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Souza BDAF, Maglia DR, de Lima TB, da Silveira HLD, Visioli F. Systemic sequelae and craniofacial development in survivors of pediatric rhabdomyosarcoma. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024:102024. [PMID: 39191300 DOI: 10.1016/j.jormas.2024.102024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 08/21/2024] [Accepted: 08/24/2024] [Indexed: 08/29/2024]
Abstract
INTRODUCTION The aim of this study was to evaluate the systemic sequelae, as well as the dental and craniofacial development, of patients with rhabdomyosarcoma in relation to the treatment received and clinical-pathological variables. MATERIALS AND METHODS A retrospective cross-sectional study was performed. All individuals diagnosed with RMS between 1990 and 2022 were considered eligible. Cases who survived the primary tumor were included. Data were collected from medical records, and patients were called for clinical and radiographic examinations. RESULTS Thirty-eight patients were assessed, with a mean disease-free survival of 216.68 months (±84.99). The primary location of the tumor was mainly the head and neck region (57.9 %). All patients received chemotherapy, and 30 (78.9 %) also underwent radiotherapy. The most frequently observed sequela was sensory impairment, which was significantly associated with tumors in the head and neck (p < 0.05), as well as with the use of radiotherapy (p = 0.034). Root formation failure was observed in 60 % of cases, microdontia in 50 %, and delayed tooth eruption in 40 %. A convex profile was predominant (80 %), along with maxillary (50 %) and mandibular (80 %) retrusion and a skeletal class II diagnosis (60 %). CONCLUSIONS Late systemic, dental, and craniofacial developmental sequelae are observed in pediatric rhabdomyosarcoma survivors, especially in patients who underwent radiotherapy in the head and neck region. Younger individuals at the time of treatment are at greater risk of late sequelae.
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Affiliation(s)
- Bruna do Amaral Ferreira Souza
- Oral Pathology and Oral Medicine Department, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Deisi Romitti Maglia
- Oral Pathology and Oral Medicine Department, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | - Fernanda Visioli
- Oral Pathology and Oral Medicine Department, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil.
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Pombo Lopes J, Rodrigues I, Machado V, Botelho J, Bandeira Lopes L. Chemotherapy and Radiotherapy Long-Term Adverse Effects on Oral Health of Childhood Cancer Survivors: A Systematic Review and Meta-Analysis. Cancers (Basel) 2023; 16:110. [PMID: 38201538 PMCID: PMC10777916 DOI: 10.3390/cancers16010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
The survival rate for pediatric cancer has increased over the past few decades, short- and long-term complications have been detected and studied, and oral complications have emerged as an important topic of research. Here, we aimed to highlight the importance of oral manifestations that may only become apparent years or even decades after cancer treatment. This systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis. We searched articles using PubMed via the MEDLINE, Web of Science, and LILACS databases until October 2023. Overall, 35 observational studies were included, and the results estimated a pooled prevalence of the following dental anomalies: discoloration, 53%; crown-root malformations and agenesis, 36%; enamel hypoplasia, 32%; root development alterations, 29%; unerupted teeth, 24%; microdontia, 16%; hypodontia, 13%; and macrodontia, 7%. Most childhood cancer survivors have at least one dental sequela. Childhood cancer survivors presented a higher risk of having dental alterations than control counterparts. Additional analyses reveal possible sex-based differences that should be explored in future studies. These results collectively highlight the importance of oral healthcare and the prevention of disease in childhood cancer survivors.
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Affiliation(s)
- Joana Pombo Lopes
- Clinical Research Unit, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal; (J.P.L.); (I.R.); (V.M.); (J.B.)
| | - Inês Rodrigues
- Clinical Research Unit, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal; (J.P.L.); (I.R.); (V.M.); (J.B.)
| | - Vanessa Machado
- Clinical Research Unit, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal; (J.P.L.); (I.R.); (V.M.); (J.B.)
- Evidence-Based Hub, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - João Botelho
- Clinical Research Unit, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal; (J.P.L.); (I.R.); (V.M.); (J.B.)
- Evidence-Based Hub, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
| | - Luísa Bandeira Lopes
- Clinical Research Unit, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal; (J.P.L.); (I.R.); (V.M.); (J.B.)
- Evidence-Based Hub, Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, 2829-511 Almada, Portugal
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Long-Term Effect of Anticancer Therapy on Dentition in Childhood Cancer Survivors: An Observational, Cross-Sectional Study. Indian J Pediatr 2022; 89:327-332. [PMID: 34106443 DOI: 10.1007/s12098-021-03818-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 05/19/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To evaluate the presence of developmental dental anomalies, like microdontia, hypodontia, abnormally shaped teeth (AST), and developmental defects of enamel (DDE) in childhood cancer survivors and compare it with the healthy controls. METHODS This cross-sectional analytical study was conducted in 2 groups: childhood cancer survivors (CCS) group including children (> 12 y, m/f) who had undergone anticancer therapy (ACT) before 8 y of age and healthy control group (> 12 y, m/f) without any systemic disease. Pearson chi-square test was used to analyze the difference between the CCS group and the control group for microdontia, hypodontia, AST, DDE and for intragroup analysis in CCS group. Odds ratio was also calculated. RESULTS A total of 120 and 121 children were included in CCS and control group, respectively. The prevalence of microdontia, hypodontia, abnormally shaped teeth, and DDE was 17.5% (21), 5% (6), 8.33% (10), and 37.5% (45), respectively in CCS group. It was 8.2% (10), 2.5% (3), 1.65% (2), and 22.3% (27), respectively in the control group. A statistically significant difference was seen in microdontia (p = 0.032), abnormally shaped teeth (p = 0.017) and DDE (p = 0.01). Higher prevalence was seen when ACT began at an early age. CONCLUSION An association between developmental dental anomalies and anticancer therapy (ACT) exists with significantly higher difference in microdontia, abnormally shaped teeth and DDE among survivors of childhood cancer as compared to healthy population. These known adverse effects of ACT on developing teeth should be considered during treatment planning of the children having cancers.
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A Long-Term Follow-Up of Dental and Craniofacial Disturbances after Cancer Therapy in a Pediatric Rhabdomyosarcoma Patient: Case Report. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182212158. [PMID: 34831922 PMCID: PMC8621981 DOI: 10.3390/ijerph182212158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/17/2022]
Abstract
Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma in children and adolescents. A boy aged seven years and five months was diagnosed with stage three group III embryonal parameningeal RMS with intracranial extension. He received chemotherapy for 23 weeks in combination with localized radiotherapy during the inductive phase of nine weeks (a total tumor dose of 5040 cGy). Three months later, he was referred to the department of pediatric dentistry for radiation-induced caries, the treatment of which was later terminated because of severe trismus and radiation-induced oropharyngeal mucositis. Three years later, the patient returned for the fitting of a prosthesis because of mastication problems. The dental treatments performed included: extraction, banding, composite resin restorations, root canal fillings, and stainless steel crown fabrication. An interim denture was fitted due to the poor retention of the fixed prosthesis. As the patient grew older, they developed facial asymmetry as a result of the prominent atrophy of their right cheek. By the age of 32, they had lost multiple teeth and exhibited severe facial deformity. Therefore, it is essential not only to involve a multidisciplinary medical team before, during, and after cancer therapy, but also to initiate long-term follow-ups given the potential effects of late sequelae after chemoradiation in multiple developmental areas.
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Kameoka R, Kawakami T, Maeda M, Hori T, Yanagisawa A, Shirase T. Dental management of a childhood cancer survivor with malformed primary teeth. PEDIATRIC DENTAL JOURNAL 2020. [DOI: 10.1016/j.pdj.2019.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
One of many possible complications of cancer therapy in children is enamel demineralization and such changes in the ion content of dental hard tissues may increase susceptibility to caries. The study aims to assess the prevalence of dental caries among childhood cancer survivors.A cross-sectional study was conducted on 225 children aged between 4 and 18 years, including 75 cancer patients and 150 sex- and age-matched controls. The cancer survivors were recruited from single pediatric oncology center. The control group was formed from students of randomly selected kindergartens and schools. Dental investigation was held between July 2013 and January 2016, approximately 5 years after the cessation of anticancer treatment (range: 6-155 months). The occurrence of dental caries was assessed with DMF/dmf index (showing the mean number of decayed, missing and filled permanent/deciduous teeth). Univariate statistical approach was performed and P-values < .05 were considered as statistically significant.The frequency of dental caries was comparable in both groups (85.4% vs 84%). However, the DMF index was higher in cancer patients than in controls: the median and interquartile ranges were 2 (0-4) vs 0 (0-2); P < .01. This correlates with duration of anticancer therapy (r = 0.26; P < .05). Moreover, children who had radiotherapy of the head and neck regions had significantly higher DMF scores than the ones who did not: 4.5 (1-6) vs 2 (0-4); P < .05. Socioeconomic and education status within family also has a significant impact on DMF scores in the cancer group. In conclusion, cancer patients, particularly those with a poor social background, should receive professional dental care as their caries process is more active than that of healthy peers.
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Affiliation(s)
| | | | | | - Małgorzata Zubowska
- Departments of Pediatrics, Oncology and Hematology, Medical University of Lodz, Poland
| | - Wojciech Fendler
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
- Departments of Biostatistics and Translational Medicine, Medical University of Lodz, Lodz, Poland
| | - Wojciech Młynarski
- Departments of Pediatrics, Oncology and Hematology, Medical University of Lodz, Poland
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Conservative Management of Dental Erosion in Adolescents with Medical Conditions. Case Rep Dent 2018; 2018:3230983. [PMID: 30647975 PMCID: PMC6311861 DOI: 10.1155/2018/3230983] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 11/20/2018] [Indexed: 11/24/2022] Open
Abstract
The prevalence of dental erosion among children and adolescents is trending higher in recent decades and is becoming a major concern. Dental erosion can be caused by either extrinsic or intrinsic acids or both. One of the established aetiological factors for dental erosion by intrinsic acid is the gastrooesophageal reflux disease. The degree of dental erosions may be influenced by any medical conditions that cause a reduction in salivary flow such as the salivary gland excision, autoimmune disease, radiation to the head and neck regions, and medications. If left untreated, the dental erosion can cause dentine hypersensitivity, loss of occlusal vertical height, and aesthetic problems. For effective management of dental erosion, the aetiology of each case must be determined, and its detection at an early stage is of prime importance. This case report illustrates the conservative management of dental erosion in two adolescent patients presented with their medical conditions and behaviour issues. The aim of the treatments was to preserve the vitality of the affected teeth. The treatments were successfully completed using a conservative approach, with the patients' medical conditions taken into consideration.
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Oral and dental alterations and growth disruption following chemotherapy in long-term survivors of childhood malignancies. Support Care Cancer 2018; 27:1891-1899. [DOI: 10.1007/s00520-018-4454-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 08/30/2018] [Indexed: 11/30/2022]
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Busenhart DM, Erb J, Rigakos G, Eliades T, Papageorgiou SN. Adverse effects of chemotherapy on the teeth and surrounding tissues of children with cancer: A systematic review with meta-analysis. Oral Oncol 2018; 83:64-72. [DOI: 10.1016/j.oraloncology.2018.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/29/2022]
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Cyclophosphamide-Induced Morphological Changes in Dental Root Development of ICR Mice. PLoS One 2015; 10:e0133256. [PMID: 26186337 PMCID: PMC4506128 DOI: 10.1371/journal.pone.0133256] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 06/25/2015] [Indexed: 12/11/2022] Open
Abstract
Background Survivors of childhood cancer are at risk of late dental development. Cyclophosphamide is one of the most commonly used chemotherapeutic agents against cancer in children. The aim of this study was to investigate the effects of cyclophosphamide on root formation in the molars of growing mice and to assess the morphological changes in these roots using three-dimensional structural images. Methods We treated 16 12-day-old ICR mice with cyclophosphamide (100 mg/kg, i.p.) and 16 control mice with saline. At 16, 20, 24, and 27 days of age, the mandibular left first molars were scanned using soft micro-computed tomography. After scanning, the structural indices were calculated using a three-dimensional image analysis system, and the images were subjected to three-dimensional reconstruction. The length and apical foramen area of all distal roots were assessed. Histological changes in the apical region were then assessed via hematoxylin and eosin staining. Results The mandibular molars of all experimental mice showed evidence of cytotoxic injury, which appeared in the form of anomalous root shapes. Although all roots developed further after cyclophosphamide injection, the three-dimensional structural images showed that the roots in the experimental group tended to develop more slowly and were shorter than those in the control group. At 27 days of age, the mean root length was shorter in the experimental group than in the control group. Conversely, the apical foramen of the roots in the experimental group tended to close faster than that of roots in the control group. In addition, hematoxylin and eosin staining of the distal roots in the experimental group showed increased dentin thickness in the apical region. Conclusion Our results suggest that cyclophosphamide can result in short root lengths and early apical foramen closure, eventually leading to V-shaped or thin roots.
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Effinger KE, Migliorati CA, Hudson MM, McMullen KP, Kaste SC, Ruble K, Guilcher GMT, Shah AJ, Castellino SM. Oral and dental late effects in survivors of childhood cancer: a Children's Oncology Group report. Support Care Cancer 2014; 22:2009-19. [PMID: 24781353 PMCID: PMC4118932 DOI: 10.1007/s00520-014-2260-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 04/16/2014] [Indexed: 12/18/2022]
Abstract
PURPOSE Multi-modality therapy has resulted in improved survival for childhood malignancies. The Children's Oncology Group Long-Term Follow-Up Guidelines for Survivors of Childhood, Adolescent, and Young Adult Cancers provide practitioners with exposure- and risk-based recommendations for the surveillance and management of asymptomatic survivors who are at least 2 years from completion of therapy. This review outlines the pathophysiology and risks for oral and dental late effects in pediatric cancer survivors and the rationale for oral and dental screening recommended by the Children's Oncology Group. METHODS An English literature search for oral and dental complications of childhood cancer treatment was undertaken via MEDLINE and encompassed January 1975 to January 2013. Proposed guideline content based on the literature review was approved by a multi-disciplinary panel of survivorship experts and scored according to a modified version of the National Comprehensive Cancer Network "Categories of Consensus" system. RESULTS The Children's Oncology Group oral-dental panel selected 85 relevant citations. Childhood cancer therapy may impact tooth development, salivary function, craniofacial development, and temporomandibular joint function placing some childhood cancer survivors at an increased risk for poor oral and dental health. Additionally, head and neck radiation and hematopoietic stem cell transplantation increase the risk of subsequent malignant neoplasms in the oral cavity. Survivors require routine dental care to evaluate for potential side effects and initiate early treatment. CONCLUSIONS Certain childhood cancer survivors are at an increased risk for poor oral and dental health. Early identification of oral and dental morbidity and early interventions can optimize health and quality of life.
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Affiliation(s)
- Karen E Effinger
- Division of Pediatric Hematology/Oncology/Stem Cell Transplantation, Stanford University, 1000 Welch Rd, Suite 300, Palo Alto, CA, 94304, USA,
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Gawade PL, Hudson MM, Kaste SC, Neglia JP, Constine LS, Robison LL, Ness KK. A systematic review of dental late effects in survivors of childhood cancer. Pediatr Blood Cancer 2014; 61:407-16. [PMID: 24424790 PMCID: PMC4281834 DOI: 10.1002/pbc.24842] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 10/08/2013] [Indexed: 11/10/2022]
Abstract
Survivors of childhood cancer are at risk for dental late effects. This systematic review summarizes associations between treatment exposures and dental late effects among survivors of childhood cancer. We included investigations with at least 20 study participants conducted for 2 or more years after completion of childhood, adolescent, or young adult cancer therapy. This review suggests both independent and additive effects of radiotherapy and chemotherapy on dental complications, and identifies vulnerable groups with specific host and treatment characteristics. This summary provides information that will assist clinicians to prevent, detect, and facilitate early intervention for dental late effects.
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Affiliation(s)
- Prasad L. Gawade
- Department of Epidemiology and Cancer Control, St. Jude
Children’s Research Hospital, Memphis, TN 38105
| | - Melissa M. Hudson
- Department of Epidemiology and Cancer Control, St. Jude
Children’s Research Hospital, Memphis, TN 38105 ,Oncology, St. Jude Children’s Research Hospital, Memphis, TN
38105
| | - Sue C. Kaste
- Oncology, St. Jude Children’s Research Hospital, Memphis, TN
38105 ,Radiological Sciences at St. Jude Children’s Research
Hospital, Memphis, TN 38105 ,Department of Radiology, College of Medicine, University of
Tennessee Health Science Center, 910 Madison, Suite 1002, Memphis, TN 38163
| | - Joseph P. Neglia
- Department of Pediatrics, University of Minnesota Medical School,
Minneapolis, MN 55455
| | - Louis S. Constine
- Departments of Radiation Oncology and Pediatrics, School of Medicine
and Dentistry, University of Rochester Medical Center, 601 Elmwood Ave, Box 647,
Rochester, NY 14642
| | - Leslie L. Robison
- Department of Epidemiology and Cancer Control, St. Jude
Children’s Research Hospital, Memphis, TN 38105
| | - Kirsten K. Ness
- Department of Epidemiology and Cancer Control, St. Jude
Children’s Research Hospital, Memphis, TN 38105
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Pedersen LB, Clausen N, Schrøder H, Schmidt M, Poulsen S. Microdontia and hypodontia of premolars and permanent molars in childhood cancer survivors after chemotherapy. Int J Paediatr Dent 2012; 22:239-43. [PMID: 22092748 DOI: 10.1111/j.1365-263x.2011.01199.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
BACKGROUND Adverse long-term general and dental health effects of cancer and cancer therapy during childhood have been reported. AIM To examine the association between chemotherapy before the age of 8 years and (1): microdontia; (2): hypodontia of premolars and permanent molars. MATERIAL AND METHODS In The Danish Registry of Childhood Cancer (DBCR), we identified 203 children who met the following inclusion criteria: (1) age below 8 years at the start of treatment; (2) age between 12 to 18 years upon dental examination; (3) had received chemotherapy The exclusion criterion was radiotherapy to the head and neck. A total of 150 children fulfilled the inclusion criteria. As controls, a random sample of 193 age-matched unexposed children was included. RESULTS Microdontia was found in a total of 88 teeth in 29 (19.3%) of the 150 children who had been exposed to chemotherapy, while none of the controls had microdontia of premolars or permanent molars (difference: 19.3%; 95% CL: 13.5%; 26.4%). The earlier the exposure, the more frequent was microdontia. We found a total of 27 missing premolars and permanent molars in 14 (9.3%) of the exposed children and a total of 18 missing premolars and permanent molars in 8 (4.1%) of the controls (difference: 5.2%; 95% CL: -0.1%; 11.3%). CONCLUSION The present study confirms findings from previous studies that chemotherapy, especially in very young children, causes microdontia and hypodontia of premolars and permanent molars.
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Affiliation(s)
- Lisbeth Bønløkke Pedersen
- Department of Pediatric Dentistry, School of Dentistry, Faculty of Health Sciences, Aarhus University, Aarhus C, Denmark
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Cubukcu CE, Sevinir B, Ercan I. Disturbed dental development of permanent teeth in children with solid tumors and lymphomas. Pediatr Blood Cancer 2012; 58:80-4. [PMID: 21254371 DOI: 10.1002/pbc.22902] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 10/11/2010] [Indexed: 11/09/2022]
Abstract
BACKGROUND Deficient dental root development has been reported after conventional pediatric anticancer therapy but less information is available on children with solid tumors and lymphomas. PROCEDURE We examined dental development from panoramic radiographs (PRGs) of 37 childhood cancer survivors (CCS) treated under the age of 10 years with multimodal chemotherapy (CT) and/or head and neck radiotherapy (RT). A novel defect index (DeI) was used to describe the total damage to permanent dentition. The DeI was also tested in matched controls. RESULTS All CCS had dental disturbances including abnormal root development (86.4%), microdontia (13.5%) and tooth agenesis (16.2%). Testing the controls gave the mean DeI value 1.9 ± 2.7 (range, 0-12), while the index scores in the study group varied from 0 to 49 (mean 10.8 ± 11.2) (P < 0.01). The statistical differences in the mean DeI values were insignificant between CT and CT and RT groups (P > 0.05). CONCLUSIONS Children treated for solid tumors and lymphomas are at considerable risk of some disturbances in developing dental structures. RT increased the severity of disturbances induced by CT. Studies should further elucidate dose-, age and time-related effects of anticancer treatment on dental development.
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