Paresthesia Case Study: Diagnosis and Management

Paresthesia Case instruct Diagnosis and ManagementABSTRACTParasthesia is defined as a centripetal hinderance with clinical manifestations such as burning, prickling, tingling, numbness, it get upg or either disagreement from normal sensation1. Paresthesia of the low alveolar nitty-gritty provide number during various dental Procedures like local anesthetic injections, ternary molar surgery, orthognathic surgery, Ablative surgery, Implants, and endodontics. This case report highlights a commonly occurring and lots reported problem of Paresthesia involving the Mental Nerve during endodontic interposition. around of the previous case reports have utilize radiographs for the diagnosing and forethought of these cases. Since the radiographic image is a 2 dimensional image it has its limitation patch a 3 dimensional imaging modality like a cone beam computed tomography (CBCT) provides the clinician with surplus information which potbelly be critical in the management o f cases. The exact 3 dimensional localisation principle of the psychological suspension in relation to the prime of the concerned tooth dejection be substantiate using CBCT scans, helping make more advised diagnosis and preaching plans. This case was successfully managed using CBCT images for guidance during the nail down canal treatment.INTRODUCTIONParasthesia is defined as a sensory disturbance with clinical manifestations such as burning, prickling, tingling, numbness, itching or any deviation from normal sensation1. Paresthesia of the Inferior Alveolar Nerve and its branches can occur during various dental Procedures like Local Anesthetic Injections, Third wedge Surgery, Orthognathic Surgery, Ablative Surgery, Implants, and endodontics2, 3.Damage to racy structures in the head and neck electron orbit during dental treatment is always a vexing prospect for the clinician. During Endodontic Treatment precautions have to be taken against this, as there is a possibility of injury to a vital structure with the instruments or chemicals organism applyd and also a chance of depositing infected material with their byproducts from the tooth into these areas cause a subsequent immunological response from the body. Today we are competent to use 3 Dimensional imaging to locate and respond to such situations much more hardly than ever before4,5.This case highlights a commonly occurring and often reported problem of Paresthesia involving the Mental Nerve during endodontic treatment6.7 which was managed using a CBCT to offer the patient a predictable treatment. just ab unwrap of the previous case reports have used OPGS and Intra oral periapical radiographs for the diagnosis and management of these cases. Since these are 2 dimensional imaging techniques they have their limitations. cone shape Beam Computed Tomography (CBCT) is 3 dimensional imaging modality which provides the clinician with additional information which can prove to be critical in the managem ent of such cases.CASE REPORTA 32 Year nonagenarian female patient was referred to the Department of Conservative Dentistry with the chief mission of a dislodged temporary restoration in a tooth undergoing endodontic treatment at a private dental clinic. Patient gave a fib of Root canal treatment having been started 2 weeks back. Clinical Examination revealed an clear access opening and extreme tenderness to percussion. Radiographic evaluation confirmed the history presented by the patient (Fig 1). A differential diagnosis of Periapical granuloma/ Periapical Abscess was preserve and the patient was advised to complete the Root canal treatment.In the commencement exercise appointment the access opening was refined under local anaesthesia and the pulp tissue remnants were extirpated using a barbed broach watch outed by temporistion.The patient was recalled after 4 days for Root canal instrumentation. In the second appointment local anaesthesia was administered and works lengt h aim was done using an apex locator (Propex 2,Dentsply) followed by confirmation with a radiograph (Fig 1). The working length was kept at 0.5mm short of the radiographic length of the tooth and the group canal instrumentation was carried out. Saline and Sodium Hypochlorite were used to copiously irrigate the root canal space and instrumentation was carried out with the Protaper Rotary system. The root canal was dried and the tooth was temporized for obturation in the pursuit visit. On the next visit 7 days later the patient complained of Parasthesia of the lour lip from the date of the previous visit. On examination there was Parasthesia of the left(a) half of the lower lip and its distribution was consistent with the supply of the psychogenic nerve (Fig 2). A close examination of the IOPA revealed the presence of the cordial suspension directly below the apex of the treated premolar indicating possible perverting effects of the previous procedure causing and periapical in flammation and subsequent hurt to the mental nerve. A CBCT was taken to confirm the exact location of the mental foramen. The CBCT images confirmed the extreme close nature of the mental foramen to the apex of the treated premolar (Fig 3, 4). The distance between the apex of the premolar to the mental foramen was measured to be 0.4mm by using the CBCT software. Taking this into greenback the working length was reset at 1.5 mm short of the radiographic apex. The tooth was then instrumented to the new working length and the canals were irrigated with saline and sodium hypochlorite followed by drying using paper points.The patient was advised that the Parasthesia will gradually mellow out and that the lip will regain normal sensation and was scheduled hebdomadally recall appointments. The Parasthesia was still present at the one week recall appointment until the 6th week after which gradual normalization was observed. At end of two months the Parasthesia had completely disappeared and normal sensation had returned.Endodontic treatment was resumed keeping the new working length. The instrumentation was completed and the tooth was obturated using F3 (Protaper Dentsply) size gutta percha for apical engross and Obtura 2 with System B for back fill using continuous wave of condensation techniqueA one week follow up was done to confirm the absence of any recurrence of the Parasthesia following the obturation. Finally the tooth was restored with a No.1 size fiber post (Angelus Brazil) and crown was placed (Fig 5).DISCUSSIONDental radiographic evaluation is a fundamental lance for endodontic diagnosis. Conventional Intraoral Periapical radiographs are routinely employed during endodontic diagnosis to examine the tooth, identify the pathology and plan the treatment. However, a conventional radiograph is a two dimensional image of a three dimensional quarry and effectly has limitations. Numerous prior studies have demonstrated the effective use of CBCT in the ass essment of complex endodontic cases .In cases where location of a vital structure such as the mental foramen or the mandibular canal are concerned the 3 Dimensional imaging capabilities of a CBCT are invaluable. With CBCT and its advanced 3 D reconstruction software, it is possible precisely orient the teeth under treatment with the adjacent anatomic structures crossways a multitude of planes to get measurable values of distance, which help with the consequent predictable treatment plan.In situations of close proximity of a nerve to a tooth which is being endodontically treated various possibilities of damage to the nerve exist. mechanically skillful densification of the nerve, Damage to the nerve due to over instrumentation, Extrusion of necrotic debris and toxic metabolites from the root canal space, overfill or the race of various endodontic materials (root canal irrigants, sealers, and paraformaldehyde containing pastes) into the vicinity of the nerve or its branches.In the p resent case the most probable cause of the Parasthesia could have been an acuate exacerbation of the Periapical infection due to Extrusion of the necrotic debris from the root canal space into the mental foramen space and/or accidental direct mechanical compression of the nerve because of over instrumentation of the tooth during working length determinationDirect peripheral nerve injury has been antecedently classified into three basic types Neurapraxia, Axonotmesis and Neurotmesis 8. Neurapraxia occurs due to a slight compression of the nerve trunk passing in a temporary conduction block. Neurapraxia of the inferior alveolar nerve or mental nerve will normally manifest as a Paresthesia or Dysaesthesia of the lip and chin region 9. Axonotmesis refers to the actual degeneration of the afferent fibers as a result of internal/external irritation resulting in anesthesia 10. Neurotmesis is the complete part of the nerve trunk, resulting in permanent Paresthesia which can only be corre cted by microsurgery and has a more guarded prognosis (8-10). The most likely form of injury in the present case seems to be Neurapraxia due to either periapical infection or direct injury by over-instrumentation/inadvertent passage of the root canal irrigant or both. The tooth responded well to materialistic treatment, and upon completion of the debridement and disinfection of the root canal, the symptoms of periapical infection subsided and Paresthesia started to diminish.CONCLUSIONSThe lower mandibular premolars rattling frequently are in close approximation to the Mental foramen and the Mandibular canal. The pre-operative radiograph does provide us with a 2 dimensional image but better more accurate location can be obtained using the CBCT whenever possible. Finally the best method to prevent any damage to the Mental Nerve is to locate it.