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Results for “Maxillofacial Development”

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At least 577 records · Page 32Linked to original sources
PubMed1983

Craniofacial growth in young marmosets (Callithrix jacchus).

A cross-sectional study of craniofacial growth in young marmosets was performed. Selected linear craniofacial measurements were obtained from groups of 5 animals of each sex at 3 monthly intervals from birth to 1 year. These data provide a baseline for comparison with other colonies and in the assessment of teratogens on craniofacial development.

Aging↗
PubMed1995

Homeobox genes and growth factors in regulation of craniofacial and tooth morphogenesis.

Homeobox genes encode a special group of transcription factors that regulate gene expression in the developing embryo. The so-called Hox-cluster genes were first discovered in the Drosophila (fruit fly). They specify the identity of body segments and their patterning along the anteroposterior axis. Other homeobox-containing genes appear to regulate patterning of the head and face. The function of the Msx-1 homeobox gene has been shown to be necessary for tooth development. In general, it is thought that special combinations of homeobox genes specify the patterning of individual structures. Bone morphogenetic proteins (BMPs) are growth factors belonging to the family of transforming growth factor-beta (TGF-beta). BMPs regulate bone and cartilage development, and individual BMPs have been shown to contribute to the shaping of various skeletal elements. BMPs regulate bone and dentin formation also postnatally, and they have therapeutic potential in reparative osteogenesis and odontogenesis. BMPs also act as inductive signals between tissue layers in the embryo, and they regulate the expression of several transcription factors, including homeobox-containing genes. BMP-4 has been identified as an epithelial inductive signal in tooth development. As it is produced by early dental epithelium and regulates tooth-specific gene expression in the dental mesenchyme, including Msx-1 expression, it may be an important signal for the initiation of tooth development.

Animals↗
PubMed1976

Nutrition in growth and development of oral tissues.

The development of teeth, salivary glands, and other oral tissues can be seriously compromised by a deficiency of a number of essential nutrients. Because nutritional stress during critical development periods may decrease the ultimate resistance of the oral tissues to challenge, the prevention of disease and maintenance of oral health are intimately dependent on the nutrient supply during development. Appropriate dietary counseling, particularly with reference to critical developmental times and intake of essential nutrients, can insure optimal oral tissue development.

Calcium↗
PubMed1977

[Biodevelopmental and biostatistical aspects of the concept of normal values in the 1st and 2d dentition].

In conformity with the practice in other biological sciences, it is suggested to adopt in dentition chronology the double of the range around the mean as the range of normal. The great variance especially in the second dentition agrees with the variance of other developmental characteristics and must be considered to be typical of human development. The integration of dentition with the complex of the characteristics of physical and psychical development is advocated.

Child↗
PubMed2005

Mandibular pubertal growth spurt prediction. Part one: Method based on the hand-wrist radiographs.

Many orthodontic treatment modalities will yield a better result in less time if properly correlated with the unique facial growth patterns of the patients. The pubertal growth spurt depends on gender and varies in relationship to the chronologic age. General skeletal maturity usually is used as an indicator to predict timing of mandibular growth velocity peak. Hand-wrist radiographic evaluation is one of the diagnostic tools currently available to determine whether the pubertal growth has started, is occurring or has finished. The overview of topic related literature and skeletal maturity assessment (SMA) system developed by L. Fishman are presented. The SMA system is based on eleven discrete adolescence skeletal maturational indicators of hand-wrist bones, covering the entire period of adolescent development. Maturational stage and level demonstrated close correlation with maxillary and mandibular growth velocity, amount of incremental growth and timing. Clinical indications for the use of hand-wrist radiographs to assess skeletal maturity are provided.

Adolescent↗
PubMed1991

Inter-relationship between dental, skeletal and chronological ages in well-nourished and mal-nourished children.

Dental casts, wrist roentgenograms and full mouth radiographs of teeth of 80 mal-nourished and 40 well-nourished children were evaluated and compared for correlation of dental, skeletal and chronological ages. The findings revealed (1) very high correlation between dental and skeletal ages (r = 0.9584); (2) high correlation of chronological age with dental and skeletal ages (r = 0.8635 and r = 0.8716); (3) out of all the three correlations considered, dental and skeletal ages had the maximum correlation; (4) malnutrition had a significant adverse effect on the skeletal and dental ages. Greater the severity of malnutrition, more pronounced was its effect on the dental and skeletal ages; and (5) no evidence of severity of malocclusion with retarded skeletal and dental ages.

Adolescent↗
PubMed1998

Implant use in growing patients. Treatment planning concerns.

The dynamic relationship of dental and craniofacial development to the use of dental implants in a growing patient must be understood before this treatment is initiated. This article describes the three dimensions of maxillary, mandibular, and skeletal growth and their relationship to the placement of dental implants. Recommendations are made for the use of dental implants in the growing individual predicated on the above parameters of growth and development.

Bone Development↗