Eruption Pattern Research Articles

Analysis of Volcanic Development Model and Main Controlling Factors of Oil Distribution in the Third Member of Shahejie Formation in Zaoyuan Oilfield

In order to clarify the influence in the volcanic mode and structure on the oil reservoirs, the volcanic reservoir characteristics, volcanic eruption pattern, and volcanic eruption period of the third member of the Shahejie formation in the Dagang Oilfield Zao35 fault block are studied by combining logging, 3D seismic, and production data, and to provide geological basis for the subsequent development of volcanic reservoirs. The results show that the volcanic body of the Zao35 fault block is jointly controlled by the fissure-centered eruption mode, and there are three strings of bead-shaped eruption centers as well as a fault overflow channel. Based on the seismic response characteristics, the volcanic rocks can be divided into three main eruption cycles. Moreover, combined with the relatively stable mudstone interlayer encountered by the single well, it can be further divided into eight volcanic eruption periods. There are three different lava units in the overflow facies of each stage, namely thick layer dense basalt, basalt with pores developed at the top and dense at the bottom, and basalt with pores developed at the top and dense in the middle. Influenced by the volcanic development model, the oil is mainly distributed in the volcanic reservoir on the slope belt between the central eruption and the fracture eruption. Affected by volcanic eruption periods, the pore basalt at the top and bottom of each period controls the distribution of the oil reserves. Therefore, the thick layer stomatal basalt located between the two eruption modes is the key target of the next development.

Angular and positional changes of the maxillary third molars after orthodontic treatment with different premolar extraction patterns.

To evaluate the angular and positional changes of the maxillary second (M2) and third molars (M3) after orthodontic premolar extraction treatment according to patient skeletal classification and growth pattern. Panoramic radiographs of patients treated with extraction of the first or second premolars (n = 116) and patients treated without extraction (n = 92), taken before orthodontic treatment (T0) and after completion of multibracket appliance therapy (T1) were analyzed. Angle classification, growth pattern, crowding, and incisor inclination were recorded. The palatal (PP) and interorbital planes (IOP) were used as reference lines. Changes in the M3 angulation relative to PP and IOP (T0-T1) within the same group were evaluated with paired t-tests. One-way analysis of variance (ANOVA) and Kruskal-Wallis tests were used for comparisons between the groups. Accordingly, pairwise comparisons were performed with Mann-Whitney U-tests or independent t-tests (P < .05). The M3 angulation related to the PP and the IOP did not differ significantly between the extraction and nonextraction groups. The M2 angulation improved in the premolar extraction group between T0 and T1 (M2/PP, P < .001). According to Archer's classification, the change in the vertical position of M3 differed significantly between the extraction and nonextraction groups (P < .001). The angulation of M3 improved over time regardless of the extraction decision. The vertical eruption pattern of M3 was positively influenced only in the extraction group. M2 became significantly more upright in the orthodontic extraction treatment groups.

Prevalence of Dental Anomalies in Taiwanese Children with Cleft Lip and Cleft Palate

The aim of this study was to investigate the prevalence of tooth agenesis, tooth malformation, and eruption patterns of upper canines/first premolars in Taiwanese children. A total of 132 cleft lip and cleft palate (CLCP) patients (82 boys and 50 girls) underwent alveolar bone grafting (ABG) between 2012 and 2022. The patients’ dental records and X-ray images were inspected. We examined dental anomalies, including congenital missing teeth, microdontia, and transposition from the upper canines to the upper first premolars in these CLCP patients. Additionally, we investigated the mean ABG operation age (9.27 ± 0.76 years) of our patient; 40.9% of them received pre-ABG orthodontic treatment at 8.72 ± 0.70 years. Among the 132 cleft subjects, the prevalence of tooth agenesis is 73.5% (97/132). The most frequently missing teeth are the maxillary lateral incisors (right side: 46.2%; left side: 47.0%). In this study, microdontia are found in all the upper incisors, of which the highest percentage (18.9%) is observed in the upper left lateral incisors. The prevalence of upper canine and first premolar transposition is 10.6%. The pattern of tooth agenesis and microdontia of the upper lateral incisors shows a strong correlation with the cleft sites of these CLCP patients in our study. These results may support the idea that the patterns of dental anomalies in CLCP patients are region-specific.

Compound odontomas – A roadblock to tooth eruption and shedding: A case series

The most prevalent type of odontogenic tumours are odontomas, which are typically asymptomatic. This study describes three cases of compound odontomas identified in children as a result of dislodgement or over-retention of primary anterior teeth and/or swelling of the cortical bone. In each of these situations, the lesions were surgically excised. The outcomes obtained show that an early detection of odontomas enables the use of a less expensive and complex treatment and ensures a better prognosis. This article provides in-depth information on the categorization, prevalence, diagnosis, treatment, and epidemiology of odontomas, which interfere with the patterns of tooth eruption and shedding as well as overall occlusion.

Late Holocene Tephrostratigraphy at Chokai Volcano, Northern Japan, and Contribution to Hazard Assessment

History and pattern of explosive eruptions at Chokai volcano, Japan, in the last 2500 years were investigated from tephra survey and accelerator mass spectrometry (AMS) radiocarbon dating. The tephrostratigraphy was established based on observations at eight hand-dug trenches and three outcrops. The well-correlated tephra layers were dated at c. 2.5 ka, 2.1–1.9 ka, 1.8 ka, and 1.6 ka, indicating major eruptions occurred at these ages. The tephra from the documented 871 CE eruption was also identified. Componentry analysis of ash was carried out for these five eruption deposits. The changes in tephra facies and ash components within an unbroken series of tephra layers indicate a shift from hydrothermal-dominant phreatic or phreatomagmatic eruption to magma-dominant eruptions in a single episode. Common eruption sequences were identified based on the combination of tephra facies variation and records of witnessed eruptions. Every volcanic activity begins with precursory activity of seismicity, fumaroles, and snow melting for weeks to months, then onset hydrothermal-dominant eruption happens. Then, the eruption evolves to a magma-dominant eruption, or alternatively, the hydrothermal-dominant eruption persistently continues until cessation. The eruption sizes are VEI 2 or more minor. Lahar can occur at any stage of the eruption, resulting in damage to the residential area at the base of the volcano. The eruption patterns and the extent of hazard risks elucidated by this study will be utilized to hazard mitigation plans.

Eruption Pattern of Permanent Canines and Premolars in Polish Children.

Eruption is a complex and dynamic process determined by both genetic and epigenetic factors. This process involves a number of changes in the tissues surrounding the tooth and in tooth morphology. The aim of this study was to analyze the eruption sequence of permanent canines and premolars on the basis of pantomographic images. The study material consisted of 300 digital pantomographic images of children in the developmental period. The study group consisted of 165 boys and 135 girls. Images of patients of Polish nationality, aged 6–10 years, without diagnosed systemic diseases and local disorders were used in the study. Results: The study has shown that the most common pattern of tooth eruption in the lateral zones is type A positioning of the lateral teeth, which is 4-5-3. This pattern is characteristic of both girls and boys. This pattern also occurs most frequently in the maxilla in both boys and girls. In the mandible, on the contrary, two patterns of lateral tooth eruption were predominant. In girls, types A and E/4-5-3 and 3-4-5/occurred in the mandible, while in boys, types A and C/4-5-3 and 5-4-3/were observed in the mandible. The process of tooth eruption is a recognized measure of a child’s physical development, and pantomographic images are an effective and common diagnostic tool.

Parathyroid hormone-related protein and primary teeth eruption in stunting children

Stunting is a linear growth failure as an indicator of malnutrition status which is identified by comparing the height of children with normal height according to the same age and sex. Children are categorized as stunting if the child`s height is shorter than the average height of the same age and sex and has a standard deviation of below minus 2 according to the standard who. The cause of stunting is multifactorial, including disruption of hormone function, one of which is a parathyroid hormone. Parathyroid Hormone-related Protein (PTHrP) plays a role in the tooth-eruption process. This literature review aims to study the role of PTHrP on the eruption rate of primary teeth in stunting children. Malfunction of the parathyroid glands in stunted children can cause a deficiency of PTHrP levels. PTHrP and vitamin D play a role in the maintenance and affect calcium levels. Deficiency levels of PTHrP and vitamin d can lead to decreased absorption of calcium in the blood. Calcium deficiency in children can cause osteoclasts and osteoblasts to decrease, which can affect bone growth and tooth eruption patterns. In stunting children, the level of PTHrP will decrease so that tooth eruption will be inhibited.

Eruption pattern of the maxillary canines: features indicating treatment needs as seen in PTG at the late mixed stage—Part II

AimTo describe features of maxillary permanent canines in the late mixed stage as seen in panoramic radiograph (PTG) that later needed treatment to erupt into the oral cavity and to compare them with naturally erupted canines.MethodsThe cross-sectional part of this retrospective register-based study consisted of 1454 PTGs of children (mean age 9.3 years) living in Eastern Finland, while the longitudinal part involved patient data on 184 treated maxillary canines. The variables examined were treatment needs, overlapping and inclination of the maxillary canines, the development stage of the canines and lateral incisors and dental age.ResultsOnly 11.6% of the maxillary canines needed treatment, including interceptive procedures. The treated canines significantly more often had overlapping (p < 0.001), larger inclination (p = 0.001) and incomplete lateral incisors (p = 0.002) than did the naturally erupted canines. The children treated significantly more often had a delayed dental age (p = 0.035). Clear overlapping was closely associated with all treatment modalities, whereas some overlapping and a large inclination angle (≥ 25°) were associated especially in cases of late treatment. An incomplete lateral incisor and delayed dental age were associated with treatment.ConclusionAn association with treatment needs was found especially in the case of overlapping and a large inclination angle of the maxillary canine a couple of years before eruption into the oral cavity. These features can be early signs and indications for instant or later treatment of a maxillary canine and underline the importance of monitoring space conditions and erupting canines.

Mechanism of ionized calcium (iCa) in odontogenesis stunting children: Review article including a new theory for future studies on eruption rate in stunting children

Introduction: The normal development of the craniofacial complex can be predicted by the eruption rate. Delayed eruption is a condition that is associated with stunting. Stunting is caused by a decrease in extracellular serum iCa levels due to Environmental Enteric Dysfunction (EED), inadequate nutrition, and hormonal dysfunction. Calcium is 99 % of hydroxyapatite's composition. Dental Pulp Cells stem cell (DPCs), osteoblasts, and osteoclasts are all highly affected by extracellular calcium (iCa) levels, because there was calcium channels and receptors are found in their membranic. The aim of the review is to discuss how iCa influences the odontogenic process and the eruption pattern in stunting children. Methodology: Literature review and theoretical approach using data from Sci-Direct, GoogleScholar, and PubMed, which have been extracted using the PRISMA technique for articles based on keywords. Result: The procedure of searching for data using an online data base resulting obtained a total of 295 articles found from 2002–2022. At the feasibility stage, 295 articles have been screened and reviewed according to the exclusion and inclusion criteria, which are related to the keyword study of the literature in the search strategy. 26 articles were finally chosen to be analyzed. Conclussion: iCa influences odontogenesis and eruption processes in Stunting Children. Serum iCa decreased in stunting children.

Third Molar Impactions Prevalence and Pattern Among Adults Using 5923 Digital Orthopantomogram

Background: Third molars positions and eruption patterns tend to be unpredictable in most cases. Substantial diversity exists globally among modern human races in the prevalence of third molar impaction. Aims and Method: This study aimed to investigate the prevalence and pattern of third molar impaction amongBangladeshi adults. Digital panoramic radiographs of 5923 patientswith the mean age of 35.90 ± 10.76 years olds were retrieved from database and evaluatedusingPlanmecaRomexis software.Demographics, gender and sidedifferences wereanalysed using SPSSversion 26.0. Result:Approximately, 46.2% of the adult population had third molar impaction where significant impaction occurred in the mandible compared to maxillary arch. However, no significant differences were observed among gender and side distribution. The most common type of third molar angulation in the maxilla and mandible was distoangular (55.9%) and mesioangular (36.6%), respectively.Comprehension of demographic and morphological variations in third molar impaction will lead to an understanding of third molar impaction assessment, which will aid in understanding the evolutionary origins of an important condition adversely affecting modern peoples. Bangladesh Journal of Medical Science Vol. 21 No. 03 July’22 Page: 717-729

Types and Eruption Patterns of the Carboniferous Volcanic Edifices in the Shixi Area, Junggar Basin

The types of volcanic edifices and volcanic eruption patterns control the accumulation and distribution of oil and gas. By means of drillings, seismic data, and geochemical analysis, the types and distribution of the Carboniferous volcanic edifices in the Shixi area of Junggar Basin were studied, the formation mechanism of magma was clarified, and the eruption patterns of volcanoes were investigated. The results show that the types of the Carboniferous volcanic edifices in the Shixi area mainly include stratovolcanic edifices, shield basic volcanic edifices, and mound superimposed volcanic edifices. Stratovolcanic edifices and mound superimposed volcanic edifices are developed around the Shixi fault, while single stratovolcanic edifices are developed around the Mobei fault. Shield basic volcanic edifices are only developed in the south of the Shixi area. Vertically, volcanic edifices are mainly developed on the hanging walls of the faults. When the faults develop, the volcanic vents are dendritic, forming mound superimposed volcanic edifices in space. On the plane, there are more volcanic edifices in the Shixi salient than in the Mobei salient. Intermediate-acid volcanic edifices are distributed in beaded shapes along one side of the Shixi fault and the Mobei fault, while basic volcanic edifices are distributed in sheet shapes on both sides of the Dinan fault. In the early Carboniferous, the Shixi area was in the island arc environment under the subduction of the oceanic crust. The basic magma came from the melting of the subduction plate, and the intermediate-acid magma came from the partial melting of the crust. In the late Carboniferous, the extensional environment formed by the retraction of the subduction plate led to the formation of large-scale volcanic eruptions. The extensional environment formed by the retreat of the subduction plate in the later stage resulted in large-scale volcanic eruptions.

Polymorphic light eruption

Introduction: Polymorphic light eruption (PLE) is the most common photodermatoses encountered in clinical practice. It is an idiopathic acquired disorder in which a delayed response to Ultraviolet radiation occurs in the form of skin eruptions consisting of papules, vesicles or plaques over the sun exposed and rarely on partially covered areas, distribution is generally symmetrical. Diagnosis is clinical and histo-pathological features vary according to age of lesions sampled. Objective: To study clinical pattern of Polymorphic Light Eruption and Histo-Pathological Correlation Methods: The present study is a hospital based observational study, conducted over a period of one year. A total of 70 cases including male and female patients presenting with history of photosensitivity or with clinical manifestations related to photosensitivity were enrolled. All patients underwent clinical and systemic examination followed by routine and histo-pathological investigations. The findings were recorded in proforma for analysis and interpretation of data. Follow-up was done to know the prognosis of the patients. Results: The study shows that females are more affected than males with a ratio of 1:2.33 and the maximum incidence in the age group of 11-20 years and minimum in the age group of 51-60 years.

Retention of Central Incisors Caused by Four Supernumerary, Molariform Teeth in A Non-Syndromic Patient

The presence of supernumerary teeth is one of the most common factors that can alter the normal eruption pattern. We present here a rare phenomenon of four, molariform mesiodentes in a systemically healthy, non-syndromic patient, with non-contributory family history, causing delayed eruption of permanent, upper, central incisors. Multiple supernumerary teeth can be an important component of distinctive disorders and a valuable clue for their early diagnosis. However, this case highlights the importance of non-hereditary factors in the pathogenesis of multiple supernumerary teeth in a non-syndromic patient.

Revision of platypterygiine rostral material from the Northern Apennines (Italy): New insights on distal neurovascular anatomy and tooth replacement in Cretaceous ichthyosaurs

In 2016 a new Cretaceous ichthyosaur rostrum fragment (IG 251372) was found near Gombola, Modena Province, northern Italy. Two rostral fragments and a partial humerus were previously reported from the same locality. Despite their fragmentary nature, all these finds are relatively well preserved, with just slightly deformed shape and teeth still in place. Here we describe IG 251372, relying on CT-scan technology to allow visualization of the fossil internal structure. The new specimen has been ascribed to the sub-family Platypterygiinae based on the sub-rectangular profile of the tooth roots. Tooth crowns are robust and show a similar density of enamel ridges to many other Cretaceous ichthyosaurs historically referred to the genus Platypterygius. A detailed taphonomical analysis was performed on the material from Gombola. The ichthyosaurs previously ascribed to Platypterygius are now identified only to the subfamily level. CT-scans revealed an anterior neurovascular network within both the premaxilla and the dentary, here interpreted as mandibular and maxillary/ophthalmic divisions of the trigeminal nerve. Axial sections and videos show how these intraosseous channels emerge within the dental and premaxillary fossae. Cross section imaging of tooth roots showed an alternating pattern of tooth resorption and eruption, providing additional information on dental replacement in ichthyosaurs. IG 251372 has been attributed to the Albian-Cenomanian by means of nannofossils contained within the matrix, making it the first ichthyosaur from the Northern Apennines to be directly dated.

Causes of lower premolar impaction in pediatric patients. Case series.

Impacted teeth are frequently observed in clinical practice. However, the presence of impacted premolars is a rarely reported dental anomaly. It is known of a genetic relationship between the presence of several dental anomalies in the same patient as well as in the same family. Among the anomalies associated with lower premolar impactions are palatal impacted cuspids and upper lateral incisors with alteration in shape or number. This investigation aimed to describe the causes associated with lower premolar impaction through a series of 6 cases, between 11 and 15 years of age. The results found suggest the causes associated with the impaction of lower premolars were prolonged retention of primary teeth, altered eruptive pattern, presence of supernumeraries, premature loss of primary teeth and delayed eruption associated with hormonal factors. It is concluded that the presence of premolar impaction points to an association of several causes that converge, observing not only one but several dental anomalies.

Downward-propagating eruption following vent unloading implies no direct magmatic trigger for the 2018 lateral collapse of Anak Krakatau

The lateral collapse of Anak Krakatau volcano, Indonesia, in December 2018 highlighted the potentially devastating impacts of volcanic edifice instability. Nonetheless, the trigger for the Anak Krakatau collapse remains obscure. The volcano had been erupting for the previous six months, and although failure was followed by intense explosive activity, it is the period immediately prior to collapse that is potentially key in providing identifiable, pre-collapse warning signals. Here, we integrate physical, microtextural and geochemical characterisation of tephra deposits spanning the collapse period. We demonstrate that the first post-collapse eruptive phase (erupting juvenile clasts with a low microlite areal number density and relatively large microlites, reflecting a crystal-growth dominated regime) is best explained by instantaneous unloading of a relatively stagnant upper conduit. This was followed by the second post-collapse phase, on a timescale of hours, which tapped successively hotter and deeper magma batches, reflected in increasing plagioclase anorthite content and more mafic glass compositions, alongside higher calculated ascent velocities and decompression rates. The characteristics of the post-collapse products imply downward propagating destabilisation of the magma storage system as a response to collapse, rather than pre-collapse magma ascent triggering failure. Importantly, this suggests that the collapse was a consequence of longer-term processes linked to edifice growth and instability, and that no indicative changes in the magmatic system could have signalled the potential for incipient failure. Therefore, monitoring efforts may need to focus on integrating short- and long-term edifice growth and deformation patterns to identify increased susceptibility to lateral collapse. The post-collapse eruptive pattern also suggests a magma pressurisation regime that is highly sensitive to surface-driven perturbations, which led to elevated magma fluxes after the collapse and rapid edifice regrowth. Not only does rapid regrowth potentially obscure evidence of past collapses, but it also emphasises the finely balanced relationship between edifice loading and crustal magma storage.

Age estimation using third molar maturation based on Demirjian's criteria.

Dental age estimation is routinely used in human identification, in both the living and the dead. Teeth follow a predictable pattern of eruption and maturation that can be assessed radiographically in the living, allowing experts to estimate an individual's age. Third molars develop much later than the other permanent teeth, and can be used to estimate age of individuals nearing the age of maturity. Ability of third molar maturation when graded using Demirjian's method in ascertaining whether an individual has attained the medicolegal ages of 16 and 18years has not yet been verified. The present study involved assessing the third molar maturation of 220 individuals of a training set using Demirjian's scoring system, generating regression models to estimate age using the third molar maturity scores, applying these models on a test set of 40 individuals, and calculating the mean difference (MD) and the mean absolute error (MAE) between the chronological and estimated ages of the test set participants. It was observed that the lowest mean difference and mean absolute error was observed for the maturation of the left mandibular third molar (MD=1.05years, MAE=2.09years). Boxplots generated in the study report that the third molar maturation stages given by Demirjian can identify whether an individual has attained the medicolegally significant ages of 16 and 18years of age.

Ramsay hunt syndrome- expect the unexpected: A case report

Herpes zoster represents a latent reactivation of the varicella zoster virus infection with a dermatomal pattern of eruption and complicated by post-herpetic neuralgia. Ramsay hunt syndrome is a rare complication of herpes zoster and it is not just a syndrome but it's rather an infectious disease. This syndrome is characterized by peripheral facial nerve palsy associated with an erythematous vesicular rash on the ear. It is characterized by unilateral pattern of facial involvement and presence of vesicles helps in early diagnosis and distinguish the syndrome with diseases mimicking other severe neurological diseases. This article reports a case of 56-year-old male patient who reported with a complaint of severe toothache, which serves as severe prodrome for reactivation of herpes zoster virus which later leads to Ramsay Hunt syndrome. This case report highlights about the management of herpes zoster and its complication and emphasizes on prevention of post herpetic neuralgia complication.

Temporal Evolution of Inflammation and Neurodegeneration With Alpha-Synuclein Propagation in Parkinson's Disease Mouse Model.

According to a few studies, α-synuclein (αSyn) propagation has been suggested to play a key role in the pathomechanism of Parkinson's disease (PD), but neurodegeneration and the involvement of inflammation in its pathologic progression are not well understood with regard to temporal relationship. In this study, with the help of the PD mouse model injected with intrastriatal αSyn preformed fibril (PFF), the temporal evolution of αSyn propagation, inflammation, and neurodegeneration was explored in the perspective of the striatum and the whole brain. In the PFF-injected striatum, inflammatory response cells, including microglia and astrocytes, were activated at the earliest stage and reduced with time, and the phosphorylated form of αSyn accumulation increased behind it. Afterward, the degeneration of striatal dopaminergic neurons became significant with the conspicuity of behavioral phenotype. Similar patterns of forefront eruption of inflammation and then followed by αSyn propagation were noted in the opposite striatum, which were not injured by PFF injection. In analyzing the whole brain, inflammatory responses were activated at the earliest stage, and the soluble αSyn expression increased concurrently. The inflammatory response decreased afterward, and the accumulation of the insoluble form of αSyn increased behind it. Our results suggested that the inflammatory response may precede the accumulation of the pathologic form of αSyn; thereafter, the neurodegeneration and motor dysfunction followed αSyn proliferation in the PD mouse model. From this model, recognizing the temporal relationship between inflammation, αSyn propagation, and neurodegeneration may be helpful in establishing the PD animal model and monitoring the effect of interventional therapy.

The Eruption Patterns of the Teeth of Nigerian Local Pigs (Sus scrofa): Profile of Deciduous Teeth

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