{"id":234,"date":"2025-09-02T14:08:28","date_gmt":"2025-09-02T06:08:28","guid":{"rendered":"https:\/\/drselenekuo-dev.ieon.tech\/?p=234"},"modified":"2026-01-06T14:54:43","modified_gmt":"2026-01-06T06:54:43","slug":"%e7%89%99%e5%86%a0%e5%a2%9e%e9%95%b7%e8%a1%93","status":"publish","type":"post","link":"https:\/\/drselenekuo.com\/en\/2025\/09\/02\/%e7%89%99%e5%86%a0%e5%a2%9e%e9%95%b7%e8%a1%93\/","title":{"rendered":"6. Crown Lengthening"},"content":{"rendered":"<ul class=\"wp-block-list\">\n<li>What is crown lengthening?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">What is \"crown augmentation surgery\"? To put it simply, it is to modify the proportion of gums and crowns to solve the problem of aesthetic disharmony caused by the height and position gap of gums on each tooth in the oral cavity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to improving the appearance of the tooth, another important application of \"crown augmentation\" is that when severe tooth decay causes the cavity to be too deep to be filled, or when the tooth is broken due to trauma, and the remaining tooth structure is too little exposed outside the gums to make braces, then \"crown augmentation\" must be used in combination with the treatment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Not all fractured and chipped teeth can be treated with this procedure. A professional periodontist will conduct a complete assessment based on the damaged supporting tissue of the patient's gums, the average height of the adjacent teeth, and the overall condition of the oral cavity to find the most suitable treatment method for the patient.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X adaptation conditions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\"Crown lengthening\" is not suitable for everyone. Only those cases require this surgery.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common situations that require crown augmentation include:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. Too deep tooth decay makes treatment difficult<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. The tooth is broken too deep<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. The edge of fixed dental prosthesis is close to the bone, causing periodontal inflammation and damage to the alveolar bone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. Teeth are not fully erupted<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5. The height of the gums in the anterior teeth area is inconsistent<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">6. Aesthetic problems caused by excessive exposure of gums when smiling<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X Tooth decay is too deep<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Indications of crown lengthening<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\"Tooth decay is too deep, making treatment difficult\": When tooth decay has invaded the tooth structure below the gums, it is likely to cause inflammation of the gums, and even cause inflammation and resorption of the underlying alveolar bone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the cavity is too deep, not only will it be difficult to remove the cavity, but when the cavity is filled, there will be contamination from saliva, blood, etc., making it impossible to properly fill it. In order to achieve a thorough treatment, the cavity must be completely exposed. In this case, the \"crown augmentation\" treatment must be performed first.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation surgery<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Why is a crown augmentation procedure needed if the tooth is too deeply fractured?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When teeth are broken due to external forces (such as car accidents, falls, impacts, etc.) or severe tooth decay, and when the dentine defect is too large and affects functionality and appearance, fixed dental prosthesis must be used for reconstruction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since fixed dental prosthesis must be placed on intact dentition, the edges will be completely closed, thereby reducing the possibility of tooth decay and fracture in the future. At this time, \"crown growth\" must be used first to expose the intact tooth structure to facilitate subsequent denture production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, not all broken teeth can undergo crown augmentation surgery. The periodontist will evaluate the length of the tooth root and the overall periodontal condition. If the fracture is too deep, crown augmentation surgery cannot be performed.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X The tooth has not erupted<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Why does \"tooth not fully erupted\" require crown augmentation surgery?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the anterior tooth area, due to abnormal tooth eruption, the teeth are covered by excessive periodontal tissue. Not only does it make it difficult to maintain periodontal health, but it also causes aesthetic problems in the anterior tooth area because it looks short and shallow visually, which in turn affects mental health.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\"Tooth crown augmentation\" can fully reveal teeth that have not fully erupted and improve aesthetic problems.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X fixed dental prosthesis edge adjacent to bone<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Why \"fixed dental prosthesis edge is close to the bone\" and crown augmentation surgery must be used will be explained in detail.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the edge of the fixed dental prosthesis goes too deep into the gums, the dentures will not be able to fit perfectly with the natural teeth, and it will also make it difficult to clean the mouth, which will increase the chance of bacterial growth, lead to periodontal inflammation, and in severe cases, even damage to the alveolar bone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crown augmentation can appropriately expose the edges of dentures, reducing discomfort caused by friction between gums and dentures and reducing the chance of periodontal inflammation.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown Augmentation X Gingival Height Inconsistency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Why does \"gum height inconsistency\" require crown augmentation surgery?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\"Gum height inconsistency\" is divided into congenital and acquired. The gums are raised or lowered due to disease (gingival recession, gingivitis, periodontitis or tooth root decay, etc.), resulting in inconsistent overall height of the gums. The asymmetry of facial proportions and smile beauty can be clearly felt visually.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the gum is too high and the amount of exposed teeth is insufficient, crown augmentation surgery must be performed to trim the gum and bone downward so that the smile curve can be exposed normally.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown Augmentation X Aesthetic Issues<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Why is crown augmentation necessary for \"excessive exposure of gums when smiling\"?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The aesthetic problem caused by \"excessive exposure of gums when smiling\" is also called gummy smile or gummy smile. It is particularly obvious in the aesthetic area of \u200b\u200bthe front teeth. Patients who suffer from related problems will involuntarily cover their smiles with their hands when laughing, or try not to laugh as much as possible, which also indirectly affects the psychological level.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Some people will feel low self-esteem, depressed, etc., which will affect their interpersonal relationships and even lead to mental illness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The causes of gummy smile can be divided into: excessive downward growth of the maxillary bone, excessive coverage of the gums, and compound problems of the gums and the maxillary bone.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Smiling Gums X Aesthetic Problems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The \"ideal smile curve\" in oral aesthetics means that when smiling, the white crowns of the upper front teeth are almost completely exposed, and the gums are exposed within 2mm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The severity of gum exposure during laughter can be divided into:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Mild gummy smile: The gums of the upper front teeth are exposed more than 2mm. (The proportion is less than 25% of the length of the white crown)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Severe gummy smile: The proportion of exposed gums is equal to the length of the white crown.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Different levels of smile gums require different treatments, so let your dentist do a complete diagnostic evaluation to properly address the problem! &#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The main causes of smiling gums are: muscle problems, upper lip problems, tooth problems, and bone problems<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Muscle problem: When smiling, the upper row of gums is excessively exposed due to excessive pulling force of the Levator labii superioris muscle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Upper lip problem: Because the upper lip is too thin, too much gum area is exposed when smiling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Dental problems: Excessive tooth proliferation will not only make the teeth look shorter visually, but also cause gum disease due to difficulty in cleaning the teeth.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211; Bone problem: The problem of smile gums comes from the position of the bones. The reason is that the maxillary bone is over-developed in the vertical direction. Although the teeth are of normal size, when you laugh, the gums will be exposed too much.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Smiling Gum X Treatment Methods<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Current treatments for gummy smiles include gum surgery, orthognathic surgery, Botox and filler injections, lipofilling, and upper lip repositioning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Gum surgery: crown augmentation, gingivectomy. Excessive tooth proliferation or passive tooth eruption, resulting in teeth that are too short, make the smile curve look incorrectly proportioned, and affect the appearance. Crown augmentation or gingivectomy can be used to reshape the gums and improve the length-to-width ratio of the teeth, and at the same time improve the smile gum problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Orthognathic surgery: Smiling gums caused by overdevelopment of the maxillary bone in the vertical direction are bone problems. Usually doctors will recommend patients to undergo orthognathic surgery to improve them based on professional comprehensive assessment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Before orthognathic surgery, oral surgeons will use X-rays, tomography and other methods to check the development and movement of facial bones and teeth, and accurately calculate the direction, distance, angle and angle of bone movement. Then they will cut the bones of the upper and lower jaws, rearrange them and fix them. In addition to treating smile gum problems, they will also solve bite abnormalities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Injection of Botox and fillers: Inject Botox and fillers into the levator labii muscle group to improve the tension of the levator labii muscles and reduce the proportion of gums exposed when laughing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using this method may cause the smile to appear stiff and unnatural after injection, and the improvement will only last for a short period of time, up to 6 months.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Fat replacement: Use autologous fat to improve the thickness of the soft tissue of the upper lip.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Lip repositioning surgery: By adjusting the depth of the vestibule inside the lip, it limits the contraction of the smile muscles and reduces the proportion of gums exposed when smiling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\"Smiling gums\" or \"gummy smiles\" are not necessarily caused by a single cause. Sometimes it may be necessary to combine two or more treatment methods. The treatment methods for different levels of smile gums are different, so let the dentist do a complete diagnostic evaluation to correctly solve the problem!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X What will happen if you don\u2019t do it?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you should receive \"Crown Augmentation\" treatment but do not do it immediately, it may lead to the following situations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Alveolar bone is damaged by bacteria and is not treated in time to reduce the bacterial load, resulting in alveolar bone loss<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-The gums continue to be damaged by infection and recede<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">- Red and swollen gums<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-The dentures do not fit tightly, and secondary tooth decay causes the dentures to become loose.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-The lifespan of dentures is greatly shortened &#8221;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown Augmentation X Alveolar Bone Loss<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">-Loss of alveolar bone: The atrophy of alveolar bone is irreversible. Once it is damaged, it will lead to inflammation and absorption. Without treatment, it is likely to become severe periodontitis. In severe cases, it may lead to tooth loss, making subsequent treatment complicated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once the alveolar bone is completely lost, the gums will also shrink significantly. At this time, it is very likely that even denture treatment will not be possible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">- Continuous destruction of periodontal soft and hard tissues: When periodontal tissue is eroded by bacteria and pathological changes occur, and no immediate treatment is provided, allowing bacteria to progressively invade and destroy the periodontal tissue, which will first inflame the entire periodontal tissue, and then evolve into gingivitis and periodontitis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once the periodontal tissue becomes inflamed, a peculiar smell will appear in the mouth, followed by bleeding, pus, etc. If it is not treated actively, you may face the fate of surgery and tooth extraction.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X Gum redness and swelling<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you should undergo \"Crown Augmentation\" treatment but do not do it, you may also face the problem of \"red and swollen gums\"<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Red and swollen gums: Healthy gums will appear pink. If they appear deep red or blue-purple, it means there is likely to be a disease, such as gum inflammation or periodontal disease.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you should receive treatment but do not receive it, coupled with poor oral hygiene, the red and swollen gums will worsen, and crown augmentation surgery cannot be performed at this time.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown augmentation X Dentures do not fit tightly and shorten their lifespan<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you should undergo \"crown augmentation surgery\" but do not actively treat it, it may also cause \"the dentures to not fit tightly, secondary cavities to cause the dentures to loosen\" and \"the life of the dentures to be greatly shortened\".<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether it is removable dentures or fixed dental prosthesis, it must have sufficient grip. When the teeth are too short, it is easy for the dentures to not have enough grip, causing the dentures to loosen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When dentures become loose, it is easy for bacteria to breed and food residue to remain in the gaps in the mouth. If bacteria continue to breed and the mouth is not cleaned properly, the probability of secondary tooth decay will increase.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Through crown augmentation surgery, the crown covered by the tooth flesh and bone is exposed to reach a certain length required for the denture, thereby stabilizing the denture and preventing the denture from loosening.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crown Augmentation X Preoperative Assessment<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Before the \"Crown Augmentation Surgery\" surgery, the overall condition of the oral cavity, whether there are cavities, whether there are broken teeth, the health status of the dentures, etc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">-Clinical examination: Use circumferential X-rays, periapical X-rays (PA), tomography, etc. to confirm the overall oral condition as well as the shape, length, defect range, and relative position of the alveolar bone, formulate a patient-specific treatment plan, and evaluate whether the patient is suitable for \"crown augmentation\" treatment.<\/p>","protected":false},"excerpt":{"rendered":"<p>What is \"crown augmentation surgery\"? To put it simply, it is to modify the proportion of gums and crowns to solve the problem of aesthetic disharmony caused by the height and position gap of gums on each tooth in the oral cavity.<\/p>","protected":false},"author":1,"featured_media":227,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-234","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>6. \u7259\u51a0\u589e\u9577\u8853 - Sanli Aesthetic Dental Clinic<\/title>\n<meta name=\"description\" content=\"Learn about 6. Crown Lengthening from Sanli Aesthetic Dental Clinic in Taipei. 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