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Study of oral hygiene status and prevalence of gingival diseases in 10-12-year-old school children in Sholapur City, India 印度Sholapur市10-12岁学龄儿童口腔卫生状况及牙龈疾病患病率研究
Pub Date : 2011-03-30 DOI: 10.4314/NDJ.V18I1.64926
Tr Shyagali, Dp Bhayya
Objective: The study was carried out to assess the oral hygiene status and to determine the prevalence of gingival and periodontal diseases in 10-12-year-old school children in Sholapur City, India. Method: A total of 1045 children (560 boys and 485 girls) aged 10-12 years were evaluated by questionnaires related to oral hygiene practices and clinical examination using Simplified Oral Hygiene Index (OHI-S) , Gingival Index and Russell's Periodontal index. Result: All the children examined irrespective of the gender brushed their teeth with tooth brush and tooth paste. A total of 940 (90%) children brushed their teeth once in a day, while the remaining 105 (10%) brushed twice daily. Prevalence of gingival disease was 81% and males were more affected than females. Ten year old children were affected most by gingivitis. Good oral hygiene status was seen in 30% of total population examined, 2% had poor oral hygiene status and others (68%) showed fair oral hygiene status. Fifteen percent of the children had mild gingivitis, 64% had moderate gingivitis and 1% had severe gingivitis. Pockets were absent in all the children. Conclusion: There was a high prevalence of gingival disease in the population examined in this study, indicating the need for community health activities and awareness programme to improve the oral health of the people in this particular stratum of population. Key words: Oral hygiene, gingiva, Oral hygiene index, Gingival index, Periondontal index
目的:本研究旨在评估印度Sholapur市10-12岁学龄儿童的口腔卫生状况,并确定牙龈和牙周病的患病率。方法:采用简易口腔卫生指数(OHI-S)、牙龈指数和罗素牙周指数对1045名10 ~ 12岁儿童(男孩560名,女孩485名)进行口腔卫生习惯问卷调查和临床检查。结果:所有儿童不分性别均使用牙刷和牙膏刷牙。共有940名(90%)儿童每天刷牙一次,其余105名(10%)儿童每天刷牙两次。牙龈疾病的患病率为81%,男性高于女性。10岁儿童最易患牙龈炎。口腔卫生状况良好的占被检查总人口的30%,口腔卫生状况较差的占2%,其余68%的人口腔卫生状况一般。15%的儿童患有轻度牙龈炎,64%的儿童患有中度牙龈炎,1%的儿童患有重度牙龈炎。所有的孩子身上都没有口袋。结论:本研究调查的人群中牙龈疾病的患病率较高,表明需要开展社区卫生活动和宣传方案,以改善这一特定人群的口腔健康。关键词:口腔卫生,牙龈,口腔卫生指数,牙龈指数,牙周指数
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引用次数: 4
Bolton's ratios and tooth-size discrepancies in a Nigerian population 博尔顿的比例和尼日利亚人口的牙齿大小差异
Pub Date : 2011-03-30 DOI: 10.4314/NDJ.V18I1.64922
E. Ajayi
Objective: The aim of this study was to determine the Bolton's ratios and tooth size discrepancies in a Nigerian population. Method: The Bolton tooth size analysis was performed on 54 dental casts of Nigerian subjects comprising 33 (61%) males and 21 (39%) females (mean 26.6 ± 2.1 years). The overall and anterior tooth size ratios were determined, and gender differences among the sample population was evaluated with t-test. The frequency and magnitude of deviation of the Nigerian subjects outside 2 standard deviations from the Bolton's mean was also determined. Result: The result revealed no statistically significant gender differences in interarch tooth size ratios (p> 0.05) and the measurement for both males and females were therefore combined. The overall ratio was 92.1% ± 2.35 and anterior ratio was 78.9% ± 2.64. The overall tooth size discrepancy was present in 9.3% and the 25.9% of the subjects had anterior tooth size discrepancy in relations to more than 2 standard deviations from the Bolton's mean values. Conclusion: The study provided data on tooth size ratios among Nigerian subjects whose values were larger than Bolton's data. This study re-emphasized the importance of developing standards for each population. Key words: Tooth size discrepancy, Bolton’s ratios,
目的:本研究的目的是确定尼日利亚人口的博尔顿比率和牙齿大小差异。方法:对尼日利亚受试者54例牙模进行Bolton牙尺寸分析,其中男性33例(61%),女性21例(39%),平均年龄26.6±2.1岁。测定总体和前牙尺寸比,用t检验评估样本人群的性别差异。还确定了尼日利亚受试者偏离博尔顿平均值2个标准差以外的频率和幅度。结果:牙槽齿间大小比性别差异无统计学意义(p < 0.05),故将男女测量结果合并。总比值为92.1%±2.35,前路比值为78.9%±2.64。9.3%的受试者存在总体牙齿尺寸差异,25.9%的受试者存在前牙尺寸差异,其与Bolton平均值的关系大于2个标准差。结论:本研究提供了尼日利亚受试者的牙齿尺寸比数据,其值大于Bolton的数据。这项研究再次强调了为每个人群制定标准的重要性。关键词:齿径差;波顿比;
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引用次数: 2
Anterior bilateral temporomandibular joint dislocation: an emergency presentation 前双侧颞下颌关节脱位:一个紧急的表现
Pub Date : 2011-03-30 DOI: 10.4314/NDJ.V18I1.64928
A. Taiwo, O. Gbotolorun, BO. Ile-Ogedengbe
Anterior dislocation of the temporomandibular joint (TMJ) though an infrequent presentation at the emergency department; often demands an immediate reduction to relieve discomfort and prevent adverse long-term sequelae. A simple and effective technique to reduce the dislocation is successfully demonstrated by putting the operator's thumbs over the molar teeth of the patient and pushing the dislocated jaw downward and backward. We report the case of a patient who presented at our accident and emergency department with bilateral anterior TMJ dislocation and was successfully reduced with this simple technique. Keywords: Temporomandibular joints (TMJ), dislocation
颞下颌关节(TMJ)前脱位虽然在急诊科不常见的表现;通常需要立即减少,以减轻不适和防止不良的长期后遗症。一个简单而有效的技术,以减少脱位成功示范,将操作者的拇指放在病人的磨牙和推动脱位的下颌向下和向后。我们报告一例患者谁提出了我们的急诊科与双侧颞下颌关节前脱位,并成功地减少了这种简单的技术。关键词:颞下颌关节;脱位
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引用次数: 1
Pattern and surface prevalence of dental caries on posterior teeth of children in a Nigerian teaching hospital 尼日利亚一家教学医院儿童后牙龋齿的形态和表面患病率
Pub Date : 2011-01-13 DOI: 10.4314/NDJ.V17I2.63182
B. Popoola, O. Denloye
Objective: Knowledge of the pattern of dental caries in children is important in the designing of preventive clinical procedures, community-based programmes and formulation of appropriate treatment strategies for these children. This study therefore described the pattern and surface prevalence of dental caries on the posterior teeth of children attending Paedodontic clinic of University College Hospital, Ibadan, Nigeria. Method: All children aged 5 – 12 years attending the clinic for the first time within a period of 24 months (2005 – 2007) were examined clinically and radiographically (using bitewing radiographs) for dental caries. Tooth types and tooth surfaces affected were recorded and data was analyzed using Statistical Package for Social Sciences (SPSS) version 11. Result: The results showed that the most frequently affected tooth surface in primary teeth was approximal surface (58.6%) followed by occlusal surface (39.9%) while in permanent teeth, the reverse was the case (occlusal = 77.0%, approximal = 15.0%). The second primary molars were found to be more affected than first molars in primary dentition while first permanent molars were the most affected in permanent teeth. The distribution of dental caries was higher in the lower jaw than the upper jaw. There was a slight difference in sex predilection with females having higher mean dmft/DMFT than males, though this was not statistically significant. The aged group mostly affected was 5 – 8 years with mean dmft and DMFT of 2.68±1.84 and 0.21±0.54 respectively. Conclusion: The high occurrence of approximal caries in primary teeth observed revealed the need for the use of bitewing radiographs for early detection of such lesions while the high occurrence of occlusal caries in permanent dentition showed the need to design preventive clinical procedures such as the placement of fissure sealants on first molars so as to prevent occurrence of occlusal caries in high risk children. Key words: Dental caries, surface prevalence, posterior teeth, children
目的:了解儿童龋齿的类型对设计预防临床程序、社区规划和制定适当的治疗策略具有重要意义。因此,本研究描述了在尼日利亚伊巴丹大学学院医院儿科诊所就诊的儿童后牙龋齿的模式和表面患病率。方法:对2005 ~ 2007年24个月内首次就诊的5 ~ 12岁儿童进行临床及牙咬x线片检查。记录受影响的牙齿类型和牙齿表面,并使用社会科学统计软件包(SPSS)第11版对数据进行分析。结果:乳牙最常受影响的牙面为近牙面(58.6%),其次为咬合面(39.9%);恒牙最常受影响的牙面为近牙面(77.0%),近牙面(15.0%)。第一恒磨牙是恒牙中受影响最严重的,而第二恒磨牙是第一恒磨牙中受影响最大的。下颌龋的分布明显高于上颌。性别偏好有轻微差异,女性的平均dmft/ dmft高于男性,尽管这没有统计学意义。发病年龄以5 ~ 8岁为主,平均dmft为2.68±1.84,平均dmft为0.21±0.54。结论:观察到乳牙近似龋的高发生率,提示需要使用咬合x线片早期发现此类病变;恒牙列牙合龋的高发生率提示需要设计预防性临床操作,如在第一磨牙上放置裂隙封闭剂,以预防高危儿童牙合龋的发生。关键词:龋,表面患病率,后牙,儿童
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引用次数: 3
The relationship between dental caries and dental fluorosis in low, moderate and high fluoride areas of Udaipur district, India. 印度乌代普尔低、中、高氟地区龋齿与氟斑牙的关系。
Pub Date : 2011-01-13 DOI: 10.4314/NDJ.V17I2.63180
Manish Jain, Leena Sawla, Anmol Mathur, Tarun Nihlani, D. Prabu, S. Kulkarni
Objective: The purpose of the study was to assess the relationship between dental caries and dental fluorosis in Bhil Tribes living in Udaipur district India, known for endemic fluorosis. Method: A total of 420 Bhil tribes selected from areas with low (0-1.5mg/l), moderate (1.5-3.0mg/l) and high (>3mg/l) water fluoride concentration were interviewed and examined for caries and dental fluorosis. Dental caries and fluorosis were recorded according to the DMFT system and Dean Fluorosis index. All the Bhil tribes were exposed to a written questionnaire, constructed in English and translated into local language and – for control purposes – translated back to English. Intra-oral examination was conducted using by two examiners. Result: Bhil, Garasia, Meena and Gameti were most commonly present castes among Bhil tribes. The prevalence of dental fluorosis was 33.1% in low, 33.3% in moderate and 33.6% in high fluoride areas. In the low fluoride area mean number of decayed teeth and mean DMFT was 5.52 and 7.37 respectively while in high fluoride area it was higher, mean decayed and mean DMFT was 9.27 and 12.06 respectively. There was significant difference in mean DMFT between low, moderate andthe high fluoride areas (P = 0.00). DMFT score was 12.04 in severe fluorosis cases while it was 8.67 in normal fluorosis cases. There was significant difference in mean DMFT between all four castes (Bhil, Garasia, Meena and Gameti). Conclusion: Dental caries increases with increasing severity of dental fluorosis in low, moderate and high fluoride areas. Thus, a positive relationship between dental caries and dental fluorosis was observed in all the three areas. Key words: Dental caries, Fluorosis, Bhil tribes.
目的:本研究的目的是评估居住在印度乌代普尔地区以地方性氟中毒而闻名的Bhil部落的龋齿和氟牙症之间的关系。方法:选取水氟浓度低(0 ~ 1.5mg/l)、中(1.5 ~ 3.0mg/l)、高(0 ~ 3mg/l)地区的420个Bhil部落,进行龋病和氟斑牙检查。根据DMFT系统和迪恩氟中毒指数记录龋病和氟中毒。所有的Bhil部落都接触了一份书面问卷,问卷用英语编写,翻译成当地语言,为了控制目的,又翻译回英语。口腔内检查由两名检查官进行。结果:Bhil、Garasia、Meena和Gameti是Bhil部落中最常见的种姓。低氟区氟斑牙患病率为33.1%,中氟区为33.3%,高氟区为33.6%。低氟区平均龋数为5.52颗,平均龋数为7.37颗,高氟区平均龋数为9.27颗,平均龋数为12.06颗。低、中、高氟区平均DMFT差异有统计学意义(P = 0.00)。重度氟中毒患者DMFT评分为12.04,正常氟中毒患者DMFT评分为8.67。四个种姓(Bhil, Garasia, Meena和Gameti)的平均DMFT有显著差异。结论:低、中、高氟地区氟斑牙患龋率随氟斑牙严重程度的增加而增加。由此可见,龋病与氟斑牙之间存在正相关关系。关键词:龋齿,氟中毒,比希尔族
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引用次数: 1
Management of halitosis secondary to periodontal disease: report of four cases 牙周病继发口臭的处理:附4例报告
Pub Date : 2011-01-13 DOI: 10.4314/NDJ.V17I2.63185
E. Dosumu
Halitosis is an offensive odour emanating from the oral cavity and it is a common clinical condition. The purpose of this study is to emphasize the importance of the correct diagnosis of the type of halitosis in order to achieve a successful management. The four cases reported in this study revealed that a cause of the halitosis can be found most of the time following thorough examination. Elimination of the cause or source of the mal-odour eventually eliminates the halitosis. Dental practitioners should therefore be cautious in making a diagnosis of pseudo-halitosis and halitophobia which are very rare conditions and they should patients should be referred for expert management. Key words: Halitosis, Halitophobia, Pseudo-halitosis, management, diagnosis
口臭是一种令人讨厌的气味从口腔散发,它是一种常见的临床状况。本研究的目的是强调正确诊断口臭类型的重要性,以达到成功的治疗。本研究报告的四个病例表明,大多数情况下,经过彻底的检查,可以找到口臭的原因。消除异味的原因或来源,最终消除口臭。因此,牙科医生在诊断假性口臭和口臭恐惧症时应谨慎,这是非常罕见的情况,他们应该将患者转介给专家治疗。关键词:口臭;口臭恐惧症;假性口臭
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引用次数: 2
Biometrics of the primary dentition in a Nigerian sample 尼日利亚样本初级牙列的生物测定
Pub Date : 2011-01-13 DOI: 10.4314/NDJ.V17I2.63181
At Yemitan, O. Dacosta, O. Sanu, M. Isiekwe
Objective: The purpose of this study was to determine normative values of crown dimensions, arch dimensions, and amount of interdental space in the primary dentition of Nigerian children. Method: Dental casts from alginate impressions obtained from 125 randomly selected nursery school children (65 boys, 60 girls) aged 3 to 5 years, were measured with electronic caliper. Independent tests were used to analyze sample differences between sexes. Result: There were significant gender differences in arch width, depth and length dimensions, with the exception of the left mandibular anterior length. The boys showed significantly larger mesiodistal crown dimensions, except in the maxillary and mandibular primary lateral incisors. Gender differences in buccolingual crown diameters were statistically significant for maxillary second primary molars. There was no significant gender difference in amount of interdental spaces. Conclusion: It can be concluded that males had larger tooth/arch dimensions than females in the primary dentition stage. Key words: Biometric, dental arch, primary dentition, Nigerian
目的:本研究的目的是确定尼日利亚儿童初级牙列冠尺寸、牙弓尺寸和牙间隙量的规范值。方法:随机选取3 ~ 5岁幼儿125例(男65例,女60例),用电子卡尺对藻酸盐印模牙模进行测量。使用独立测试来分析性别之间的样本差异。结果:除左侧下颌前牙长度外,不同性别患者弓宽、弓深、弓长均存在显著差异。除上颌和下颌主侧切牙外,男孩的中远端冠尺寸明显增大。上颌第二磨牙颊舌冠直径的性别差异有统计学意义。在牙间隙数量上,性别差异无统计学意义。结论:在初级牙列阶段,男性的牙弓尺寸大于女性。关键词:生物识别,牙弓,初级牙列,尼日利亚
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引用次数: 1
Exclusive breastfeeding and its relevance to infant teething 纯母乳喂养及其与婴儿出牙的相关性
Pub Date : 2011-01-13 DOI: 10.4314/ndj.v17i2.63184
Ga Chukwu, C. Ogbonna, M. Gyang, S. Okolo
Objective: To determine the relevance of exclusive breast-feeding practice, in the development of healthy oral tissue among teething infants. Method: A cross sectional study design of children aged 6-36 months was carried out in 14 wards of Jos North Local Government Area. A multistage sampling technique was adopted in selecting 1081 mothers who qualified and were interviewed using structured interviewer questionnaire on their knowledge and perception on common complaints during teething in children. The index children were examined for number and type of teeth erupted using mouth mirror under natural light. Result: One thousand and eighty-one mothers and their babies were interviewed and examined; out these 16.5%, 38.7% and 44.8% babies were of age groups 6-12, 13-24 and 25-36 months respectively; 50.2% were female and 49.8% were male. Of the babies examined 62.4% were exclusively breast-fed. There was a significant association between maternal educational status and knowledge of teething complaints. Three hundred and twenty-six (30.1%) babies had cough during their teething period, 349 (32.3%) experienced drooling of saliva, and 352 (32.6%) were observed to bite objects during teething. The high percentage of babies that were exclusively breast-fed but did not experience these symptoms were found to be statistically significant (p = 0.00). Seven hundred and forty-two (68.6%) babies had diarrhoea during teething; out of these 459(42.5%) were exclusively breast-fed and it was however not found to be statistically significant (p = 0.55). Conclusion: This study draws attention to the relatively poor anecdotal evidence related to symptoms associated with the teething process. The result has also demonstrated that exclusive breast-feeding is not only able to reduce the symptoms ascribed to teething, but also promote the development of a healthy oral tissue. Key words: Breastfeeding, teething, development, oral tissues
目的:探讨纯母乳喂养与出牙期婴儿口腔健康组织发育的关系。方法:采用横断面研究设计,对乔斯北区14个病区6 ~ 36月龄儿童进行调查。采用多阶段抽样方法,选取1081名符合条件的母亲,采用结构化访谈问卷对其对儿童出牙期常见抱怨的了解和感知情况进行访谈。在自然光照射下用口腔镜检查患儿的出牙数量和类型。结果:对1181名母亲及其婴儿进行了访谈和检查;6-12月龄、13-24月龄和25-36月龄分别占16.5%、38.7%和44.8%;女性50.2%,男性49.8%。在接受调查的婴儿中,62.4%是纯母乳喂养的。母亲受教育程度与出牙抱怨知识之间存在显著相关性。326例(30.1%)患儿在出牙期出现咳嗽,349例(32.3%)患儿出现流口水,352例(32.6%)患儿在出牙期出现咬伤。纯母乳喂养但没有这些症状的婴儿的高比例被发现具有统计学意义(p = 0.00)。742名(68.6%)婴儿在出牙期间出现腹泻;其中459名(42.5%)是纯母乳喂养的,但没有发现统计学意义(p = 0.55)。结论:本研究提请注意与出牙过程相关的症状相对较差的轶事证据。结果还表明,纯母乳喂养不仅能够减少因出牙引起的症状,而且还能促进健康口腔组织的发育。关键词:母乳喂养,出牙,发育,口腔组织
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引用次数: 1
Taurodontism in association with the cusp of carabelli: a report of 2 cases 牛牙畸形与牛牙尖头症:附2例报告
Pub Date : 2011-01-13 DOI: 10.4314/NDJ.V17I2.63186
E. Sote, A. Ogunkola
Taurodontism is a malformation of multirooted teeth characterized by abnormally large pulp chamber and abnormally short roots. It is diagnosed by the use of radiographs. The cusp of Carabelli is a morphological anomaly of the crown usually seen clinically on the mesiopalatal surface of the maxillary first permanent molars. The aetiology of both anomalies is not entirely clear, however, both genetic and exogenous factors have been proposed. There are recent reports that mutation of some chromosomes could be a cause of taurodontism. Taurodontism has been reported along with talon cusp, dens evaginatus and some Syndromes. This paper presents an unusual occurrence of taurodontism in association with the cusp of Carabelli in a 15 year-old girl presenting with a toothache of 4 months duration and her 46 year-old mother. All the second permanent molars were taurodont. Other siblings investigated had cusps of Carabelli but no taurodont tooth. There was no associated syndrome in both mother and child. Root canal treatment of the pulpally involved taurodont mandibular left permanent second molar of the 15 year-old was carried out. Appropriate restorations were placed on all other carious molars. Her mother had no carious tooth. Taurodontism may present as pain when the affected tooth is carious or as a chance radiographic finding as it is the case in the mother. Preventive restorations of taurodont teeth is ideal treatment when detected early. The anthropological and clinical significance of the cusp of Carabelli is highlighted. The association of these two dental anomalies needs further investigation. Key words: Taurodontism, cusp of carabelli
牛牙畸形是一种多根牙齿畸形,其特征是牙髓腔异常大,牙根异常短。它是通过x光片诊断的。Carabelli尖牙是临床上常见于上颌第一恒磨牙中腭面冠的一种形态异常。这两种异常的病因尚不完全清楚,然而,遗传和外源性因素都被提出。最近有报道说,一些染色体的突变可能是牛牙畸形的一个原因。据报道,牛头畸形伴有爪尖、外翻牙和一些综合征。这篇文章提出了一个不寻常的发生的牛牙症与尖的Carabelli在一个15岁的女孩提出牙痛4个月的持续时间和她46岁的母亲。第二恒磨牙均为牛头齿。其他被调查的兄弟姐妹有卡拉贝利齿尖,但没有牛头齿。母亲和孩子均无相关综合征。对15岁患牙髓累及的牛头状下颌左恒磨牙进行根管治疗。其他龋牙均予适当修复。她母亲没有蛀牙。当受影响的牙齿龋齿时,可能会出现疼痛,或者像母亲的情况一样,是偶然的x射线发现。如果发现早,预防性修复是理想的治疗方法。强调了Carabelli尖端的人类学和临床意义。这两种牙畸形的关系有待进一步研究。关键词:剑齿虎;剑齿虎;剑尖
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引用次数: 0
Spectrum of diseases and pattern of referral at the Oral Diagnosis Clinic of a tertiary dental center 疾病的频谱和转诊模式在口腔诊断门诊三级牙科中心
Pub Date : 2011-01-01 DOI: 10.4314/NDJ.V19I2
O. Omitola, B. Osagbemiro, O. Akadiri
Objective: The purpose of this study was to determine the scope of oral diseases and referrals within the Dental Centre at the University of Port Harcourt Teaching Hospital (UPTH). Method: The clinic logbook of the Oral diagnosis clinic of the Dental centre, University of Port Harcourt Teaching Hospital was reviewed retrospectively over an 18-month period. Demographic and clinical data of all patients were retrieved and statistically analyzed using SPSS Version 17.0. Result: There were 2,249 patients comprising 945 (42%) males and 1,304 (58%) females. The age range was 1month to 95 years and mean age, 29.9 + 16.8 years. The mean age for male was 30.4 + 17.3years and for female, 29.5±16.4 years. Based on their age, patients were categorized into children, youth, middle age and elderly. Patronage was predominantly by the youth category (age 17- 40 years). The predominant pathology presented was complicated dental caries (41.1%). Traumatic injuries showed predilections for the male gender (87 males compared to 58 females). Most of the referrals were to the Oral and Maxillofacial Surgery Clinic (825 patients) and tooth extraction (741 adults, 147 paediatric extractions) was the major reason for referral. Conclusion: In spite of the worldwide epidemiological report of its reducing incidence, dental caries and its sequelae are still the major reasons for patronage of dental health services in our environment and dental extraction is the mostly consumed treatment modality. Keywords: Oro-facid diseases, Dental clinic attendance, Referrals
目的:本研究的目的是确定哈科特港大学教学医院牙科中心口腔疾病和转诊的范围。方法:回顾性分析哈考特港大学教学医院牙科中心口腔诊断门诊18个月的临床记录。检索所有患者的人口学及临床资料,采用SPSS 17.0进行统计学分析。结果:共有2249例患者,其中男性945例(42%),女性1304例(58%)。年龄1个月~ 95岁,平均29.9 + 16.8岁。男性平均年龄30.4±17.3岁,女性平均年龄29.5±16.4岁。患者按年龄分为儿童、青年、中年和老年。赞助人主要是青年人(17- 40岁)。以复杂龋病为主(41.1%)。外伤性损伤表现出男性的偏好(男性87例,女性58例)。大多数转介到口腔颌面外科诊所(825例),拔牙(741例成人,147例儿童)是转介的主要原因。结论:尽管世界范围内的流行病学报告显示龋病发病率正在下降,但龋病及其后遗症仍然是人们选择牙科保健服务的主要原因,拔牙是最常用的治疗方式。关键词:口腔黏膜疾病,牙科门诊就诊,转诊
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引用次数: 6
期刊
Nigerian Dental Journal
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