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Zweckma¨ssigkeit, bedeutung und gu¨ltigkeit der experimentellen forschung auf dem gebiet der kieferorthopa¨die und orthodontie
444
Am. J. Orrhod. November 1984
Reviews and abstracts
moved teeth no longer had angular defect morphology. On the pressure side, epithelium lined the root surface, was interposed between the root surface and the bone, and terminated at the apical limit of root instrumentation. On the tension side, the crest of the bone was located apical to the level of root planing and epithelium lined the instrumented portion of the root surface. It was concluded that orthodontic tooth movement into intrabony periodontal defects had no effect upon the levels of connective tissue attachment. T. M. Graber
guidelines for both orthopedic and orthodontic concepts and theories. T. M. Graber
Die bedeutung des skelettalen und dentalen alters fur die auswald des kieferorthopadischen behandlungssystems (The Significance of the Skeletal and Dental Ages for the Choice of Jaw-Orthopedic Therapy Appliances) P. Schopf
Zweckmassigkeit, Bedeutung und Gultigkeit der experimentellen Forschung auf dem Gebiet der Kieferorthopadie und Orthodontie (Purpose, Meaning, and Validity of Experimental Investigation in the Realm of Jaw Orthopedics and Orthodontics A. G. Petrovic Fortschr.
Kieferorthop.
45:165-186.
1984
The need for animal research is one of the current critical issues in dentofacial orthopedics and orthodontics. There is still controversy over the validity of extrapolating from the animal model to the human, but this is largely a matter of interpretation, objectivity or, in some cases, an unwillingness to desert earlier interpretations, even in the light of overwhelming evidence to the contrary by a host of other investigators. The author makes a strong plea for proper methodologic organization and explores the purpose, meaning, and validity of clinically relevant laboratory and animal experimentation. Deductive inferences may be made from anatomy and from certain clinical situations, and these may lead very quickly to working hypotheses for the orthodontist. However, the appropriate and carefully designed animal experimentation still remains, methodologically, the unsurpassed way to identify actual causal relationships in craniofacial growth mechanisms and in the modus operandi for functional appliances, for example. At a specific level of mammalian biologic organization, the notion of morphophysiologic similarity (between structures having equivalent origin, equivalent constituent parts, equivalent relations between their parts and equivalent behavior) plays a major role in the way rules of logical correspondence serve as links between experimental findings and clinical situations. Recent advances in cellular and molecular biology are an additional cognitive tool, helping the researcher and clinician to elaborate and develop interspecific correspondence rules and
Fortschr.
Kieferorthop.
45:24-32.
1984
This article analyzes the relationship between skeletal and dental ages and their influence on orthodontic treatment systems (that is, when fixed and when functional appliances are indicated). The sample for this study consisted of 529 girls and 483 boys (1,012 patients) between 5 and 15 years of age. Panoral radiographs and hand-wrist x-ray films were taken of each patient. In both sexes, the investigators found a significant difference between dental development and skeletal maturation (from + 4.5 to - 3.75 years). As expected, the pubertal growth curve is different for male and female samples; 36.5% of the girls, as compared to only 2.7% of the boys, did not have a complete permanent dentition by the time the peak pubertal growth spurt was achieved. The implications are that the final choice of fixed and/or functional appliances depends not only on the nature of the malocclusion and the growth increments and direction but also on the teeth present. This affects the order in which the appliances are used at a specific time. The choice is more restricted in girls since more than one third do not have a full complement of teeth at the pubertal peak. T. M. Graber
Research abstracts Long-Term Effect of Orthodontic Treatment on Crestal Alveolar Bone Levels B. E. Reed and A. M. Polson Eastman Dental Center, Rochester, N. Y. (From J. Dent. Res. 63: 257. 1984)
It was the purpose of the present study to evaluate crestal alveolar bone levels in individuals (Study
Am. J. Orrhod. November 1984
Reviews and abstracts
moved teeth no longer had angular defect morphology. On the pressure side, epithelium lined the root surface, was interposed between the root surface and the bone, and terminated at the apical limit of root instrumentation. On the tension side, the crest of the bone was located apical to the level of root planing and epithelium lined the instrumented portion of the root surface. It was concluded that orthodontic tooth movement into intrabony periodontal defects had no effect upon the levels of connective tissue attachment. T. M. Graber
guidelines for both orthopedic and orthodontic concepts and theories. T. M. Graber
Die bedeutung des skelettalen und dentalen alters fur die auswald des kieferorthopadischen behandlungssystems (The Significance of the Skeletal and Dental Ages for the Choice of Jaw-Orthopedic Therapy Appliances) P. Schopf
Zweckmassigkeit, Bedeutung und Gultigkeit der experimentellen Forschung auf dem Gebiet der Kieferorthopadie und Orthodontie (Purpose, Meaning, and Validity of Experimental Investigation in the Realm of Jaw Orthopedics and Orthodontics A. G. Petrovic Fortschr.
Kieferorthop.
45:165-186.
1984
The need for animal research is one of the current critical issues in dentofacial orthopedics and orthodontics. There is still controversy over the validity of extrapolating from the animal model to the human, but this is largely a matter of interpretation, objectivity or, in some cases, an unwillingness to desert earlier interpretations, even in the light of overwhelming evidence to the contrary by a host of other investigators. The author makes a strong plea for proper methodologic organization and explores the purpose, meaning, and validity of clinically relevant laboratory and animal experimentation. Deductive inferences may be made from anatomy and from certain clinical situations, and these may lead very quickly to working hypotheses for the orthodontist. However, the appropriate and carefully designed animal experimentation still remains, methodologically, the unsurpassed way to identify actual causal relationships in craniofacial growth mechanisms and in the modus operandi for functional appliances, for example. At a specific level of mammalian biologic organization, the notion of morphophysiologic similarity (between structures having equivalent origin, equivalent constituent parts, equivalent relations between their parts and equivalent behavior) plays a major role in the way rules of logical correspondence serve as links between experimental findings and clinical situations. Recent advances in cellular and molecular biology are an additional cognitive tool, helping the researcher and clinician to elaborate and develop interspecific correspondence rules and
Fortschr.
Kieferorthop.
45:24-32.
1984
This article analyzes the relationship between skeletal and dental ages and their influence on orthodontic treatment systems (that is, when fixed and when functional appliances are indicated). The sample for this study consisted of 529 girls and 483 boys (1,012 patients) between 5 and 15 years of age. Panoral radiographs and hand-wrist x-ray films were taken of each patient. In both sexes, the investigators found a significant difference between dental development and skeletal maturation (from + 4.5 to - 3.75 years). As expected, the pubertal growth curve is different for male and female samples; 36.5% of the girls, as compared to only 2.7% of the boys, did not have a complete permanent dentition by the time the peak pubertal growth spurt was achieved. The implications are that the final choice of fixed and/or functional appliances depends not only on the nature of the malocclusion and the growth increments and direction but also on the teeth present. This affects the order in which the appliances are used at a specific time. The choice is more restricted in girls since more than one third do not have a full complement of teeth at the pubertal peak. T. M. Graber
Research abstracts Long-Term Effect of Orthodontic Treatment on Crestal Alveolar Bone Levels B. E. Reed and A. M. Polson Eastman Dental Center, Rochester, N. Y. (From J. Dent. Res. 63: 257. 1984)
It was the purpose of the present study to evaluate crestal alveolar bone levels in individuals (Study