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Biomedical subjects

J P Joho

Publications and source records attributed to J P Joho.

16 recordsLinked to original sources
PubMed1992

Long-term clinical and radiologic evaluation of autotransplanted teeth.

The purpose of the present study was to investigate the radiologic results of 40 autotransplantations (20 molars and 20 premolars) performed in the orthodontic department of the University of Geneva between 1979 and 1990. The sample demonstrated persistence of pulp vitality and continuous root development, followed, however, in most cases by replacement root resorption. The data were in accordance with previously published studies and point to an ideal developmental stage for molar and premolar transplantation to ensure pulpal and periodontal survival.

Adolescent↗
PubMed1992

Severely impacted canines: autotransplantation as an alternative.

Although orthodontic repositioning of impacted teeth is widely used, the treatment has its limitations. Autotransplantation is an alternative therapy that may be used in selected cases of severe impaction or when orthodontic repositioning is unsuccessful. Two case reports are presented to illustrate the use of the technique in patients with severely impacted canines. Indications and limitations are discussed.

Child↗
PubMed1992

[The radiological evaluation of autotransplants].

The purpose of the present study was to investigate the radiological results of 40 autotransplantations (20 molars and 20 premolars) performed in the Orthodontic Department of the University of Geneva between 1979 and 1990. The sample demonstrated persistence of pulp vitality and continuous root growth, followed however in most cases by ankylosis and replacement root resorption. The data were in accordance with previous published studies and point out an ideal developmental stage for molar and premolar transplantation to ensure pulpal and periodontal survival.

Adolescent↗
PubMed1979

[Growth].

Explore the source record for details and available documents.

Animals↗
PubMed1978

[The origin of class II].

Profound knowledge of craniofacial growth is of utmost importance to the clinician in order to establish a treatment plan which respects the growth type of each patient. Different growth processes and possible etiological factors leading to a skeletal Class II are discussed. Only a comprehensive analysis in all three dimensions will allow adequate choice of treatment procedure.

Adolescent↗
PubMed1978

[Class II--vertical dimension].

The vertical dimension and its implication in the etiology of the class II are described. This dimension is analysed at the level of the cranial base, the maxillary and mandibular bones and alveolar processes. Then, the facial architecture as a whole is considered and particularly the key position of the upper molar. The dorsal and low position of these teeth in the hyperdivergent cases is fundamentally different from the one they occupy in the hypodivergent cases. The therapeutic approach is completely different in both cases and is illustrated by means of three deep overbite and three open bite cases.

Alveolar Process↗
PubMed1978

[Class II--sagittal dimension].

Normal facial growth displaces maxilla and mandible forward and downward. The result is the skeletal and facial equilibrium described by Angle. In classe-II and class-III cases, growth patterns are modified as well as sagittal and vertical dento-facial dimensions. Development and differential diagnosis of skeletal and dental class-II cases are presented, in relation to their sagittal parameters only. The evolution of a class-II can be predicted with the help of several cephalometric measurements, so that the adequate therapy can be used in time to reestablish proper growth.

Adolescent↗
PubMed1978

[The marginal periodontium of impacted upper canines. Evaluation following various methods of surgical approach and orthodontic procedures].

The marginal periodontium of 29 impacted upper canines and several aspects of their treatment have been studied. The situation has been analysed after treatment according to 3 methods of surgery and orthodontics: a) excision and active eruption, b) excision and passive eruption and c) replaced flap and active eruption. Many aspects regarding the choice and course of treatment depend primarily on individual data of the patient and on the location of impaction. With surgical exposure by excision some mucogingival problems seem to appear, especially for vestibular impactions. In those cases the surgical techniques using replaced or deplaced flaps seem to be more indicated to preserve the periodontal tissues.

Adolescent↗
PubMed1977

[Failures and limitations of orthodontics in general practice].

5 cases are presented to review the causes of orthodontic failure: ignorance of growth and development; limited technics often associated with overestimation of clinical capabilities. The concept of extracting 4 premolars followed by "what ever nature will do with it" or by a partial so-called "social treatment" (read with a minimum of appliances) can no longer be accepted.

Adolescent↗