Study Cast Analysis Lac for 4th level1 .pptx

Study cast analysis

1. Study Cast Analysis Dr . Azzam Sadeq Aljapri

2. Study casts are the essential diagnostic aids. They provide a 3-D view of the maxillary and mandibular dental arches

3. What is Study Cast Analysis ? Involves the study of maxillary and mandibular dental arches in all the three planes of space Valuable tool in orthodontic diagnosis and treatment planning

4. Proper alignment of the teeth requires harmony between the tooth sizes and the space required within the dental arch. Sometimes the space available is not similar to the space required for the alignment of the teeth.

5. Space available = the length of the arch Space required = the total of the mesio distal width of teeth If space available = space required , then the arch is well aligned If the “space available” is less than “space required” , then the arch is crowded If the “space available” is more than “space required” , then the arch is spaced Spaced dentition

6. It is thus important for the clinician to determine prior to the onset of the orthodontic treatment the space requirements necessary for favorable results. To accomplish this, a space (study cast) analysis must be done.

7. Measurements : 1. ARCH LENGTH = ARCH PERIMETER = ARCH CIRCUMFERENCE 2. MESIO-DISTAL WIDTH OF TEETH S 1 S 2 S 3 S 4 Arch length = S 1 + S 2 + S 3 + S 4 OR Length of the brass wire

8. 3. ARCH WIDTH Inter premolar width Inter molar width

9. Permanent Dentition study cast analysis 1 . Carey’s Analysis / Arch Perimeter Analysis 2. Pont’s Analysis 3. Ashley Howe’s Analysis 4. Bolton Tooth Size Analysis (Ratio)

10. Mixed Dentition space Analysis To evaluate the amount of space available in the arch for the erupting permanent canines and premolars Mixed Dentition