Discussion Apical surgery belongs to the field of endodontic surgery that also includes incision and drainage, closure of perforations, and root or tooth resections. The objective of apical surgery is to surgically maintain a tooth that has an endodontic lesion which cannot be resolved by conventional endodontic (re-) treatment. This goal should be achieved by root-end resection, root-end cavity preparation, and a bacteria-tight closure of the root-canal system.
Indications:1. Need for
surgical drainage 2. Failed nonsurgical endodontic treatment
- Irretrievable root canal filling material
- Irretrievable intra-radicular post
3. Calcific metamorphosis of the pulp space 4. Procedural errors
- Instrument fragmentation
- Non-negotiable ledging
- Root perforation
- Symptomatic overfilling
5. Anatomic variations
- Root dilaceration
- Apical root fenestration
6. Biopsy 7. Corrective surgery
- Root resorptive defects
- Root caries
- Root resection
- Hemisection
- Bicuspidization
8. Replacement surgery A) Replacement surgery
- Intentional replantation (extraction/replantation)
- Post-traumatic
B) Implant surgery
- Endodontic
- Osseointegrated
Contraindication:
- Inadequate periodontal support and active uncontrollable periodontal disease.
- Presence of systemic diseases—leukaemia, uncontrolled diabetes, anaemia, thyrotoxicosis, etc.
- Teeth damaged beyond restoration
- Traumatic occlusion
- Poor root crown ratio
- Acute infection which is nonresponsive to the treatment
- Anatomic structures (e.g., adjacent nerves and vessels)
PROCEDURE:Full mucoperiosteal Incision- The full mucoperiosteal incision is made into the gingival sulcus, extending to the gingival crest. This procedure includes elevation of interdental papilla, free gingival margin, attached gingiva, and alveolar mucosa.
- Two vertical releasing incisions may be used, creating a rectangular design or trapizoidal design.
The full mucoperiosteal design is preferred over the other techniques. The
advantages include maximum access and visibility, not incising over the lesion or bony defect, allowance of root planing and bone contouring, and reduced likelihood of healing with scar formation. The
disadvantagesare that the flap is more difficult to replace and to suture; also, gingival recession can develop if the flap is not reapproximated well, exposing crown margins or cervical root surfaces.
USE OF GRAFT MATERIAL: Bone graft material includes autogenous graft, allograft, xenograft, ceramic/synthetic grafts, bioactive proteins, combination graft. Platelet rich fibrin can be used as an autologous biomaterial after an endodontic surgery. This is second generation platelet concentrate. It was first developed in France by
Choukroun et al. in 2001. This is widely used in stimulation and acceleration of soft tissue and bone healing because of local and continuous delivery of growth factors and proteins, mimicking the needs of the physiological wound healing and reparative tissue processes. The growth factors which are released from activated platelets are:
- Platelet derived growth factor(PDGF)
- Transforming growth factors beta 1 and beta 2 (TGF 2. β 1 & 2)
- Vascular Endothelial Growth Factor (VEGF
- Platelet derived endothelial cell growth factor
- Interleukin – 1 (IL-1), Basic fibroblast growth factor (bFGF)
- Platelet activating factor -4 (PAF-4) .
Singh et al in 2013 conducted a study in which 15 cases were presented with conventional endodontic therapy failure in resolving the problem and periapical root – end surgery was required. At the end of six months, all patients showed complete bone regeneration. They concluded that the production of a dense, cross – linked, physically robust PRF made of intact platelets and fibrin by high speed centrifugation in the absence of exogenous thrombin, yields an ideal scaffold for use in tissue repair.
Newer Materials: Platelet Rich Fibrin and Nanocrystalline Hydroxyapatite with Collagen Combination. The PRP and Hydroxyapatite combination facilitated better and faster bone regeneration when compared to PRP alone.
Group 1- hydroxyapatite- 1year
Group 2 – prp- 9 months
Group 3- prp +hydroxyapatite- 6 months
CONCLUSION: Apical surgery is now considered a predictable treatment option to save a tooth with apical pathology that cannot be managed by conventional, non-surgical endodontics.
REFERENCES:- Kenneth M. Hargreaves, Stephen Cohen. Cohen’s pathways of the pulp. 10th edition: 2011.
- Chandra BS, Krishna VG. Grossman’s endodontic practice. 12th edition: 2012.
- Singh S, Singh A, Singh R. Application of PRF in surgical management of periapical lesions. Natl J Maxillofac Surg. 2013; 4(1): 94-99.
- Apical surgery: A review of current techniques and outcome. Thomas von Arx. The Saudi Dental Journal (2011) 23, 9–15
- Vaishnavi C, Mohan B, Narayanan L. Treatment of endodontically induced periapical lesions using hydroxyapatite, platelet-rich plasma, and a combination of both: An in vivo study. J Conserv Dent. 2011:14(2);140-144.
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