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PubMed1985

The nasopharynx, face height, and overbite.

In lateral cephalometric films of a group of male subjects, none of whom was a mouth breather, the statistical relationships between overbite and nasopharyngeal dimensions were weak. Moderate relationships were found between face height and nasopharyngeal dimensions. Strongest correlations, with a peak at 10 years, were between--Face height and nasopharyngeal height (+) Face height and nasopharyngeal area (+) Face height and roof angle (-) Dynamic correlations between overbite, face height and nasopharyngeal dimensions were weak. Class II malocclusion subjects on average showed--Smaller Nasopharyngeal and Adenoid Areas. Larger Airways in both real and proportional terms, compared with Class I and normal occlusion subjects.

Adolescent↗
PubMed1991

The effect of Andresen, Harvold, and Begg treatment on overbite and molar eruption.

A retrospective cephalometric study was carried out to compare the vertical dental changes between patients treated with the Andresen (30), Harvold (19), or Begg (30) appliances, and an untreated control group (24). It was found that all three appliances successfully reduced the overbite although the reduction tended to be more stable with the functional appliances. Overbite was reduced by a combination of factors which varied according to the appliance used, but included lower incisor intrusion or restraint, molar eruption, vertical growth of the face and lower incisor proclination in the functional groups. Relapse appeared to be primarily due to continued lower incisor eruption, retroclination of these teeth, and forward rotation of the mandible with continued growth.

Activator Appliances↗
PubMed2001

[Orthodontic treatment of overbite by the Tip Edge technique in conjunction with an anterior bite elevator. Part 1].

In orthodontics, incisor overbite has always been considered as an anomaly difficult to correct but also as the one most hindering the solving of the problems resulting from other associated malpositions. The recent concept of unlocking, introduced by the bioprogressive School, proves that the profession has become aware of its importance in any orthodontic treatment plan. Due to the fact that overbite also hinders the setting up of inferior brackets or forces the practitioner to bond them in a position liable to burden the parodontal health of the lower incisors has therefore induced the author to put in place, at the beginning of the treatment with the Tip-Edge technique, an anterior bite raiser thus generating space in the lateral sectors. Considering how fast the anterior problem is solved once the occlusion is lifted, the bite raiser can be suppressed within three months. Another advantage resides in the possible adjunction of an expansion screw also aimed at unlocking the occlusion in transverse direction. The question then raised in to know whether that approach which ought to be compared to the one of the functional appliances is not the ideal solution to unlock the occlusion in the three dimensions of space when the use of fixed appliances alone might be unsuitable or too slow, regarding current therapeutic aims. Attributing that spectacular therapeutic result to an incisor intrusion or a molar extrusion is of little interest as far as those alterations do not lead to an increase of the vertical dimension of the lower portion of the face. A cephalometric study, published concomitantly, has evidenced that the use of an anterior bite raiser together with the Tip-Edge technique only leads to perfectly similar alterations to those observed with the Ricketts bioprogressive technique or the Schudy edgewise technique, without the help of a bite raiser. From now on, integrating the bite raiser in our therapeutic armamentarium in conjunction with fixed techniques is highly recommended.

Cephalometry↗
PubMed2001

[Orthodontic treatment of overbite with an appliance for raising the anterior vertical dimension. Part 2].

If incisor overbite in the matter of orthodontic treatment entails difficulties with the appliances due to excessive overbite of the incisors, involving an anterior bite raiser to enable the unlocking of the occlusion and the bonding of the brackets on the anterior mandibular teeth poses the problem of the vertical behavior of the masticatory apparatus during treatment. A profile teleradiograph was therefore taken at the beginning of treatment and again once the occlusion had been lifted due to the presence of the bite raiser and within a period of three months. The sample was separated in two groups according to the value of FMA; a first group was composed of 44 cases exhibiting an FMA angle inferior to 25 degrees therefore similar to the cases analyzed by Dake and Sinclair in 1989, called "reference group" and a group of cases exhibiting an FMA angle superior to 25 degrees. The aim of this study is indeed to confront, as regards vertical behavior, the therapeutic approach of the authors with the one studied by Dake and Sinclair dealing with cases treated with Ricketts and Tweed technique (Schudy modified). Following Dake and Sinclair's approach, the authors managed to find out in cases with FMA inferior to 25 degrees that the vertical alterations in the study group were not different from those in the reference group. This means that in spite of the presence of an anterior bite raiser the mandibular plane angle had only increased by 1.8 degree, compared to 1.8 degree for the Ricketts group and 1.1 degree for the Tweed/Schudy group. As for the study sample with an FMA angle superior to 25 degrees, the vertical alterations in the study group show an increase of the angle of the mandibular plane equal to 1.2 degree, here again the increase is similar to the one observed in the reference group. It can thus be concluded that the use of an anterior bite raiser in conjunction with the Tip-Edge technique is not only advisable but strongly recommended both to unlock the occlusion but also to enable bracket bonding at the very beginning of treatment.

Cephalometry↗
PubMed1990

[Good results using maxillary tongue guard for Class III patients with comparatively shallow overbite].

A maxillary tongue guard was used in conjunction with a chin-cap for the treatment of shallow overbite. Correction of the overbite proved to be very rapid. Follow-up treatment also proceeded very smoothly. The tongue guard has been designed to cure the habit of tongue-thrusting, to prevent tongue retraction and lifting of the tongue posture, and to relieve the tongue pressure against the lower anterior teeth, so that the tongue pressure is communicated to the upper dentition and maxilla. The following results were observed. 1. Lower lip pressure caused lingual movement of the mandibular anterior teeth, while elimination of tongue pressure lengthened to mandibular anteriors. 2. Retraction of the tongue posture and hyoid bone resulted in the retraction of the mandible. 3. Communication of tongue pressure resulted in mesial movement of the maxillary dentition and stimulated the growth of the maxilla.

Adolescent↗
PubMed1989

[Effect of Begg technique therapy in cases with excess overbite].

In this study, the effect of Begg technique therapy was investigated in cases with excess overbite. The sample consisted of 20 cephalometric films of 10 individuals who passed their active growth period. 20 parameters were measured on every lateral cephalometric film. Differences according to treatment were compared by paired t-test. As a result, the elimination of overbite seemed to be related to dentoalveolar factors.

Cephalometry↗
PubMedDate not supplied

[Frequency of overjet, overbite and open bite in the deciduous dentition].

The authors studied the frequency of overjet, overbite and open bite in deciduous dentition in one hundred and twenty Brasilian white children, of both sexes, aged between 2 and 6 years old. The results showed that the deciduous dentition of that children was characterized for a moderate overjet and a light overbite and that overjet and open bite degree decrease with the increasing of the children's age.

Brazil↗
PubMed1993

Partial dentures incorporating onlays in the treatment of a complete anterior overbite.

Incorporating onlays onto partial dentures, that is occlusal or incisal rests extended to cover the entire occlusal or incisal edges, can be used successfully to treat overbite. This case study describes its use in a patient with a complete anterior overbite together with severe tilting of some of the maxillary molar teeth. Early tooth loss, which had not been restored, was probably a significant aetiological factor in the patient's condition.

Dental Occlusion, Traumatic↗
PubMed2000

Axiographic evaluation of mandibular mobility in children with angle Class-II/2 malocclusion (deep overbite).

Correction of the occlusion in Angle Class-II/2 patients is often more complicated and tedious than in Class-II/1 cases. Reasons given are the more comprehensive remodeling and functional adaptation processes of the temporomandibular joints (TMJ) since the articular tuberculum is more strongly developed in deep overbite, and a deep bite leading to a locked occlusion is dominant due to the steeper condylar path. Both characteristics are, however, considered to be the consequence of pronounced incisor retrusion. The present study covered 28 untreated Class-II/2 patients aged 8 to 12 years in whom functional TMJ adaptation to the retroclined maxillary incisors was studied with the help of electronic, 3D axiographic registrations of mandibular movements. Comparison with eugnathic age peers revealed increased mobility in mandibular protrusion and a somewhat steeper condylar path, although the latter was less pronounced than in adult patients. The results corroborate the concept of functional TMJ adaptation to incisor inclination and speak for early uprighting of maxillary incisors.

Adaptation, Physiological↗
PubMed1977

Deep overbite correction by intrusion.

Not all patients with deep overbite should be treated with the same mechanics. Some patients require intrusion of the anterior teeth, while others require primarily extrusion. This article has discussed the principles of incisor and canine intrusion and has demonstrated the use of intrusion springs that are capable of intruding incisors with minimal side effects on the posterior teeth. Six principles must be considered in incisor or canine intrusion: (1) the use of optimal magnitudes of force and the delivery of this force constantly with low-load-deflection springs; (2) the use of a single point contact in the anterior region; (3) the careful selection of the point of force application with respect to the center of resistance of the teeth to be intruded; (4) selective intrusion based on anterior tooth geometry; (5) control over the reactive units by formation of a posterior anchorage unit; and (6) inhibition of eruption of the posterior teeth and avoidance of undesirable eruptive mechanics.

Cuspid↗
PubMed1989

Correction of deep overbite. A modified splint permitting rapid extrusion of posterior teeth.

The use of a modified splint in the surgical-orthodontic treatment of Class II deep overbite deformities is presented. The splint permits a reduction of the preoperative orthodontic treatment-time because hardly any (time consuming) levelling of the dental arch is indicated while the time of postoperative orthodontic treatment is shortened, because of the possibility of continuing orthodontic treatment during the intermaxillary fixation period. The clockwise rotational movement which occurs with this treatment modality has, additionally, a favourable effect on the anterior facial height and in many cases on the position of the chin. Finally the intake of food during the immobilization period is facilitated.

Humans↗
PubMed1990

The deep overbite: prevention of trauma.

An understanding of the mechanisms by which deep overbite trauma develops will allow interception at an early age of those cases most at risk. Measures may then be taken to prevent progression to the stage where treatment becomes difficult.

Dental Occlusion, Traumatic↗
PubMed1985

Effects of the degree of overbite and overjet on dental health.

The purpose of the study was to examine whether any combination of vertical overbite (OB) and horizontal overjet (OJ) may be more favourable than others to dental health in anterior segments. The study group consisted of 74 females and 70 males. The participants were 15-years-old and had 6 anterior teeth in both jaws. The following parameters were assessed: plaque index, gingival index, probing depth, space index, filled surfaces, the number of non-aligned proximal tooth surfaces (NONAS) and the OB/OJ ratio. The results demonstrated that participants with a relatively high OB/OJ ratio (OB/OJ greater than or equal to 1.21) had a more favourable periodontal condition than participants with lower ratios. This was so in both sexes and both jaws. The OB/OJ ratio had little relation to the prevalence of filled surfaces.

Adolescent↗
PubMed1998

[Clinical study on the orthodontic treatment of deep overbite with bite plane].

Fifteen cases of patients with incisal Angel's Class II obserbite were orthodontically treated with bite plane and analysed with cephalometric radiograph. The results showed that bite plane can correct deep overbite rapidly (within 6 months) and effectively. The mechanism of bite plane was to raise the posterior teeth (1.1 mm) and to lower the anterior teeth (0.8 mm).

Adolescent↗
PubMed2001

[Prosthodontic correction of severe deep vertical overbite combined with dimensional discrepancy of the upper and lower dental arch. 31 years follow-up].

Sz. S. a 39-years-old patient was referred to our department in 1968. Patient's masticatory dysfunction, orofacial pain syndrome and substantial weight loss was due to a combined genuine and acquired deep vertical overbite aggravated by a marked difference between the size of the lower and upper jaw bones. The premolars and molars had already been extracted. The lower incisors bit onto the palatal gingiva in centric occlusion causing direct mechanical irritation on the palate. Consequently the centric occlusion position of the mandible was only defined by the contact between the lower central incisors and the palatal soft tissue. According to the literature this kind of defect can only be corrected by a combined surgical prosthodontic therapy (increasing the mandibular arch by vertical osteotomy combined with bone grafting followed by complex prosthodontic reconstruction). Because patient refused any kind of surgical treatment a special upper full arch bridge was constructed with an extended occlusal surface on the palatal surfaces of the front crowns to provide full occlusal contact for the mandibular anterior teeth. The OVD was raised by 11 mm. The present paper reports the history of a 31 years long prosthodontic treatment and patient's follow up. It is shown how the correct centric occlusion, the masticatory functions, the phonetics and also the esthetics could have been maintained by a series of gradually changing fixed restorations meeting the demands imposed by the continuing tooth loss.

Adult↗
PubMed1991

Longitudinal study of combined orthodontic and surgical treatment of Class II malocclusion with deep overbite.

Twenty-one patients who had undergone orthodontic treatment in combination with mandibular advancement surgery to treat Class II malocclusion and deep overbite were followed up. Median vertical relapse at the bony chin (after a mean followup of 16 months) was found to be 2.9 mm (44%). Sagittal advancement was found to have good stability; most of the patients exhibited some additional anterior movement of the chin during the follow-up period. At the same time, the entire mandible rotated counterclockwise and the gonial angle increased. Individual response to treatment varied greatly; two patients exhibited major horizontal relapse. Controlling the position of the mandibular proximal segment seemed to be the most important factor in posttreatment stability of this sample.

Adolescent↗