ICD-10-PCS 0C9 Medical and Surgical: Mouth and Throat Drainage

The ICD-10-PCS root operation Drainage (code 0C9) involves removing fluid and/or relieving pressure by draining from a specific body part. Within the Medical and Surgical section, this operation targets various structures of the Mouth and Throat body system.

This drainage procedure can be performed on numerous anatomical sites including the Upper and Lower Lips, Hard and Soft Palate, Buccal Mucosa, Gingiva, Tongue, Parotid Glands and Ducts, Sublingual and Submaxillary Glands, Minor Salivary Glands, Pharynx, Uvula, Tonsils, Adenoids, Epiglottis, Larynx, Vocal Cords, and Upper and Lower Teeth. Coding distinguishes the approach used such as Open, Percutaneous, Percutaneous Endoscopic, External, Natural or Artificial Opening, and Endoscopic, and whether a drainage device is placed. Additional qualifiers include specifying provision of drainage device or whether the procedure was diagnostic. For example, 0C9000Z assigns drainage of the upper lip with a drainage device via open approach, whereas 0C9M4ZZ indicates drainage of the pharynx via percutaneous endoscopic approach without device placement. These precise codes ensure accurate representation for documentation and billing of drainage procedures in oral and throat care.

List of ICD-10-PCS codes used to specify 0C9 - Drainage (taking or letting out fluids and/or gases from a body part). There are a total of 253 procedure codes in this section.

  • 0C9 - Mouth and Throat, Drainage

  • 0C9000Z - Drainage of Upper Lip with Drainage Device, Open Approach

  • 0C900ZX - Drainage of Upper Lip, Open Approach, Diagnostic

  • 0C900ZZ - Drainage of Upper Lip, Open Approach

  • 0C9030Z - Drainage of Upper Lip with Drainage Device, Percutaneous Approach

  • 0C903ZX - Drainage of Upper Lip, Percutaneous Approach, Diagnostic

  • 0C903ZZ - Drainage of Upper Lip, Percutaneous Approach

  • 0C90X0Z - Drainage of Upper Lip with Drainage Device, External Approach

  • 0C90XZX - Drainage of Upper Lip, External Approach, Diagnostic

  • 0C90XZZ - Drainage of Upper Lip, External Approach

  • 0C9100Z - Drainage of Lower Lip with Drainage Device, Open Approach

  • 0C910ZX - Drainage of Lower Lip, Open Approach, Diagnostic

  • 0C910ZZ - Drainage of Lower Lip, Open Approach

  • 0C9130Z - Drainage of Lower Lip with Drainage Device, Percutaneous Approach

  • 0C913ZX - Drainage of Lower Lip, Percutaneous Approach, Diagnostic

  • 0C913ZZ - Drainage of Lower Lip, Percutaneous Approach

  • 0C91X0Z - Drainage of Lower Lip with Drainage Device, External Approach

  • 0C91XZX - Drainage of Lower Lip, External Approach, Diagnostic

  • 0C91XZZ - Drainage of Lower Lip, External Approach

  • 0C9200Z - Drainage of Hard Palate with Drainage Device, Open Approach

  • 0C920ZX - Drainage of Hard Palate, Open Approach, Diagnostic

  • 0C920ZZ - Drainage of Hard Palate, Open Approach

  • 0C9230Z - Drainage of Hard Palate with Drainage Device, Percutaneous Approach

  • 0C923ZX - Drainage of Hard Palate, Percutaneous Approach, Diagnostic

  • 0C923ZZ - Drainage of Hard Palate, Percutaneous Approach

  • 0C92X0Z - Drainage of Hard Palate with Drainage Device, External Approach

  • 0C92XZX - Drainage of Hard Palate, External Approach, Diagnostic

  • 0C92XZZ - Drainage of Hard Palate, External Approach

  • 0C9300Z - Drainage of Soft Palate with Drainage Device, Open Approach

  • 0C930ZX - Drainage of Soft Palate, Open Approach, Diagnostic

  • 0C930ZZ - Drainage of Soft Palate, Open Approach

  • 0C9330Z - Drainage of Soft Palate with Drainage Device, Percutaneous Approach

  • 0C933ZX - Drainage of Soft Palate, Percutaneous Approach, Diagnostic

  • 0C933ZZ - Drainage of Soft Palate, Percutaneous Approach

  • 0C93X0Z - Drainage of Soft Palate with Drainage Device, External Approach

  • 0C93XZX - Drainage of Soft Palate, External Approach, Diagnostic

  • 0C93XZZ - Drainage of Soft Palate, External Approach

  • 0C9400Z - Drainage of Buccal Mucosa with Drainage Device, Open Approach

  • 0C940ZX - Drainage of Buccal Mucosa, Open Approach, Diagnostic

  • 0C940ZZ - Drainage of Buccal Mucosa, Open Approach

  • 0C9430Z - Drainage of Buccal Mucosa with Drainage Device, Percutaneous Approach

  • 0C943ZX - Drainage of Buccal Mucosa, Percutaneous Approach, Diagnostic

  • 0C943ZZ - Drainage of Buccal Mucosa, Percutaneous Approach

  • 0C94X0Z - Drainage of Buccal Mucosa with Drainage Device, External Approach

  • 0C94XZX - Drainage of Buccal Mucosa, External Approach, Diagnostic

  • 0C94XZZ - Drainage of Buccal Mucosa, External Approach

  • 0C9500Z - Drainage of Upper Gingiva with Drainage Device, Open Approach

  • 0C950ZX - Drainage of Upper Gingiva, Open Approach, Diagnostic

  • 0C950ZZ - Drainage of Upper Gingiva, Open Approach

  • 0C9530Z - Drainage of Upper Gingiva with Drainage Device, Percutaneous Approach

  • 0C953ZX - Drainage of Upper Gingiva, Percutaneous Approach, Diagnostic

  • 0C953ZZ - Drainage of Upper Gingiva, Percutaneous Approach

  • 0C95X0Z - Drainage of Upper Gingiva with Drainage Device, External Approach

  • 0C95XZX - Drainage of Upper Gingiva, External Approach, Diagnostic

  • 0C95XZZ - Drainage of Upper Gingiva, External Approach

  • 0C9600Z - Drainage of Lower Gingiva with Drainage Device, Open Approach

  • 0C960ZX - Drainage of Lower Gingiva, Open Approach, Diagnostic

  • 0C960ZZ - Drainage of Lower Gingiva, Open Approach

  • 0C9630Z - Drainage of Lower Gingiva with Drainage Device, Percutaneous Approach

  • 0C963ZX - Drainage of Lower Gingiva, Percutaneous Approach, Diagnostic

  • 0C963ZZ - Drainage of Lower Gingiva, Percutaneous Approach

  • 0C96X0Z - Drainage of Lower Gingiva with Drainage Device, External Approach

  • 0C96XZX - Drainage of Lower Gingiva, External Approach, Diagnostic

  • 0C96XZZ - Drainage of Lower Gingiva, External Approach

  • 0C9700Z - Drainage of Tongue with Drainage Device, Open Approach

  • 0C970ZX - Drainage of Tongue, Open Approach, Diagnostic

  • 0C970ZZ - Drainage of Tongue, Open Approach

  • 0C9730Z - Drainage of Tongue with Drainage Device, Percutaneous Approach

  • 0C973ZX - Drainage of Tongue, Percutaneous Approach, Diagnostic

  • 0C973ZZ - Drainage of Tongue, Percutaneous Approach

  • 0C97X0Z - Drainage of Tongue with Drainage Device, External Approach

  • 0C97XZX - Drainage of Tongue, External Approach, Diagnostic

  • 0C97XZZ - Drainage of Tongue, External Approach

  • 0C9800Z - Drainage of Right Parotid Gland with Drainage Device, Open Approach

  • 0C980ZX - Drainage of Right Parotid Gland, Open Approach, Diagnostic

  • 0C980ZZ - Drainage of Right Parotid Gland, Open Approach

  • 0C9830Z - Drainage of Right Parotid Gland with Drainage Device, Percutaneous Approach

  • 0C983ZX - Drainage of Right Parotid Gland, Percutaneous Approach, Diagnostic

  • 0C983ZZ - Drainage of Right Parotid Gland, Percutaneous Approach

  • 0C9900Z - Drainage of Left Parotid Gland with Drainage Device, Open Approach

  • 0C990ZX - Drainage of Left Parotid Gland, Open Approach, Diagnostic

  • 0C990ZZ - Drainage of Left Parotid Gland, Open Approach

  • 0C9930Z - Drainage of Left Parotid Gland with Drainage Device, Percutaneous Approach

  • 0C993ZX - Drainage of Left Parotid Gland, Percutaneous Approach, Diagnostic

  • 0C993ZZ - Drainage of Left Parotid Gland, Percutaneous Approach

  • 0C9B00Z - Drainage of Right Parotid Duct with Drainage Device, Open Approach

  • 0C9B0ZX - Drainage of Right Parotid Duct, Open Approach, Diagnostic

  • 0C9B0ZZ - Drainage of Right Parotid Duct, Open Approach

  • 0C9B30Z - Drainage of Right Parotid Duct with Drainage Device, Percutaneous Approach

  • 0C9B3ZX - Drainage of Right Parotid Duct, Percutaneous Approach, Diagnostic

  • 0C9B3ZZ - Drainage of Right Parotid Duct, Percutaneous Approach

  • 0C9C00Z - Drainage of Left Parotid Duct with Drainage Device, Open Approach

  • 0C9C0ZX - Drainage of Left Parotid Duct, Open Approach, Diagnostic

  • 0C9C0ZZ - Drainage of Left Parotid Duct, Open Approach

  • 0C9C30Z - Drainage of Left Parotid Duct with Drainage Device, Percutaneous Approach

  • 0C9C3ZX - Drainage of Left Parotid Duct, Percutaneous Approach, Diagnostic

  • 0C9C3ZZ - Drainage of Left Parotid Duct, Percutaneous Approach

  • 0C9D00Z - Drainage of Right Sublingual Gland with Drainage Device, Open Approach

  • 0C9D0ZX - Drainage of Right Sublingual Gland, Open Approach, Diagnostic

  • 0C9D0ZZ - Drainage of Right Sublingual Gland, Open Approach

  • 0C9D30Z - Drainage of Right Sublingual Gland with Drainage Device, Percutaneous Approach

  • 0C9D3ZX - Drainage of Right Sublingual Gland, Percutaneous Approach, Diagnostic

  • 0C9D3ZZ - Drainage of Right Sublingual Gland, Percutaneous Approach

  • 0C9F00Z - Drainage of Left Sublingual Gland with Drainage Device, Open Approach

  • 0C9F0ZX - Drainage of Left Sublingual Gland, Open Approach, Diagnostic

  • 0C9F0ZZ - Drainage of Left Sublingual Gland, Open Approach

  • 0C9F30Z - Drainage of Left Sublingual Gland with Drainage Device, Percutaneous Approach

  • 0C9F3ZX - Drainage of Left Sublingual Gland, Percutaneous Approach, Diagnostic

  • 0C9F3ZZ - Drainage of Left Sublingual Gland, Percutaneous Approach

  • 0C9G00Z - Drainage of Right Submaxillary Gland with Drainage Device, Open Approach

  • 0C9G0ZX - Drainage of Right Submaxillary Gland, Open Approach, Diagnostic

  • 0C9G0ZZ - Drainage of Right Submaxillary Gland, Open Approach

  • 0C9G30Z - Drainage of Right Submaxillary Gland with Drainage Device, Percutaneous Approach

  • 0C9G3ZX - Drainage of Right Submaxillary Gland, Percutaneous Approach, Diagnostic

  • 0C9G3ZZ - Drainage of Right Submaxillary Gland, Percutaneous Approach

  • 0C9H00Z - Drainage of Left Submaxillary Gland with Drainage Device, Open Approach

  • 0C9H0ZX - Drainage of Left Submaxillary Gland, Open Approach, Diagnostic

  • 0C9H0ZZ - Drainage of Left Submaxillary Gland, Open Approach

  • 0C9H30Z - Drainage of Left Submaxillary Gland with Drainage Device, Percutaneous Approach

  • 0C9H3ZX - Drainage of Left Submaxillary Gland, Percutaneous Approach, Diagnostic

  • 0C9H3ZZ - Drainage of Left Submaxillary Gland, Percutaneous Approach

  • 0C9J00Z - Drainage of Minor Salivary Gland with Drainage Device, Open Approach

  • 0C9J0ZX - Drainage of Minor Salivary Gland, Open Approach, Diagnostic

  • 0C9J0ZZ - Drainage of Minor Salivary Gland, Open Approach

  • 0C9J30Z - Drainage of Minor Salivary Gland with Drainage Device, Percutaneous Approach

  • 0C9J3ZX - Drainage of Minor Salivary Gland, Percutaneous Approach, Diagnostic

  • 0C9J3ZZ - Drainage of Minor Salivary Gland, Percutaneous Approach

  • 0C9M00Z - Drainage of Pharynx with Drainage Device, Open Approach

  • 0C9M0ZX - Drainage of Pharynx, Open Approach, Diagnostic

  • 0C9M0ZZ - Drainage of Pharynx, Open Approach

  • 0C9M30Z - Drainage of Pharynx with Drainage Device, Percutaneous Approach

  • 0C9M3ZX - Drainage of Pharynx, Percutaneous Approach, Diagnostic

  • 0C9M3ZZ - Drainage of Pharynx, Percutaneous Approach

  • 0C9M40Z - Drainage of Pharynx with Drainage Device, Percutaneous Endoscopic Approach

  • 0C9M4ZX - Drainage of Pharynx, Percutaneous Endoscopic Approach, Diagnostic

  • 0C9M4ZZ - Drainage of Pharynx, Percutaneous Endoscopic Approach

  • 0C9M70Z - Drainage of Pharynx with Drainage Device, Via Natural or Artificial Opening

  • 0C9M7ZX - Drainage of Pharynx, Via Natural or Artificial Opening, Diagnostic

  • 0C9M7ZZ - Drainage of Pharynx, Via Natural or Artificial Opening

  • 0C9M80Z - Drainage of Pharynx with Drainage Device, Via Natural or Artificial Opening Endoscopic

  • 0C9M8ZX - Drainage of Pharynx, Via Natural or Artificial Opening Endoscopic, Diagnostic

  • 0C9M8ZZ - Drainage of Pharynx, Via Natural or Artificial Opening Endoscopic

  • 0C9N00Z - Drainage of Uvula with Drainage Device, Open Approach

  • 0C9N0ZX - Drainage of Uvula, Open Approach, Diagnostic

  • 0C9N0ZZ - Drainage of Uvula, Open Approach

  • 0C9N30Z - Drainage of Uvula with Drainage Device, Percutaneous Approach

  • 0C9N3ZX - Drainage of Uvula, Percutaneous Approach, Diagnostic

  • 0C9N3ZZ - Drainage of Uvula, Percutaneous Approach

  • 0C9NX0Z - Drainage of Uvula with Drainage Device, External Approach

  • 0C9NXZX - Drainage of Uvula, External Approach, Diagnostic

  • 0C9NXZZ - Drainage of Uvula, External Approach

  • 0C9P00Z - Drainage of Tonsils with Drainage Device, Open Approach

  • 0C9P0ZX - Drainage of Tonsils, Open Approach, Diagnostic

  • 0C9P0ZZ - Drainage of Tonsils, Open Approach

  • 0C9P30Z - Drainage of Tonsils with Drainage Device, Percutaneous Approach

  • 0C9P3ZX - Drainage of Tonsils, Percutaneous Approach, Diagnostic

  • 0C9P3ZZ - Drainage of Tonsils, Percutaneous Approach

  • 0C9PX0Z - Drainage of Tonsils with Drainage Device, External Approach

  • 0C9PXZX - Drainage of Tonsils, External Approach, Diagnostic

  • 0C9PXZZ - Drainage of Tonsils, External Approach

  • 0C9Q00Z - Drainage of Adenoids with Drainage Device, Open Approach

  • 0C9Q0ZX - Drainage of Adenoids, Open Approach, Diagnostic

  • 0C9Q0ZZ - Drainage of Adenoids, Open Approach

  • 0C9Q30Z - Drainage of Adenoids with Drainage Device, Percutaneous Approach

  • 0C9Q3ZX - Drainage of Adenoids, Percutaneous Approach, Diagnostic

  • 0C9Q3ZZ - Drainage of Adenoids, Percutaneous Approach

  • 0C9QX0Z - Drainage of Adenoids with Drainage Device, External Approach

  • 0C9QXZX - Drainage of Adenoids, External Approach, Diagnostic

  • 0C9QXZZ - Drainage of Adenoids, External Approach

  • 0C9R00Z - Drainage of Epiglottis with Drainage Device, Open Approach

  • 0C9R0ZX - Drainage of Epiglottis, Open Approach, Diagnostic

  • 0C9R0ZZ - Drainage of Epiglottis, Open Approach

  • 0C9R30Z - Drainage of Epiglottis with Drainage Device, Percutaneous Approach

  • 0C9R3ZX - Drainage of Epiglottis, Percutaneous Approach, Diagnostic

  • 0C9R3ZZ - Drainage of Epiglottis, Percutaneous Approach

  • 0C9R40Z - Drainage of Epiglottis with Drainage Device, Percutaneous Endoscopic Approach

  • 0C9R4ZX - Drainage of Epiglottis, Percutaneous Endoscopic Approach, Diagnostic

  • 0C9R4ZZ - Drainage of Epiglottis, Percutaneous Endoscopic Approach

  • 0C9R70Z - Drainage of Epiglottis with Drainage Device, Via Natural or Artificial Opening

  • 0C9R7ZX - Drainage of Epiglottis, Via Natural or Artificial Opening, Diagnostic

  • 0C9R7ZZ - Drainage of Epiglottis, Via Natural or Artificial Opening

  • 0C9R80Z - Drainage of Epiglottis with Drainage Device, Via Natural or Artificial Opening Endoscopic

  • 0C9R8ZX - Drainage of Epiglottis, Via Natural or Artificial Opening Endoscopic, Diagnostic

  • 0C9R8ZZ - Drainage of Epiglottis, Via Natural or Artificial Opening Endoscopic

  • 0C9S00Z - Drainage of Larynx with Drainage Device, Open Approach

  • 0C9S0ZX - Drainage of Larynx, Open Approach, Diagnostic

  • 0C9S0ZZ - Drainage of Larynx, Open Approach

  • 0C9S30Z - Drainage of Larynx with Drainage Device, Percutaneous Approach

  • 0C9S3ZX - Drainage of Larynx, Percutaneous Approach, Diagnostic

  • 0C9S3ZZ - Drainage of Larynx, Percutaneous Approach

  • 0C9S40Z - Drainage of Larynx with Drainage Device, Percutaneous Endoscopic Approach

  • 0C9S4ZX - Drainage of Larynx, Percutaneous Endoscopic Approach, Diagnostic

  • 0C9S4ZZ - Drainage of Larynx, Percutaneous Endoscopic Approach

  • 0C9S70Z - Drainage of Larynx with Drainage Device, Via Natural or Artificial Opening

  • 0C9S7ZX - Drainage of Larynx, Via Natural or Artificial Opening, Diagnostic

  • 0C9S7ZZ - Drainage of Larynx, Via Natural or Artificial Opening

  • 0C9S80Z - Drainage of Larynx with Drainage Device, Via Natural or Artificial Opening Endoscopic

  • 0C9S8ZX - Drainage of Larynx, Via Natural or Artificial Opening Endoscopic, Diagnostic

  • 0C9S8ZZ - Drainage of Larynx, Via Natural or Artificial Opening Endoscopic

  • 0C9T00Z - Drainage of Right Vocal Cord with Drainage Device, Open Approach

  • 0C9T0ZX - Drainage of Right Vocal Cord, Open Approach, Diagnostic

  • 0C9T0ZZ - Drainage of Right Vocal Cord, Open Approach

  • 0C9T30Z - Drainage of Right Vocal Cord with Drainage Device, Percutaneous Approach

  • 0C9T3ZX - Drainage of Right Vocal Cord, Percutaneous Approach, Diagnostic

  • 0C9T3ZZ - Drainage of Right Vocal Cord, Percutaneous Approach

  • 0C9T40Z - Drainage of Right Vocal Cord with Drainage Device, Percutaneous Endoscopic Approach

  • 0C9T4ZX - Drainage of Right Vocal Cord, Percutaneous Endoscopic Approach, Diagnostic

  • 0C9T4ZZ - Drainage of Right Vocal Cord, Percutaneous Endoscopic Approach

  • 0C9T70Z - Drainage of Right Vocal Cord with Drainage Device, Via Natural or Artificial Opening

  • 0C9T7ZX - Drainage of Right Vocal Cord, Via Natural or Artificial Opening, Diagnostic

  • 0C9T7ZZ - Drainage of Right Vocal Cord, Via Natural or Artificial Opening

  • 0C9T80Z - Drainage of Right Vocal Cord with Drainage Device, Via Natural or Artificial Opening Endoscopic

  • 0C9T8ZX - Drainage of Right Vocal Cord, Via Natural or Artificial Opening Endoscopic, Diagnostic

  • 0C9T8ZZ - Drainage of Right Vocal Cord, Via Natural or Artificial Opening Endoscopic

  • 0C9V00Z - Drainage of Left Vocal Cord with Drainage Device, Open Approach

  • 0C9V0ZX - Drainage of Left Vocal Cord, Open Approach, Diagnostic

  • 0C9V0ZZ - Drainage of Left Vocal Cord, Open Approach

  • 0C9V30Z - Drainage of Left Vocal Cord with Drainage Device, Percutaneous Approach

  • 0C9V3ZX - Drainage of Left Vocal Cord, Percutaneous Approach, Diagnostic

  • 0C9V3ZZ - Drainage of Left Vocal Cord, Percutaneous Approach

  • 0C9V40Z - Drainage of Left Vocal Cord with Drainage Device, Percutaneous Endoscopic Approach

  • 0C9V4ZX - Drainage of Left Vocal Cord, Percutaneous Endoscopic Approach, Diagnostic

  • 0C9V4ZZ - Drainage of Left Vocal Cord, Percutaneous Endoscopic Approach

  • 0C9V70Z - Drainage of Left Vocal Cord with Drainage Device, Via Natural or Artificial Opening

  • 0C9V7ZX - Drainage of Left Vocal Cord, Via Natural or Artificial Opening, Diagnostic

  • 0C9V7ZZ - Drainage of Left Vocal Cord, Via Natural or Artificial Opening

  • 0C9V80Z - Drainage of Left Vocal Cord with Drainage Device, Via Natural or Artificial Opening Endoscopic

  • 0C9V8ZX - Drainage of Left Vocal Cord, Via Natural or Artificial Opening Endoscopic, Diagnostic

  • 0C9V8ZZ - Drainage of Left Vocal Cord, Via Natural or Artificial Opening Endoscopic

  • 0C9W000 - Drainage of Upper Tooth with Drainage Device, Open Approach, Single

  • 0C9W001 - Drainage of Upper Tooth with Drainage Device, Open Approach, Multiple

  • 0C9W002 - Drainage of Upper Tooth with Drainage Device, Open Approach, All

  • 0C9W0Z0 - Drainage of Upper Tooth, Open Approach, Single

  • 0C9W0Z1 - Drainage of Upper Tooth, Open Approach, Multiple

  • 0C9W0Z2 - Drainage of Upper Tooth, Open Approach, All

  • 0C9WX00 - Drainage of Upper Tooth with Drainage Device, External Approach, Single

  • 0C9WX01 - Drainage of Upper Tooth with Drainage Device, External Approach, Multiple

  • 0C9WX02 - Drainage of Upper Tooth with Drainage Device, External Approach, All

  • 0C9WXZ0 - Drainage of Upper Tooth, External Approach, Single

  • 0C9WXZ1 - Drainage of Upper Tooth, External Approach, Multiple

  • 0C9WXZ2 - Drainage of Upper Tooth, External Approach, All

  • 0C9X000 - Drainage of Lower Tooth with Drainage Device, Open Approach, Single

  • 0C9X001 - Drainage of Lower Tooth with Drainage Device, Open Approach, Multiple

  • 0C9X002 - Drainage of Lower Tooth with Drainage Device, Open Approach, All

  • 0C9X0Z0 - Drainage of Lower Tooth, Open Approach, Single

  • 0C9X0Z1 - Drainage of Lower Tooth, Open Approach, Multiple

  • 0C9X0Z2 - Drainage of Lower Tooth, Open Approach, All

  • 0C9XX00 - Drainage of Lower Tooth with Drainage Device, External Approach, Single

  • 0C9XX01 - Drainage of Lower Tooth with Drainage Device, External Approach, Multiple

  • 0C9XX02 - Drainage of Lower Tooth with Drainage Device, External Approach, All

  • 0C9XXZ0 - Drainage of Lower Tooth, External Approach, Single

  • 0C9XXZ1 - Drainage of Lower Tooth, External Approach, Multiple

  • 0C9XXZ2 - Drainage of Lower Tooth, External Approach, All