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Biomedical subjects

J F Henriques

Publications and source records attributed to J F Henriques.

12 recordsLinked to original sources
PubMed2000

Eruption Guidance Appliance effects in the treatment of Class II, Division 1 malocclusions.

The objective of this research was to cephalometrically evaluate the possible effects of the Eruption Guidance Appliance on the craniofacial complex in a sample of 30 patients, over a treatment period of 26 months. The experimental sample consisted of 30 patients (13 females and 17 males), 27 of which presented with a Class II, Division 1 malocclusion and 3 with a Class I malocclusion. The mean initial chronologic age was 9 years; the treatment period lasted 26 months. A control group was used for comparison and consisted of 30 subjects (13 females and 17 males) of similar ages and spanned a similar observation period. Twenty-six subjects of this control group had Class II, Division 1 malocclusions, and 4 had Class I malocclusions. Lateral cephalometric headplates were obtained for the experimental group initially and after 26 months of treatment. The subjects in the control group were randomly selected from a serial growth study sample from the Orthodontic Department at Bauru Dental School, University of São Paulo, for whom cephalometric headplates were obtained annually from 4 to 18 years of age. Comparative statistics were used to assess possible differences between the experimental and control groups during the 26-month period of observation. Results demonstrated statistically significant increases in mandibular growth, degree of mandibular protrusion, lower anterior and total anterior face height, mesial migration of the lower molars, and mandibular posterior dentoalveolar height. There was also lingual tipping and retrusion of the upper incisors, linear protrusion of the lower incisors, improvement in the maxillomandibular relationship and in molar relationship, as well as a significant decrease in the overjet and overbite and an inhibition of the vertical development of the upper incisors. The study demonstrated no significant changes in maxillary growth during the evaluation period. It was concluded from these results that the effects of the Eruption Guidance Appliance during this time period were mostly dentoalveolar, with a smaller, but significant, skeletal effect.

Cephalometry↗
PubMed2000

A radiographic comparison of apical root resorption after orthodontic treatment with 3 different fixed appliance techniques.

Apical root resorption is an undesirable, but frequent side effect of orthodontic treatment, and therefore improvements in orthodontic techniques and materials are in constant development to decrease it. One of the most recently developed orthodontic techniques is the Bioefficient Therapy that uses contemporary orthodontic materials. Therefore, the primary objective of this study was to compare the amount of root resorption after orthodontic treatment between the simplified standard edgewise technique (group 1), the edgewise straight wire system (group 2), and the Bioefficient Therapy (group 3). It was also the purpose of this investigation to evaluate the amount of root resorption in the whole sample studied and the prevalence of root resorption in the upper and lower incisors. Thus, periapical radiographs were obtained with the long cone paralleling technique for the upper and lower incisors from 30 patients for each group. Root resorption was ranked by scores by 2 examiners who had an excellent intra and interexaminer calibration by Kendall concordance coefficient. Results of the Kruskal-Wallis test demonstrated that group 3 (Bioefficient Therapy) presented less root resorption than the others. It was speculated that the factors responsible for the lesser resorption in this technique were the use of heat-activated and superelastic wires with the bracket design in this technique as well as the use of a smaller rectangular stainless steel wire (0.018 x 0.025 inch) in a 0.022 x 0.028 inch slot during incisor retraction and the finishing stages, as compared to the other techniques. Considering the whole sample, there was no root resorption in 2.25% of the analyzed teeth. There was only a slight resorption in 42.56%, a moderate resorption in 53.37%, an accentuated resorption in 1.40% and an extreme root resorption in only 0.42% of the teeth. The prevalence of resorption for each incisor indicated, in decreasing order, a greater resorption for the upper centrals, followed by the upper laterals, lower centrals, and lastly the lower lateral incisors.

Adolescent↗
PubMedDate not supplied

[Cephalometric study of the effect of orthodontic treatment on the mandible in Class II, Division 1 patients].

In this study, an analysis of the skeletal and dental components of Class II, division I, malocclusion patients, of both sexes, with and or without orthodontic treatment, was established. Based on 4 angular (SNA, SNB, ANB and FMA) and 2 linear (Nperp-Pog and ENA-M) cephalometric measurements analysis, we arrived at the following conclusions: 1--No significant difference was found between cases treated with or without extraction; 2--Sexual dimorphism was observed only with the SNB and SNA measurements, in treated cases; 3--Significant difference was established in all measurements, with the exception of the SNB angle, between cases with or without orthodontic treatment.

Cephalometry↗
PubMedDate not supplied

[Rapid maxillary expansion: clinical and radiographic principles].

The midpalatine suture disjunction as an auxiliary means in the treatment of malocclusions with horizontal craneal base deficiencies has become a routine procedure in the orthodontic clinic. Therefore, for it to become an adequate therapeutical procedure for our patients it is of upmost importance we make a radiographic examinative so that we may juntify our diagnosis in that refers to facial skeletal disharmonies, specially in horizontal maxilary discrepancies.

Humans↗
PubMedDate not supplied

[Thumbsucking and malocclusion--presentation of a clinical case].

The digital sucking habit have been significantly related with the malocclusions. These problems can be observed as in the deciduous and mixed as in the permanent dentition. Frequency, length, and intensity of the habit generate as a consequence: anterior open bite, retrusion of the mandible, protrusion of the maxilla, excessive overjet, labial version of the upper incisors, uprighting of the lower incisors, posterior cross bites, sometimes associated to a ogival palate, diastema between the upper incisors, and any others facial characteristics. According to various authors, when the habit persist for an extended period after the age of four years, is considered how malocclusion cause. In this case is requered the professional interference. The presentation of this study has the objective to show the clinic conduct for preventive orthodontics in face to cases who exhib harmful habits.

Child, Preschool↗
PubMedDate not supplied

[Root resorption: preliminary considerations and case report].

This article presents a review of the literature on the action of 5 (five) possible predisponent agents of root resorption (treatment time, amount of dental movement, amount of force used, individual susceptibility and trauma) during orthodontic treatment and describes a clinical case with pronounced overjet and overbite where, the presence of resorption in one traumatized tooth limited the mechanics to light forces only.

Child↗