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At least 757 records · Page 42Linked to original sources
PubMed1993

Rescue of a "hopeless" second premolar.

We present a case of a young male who was referred to our clinic because of a deep caries on the first lower left molar. The patient refused conservative treatment, and the caries progressed. After 2 years the first lower left molar had to be extracted. During standard x-ray procedures, a deeply impacted second lower left premolar was diagnosed. The boy was followed by our staff, and surgery was performed at proper time to enable eruption of the second lower left premolar. Orthodontic treatment allowed us to bring the element in a suitable position to place a provisional Maryland bridge. At a later stage the missing element (first lower left molar) will be replaced by an osteointegrated implant.

Bicuspid↗
PubMed1994

Dimensions of the denture: back to basics.

The three dimensions of the denture, height, width, and length, allow tooth movements in six directions. The limitation of the tooth movements that can be accomplished is the physical environment of bone, muscle, and soft tissue. By using clinical records of more than 200 cases, each dimension of the denture was analyzed as to lateral, anterior, posterior, and vertical protraction and contraction. A study of 40 successful treatments indicated that posttreatment adjustments reflected contraction of the dentition and that protraction would not be tolerated by the dental environment of patients with normal muscular balance. A total dentition space analysis system was devised to help differentiate proper treatment strategy for all the dimensions of the denture. The space analysis emphasized the point that orthodontics is a space management procedure, and the orthodontist must become skilled in determining the space available, as well as future space increase through growth and development. Finally, guidelines were suggested for space management of all the dimensions of the dentition. These guidelines were based on an anterior, a midarch, and posterior space analysis so that the major areas of disharmony could be identified and proper space management decisions could be made.

Cephalometry↗
PubMed1990

Treatment of Class II malocclusions with removable appliances. 1. Case assessment.

Successful correction of overbite and overjet after orthodontic treatment may be judged in terms of incisor overbite and inter-incisal angle. Removable appliances can produce worthwhile overbite reductions, but the final inter-incisal angle depends upon skeletal pattern. It is vital, therefore, to make an assessment of this factor when planning treatment for a Class II malocclusion.

Cephalometry↗
PubMed2002

Mandibular arch dimensional and positional changes in late mixed-dentition Class I and II treatment.

The purposes of this study were to determine the range of likely mandibular arch dimensional and positional changes that occur with growth when a particular nonextraction treatment approach is used in the late mixed dentition and to search for factors that might affect those changes. The records (pretreatment and posttreatment lateral cephalograms and study casts) of 182 patients with Class I or Class II malocclusion, with or without crowding, were assessed prospectively. Considerable individual variation was found in all measurements, and anteroposterior dimensional arch changes were found to be significantly correlated with the amount of space required for leveling and relief of crowding in the mandibular arch. Despite those relationships, mandibular arch space requirements of 4 to 8 mm were found to be associated, on average, with small anteroposterior and transverse dimensional changes. By starting treatment in the late mixed dentition, it might be possible to control anteroposterior mandibular incisal changes reasonably well, even with considerable space requirements. Transverse mandibular arch changes in this sample were generally greater across the first premolars than across the canines, something previously acknowledged to improve stability after orthodontic treatment. A wide range of variation exists in the amount of available bilateral mandibular E-space; consequently, assessing the relative sizes of the deciduous second molars and their permanent successors in individual orthodontic patients is necessary.

Cephalometry↗
PubMed2005

Is orthodontic treatment without premolar extractions always non-extraction treatment?

While it is common in contemporary orthodontic and orthopaedic treatment to commence treatment for many growing patients during the mixed-dentition, the creation of anterior space, often involving the attempted distalization or holding-back of the upper and lower permanent molar teeth has been shown to commonly result in posterior space deficiencies. Although the extractions of permanent premolar teeth may have been avoided, the developing second and third permanent molars are often affected, so that third molar impaction results in many cases. This is not to say that orthodontic treatment carried-out without premolar extractions is not ideal in many cases, but on the available evidence, so-called absolute 'non-extraction' protocols should be questioned, so that both the dental profession and the public at large are not misled.

Bicuspid↗
PubMedDate not supplied

[Dental and skeletal malformations: 434 cases of II and III dental skeletal class. Our experience and review of the literature].

BACKGROUND: This study tests the patients who underwent to orthognatic surgery to compare the perioperatory treatment and the results with what related by international bibliography. METHODS: We have made a retrospective analysis on 434 patients affected by dentalskeletal malformations and surgically treated at the Department of Maxillo-Facial Surgery of the University of Rome "La Sapienza", from 1-1-1988 to 31-12-1997. We have examined these data: clinical evaluation of patient, pre and post-surgical orthodontic treatment, minimum age for surgical correction, surgical technique, use of osseus-synthesis with wire or RIF for mobile segment osseus stabilization, use of reference articular plaque and the possible association of additional surgical technique during the same time of maxillomandibular correction. We have made in all patients orthognatic surgery, which consist in osteotomy Le Fort I for upper jaw and sagittal osteotomy for mandible. RESULTS: In 25 patients was necessary remove the plaques and the screws which have made an infection. In 15 patients we have executed a subsequent operation for relapse of the dentalskeletal malformation. In other patients we have got a good functional and aesthetical result. CONCLUSIONS: From our study result that an exact presurgical analysis and a correct orthodontic-surgical treatment have permitted to obtain a good functional and aesthetical result in all patients.

Abnormalities, Multiple↗