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Nasal Reconstruction due to Basal-Cell Carcinoma using Dental Implants: A Case Report 基底细胞癌鼻重建植牙1例报告
IF 0.5
Dental Hypotheses Pub Date : 2022-01-01 DOI: 10.4103/denthyp.denthyp_168_21
A. Haghighat, H. Momeni, Farzad Yeganeh, Yamin Haghani, A. Nazarifar
{"title":"Nasal Reconstruction due to Basal-Cell Carcinoma using Dental Implants: A Case Report","authors":"A. Haghighat, H. Momeni, Farzad Yeganeh, Yamin Haghani, A. Nazarifar","doi":"10.4103/denthyp.denthyp_168_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_168_21","url":null,"abstract":"Facial defects affect a patient’s quality of life in different aspects of psychologic health, social contacts, and functional abilities. Our report describes a 65-year-old patient who was undergone rhinectomy surgery due to nasal basal-cell carcinoma. We considered to rehabilitate the nose using two dental implants and a reversed triangle abutment to gain the best retention results for the final nasal prosthetic. The implant-supported prosthetics does not need surgery on the patient for graft, tissue transfer, or such procedures. It can effectively restore the nose in a satisfactory esthetic manner.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"24 - 26"},"PeriodicalIF":0.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43831426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Monowave and Polywave LED Unites on G-Aenial Resin Composites’ Polymerization: An In Vitro Study 单波和多波LED单元对G-Aenial树脂复合材料聚合的影响：体外研究
IF 0.5
Dental Hypotheses Pub Date : 2022-01-01 DOI: 10.4103/denthyp.denthyp_156_21
Azadeh Ghaemi, Milad Molayi, Rayan Chaharmahali
{"title":"Influence of Monowave and Polywave LED Unites on G-Aenial Resin Composites’ Polymerization: An In Vitro Study","authors":"Azadeh Ghaemi, Milad Molayi, Rayan Chaharmahali","doi":"10.4103/denthyp.denthyp_156_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_156_21","url":null,"abstract":"Objectives: Trimethylbenzoyldiphenylphosphine oxide and phenylpropanedione photoinitiator components in resin composites have been used widely due to their white color. However, it seems that there are some limitations in the required polymerization initiator wavelength. This study aimed to evaluate the polywave and monowave light-activating devices (LEDs) on polymerization and shrinkage strain of two dental composites with different photoinitiator systems. Methods: In this experimental study, 24 samples were prepared in two groups, including G-Aenial A2 and bleach composites. Each group was divided into two subgroups: one cured by monowave LED unit and the other by polywave device. Then shrinkage strain of samples was evaluated using bonded disk technique. Results: Results showed the shrinkage strain of A2 and bleach composites using PW device was significantly greater than MW device. In addition, the A2 composite shrinkage action polymerized with MW device was significantly lower than shrinkage action of A2 and bleach composite using PW machine. Conclusion: The findings of this study revealed that polywave LEDs were more beneficial for the polymerization of resin composites.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"16 - 19"},"PeriodicalIF":0.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49546957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Application of Sonic Vibration on the Bond Strength of Glass Fiber Post to Root Dentin using Duo-link and Theracem cements: An In Vitro Study 应用声波振动对Duo-link和Theracem固位剂玻璃纤维桩与根面结合强度的影响：体外研究
IF 0.5
Dental Hypotheses Pub Date : 2022-01-01 DOI: 10.4103/denthyp.denthyp_122_21
M. Hoseini, M. Malekipour, F. Shirani
{"title":"The Effect of Application of Sonic Vibration on the Bond Strength of Glass Fiber Post to Root Dentin using Duo-link and Theracem cements: An In Vitro Study","authors":"M. Hoseini, M. Malekipour, F. Shirani","doi":"10.4103/denthyp.denthyp_122_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_122_21","url":null,"abstract":"Background: This study investigated the impact of sonic vibration on the root dentin-glass fiber post bond strength using two resin cements. Materials and methods: Forty single-canal teeth were randomly divided into four groups (n = 10): Theracem self-adhesive using sonic vibration, Duo-link cement using sonic vibration and abrasion, Theracem self-adhesive, and Duo-link cement. Data were analyzed by one-way analysis of variance, Tukey test, and independent t test (α = 0.05). Results: In the coronal region, the bond strength was not significantly different among the four groups (P = 0.331). In the apical region, the bond strength was significantly higher in the Duo-link cement using sonic vibration than in the Theracem cement using sonic vibration (P = 0.010) and Theracem cement using the conventional method (P = 0.007). Conclusion: Sonic vibration has positively affects the push-out bond strength of glass fiber post to root dentin using Duo-link cement.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"10 - 15"},"PeriodicalIF":0.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48974768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hard- and Soft-Tissue Cephalometric Landmark Detection when Using a Thyroid Lead Shield 使用甲状腺铅屏蔽时的硬组织和软组织头影测量标志检测
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_110_21
F. Gorjizadeh, R. Panahi, Milad Masoumi
{"title":"Hard- and Soft-Tissue Cephalometric Landmark Detection when Using a Thyroid Lead Shield","authors":"F. Gorjizadeh, R. Panahi, Milad Masoumi","doi":"10.4103/denthyp.denthyp_110_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_110_21","url":null,"abstract":"Introduction: The aim of this study was to assess the detection of some hard- and soft-tissue cephalometric landmarks when using a thyroid lead shield. Materials and Methods: Two study groups were designed, and each group consisted of 50 cephalograms: the first group was without thyroid shield cephalograms and the second group consisted of cephalograms taken using a lead thyroid shield. An observer blinded about the aim of the study was appointed to identify 12 landmarks on the lateral cephalograms. Results: Out of 12 of landmarks, 3 landmarks had a significant relationship with the thyroid shield group. Landmarks of cervical point, second and third vertebrae were not detected in 20%, 30%, and 66% of cases, respectively. Discussion: Two hard-tissue landmarks (second and third vertebrae) and one soft-tissue landmark (cervical point) were masked by the thyroid shield when preparing a cephalogram.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"193 - 196"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48840913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Effect of 660-nm Low Level Laser Therapy on Mandibular Lateral Movement After Orthognathic Surgery: A Randomized Phase 1 Trial 660nm低水平激光治疗对正颌手术后下颌侧移的影响：一项随机1期试验
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_39_21
Farnaz Noshirvani, H. Momeni, Alireza Sadighi
{"title":"The Effect of 660-nm Low Level Laser Therapy on Mandibular Lateral Movement After Orthognathic Surgery: A Randomized Phase 1 Trial","authors":"Farnaz Noshirvani, H. Momeni, Alireza Sadighi","doi":"10.4103/denthyp.denthyp_39_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_39_21","url":null,"abstract":"Introduction: Limited jaw motion is a common complication after orthognathic surgeries that can negatively affect the patients’ quality of life, thus it is required to be properly treated. Regarding the growing interests in laser application in density, we aimed to evaluate the effects of 660nm LLLT on mandibular lateral movements after orthognathic surgery. Materials and Methods: Twelve candidates of bimaxillary orthognathic surgery were included in a split-mouth, triple-blind phase 1 trial. On 1, 4, and 7 days after the surgery, a 660-nm diode low-level laser was applied to one facial side of patients, whereas the other side was kept untreated as placebo. Then, rightward and leftward mandibular movements from the maxillary midline were measured in millimeters (mm) on 2, 7, and 14 after the surgery. The measurements were then compared between the study groups using ANCOVA analysis. Results: Despite the constant improvement in mandibular lateral movements in both study groups, the rightward mandibular movements in LLLT group were significantly better than in placebo group on second (3.9 versus 3.2 mm, P = 0.015), seventh (5.6 versus 4.2 mm, P = 0.018), and 14th (7.1 versus 5.2 mm, P = 0.005) days after the surgery. Also, the leftward mandibular movements in LLLT group were significantly better than in placebo group on second (3.7 versus 2.1 mm, P = 0.021), seventh (4.9 versus 2.9 mm, P = 0.019), and 14th (6.7 versus 4.2 mm, P = 0.002) days after the surgery. Conclusion: LLLT can effectively improve both rightward and leftward movements of mandibular after an orthognathic surgery.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"179 - 184"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48125685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of Pigmented Lesions that Appear in the Mouth of Smokers and Passive Smokers 吸烟者和被动吸烟者口腔色素病变的比较
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_54_21
R. Hamid, S. Ali, Lara Hussein
{"title":"Comparison of Pigmented Lesions that Appear in the Mouth of Smokers and Passive Smokers","authors":"R. Hamid, S. Ali, Lara Hussein","doi":"10.4103/denthyp.denthyp_54_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_54_21","url":null,"abstract":"Introduction: Passive smoker individuals whom live near the smokers and pigmentation appears on their oral mucosa due to proximity from smokers. Materials and methods: This study was carried-out on 50 patients suffering from pigmentation of the mouth that were collected from the private dental clinic were obtained and 50 individual’s neighbouring to them and considered as the passive smoking group. Discussion: For passive smoker the pigmentation increasing with duration of smoking, in non-filtered cigarettes than filtered cigarette and in heavy smokers than mild smokers The intraoral distribution of melanin pigmentations commonly observed in the buccal region, Lingual, gingival and palatal of the mouth.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"197 - 201"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46082550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of the Resin-Based Adhesive Coating on the Shear Punch Strength of Aesthetic Restorative Materials 树脂基胶粘剂涂层对美学修复材料剪切冲击强度的影响
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_106_21
N. Mohammadi, R. Bagheri, L. Borazjani
{"title":"Effect of the Resin-Based Adhesive Coating on the Shear Punch Strength of Aesthetic Restorative Materials","authors":"N. Mohammadi, R. Bagheri, L. Borazjani","doi":"10.4103/denthyp.denthyp_106_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_106_21","url":null,"abstract":"Introduction: This study aimed to investigate the effect of G-Coat Plus (GCP) on the shear punch strength (SPS) of conventional glass ionomer cements (CGICs) and resin composites (RCs). Materials and methods: In this experimental study, four groups of restorative materials (two CGICs (Equia Forte Fil and Fuji Bulk), and two RCs (Aura Bulk fil and Filtek Z250) were used. Twenty specimens were prepared for each material. GCP was applied on the first subgroup (n = 10). The specimens were stored in distilled water at 37°C, and SPS values were measured after 24 hours. Two-way analysis of variance and independent t test were used for data analysis. Results: RCs showed significant higher SPS values compared to the CGICs (P < 0.001). All materials tested showed increased SPS values after applying GCP (P < 0.05). Conclusion: Applying GCP significantly improves the SPS of tooth-colored restorative materials used in this study.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"189 - 192"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42498916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Infection of Porphyromonas gingivalis in Alzheimer’s Disease and the Suppression of Immunity 阿尔茨海默病患者牙龈卟啉单胞菌感染及免疫抑制
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_38_21
C. Putri, E. Bachtiar
{"title":"Infection of Porphyromonas gingivalis in Alzheimer’s Disease and the Suppression of Immunity","authors":"C. Putri, E. Bachtiar","doi":"10.4103/denthyp.denthyp_38_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_38_21","url":null,"abstract":"Alzheimer disease is one of the most frequent neurodegenerative diseases. Porphyromonas gingivalis is the key pathogen of chronic periodontitis, and it has a virulence factor known as gingipain. Gingipain is a proteolytic enzyme capable of penetrating the blood–brain barrier to reach the brain’s center of cognition. Gingipain that reaches the brain is suspected of having a relationship with an amyloid-beta plaque and neurofibrillary tangle, which play a critical role in the formation of Alzheimer disease. These bacteria may also suppress the immune system by reducing cytokine tumor growth factor (TGF-beta) and Interferon (IFN-gamma) and imbalance of Th17/Treg (Regulatory T cells). Besides that, the involvement of P. gingivalis in the brain may trigger neuroinflammation and lead to neuron defect and worsen Alzheimer disease. This review aims to discuss the correlation between P. gingivalis and the development of Alzheimer disease.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"174 - 178"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45238877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Blinding Assessment: One Step Forward. 盲法评估:向前迈进一步。
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 Epub Date: 2021-12-21 DOI: 10.4103/denthyp.denthyp_99_21
Jeehyoung Kim, Jongbae J Park, Heejung Bang, Jafar Kolahi
{"title":"Blinding Assessment: One Step Forward.","authors":"Jeehyoung Kim,&nbsp;Jongbae J Park,&nbsp;Heejung Bang,&nbsp;Jafar Kolahi","doi":"10.4103/denthyp.denthyp_99_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_99_21","url":null,"abstract":"","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 4","pages":"169-173"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8754420/pdf/nihms-1766418.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39696217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Effect of Payment Methods on Dental Service Mix: An Economic Retrospective Cohort Study 支付方式对牙科服务组合的影响：一项经济回顾性队列研究
IF 0.5
Dental Hypotheses Pub Date : 2021-10-01 DOI: 10.4103/denthyp.denthyp_101_21
Reza Emrani, K. Sargeran, H. Hessari
{"title":"The Effect of Payment Methods on Dental Service Mix: An Economic Retrospective Cohort Study","authors":"Reza Emrani, K. Sargeran, H. Hessari","doi":"10.4103/denthyp.denthyp_101_21","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_101_21","url":null,"abstract":"Introduction: The number of dental services provided is related to the type of services needed by a population and treatment decision making by dentists. This descriptive study aimed to compare the dental service mix in two different payment systems. Methods: The dental records of a long-established dental clinic were reviewed. Treatment performed, during October 2018 and October 2019, by 36 dentists, 12 dentists worked in both payment method periods, 12 of them worked only in salary, and 12 of them worked in fee for service (FFS) period. Results: Preventive dental services and practices without treatment (visits, diagnostic radiography, and referrals) decreased, and practices included aggressive treatments (randomized controlled trial, extraction, and crown) and highly aggressive procedure (surgery) increased from salary to FFS period. The total activities of dentists were higher in FFS. Conclusion: According to our results, in a salary system, the dentist was more likely to refer and perform preventive treatments, whereas in the FFS payment system, the dentists choose more aggressive treatments. Payment method may change dental service mix.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"12 1","pages":"185 - 188"},"PeriodicalIF":0.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49590567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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