{"title":"用分形分析评价胎次对下颌骨结构的影响。","authors":"D D Üner, B S İzol, T H Edebal","doi":"10.4103/njcp.njcp_187_24","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Pregnancy and parity induce physiologic adaptations in maternal calcium and bone metabolism, yet their specific effects on mandibular trabecular architecture remain insufficiently characterized. Evidence on craniofacial bone across parity is limited and conflicting, underscoring the need to clarify whether parity relates to mandibular bone quality.</p><p><strong>Aims: </strong>The main aim of this study was to evaluate the effect of parity on mandibular bone architecture using fractal dimension analysis (FDA).</p><p><strong>Methods: </strong>Ninety-five healthy female subjects aged between 18 and 63 years were included in the study. Participants were divided into three groups based on the number of children: nulliparity (NP), multiparity (MP), and grand multiparity (GMP). Panoramic radiographs of the participants were analyzed by selecting three regions of interest (ROIs), each measuring 60 × 60 pixels: ROI-1, mandibular condyle; ROI-2, mandibular angle; and ROI-3, mandibular premolar region (1 mm below the root apex of the right first premolar).</p><p><strong>Results: </strong>No statistically significant differences were observed in the fractal dimension (FD) values of the mandibular condyle, mandibular angle, or mandibular premolar regions among the NP, MP, and GMP groups (P = 0.935; P > 0.05; P = 0.961 > 0.05; P = 0.870 > 0.05).</p><p><strong>Conclusion: </strong>This is the first study to assess the effect of parity on the mandibular bone. Investigating the relationship between parity and mandibular bone structure is important for understanding bone-related diseases such as periodontitis. The findings of this study indicate that parity does not influence the quality or architectural characteristics of the mandibular bone in women.</p>","PeriodicalId":19431,"journal":{"name":"Nigerian Journal of Clinical Practice","volume":"28 8","pages":"923-930"},"PeriodicalIF":0.7000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluation of the Effect of Parity on Mandibular Bone Structure Using Fractal Analysis.\",\"authors\":\"D D Üner, B S İzol, T H Edebal\",\"doi\":\"10.4103/njcp.njcp_187_24\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Pregnancy and parity induce physiologic adaptations in maternal calcium and bone metabolism, yet their specific effects on mandibular trabecular architecture remain insufficiently characterized. Evidence on craniofacial bone across parity is limited and conflicting, underscoring the need to clarify whether parity relates to mandibular bone quality.</p><p><strong>Aims: </strong>The main aim of this study was to evaluate the effect of parity on mandibular bone architecture using fractal dimension analysis (FDA).</p><p><strong>Methods: </strong>Ninety-five healthy female subjects aged between 18 and 63 years were included in the study. Participants were divided into three groups based on the number of children: nulliparity (NP), multiparity (MP), and grand multiparity (GMP). Panoramic radiographs of the participants were analyzed by selecting three regions of interest (ROIs), each measuring 60 × 60 pixels: ROI-1, mandibular condyle; ROI-2, mandibular angle; and ROI-3, mandibular premolar region (1 mm below the root apex of the right first premolar).</p><p><strong>Results: </strong>No statistically significant differences were observed in the fractal dimension (FD) values of the mandibular condyle, mandibular angle, or mandibular premolar regions among the NP, MP, and GMP groups (P = 0.935; P > 0.05; P = 0.961 > 0.05; P = 0.870 > 0.05).</p><p><strong>Conclusion: </strong>This is the first study to assess the effect of parity on the mandibular bone. Investigating the relationship between parity and mandibular bone structure is important for understanding bone-related diseases such as periodontitis. The findings of this study indicate that parity does not influence the quality or architectural characteristics of the mandibular bone in women.</p>\",\"PeriodicalId\":19431,\"journal\":{\"name\":\"Nigerian Journal of Clinical Practice\",\"volume\":\"28 8\",\"pages\":\"923-930\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nigerian Journal of Clinical Practice\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.4103/njcp.njcp_187_24\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/8/30 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"MEDICINE, GENERAL & INTERNAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nigerian Journal of Clinical Practice","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.4103/njcp.njcp_187_24","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/30 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 0
摘要
背景:妊娠和产次诱导母体钙和骨代谢的生理适应,但其对下颌小梁结构的具体影响仍未充分表征。颅面骨跨胎次的证据有限且相互矛盾,强调需要澄清胎次是否与下颌骨质量有关。目的:本研究的主要目的是利用分形维数分析(FDA)评估胎次对下颌骨结构的影响。方法:选取年龄在18 ~ 63岁的健康女性95例。参与者根据孩子的数量分为三组:无胎(NP),多胎(MP)和多胎(GMP)。通过选择三个感兴趣区域(roi)对参与者的全景x线片进行分析,每个区域的roi为60 × 60像素:ROI-1,下颌髁;ROI-2,下颌角;ROI-3为下颌前磨牙区(右第一前磨牙根尖下方1mm)。结果:NP组、MP组、GMP组下颌髁突、下颌角、下颌前磨牙区分形维数(FD)值差异无统计学意义(P = 0.935; P > 0.05; P = 0.961 > 0.05; P = 0.870 > 0.05)。结论:这是第一个评估胎次对下颌骨影响的研究。研究胎次与下颌骨结构之间的关系对了解牙周炎等骨相关疾病具有重要意义。本研究结果表明,胎次并不影响女性下颌骨的质量或结构特征。
Evaluation of the Effect of Parity on Mandibular Bone Structure Using Fractal Analysis.
Background: Pregnancy and parity induce physiologic adaptations in maternal calcium and bone metabolism, yet their specific effects on mandibular trabecular architecture remain insufficiently characterized. Evidence on craniofacial bone across parity is limited and conflicting, underscoring the need to clarify whether parity relates to mandibular bone quality.
Aims: The main aim of this study was to evaluate the effect of parity on mandibular bone architecture using fractal dimension analysis (FDA).
Methods: Ninety-five healthy female subjects aged between 18 and 63 years were included in the study. Participants were divided into three groups based on the number of children: nulliparity (NP), multiparity (MP), and grand multiparity (GMP). Panoramic radiographs of the participants were analyzed by selecting three regions of interest (ROIs), each measuring 60 × 60 pixels: ROI-1, mandibular condyle; ROI-2, mandibular angle; and ROI-3, mandibular premolar region (1 mm below the root apex of the right first premolar).
Results: No statistically significant differences were observed in the fractal dimension (FD) values of the mandibular condyle, mandibular angle, or mandibular premolar regions among the NP, MP, and GMP groups (P = 0.935; P > 0.05; P = 0.961 > 0.05; P = 0.870 > 0.05).
Conclusion: This is the first study to assess the effect of parity on the mandibular bone. Investigating the relationship between parity and mandibular bone structure is important for understanding bone-related diseases such as periodontitis. The findings of this study indicate that parity does not influence the quality or architectural characteristics of the mandibular bone in women.
期刊介绍:
The Nigerian Journal of Clinical Practice is a Monthly peer-reviewed international journal published by the Medical and Dental Consultants’ Association of Nigeria. The journal’s full text is available online at www.njcponline.com. The journal allows free access (Open Access) to its contents and permits authors to self-archive final accepted version of the articles on any OAI-compliant institutional / subject-based repository. The journal makes a token charge for submission, processing and publication of manuscripts including color reproduction of photographs.