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Prediction of nerve damage by comparing periapical radiographic signs of impacted mandibular third molars in close proximity to inferior alveolar nerve with their true tomographic relationship – An observational study 通过比较靠近下牙槽神经的下颌第三磨牙的尖周x线征象及其真实断层扫描关系来预测神经损伤-一项观察性研究
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.023
Srujana Daniella Remulla, Jyothirmai Koneru, Sudhakara Reddy, R. Tatapudi, Geetanjali Darna, Naga Manikanta Mohan Prathipati
The purpose of the study was to correlate the accuracy of Roods and Shehab signs in an intraoral periapical radiograph (IOPAR) with Cone-beam computed tomography (CBCT) findings to indicate Cone-beam computed tomography only in high-risk conditions.70 impacted mandibular third molar teeth in 58 patients above 18 years with intraoral periapical radiographs presenting with one or more root and canal signs of Rood and Shehab criteria were included in the study. Winter's classification was recorded, and the patients were exposed to a Cone-beam computed tomographic scan. True canal – tooth relationship was assessed in the sectional images. Pearson Chi-square test was used to correlate periapical radiograph and tomographic findings, and an unpaired t-test was applied for descriptive analysis.Rood and Shehab canal criteria in the periapical radiographs were significantly correlated to direct contact of an impacted lower third molar with the canal (p< 0.05) and loss of cortication of Mandibular canal (p< 0.05) on the cone-beam computed tomography. Cone-beam computed tomography is recommended to assess the periapical radiographs with canal risk markers pre-operatively to help avoid iatrogenic complications.
本研究的目的是将口腔内根尖周x线片(IOPAR)中Roods和Shehab征象与锥束计算机断层扫描(CBCT)结果的准确性联系起来,以表明锥束计算机断层扫描仅在高危情况下进行。本研究纳入了58例18岁以上患者的70颗下颌第三磨牙,这些患者的口内根尖周x线片显示有一个或多个Rood和Shehab标准的根管征象。记录Winter的分类,并对患者进行锥形束计算机断层扫描。在断层图像中评估根管与牙的真实关系。使用Pearson卡方检验来关联根尖周x线片和断层扫描结果,并使用非配对t检验进行描述性分析。根尖周x线片上的Rood和Shehab根管标准与阻生下第三磨牙与根管直接接触(p< 0.05)和锥束ct上的下颌根管皮质缺失(p< 0.05)显著相关。术前建议使用锥形束计算机断层扫描评估根尖周x线片和管状危险标记,以帮助避免医源性并发症。
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引用次数: 0
Radiographic assessment of impacted mandibular third molars 下颌阻生第三磨牙的影像学评价
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.019
P. Kukreja, Fahd Nasser Al Qahtani, Ahad Fahd Al Qahtani, Modi Fahd Al Qahtani, Majedah Fahd Al Qahtani, Bakheet Atiah A Al Ghamdi
The surgical remedy of problems related to lower jaw 3 molars is related to common surgical risks like contamination, haemorrhage, pain and swelling. Certain unique risks are related with such surgery, specifically inferior alveolar and lingual nerve harm as these are adjacent vital structures. Risk assessment calls for an entire understanding of dental factors that can impact the care of these characteristic structures. Preoperative radiographic assessment warrants to provide data about the tooth itself, its encompassing bone, the neighbouring dentition, and related anatomical structural systems. Parameters that ought to be assessed are level of impaction, root formulations, angulation of the enamel, number of roots, root morphology, related pathology and, most importantly, the relation some of the crown/roots and the mandibular canal. An appropriate imaging method for 3 molars ought to display the complete 3rd molar and the mandibular canal below it. In this mini review, we elaborate on the generally used radiographic assessment methods of mandibular 3rd molars.
下颌磨牙相关问题的手术治疗与常见的手术风险有关,如污染、出血、疼痛和肿胀。某些独特的风险与这种手术有关,特别是下牙槽和舌神经损伤,因为它们是相邻的重要结构。风险评估要求全面了解可能影响这些特征结构护理的牙齿因素。术前影像学评估保证提供有关牙齿本身、其周围骨骼、邻近牙列和相关解剖结构系统的数据。应该评估的参数有嵌塞程度、牙根形态、牙釉质角度、牙根数量、牙根形态、相关病理,最重要的是,一些牙冠/牙根与下颌管的关系。一种合适的三磨牙成像方法应该显示完整的第三磨牙及其下方的下颌管。在这篇简短的综述中,我们详细介绍了常用的下颌第三磨牙的影像学评估方法。
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引用次数: 0
Amelogenesis imperfecta: A case series 无胚性发育不全:一个病例系列
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.026
Jijin M J, Thabsheera P P, Mohamed Labeeb K P, Anjana R
Amelogenesis imperfecta (AI) refers to a group of rare genetic disorders that involve tooth development and that are passed down through families as a dominant trait. This condition is characterized by abnormal enamel formation caused by gene mutations that alter the quality and/or quantity of enamel. This dental problem can impact both primary and permanent dentition, varies among affected individuals, and results in esthetic and functional problems. The treatment planning for patients with AI is related to many factors, including the age of the patient, the type and severity of the disorder, intraoral conditions, and the socioeconomic status of the patient. It is crucial to plan a proper remedy, which requires collaboration among dental specialties to execute comprehensive dental treatment in order to provide a long-term solution with adequate esthetics. This clinical case study looks at three different types of amelogenesis imperfecta patients.
无染色体发育不全症(AI)是指一组罕见的遗传性疾病,涉及牙齿发育,并作为一种显性性状在家族中遗传。这种情况的特点是由基因突变引起的牙釉质形成异常,改变了牙釉质的质量和/或数量。这种牙齿问题可以影响原牙和恒牙,因人而异,并导致美观和功能问题。AI患者的治疗计划与许多因素有关,包括患者的年龄、疾病的类型和严重程度、口腔内状况以及患者的社会经济地位。计划一个适当的补救措施是至关重要的,这需要牙科专业之间的合作,以执行全面的牙科治疗,以提供一个长期的解决方案与适当的美学。本临床病例研究着眼于三种不同类型的变性不完全性患者。
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引用次数: 1
Comparative evaluation of biting force in 2mm locking plates with 2mm miniplates in the treatment of mandible fractures: A clinical study 2mm锁定钢板与2mm微型钢板治疗下颌骨骨折咬合力的比较研究
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.025
V. Soujanya., A. Reddy, K. Kranthi, Dilip Pantham, Durga Keerthi P
1. To compare efficacy of 2mm locking plates with 2mm miniplates in the fixation of mandible fractures and 2. To evaluate and compare the biomechanical function by measuring the bite force at 1st week, 3rd week, 6th week and 3rd month postoperatively in 20 patients divided equally into two study groups.A prospective randomized study was carried out at Department of Oral and Maxillofacial Surgery, Meghna Institute of Dental Sciences, Nizamabad from 2019 to 2021 to treat consecutive mandibular fractures where patients were randomly divided into two groups each composed of 10 patients where Group A were treated with single 4 holed stainless-steel locking miniplates and Group B with two 4 holed stainless steel conventional mini plates both maintaining a gap of 2.0 mm system. Later assessment was done using bite force recording postoperatively at 1st week, 3rd week, 6th week and 3rd month and with the associated complications like Swelling, Infection, Paresthesia, Mobility between fracture fragments and Hardware failure.When the mean bite force values in right molar region of group A and group B were compared at 1st week, 3rd week, 6th week and 3rd month, there was statistically significant increase in bite force noted in group A when compared to group B at 1st week and 3rd week (P<0.05). But no statistically significant differences were observed at 6th week and 3rd month (P>0.05).When the mean bite force values in the central incisor region of group A and group B were compared at 1st week, 3rd week, 6th week and 3rd month, there was statistically significant increase in bite force noted in group A compared to group B at 1st week and 3rd week (P<0.05). But no statistically significant differences were observed at 6th week and 3rd month (P>0.05).When the mean bite force values in left molar region of group A and group B were compared at 1st week, 3rd week, 6th week and 3rd month, there was statistically significant increase in bite force noted in group A when compared group B at 3rd week (P<0.05). But no statistically significant differences were observed at 1st week, 6th week and 3rd month (P>0.05).The study signifies that both the fixation systems were able to provide stability to fracture segments, but locking plate system has provided better stability when compared to miniplates system, hence recommending for more elaborative studies to arrive at definitive conclusion.
1. 比较2mm锁定钢板与2mm微型钢板固定下颌骨骨折的疗效。将20例患者平均分为两组,分别在术后第1周、第3周、第6周和第3个月测量牙合力,评价和比较其生物力学功能。2019 - 2021年,在尼扎马巴德梅克纳牙科科学研究所口腔颌面外科进行了一项前瞻性随机研究,将患者随机分为两组,每组10例,A组使用单个4孔不锈钢锁定微型钢板治疗,B组使用两个4孔不锈钢常规微型钢板治疗,均保持2.0 mm的间隙系统。术后第1周、第3周、第6周和第3个月通过咬合力记录进行评估,并伴有相关并发症,如肿胀、感染、感觉异常、骨折碎片之间的活动和硬体失效。比较A组和B组患者第1周、第3周、第6周、第3个月右磨牙区咬合力平均值,A组患者第1周、第3周咬合力明显高于B组(P0.05)。比较A组和B组在第1周、第3周、第6周、第3个月时中切牙区咬合力的平均值,A组在第1周、第3周的咬合力明显高于B组(P0.05)。比较A组和B组在第1周、第3周、第6周、第3个月左磨牙区咬合力的平均值,A组在第3周的咬合力比B组明显增高,差异有统计学意义(P0.05)。该研究表明,两种固定系统都能够提供骨折节段的稳定性,但与微型钢板系统相比,锁定钢板系统提供了更好的稳定性,因此建议进行更详细的研究以得出明确的结论。
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引用次数: 0
The elusive retromolar foramen and retromolar canal: A CBCT study 难以捉摸的磨牙后孔和磨牙后管:一项CBCT研究
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.022
Vijeta Pannalal, Abhijeet Deoghare, Chinar Fating, Satyendra Jha
This study aims to evaluate the presence of retromolar foramen (RMF) and retromolar canal (RMC) in the mandible using cone beam computed tomography (CBCT) in Chhattishgarh population and to correlate its possible clinical impact. 175 CBCT images were collected from which 100 bilateral CBCT images of patients were retrospectively selected from the Department of Oral Medicine and Radiology of the Chhattishgarh Dental College and Research Institute and evaluated bilaterally which were taken for diagnostic purposes from maxillofacial radiology clinic and data were statistically analyzed. This was an observational descriptive study and all the images were processed and analyzed on CS3D imaging software. The data was analyzed using chi square test. The prevalence of RMF and RMC was observed in 8.5%, of which 10 were in females and 7 in males. The RMCs traversed in different directions – horizontal, vertical and angular. Based on the subjective assessment, each of these canals was further subclassified into straight and curved canal. In the present study in 12 of the cases angular curved type was found and in 3 cases, vertical straight was noticed. The bifurcation of the inferior alveolar nerve (IAN) canal was observed in 15% of the scans and remaining 85% had single mandibular canal. The proximity of RMF from buccal and lingual cortical plates was found buccally in 16 cases and in single case was found to be lingually. Position of RMF might change with the presence and absence of third molar. The absence of third molar results in anteriorly located RMF. In majority of cases it was found that RMF was located more buccal than lingual. The parameters considered in the current study will guide the oral and maxillofacial surgeons while giving incisions in 3molar impacted cases, other pathologies and ease to preserve the retromolar foramen.
本研究旨在利用锥束计算机断层扫描(CBCT)评估恰蒂斯加尔邦人群下颌磨牙后孔(RMF)和磨牙后管(RMC)的存在,并探讨其可能的临床影响。收集175张CBCT图像,其中回顾性选择恰蒂什加尔邦牙科学院口腔医学与放射科门诊用于诊断的患者双侧CBCT图像100张,对双侧CBCT图像进行评估,并对数据进行统计分析。本研究为观察性描述性研究,所有图像均在CS3D成像软件上处理分析。采用卡方检验对数据进行分析。RMF和RMC患病率为8.5%,其中女性10例,男性7例。rmc在不同的方向上移动——水平的、垂直的和角度的。在主观评价的基础上,将各根根管进一步分为直根管和弯根管。在本研究中,有12例发现角弯型,3例发现垂直直型。下牙槽神经(IAN)管分叉在15%的扫描中被观察到,剩下的85%是单一的下颌管。颊部和舌部皮质板附近的RMF在16例中发现是颊部,在1例中发现是舌部。RMF的位置可能随着第三磨牙的存在和缺失而改变。第三磨牙缺失导致前位RMF。在大多数情况下,发现RMF位于颊部多于舌部。本研究中考虑的参数将指导口腔颌面外科医生在3磨牙阻生病例、其他病理情况下进行切口时,并易于保留磨牙后孔。
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引用次数: 1
A boomy century of periodontal regeneration with biological mediators 生物介质牙周再生的繁荣世纪
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.021
D. Grover, N. Kaur, Gurpreet Kaur
With the advanced and improved knowledge of bone regeneration on the molecular level, some of key molecules that alter the complicated physiological method were identified, and are already in scientific use or beneath research to enhance bone restore. Of those molecules, BMPs were the maximum considerably studied, as they are robust osteoinductive elements. They result in the mitogenesis of mesenchymal stem cells (MSCs) and different osteoprogenitors, and their differentiation in the direction of osteoblasts. Other growth factors except BMPs which have been implicated through out the bone regeneration, with one-of-a-kind features with respect of cell proliferation, chemotaxis and angiogenesis, are also being investigated or are presently getting used to reinforce bone restore, which include platelet-derived growth factor, transforming growth factor- β, insulin-like growth factor-1, vascular endothelial growth factor and fibroblast growth factor, amongst others. One present day technique to enhance bone regeneration and soft-tissue recovery with the aid of using nearby application of growth factors is the use of platelet-rich plasma, an extent of the plasma fraction of autologous blood with platelet concentrations above baseline, that is wealthy in most of the aforementioned molecules. This overview focuses and target on the biological mediators that regulates key cellular events which have a capacity to induce the method of tissue repair and regeneration.
随着分子水平上骨再生知识的进步和提高,一些改变复杂生理方法的关键分子已被确定,并已在科学应用或正在研究中,以促进骨的恢复。在这些分子中,bmp是研究最多的,因为它们是强大的骨诱导元素。它们导致间充质干细胞(MSCs)和不同的骨祖细胞的有丝分裂,并向成骨细胞方向分化。除bmp外,其他在骨再生过程中涉及的生长因子,在细胞增殖、趋化性和血管生成方面具有独一无二的特点,目前也正在研究或用于加强骨恢复,其中包括血小板衍生生长因子、转化生长因子- β、胰岛素样生长因子-1、血管内皮生长因子和成纤维细胞生长因子等。目前一种通过使用生长因子来促进骨再生和软组织恢复的技术是使用富血小板血浆,即血小板浓度高于基线的自体血液的血浆部分,富含上述大多数分子。这篇综述的重点和目标是调节关键细胞事件的生物介质,这些事件有能力诱导组织修复和再生的方法。
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引用次数: 0
Nuclear medicine imaging in oral diseases: A review 口腔疾病的核医学影像学研究进展
Pub Date : 2021-10-15 DOI: 10.18231/j.ijmi.2021.020
K. Talreja
Nuclear medicine is the discipline of medicine that deals with the use of radionuclides in research, diagnosis, and treatment. It works on molecular & functional level and uses radiopharmaceuticals in its procedure helping in detection of lesions before morphologic change is evident. Radiopharmaceuticals also known as Radionuclides/ Radioisotopes are unstable atoms of a chemical element, actively emit radiation. These emitted radiations are absorbed by photomultiplier tube and reconstructed by a computer system followed by display of an image. The rationale of writing this article is to understand about Nuclear Medicine and its applications in oral diseases.
核医学是研究、诊断和治疗中使用放射性核素的一门医学学科。它在分子和功能水平上工作,并在其过程中使用放射性药物,帮助在形态变化明显之前检测病变。放射性药物也称为放射性核素/放射性同位素,是一种化学元素的不稳定原子,会主动发出辐射。这些发射的辐射被光电倍增管吸收,并由计算机系统重建,然后显示图像。写这篇文章的基本原理是了解核医学及其在口腔疾病中的应用。
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引用次数: 0
Soft palate morphology in OSMF patients: Radiographic evaluation OSMF患者软腭形态:影像学评价
Pub Date : 2021-07-15 DOI: 10.18231/J.IJMI.2021.014
J. Shah, Himali A Shah
Oral submucous fibrosis (OSMF) is a chronic progressive, scarring disorder of oral cavity, which includes buccal mucosa, tongue, lips, anterior faucial pillars, soft palate, and oropharynx. Changes in soft palate morphology will start even before the OSMF, present itself clinically. These changes can lead to sleep apnea, difficulty in speech, swallowing & respiration. Various radiographs are good diagnostic aid to assess the soft palate and its morphology or any changes in morphology. To evaluate and compare soft palate morphology and dimensions in various stages of OSMF with control by radiographic evaluation.: 60 patients were evaluated and compared for soft palate morphology, its length, width and angle by using lateral cephalogram and Cone beam computed tomography (CBCT). Most common type of soft palate was found to be type 1 (leaf shaped) in both groups as well as by both radiographic techniques. Significant decrease in length and increase in width with increasing grades of OSMF group. As per p value CBCT gave more precise result. As the OSMF progresses soft palate becomes stout and bulky and significant changes occur in soft palate dimensions and are better evaluated by CBCT. As involvement of the soft palate is the earliest change to be noticed, radiographs should be used as one of the diagnostic aids in OSMF patients.
口腔黏膜下纤维化(OSMF)是一种慢性进行性、瘢痕性口腔疾病,包括颊黏膜、舌、唇、前鼻梁、软腭和口咽部。软腭形态的改变甚至在OSMF出现之前就开始了,并在临床上表现出来。这些变化会导致睡眠呼吸暂停、说话困难、吞咽和呼吸困难。各种x线片是评估软腭及其形态或任何形态变化的良好诊断辅助。目的:评价和比较不同阶段OSMF患者的软腭形态和尺寸。对60例患者的软腭形态、长度、宽度和角度进行了评价和比较。最常见的软腭类型被发现是1型(叶状)在两组以及通过两种放射技术。随着OSMF组分级的增加,其长度显著减少,宽度显著增加。从p值来看,CBCT的结果更为精确。随着OSMF的发展,软腭变得粗大和笨重,软腭尺寸发生显著变化,CBCT可以更好地评估软腭。由于软腭受累是最早发现的变化,因此x线片应作为OSMF患者的诊断辅助手段之一。
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引用次数: 2
Evaluation of zygomatic bone region for placement of quad zygomatic implants using CBCT in postmenopausal women 使用CBCT评估绝经后妇女颧骨区域放置四颧植入物的效果
Pub Date : 2021-07-15 DOI: 10.18231/J.IJMI.2021.010
Neelam Manoj Vaibhav, R. Amirisetty, Rajesh Nichenametla, Gonabhavi Siri Chandana, Santhi Prathyusha M, Naresh Kumar C, B. T. Reddy
Insufficient height and width of the alveolar ridge at the implant site remains with inadequate bone volume following extraction in older age people especially in postmenopausal women. Postmenopausal women are susceptible to primary osteoporosis where more bone resorption than formation is seen resulting in decreased bone mass. Hence the present study aims to evaluate the zygomatic bone region for placement of quad zygomatic implants using CBCT.: A total of 120 CBCT images of female patients who were between the age group of 45 yrs to 65 yrs were taken. The zygomatic bone was evaluated for pneumatisation zones and thickness of zygomatic bone at three different regions i.e., superior, middle and inferior at nine points on zygoma bone along with bone to implant contact (BIC) region using virtual software. The largest thickness in the superior, middle and inferior regions were at Point A2(8.01+/-2.10 mm), Point B2 (7.01+/-1.62 mm), and Point C1 (6.65+/-1.64 mm), respectively. The virtually placed implants at Point A3 (15.92+/-4.16 mm) and Point B2 (12.02+/-3.62 mm) had the highest BICs. : To obtain the largest BICs, results suggested that the posterosuperior region (Point A3) and the centre of zygoma (Point B1) were the optimal places for the placement of quad zygomatic implants.
老年人特别是绝经后妇女拔牙后牙槽嵴高度和宽度不足,骨体积不足。绝经后妇女易患原发性骨质疏松症,骨质吸收多于形成导致骨量减少。因此,本研究旨在利用CBCT评估颧骨区域放置四头颧骨植入物。:选取年龄在45 ~ 65岁的女性患者共120张CBCT图像。利用虚拟软件对颧骨上、中、下九个点三个不同区域以及骨与种植体接触区(BIC)进行充气区和颧骨厚度的评估。A2(8.01+/-2.10 mm)、B2 (7.01+/-1.62 mm)、C1 (6.65+/-1.64 mm)为上、中、下三区最大厚度。在A3点(15.92+/-4.16 mm)和B2点(12.02+/-3.62 mm)虚拟放置种植体的BICs最高。为了获得最大的BICs,结果表明后上区(A3点)和颧骨中心(B1点)是放置四颧假体的最佳位置。
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引用次数: 0
Variations in root canal morphology of the permanent mandibular first molar in Indian population- A CBCT study 印度人群下颌第一磨牙根管形态的变化-一项CBCT研究
Pub Date : 2021-07-15 DOI: 10.18231/J.IJMI.2021.012
R. John, Vasavi Santosh, Mandavi Waghmare, Reema Manoj
The purpose of this study was to determine the variations in the number of canals and its morphology in permanent mandibular first molars using cone-beam computed tomography (CBCT) in a subset of Indian population. A total of 350 CBCT scans were collected and evaluated in all three orthogonal planes to determine the number of root canals and study their anatomic variations using Vertucci’s classification.: The total number of roots and root canals, the root canal configuration, the incidence, and the correlations between left- and right-side occurrences and between males and females were analysed. Statistically significant differences were evaluated using the chi-square test with SPSS 16.0 for Windows (SPSS, Chicago, IL), with significance set at p < 0.05.: The results of this study showed that predominantly, two thirds of the subjects had type VI mesial canal configuration and two-thirds had type I distal canal configuration. Also there was significant variance in the canal anatomy across gender and age of the subjects.: CBCT is a clinically useful tool in understanding the variations in root canal morphology, which guides in the assessment of the canal morphology aiding in successful root canal treatment.
本研究的目的是利用锥束计算机断层扫描(CBCT)在印度人群中确定永久下颌第一磨牙的管数及其形态的变化。共收集了350张CBCT扫描,并在所有三个正交平面上进行评估,以确定根管的数量,并使用Vertucci分类研究其解剖变化。分析根和根管总数、根管形态、发生率、左右侧发生率、男女发生率的相关性。采用SPSS 16.0 for Windows (SPSS, Chicago, IL)进行卡方检验,差异有统计学意义,显著性设置为p < 0.05。本研究结果显示,三分之二的受试者为VI型近端椎管构型,三分之二为I型远端椎管构型。此外,在不同性别和年龄的受试者中,椎管解剖结构也存在显著差异。CBCT是了解根管形态变化的临床有用工具,可以指导根管形态的评估,帮助根管治疗成功。
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引用次数: 2
期刊
IP International Journal of Maxillofacial Imaging
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