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Malchiodi L, Fiorino A, Merlino L, Cucchi A, Zotti F, Nocini PF. Analysis of ultra-short implants with different angulations: a retrospective case-control study with 2 to 9 years of follow-up. Clin Oral Investig 2024; 28:79. [PMID: 38183469 DOI: 10.1007/s00784-023-05460-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 12/18/2023] [Indexed: 01/08/2024]
Abstract
OBJECTIVES Does the angulation of ultrashort implants influence the stability of the peri-implant bone? The present study aimed to evaluate the effectiveness of non-axial ultrashort implants after 2 to 9 years of follow-up in resorbed alveolar ridges. MATERIALS AND METHODS All partially edentulous patients with ultrashort implants (< 6 mm) used in the posterior region of an atrophic mandible or maxilla, to support partial dentures in conjunction with standard implants, were included in this study. Peri-implant bone loss, success and survival rates, crestal bone levels, crown-to-implant ratio and implant angulation were measured for each implant. Implants were divided into two groups: straight implants with angulation < 17° (control group) and tilted implants with angulation > 17° (test group). Statistical analysis was used to find any significant differences between the two study groups and to investigate significant linear correlations among all the variables (p = 0.05). RESULTS A total of 42 ultrashort implants with a mean of 4 years of follow-up were included: 20 ultrashort axially loaded implants and 22 tilted implants. Mean crestal bone levels from baseline loading to maximum follow-up did not reveal statistical differences in regard to PBL; mean success and survival rates were 100% in all groups. CONCLUSIONS PBL, success and survival rates of axial ultrashort implants and tilted ultrashort implants are comparable to those of conventional implants. CLINICAL RELEVANCE This retrospective study revealed that ultrashort implants, even when placed with an angulation > 17°, can safely be used to support partial fixed prostheses. Further prospective clinical studies with larger samples and prospective design are needed to confirm these findings.
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Affiliation(s)
- Luciano Malchiodi
- Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, Piazzale A. Scuro 10, 37134, Verona, Italy
| | - Antonino Fiorino
- Department of Neuroscience, Reproductive Sciences and Dentistry, Federico II University, Via S. Pansini 5, 80131, Naples, Italy.
| | | | | | - Francesca Zotti
- Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, Piazzale A. Scuro 10, 37134, Verona, Italy
| | - Pier Francesco Nocini
- Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, Piazzale A. Scuro 10, 37134, Verona, Italy
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Shi S, Han L, Su J, Guo J, Yu F, Zhang W. Clinical efficacy of transcrestal sinus floor augmentation, in comparison with lateral approach, in sites with residual bone height ≤6 mm: A systematic review and meta-analysis. Clin Oral Implants Res 2023; 34:1151-1175. [PMID: 37548090 DOI: 10.1111/clr.14155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 07/05/2023] [Accepted: 07/19/2023] [Indexed: 08/08/2023]
Abstract
OBJECTIVE This paper addressed two focused questions: Focused question 1 (Q1) "what is the clinical efficacy of transcrestal sinus floor augmentation (TSFA), as compared to lateral sinus floor augmentation (LSFA) in sites with residual bone height (RBH) ≤6 mm, in randomized clinical trials (RCTs) and controlled clinical trials (CCTs)?"; Focused question 2 (Q2) "what is the estimated effectiveness of TSFA for outcomes in Q1, in RCTs, CCTs or cohort studies?" MATERIALS AND METHODS An electronic search (PubMed, EMBASE, The Cochrane Central Register of Controlled Trials) and hand search were conducted from January 1986 until December 2022. All eligible clinical studies expressly reporting TSFA in sites with RBH ≤6 mm were included. The data were extracted, and the risk of bias in individual studies was evaluated. Meta-analysis was performed whenever possible. RESULTS Seven RCTs were included for Q1 and 25 studies (9 RCTs, 2 CCTs, 14 single arm cohort studies) for Q2. Q1: Meta-analysis did not show significant difference in the implant survival, sinus membrane perforation and marginal bone loss between TSFA and LSFA groups. Q2: Meta-analysis showed TSFA had a high implant survival rate (96.5%, 95% CI: 93.2%-98.9%) at least 1 year after surgery, and limited sinus membrane perforation (5.4%, 95% CI: 2.7%-8.8%). The results also presented higher patient satisfaction for TSFA. CONCLUSION With the limitations of the present study (high risk of bias in individual studies), it can be concluded that there was no significant difference in implant survival, Schneiderian membrane perforation and MBL between two approaches in sites with RBH ≤6 mm.
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Affiliation(s)
- Shaojie Shi
- Department of Stomatology, 920th Hospital of Joint Logistics Support Force, Kunming, China
| | - Luyao Han
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Jun Su
- Department of Stomatology, 920th Hospital of Joint Logistics Support Force, Kunming, China
| | - Jianmei Guo
- Department of Stomatology, 920th Hospital of Joint Logistics Support Force, Kunming, China
| | - Fan Yu
- Department of Stomatology, 927th Hospital of Joint Logistics Support Force, Pu'er, China
| | - Wenyun Zhang
- Department of Stomatology, 920th Hospital of Joint Logistics Support Force, Kunming, China
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Sáenz-Ravello G, Ossandón-Zúñiga B, Muñoz-Meza V, Mora-Ferraro D, Baeza M, Fan S, Sagheb K, Schiegnitz E, Díaz L. Short implants compared to regular dental implants after bone augmentation in the atrophic posterior mandible: umbrella review and meta-analysis of success outcomes. Int J Implant Dent 2023; 9:18. [PMID: 37400739 DOI: 10.1186/s40729-023-00476-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 04/28/2023] [Indexed: 07/05/2023] Open
Abstract
PURPOSE To assess the body of evidence of short versus regular implants after bone augmentation (BA) in the atrophic posterior mandible in the context of implant treatment success outcomes. METHODS Seven databases, two registries, and reference lists were searched for systematic reviews and meta-analysis (SR/MA), randomized controlled trials (RCTs) and longitudinal studies published in English, Spanish or German since 2012. Confidence in the SR/MA methodology was evaluated using AMSTAR-2 and the risk of bias of primary studies using Cochrane's RoB 2.0 and ROBINS-I. A random-effects meta-analysis and a meta-regression were performed for continuous and dichotomous outcomes. GRADE approach was used to assess the certainty of the evidence. RESULTS Eighteen SRs/MAs, most of them "critically low" and "low" confidence with substantial overlap, included 14 relevant RCTs with a high risk of bias. A cohort study with moderate risk of bias was added. Quantitative synthesis of 595 implants and 281 hemiarches/patients indicates that the use of short implants (< 10 mm) compared to regular implants and BA may reduce implant failure at 1-year follow-up, and marginal bone loss (MBL) at 3-, 5-, and 8-year follow-up; is likely to reduce the risk of biological complications at 1-, 3-, 5-, and 8-year follow-up; and may be the patient's preferred alternative. There is a correlation between bone height, MBL and biological complications. CONCLUSIONS The available evidence partially suggests that the use of short implants could decrease implant failure, MBL, and biological complications, and increase patient satisfaction. However, given the need for further RCTs and real-world evidence to fully evaluate short- and long-term outcomes, it would be prudent for clinicians to carefully consider the individual needs and circumstances of the patients before deciding whether to use short implants. Trial registration PROSPERO CRD42022333526.
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Affiliation(s)
- Gustavo Sáenz-Ravello
- Faculty of Dentistry, Center for Epidemiology and Surveillance of Oral Diseases, University of Chile, Santiago, Chile
| | | | | | | | - Mauricio Baeza
- Faculty of Dentistry, Center for Epidemiology and Surveillance of Oral Diseases, University of Chile, Santiago, Chile
| | - Shengchi Fan
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes-Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - Keyvan Sagheb
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes-Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes-Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - Leonardo Díaz
- Faculty of Dentistry, Postgraduate School, University of Chile, Santiago, Chile.
- Department of Oral and Maxillofacial Surgery, University Medical Center of the Johannes-Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany.
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Ahmad AG, Awadalkreem F, Osman M, Palka L. Does the Protrusion of Corticobasal Implants in the Maxillary Sinuses Affect Sinus Health? A Retrospective Study. J Contemp Dent Pract 2023; 24:357-363. [PMID: 37534501 DOI: 10.5005/jp-journals-10024-3521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
AIM The aim of this retrospective study is to investigate the effect of corticobasal implant penetration in the nasal and maxillary sinuses on sinus health and implant survival rate in cases of severely atrophid ridges. MATERIALS AND METHODS This retrospective study was conducted on thirty patients with 172 implants who underwent corticobasal implant treatment between 2014 and 2018. Implants were divided into two groups according to the penetration depths (Group A, <4 mm; Group B, 4 mm). Inclusion criteria for the study included: (A) patients with severe maxillary ridge resorption with an immediately loaded corticobasal implant-supported prosthesis that showed implant protrusion inside the maxillary sinus on cone-beam computed tomography (CBCT); and (B) patients with a preoperative and postoperative follow-up CBCT scan using the same standard technique and machine. (C) Patients without any history of sinusitis before implant insertion patients who fulfilled the inclusion criteria were recalled for follow-up. The presence of sinus complications was clinically assessed according to the clinical practice guidelines for adult sinusitis of the American Academy of Otolaryngology-Head and Neck Surgery and Radiologically using CBCT. Moreover, patient satisfaction was evaluated using yes-or-no questions. The result was statistically analyzed using Fisher's Exact test. RESULTS Despite the differences in implant penetration depths, no clinical signs of sinusitis were evident in any patient. One patient presented with transient epistaxis after the surgery, and 2 patients with nine implants revealed nonsignificant thickening of the sinus membrane radiologically (p = 0.055). All implants showed optimum bone-implant contact with a 100% survival rate. A significant relationship was reported between the thickness of the membrane and the patient's gender, hypertension, and smoking habits. (p = 0.001*, p = 0.002*, and p = 0.034*, respectively). CONCLUSION Penetration of corticobasal implants in the maxillary sinus did not compromise the health of the maxillary sinus or implant survival rate. CLINICAL SIGNIFICANCE Limited posterior maxillary bony support and maxillary sinus pneumatization present challenges in implant dentistry and increase the possibility of implant protrusion inside the maxillary and nasal cavities. Hence, studying the effect of this protrusion on the maxillary sinuses' health and implant survival is highly significant.
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Affiliation(s)
- Abdelnasir G Ahmad
- Department of Oral and Maxillofacial Surgery, International University of Africa, Khartoum, Sudan
| | - Fadia Awadalkreem
- Department of Prosthodontics, RAK College of Dental Sciences, Ras Al-Khaimah, United Arab Emirates, Phone: +00971508094225, e-mail:
| | - Motaz Osman
- Department of Implant, Khartoum Teaching Dental Hospital, Federal Ministry of Health, Khartoum, Sudan
| | - Lukasz Palka
- Department of Implant, Private Dental Practice, Zary, Poland
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Bone quality effect on short implants in the edentulous mandible: a finite element study. BMC Oral Health 2022; 22:139. [PMID: 35473637 PMCID: PMC9044581 DOI: 10.1186/s12903-022-02164-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/08/2022] [Indexed: 11/24/2022] Open
Abstract
Introduction The aim of this study was to verify whether the use of short implants could optimize stress distribution of bone surrounding implants in atrophic mandibles with different bone qualities. Methods A three-dimensional model of the atrophic mandible with three levels of bone quality was made using computer software. Short implants (6 mm) and standard implants (10 mm) were used in four designs: Design 1 "All-On four", Design 2 "All-On-four" with two short implants, Design 3 four vertical implants with two short implants, and Design 4 six short implants. The distal short implants were placed at the first molar position. All twelve models were imported into finite element analysis software, and 110 N oblique force was loaded on the left second premolar. Maximum principal stress values of peri-implant bone and the volumes of bone with over 3000 microstrians (overload)were analyzed. Result Stress values and volumes of overload bone increased in all four groups with the decline of bone quality. The highest stress values were found in the cortical bone surrounding the Design 1 inclined implant in two lower bone quality mandibles, and the lowest in Design 3. However, Design 1 had less overload bone tissue than all three designs with short implants. Conclusion Short implants placed posteriorly helped decrease stress values in peri-implant bone, while bone surrounding short implants had a high resorption risk in low bone quality mandible.
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Posterior jaws rehabilitation with < 7mm-short implants. A review. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2021; 123:e45-e56. [PMID: 34563727 DOI: 10.1016/j.jormas.2021.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 07/23/2021] [Accepted: 09/21/2021] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The results with shorter and shorter implants have been revolutionizing the implantology scenario and are worthy of being well-analyzed and understood. This review aims to add further knowledge about the last 10-years observation period on < 7mm-short implants in the posterior atrophic jaws, better defining the indication of their use. METHODS From a Medline database research, systematic reviews, controlled and no- controlled trials (CT, n-CT) with ≥ 3years-follow-ups on <7 mm / ≥ 5mm-short implants (group A), and clinical studies with ≥ 1year-follow-up on 4mm-short implants (group B) were considered. The outcomes, in terms of implant survival rate (SR), marginal bone loss (MBL), and complications were analyzed according to the duration of follow-ups, implant site (maxilla and mandible), type of prosthesis (single crown or splinted units), vertically impaired or normal sites. RESULTS Thirty-four trials (28 for group A and six for group B) were selected. Group A: a mean follow up of 5,8 (3-10) years came out; pre-and post-loading SR range was 94.4- 100% and 89.6-100%, respectively; the range of MBL was 0.12-1.49; 50% of CT found less statistically significant surgical complications in comparison with standard implants (ST) in reconstructed sites, while major prosthetic problems were recorded with short -implants (SH) in 37.5% of CT; in no atrophied sites, a mean SR range of 86.7-100 % vs. 88-100 % and a total bone loss of 2 vs.1.6 for SH vs.ST emerged. Group B: the overall mean follow-up period was 2,3 years, and the pre-and post- SR ranges were 93-100 % and 87.5-100 %, respectively. The MBL range was 0.02- 0.63 mm. All RCT reported significantly fewer surgical complications with SH than with ST in reconstructed mandibles within one year. No prosthetic complications were reported for up to 5 years using no pontics or cantilevers fixed bridges. CONCLUSIONS Similar or even better results for SH than ST in terms of post-loading SR and MBL came out for < 7mm/ ≥ 5mm-short implants in atrophic bone regardless of the prosthetic solutions, with less surgical complications but a few more prosthetic problems; the good results up to 5 years for 4mm-short implants in mandibles are associated with splinted and no-risk prosthetic solutions.
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Lin ZZ, Jiao YQ, Ye ZY, Wang GG, Ding X. The survival rate of transcrestal sinus floor elevation combined with short implants: a systematic review and meta-analysis of observational studies. Int J Implant Dent 2021; 7:41. [PMID: 34013452 PMCID: PMC8134646 DOI: 10.1186/s40729-021-00325-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 03/17/2021] [Indexed: 12/16/2022] Open
Abstract
Background Currently, insufficient bone volume always occurs in the posterior maxilla which makes implantation difficult. Short implants combined with transcrestal sinus floor elevation (TSFE) may be an option to address insufficient bone volume. Purpose The clinical performance of short implants combined with TSFE was compared with that of conventional implants combined with TSFE according to the survival rate. Method In this systematic review and meta-analysis, we followed the Meta-Analysis of Observational Studies in Epidemiology (MOOSE) guidelines. Articles were identified through PubMed, Embase, the Cochrane Library, and manual searching. Eligibility criteria included clinical human studies. The quality assessment was performed according to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. The odds ratio (OR) with its confidence interval (CI) was considered the essential outcome for estimating the effect of short implants combined with TSFE. Results The registration number is INPLASY202050092. Eleven studies met the inclusion criteria, including 1 cohort study and 10 cross-sectional studies. With respect to the 1-year survival rate, no significant effect was observed between short implants (length ≤ 8 mm) and conventional implants combined with TSFE (I2=0%, OR=1.04, 95% CI: 0.55-1.96). Similarly, no difference was seen between the two groups regarding the survival rate during the healing period (I2=10%, OR=0.74, 95% CI: 0.28-1.97) and 3-year loading (OR=1.76, 95% CI: 0.65-4.74). Conclusion There was no evidence that the survival rate of short implants combined with TSFE was lower or higher than that of conventional implants combined with TSFE when the residual bone height was poor and the implant protrusion length of short implants was less than or similar to conventional implants. Nevertheless, the results should be interpreted cautiously due to the lack of random controlled trials in our meta-analysis. Supplementary Information The online version contains supplementary material available at 10.1186/s40729-021-00325-y.
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Affiliation(s)
- Zhe-Zhen Lin
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Yan-Qing Jiao
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Zhang-Yan Ye
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Ge-Ge Wang
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China
| | - Xi Ding
- Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China.
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Terheyden H, Meijer GJ, Raghoebar GM. Vertical bone augmentation and regular implants versus short implants in the vertically deficient posterior mandible: a systematic review and meta-analysis of randomized studies. Int J Oral Maxillofac Surg 2021; 50:1249-1258. [PMID: 33589294 DOI: 10.1016/j.ijom.2021.01.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/29/2020] [Accepted: 01/11/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to perform a systematic review and meta-analysis of randomized controlled trials (RCTs) comparing the outcomes of short dental implants (≤7mm) versus vertical bone augmentation followed by regular dental implants (>7mm) in the deficient posterior mandible. In total, eight RCTs (six using interpositional sandwich grafting and two using a guided bone regeneration technique) were reported in 17 articles at different time points. In the meta-analysis of the sandwich group, the relative risk (RR) for implant loss at 1year was in favour of short implants (RR 0.41, P=0.02), while no significant difference was found at 3 years (RR 0.65, P=0.43), 5 years (RR 1.08, P=0.86), or 8 years (RR 1.53, P=0.52). The risk of complications was in favour of short implants (RR 0.34, P=0.0002), as was the mean difference in marginal bone resorption after 1 year (-0.09mm, P=0.17), 3 years (-0.32mm, P<0.00001), 5 years (-0.65mm, P<0.00001), and 8 years (-0.88, P<0.00001). The mean residual osseointegration length of the implants was between 2.94mm and 4.44mm in the short implants group and between 7.97mm and 8.62mm in the regular implants group after 5 years. In conclusion, in the deficient atrophic posterior mandible, short implants and regular implants demonstrate comparable outcomes within the first 5 years. Patients who are fit for surgery should be informed about the risks and benefits of both options.
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Affiliation(s)
- H Terheyden
- Department of Oral and Maxillofacial Surgery, Red Cross Hospitals of Nordhessen, Kassel, Germany.
| | - G J Meijer
- Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - G M Raghoebar
- Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
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Iezzi G, Perrotti V, Felice P, Barausse C, Piattelli A, Del Fabbro M. Are <7‐mm long implants in native bone as effective as longer implants in augmented bone for the rehabilitation of posterior atrophic jaws? A systematic review and meta‐analysis. Clin Implant Dent Relat Res 2020; 22:552-566. [DOI: 10.1111/cid.12946] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/12/2020] [Indexed: 08/30/2023]
Affiliation(s)
- Giovanna Iezzi
- Department of Medical, Oral and Biotechnological Sciences University of Chieti‐Pescara “Gabriele D'Annunzio” Chieti Italy
| | - Vittoria Perrotti
- Department of Medical, Oral and Biotechnological Sciences University of Chieti‐Pescara “Gabriele D'Annunzio” Chieti Italy
| | - Pietro Felice
- Oral Surgery, Department of Biomedical and Neuromotor Sciences University of Bologna Bologna Italy
| | - Carlo Barausse
- Oral Surgery, Department of Biomedical and Neuromotor Sciences University of Bologna Bologna Italy
| | - Adriano Piattelli
- Department of Medical, Oral and Biotechnological Sciences University of Chieti‐Pescara “Gabriele D'Annunzio” Chieti Italy
- Biomaterials Engineering Catholic University of San Antonio de Murcia (UCAM) Murcia Spain
- Fondazione Villaserena per la Ricerca Città Sant'Angelo Pescara Italy
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences University of Milan Milan Italy
- Dental Clinic IRCCS Orthopedic Institute Galeazzi Milan Italy
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The sandwich osteotomy technique to treat vertical alveolar bone defects prior to implant placement: a systematic review. Clin Oral Investig 2020; 24:1073-1089. [DOI: 10.1007/s00784-019-03183-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 12/23/2019] [Indexed: 01/06/2023]
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Virtual Bone Augmentation in Atrophic Mandible to Assess Optimal Implant-Prosthetic Rehabilitation—A Finite Element Study. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10010401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The scope of our study was to analyze the impact of implant prosthetic rehabilitation, in bilateral terminal partial edentulism with mandibular bone atrophy, and potential benefits of mandibular bone augmentation through finite element analysis. A 3D mandible model was made using patient-derived cone-beam computed tomography (CBCT) images, presenting a bilateral terminal edentation and mandibular atrophy. A virtual simulation of bone augmentation was then made. Implant-supported restorations were modeled for each edentulous area. Forces corresponding to the pterygoid and the masseter muscles, as well as mastication conditions for each quadrant, were applied. The resorbed mandible presented high values of strain and stress. A considerable variation between strain values among the two implant sites in each quadrant was found. In the augmented model, values of strain and stress showed a uniformization in both quadrants. Virtually increasing bone mass in the resorbed areas of the mandible showed that enabling larger implants drastically reduces strain and stress values in the implant sites. Also, although ridge height difference between the two quadrants was kept even after bone augmentation, there is a uniformization of the strain values between the two implant sites in each of the augmented mandible quadrants.
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Martinolli M, Bortolini S, Natali A, Pereira LJ, Castelo PM, Rodrigues Garcia RCM, Gonçalves TMSV. Long‐term survival analysis of standard‐length and short implants with multifunctional abutments. J Oral Rehabil 2019; 46:640-646. [DOI: 10.1111/joor.12791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/28/2019] [Accepted: 03/09/2019] [Indexed: 11/30/2022]
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