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61. Space maintenance in the primary dentition
Hany Niazy, F. Salama,
College of Dentistry, King Saud University, P. O. Box 60169, Riyadh 11545, Saudi Arabia.
The harmful effects of premature loss of one or more primary teeth vary in patients of the same age and stage of the dentition. As a general rule, when a primary molar is extracted or prematurely lost, the teeth both mesial and distal to it tend to drift or be forced into the resulting space. Other factors that could influence the development of a malocclusion include presence of oral habits, abnormal oral musculature, existence of a malocclusion and the stage of the developing dentition.
The purpose of this table clinic is to present an overview about planning for space maintenance in children. This will include indications, contraindications and types of space maintainers for the first and second primary molar area. Models for the following space maintainers will be presented: band and loop, lingual holding arch, distal shoe and removable partial dentures. In addition, the technique of fabrication and construction will be described.
Saudi Dental Journal 1992;4(SI)-Abstr.61:p62.
62. The orthodontic management of anterior open bite with spacing of the labial segments
Mirghani A.Yousif,
Dental Department, EINoor Specialist Hospital, P.O. Box 6251, Makkah, Saudi Arabia.
The openbite malocclusion is one of the more complicated problems in Orthodontics. It is difficult to treat and has a high incidence of relapse. In this table clinic, the condensed clinical case histories of six patients of both types of malocclusions will be presented in the form of:
- A brief and concise summary of each case's notes including the summary of diagnosis and treatment steps.
- Records including radiographs
-a. lateral skull radiographs with the tracings before and after treatment,
-b. OPG before and after treatment
- Photographs of the face and dentition before and after treatment.
- Study models before and after treatment.
Saudi Dental Journal 1992;4(SI)-Abstr.62:p63.
63. Morphology, treatment, and retention of class II division II malocclusions
Merley Newman,
Department of Preventive Dental Sciences, College of Dentistry, King Saud University, P. O. Box 60169, Riyadh 11545, Saudi Arabia.
The severe Class I! Division II malocclusion is one of the malocclusions that is most difficult to treat and achieve a stable result.
The morphology of different Class II Division II malocclusions seen in the College of Dentistry, King Saud University is presented. The rationale of treatment is discussed and pre-treatment and post-treatment results are evaluated.
Saudi Dental Journal 1992;4(SI)-Abstr.63:p64.
64. Oral hygiene status of blind females in Riyadh, Saudi Arabia.
A. AIRwaitea BDS, N. Al Hammad BDS, S. AlBawardi BDS, H. Abdullatif BDS, MSD,
PDS Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
This cross-sectional study was conducted to provide an assessment of the oral hygiene status of the blind population in Riyadh, Saudi Arabia. A convenient sample of 74 female students from the blind institution in Riyadh, between the ages 6 and 24 years were examined. The oral hygiene status of the subjects was assessed using the plaque index (PLI), gingival index (G.I.) and retention index (R.I.).
The results of the study showed considerable low mean values for both PLI (1.4) and G.I. (1). The three components of R.I. were assessed separately, Caries index (Ca.l.) (2.03), Calculus index (CI.I.) (2.4), and filling index (F.I.) (0.27).
It was concluded that the oral hygiene status of the group under the study was considered good regarding their handicappy situation. Furthermore, this preliminary study indicated under utilization of dental services by the handicapped.
Saudi Dental Journal 1992;4(SI)-Abstr.64:p65.
65. Three-dimensional modelling using computed tomography in maxillofacial surgery. a case report
Hassan Abed, R. Sadrian, R. Ord,
ARAMCO Dental Department, Dhahran, Saudi Arabia.
Three-dimensional imaging is a new digital technology that utilizes a series of conventional, two-dimensional computed tomography (CT) scans to produce accurate "life like" three-dimensional images of complex "normal, traumatically defective and pathologically affected" anatomical structures.
Those images are viewed on a high resolution video monitor and can be photographed for case records. A computer controlled milling machine can use these data to fabricate accurate models of complex anatomic bony defects of various etiologies and reformative prosthesis for reconstructive surgery. Those prosthesis can be used as alloplastic implants, as a template to fashion autogenous bone grafts or as a model for tissue removal.
The use of this new methodology improves the display of the location and volume of pathology and gives accurate therapeutic and surgical diagnosis and treatment planning of patients' cases undergoing head and neck surgical procedures. The choice and extent of y can be better defined, precise bone removal can be performed, and it leads to increased accuracy in the correction of anatomic defects.
The technique has been used in craniofacial and laryngeal pathology and in preoperative planning of tumor resection, specifically skull base neoplasms. A representative case that demonstrates the use of this technique in maxillofacial surgery, and its benefits in saving
Saudi Dental Journal 1992;4(SI)-Abstr.65:p66.
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