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- Lindsten, Rune
(author)
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The effect of maceration on the dental arches and the transverse cranial dimensions : a study on the pig
- 2002
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In: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 24:6, s. 667-676
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Journal article (peer-reviewed)abstract
- The dimensional change of the dental arches and the transverse cranial dimensions were studied in the pig to gain information on cranial post mortem changes and thus improve the possibilities of comparison between modern and skeletal samples. Dental arch dimensions were registered in 17 pigs within 30 minutes after they had been killed. The following day, the skulls were registered on lateral and axial radiographs. The animals were prepared, and storage and preparation included freezing and treatment in hot water. The water temperature did not exceed 65 degrees C. After this process, the skulls were again registered on lateral and axial radiographs. The skulls were then allowed to dry for 2 weeks and the direct measurements were repeated. The dimensions showed shrinkage of between 0 and 3.3 per cent. The mandible showed a greater change transversally in the posterior region than the cranium, which may have been due to its shape. The more deviant values for dimensional change were probably due to technical errors and the shrinkage may be expected to vary from 0.3 to 1.7 per cent, with greater values occurring in the posterior transverse parts of the mandible. A differential shrinkage in the maxilla could not be excluded and the values varied between 0.3 and 1.9 per cent. The results indicate that the crania in skeletal samples can be expected to be 0.3-1.7 per cent smaller than in vivo.
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- Marcusson, Agneta, 1956-, et al.
(author)
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Changes in occlusion and maxillary dental arch dimensions in adults with treated unilateral complete cleft lip and palate : A follow-up study
- 2004
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In: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 26:4, s. 385-390
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Journal article (peer-reviewed)abstract
- The purpose of this study was to evaluate the occlusion and maxillary dental arch dimensions in adults with repaired complete unilateral cleft lip and palate (UCLP) and to investigate the patterns of change in early adulthood. Study models from 39 patients (25 men, 14 women, mean age 24.7 years, range 20.2-29.3 years) with a diagnosis of complete UCLP taken at a follow-up examination were analysed and compared with the study models taken at baseline examination (mean age 19.1 years, range 16.0-20.6 years). Lip closure was carried out according to the Millard technique and palatal closure according to the Wardill-Kilner technique. All patients had received orthodontic treatment with fixed appliances. The patients were divided into three groups according to the type of retention in the upper arch: no retention (n = 15), retention with a bonded twisted retainer (n = 13), an onlay or fixed bridge (n = 11). Occlusion was evaluated according to a scoring system. The maxillary dental arch dimensions were measured with a video imaging system. There was a significant deterioration in the total occlusal score during the follow-up period and this was larger on the cleft than on the non-cleft side. There were no significant differences in the anterior scores. A comparison of the transversal and sagittal maxillary arch dimensions revealed significant differences in all measurements during the follow-up interval. The reduction was largest for the maxillary second premolar width, followed by the first molar width. The overjet differed significantly between the registrations. The occlusal score and the maxillary arch dimensions were reduced in all of the three subgroups, but there were no differences between the groups.
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- Marcusson, Agneta, 1956-, et al.
(author)
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Temporomandibular disorders in adults with repaired cleft lip and palate : a comparison with controls
- 2001
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In: European Journal of Orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 23:2, s. 193-204
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Journal article (peer-reviewed)abstract
- The purpose of this study was to investigate the prevalence of temporomandibular disorders (TMD), and assess psycho‐social distress in adult subjects with repaired complete cleft lip and palate (CLP). Sixty‐three adults (42 males and 21 females, mean age 24.2 years, range 19.5–29.2) with repaired CLP (CLP group) were compared with a group of 66 adults without cleft (non‐cleft group, 49 males and 17 females, mean age 25.5 years, range 20.2–29.9). All subjects underwent a clinical TMD examination, which followed the guidelines in the Research Diagnostic Criteria for TMD (RDC/TMD). Jaw function was assessed by evaluating answers to the mandibular function impairment questionnaire (MFIQ).Tension‐type headache was diagnosed according to the International Headache Society (IHS) classification. Psychological status was assessed using the depression score and the non‐specific physical symptom score with subscales of the Revised Symptom Checklist‐90 (SCL‐90‐R).The prevalence of reported pain in the face, jaws and/or TMJs was 14 and 9 per cent for the CLP and non‐cleft group, respectively, and did not differ significantly between the groups. The CLP group exhibited a significantly reduced jaw‐opening pattern (P < 0.001) and a higher frequency of crossbites (P < 0.05) compared with the non‐cleft group. Whilst jaw function was similar in both groups, a few items, e.g. speech and drinking, were significantly more impaired (P < 0.01) in the CLP group than in the non‐cleft group. There were no significant differences between the two groups concerning tension‐type headache or psycho‐social distress.The study found that overall TMD pain or psycho‐social distress was not more common in this CLP group than in a non‐cleft group.
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- Yeong, P, et al.
(author)
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Morphology of Singapore chinese
- 2004
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In: European journal of orthodontics. - : Oxford University Press (OUP). - 0141-5387 .- 1460-2210. ; 26:6, s. 605-612
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Journal article (peer-reviewed)
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- Robertsson, S, et al.
(author)
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The congenitally missing upper lateral incisor. A retrospective study of orthodontic space closure versus restorative treatment.
- 2000
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In: European journal of orthodontics. - 0141-5387. ; 22:6, s. 697-710
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Journal article (peer-reviewed)abstract
- Orthodontic treatment for patients with uni- or bilateral congenitally missing lateral incisors is a challenge to effective treatment planning. The two major alternatives, orthodontic space closure or space opening for prosthetic replacements, can both compromise aesthetics, periodontal health, and function. The aim of this retrospective study was to examine treated patients who had congenitally missing lateral incisors and to compare their opinion of the aesthetic result with the dentists' opinions of occlusal function and periodontal health. In this sample, 50 patients were identified. Thirty had been treated with orthodontic space closure, and 20 by space opening and a prosthesis (porcelain bonded to gold and resin bonded bridges). The patient's opinion of the aesthetic result was evaluated using the Eastman Esthetic Index questionnaire and during a structured interview. The functional status, dental contact patterns, periodontal condition, and quality of the prosthetic replacement was evaluated. In general, subjects treated with orthodontic space closure were more satisfied with the appearance of their teeth than those who had a prosthesis. No significant differences in the prevalence of signs and symptoms of temporomandibular dysfunction (TMD) were found. However, patients with prosthetic replacements had impaired periodontal health with accumulation of plaque and gingivitis. The conclusion of this study is that orthodontic space closure produces results that are well accepted by patients, does not impair temporomandibular joint (TMJ) function, and encourages periodontal health in comparison with prosthetic replacements.
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