صباح الخير طلاب
هاي الأسئلة العندي عن الكراون والاندو مال امتحانكم اليوم موفقين

Endo

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Lec Tooth mobility ارقام

Crest of alveolar bone located about 1-2 mm shorter than CEJ

Tooth mobility will disappear after 2-3 weeks following periodontal therapy

Width of periodontal ligament space about 0.25 mm by x-ray

Hight of alveolar bone 1mm apical to CEJ

Grade l Tooth mobility ( 0.2-1 ) mm in horizontal direction

Grade ll Tooth mobility > 1 mm in horizontal direction

When applied small forces 100 pounds the crown moved only 0.05 - 0.1 mm

When applied large forces 500 pounds displacement of the crown are :

Incisors 0.1 - 0.12 mm
Canine 0.05 - 0.09 mm
Premolar 0.08 - 0.1 mm
Molar 0.04 - 0.08 mm

Lec laser ارقام

Diode laser wavelength 810/ 940/980 nm

Nd:YAG 1064 laser wavelength nm

Ercr:YAGG laser wavelength 2780 nm

Er:YAG laser wavelength 2940 nm

Co2 laser wavelength 10.000 nm

Tissue treated with laser not re-probed for 3 months

Lec Prognosis ارقام

Crown/Root ratio :

Minimum acceptable ( 1:1 )
Ideal ( 1:2 )
Optimal ( 1:1.5 ) or ( 2:3 )

Cervical enamel projections in mandibular molar 28.6%

Cervical enamel projections in maxillary molar 17%

Fair prognosis 25% attachment loss
Poor prognosis 50% attachment loss
Ouestionable prognosis > 50% attachment loss