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References

Howe GL, Poyton HG. Prevention of damage to the inferior dental nerve during the extraction of mandibular third molars. Br Dent J. 1960; 109:355-363
Kipp DP, Goldstein BH, Weiss WW. Dysesthesia after mandibular third molar surgery: a retrospective study and analysis of 1,377 surgical procedures. J Am Dent Assoc. 1980; 100:185-192
Rud J. Third molar surgery: relationship of root to mandibular canal and injuries to inferior dental nerve. Tandlaegebladet. 1983; 87:619-631
Smith AC, Barry S, Chiong A Inferior alveolar nerve damage following removal of mandibular third molar teeth. A prospective study using panoramic radiography. Aust Dent J. 1997; 42:149-152
Renton T, Hankinsb M, Sproatec C, McGurkc M. A randomised controlled clinical trial to compare the incidence of injury to the inferior alveolar nerve as a result of coronectomy and removal of mandibular third molars. Br J Oral Maxillofac Surg. 2005; 43:7-12
Pawelzik J, Cohnen M, Willers R, Becker J. A comparison of conventional panoramic radiographs with volumetric computed tomography images in the preoperative assessment of impacted mandibular third molars. J Oral Maxillofac Surg. 2002; 60:979-984
Freisfeld M, Drescher D, Kobe D, Schüller H. Assessment of the space for the lower wisdom teeth. Panoramic radiography in comparison with computed tomography. J Orofac Orthop. 1998; 59:17-28
Knutsson K, Lysell L, Rohlin M. Postoperative status after partial removal of the mandibular third molar. Swed Dent J. 1989; 13:15-22
Rood JP, Shehab BA. The radiological prediction of inferior alveolar nerve injury during third molar surgery. Br J Oral Maxillofac Surg. 1990; 28:20-25
O'Riordan B. Uneasy lies the head that wears a crown. Br J Oral Maxillofac Surg. 1997; 35:209-212
Zola MB. Avoiding anaesthesia by root retention. J Oral Maxillofac Surg. 1992; 50:419-421
Pogrel MA, Lee JS, Muff DF. Coronectomy: a technique to protect the inferior alveolar nerve. J Oral Maxillofac Surg. 2004; 62:1447-1452
Hatano Y, Kurita K, Kuroiwa Y, Yuasa H, Ariji E. Clinical evaluations of coronectomy (intentional partial odontectomy) for mandibular third molars using dental computed tomography: a case-control study. J Oral Maxillofac Surg. 2009; 67:1806-1814
Leung YY, Cheung LK. Safety of coronectomy versus excision of wisdom teeth: a randomized controlled trial. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009; 108:821-827
Poe GS, Johnson DL, Hillebrand DG.Bethesda, Md: National Dental Center; 1971
Johnson DL, Kelly JF, Flinton RJ, Cornell MJ. Histological evaluation of vital root retention. J Oral Surg. 1974; 32:829-833
Whitaker DD, Shankle RJ. A study of the histological reaction of submerged root segments. Oral Surg. 1974; 37:919-935
Plata RL, Kelln EE, Linda L. Intentional retention of vital submerged roots in dogs. Oral Surg. 1976; 42:100-108
Cook RT, Hutchens LH, Burkes EJ. Periodontal osseous defects associated with vitally submerged roots. J Periodontol. 1977; 48:249-260
O'Riordan BC. Coronectomy (intentional partial odontectomy of lower third molars). Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2004; 98:274-280
Pogrel MA. Coronectomy to prevent damage to the inferior alveolar nerve. Alpha Omegan. 2009; 102:61-67
Freedman GL. Intentional partial odontectomy. J Oral Maxillofac Surg. 1997; 55:524-526
Dolanmaz D, Yildirim G, Isik K, Kucuk K, Ozturk A. A preferable technique for protecting the inferior alveolar nerve: coronectomy. J Oral Maxillofac Surg. 2009; 67:1234-1238

Coronectomy of third molar: a reduced risk technique for inferior alveolar nerve damage

From Volume 38, Issue 4, May 2011 | Pages 267-276

Authors

Chkoura Ahmed

Resident in Oral Surgery, Faculty of Dentistry, Rabat, Morocco

Articles by Chkoura Ahmed

El Wady Wafae

Professor and Chief of the Division of Oral Surgery, Faculty of Dentistry, Rabat, Morocco

Articles by El Wady Wafae

Taleb Bouchra

Professor of Oral Surgery, Faculty of Dentistry, Rabat, Morocco

Articles by Taleb Bouchra

Abstract

Causing damage to the inferior alveolar nerve (IAN) when extracting lower third molars is due to the intimate relationship between the nerve and the roots of the teeth. When the proximity radiologic markers between the IAN and the root of the third molars are present, the technique of coronectomy can be proposed as an alternative to extraction to minimize the risk of nerve injury, with minimal complications.

Clinical Relevance: Nerve injury after the extraction of the mandibular third molar is a serious complication. The technique of coronectomy can be proposed to minimize the risk.

Article

Operations on mandibular third molars are common and are complicated by temporary injury to the inferior alveolar nerve in up to 8% and permanent injury in under 1% of cases.1,2 Risk factors include advanced age1 and difficult operating conditions,3 but the most important one is the proximity of the third molar to the mandibular canal.4 Coronectomy (Figure 1) avoids the inferior alveolar nerve by ensuring retention of the roots when they are close to the canal.5 This has been illustrated in Cases 1 (Figures 2–5), 2 (Figures 6, 7) and 3 (Figures 8–11).

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