| 1. |
- Ebrahim, Eman, et al.
(författare)
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The impact of premature birth on the permanent tooth size of incisors and first molars
- 2017
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Ingår i: European Journal of Orthodontics. - : Oxford University Press. - 0141-5387 .- 1460-2210. ; 39:6, s. 622-627
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Tidskriftsartikel (refereegranskat)abstract
- Background: Scientific evidence is insufficient to answer the question of whether premature birth causes altered tooth-crown dimensions. Objective: To evaluate permanent tooth-crown dimensions in prematurely born children and to compare the findings with full-term born controls. Subjects and Methods: Preterm children of 8-10 years of age were selected from the Swedish Medical Birth Register. One group consisted of 36 extremely preterm children (born before the 29th gestational week); the other group included 37 very preterm children (born during gestational weeks 29-32). The preterm children were compared with 41 matched full-term born children. Clinical examination and study casts were performed on all children. Permanent maxillary and mandibular first molars, central incisors, and laterals were measured with a digital sliding caliper on study casts. The tooth-crowns were measured both mesio-distal and bucco-lingual. Results: Both the mesio-distal and bucco-lingual measurements in the maxillary and mandibular first molars had a significantly smaller width in the extremely preterm group compared with the full-term group. The central incisors and lower laterals were significantly smaller mesio-distally in the extremely preterm group compared to the full-term group. A reduction in tooth size of 4-9% was found between the extremely preterm group and the full-term group for both boys and girls. The maxillary first molars and mandibular left first molar were also smaller mesio-distally in the extremely preterm group compared to the very preterm group. The results indicate that the more preterm the birth, the smaller the tooth-crown dimensions. Independent of gestational age girls had generally smaller teeth than boys. Conclusion: Premature birth is associated with reduced tooth-crown dimensions of permanent incisors and first molars.
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| 2. |
- Germa, Alice, et al.
(författare)
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Neonatal factors associated with alteration of palatal morphology in very preterm children : The EPIPAGE cohort study
- 2012
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Ingår i: Early Human Development. - : Elsevier. - 0378-3782 .- 1872-6232. ; 88:6, s. 413-420
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Tidskriftsartikel (refereegranskat)abstract
- Background: Altered palatal morphology has been observed among some preterm children, with possible consequences on chewing, speaking and esthetics, but determinants remain unknown. Aim: To explore the role of neonatal characteristics and neuromotor dysfunction in alteration of palatal morphology at 5 years of age in very preterm children. Study design: Prospective population-based cohort study. Subjects: 1711 children born between 22 and 32 weeks of gestation in 1997 or born between 22 and 26 weeks of gestation in 1998 were included in the study. They all had a medical examination at 5 years of age. Outcome measures: Alteration of palatal morphology. Results: The prevalence of altered palatal morphology was 3.7% in the overall sample, 5.1% among boys and 2.2% among girls (adj OR: 2.52; 95%CI: 1.44–4.42). The risk for altered palatal morphology was higher for lower gestational age (adj OR: 0.85; 95%CI: 0.74–0.97 per week), small-for-gestational age children (adj OR: 2.11; 95%CI: 1.20–3.72) or children intubated for more than 28 days (adj OR: 3.16; 95%CI: 1.11–8.98). Altered palatal morphology was more common in case of cerebral palsy or moderate neuromotor dysfunction assessed at 5 years. Results were basically the same when neuromotor dysfunction was taken into account, except for intubation. Conclusion: Male sex, low gestational age, small-for-gestational age and long intubation have been identified as probable neonatal risk factors for alteration of palatal morphology at 5 years of age in very preterm children. Further studies are needed to confirm these results.
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| 3. |
- Kallunki, Jenny, et al.
(författare)
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Outcomes of Early Class II Malocclusion Treatment : A Systematic Review
- 2018
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Ingår i: Journal of Dentistry: Oral Health Care & Cosmesis. - : Herald. - 2473-6783. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To undertake a systematic review of the evidence supporting early treatment (before the age of 10) of Class II malocclusion, with special reference to short and long-term outcomes: correction of overjet, dental relationships, improvement in intermaxillary relationships, soft tissue profile, associations to Temporomandibular Disorders (TMD), quality of life, incidence of trauma and cost-effectiveness. Material and methods: Four databases were searched, from January 1960 to October 2017. Inclusion criteria were randomized controlled or controlled trials reporting short or long-term effects on dental or basal relationships, soft tissue profile, associations to TMD, quality of life, incidence of trauma, or costs. The quality of evidence was scored according to GRADE. Results: 297 studies were identified and 23 satisfied the inclusion criteria for full evaluation. The quality of evidence was high in 5 studies, moderate in 3, and low in 15. There is lack of data on long-term outcomes and stability, thus all evidence is based on short-term results. There is high level of evidence that early treatment of Class II malocclusion with functional appliances reduces overjet and improves skeletal relationships, moderate evidence that headgear reduces overjet and restrains forward growth of the maxilla, but insufficient evidence to determine how early treatment influences soft tissue profile, TMD, quality of life, incidence of trauma or treatment-related costs. Conclusion: There is moderate to high evidence that in the short term, early treatment of Class II malocclusion division 1 reduces overjet and improves skeletal relationships.
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| 4. |
- Paulsson-Björnsson, Liselotte, et al.
(författare)
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Craniofacial morphology in prematurely born children
- 2009
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Ingår i: Angle orthodontist. - : The Angle Orthodontist (EH Angle Education & Research Foundation). - 0003-3219 .- 1945-7103. ; 79:2, s. 276-283
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To test the null hypothesis that there is no difference between the craniofacial morphology of prematurely born children and that of matched full-term born controls. MATERIALS AND METHODS: White children 8 to 10 years of age, born at the University Hospitals of Lund and Malmö and living in the same part of Sweden, were included. One group consisted of 36 very preterm children, born during gestational weeks 29 to 32; the other group included 36 extremely preterm children, who were born before the 29th gestational week. Subjects were compared with a control group of 31 full-term children, who were matched for gender, age, nationality, and living area. One lateral head radiograph was taken for each child, and the cephalometric analysis included 15 angular and 11 linear variables. Also, the height, weight, and head circumference of each child were registered. RESULTS: A significantly shorter anterior cranial base and a less convex skeletal profile were found among extremely preterm children, and significantly shorter maxillary length was noted in both extremely preterm and very preterm groups as compared with full-term children. The lower incisors were significantly more retroclined and retruded in the extremely preterm group compared with the very preterm group and the full-term control group. Extremely preterm children were significantly shorter, and both extremely preterm and very preterm children had significantly lower weight and smaller head circumference compared with full-term children. CONCLUSION: The null hypothesis was rejected because several craniofacial parameters differed significantly between preterm and full-term born control children.
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| 5. |
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| 6. |
- Paulsson-Björnsson, Liselotte
(författare)
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För tidigt födda kan ha ökat tandvårdsbehov
- 2010
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Ingår i: Tandläkartidningen. - 0039-6982. ; 102:4, s. 72-74
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Barn födda 3–4 månader för tidigt bör uppmärksammas av tandvården. Dessa barn kan ha fler bettavvikelser, större tandregleringsbehov och fler avvikelser i kraniofacial morfologi jämfört med fullgångna barn.
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| 7. |
- Paulsson-Björnsson, Liselotte, et al.
(författare)
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Permanent tooth-crown dimensions in Prematurely born children (Portoroz)
- 2010
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Ingår i: Abstract book. 86th Congress of the European Orthodontic Society.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- AIM: According to the literature, the scientific evidence is insufficient to answer the question as to whether premature birth causes altered tooth-crown dimensions. The aim of this study was to evaluate permanent tooth-crown dimensions in prematurely born children and to compare the findings with full-term born controls. SUBJECTS AND METHOD: White pre-term children, 8 to 10 years of age, were selected from the Swedish Medical Birth Register. One group consisted of 36 extremely pre-term children (born before the 29th gestational week), and the other 37 very pre-term children (born during gestational weeks 29 to 32). The pre-term children were compared with a control group of 41 full-term children, who were matched for gender, age, nationality and living area. Clinical examinations were undertaken and study casts and panoramic radiographs were obtained for each child. The permanent maxillary and mandibular first molars, central incisors and laterals were measured with a digital sliding calliper on the study casts. The tooth-crowns were measured both mesiodistally and buccolingually. The examiner conducting the measurement analysis was unaware of the subject grouping. RESULTS: The maxillary and mandibular first molars were smaller mesiodistally and buccolingually (P ≤ 0.01) whereas the central incisors and lower laterals were smaller mesiodistally (P ≤ 0.02) in the extremely pre-term group compared with the full-term group. A reduction in tooth size of 5-8 per cent was found between the extremely pre-term group and the full-term group. Furthermore, the maxillary first molars and mandibular left first molar were also smaller mesiodistally (P ≤ 0.035) in the extremely pre-term group compared with the very pre-term group. CONCLUSION: Premature birth is associated with reduced toothcrown dimensions of the permanent teeth, and the more preterm the birth the smaller the tooth-crown dimensions.
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| 8. |
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| 9. |
- Paulsson-Björnsson, Liselotte
(författare)
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Premature birth - studies on orthodontic treatment need, craniofacial morphology and function
- 2009
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Få studier har utvärderat om det finns något samband mellan för tidig födsel och bettavvikelser eller behov av tandreglering. Dessutom har inga tidigare studier undersökt om för tidigt födda barn skiljer sig från barn födda efter fullgången graviditet avseende ansiktsmorfologi, huvudvärk och temporomanibular dysfunktion (TMD), dvs. smärttillstånd och avvikande funktion lokaliserade till ansikte och käkar. Det övergripande syftet med denna avhandling är att i en unik serie av studier utvärdera och jämföra bettavvikelser, tandregleringsbehov, ansiktsmorfologi, TMD och huvudvärk mellan extremt för tidigt födda (födda före graviditetsvecka 29), mycket för tidigt födda (födda i graviditetsvecka 29-32) och fullgångna kontrollbarn.Avhandlingen är baserad på följande studier:Studie I är en systematisk litteraturöversikt med följande frågeställningar:-Påverkar för tidig födsel gommens morfologi, bettförhållandena, tändernas storlek samt tandanlagens utveckling och frambrott?-Påverkar oral intubering under neonatalperioden uppkomsten av eventuella morfologiska avvikelser?-Är dessa avvikelser permanenta eller övergående?Översikten omfattade tidsperioden från januari 1966 till november 2002 och har därefter även utökats att gälla t.o.m. september 2008. En kvalitetsbedömning gjordes även av de utvalda studierna.Syftet med studierna II-IV var att jämföra extremt för tidigt födda och mycket för tidigt födda 8-10-åringar med matchade fullgångna kontrollbarn avseende:-Förekomst av bettavvikelser och behov av tandreglering•Ansiktsmorfologi •TMD och huvudvärk Konklusioner i studie I inklusive den kompletterande litteratursökningen:-I litteraturen fanns det måttligt starkt underlag för att för tidigt födda barn har fler bettavvikelser jämfört med fullgångna barn. Det fanns begränsat underlag för att för tidigt födda barn inte har förseningar i tändernas frambrott, när hänsyn tas till korrigerad ålder. Underlaget i litteraturen var otillräckligt för att för tidig födsel orsakar permanenta avvikelser av gommens morfologi och avvikande tandstorlek. -Det är också önskvärt att utreda om för tidig födsel kan leda till ökat tandregleringsbehov, avvikande ansiktsmorfologi, TMD och huvudvärk. Konklusioner i studie II-IV:•De för tidigt födda barnen hade fler bettavvikelser och ett större tandregleringsbehov jämfört med de fullgångna kontrollbarnen.•Flera ansikts- och huvudmått skiljde sig mellan de för tidigt födda barnen och de fullgångna barnen.•Det fanns inga skillnader mellan de för tidigt födda barnen och de fullgångna barnen beträffande TMD eller huvudvärk. Klinisk betydelse:Den ökade överlevnaden av barn som är födda 3 till 4 månader för tidigt utgör en ny grupp i samhället. Tandvården bör därför vara medveten och uppmärksam på att dessa barn kan ha fler bettavvikelser, större tandregleringsbehov och avvikelser i ansikts- och huvudmått jämfört med fullgångna barn. Dock hade de för tidigt födda barnen vid 8-10 års ålder inte mer TMD eller huvudvärk än de fullgångna barnen.
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| 10. |
- Paulsson-Björnsson, Liselotte, et al.
(författare)
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The impact of premature birth on the mandibular cortical bone of children
- 2015
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Ingår i: Osteoporosis International. - : Springer. - 0937-941X .- 1433-2965. ; 26:2, s. 637-644
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Tidskriftsartikel (refereegranskat)abstract
- Children born prematurely often have reduced skeletal mineralization. The aim in this study was to compare the cortical thickness of the lower jaw on radiographs of 8- to 10-year-old children with histories of preterm or full term births. There were no significant differences in cortical thickness between full term and preterm children at this age. The purpose of this study was to compare the cortical thickness of the mandible on panoramic radiographs of 8- to 10-year-old children with histories of preterm or full term births. Panoramic radiography was performed on 36 extremely preterm, 38 very preterm and 42 full term children at the age of 8 to 10 years. Five observers independently measured the mandibular cortical width on the panoramic radiographs at four defined sites bilaterally. Altogether, 928 sites were available. Measurements were performed twice on a random 24 % of the sites by four observers. One-way analysis of variance with Tukey's post hoc test was used to test differences between groups. Intraclass correlation coefficient (ICC) was calculated for interobserver agreement while intra-observer agreement was expressed as measurement precision. Significant differences of mandibular cortical width were found between extremely preterm and very preterm children for five of the eight measurement sites with the very preterm showing the highest value. No significant differences were found between full term and either very preterm or extremely preterm except for one measurement site, with the extremely preterm showing the lowest value. ICC varied between 0.30 and 0.83 for the different sites (mean 0.62). The precision of a single measurement varied between 0.11 and 0.45 mm (mean 0.25 mm). From the evidence that very preterm children had significantly thicker mandibular cortices than extremely preterm children, we suggest that these findings may reflect the effect of mineral supplementation provided to premature infants, causing a 'shifting up' of bone mineral status relative to the full term peer group while maintaining the difference between very preterm and extremely preterm born children.
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