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1.
Hong-Soon Kim Gyu-Tae Kim Sun Kim Jung-Woo Lee Eun-Cheol Kim Yong-Dae Kwon 《Clinical oral investigations》2016,20(5):915-922
Objective
The study aims to evaluate the pharyngeal airway space (PAS) following bimaxillary surgery in skeletal class III patients and to compare the changes in PAS between genders using cone-beam computed tomography (CBCT).Materials and methods
In all, 38 patients (16 male and 22 female) with skeletal class III malocclusion underwent bimaxillary surgery. CBCT scans were acquired approximately 1 month before surgery, 3 months after surgery, and 6 months after surgery. The oropharyngeal volume and the minimum cross-sectional area (CSA) were characterized using the InVivoDental imaging software package at each time point.Results
The volume and minimum CSA decreased significantly postoperatively, which was maintained until 6 months postoperatively (p < 0.01). The location of the minimum CSA tended to move into the retropalatal and retroglossal areas postoperatively. A strong correlation between volume and minimum CSA was found. The amount of mandibular setback was not correlated with the change in the airway. By gender, significant decreases in both the volume and minimum CSA were found in females (p < 0.05) but not in males.Conclusion
Bimaxillary surgery significantly affects PAS. Gender differences should also be considered when considering changes in PAS.Clinical relevance
An awareness of the effects of bimaxillary setback surgery on the airway should be considered when implementing an orthognathic treatment plan.2.
Mechanical and microstructural properties of fixation systems used in oral and maxillofacial surgery
Objectives
This paper aims to evaluate in vitro the mechanical and microstructural properties of internal fixation systems used in oral and maxillofacial surgeries.Materials and methods
Four brands of internal fixation systems (screws and 4-hole straight plates) were selected and assigned to four groups: G1 Leibinger®, G2 Tóride®, G3 Engimplan®, and G4 Medartis®. The systems were submitted to Vickers hardness testing, metallographic and interstitial elements chemical composition analyses. Data were submitted to ANOVA and Tukey’s test for statistical analysis.Results
Plates in groups 1, 2, and 3 showed similar microstructure and mechanical properties, different from those in G4 revealing larger grains. In all groups, the screws showed similar microstructure, with uniform arrangement and size of grains; the screws showed higher hardness values than those observed for the plates.Conclusions
The results indicate that all materials tested are adequate for use in oral maxillofacial surgeries.3.
Magno Liberato Silva Andréia Ferreira Ribeiro Fábio Ricardo Loureiro Sato Roger William Fernandes Moreira 《Oral and maxillofacial surgery》2018,22(2):193-196
Purpose
The systemic inflammatory response syndrome (SIRS) is the body’s response to an insult, such as infection, trauma, burn, and surgical stress linked to several factors deemed potential for multiple organ failure if left untreated. Thus, the aim of this paper was a prospective study to examine the incidence of SIRS in postoperative patients who underwent orthognathic surgery from June/2013 to July/2016.Methods
The sample consisted of 80 patients who underwent bimaxillary orthognathic surgery, with data on vital signs and white blood cell count collected preoperatively, and the same data collected in the immediate postoperative period, in addition to CO2 pressure in arterial blood by blood gas analysis. The data were tabulated and cases of SIRS (2 or more signs out of four pre-set signs) were identified within 24 h after surgery.Results
From the sample of 80 patients, 26 (32.5% of total) patients had SIRS with higher incidence in females who are 40 years old.Conclusion
The incidence of patients who develop SIRS after orthognathic surgery is relatively high and we should pay attention to the possible complications that these cases can evolve.4.
Fernando Zugno Kulczynski Fernando de Oliveira Andriola Pedro Henrique Deon Denizar Alberto da Silva Melo Rogério Miranda Pagnoncelli 《Oral and maxillofacial surgery》2018,22(2):143-150
Purpose
This study aimed to assess body posture before and after bimaxillary orthognathic surgery by photogrammetry in skeletal class III patients.Methods
Thirty-one patients with skeletal class III dentofacial deformities (14 men, 17 women) who underwent orthodontic preparation for surgery were included in this non-randomized controlled trial. Of these, 15 who did not undergo orthognathic surgery during the period of this study served as controls. Postural assessment was performed by photogrammetry using SAPO® (Postural Assessment Software) based on anterior-, posterior-, and lateral-view images taken 1 month before and 4 months after bimaxillary orthognathic surgery with internal rigid fixation (or 4 months after the initial assessment, for the control group). The study was approved by PUCRS Research Ethics Committee, and written informed consent was obtained from all individual participants prior to their inclusion in the study.Results
There was no significant difference between groups for age, gender, and GAP. In the intervention group, the right leg/hindfoot angle, which initially indicated a valgus deformity, normalized after intervention (P?<?0.048). Posterior displacement of the head (P?<?0.005) and trunk (P?<?0.004) were observed after intervention.Conclusions
These results suggest that correction of class III dentofacial deformities by bimaxillary orthognathic surgery can produce systemic postural adjustments, especially posterior displacement of the head and trunk and knee and ankle valgus.5.
Bruno Ramos Chrcanovic Guilherme Lacerda de Toledo Márcio Bruno Figueiredo Amaral Antônio Luís Neto Custódio 《Oral and maxillofacial surgery》2016,20(1):35-43
Purpose
The purpose of the study was to evaluate changes of hematologic parameters in bimaxillary surgery.Methods
Fifty-three patients were prospectively evaluated and divided into groups based on the surgical procedure and sex (predictor variables). Hemoglobin, red blood cells, hematocrit, and platelet were the primary outcome variables, operation time the secondary outcome, and the patients’ age and weight the other variables. Trial registration: NCT02364765 (U.S. National Institutes of Health, clinicaltrials.gov).Results
There was statistically significant difference between all hematologic parameters before and after surgery, for both men and women, and for all surgical groups. There was a positive correlation between operative time and the decrease (in %) of the hematologic parameters. Linear regression analysis suggested that the Hb values decrease 0.083 % for every minute increase in the operation time, and 0.066, 0.066, and 0.010 % for RBC, Hct, and platelet count, respectively. There was a negative correlation between weight and all hematologic parameters. Correlations between age and hematologic parameters were not statistically significant. Almost all correlations between age, weight, sex, and the surgery group and the hematologic parameters were considered as very weak. Only one patient was transfused.Conclusions
It is suggested that operation time and patient’s weight play a bigger role than patient’s age and sex in the decrease of hematologic parameters after bimaxillary surgery.6.
Manal Farea Adam Husein Ahmad Sukari Halim Zurairah Berahim Asma Abdullah Nurul Khairani Idah Mokhtar Kasmawati Mokhtar 《Clinical oral investigations》2016,20(6):1181-1191
Objectives
The purpose of this study was to evaluate the synergistic effect of epithelial rests of Malassez cells (ERM) and transforming growth factor-β1 (TGF-β1) on proliferation, cementogenic and osteogenic differentiation of stem cells derived from human exfoliated deciduous teeth (SHED).Materials and methods
SHED were co-cultured with ERM with/without TGF-β1. Then, SHED proliferation, morphological appearance, alkaline phosphatase (ALP) activity, mineralization behaviour and gene/protein expression of cemento/osteoblastic phenotype were evaluated.Results
TGF-β1 enhanced SHED proliferation when either cultured alone or co-cultured with ERM. ERM induced the cementoblastic differentiation of SHED which was significantly accelerated when treated with TGF-β1. This activity was demonstrated by high ALP activity, strong mineral deposition and upregulation of cementum/bone-related gene and protein expressions (i.e. ALP, collagen type I, bone sialoprotein, osteocalcin and cementum attachment protein).Conclusions
ERM were able to induce SHED differentiation along the cemento/osteoblastic lineage that was triggered in the presence of TGF-β1.Clinical relevance
The cemento/osteoblastic differentiation capability of SHED possesses a therapeutic potential in endodontic and periodontal tissue engineering.7.
Milena Cabral Leila Ribeiro Brito de Queiroz Ribeiro Carlos Maurício Cardeal Marcos Alan Vieira Bittencourt Iêda Margarida Crusoé-Rebello Adelmir Souza-Machado 《Oral and maxillofacial surgery》2017,21(1):27-31
Purpose
This study aimed to evaluate the dimensions of the oropharynx and its shape in the minimum cross-sectional area, in individuals with Class I and Class II skeletal patterns, using three-dimensional CBCT images.Methods
Forty-two cone-beam computed tomography images of grown individuals were evaluated. The images were divided according to the patient’s skeletal patterns. The dimensions of the oropharyngeal airway space were determined using the Dolphin Imaging software.Results
The volume and the minimum cross-sectional area were greater in patients with a Class I skeletal pattern, with a median difference of 5379 mm3 and 86.8 mm2, respectively. The anteroposterior and lateral diameters in the minimum cross-sectional area were also higher in Class I individuals (2.3 and 6.0 mm, respectively), but the ratio between them was not different.Conclusions
The volume and the minimum cross-sectional area of the oropharynx, as well as the anteroposterior and lateral diameters, are lower in individuals with a class II skeletal pattern than in individuals with a class I skeletal pattern. There was no difference in the shape of the oropharynx in healthy individuals with different skeletal patterns.8.
Marianna De Colli Paolo Tortorella Guya Diletta Marconi Mariangela Agamennone Cristina Campestre Marilena Tauro Amelia Cataldi Susi Zara 《Clinical oral investigations》2016,20(8):2013-2021
Objectives
Bisphosphonates (BPs) are drugs clinically used in resorptive diseases. It was already proved that some clinically relevant BPs can inhibit a class of enzymes called matrix metalloproteinases (MMPs), required during tissue remodelling. Combining the arylsulfonamide function with the bisphosphonic group, several compounds were synthesized to obtain selective inhibitors of MMPs. The aim of the present study was to compare the effect of zoledronic acid (ZA), the most potent bisphosphonate available as therapy, with new sulfonamide containing BPs in an in vitro model of human gingival fibroblasts (HGFs).Materials and methods
Western blot was used to measure procollagen I, β1 integrin MMP-8 and MMP-9, phase contrast and MTT for cell viability; L-lactate-dehydrogenase (LDH) measurement was performed for toxicity evaluation and ELISA for prostaglandin E2 (PGE2) secretion assessment.Results
When compared with ZA, the treatment with the newly synthesized compounds shows increasing viability, procollagen I expression and decreased expression of β1 integrin in HGFs. Higher levels of released LDH, PGE2 and MMP-9 expression are recorded in ZA-treated HGFs. Increased levels of MMP-8 are recorded in newly synthesized compounds-treated samples.Conclusions
These findings allowed to conclude that new tested BPs did not affect HGFs viability and adhesion, did not induce cellular toxicity, were not responsible for inflammatory event induction and could preserve the physiological matrix turnover.Clinical Relevance
It could be hypothesized that the new molecules were better tolerated by soft tissues, resulting in lesser side effects.9.
Ashok Kumar Jena Vidya Rattan Satinder Pal Singh Ashok Kumar Utreja Singh Sombir 《Journal of maxillofacial and oral surgery》2016,15(1):12-17
Purpose
To test the hypothesis that there is no immediate and long-term effects of maxillary distraction osteogenesis (DO) on nasal index among adult subjects with cleft lip and palate deformities.Materials and Methods
Twelve adult subjects in the age range of 17–20 years with complete unilateral cleft lip and palate underwent advancement of maxilla by DO. The immediate and long-term effects of maxillary DO on nasal index were evaluated from extra-oral full face frontal photographs recorded prior to DO (T0), at the end of active DO (T1) and at least 2-years after the DO (T2). The ANOVA, Post Hoc test (Bonferroni) and Pearson correlation coefficients were used. The probability value (P value) 0.05 was considered as statistically significant.Results
SNM angle and Ptm-M distance increased significantly by DO (P < 0.001). The nasal index increased significantly (P < 0.01) by 13.85 % from T0 value of 85.15 ± 4.49 to 99.02 ± 11.16 % at the end of active distraction (T1) and by 12.69 to 97.84 ± 9.14 % at the end of long-term follow-up (T2). The correlation between sagittal maxillary advancement and nasal index was statistically significant (P < 0.001). For each millimeter of maxillary advancement, the nasal index increased by 1.38 % and 1.8 % at the end of active distraction and long-term follow-up respectively.Conclusion
The advancement of maxilla by distraction osteogenesis among subjects with cleft lip and palate deformities increased nasal index significantly.10.
Camila Nunes Carvalho Rodrigo Feliciano do Carmo Angela Luzia Pinto Duarte Alessandra Albuquerque Tavares Carvalho Jair Carneiro Leão Luiz Alcino Gueiros 《Clinical oral investigations》2016,20(3):495-502
Objective
The aim of this study was to evaluate the influence of Th17 polymorphisms on the susceptibility or severity of rheumatoid arthritis (RA) and Sjögren’s syndrome (SS).Materials and methods
The study sample comprised 206 individuals of both genders divided into three groups: exclusive rheumatoid arthritis (RA—100 patients), rheumatoid arthritis and Sjögren’s syndrome (RA/SS—31 patients), and healthy controls (C—75 individuals). All the individuals were submitted to clinical evaluation, unstimulated sialometry, and Schirmer test; some patients with RA were also submitted to minor salivary gland biopsy for definition of SS diagnosis. Saliva samples were collected for isolation of DNA and genotyping of Th17 genes; IL-17A (-197G/A) and IL-17F (7488T/C).Results
IL-17A (-197G/A) and IL-17F (7488T/C) SNPs were not associated with susceptibility to RA or secondary SS (sSS, p > 0.05 for both SNPs). In addition, they did not influence RA activity or clinical markers of SS.Conclusion
IL-17A (-197G/A) and IL-17F (7488T/C) polymorphisms are not associated with the susceptibility nor to the severity of RA and sSS in the studied population.Clinical relevance
A better understanding of the pathogenesis of SS is demanded to an adequate treatment as well as to the development of new management strategies.11.
Velupillai Ilankovan 《Journal of maxillofacial and oral surgery》2017,16(1):3-12
Introduction
Facial balance is achieved by correction of facial proportions and the facial contour. Ageing affects this balance in addition to other factors. We have strived to inform all the recent advances in providing this balance.Method
The anatomy of ageing including various changed in clinical features are described. The procedures are explained on the basis of the upper, middle and lower face.Results
Different face lift, neck lift procedures with innovative techniques are demonstrated.Conclusion
The aim is to provide an unoperated balanced facial proportion with zero complication.12.
Jannice de Queiroz Fernandes Valthierre Nunes de Lima João Paulo Bonardi Osvaldo Magro Filho Sormani Bento Fernandes Queiroz 《Journal of maxillofacial and oral surgery》2018,17(1):13-18
Aim
The aim of this work was to perform a systematic literature review on the clinical application of rhBMP-2 in bone reconstruction prior to placing implants.Materials and Methods
A PUBMED search was made about the subject and nine clinical trials were selected according to strict inclusion criteria.Results
Overall success rates of bone regeneration with rhBMP-2 was 81.4% and success of implants placed was 87.4%. Most frequent adverse events were pain, edema and erythema.Conclusion
It was concluded that the treatment with rhBMP-2 foi satisfactory in most cases and the placement of dental implants in the bone regenerated with rhBMP-2 is feasible.13.
Matteo Brucoli Roberta Sonzini Michela Bosetti Paolo Boffano Arnaldo Benech 《Oral and maxillofacial surgery》2018,22(3):309-313
Objectives
Over the past few years, studies about growth factors have been increasingly developed and the knowledge of their role in stimulating cell proliferation and differentiation used for therapeutic purposes. This study aims to compare a platelets concentrate, the plasma rich in growth factors (PRGF) to a control, consisting of cellulose membranes, to evaluate in vitro the cellular adhesion and migration of human osteoblasts (hOb) and understand if the use of platelets concentrates could be an advantage in view of bone tissue regeneration.Study design
Twenty-seven human donors provided 27 blood samples used to make 54 samples: 27 for PRGF and 27 for the control group. PRGFs and controls were incubated for 48 h in sterility in 1 ml of culture with 105 hOb and hOb in the scaffolds were then quantified.Results
In PRGF samples, hObs were more numerous than in controls. (T?=?6.6964, p?<?0.0001).Conclusions
Human osteoblasts are driven to colonize PRGFs with a greater efficacy than negative controls, probably due to the presence of chemokines and growth factors in PRGFs.14.
15.
Marcio Bruno Figueiredo Amaral Sebastião Cristian Bueno Icaro Buchholz Abdala Roger Lanes da Silveira 《Oral and maxillofacial surgery》2017,21(3):357-361
Purpose
The present study aims to describe three cases of patients inflicted by rubber bullets with severe facial fractures.Methods
In addition, a review of English-language literature involving facial fractures by rubber bullets from 1975 to 2016 was performed.Results
This current study demonstrated that the use of the LLRBW is unsafety even when applied by police enforcements exclusively.Conclusions
Management of facial fractures caused by LLRBW is done in a usual manner with closed or open reduction associated with bone mini-plates or reconstruction plates when indicated. Special initial wound care should be done to avoid secondary infection and additional procedures.16.
Neelam Noel Andrade Paul C. Mathai Sriram Ganapathy Neha Aggarwal Kamil Rajpari Trupti Nikalje 《Oral and maxillofacial surgery》2018,22(4):409-418
Introduction
In severe TMJ ankylosis cases, the lack of growth of the mandible creates an anatomically narrow airway with a reduced pharyngeal airway space [PAS] which predisposes these patients towards obstructive apnoea [OSA]. There is evidence in the literature that such patients experience severe discomfort during physiotherapy if such airway abnormalities are not corrected prior to ankylosis release. This eventually leads to non-compliance towards physiotherapy and increases the risk of re-ankylosis.Objective
In our study, pre-arthroplastic mandibular distraction osteogenesis [DO] was used to increase the PAS and resolve the underlying OSA prior to releasing the ankylosis.Materials and methods
Twenty-five cases of TMJ ankylosis with micrognathia and OSA were included in this prospective observational sleep study. They were further divided into a paediatric group [14 subjects] and an adult group [11 subjects]. All cases presented with a history of onset of ankylosis during childhood [before the completion of craniofacial growth] as result of which there was a lack of forward growth of the mandible. Subjects included in our study underwent initial DO of the mandible followed by a second procedure for distractor removal and ankylosis release. Questionnaires, lateral cephalograms and sleep studies were taken pre-operatively (T0), immediate post-distraction to the desired length (T1) and 12 months post the distractor removal and ankylosis release (T2). The parameters studied were PAS width, apnoea hypopnea index [AHI], O2 saturation, mouth opening and mandibular advancement.Results
The paediatric group variables were as follows: mean PAS width which increased from 3.5 mm [T0] to 9 mm [T2], mean AHI which decreased from 48.04 [T0] to 3.60 [T2], mouth opening which increased from 4.5 mm [T0] to 34 mm [T2] and mean O2 saturation which increased from 89.86% [T1] to 96.88% [T2]. The adult group variables were as follows: mean PAS width which increased from 5 mm [T0] to 11 mm [T2], mean AHI which decreased from 31.45 [T0] to 1.43 [T2], mouth opening which increased from 5 mm [T0] to 34 mm [T2] and mean O2 saturation which increased from 92.01% [T0] to 96.84% [T2]. Statistical analysis revealed that DO of the mandible significantly improved OSA by increasing the PAS which was evident by the lower AHI score. Mouth opening was also significantly improved post ankylosis release and maintained at the T2 interval. Ten subjects followed up beyond the T2 interval [mean 28 months post ankylosis release] and their data also revealed positive compliance towards physiotherapy, adequate mouth opening and maintenance of normal AHI.Conclusion
Pre-arthroplastic mandibular DO has proved to be a successful modality for treatment of OSA in TMJ ankylosis patients with stable results at 12 months. By resolving the narrow airway and OSA, compliance towards physiotherapy was improved thus reducing the risk of re-ankylosis in the long term.17.
Mustafa Barış Güncü Umut Cakan Guliz Aktas Güliz Nigar Güncü Şenay Canay 《Clinical oral investigations》2016,20(9):2467-2473
Objectives
This study aims to evaluate the 4-year clinical performance of tooth versus implant-supported single-unit zirconia crowns (LAVA?) placed on posterior region.Materials and methods
Twenty-four patients (10 men and 14 women) who had received 48 single crowns (24 implant-supported and 24 tooth-supported) from January 2007 to December 2009, were included. California Dental Association (CDA) quality assessment system, plaque and gingival index scores were used to evaluate the performance of the crowns at baseline and at all follow-up examinations.Results
During the follow-up period, no fracture of zirconia coping has occurred. Major complication was chipping in three patients that required a new crown fabrication. Except for the failure ones, all crowns in both groups were rated as satisfactory at the follow-up examinations based on the CDA quality assessment criteria. There were no statistically significant differences between tooth and implant-supported crowns in terms of periodontal parameters.Conclusions
The present 4-year follow-up clinical study demonstrates that single-unit tooth- and implant-supported zirconia crowns have similar prosthetic and periodontal outcomes.Clinical relevance
Single-unit implant or tooth-supported zirconia crowns may be considered acceptable treatment modalities for restoration of either missing or compromised posterior teeth18.
Lucas Borin Moura Marisa Aparecida Cabrini Gabrielli Mario Francisco Real Gabrielli Valfrido Antonio Pereira Filho 《Oral and maxillofacial surgery》2017,21(1):65-68
Purpose
The goal of orbital reconstruction is to restore anatomy, volume, and function. In extensive orbital floor defects, the visualization of the posterior area is limited through inferior eyelid incisions. The use of endoscope may improve the treatment; however, it is a high-sensitivity technique. The aim of this case series is to describe the combination of inferior eyelid incision with transantral endoscopy for treatment of extensive orbital floor defects.Methods
Three patients were submitted to orbital reconstruction, and the postoperative CT scans were evaluated to analyze the orbital volume and anteroposterior globe position. Surgical treatment was performed using subciliary inferior palpebral approach to explore the orbital floor and placement of the titanium mesh and an intraoral antrostomy for endoscopy to magnification of the surgical field and adaptation of the mesh.Results
Postoperative CT scan analysis shows that all treatments restored orbital volume and globe position without compression or damage of the optical nerve.Conclusion
The use of endoscope allowed the precise visualization of the posterior region of the orbit and adaptation of the titanium mesh.19.
Serhat Sezgin Metin Sencimen Aydin Gülses Fevzi Erdemci Mustafa Ayna İsmail K. Gider Onder Ongoru Tuncer Cayci 《Oral and maxillofacial surgery》2016,20(3):273-279
Aim
The aim of this study is to assess the effects of triester glycerol oxide (TGO) on cutaneous wound epithelization process.Material and methods
Fifty-four male Wistar rats were divided into 2 groups of 27 rats each: control(C) and TGO (PX). The groups have been divided into three subgroups which included nine rats each regarding the wound excision on the 3rd, 7th, and 10th days, respectively. The specimens were evaluated according to histological properties and hydroxyproline levels.Results
Seventh day examination showed that PX and control groups present the same score. HP levels in the control group were significantly lower compared to PX groups.Conclusion
TGO have positive effects on wound epithelization process by increased collagen synthesis.20.