Periodontics › Foundations
Defence Mechanisms of the Gingiva
High-yield revision notes with linked practice questions, written for dental students and candidates preparing for the ADC and other licensing examinations.
High-yield notes
Gingival crevicular fluid is measured using Whatman's filter paper
Method introduced by brill for collection GCF is by using Absorbing paper strips
Electronic instrument used to measure gingival crevicular fluid is Periotron
The gingival crevicular fluid is not increased in Trauma from occlusion
Smoking causes Transient increase in GCF flow
The predominant immunoglobulin in sulcular fluid is IgG where as in saliva it is IgA.
GCF flow per day is 0.5-2.4ml
GCF flow in normal 3µl/hrs
GCF flow in periodontitis reaches up to 44 µl/ hrs
Normal PH of GCF is 6.5-6.9
Glucose level is 3-4 times more than serum level
Protein content is less than serum level
Concentration of tetracycline GCF is 2-10 times.
----------------------------------------------------------------------- Basis GCF Serum
----------------------- ----------------------- ----------------------- Glucose level 3-4 times higher than Lower than GCF serum
Protein level Much lower higher
PMNs 91.2-91.55% 60-70% of total WBC
Most common lymphocyte B lymphocyte T lymphocyte
T:B ratio of lymphocyte 1:3 (reversed) 3:1
-----------------------------------------------------------------------
Practice questions
Select an option to check your answer. Answers are shown below each question.
Gingival crevicular fluid is measured using
- AWhatman's filter paper b. pH paper
- BMylar strip d. Litmus paper
- Cgingivitis b. Smoking
- DPeriodontal pocket d. trauma from occlusion
Glucose levels in gingival crevicular fluid is
- Aequal to glucose level in serum
- BZero
- C3-4times greater than serum
- DMore than 10 times the serum levels
Approximate amount of gingival fluid projected in 1 day into the oral cavity is
- A1.5-2.5ml per day b.2.5-3.5ml per day
- B0.5-2.4ml per day d.0.5-4.2ml per day
- CTetracycline b. Metronidazole
- DBoth d. None
Which of the following is not secreted in GCF
- ASpiramycin
- BErythromycin
- CTetracycline
- DMetronidazole
Which of the following leukocytes is not found in crevicluar fluid?
- APMN
- BMacrophage
- CLymphocyte
- Dbasophil
These notes are compiled from standard periodontology texts for study purposes. They are a revision aid, not a substitute for your own reading or current clinical guidelines. If you spot an error, please leave a comment.