Dehiscence
(From juniordentist.com:)
Difference between Fenestration and Dehiscence is:
Fenestration - marginal bone is intact
Dehiscence - Denuded arreas extend through the marginal bone
Common Features:
- Dehiscence and Fenestration occur approximately in 20 % of teeth.
- More common on the facial bone than on the lingual bone.
- More common in the anterior teeth than on the posterior teeth.
- Mostly bilateral
Predisposing factors:
- prominent root contour
- malpositioning of teeth
- labial protrusion of root
- thin bony plate
According to juniordentist.com the cause for Fenestration and Dehiscence is not known and they cannot be identified clinically or radiographically and are only seen during surgery or by probing in the case of dehiscence,
but a slideshare entitled " How does the orthodontist avoid fenestration and dehiscence?" (5) suggests that it can be iatrogen damage and that there are ways by comparing CBCT and Pano images, and palpation, that can
identify occurrences of dehiscence and fenestration.
The frequency of the problem also seems to be up in the air. "Fenestration and dehiscence occur in both the maxilla and mandible and many studies have reported geographical variations with overall prevalence ranging from 0.99% to 53.62% for dehiscence and 0.23% to 69.57% for fenestration observed in the skulls." (4)
Treating dehiscence
1) K. S. Sumanth, B. Savitha, Vijayanti Lotwani, K. Revathi, and Srikanth ReddyJ Indian Prosthodont Soc. 2014 Treating Dehiscence during implant placement and loading on angled abutment in Maxillary Lateral Incisor in the Anterior RegionDec; 14(Suppl 1): 319–322. Published online 2014 Oct 11. doi: 10.1007/s13191-014-0376-9
PMCID: PMC4502023
PMID: 26199539
Case of 24-year old missing lateral incisor. Treated with GBR (Guided bone regeneration) with bone graft and membrane.
2) Moses, Ofer & Pitaru, Sandu & Artzi, Zvi & Nemcovsky, Carlos. (2005). Healing of dehiscence-type defects in implants placed together with different barrier membranes: A comparative clinical study. Clinical oral implants research. 16. 210-9. 10.1111/j.1600-0501.2004.01100.x. Treating Dehiscence During Implant Placement and Loading on Angled Abutment in Maxillary Lateral Incisor Region: A Case Report
3) Frank Bröseler. Treatment of a dehiscence-type defect around a dental implant, Straumann Regenerative Systems
A case study in a product magazine. Treatment of dehiscence-type alveolar bone defect around dental implant
using Straumann®MembraGel, a membran that is applied as a liquid that will solidify within 20-50 seconds.
4) Management of dehiscence and fenestration alveolar defects around incisors using platelet-rich fibrin: Report of two cases. Bains et al. Journal of Interdesciplinary Dentistry. 2015, Vol. 2, Issue:2, Pages 92-96.
5) How does the orthodontist avoid fenestration and dehiscence? A.Baatiah, M. Fouda. Orthodontic Dep., Mansoura University, Egypt. LinkedIn Slideshare.
6) Sarika P.S., Management of Dehiscence During Implant Placement with Sandwich technique: A Case Report.
International Journal of Advanced Research, issn no 2320-5407, pp 178-184.
PMCID: PMC4502023
PMID: 26199539
Case of 24-year old missing lateral incisor. Treated with GBR (Guided bone regeneration) with bone graft and membrane.
2) Moses, Ofer & Pitaru, Sandu & Artzi, Zvi & Nemcovsky, Carlos. (2005). Healing of dehiscence-type defects in implants placed together with different barrier membranes: A comparative clinical study. Clinical oral implants research. 16. 210-9. 10.1111/j.1600-0501.2004.01100.x. Treating Dehiscence During Implant Placement and Loading on Angled Abutment in Maxillary Lateral Incisor Region: A Case Report
3) Frank Bröseler. Treatment of a dehiscence-type defect around a dental implant, Straumann Regenerative Systems
A case study in a product magazine. Treatment of dehiscence-type alveolar bone defect around dental implant
using Straumann®MembraGel, a membran that is applied as a liquid that will solidify within 20-50 seconds.
4) Management of dehiscence and fenestration alveolar defects around incisors using platelet-rich fibrin: Report of two cases. Bains et al. Journal of Interdesciplinary Dentistry. 2015, Vol. 2, Issue:2, Pages 92-96.
5) How does the orthodontist avoid fenestration and dehiscence? A.Baatiah, M. Fouda. Orthodontic Dep., Mansoura University, Egypt. LinkedIn Slideshare.
6) Sarika P.S., Management of Dehiscence During Implant Placement with Sandwich technique: A Case Report.
International Journal of Advanced Research, issn no 2320-5407, pp 178-184.