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1.
Elika Madani Ralf Smeets Eric Freiwald Maryam Setareh Sanj Ole Jung Daniel Grubeanu Henning Hanken Anders Henningsen 《Journal of cranio-maxillo-facial surgery》2018,46(7):1139-1146
Purpose
The preservation of peri-implant bone is one requirement for long-term success of dental implants. The purpose of this study was to evaluate the impact of subcrestal placement on the crestal bone level of immediate versus delayed placed implants after loading.Materials and methods
In this retrospective study, data of 159 patients who received 330 implants was analyzed. Implants were placed subcrestally, crestally or supracrestally into fresh sockets or healed sites. Vertical bone level height was assessed radiographically and implants were followed up annually. The influence of patient and implant related risk factors for peri-implant bone loss was evaluated using a linear mixed model.Results
Depth of implant placement was significantly correlated with peri-implant bone loss (P = 0.001, 95% CI). Least effective loss of crestal bone was determined when implants were placed between 1 mm and 1.99 mm subcrestally. Smoking significantly enhanced the risk of peri-implant bone loss (P = 0.04, 95% CI). Immediate implant placement was not positively correlated with peri-implant bone loss (P = 0.51, 95% CI).Conclusion
Within the limits of this study, implant placement 1.08 mm subcrestally may be recommendable in order to avoid supracrestal expositions of platform-switched titanium implants over time. 相似文献2.
Niels Christian Pausch Christoph Paul Kuhnt Dirk Halama 《Journal of cranio-maxillo-facial surgery》2018,46(10):1843-1849
Introduction
For treatment of lagophthalmos, metallic weight implants can be inserted in the upper eyelid to aid eyelid closure. Rigid and flexible implants are available. The objective of this study was to investigate the effect of implant type and patient variables on the survival of lid load implants.Materials and methods
Forty-four patients with lagophthalmos were recruited to undergo upper-eyelid weight implantation. The predictor variable was type of implant inserted (rigid or flexible). The outcome variable was survival of the inserted implant (survival or extrusion). Other study variables were demographic data (age, gender), implant features (material, weight), and other conditions, such as history of radiation. An NMLE test was used to compare implant survival, depending on implant type (flexible versus rigid). Other variables were analysed by use of a χ2 test.Results
Forty-four participants were recruited, 29 female (65.9%) and 15 male (34.1%). Forty-six implants (23 rigid implants, 50.0%; 23 flexible implants, 50.0%) were inserted (bilateral implantation in two patients). The average weight of implants used was 1.76 g (range 1.4–2.2 g). One to two years after surgery, average vertical aperture (eyelid gap) for the closed eye was 0.65 mm (range 0–4 mm). Incidence of extrusion was 15.2% (one in the rigid implant group, 2.2%; six in the flexible implant group, 13.0%). Incidence of extrusion was significantly higher for flexible implants than for rigid implants (p = 0.0273).Conclusions
The study results suggest that flexible implants are more likely to perforate the skin. The assumed advantages of the expensive chain lid weight must, therefore, be re-evaluated. 相似文献3.
Michael W. Noller Christian Guilleminault Christopher J. Gouveia Douglas Mack Cindy L. Neighbors Soroush Zaghi Macario Camacho 《Journal of cranio-maxillo-facial surgery》2018,46(8):1296-1302
Objectives
Mandibular distraction osteogenesis and mandibular advancement, collectively referred to as mandibular advancement surgeries (MAS), have been used to treat children with mandibular insufficiency and obstructive sleep apnea (OSA). The objective is to perform a systematic review and meta-analysis for MAS as treatment for obstructive sleep apnea.Methods
Three authors searched multiple databases (including PubMed/Medline) from inception through April 25, 2018.Results
1198 studies were screened, 128 were downloaded and 37 met inclusion criteria (376 patients, mean age: 1.5 years). Meta-analysis demonstrated a reduction in the apnea-hypopnea index (AHI), from a mean ± SD of 41.1 ± 35.8 to 4.5 ± 6.0 events per hour (89.1% decrease). The lowest oxygen saturation (LSAT) in 211 patients increased from a mean ± SD of 76.8 ± 13.0 to 91.1 ± 8.6 (14.3 oxygen saturation point increase). Individual patient data (105 patients) demonstrated AHI surgical success in 73.4% of patients and respiratory disturbance index (RDI) surgical success in 100% of patients. AHI surgical cure was seen in 25.5% of patients and RDI surgical cure was seen in 37.5% of patients.Conclusions
This study's major finding is that obstructive sleep apnea has dramatically improved in pediatric patients with mandibular insufficiency when they have been treated with mandibular advancement or mandibular distraction osteogenesis. 相似文献4.
Marcelo Coelho Goiato Henrique Rinaldi Matheus Rodrigo Antonio de Medeiros Daniela Micheline dos Santos Sandro Basso Bitencourt Aldiéris Alves Pesqueira 《The Journal of prosthetic dentistry》2017,117(5):685-689
Statement of problem
The rehabilitation of patients after a maxillectomy involves the use of an obturator to seal oral-nasal-sinus communication and to facilitate mastication, swallowing, and speech.Purpose
The purpose of this in vitro study was to evaluate different attachment systems used for implant-retained obturators at dissipation loads and under shear forces.Material and methods
Photoelastic models were fabricated with 3 external hexagon implants at the incisor, canine, and first molar regions. Subsequently, overdentures were made, and metal hooks were placed at the incisor and first molar regions to displace the prostheses in the vertical, anterior, and posterior directions, with a constant speed of 50 mm/min. A photoelastic model with an O-ring or bar-clip system was placed in a circular polariscope, and tested with a universal testing machine. The images were recorded and high-intensity fringes were counted using software. For strain gauge analysis, each strain gauge was placed horizontally at the mesial and distal sides of the implants. The registered strains were submitted to 2-way ANOVA (α=.05).Results
The O-ring showed the lowest number of high-intensity fringes in photoelastic imaging, while the strain gauge analysis showed the lowest stress values in the bar-clip group (P=.007).Conclusions
The stress around titanium implant necks was more damaging to surrounding bone, while the bar-clip attachment system had a better biomechanical performance. The bar-clip presented the lowest strain values around the dental implants and few high-intensity fringes. 相似文献5.
Yi-Fang Huang Chung-Ta Chang Chih-Hsin Muo Hsiang-Hsi Hong Yu-Fu Shen Chia-Chang Lin Shih-Ping Liu 《Journal of cranio-maxillo-facial surgery》2018,46(11):1979-1983
Purpose
The aim of this study was to investigate how the physical variables of fibular reconstructed mandibles with dental implants affects the relative bite force in oral cancer patients.Materials and methods
Over 7 years of follow-up, 13 oral cancer patients were enrolled who included 51 successful implants in the fibular flap. The tactile sensor analyzer evaluated the bite force. The crown-implant ratio, fibular, and rehabilitated dental length were measured using radiographic images. Linear regression was used to analyze the bite force related to the variables of the implants in the fibular reconstructed mandible.Results
Even when the results showed no statistical significance (P > 0.05), increasing the crown-implant ratio, length of the fibular flap, and implant prosthetic reconstructed dentition had a tendency to decrease the bite force (estimate from ?0.08% to ?4.27%); there was a positive trend of occlusal force and the length of rehabilitative dentition compared with the dental antagonist (estimate = 6.95).Conclusion
In this study, the crown-implant ratio, implant dentition, and fibular flap length revealed no significant impact on the bite force or implant success in oral cancer patients; however, a trend to weaken the bite force was suggested once the numerical values of these variables increased. 相似文献6.
Shirin Allouch Henning Lünenbürger Martin Klein Kai Wermker 《Journal of cranio-maxillo-facial surgery》2018,46(12):2214-2219
Background
After orbital exenteration a facial prosthesis is a viable option for rehabilitation. The aim of this study was to evaluate implant loss and peri-implantitis of solitary orbital implants with regard to risk factors.Patients and methods
Implant loss (primary outcome) and periimplantitis (secondary outcome) were reviewed retrospectively in patients who received orbital implants between 2006 and 2015 with a minimum follow-up time of 12 months. Potential risk factors were analyzed using univariate and multivariate statistics.Results
94 patients were included with 371 inserted implants and 326 implants remaining for final analysis. At the time of last follow-up 18.1% (59/326) of the implants were lost and 3.4% showed signs of periimplantitis but were still stable in situ. Daily smoking (p = 0.016, OR = 2.1), irradiation (p < 0.001, OR = 2.8) and daily alcohol abuse (p = 0.028, OR = 3.1) had a significant effect on periimplantitis and implant loss. Combining smoking and irradiation, implant failure was 46.9% versus 15.0% in patients without these risk factors (p < 0.001, OR = 5.0). Age, tumor entity, ASA Score, anticoagulation, chemotherapy, diabetes and implant position did not show a significant correlation for implant loss or – except for age – periimplantitis. Younger patients showed a higher risk of developing periimplantitis (p = 0.011).Conclusion
Orbital prostheses retained by solitary implants provide a solid option to reconstruct facial defects. Whereas in general high implant survival can be expected, they should be carefully considered in patients with the risk factors irradiation, smoking and alcohol abuse. 相似文献7.
Lucia Fernandez-Estevan Javier Montero Eduardo J. Selva Otaolaurruchi Fernanda Sola Ruiz 《The Journal of prosthetic dentistry》2017,117(3):367-372
Statement of problem
Whether clinical or demographic variables affect the perception of treatment in terms of quality of life and satisfaction is unknown.Purpose
The purpose of this prospective study was to make an evidence-based assessment of the treatment outcomes (patient- and clinically based) of locator-retained mandibular overdentures.Material and methods
This prospective observational study assessed patients with edentulism who had worn mandibular overdentures supported by 2 implants and retained by the locator system for at least 1 year of functional life (N=80). Medical histories were reviewed, and patients underwent oral examinations. Prosthetic clinical outcomes and patient well-being were registered using the Oral Health Impact Profile 20 (OHIP-20) and Oral Satisfaction Scale (OSS).Results
Patient well-being scored an overall OHIP-20 score of 19.0 ±14.0 of 80 (the higher the score, the greater the impact and the worse the oral health-related quality of life); overall oral satisfaction was 8.3 ±1.7 of 10. Women suffered greater social impact (0.8 ±1.0) and disability (0.4 ±0.8) than men (0.4 ±0.7 versus 0.2 ±0.4, respectively). Impact on well-being was inversely proportional to both patient age and the age of the prosthesis (r=-0.25; P<.01). Implants had been placed on average 73.6 ±39.2 months previously, showing a survival rate of 82.5%. Most of the overdentures had been functioning for over 60 months. Relining (46.3%), readjustments (82.5%), and changes of nylon retention (1.5 ±1.8 per patient over 60 months of use) devices negatively influenced well-being.Conclusions
Mandibular overdentures produced good results with regard to quality of life and oral satisfaction, but attention should be paid to factors affecting clinical outcomes and patient well-being. 相似文献8.
Sankeerth Rampa Fernando A. Wilson Hongmei Wang Nizar K. Wehbi Lynette Smith Veerasathpurush Allareddy 《Journal of Evidence》2018,18(2):119-129
Objectives
Hospital-based emergency department (ED) visits for dental problems have been on the rise. The objectives of this study are to provide estimates of hospital-based ED visits with dental conditions in New York State and to examine the impact of Medicaid reimbursement fee for dental services on the utilization of EDs with dental conditions.Methods
New York State Emergency Department Database for the year 2009-2013 and Health Resources and Services Administration's Area Health Resource File were used. All ED visits with diagnosis for dental conditions were selected for analysis.Results
The present study found a total of 325,354 ED visits with dental conditions. The mean age of patient was 32.4 years. A majority of ED visits were made by those aged 25-44 years (49%). Whites comprised 52.1% of ED visits. Proportion of Medicaid increased from 22% (in 2009) to 41.3% (in 2013). For Medicaid patients, the mean ED charges and aggregated ED charges were $811.4 and $88.1 million, respectively. Eleven counties had fewer than 4 dentists per 10,000 population in New York State.Conclusion
High-risk groups identified from the study are those aged 25-44 years, uninsured, covered by Medicaid and private insurance, and residing in low-income areas. The study highlights the need for increased Medicaid reimbursement for dentists and improves access to preventive dental care especially for the vulnerable groups. 相似文献9.
Jonathan C. Simmonds Anju K. Patel Nicholas S. Mader Andrew R. Scott 《Journal of cranio-maxillo-facial surgery》2018,46(3):498-503
Objectives
To examine the frequency of partial glossectomy performed for the indication of macroglossia in children within the United States, assessing for differences in rates of intervention across various demographics.To identify potential morbidities associated with partial glossectomy in this population and determine how such factors may influence length of stay and cost of admission following tongue reduction surgery.Study Design
Retrospective cross-sectional study.Setting
The Kids' Inpatient Database 2003, 2006, 2009, and 2012.Subjects
Patients under age 5 diagnosed with macroglossia who underwent partial glossectomy.Methods
Demographics were analyzed and cross tabulations, linear regression modeling, and multivariate analysis were performed.Results
During the four-years studied, partial glossectomy was performed in 196 children under age 5 with macroglossia. A disproportionately higher rate of intervention was seen in white children (p = 0.001), patients undergoing surgery in the mid-west (p < 0.001) and patients in the highest socioeconomic quartile (p = 0.015). Most patients underwent glossectomy in their second year of life. The average length of stay in patients who underwent partial glossectomy for macroglossia was 9.59 days (Range 1–211 days, median 3.45 days) and the average cost was $56,602 (median $16,330).Conclusion
Partial glossectomy for macroglossia is typically performed prior to age 2 in the United States. A higher rate of intervention is seen in white children, those who have surgery in the mid-west and affluent children even when controlling for confounding variables.Level of evidence
III. 相似文献10.
Frederik Curvers Nastaran Meschi Anke Vanhoenacker Olaf Strijbos Maarten Van Mierlo Paul Lambrechts 《Journal of endodontics》2018,44(1):32-37
Introduction
The aim of this study was to present ultrasound imaging (UI) techniques as promising and safe tools for the follow-up of root-end surgery (RES) in vivo.Methods
The study included 8 patients who underwent RES. All were followed up using UI at 1 week, 1 month, 2 months, 3 months, and 6 months (if necessary) after RES. The bony crypt was defined on the ultrasound image, and the following observations were made during follow-up: cortical bone interruption and surface area measurement of the residual echoic bony crypt image.Results
In all cases, the hypoechoic image became hyperechoic, indicating gradual bone healing of the crypt. Compared with baseline, at 3 months a remaining cortical opening of 51.2% (±12.6%) and a bony crypt surface area of 24.3% (±10.8%) was detected for all patients. For 50% of the patients, the echographic follow-up ended at 3 months because the ultrasound waves could no longer enter the bony crypt. For 4 patients who attended the 6-month recall, a remaining cortical disruption of 43.2% (±9.9%) and a bony crypt surface area of 17.2% (±7%) compared with the baseline was noted.Conclusions
UI is a promising follow-up tool for RES. It helps clinicians understand the initial stages of bone healing, allows close healing monitoring, and is radiation free. 相似文献11.
Sébastien Mbuyi-musanzayi Tony J. Kayembe Marc K. Kashal Prosper T. Lukusa Prosper M. Kalenga François K. Tshilombo Koenraad Devriendt Hervé Reychler 《Journal of cranio-maxillo-facial surgery》2018,46(7):1051-1058
Purpose
To determine the incidence and risk factors of occurrence of non-syndromic cleft lip and/or cleft palate (NSCLP) in Lubumbashi.Method
A case-control study was conducted in the health district of Lubumbashi from February 2012 to December 2015. An exhaustive sampling, collecting all newborns with cleft lip and/or cleft palate (CL ± P) in maternity wards was conducted. From a total of 172 cases, 162 non-syndromic cases were recruited. For each case, one clinically normal newborn control was selected.Results
NSCLP had an incidence of 1/1258 live births (0.8/1000). We found significant associations with a family history of cleft lip and palate (CLP) (x2family history = 11.5, p = 0.0007), maternal alcohol intake (OR = 19.3, 95% CI: 1.9–197.1), paternal alcohol during the periconceptional period and the first trimester of pregnancy (OR = 18.7, 95% CI: 3.9–89.2), maternal educational level lower than high school (OR = 9.5, 95% CI: 2.0–44.7), clay (Pemba) consumption during pregnancy (OR = 38.3, 95% CI: 9.3–157.0), the use of insecticides in the evening (OR = 130.3, 95% CI: 13.2–1286.9), indoor cooking with charcoal (Makala) (OR = 6.5, 95% CI: 1.22–34.5), and regular consumption of Kapolowe fish, supposedly contaminated with heavy metals (OR = 29.5, 95% CI: 7.4–116.7).Conclusion
Several environmental risk factors highly prevalent in Central Africa for facial clefting were found. 相似文献12.
Objective
The study compared manual and rotary canal instrumentation differences in primary molars receiving pulpectomy and their effect on clinical success after two years.Materials and methods
Sixty pulpally involved primary mandibular second molars requiring pulpectomy treatment were randomly assigned for manual or rotary instrumentation in children aged 4–7 years. The endodontic procedural steps were similar except the method of root canal instrumentation i.e. manual group (Stainless steel files 2% taper) and rotary group (Hyflex CM NiTi rotary files 4% taper).Results
The mean instrumentation time for the manual and rotary groups were 25.71 ± 3.84 and 19.37 ± 4.94 min respectively with a statistically significant difference (p < 0.001) between the groups. The differences between the groups' obturation time, quality of obturation, and complications during instrumentation were not statistically significant (p > 0.05). At 24 months, the clinical success was 92.3% and 85.2% (p = 0.52) whereas the radiographic success was 65.4% and 66.7% (p = 0.78) comparing the manual and rotary groups respectively.Conclusion
Rotary instrumentation takes significantly less time than manual. There was no difference in obturation time, quality of obturation, or success rates after 24 months. 相似文献13.
Sameh Attia Joerg Wiltfang Jörn Pons-Kühnemann Jan-Falco Wilbrand Philipp Streckbein Christopher Kähling Hans-Peter Howaldt Heidrun Schaaf 《Journal of cranio-maxillo-facial surgery》2018,46(8):1205-1210
Purpose
Ablative oncological surgery to treat head-and-neck cancer often triggers a requirement for jaw reconstruction. Modern surgical procedures using free microvascular flaps afford acceptable outcomes in terms of restoration of bony and soft tissue defects. A fibula free flap is often the preferred flap, as the bone length is considerable and a two-surgeon approach is possible. Dental implants play important roles in functional rehabilitation. Our aim was to evaluate the survival of dental implants placed in reconstructed areas after transfer of fibula tissue to the jaw.Materials and methods
We retrospectively studied 34 patients who underwent ablative tumour surgery and jaw reconstruction using osteocutaneous fibula free flaps and who then received dental implants. We evaluated implant survival and success, survival of the fibula flap, and clinical and radiographic data.Results
We included 34 patients, 23 of whom were diagnosed with squamous cell carcinoma. In total, 134 dental implants were inserted in transferred fibula bone. The cumulative implant survival rate was 81%. The survival rate of the 34 fibula flaps transplanted after surgical reconstruction was 97%.Conclusion
The insertion of endosseous implants after jaw reconstruction using vascularised fibula tissue yields successful dental rehabilitation in patients with oral cancers. 相似文献14.
Marna Ribeiro Erica Hohlenwerger Fraguas Keila Ilse Cangussu Brito Yeon Jung Kim Debora Pallos Wilson Roberto Sendyk 《Journal of cranio-maxillo-facial surgery》2018,46(1):142-147
Objective
This study compared stability, removal torque, bone implant contact (BIC) and area (BA) of implants installed simultaneously with onlay autografts or allografts in rabbits' tibias.Material and methods
Total of 18 rabbits were used in this study. Fresh frozen allografts were obtained from six animals at T(-6). Two implants with autogenous grafts (Group 1) or allografts (Group 2) were simultaneously inserted into both sides of the tibiae in a vertical periimplant defect model at T0. The resonance frequency (ISQ) was measured in implant proximal epiphysis on the day of installation of T0 and T18 (18 weeks post-surgery). At T18 the removal torque was assessed at the distal implants, the implants' proximal epiphysis and surrounding bone were harvested to perform histomorphometric analysis. The BIC and BA within the limits of the implants threads were evaluated.Results
The ISQ revealed a statistically significant difference between T0 and T18 in each group (p = 0.024, p = 0.003). The removal torque indicates that there was no significant difference between the two groups (p = 0.47). No significant differences were observed between the groups regarding both BIC (p = 0.3713) and the BA (p = 0.3883).Conclusion
Both grafts and implants demonstrated the same stability, torque removal and the BIC and BA. 相似文献15.
Objective
To introduce a novel method of split-thickness labial flap in maxillary anterior ridge horizontal augmentation and to evaluate its efficacy and morbidity.Materials and methods
230 patients were selected to receive either particulate or onlay grafting. A split-thickness labial flap was applied to cover the grafted area and close the wound. The incidence of postsurgical complications and the level of patient discomfort were evaluated. A visual analog scale was used to quantify the amount of pain and swelling in the patients.Results
In all 375 surgical sites, passive primary closure was achieved with the split-thickness labial flap method. Membrane exposure after surgery was seen in 6 cases in the onlay group and in 4 in the particulate group. No long-lasting pain (>1 week), paresthesia, or signs of infection occurred during the follow-up period of 6 months. The mean pain and swelling scores in the particulate graft group (2.75 ± 3.01 and 2.02 ± 2.51, respectively) were lower than the scores in the onlay graft group (3.18 ± 2.79 and 3.85 ± 2.25, respectively).Conclusions
The flap advancement technique presented in this study facilitates clinically passive primary closure. This technique can be used successfully in both particulate and onlay horizontal graft procedures. 相似文献16.
Matthias Krause Daniel Kruber Heike Hümpfner-Hierl Ina Sterker Thomas Hierl 《Journal of cranio-maxillo-facial surgery》2018,46(1):44-49
Purpose
Surgery in endocrine orbitopathy should address exophthalmos and adjunct stigmata such as increased lid aperture and scleral show. Secondary to decompression, rehabilitative surgical treatment such as blepharoplasty is routinely used to achieve this goal. Until now, however, there has been no investigation to measure the effect of decompression surgery on scleral show and lid aperture 3-dimensionally.Materials and methods
Ocular surface area (OSA) and lid aperture of 34 patients (67 orbits) were measured pre and post decompression surgery in a retrospective investigation using 3-dimensional (3D) stereophotogrammetry. The mean follow-up after decompression was 6 ± 4 months.Results
Mean OSA ranged between 3.1 ± 1.5 cm2 (pre orbital decompression) and 2.5 ± 0.6 cm2 (post orbital decompression). Orbital decompression caused a statistically significant reduction of the surface area of about 19.4% (p < 0.001). Lid apertures showed average values between 12.7 ± 3.3 mm (pre orbital decompression) and 11.3 ± 2.2 mm (post orbital decompression). Thus orbital decompression led to a statistically significant reduction of the palpebral fissure of about 11% (p < 0.001). OSA correlated with lid aperture pre and post surgery (p < 0.001). The extent of OSA reduction showed no correlation with the amount of exophthalmos reduction.Conclusion
Our results show that surgical decompression, besides correcting exophthalmos, leads to a significant reduction of scleral show and lid aperture. However, it is not possible to estimate its effect on an individual basis. 相似文献17.
Association between third molar and mandibular angle fracture: A systematic review and meta-analysis
Francesco Giovacchini Daniele Paradiso Caterina Bensi Stefano Belli Giuseppe Lomurno Antonio Tullio 《Journal of cranio-maxillo-facial surgery》2018,46(4):558-565
Purpose
The aim of this study was to investigate the risk of mandibular angle fracture associated with the presence of a mandibular third molar and its position when the mandibular fracture occurs.Methods
A systematic literary search was performed in Pubmed, Scopus, and the Cochrane Library for observational studies with at least 250 patients that included frequency of mandibular angle fracture, presence of third molar, and its position.Results
A total of seven studies were included in the review, from an initial search of 622 titles. The relative risk of mandibular angle fracture with third molar was 1.90 (95% CI = 1.47–2.46). The relative risk of mandibular angle fracture related to third molar position (according to the Pell and Gregory classification) was 1.18 (95% CI = 0.62–2.25), 1.98 (95% CI = 0.95–4.10), 2.72 (95% CI = 1.78–4.16), 1.31 (95% CI = 0.80–2.14), 2.21 (95% CI = 1.69–2.87) and 2.99 (95% CI = 2.12–4.22) for Class A, Class B, Class C, Class I, Class II, and Class III, respectively.Conclusions
Our meta-analysis reported a two-fold increased risk of mandibular angle fracture with the presence of a third molar in patients who presented with mandibular fractures. Even the third molar position seemed to influence mandibular angle fracture, especially Class C, Class II, and Class III. 相似文献18.
Antoni Arcas Gerard Vendrell Frank Cuesta Laura Bermejo 《Journal of cranio-maxillo-facial surgery》2018,46(12):2088-2095
Purpose
To evaluate the benefits of performing mentoplasty using custom guides and plates in a series of 23 patients.Patients and methods
An 18-month observational study in 23 patients (16 women, 7 men) who underwent procedures for chin augmentation (n = 15), reduction and centering mentoplasty (n = 6), chin asymmetry correction (n = 1) and placement of a custom chin implant to correct esthetics (n = 1) was conducted in the Department of Oral and Maxillofacial Surgery of Hospital Universitario Dexeus (Barcelona, Spain).Results
A mentoplasty technique using customized surgical guides and plates, performed under local anesthesia and oral sedation, was performed in every case. Surgery times were approximately 45 min. Postoperative recovery was satisfactory in all patients. There were no intraoperative or serious postoperative complications, except for one self-limiting edema and some small hematomas of no clinical significance. Post-operative pain intensity measured by the Visual Analog Scale (VAS) was less than 3 (mild pain) in 80% and 4–7 (moderate pain) in 20% of patients.Conclusion
The results obtained in this study show that using customized surgical guides and plates in performing mentoplasty is an advantage over conventional techniques as they provide greater accuracy and safety in the surgery and more predictable results. This simplifies the procedure. 相似文献19.
Fernanda de Cássia Papaiz Gonçalves Marina Amaral Alexandre Luiz Souto Borges Luiz Fernando Martins Gonçalves Tarcisio José de Arruda Paes-Junior 《The Journal of prosthetic dentistry》2018,119(4):606-610
Statement of problem
Complete-arch implant-supported prostheses without a framework have a high risk of failure: a straightforward and inexpensive reinforcement material, such as nylon mesh, could improve their longevity.Purpose
The purpose of this in vitro study was to evaluate a nylon-silica mesh compound on the fracture strength of acrylic resin and the fracture load of complete-arch implant-supported prostheses.Material and methods
Twenty-four complete mandibular arch implant-supported prostheses were divided into 2 groups according to cantilever length (molar and premolar) and subdivided into another 2 subgroups according to the presence or absence of reinforcing mesh. The specimens were submitted to a maximum load-to-fracture test in a universal testing machine, with a 100-N load cell, a 2 mm/min crosshead speed, and a spherical metal tip diameter of 4 mm at different points (molar and premolar). These were submitted to 1-way analysis of variance for repeated measurement and the post hoc Tukey multiple comparison test (α=.05).Results
The mean maximum load ±standard deviation for the molar group was 393.4 ±95.0 N with reinforcement and 305.4 ±76.3 N without reinforcement (P=.02); and for the premolar group was 1083.3 ±283.7 N with reinforcement and 605.3 ±90.5 N without reinforcement (P=.001).Conclusions
Reinforcement with nylon mesh increased the mean maximum load of implant-supported complete-arch prostheses at both cantilever lengths. The cantilever to the premolar (5 mm) presented the highest maximum load values to fracture. 相似文献20.
Nuttaporn Parinyaprom Areerat Nirunsittirat Patchanee Chuveera Sakarat Na Lampang Tanida Srisuwan Thanapat Sastraruji Puangporn Bua-on Sophon Simprasert Issaraporn Khoipanich Thitida Sutharaphan Suthida Theppimarn Narumol Ue-srichai Waritorn Tangtrakooljaroen Papimon Chompu-inwai 《Journal of endodontics》2018,44(3):341-348