthet Dent 2017; 119:736-742. [PMID: 28927926 DOI: 10.1016/j.prosdent.2017.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 06/06/2017] [Accepted: 06/08/2017] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Dental implants can be essential in the rehabilitation of various cancer defects, but their ideal placement can be complicated by the limited dimensions of the available host bone. Surgical interventions developed to increase the amount of bone are not all predictable or successful and can sometimes be contraindicated. Short dental implants have been suggested as an alternative option in sites where longer implants are not possible. Whether they provide a successful treatment option is unclear. PURPOSE The purpose of this study was to review the literature on short dental implants and assess whether they are a viable definitive treatment option for rehabilitating cancer patients with deficient bone. MATERIAL AND METHODS A scoping review of the literature was performed, including a search of established periodontal textbooks for articles on short dental implants combined with a search of PubMed, MEDLINE, EMBASE, Web of Science, and Cochrane Database of Systematic Reviews. A search for all literature published before June 2016 was based on the following keywords: ['dental implants' OR 'dental implantation, endosseous' OR 'dental prosthesis, implant supported'] AND [short]. RESULTS The minimum acceptable implant length has been considered to be 6 mm. The survival rates of short implants varied between 74% and 96% at 5 years, depending on factors such as the quality of the patient's bone, primary stability of the implant, clinician's learning curve, and implant surface. Short implants can achieve results similar to those of longer implants in augmented bone and offer a treatment alternative that could reduce the need for invasive surgery and associated morbidity and be safer and more economical. CONCLUSIONS Short dental implants (6 mm to 8 mm) can be used successfully to support single or multiple fixed reconstructions or overdentures in atrophic maxillae and mandibles. The use of short dental implants lessens the need for advanced and complicated surgical bone augmentation procedures, which reduces complications, costs, treatment time, and morbidity. Short implants could be an alternative in the rehabilitation of patients with cancer.
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Affiliation(s)
- Faraj Edher
- Graduate student, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Caroline T Nguyen
- Assistant Professor, Department of Oral Health Sciences, University of British Columbia; and Provincial Practice Leader in Prosthodontics, Department of Oral Oncology and Dentistry, British Columbia Cancer Agency, Vancouver, British Columbia, Canada.
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Esfahrood ZR, Ahmadi L, Karami E, Asghari S. Short dental implants in the posterior maxilla: a review of the literature. J Korean Assoc Oral Maxillofac Surg 2017; 43:70-76. [PMID: 28462189 PMCID: PMC5410430 DOI: 10.5125/jkaoms.2017.43.2.70] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/24/2016] [Accepted: 05/04/2016] [Indexed: 01/03/2023] Open
Abstract
The purpose of this study was to perform a literature review of short implants in the posterior maxilla and to assess the influence of different factors on implant success rate. A comprehensive search was conducted to retrieve articles published from 2004 to 2015 using short dental implants with lengths less than 10 mm in the posterior maxilla with at least one year of follow-up. Twenty-four of 253 papers were selected, reviewed, and produced the following results. (1) The initial survival rate of short implants in the posterior maxilla was not related to implant width, surface, or design; however, the cumulative success rate of rough-surface short implants was higher than that of machined-surface implants especially in performance of edentulous dental implants of length <7 mm. (2) While bone augmentation can be used for rehabilitation of the atrophic posterior maxilla, short dental implants may be an alternative approach with fewer biological complications. (3) The increased crown-to-implant (C/I) ratio and occlusal table (OT) values in short dental implants with favorable occlusal loading do not seem to cause peri-implant bone loss. Higher C/I ratio does not produce any negative influence on implant success. (4) Some approaches that decrease the stress in posterior short implants use an implant designed to increase bone-implant contact surface area, providing the patient with a mutually protected or canine guidance occlusion and splinting implants together with no cantilever load. The survival rate of short implants in the posterior edentulous maxilla is high, and applying short implants under strict clinical protocols seems to be a safe and predictable technique.
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Affiliation(s)
- Zeinab Rezaei Esfahrood
- Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Loghman Ahmadi
- Department of Periodontics, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Elahe Karami
- Department of Periodontics, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Shima Asghari
- International Branch, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Tekin N, Cihan AC, Karaca B, Cokmus C. A Comparative Study: Taxonomic Grouping of Alkaline Protease Producing Bacilli. Pol J Microbiol 2017; 66:39-56. [PMID: 29359694 DOI: 10.5604/17331331.1234992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Alkaline proteases have biotechnological importance due to their activity and stability at alkaline pH. 56 bacteria, capable of growing under alkaline conditions were isolated and their alkaline protease activities were carried out at different parameters to determine their optimum alkaline protease production conditions. Seven isolates were showed higher alkaline protease production capacity than the reference strains. The highest alkaline protease producing isolates (103125 U/g), E114 and C265, were identified as Bacillus licheniformis with 99.4% and Bacillus mojavensis 99.8% based on 16S rRNA gene sequence similarities, respectively. Interestingly, the isolates identified as Bacillus safensis were also found to be high alkaline protease producing strains. Genotypic characterizations of the isolates were also determined by using a wide range of molecular techniques (ARDRA, ITS-PCR, (GTG)5-PCR, BOX-PCR). These different techniques allowed us to differentiate the alkaliphilic isolates and the results were in concurrence with phylogenetic analyses of the 16S rRNA genes. While ITS-PCR provided the highest correlation with 16S rRNA groups, (GTG)5-PCR showed the highest differentiation at species and intra-species level. In this study, each of the biotechnologically valuable alkaline protease producing isolates was grouped into their taxonomic positions with multi-genotypic analyses.
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Affiliation(s)
- Nilgun Tekin
- Biotechnology Institute, Ankara University, Besevler, Ankara, Turkey
| | - Arzu Coleri Cihan
- Faculty of Science, Biology Department, Ankara University, Tandogan, Ankara, Turkey
| | - Basar Karaca
- Faculty of Science, Biology Department, Ankara University, Tandogan, Ankara, Turkey
| | - Cumhur Cokmus
- Konya Food and Agriculture University, Dede Korkut Mahallesi, Beyşehir, Meram, Konya, Turkey
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Goiato MC, de Medeiros RA, Sônego MV, de Lima TMT, Pesqueira AA, dos Santos DM. Stress distribution on short implants with different designs: a photoelastic analysis. J Med Eng Technol 2016; 41:115-121. [DOI: 10.1080/03091902.2016.1239276] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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de Oliveira GJPL, Barros-Filho LAB, Barros LAB, Queiroz TP, Marcantonio E. In Vitro Evaluation of the Primary Stability of Short and Conventional Implants. J ORAL IMPLANTOL 2016; 42:458-463. [PMID: 27455447 DOI: 10.1563/aaid-joi-d-16-00094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this study was to evaluate the primary stability of short and conventional dental implants with different platform types at different site densities in vitro. One hundred twenty implants were placed in polyurethane blocks that simulate different bone densities (bone types I and IV). The implants were divided into 10 groups, with 12 implants each according to the type of prosthetic connections (external hexagon, EH; morse taper, MT) and size of the implants (conventional: 4 × 10 mm; short: 5 × 5, 5.5 × 5, 5 × 6, and 5.5 × 6 mm). Insertion torque and resonance frequency analyses were performed to evaluate the primary stability. The Kruskal-Wallis test complemented by Dunn's test and the Mann-Whitney test were used for statistical analysis. These tests were applied at the confidence level of 95% (P < .05). The implants installed in blocks with density type IV exhibited reduced insertion torque compared with implants placed in blocks with density type I. Short implants with EH exhibited increased insertion torque compared with short implants with MT in blocks with bone density type I. In general, implants installed in blocks with density type I exhibited greater primary stability. The short implants with EH with a 5.5-mm diameter and the short implants with MT with a 5-mm diameter exhibited reduced primary stability. No differences between short and conventional implants were noted. Short implants have primary stability and insertion torque at least equivalent to conventional implants irrespective of the platform type and density of the site.
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Affiliation(s)
| | - Luiz Antônio Borelli Barros-Filho
- 1 Section of Periodontology, Department of Diagnosis and Surgery, School of Dentistry at Araraquara-Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Luiz Antônio Borelli Barros
- 2 Section of Clinics, Department of Oral Social Health, School of Dentistry at Araraquara- Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Thalita Pereira Queiroz
- 3 Department of Health Sciences, Dental School, University Center of Araraquara-Araraquara, São Paulo, Brazil
| | - Elcio Marcantonio
- 1 Section of Periodontology, Department of Diagnosis and Surgery, School of Dentistry at Araraquara-Universidade Estadual Paulista, Araraquara, SP, Brazil
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Al-Hashedi AA, Taiyeb-Ali TB, Yunus N. Outcomes of placing short implants in the posterior mandible: a preliminary randomized controlled trial. Aust Dent J 2016; 61:208-18. [DOI: 10.1111/adj.12337] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/02/2015] [Indexed: 11/27/2022]
Affiliation(s)
- AA Al-Hashedi
- Department of Prosthodontic Dentistry; Sana'a University; Sana'a Yemen
- Department of Oral Biology and Biomedical Sciences; Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
| | - TB Taiyeb-Ali
- Department of Oral Biology and Biomedical Sciences; Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
| | - N Yunus
- Department of Restorative Dentistry; Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
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Sierra-Sánchez JL, García-Sala-Bonmatí F, Martínez-González A, García-Dalmau C, Mañes-Ferrer JF, Brotons-Oliver A. Predictability of short implants ( < 10 mm) as a treatment option for the rehabilitation of atrophic maxillae. A systematic review. Med Oral Patol Oral Cir Bucal 2016; 21:e392-402. [PMID: 26946199 PMCID: PMC4867215 DOI: 10.4317/medoral.20949] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 11/20/2015] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Short implants (< 10 mm) are one of the treatment options available in cases of limited vertical bone. Although such implants are now widely used, there is controversy regarding their clinical reliability. The purpose of this paper is to evaluate the predictability of short implants as an alternative to technically more complex treatments in patients with atrophic maxillae, based on a systematic review of the literature and the analysis of the implant survival rates, changes in peri-implant bone level, and associated complications. It is postulated that short implants offer clinical results similar to those of longer implants. MATERIAL AND METHODS A Medline-PubMed search was made covering the period between January 2004 and December 2014 (both included). Studies in English published in indexed journals, involving at least 20 implants and with a follow-up period of at least 12 months were considered. A manual search in four high impact journals was also conducted. RESULTS A total of 37 studies meeting the inclusion criteria were included in this review. 9792 implants placed in over 5000 patients were analyzed. CONCLUSIONS Based on the results of this review, short implants are seen to offer clinical results in terms of survival, bone loss and complications similar to those of longer implants.
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Affiliation(s)
- J-L Sierra-Sánchez
- Clínica Universitaria Odontológica, Universidad Europea de Valencia, C/ Alfambra, 4- bajo, 46009- Valencia, Spain,
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Mariani E, Canella V, Berlingeri A, Bielli A, Cattini L, Landini MP, Kon E, Marcacci M, Di Matteo B, Filardo G. Leukocyte presence does not increase microbicidal activity of Platelet-rich Plasma in vitro. BMC Microbiol 2015. [PMID: 26223356 PMCID: PMC4520275 DOI: 10.1186/s12866-015-0482-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background Human platelets are a rich reservoir of molecules that promote regenerative processes and microbicidal activity. This activity might be increased by concentration in platelet-rich plasma (PRP) products and modulated by the presence of leukocytes. Despite extensive use in clinical procedures, only few studies have investigated PRP’s real microbicidal potential. Therefore, this study aimed at comparing the in vitro microbicidal activity of platelets and leukocyte-enriched PRP (L-PRP) to pure platelet-rich plasma (P-PRP) and the contribution of leukocytes to microbicidal properties. Antimicrobial effects of P- and L-PRP were tested against Escherichia Coli, Staphylococcus Aureus, Klebsiella Pneumoniae, Pseudomonas Aeruginosa and Enterococcus Faecalis. Furthermore, L-PRP was frozen (L-PRP cryo) to assess whether the preparation maintained in vitro characteristics. Microbicidal proteins released by the three preparations were also evaluated. Results L-PRP, L-PRP cryo and P-PRP generally induced comparable bacterial growth inhibition for up to 4 h’ incubation, range 1–4 log. MIP-1α, RANTES, GRO-α, IL-8, NAP-2, SDF-1α and IL-6 showed strong microbicidal potential. Conclusions We found in vitro antibacterial activity of L-PRP and P-PRP and the possibility to cryopreserve L-PRP, without important changes to its effectiveness; similar microbicidal activity between preparations containing or not leukocytes; and the contribution of three new molecules (NAP-2, SDF-1α and IL-6).
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Affiliation(s)
- Erminia Mariani
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136, Bologna, Italy. .,Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.
| | - Valentina Canella
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Andrea Berlingeri
- Unit of Clinical Microbiology, St. Orsola University Hospital, University of Bologna, Bologna, Italy.
| | - Alessandra Bielli
- Unit of Clinical Microbiology, St. Orsola University Hospital, University of Bologna, Bologna, Italy.
| | - Luca Cattini
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Via di Barbiano 1/10, 40136, Bologna, Italy.
| | - Maria Paola Landini
- Unit of Clinical Microbiology, St. Orsola University Hospital, University of Bologna, Bologna, Italy.
| | - Elizaveta Kon
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, Bologna, Italy.
| | - Maurilio Marcacci
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, Bologna, Italy.
| | - Berardo Di Matteo
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, Bologna, Italy.
| | - Giuseppe Filardo
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, Bologna, Italy.
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Alvira-González J, Díaz-Campos E, Sánchez-Garcés MA, Gay-Escoda C. Survival of immediately versus delayed loaded short implants: A prospective case series study. Med Oral Patol Oral Cir Bucal 2015; 20:e480-8. [PMID: 26034926 PMCID: PMC4523261 DOI: 10.4317/medoral.20407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 03/05/2015] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND To assess and compare survival rates of immediately and delayed loaded short implants (7 mm) in free ends of a partially edentulous jaw with moderate-severe alveolar bone resorption. MATERIAL AND METHODS 24 patients with atrophic edentulous free-ends were included in this prospective study. Four study groups were monitored monthly and their behavior was evaluated: bridges supported only by short implants and mixed short and long implant bridge groups, both with immediate and delayed loading. Failures, bone loss, probing depth and bleeding on probing were evaluated. RESULTS 54 Mk III Shorty TiU and 15 Brånemark System®MK III TiU implants with a length longer than 7mm were included in the study. Twenty-eight implants were inserted following the immediate loading protocol and 26 according a two-stage procedure, depending on the torque value. The cumulative survival rate of short implants was 87% (n=54) after a mean time of 47.72 months (range 33-62 months), showing statistically significant differences related to loading protocol (p=0.047). Short implants immediately loaded had a higher long-term survival rate (96.4%) compared to the other study group (76.9%). Besides, short implants splinted to longer immediately loaded implants presented the highest survival rate (100%). Twenty-five (53.19%) short implants showed a bone loss of less than one millimeter after the follow-up period. Statistically significant differences were found between bleeding on probing, presence of plaque or suppuration and a higher bone loss in both loading protocols (p=0.001). CONCLUSIONS Immediate loading of short implants placed on free ends can be considered an option in the treatment protocol of patients with severe bone resorption especially if implants are splinted to others of greater length.
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Mariani E, Filardo G, Canella V, Berlingeri A, Bielli A, Cattini L, Landini MP, Kon E, Marcacci M, Facchini A. Platelet-rich plasma affects bacterial growth in vitro. Cytotherapy 2015; 16:1294-304. [PMID: 25108654 DOI: 10.1016/j.jcyt.2014.06.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 05/30/2014] [Accepted: 06/17/2014] [Indexed: 11/25/2022]
Abstract
BACKGROUND AIMS Platelet-rich plasma (PRP), a blood derivative rich in platelets, is a relatively new technique used in tissue regeneration and engineering. The increased quantity of platelets makes this formulation of considerable value for their role in tissue healing and microbicidal activity. This activity was investigated against five of the most important strains involved in nosocomial infections (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae and Streptococcus faecalis) to understand the prophylactic role of pure (P)-PRP. Microbicidal proteins released from activated P-PRP platelets were also determined. METHODS The microbicidal activity of P-PRP and platelet-poor plasma (PPP) was evaluated on different concentrations of the five bacterial strains incubated for 1, 2, 4 and 18 h and plated on agar for 18-24 h. P-PRP and PPP-released microbicidal proteins were evaluated by means of multiplex bead-based immunoassays. RESULTS P-PRP and PPP inhibited bacterial growth for up to 2 h of incubation. The effect of P-PRP was significantly higher than that of PPP, mainly at the low seeding concentrations and/or shorter incubation times, depending on the bacterial strain. Chemokine (C-C motif) ligand-3, chemokine (C-C motif) ligand-5 and chemokine (C-X-C motif) ligand-1 were the molecules mostly related to Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus faecalis inhibition. Escherichia coli and Klebsiella pneumoniae were less influenced. CONCLUSIONS The present results show that P-PRP might supply an early protection against bacterial contaminations during surgical interventions because the inhibitory activity is already evident from the first hour of treatment, which suggests that physiological molecules supplied in loco might be important in the time frame needed for the activation of the innate immune response.
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Affiliation(s)
- Erminia Mariani
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Bologna, Italy; Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy.
| | - Giuseppe Filardo
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Valentina Canella
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Andrea Berlingeri
- Operative Unit of Clinical Microbiology, St. Orsola-Malpighi University Hospital, Regional Reference Centre for Microbiological Emergencies, Bologna, Italy
| | - Alessandra Bielli
- Operative Unit of Clinical Microbiology, St. Orsola-Malpighi University Hospital, Regional Reference Centre for Microbiological Emergencies, Bologna, Italy
| | - Luca Cattini
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Maria Paola Landini
- Operative Unit of Clinical Microbiology, St. Orsola-Malpighi University Hospital, Regional Reference Centre for Microbiological Emergencies, Bologna, Italy
| | - Elizaveta Kon
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Maurilio Marcacci
- Laboratory of Biomechanics and Technology Innovation/NABI, 2nd Orthopaedic and Traumatologic Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy
| | - Andrea Facchini
- Laboratory of Immunorheumatology and Tissue Regeneration/RAMSES, Rizzoli Orthopaedic Institute, Bologna, Italy; Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
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Maló P, de Araújo Nobre MA, Lopes AV, Rodrigues R. Immediate loading short implants inserted on low bone quantity for the rehabilitation of the edentulous maxilla using an All-on-4 design. J Oral Rehabil 2015; 42:615-23. [PMID: 25757870 DOI: 10.1111/joor.12291] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2015] [Indexed: 11/30/2022]
Abstract
More studies evaluating the outcome of short-length dental implants in immediate loading are needed. To evaluate the use of short-length tapered implants in immediate loading for complete edentulous maxillae rehabilitations using an All-on-4 design. This retrospective clinical study included a cohort of 43 patients with 172 implants (74 short-length implants) inserted in low bone quantity. The patients were followed between 4 months and 6 years (average = 3 years). Outcome measures were implant survival, marginal bone remodelling, biological and mechanical complications. Two patients with four short-length implants were lost to follow-up during the first year. Three short and three long implants failed in four patients, rendering an overall cumulative survival rate implant and patient level, respectively, of 95.7% and 95.1% for short implants, 100% for regular implants and 96.6% and 95.2% for long implants. The average marginal bone remodelling at 1 and 3 years was 0.97 and 1.25 mm for the short implants, 0.82 and 0.87 mm for regular implants and 0.87 and 0.98 mm for long implants. Three patients presented 4 short-length implants with peri-implant pockets (3 implants in 2 patients were pseudo-pockets). Mechanical complications were registered in 13 patients (7 provisional prostheses fractures and 6 abutment screw loosening). All complications were treated successfully. Within the limitations of this clinical study, the short-term outcome of fixed prosthetic complete edentulous maxillae rehabilitations supported by short-length implants inserted in low bone quantity areas is viable. Long-term clinical studies are necessary for evaluating the outcome of these implants.
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Affiliation(s)
- P Maló
- Oral Surgery Department, Maló Clinic, Lisbon, Portugal
| | | | - A V Lopes
- Research and Development Department, Maló Clinic, Lisbon, Portugal
| | - R Rodrigues
- Prosthodontics Department, Maló Clinic, Lisbon, Portugal
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Pabst AM, Walter C, Ehbauer S, Zwiener I, Ziebart T, Al-Nawas B, Klein MO. Analysis of implant-failure predictors in the posterior maxilla: a retrospective study of 1395 implants. J Craniomaxillofac Surg 2015; 43:414-20. [PMID: 25697051 DOI: 10.1016/j.jcms.2015.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 01/10/2015] [Accepted: 01/13/2015] [Indexed: 10/24/2022] Open
Abstract
The aim of this study was to analyze predictors for dental implant failure in the posterior maxilla. A database was created to include patients being treated with dental implants posterior to the maxillary cuspids. Independent variables thought to be predictive of potential implant failure included (1) sinus elevation, (2) implant length, (3) implant diameter, (4) indication, (5) implant region, (6) timepoint of implant placement, (7) one-vs. two-stage augmentation, and (8) healing mode. Cox regression analysis was used to evaluate the influence of predictors 1-3 on implant failure as dependent variable. The predictors 4-9 were analyzed strictly descriptively. The final database included 592 patients with 1395 implants. The overall 1- and 5-year implant survival rates were 94.8% and 88.6%, respectively. The survival rates for sinus elevation vs. placement into native bone were 94.4% and 95.4%, respectively (p = 0.33). The survival rates for the short (<10 mm), the middle (10-13 mm) and the long implants (>13 mm) were 100%, 89% and 76.8%, respectively (middle-vs. long implants p = 0.62). The implant survival rates for the small- (<3.6 mm), the middle- (3.6-4.5 mm) and the wide diameter implants (>4.5 mm) were 92.5%, 87.9% and 89.6%, respectively (p = 0.0425). None of the parameters evaluated were identified as predictor of implant failure in the posterior maxilla.
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Affiliation(s)
- Andreas Max Pabst
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany.
| | - Christian Walter
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Sebastian Ehbauer
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Isabella Zwiener
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center Mainz, Obere Zahlbacher Strasse 69, 55131 Mainz, Germany
| | - Thomas Ziebart
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Marcus Oliver Klein
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany; Private Practice, Oral and Maxillofacial Surgery, Stresemannstrasse 7-9, 40210 Düsseldorf, Germany
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Monteiro DR, Silva EVF, Pellizzer EP, Filho OM, Goiato MC. Posterior partially edentulous jaws, planning a rehabilitation with dental implants. World J Clin Cases 2015; 3:65-76. [PMID: 25610852 PMCID: PMC4295221 DOI: 10.12998/wjcc.v3.i1.65] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/22/2014] [Accepted: 12/10/2014] [Indexed: 02/05/2023] Open
Abstract
AIM: To discuss important characteristics of the use of dental implants in posterior quadrants and the rehabilitation planning.
METHODS: An electronic search of English articles was conducted on MEDLINE (PubMed) from 1990 up to the period of March 2014. The key terms were dental implants and posterior jaws, dental implants/treatment planning and posterior maxilla, and dental implants/treatment planning and posterior mandible. No exclusion criteria were used for the initial search. Clinical trials, randomized and non randomized studies, classical and comparative studies, multicenter studies, in vitro and in vivo studies, case reports, longitudinal studies and reviews of the literature were included in this review.
RESULTS: One hundred and fifty-two articles met the inclusion criteria of treatment planning of dental implants in posterior jaw and were read in their entirety. The selected articles were categorized with respect to their context on space for restoration, anatomic considerations (bone quantity and density), radiographic techniques, implant selection (number, position, diameter and surface), tilted and pterygoid implants, short implants, occlusal considerations, and success rates of implants placed in the posterior region. The results derived from the review process were described under several different topic headings to give readers a clear overview of the literature. In general, it was observed that the use of dental implants in posterior region requires a careful treatment plan. It is important that the practitioner has knowledge about the theme to evaluate the treatment parameters.
CONCLUSION: The use of implants to restore the posterior arch presents many challenges and requires a detailed treatment planning.
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Nisand D, Renouard F. Short implant in limited bone volume. Periodontol 2000 2014; 66:72-96. [DOI: 10.1111/prd.12053] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2013] [Indexed: 12/28/2022]
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Cavallo C, Filardo G, Mariani E, Kon E, Marcacci M, Pereira Ruiz MT, Facchini A, Grigolo B. Comparison of platelet-rich plasma formulations for cartilage healing: an in vitro study. J Bone Joint Surg Am 2014; 96:423-9. [PMID: 24599205 DOI: 10.2106/jbjs.m.00726] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Platelet-rich plasma (PRP) has been advocated as one treatment for cartilage tissue regeneration. To date, several different platelet-rich formulations have been available, but a deep knowledge of their composition and mechanism of action in a specific clinical use is needed. The aim of this study was to investigate the effect of various PRP formulations on human chondrocytes in vitro. METHODS Blood from ten human volunteers was used to prepare three formulations: (1) PRP with a relatively low concentration of platelets and very few leukocytes (P-PRP), (2) PRP with high concentrations of both platelets and leukocytes (L-PRP), and (3) platelet-poor plasma (PPP). Selected growth factors in the formulations were measured, and the in vitro effects of various concentrations were tested by exposing chondrocytes isolated from osteoarthritic cartilage of four different men and measuring cell proliferation, matrix production, and gene expression. RESULTS L-PRP contained the highest levels of growth factors and cytokines. All three formulations stimulated chondrocyte proliferation throughout the culture period evaluated; the only significant difference among the formulations was on day 7, when P-PRP induced greater cell growth compared with the other two formulations. P-PRP stimulated chondrocyte anabolism, as shown by the expression of type-II collagen and aggrecan, whereas L-PRP promoted catabolic pathways involving various cytokines. However, L-PRP induced greater expression of the hyaluronic acid synthase-2 gene and greater production of hyaluronan compared with P-PRP. CONCLUSIONS L-PRP and P-PRP induced distinct effects on human articular chondrocytes in vitro, possibly because of differences in the concentrations of platelets, leukocytes, growth factors, and other bioactive molecules. The identification of the optimal amounts and ratios of these blood components could ideally lead to a formulation more suitable for the treatment of cartilage lesions.
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Affiliation(s)
- Carola Cavallo
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | - Giuseppe Filardo
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | - Erminia Mariani
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | - Elizaveta Kon
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | - Maurilio Marcacci
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | | | - Andrea Facchini
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
| | - Brunella Grigolo
- SSD RAMSES Laboratory (C.C. and B.G.), Immunorheumatology and Tissue Regeneration Laboratory (E.M. and A.F.), SC Biomechanics and Technology Laboratory (G.F.), SC Orthopedic and Traumatology Clinic (M.M.), and Nano-Biotechnology Laboratory (E.K.), Rizzoli
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Perut F, Filardo G, Mariani E, Cenacchi A, Pratelli L, Devescovi V, Kon E, Marcacci M, Facchini A, Baldini N, Granchi D. Preparation method and growth factor content of platelet concentrate influence the osteogenic differentiation of bone marrow stromal cells. Cytotherapy 2013; 15:830-9. [PMID: 23731763 DOI: 10.1016/j.jcyt.2013.01.220] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 12/06/2012] [Accepted: 01/29/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND AIMS An extensive debate about the clinical benefits of autologous platelet concentrates used as a treatment option for patients with orthopedic injuries is ongoing. The aim of this study was to determine whether different compositions of platelet concentrates may affect the osteogenic differentiation of bone marrow stromal cells (BMSC). METHODS Pure platelet-rich plasma (P-PRP) and leukocyte-PRP (L-PRP) were characterized for platelet and leukocyte content. As an indicative marker of the delivery of growth factors (GFs), the release of basic fibroblast growth factor (bFGF) from platelet gel (PG) was measured at 1, 18, 48 and 72 h and at 7 d. The ability of different PGs to induce proliferation and differentiation of BMSC was evaluated by using bioactivity assays. RESULTS The platelet recovery was significantly higher in L-PRP, either fresh or frozen. PGs derived from L-PRP and P-PRP showed significant differences in terms of bFGF release and biological activity. bFGF release was faster both in fresh and frozen L-PRP preparations. Moreover, L-PRP samples were able to induce a significantly higher proliferation of BMSC compared with P-PRP or PPP samples. Even though all PG preparations allowed the deposition of mineral nodules in BMSC cultures, the mineralization activity correlated significantly with bFGF levels. CONCLUSIONS The biological activity of platelet concentrates differs according to preparation technique, which affects platelet and leukocyte content and GF availability. Because GF levels are not always optimal in subjects with defective bone healing, composition and bioactivity of PRP should be analyzed to test the reliability and potential effectiveness of the regenerative treatment.
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Affiliation(s)
- Francesca Perut
- Laboratory for Orthopaedic Pathophysiology and Regenerative Medicine, Rizzoli Orthopedic Institute, Bologna, Italy.
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Jung RE, Zembic A, Pjetursson BE, Zwahlen M, Thoma DS. Systematic review of the survival rate and the incidence of biological, technical, and aesthetic complications of single crowns on implants reported in longitudinal studies with a mean follow-up of 5 years. Clin Oral Implants Res 2013; 23 Suppl 6:2-21. [PMID: 23062124 DOI: 10.1111/j.1600-0501.2012.02547.x] [Citation(s) in RCA: 567] [Impact Index Per Article: 51.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To assess the 5-year survival of implant-supported single crowns (SCs) and to describe the incidence of biological, technical, and aesthetic complications. The focused question was: What is the survival rate of implants supporting single crowns and implant-supported crowns with a mean follow-up of 5 years and to which extent do biological, technical, and aesthetic complications occur? METHODS A Medline search (2006-2011) was performed for clinical studies focusing on implant-supported SCs with a mean follow-up of at least 5 years. The search was complemented by an additional hand search and the inclusion of 24 studies from a previous systematic review (Jung et al. 2008a). Survival and complication rates were analyzed using random-effects Poisson's regression models to obtain summary estimates of 5- and 10-year proportions. RESULTS Forty-six studies derived from an initial search count of 1083 titles and the complementary publications from the previous systematic review (Jung et al. 2008a) were selected and the data were extracted. Based on the meta-analysis, survival of implants supporting SCs at 5 years amounted to 97.2% (95% CI: 96.3-97.9%), and at 10 years amounted to 95.2% (95% CI: 91.8-97.2%). The survival of implant-supported SCs was 96.3% (95% CI: 94.2-97.6%) after 5 years and 89.4% (95% CI: 82.8-93.6%) after 10 years. For biological complications, a 5-year cumulative soft tissue complication rate of 7.1% (95% CI: 4.4-11.3%) and a cumulative complication rate for implants with bone loss >2 mm of 5.2% (95% CI: 3.1-8.6%) were calculated. Technical complications reached a cumulative incidence of 8.8% (95% CI: 5.1-15.0%) for screw-loosening, 4.1% (95% CI: 2.2-7.5%) for loss of retention, and 3.5% (95% CI: 2.4-5.2%) for fracture of the veneering material after 5 years. The cumulative 5-year aesthetic complication rate amounted to 7.1% (95% CI: 3.6-13.6%). CONCLUSIONS The outcomes of the meta-analysis demonstrated high implant survival rates for both the single tooth implants and the respective single crowns after 5 and 10 years. However, technical, biological, and aesthetic complications were frequent.
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Affiliation(s)
- Ronald E Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland.
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30
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Monje A, Fu JH, Chan HL, Suarez F, Galindo-Moreno P, Catena A, Wang HL. Do Implant Length and Width Matter for Short Dental Implants (<10 mm)? A Meta-Analysis of Prospective Studies. J Periodontol 2013; 84:1783-91. [DOI: 10.1902/jop.2013.120745] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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De Santis D, Cucchi A, Rigoni G, Longhi C. Short Implants with Oxidized Surface in Posterior Areas of Atrophic Jaws: 3- to 5-Year Results of a Multicenter Study. Clin Implant Dent Relat Res 2013; 17:442-52. [DOI: 10.1111/cid.12123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniele De Santis
- Department of Surgery; Section of Dentistry and Maxillofacial Surgery; University of Verona; Verona Italy
| | - Alessandro Cucchi
- Department of Biomedical and Neuromotorial Science; University of Bologna; Bologna Italy
| | - Giovanni Rigoni
- Department of Oral Surgery and Dentistry; University of Milan; Milan Italy
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Almeida EO, Rocha EP, Freitas Júnior AC, Anchieta RB, Poveda R, Gupta N, Coelho PG. Tilted and short implants supporting fixed prosthesis in an atrophic maxilla: a 3D-FEA biomechanical evaluation. Clin Implant Dent Relat Res 2013; 17 Suppl 1:e332-42. [PMID: 23910435 DOI: 10.1111/cid.12129] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE This study compared the biomechanical behavior of tilted long implant and vertical short implants to support fixed prosthesis in an atrophic maxilla. MATERIALS AND METHODS The maxilla model was built based on a tomographic image of the patient. Implant models were based on micro-computer tomography imaging of implants. The different configurations considered were M4S, four vertical anterior implants; M4T, two mesial vertical implants and two distal tilted (45°) implants in the anterior region of the maxilla; and M6S, four vertical anterior implants and two vertical posterior implants. Numerical simulation was carried out under bilateral 150 N loads applied in the cantilever region in axial (L1) and oblique (45°) (L2) direction. Bone was analyzed using the maximum and minimum principal stress (σmax and σmin ), and von Mises stress (σvM ) assessments. Implants were analyzed using the σvM . RESULTS The higher σmax was observed at: M4T, followed by M6S/L1, M6S/L2, M4S/L2, and M4S/L1 and the higher σvM : M4T/L1, M4T/L2 and M4S/L2, M6S/L2, M4S/L1, and M6S/L1. CONCLUSIONS The presence of distal tilted (all-on-four) and distal short implants (all-on-six) resulted in higher stresses in both situations in the maxillary bone in comparison to the presence of vertical implants (all-on-four).
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Affiliation(s)
- Erika O Almeida
- Department of Dentistry, Federal University of Rio Grande do Norte, Natal, RN, Brazil
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Anitua E, Piñas L, Orive G. Retrospective Study of Short and Extra-Short Implants Placed in Posterior Regions: Influence of Crown-to-Implant Ratio on Marginal Bone Loss. Clin Implant Dent Relat Res 2013; 17:102-10. [DOI: 10.1111/cid.12073] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Eduardo Anitua
- Implantology and Oral Rehabilitation; Vitoria Spain
- Biotechnology Institute (BTI); Vitoria Spain
| | - Laura Piñas
- Implantology and Oral Rehabilitation; Vitoria Spain
| | - Gorka Orive
- Biotechnology Institute (BTI); Vitoria Spain
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Malchiodi L, Cucchi A, Ghensi P, Consonni D, Nocini PF. Influence of crown-implant ratio on implant success rates and crestal bone levels: a 36-month follow-up prospective study. Clin Oral Implants Res 2013; 25:240-51. [DOI: 10.1111/clr.12105] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2012] [Indexed: 11/30/2022]
Affiliation(s)
| | - Alessandro Cucchi
- Department of Biomedical and Neuromotorial Science; University of Bologna; Bologna Italy
| | - Paolo Ghensi
- Department of Oral and Maxillofacial Surgery; University of Milan; Milan Italy
| | - Dario Consonni
- Epidemiology Unit, IRCCS Fundation Ca' Granda Ospedale Maggiore Policlinico; Milan Italy
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Kuramochi G, Fuentes P, Rosemberg R, Díaz V, Palacios L. Tasa de supervivencia de implantes cortos y largos en población chilena. JOURNAL OF ORAL RESEARCH 2012. [DOI: 10.17126/joralres.2012.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ji TJ, Kan JYK, Rungcharassaeng K, Roe P, Lozada JL. Immediate Loading of Maxillary and Mandibular Implant-Supported Fixed Complete Dentures: A 1- to 10-Year Retrospective Study. J ORAL IMPLANTOL 2012; 38 Spec No:469-76. [DOI: 10.1563/aaid-joi-d-11-00027] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study evaluated the success rates of 50 full-arch maxillary and/or mandibular implant-supported fixed complete dentures. After a mean follow-up time of 42.1 months, 269 implants remained in function, which corresponded to cumulative implant success rates of 85.2% and an absolute success rate of 90.6% (269/297 implants). This study suggested that higher implant failure rates might be associated with a dental history of bruxism (29.3%) vs no history of bruxism (4.6%) and surgeons with limited experience (≤5 years; 12.2%) vs surgeons with experience (2.4%).
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Affiliation(s)
- Ting-Jen Ji
- 1 Advanced Education in Implant Dentistry, Loma Linda University School of Dentistry
| | - Joseph Y. K. Kan
- 2 Department of Restorative Dentistry, Loma Linda University School of Dentistry
| | - Kitichai Rungcharassaeng
- 3 Department of Orthodontics and Dentofacial Orthopedics, Loma Linda University School of Dentistry
| | - Phillip Roe
- 2 Department of Restorative Dentistry, Loma Linda University School of Dentistry
| | - Jaime L. Lozada
- 1 Advanced Education in Implant Dentistry, Loma Linda University School of Dentistry
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Short implants in partially edentuolous maxillae and mandibles: a 10 to 20 years retrospective evaluation. Int J Dent 2012; 2012:351793. [PMID: 22829823 PMCID: PMC3399378 DOI: 10.1155/2012/351793] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 05/06/2012] [Indexed: 11/18/2022] Open
Abstract
Purpose. Evaluation of the short implant (8 mm in height) long-term prognosis and of the implant site influence on the prognosis. Methods. A longitudinal study was carried out on 121 patients (57 males and 64 females) consecutively treated with 257 implants. 108 implants were short. Results. Four (3.6%) short implants supporting fixed partial prostheses failed. Similarly, three standard implants supporting fixed partial prostheses and one supporting single-crown prosthesis failed. Mean marginal bone loss (MBL) and probing depth (PD) of short and standard implants were statistically comparable (P > .05). The 20-year cumulative survival rates of short and standard implants were 92.3 and 95.9%, respectively. The cumulative success rates were 78.3 and 81.4%. The survival rates of short implants in posterior and anterior regions were comparable: 95 and 96.4%, respectively. The difference between survival rates was not significant (P > .05). Conclusions. The high reliability of short implants in supporting fixed prostheses was confirmed. Short and standard implants long-term prognoses were not significantly different. The prognosis of short implants in posterior regions was comparable to that of in anterior regions. Nevertheless, a larger sample is required to confirm this trend.
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Lai HC, Si MS, Zhuang LF, Shen H, Liu YL, Wismeijer D. Long-term outcomes of short dental implants supporting single crowns in posterior region: a clinical retrospective study of 5-10 years. Clin Oral Implants Res 2012; 24:230-7. [DOI: 10.1111/j.1600-0501.2012.02452.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2012] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Chang Lai
- Department of Oral and Maxillo-facial Implantology; Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University; Shanghai; China
| | - Mi-Si Si
- Department of Oral and Maxillo-facial Implantology; Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University; Shanghai; China
| | - Long-Fei Zhuang
- Faculty of Dentistry; the University of Hong Kong; Hong Kong; China
| | - Hui Shen
- Arrail Dental Clinic; Shanghai; China
| | - Yue-lian Liu
- Oral Function and Restorative Dentistry; Section Oral Implantology and Prosthetic Dentistry; LA Amsterdam; The Netherlands
| | - Daniel Wismeijer
- Oral Function and Restorative Dentistry; Section Oral Implantology and Prosthetic Dentistry; LA Amsterdam; The Netherlands
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Anitua E, Orive G. A new approach for atraumatic implant explantation and immediate implant installation. Oral Surg Oral Med Oral Pathol Oral Radiol 2012; 113:e19-25. [DOI: 10.1016/j.tripleo.2011.06.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 06/20/2011] [Accepted: 06/27/2011] [Indexed: 11/16/2022]
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40
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Del Fabbro M, Corbella S, Weinstein T, Ceresoli V, Taschieri S. Implant Survival Rates after Osteotome-Mediated Maxillary Sinus Augmentation: A Systematic Review. Clin Implant Dent Relat Res 2011; 14 Suppl 1:e159-68. [DOI: 10.1111/j.1708-8208.2011.00399.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Anitua E, Alkhraisat MH, Orive G. Perspectives and challenges in regenerative medicine using plasma rich in growth factors. J Control Release 2011; 157:29-38. [PMID: 21763737 DOI: 10.1016/j.jconrel.2011.07.004] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 06/06/2011] [Indexed: 12/18/2022]
Abstract
Plasma rich in growth factors (PRGF-Endoret) is an endogenous therapeutic technology that is gaining interest in regenerative medicine due to its potential to stimulate and accelerate tissue healing and bone regeneration. This autologous biotechnology is designed for the in situ delivery of multiple cellular modulators and the formation of a fibrin scaffold, thereby providing different formulations that can be widely used in numerous medical and scientific fields including dentistry, oral implantology, orthopedics, ulcer treatment and tissue engineering among others. Here we discuss the important progress that has been accomplished in this field. Furthermore, a comprehensive outlook of the intriguing therapeutic applications of this technology is presented.
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Affiliation(s)
- Eduardo Anitua
- Private Practice in Implantology and Oral Rehabilitation in Vitoria, Spain
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42
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Chiapasco M, Zaniboni M. Failures in Jaw Reconstructive Surgery with Autogenous Onlay Bone Grafts for Pre-implant Purposes: Incidence, Prevention and Management of Complications. Oral Maxillofac Surg Clin North Am 2011; 23:1-15, v. [DOI: 10.1016/j.coms.2010.10.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Birdi H, Schulte J, Kovacs A, Weed M, Chuang SK. Crown-to-Implant Ratios of Short-Length Implants. J ORAL IMPLANTOL 2010; 36:425-33. [DOI: 10.1563/aaid-joi-d-09-00071] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
Excessive crown-implant ratios have been cited in the literature as being detrimental to long-term implant survival. However, unfavorable crown-implant ratios have not yet been established. The primary aim of this study was to determine the crown-implant ratios of single-tooth implant-supported restorations on short-length implants in a clinical practice, and to evaluate the health of these implants via mesial and distal first bone-to-implant contact levels. Additionally, the relationship between crown-implant ratios and proximal first bone-to-implant contact levels will be evaluated. In this retrospective cohort study, the cohort was composed of 194 patients who possessed at least 1 single 5.7 mm or 6 mm length plateau design implant-supported restoration that had been surgically placed between February 1997 and December 2005. A chart review was performed to acquire the most recent radiographs in which both the entire crown and the implant were visible. The length of the crown and implant was measured directly from the radiographs using consistent magnification to calculate the crown-implant ratio. Mesial and distal first bone-to-implant contact levels were measured using 3 times magnification and were mathematically corrected for distortion. The last available radiograph was used to measure bone levels. Follow-up time was calculated from the day of implant placement to the date of the last available radiograph. Statistical analyses with analysis of variance mixed models were used. Data from 309 single implant-supported fixed restorations were tabulated and included in the study. The mean (SD) follow-up time was 20.9 (23.2) months, with a range of 15.6 to 122.8 months. The mean crown length (SD) was 13.4 (2.6) mm, with a range of 6.2 to 21.7 mm. The mean (SD) crown-implant ratio was 2.0 (0.4) and ranged from 0.9 to 3.2. The average mesial and distal first bone-to-implant contact levels (SD) measured from the radiographs were −0.2 (0.7) mm and −0.2 (0.9) mm, respectively. No statistically significant relationship was observed between increasing crown-implant ratios and decreasing mesial and distal first bone-to-implant contact levels around the implant with P values of .94 and .57, respectively. In this investigation, mesial and distal first bone-to-implant contact levels on short-length implants fall within the established guidelines for success. Also, there are no associations between crown-implant ratios and first bone-to-implant contact levels.
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Affiliation(s)
- Hardeep Birdi
- University of Minnesota School of Dentistry, Minneapolis, Minn
| | - John Schulte
- University of Minnesota School of Dentistry, Minneapolis, Minn
| | | | | | - Sung-Kiang Chuang
- Department of OMFS, Massachusetts General Hospital and the Harvard School of Dental Medicine, Boston, Mass
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44
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Sánchez-Garcés MA, Costa-Berenguer X, Gay-Escoda C. Short Implants: A Descriptive Study of 273 Implants. Clin Implant Dent Relat Res 2010; 14:508-16. [DOI: 10.1111/j.1708-8208.2010.00301.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Neldam CA, Pinholt EM. State of the Art of Short Dental Implants: A Systematic Review of the Literature. Clin Implant Dent Relat Res 2010; 14:622-32. [DOI: 10.1111/j.1708-8208.2010.00303.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Treatment of Patient With Papillon-Lefevre Syndrome With Short Dental Implants: A Case Report. IMPLANT DENT 2010; 19:394-9. [DOI: 10.1097/id.0b013e3181ed0798] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Chiapasco M, Romeo E, Coggiola A, Brusati R. Long-term outcome of dental implants placed in revascularized fibula free flaps used for the reconstruction of maxillo-mandibular defects due to extreme atrophy. Clin Oral Implants Res 2010; 22:83-91. [PMID: 20868451 DOI: 10.1111/j.1600-0501.2010.01999.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE the objectives of this study were to evaluate (a) the clinical outcome of revascularized fibula flaps used for the reconstruction of extremely atrophic jaws and (b) the survival rates of dental implants placed in the reconstructed areas. MATERIALS AND METHODS between 1999 and 2004, 12 patients presenting with extreme atrophy of the edentulous jaws were reconstructed with fibula free flaps. Five to 12 months after the reconstructive procedure, 75 titanium dental implants were placed in the reconstructed areas, while prosthetic rehabilitation was started 4-6 months afterward. The mean follow-up of patients after the start of prosthetic loading was 77 months (range: 48-116). RESULTS an uneventful healing of the bone transplants occurred in all patients. One out of the 75 dental implants placed was not loaded due to prosthetic reasons. No dental implants failed to integrate before prosthetic loading, while three were removed during the follow-up period. Despite the high survival rate of dental implants (95.8%), a relevant number of them presented relevant peri-implant bone-level loss, ranging from 1 to 7 mm for maxillary dental implants and from 1 to 4.5 mm for mandibular dental implants. CONCLUSION although no failures of the bone transplants occurred and a high long-term survival rate of dental implants were observed, this study showed that fibula free flaps do not guarantee dimensional stability of peri-implant bone, despite the immediate blood supply delivered by the vascular pedicle. The peri-implant bone resorption was higher when compared with the one related to dental implants placed in native bone.
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Affiliation(s)
- Matteo Chiapasco
- Unit of Oral Surgery, Department of Medicine, Surgery, and Dentistry, San Paolo Hospital, University of Milan, Milan, Italy.
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Anitua E, Orive G. Short implants in maxillae and mandibles: a retrospective study with 1 to 8 years of follow-up. J Periodontol 2010; 81:819-26. [PMID: 20450361 DOI: 10.1902/jop.2010.090637] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND The aims of this study are to evaluate the long-term survival rates of short dental implants in posterior areas in both jaws and analyze the influence of different factors on implant survival. METHODS A retrospective cohort study design was used. Six hundred and sixty-one patients received 1,287 short implants (<8.5 mm) between 2001 to 2008 in Vitoria, Spain. All implant installations were performed by two experienced surgeons and rehabilitations were done by three prosthodontists. Each implant failure was carefully analyzed. The potential influence of demographic factors, clinical factors, surgery-depending factors, and prosthetic variables on implant survival was studied. Implant survival was analyzed using a life table analysis (Wilcoxon [Gehan] test). RESULTS The overall survival rates of short implants were 99.3% and 98.8% for the implant and subject-based analysis, respectively. The mean follow-up period for the implants was 47.9 +/- 24.46 months. A total of 9 out of 1,287 implants were lost during the observation period. None of the variables studied resulted in statistical association with implant failure because of the low number of failures. CONCLUSION Results of the present retrospective study show that treatment with short implants can be considered safe and predictable if used under strict clinical protocols.
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Cosyn J, Vandenbulcke E, Browaeys H, Van Maele G, De Bruyn H. Factors associated with failure of surface-modified implants up to four years of function. Clin Implant Dent Relat Res 2010; 14:347-58. [PMID: 20491819 DOI: 10.1111/j.1708-8208.2010.00282.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The relative impact of innovative treatment concepts on the failure of surface-modified implants is not well understood. This retrospective study aimed to explore this using data obtained in a university postgraduate training center. MATERIAL AND METHODS Patients treated with implants for a variety of indications over a 3-year period were included. All implants had been at least 1 year in function. Clinical records were evaluated for implant failure and in reference to implant length/diameter/location, time from tooth loss to implant placement, bone condition (native/grafted), surgical protocol (two-/one-stage), loading protocol (delayed/early/immediate), type of prosthesis (removable/fixed), surgeon's experience level (resident/trainee) and specialty (periodontist/oral surgeon). The impact of each covariate on failure was tested using the Fisher's exact test. Kaplan-Meier survival functions were constructed and Mantel-Cox log-rank tests were used to compare survival functions. To correct for possible interaction, Cox proportional Hazards regression was adopted. RESULTS Forty-one of 1,180 (3.5%) implants were lost in 34/461 (7.4%) patients (245 ♀, 216 ♂; mean age 51, range 18-90). Factors showing significant impact on failure on the basis of univariate analyses were implant location (p = .015), surgical protocol (p = .002), loading protocol (p = .002), surgeon's experience level (p = .035) and specialty (p = .001). When controlling for other covariates, only the loading protocol had a significant influence (p = .049) with early loading more prone to failure (p = .014) when compared with delayed loading. Immediate loading and delayed loading showed comparable implant survival (p = .311). CONCLUSIONS Implant therapy may be highly successful in a training center where inexperienced clinicians are strictly monitored and personally guided. Implant specific variables do not affect implant survival but early loading is a risk indicator for implant failure, whereas immediate loading is not.
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Affiliation(s)
- Jan Cosyn
- Department of Periodontology and Oral Implantology, University of Ghent, Faculty of Medicine and Health Sciences, Ghent, Belgium.
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Sailer I, Philipp A, Zembic A, Pjetursson BE, Hämmerle CHF, Zwahlen M. A systematic review of the performance of ceramic and metal implant abutments supporting fixed implant reconstructions. Clin Oral Implants Res 2009; 20 Suppl 4:4-31. [DOI: 10.1111/j.1600-0501.2009.01787.x] [Citation(s) in RCA: 216] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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