Pediatric Dentistry and Orthodontics Growth and Development Vocabulary

Vocabulary terms and definitions covering orthodontic and pediatric dental concepts including growth, development, dentition stages, craniofacial growth, and tooth eruption patterns.

Growth

Quantitative increase in size, mass, and dimension of the body.

Development

Qualitative process involving maturation, differentiation, and functional specialization of tissues and organs.

Physiologic spacing

Common and normal spacing (also known as primate spaces) present during the primary dentition stage.

Early mixed dentition

Phase of mixed dentition occurring from 6-8 yrs featuring the eruption of 1st permanent molars, permanent central incisors, and permanent lateral incisors.

Intertransitional period

Relatively stable phase of mixed dentition from 8-10 yrs w/ few eruption changes while jaws continue to grow.

Late mixed dentition

Phase of mixed dentition from 10-12 yrs featuring permanent canines, 1st & 2nd premolars, and 2nd permanent molars beginning to erupt near the end of the stage.

Ugly duckling stage

Temporary spacing of maxillary incisors that may occur as a normal developmental phase during mixed dentition.

Permanent dentition stage

Dentition stage at 12 yrs & older characterized by the presence of 28 permanent teeth before third molars erupt.

Craniofacial Growth

Process by which the bones of the skull (cranium) and face (facial skeleton) increase in size, change in shape, and mature from infancy to adulthood.

Cranium

Component of the craniofacial complex that protects the brain, growing rapidly in early life with most growth completed by 6-7 years of age.

Cranial Base

Foundation of the facial skeleton that grows through cartilage and influences the position of the maxilla and mandible.

Maxilla

Upper jaw structure that develops by intramembranous ossification, grows at the sutures, and moves downward and forward because of bone deposition and remodeling.

Mandible

Lower jaw bone that develops by intramembranous ossification, except for the condyle which grows through cartilage (endochondral ossification).

Bone deposition

Formation of new bone by osteoblasts.

Bone resorption

Removal of bone by osteoclasts.

Bone remodeling

Simultaneous deposition and resorption that changes the shape and position of bones.

Bone displacement

Movement of bones as they grow and surrounding structures enlarge.

Eruption pattern

The normal sequence, timing, and path which teeth emerge from the alveolar bone into the oral cavity and reach their functional position in the dental arch.

Eruption path

The direction in which teeth should erupt vertically into their proper position within the dental arch.

Delayed eruption

Abnormal eruption path clinical problem where a tooth erupts significantly later than expected.

Ectopic eruption

Abnormal eruption path clinical problem where a tooth erupts in an abnormal position.

Impacted tooth

Tooth that fails to erupt because it's blocked by bone, soft tissue, or another tooth.

Premature eruption

Condition where a tooth erupts earlier than the expected age.