Usefulness of mandibular third molar coronectomy assessed through clinical evaluation over three years of follow-up

Kohara, Keitaro; Kurita, K.; Kuroiwa, Yoshihiro; Goto, Shigemi; Umemura, Eri

doi:10.1016/j.ijom.2014.10.003

Cited by 38 publications

(55 citation statements)

References 22 publications

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“…However, significant root migration is a continuous physiological process and do not mean failure. The 10.5 mm migration found in case #2 is higher than the average described in the literature [5,11]. However, it was harmless to the patient, since it was asymptomatic and did not require additional surgical procedure.…”

Section: Discussionmentioning

confidence: 58%

“…The intimate relationship between the dental roots of the lower third molars and the IAN can be identified on the panoramic radiograph, and some signs can be spotted: IAN shadow overlapping the roots of the lower third molar; narrowing of the canal and deviation of the canal [4]. Cone-Beam Computed Tomography (CBCT) is indicated to confirm the diagnosis since it allows the analysis of the real positioning of the dental roots to the mandibular canal, making possible to predict the possible risks of complications, such as paresthesia [5].…”

Section: Introductionmentioning

confidence: 99%

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Outcomes after mandibular third molar coronectomy

Moura

Velasques

Barcellos

et al. 2020

RGO, Rev. Gaúch. Odontol.

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Coronectomy is an alternative technique to mandibular third molar removal to avoid inferior alveolar nerve impairment. It is indicated in cases where the dental roots are in close relationship with the nerve which results in a higher risk of damage and paresthesia. The coronectomy technique is considered a safe method to prevent inferior alveolar nerve injury, however it shows particular postoperative outcomes as migration and exposure of the retained roots, and possibility of additional intervention. The aim of this case series is to describe four different outcomes from coronectomy, in patients treated by the same protocol. The outcomes ranged from asymptomatic to migration, infection and root removal. Although the variety of outcomes, none of the patients showed inferior alveolar nerve impairment. Therefore, the main objective of coronectomy was reached.

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Section: Discussionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Outcomes after mandibular third molar coronectomy

Moura

Velasques

Barcellos

et al. 2020

RGO, Rev. Gaúch. Odontol.

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“…Sectioning was performed along the cementoenamel junction using a ssure bur, and the cutting surface was trimmed with a round bur in order to equalize the sectioning level [19]. Finally, after ensuring that the cut margin was at least 3 mm below the alveolar bone level, the wound was thoroughly irrigated with saline and sutured primarily without any pulp treatment [9,11]. Panoramic and periapical radiography and CBCT were performed immediately postoperatively to check the sectioned surface and to record the postoperative position of the remnant roots.…”

Section: Surgical Proceduresmentioning

confidence: 99%

“…This controversial situation has prompted numerous studies, with the results showing that compared to conventional extraction of the mandibular M3, performing a coronectomy in which only the crown of the tooth is removed and the roots are left in place decreases the risk of nerve injury [6][7][8][9]. In addition to the safety and effectiveness of coronectomy, some studies have analyzed the migration of the remnant roots, and found that their migration pattern may be affected by factors such as the patient age, sex, impaction depth, angulation, and eruption status [10][11][12]. However, these studies used only twodimensional (2D) analysis to detect root migration and did not involve removing the remnant roots.…”

Section: Introductionmentioning

confidence: 99%

Factors affecting root migration after coronectomy of the mandibular third molar

Lee

Jung

Park

et al. 2020

Preprint

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Background The purpose of this study was to analyze root migration and its influencing factors at 6 months after coronectomy in both two- and three-dimensions using periapical view and cone-beam computed tomography (CBCT). Methods Thrity-three cases of root remnant after coronectomy were included and analyzed. We measured the amount of migration in CBCT. The following factors that could possibly affect root migration were also analyzed: age, gender, number of mandibular third molar (M3) roots, shape of M3s, Pell and Gregory classification, mesiodistal (MD) angulation, buccolingual (BL) angulation, contact point with the second molar, root curvature, and complete removal of the coronal portion. Results Migration of greater than 2 mm was found in 64% of the roots in the 2D analysis, and the average root migration was 4.11 mm in the 3D analysis. The factors affecting migration were the root morphology, complete removal of the coronal portion, impaction depth, and MD angulation in the 2D analysis, and MD and BL angulation in the 3D analysis. Conclusion In conclusion, complete removal of the coronal portion and ensuring sufficient space for root migration might be important factors after coronectomy of the M3. Clinical relevance Root remnant after coronectomy of M3 may migrate in young patients who has sufficient empty coronal space and this may reduce the nerve damage by the separation of IAN and M3.

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“…-3 meta-analyses [11,12] -4 randomized controlled trials [13,14] -5 nonrandomized controlled trials [6,16] -6 prospective cohort follow-up studies [9,[17][18][19][20][21][22][23][24] -7 retrospective studies [25][26][27] -8 randomized controlled trial without statistical analysis [15].…”

Section: Literature Reviewmentioning

confidence: 99%

Third mandibular molar coronectomy: a way to prevent iatrogenic inferior alveolar nerve injuries—an systematic review

Lenfant¹,

Haese²,

Kimakhe³

et al. 2018

J Oral Med Oral Surg

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Introduction: In the field of oral and maxillo-facial surgery, the avulsion of third mandibular molar is a very common procedure. However, and although the injury on the alveolar inferior nerve is very rare, the neurological risk must not be underestimated. Indeed, it may lower the patient’s quality of life in a significant way. The coronectomy is a technique that allows us to avoid this risk. It consists in remaining in place the third mandibular molar’s roots. Educational objectives: After a clinical introduction to this surgical technique, the main characteristics of this type of procedure will be presented with the help of an exhaustive literature review. Thus, we will refer to the following subjects: the obvious decrease of neurological risks, the potential pre and post-operating complications, the potential necessity of an endodontic treatment for the residual roots, the becoming of these same roots, and finally the bony and mucosal cicatrization of the operated area. Conclusion: Every oral surgeon should have in mind this technique of coronectomy and master it. Indeed, when the case justifies it, the benefits are numerous for the patient.

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Usefulness of mandibular third molar coronectomy assessed through clinical evaluation over three years of follow-up

Cited by 38 publications

References 22 publications

Outcomes after mandibular third molar coronectomy

Outcomes after mandibular third molar coronectomy

Factors affecting root migration after coronectomy of the mandibular third molar

Third mandibular molar coronectomy: a way to prevent iatrogenic inferior alveolar nerve injuries—an systematic review

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