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Biomedical subjects

J Tränkmann

Publications and source records attributed to J Tränkmann.

At least 19 recordsLinked to original sources
PubMed2001

Different orthodontic treatment effects in Angle Class III patients.

The aim of this study was to compare the different treatment effects observed in Angle Class III patients treated either exclusively in the primary dentition or receiving treatment initiated during the early mixed dentition. 14 patients from five families were enrolled in this retrospective study. The treatment course, appliances, treatment length and treatment outcomes were compared. The skeletal changes were assessed by analyzing cephalometric radiographs taken prior to, during and after completion of orthodontic treatment. In those patients receiving treatment in the primary dentition only, the course of treatment was more continuous and only one appliance had to be used. Moreover, the treatment time was shorter compared to those patients starting treatment in the early mixed dentition (5.4 +/- 2.1 vs 21.1 +/- 9.7 months). Treatment exclusively in the primary dentition showed better dentoalveolar results.

Cephalometry↗
PubMed2001

Suggestion for orthodontic and speech improving measures in CLP patients.

The objective of the present paper is to describe a soft palate level device, the veloretractor, which is a combination of orthodontic appliance and therapeutic aid in speech therapy. Its use is demonstrated in a case report of a child with complete bilateral cleft lip and palate. Both orthodontic and phoniatric/pedaudiologic treatment needs during the course are demonstrated along with the treatment results.

Age Factors↗
PubMed1999

A retrospective study of hearing, speech and language function in children with clefts following palatoplasty and veloplasty procedures at 18-24 months of age.

Many cleft palate teams currently schedule palatoplasty and veloplasty within the child's first year of life. At Hannover Medical School, palatoplasty and veloplasty are performed at approximately 18-24 months of age. It was questioned which speech and language outcome was achieved and whether it may be influenced by: (1) type and extent of the clefts; (2) velopharyngeal inadequacy; and (3) hearing disorders. A retrospective evaluation of data collected from 1985 to 1993 was performed summarizing receptive and expressive speech and language skills of 370 children aged 4.5 years. Cleft types were unilateral cleft lip and palate (UCLP, 30.0%), bilateral cleft lip and palate (BCLP, 28.7%), cleft hard and soft palate (CP, 21.6%), cleft soft palate (cleft velum, CV, 10.8%), cleft lip and alveolus (CLA, 5.8%) and submucous clefts (SUB, 3.2%). n = 86 had constant normal hearing, and n = 284 had conductive hearing loss > 20 dB (500-4000 Hz). Severe developmental phonology errors were found in 30-50% of children with repaired cleft palate and in less than 8% of patients with CLA and SUB. Posterior compensatory misarticulation was below 15% in the groups UCLP, BCLP, CP, CV and SUB. Nasal resonance and air emission was nearly normal in CLA, but was increased in 27% to 38% of the other cleft types. Children with conductive hearing loss had significantly more and severely affected phonology, morphology, syntax, vocabulary, language comprehension, and auditory perception than normal hearing children. Findings indicated that speech and language function in CLP patients were predominantly related to the hearing status.

Articulation Disorders↗
PubMed1999

Transverse changes after surgical closure of complete cleft lip, alveolus and palate.

Surgery for patients with unilateral (UCLP) and bilateral (BCLP) complete cleft lip, alveolus and palate has a considerable influence upon craniofacial growth. With respect to this, the cleft team at Hannover Medical School has attempted to reduce necessary surgical interventions to labioplasty, palatoplasty and veloplasty. Still, the effects of these operations influence maxillary growth to an extent which requires orthodontic treatment in all patients. This study focuses upon the transverse alterations of the alveolar arch and the deciduous dentition after lip and palate surgery. Dental casts prior to any surgical intervention and after labioplasty and complete palaotoplasty of the hard and soft palate were measured for transverse changes by using anatomical landmarks. The results indicate a significant occurrence of anterior relative to posterior arch width loss for both UCLP and BCLP patients. Orthodontic treatment should be planned and performed with respect to these findings in order to support craniofacial growth and prevent maxillary dental arch deficiency.

Alveolar Process↗
PubMed1998

The palatal shape of upper removable appliances. Influence on the tongue position in swallowing.

In a clinical-experimental study the influence of variations in the palatal shape of upper removable appliances upon tongue position during swallowing was investigated. During a clinical examination of 35 dental students displaying a physiological swallowing pattern, the tongue position during swallowing was recorded by palatography on an individually adapted upper plate. During swallowing with a roughened plate with an individual palatal shape and an imitated palatal papilla, the tongue position was significantly more posterior than with a highly polished, unstructured plate. The number of students displaying a visceral swallowing pattern was significantly smaller with a roughened plate with palatal folds and papilla then with a polished, smooth appliance. A roughened, individually shaped appliance with palatal folds and palatal papilla should therefore be used after myofunctional therapy and in cases where disturbance of tongue function by the appliance is not desirable.

Adult↗
PubMed1998

Influence of orthodontic treatment in the primary dentition upon development of the dentition and craniofacial growth.

UNLABELLED: Thirty patients who underwent orthodontic treatment of the primary dentition were examined in this retrospective follow-up study. The mean age at the beginning of treatment was 4.4 (+/= 1.1) years, and at follow-up 15.4 (+/- 1.7) years. Different kinds of malocclusion were present. RESULTS: The early treatment lasted on average 12.3 (+/- 7.2) months. Treatment time of Class III malocclusion and lateral crossbite was significantly shorter than that of Class II, 1 malocclusion, functional Class II, 2 malocclusion or anterior open bite (p < 0.05). A Class I occlusion was achieved in 90% of the patients during treatment of the primary dentition. No patient treated successfully in the primary dentition showed any relapse to initial malocclusion. CONCLUSION: These results suggest that changes in occlusion and mandibular position during treatment in the primary dentition are maintained in the mixed and permanent dentition. It can be concluded that a Class I occlusion following orthodontic treatment in the primary dentition serves as a basis for physiological development of the dentition and craniofacial growth.

Child, Preschool↗
PubMed1997

Comparative survey of osteotomized and nonosteotomized BCLP patients.

OBJECTIVE: At Hannover Medical School, treatment of BCLP patients was revised and updated in 1980. The objective of the present study was to evaluate the differences in treatment outcome between BCLP patients treated after the revised concept including infant orthopedics, and BCLP patients who received osteotomy in addition to surgical and orthodontic treatment during childhood. PATIENTS: Nine of 48 BCLP patients born between 1980 and 1983 received surgical and orthodontic treatment according to the Hannover concept. They were compared to 9 of 68 adolescent and adult patients from Hannover without this protocol, who underwent maxillary osteotomy and consecutive orthodontic treatment. MAIN OUTCOME MEASURES: Comparison of the two groups was made at the end of active orthodontic treatment by cast analysis and lateral cephalometrics to evaluate sagittal, transverse, and vertical changes. RESULTS AND CONCLUSIONS: No patient treated using the revised protocol showed characteristics of skeletal angle class III at any stage of investigation. No indication for osteotomy was found in this group. All patients with osteotomy had skeletal angle class III resulting from insufficient midfacial growth. Sagittal and vertical skeletal relations were successfully improved by osteotomy.

Adolescent↗
PubMed1995

[Follow-up study of dyskinesia-induced dysgnathias following myofunctional therapy].

Forty-eight patients with dysgnathia brought about by tongue dyskinesia underwent myofunctional therapy leading up to and at the beginning of orthodontic treatment. Short- and long-term results of this therapy were studied with the help of indirect palatography. Palatographs of empty swallowing and the test consonants "L", "N", "S" and "T" were evaluated visually and metrically. The palatographs were made prior to myofunctional therapy and thereafter first at the end of the therapy, then at the end of the control or supervision period, and finally, after on average 4 years. Visual evaluation revealed a clearly recognizable change in all functions when compared with the physiological palatographs. A change in the "S" consonant sound was the least conspicuous. Metric evaluation revealed for the 4 out of 5 of the test functions, namely, empty swallowing and the consonants "L", "N", and "T", marked long-term dorsal orientation of the tongue. The short-term changes in tongue function were more prevalent than the long-term.

Adolescent↗
PubMed1991

[The possibilities for surgical correction of dentoalveolar adaptations within skeletal repositioning osteotomy].

In the combined surgical orthodontic treatment the essential task is to eliminate the dentoalveolar adaptations of maxillofacial disorders. Additional segmental osteotomies can be considered if these adaptations are excessive or if complications are to be expected during the orthodontic treatment. Possibilities and indications as well as complications and limits of this approach are described.

Alveolar Process↗
PubMed1991

[The orthodontic conditions for late-primary osteoplasty in cheilognathopalatoschisis].

Pre- and postoperative orthodontic treatment at the time of labioplasty and palatoplasty are essential preconditions for a late-primary osteoplasty. As confirmed in my study this is important to achieve a sufficient base of the cleft jaw and a corresponding alveolus bone. Further conditions are a) the absence of the sagittal and transversal contractions of the cleft jaws and of cross-bites following labioplasty or/and palatoplasty, b) the proximity of germs to the cleft, c) the discrepancy between teeth and jaw size, and the indication for the extractions of teeth. Maxillary micrognathia require osteotomy.

Bone and Bones↗
PubMed1990

[Comparative studies of the prognosis of supporting areas].

After measuring average supporting zones in the deciduous and permanent dentition the "leeway space" is determined. The prognostic value of three methods is compared with the average supporting zones in the eugnathic permanent dentition. Separate measurements for the upper and lower jaw in the male and female were done. Correlations between early erupted teeth were considered in the prognosis of the size of the supporting zones. Prognostic values differ, they could be smaller, of equal size or larger compared with the average supporting zones. Average discrepancies range from 0 mm to 1.04 mm. Individual differences are larger amounting up to 3.24 mm. The average differences, but not the individual ones are probably only relevant in important clinical areas.

Adolescent↗
PubMed1989

[The surgical-orthodontic classification of retained and dystopic teeth of the second dentition in dysostosis cleidocranialis].

Dysostosis cleidocranialis concerns both teeth and jaw and is characterized by supernumerary teeth, dentitio tarda, tooth impaction and eventually follicular cysts. The concept of treatment can be divided in two stages: 1. At the beginning of the delayed secondary dentition (dentitio tarda) the operative removal of the supernumerary tooth germs and 2. corresponding to the belated morphological development (dentitio tarda) the operative exposure of the impacted teeth of the secondary dentition. The first operation facilitates a morphological development and especially a vertical drift without any obstacles. The second becomes necessary when only the morphological development, but not the vertical drift of the teeth of the secondary dentition takes place. The operative exposure is done using a self-developed technique [13, 18]. At the same time as the exposed teeth undergo a spontaneous vertical drift, orthopedic treatment for anomaly is started.

Adolescent↗