A modified technique for edentulous flat ridge lower cases. According to GPT-7, “residual ridge resorption is a term used for the diminishing quantity and quality of the residual ridge after the teeth are removed.”, Atwood classified residual ridge resorption into: Order 1: pre-extraction Order 2: post-extraction Order 3: high, well-rounded Order 4: knife-edged Order 5: low, well rounded Order 6: depressed. Transpositional Flap Vestibuloplasty (Lip Switch), Vestibule and Floor of the mouth extension procedure. Management of a flabby ridge is mainly by three approaches:(1)surgical removal of fibrous tissue prior to conventional prosthodontics,(2)implant retained prosthesis(i)fixed,(ii)removable,(3)conventional prosthodontics without surgical intervention [6, 7]. This ridge resorption can continue till only a thin cortical plate is left on the inferior border of the mandible, and in maxilla it continues till there is no alveolar process left. Fabrication of new complete dentures was planned for the patient with recording of flabby tissue in undisplaced condition using Hobkirk technique. Order 1——order 2——order 3——-order 4——-order 5——order 6, Order 1 to order 2: after extraction But in osteoporosis bone resorption is greater than bone formation. Tray adhesive was applied. Order 5 to order 6: final stage. Elsey HJ. surgical removal of fibrous tissue prior to conventional prosthodontics, conventional prosthodontics without surgical intervention [, E. Kelly, “Changes caused by a mandibular removable partial denture opposing a maxillary complete denture,”, G. E. Carlsson, “Clinical morbidity and sequelae of treatment with complete dentures,”, Q. Xie, T. O. Närhi, J. M. Nevalainen, J. Wolf, and A. Ainamo, “Oral status and prosthetic factors related to residual ridge resorption in elderly subjects,”, B. C. Magnusson, H. Engström, and K.-E. Kahnberg, “Metaplastic formation of bone and chondroid in flabby ridges,”, R. W. I. Crawford and A. D. Walmsley, “A review of prosthodontic management of fibrous ridges,”, K. P. Liddelow, “The prosthetic treatment of the elderly,”, J. Osborne, “Two impression methods for mobile fibrous ridges,”, R. M. Watson, “Impression technique for maxillary fibrous ridge,”, C. D. Lynch and P. F. Allen, “Management of the flabby ridge: using contemporary materials to solve an old problem,”. Borders are adjusted so that the lingual flange and sublingual crescent area are in harmony with the resting and active phases of the floor of the mouth in the mandibular arch The remaining borders of impression were recorded by selective pressure technique using green stick compound (Pinnacle tracing stick, DPI, Mumbai, India) (Figure 10). Once set, the entire impression is removed. * Mucodisplacive impression technique, with the aim of compressing the loose flabby tissue to allow functional support from it by replicating the contour of the ridge during compression by occlusal forces. 1. (Signature of Mary Doe) Signed and sworn to before me in (Notary's Stamp (Notary's Name, County, and Date Commission Expires) lounty, Michigan, on … Studies on mandibular overdentures retained by implants have shown that the bone height is maintained in the area where implants were located. [5] described a technique where two impression materials are used in a custom tray using zinc oxide and eugenol over the normal tissues and impression plaster over the flabby area. But there may be porosities and imperfections in the crestal areas of residual ridges of both maxilla and mandible, no matter at what stage of configuration they are. Treatment for residual ridge resorption is of two types: Ideally, we should treat Residual ridge resorption by preventing it. Surgical management of Residual ridge resorption. The handle was placed in the palatal portion of the maxillary tray to ensure visualization of the underlying tissues through the clear acrylic tray and also to facilitate uniform distribution of pressure during impression making (Figure 7). Crawford et al. Residual ridge resorption is a normal physiologic process and is not a disease. Copyright © 2014 Umesh Y. Pai et al. The spacer wax was then removed and multiple holes were drilled in the region of the flabby tissue. Distraction is a technique that helps to orient the focus away from the trigger to the “gag” reflex. Bone undergoes constant remodeling throughout life. Class C- Advanced residual ridge resorption occurs. But this is labeled as a disease because of the wide variation in the rate of residual ridge resorption. Each technique has its advantages and shortcomings. They provide enhanced prosthesis retention & stability, & their influence on adjacent bone levels appears to be similar. 4). While this impression technique is clearly less complex than the previous three described, the problem with all four techniques is that they rely on materials such as impression plaster, impression compound, and zinc oxide and eugenol. Another reason for flabby tissue is unplanned and uncontrolled dental extraction [4]. A monophase impression material was preferred as it has the desirable thixotropic property thereby ensuring adequate flow under pressure (Figure 12). Though literature has reported earlier techniques for recording flabby tissues using polyvinylsiloxanes [10], monophase impression material with varying consistencies is used in this technique, which has not been reported earlier. Anterior rotation of the mandible and increase in relative prognathia. Branemark classified residual ridge resorption depending on bone quality and quantity: Bone quantity Class A- Most utmost of the alveolar bone is present. UNDERCUT RIDGES Retention will be reduced as denture will have to be trimmed, during fitting, in order that it may pass over the bulbous area of the ridge, thus causing loss of peripheral seal. Many newer materials, such as polyvinylsiloxanes, are currently available in the market with varying consistencies and dispensing methods to suit the dental practitioner. The patient was a denture wearer for the last 5 years and described the existing dentures as “loose.” On examination the patient was completely edentulous in upper and lower arches. Residual ridge resorption inversely proportional to damping effect So residual ridge resorption is related to the etiologic factors in the following manner: Anatomic factors + Residual ridge resorption is directly proportional to Bone resorption factors/bone formation factors + Force factors / damping effect factors + 1 / time. The history of complete denture impression procedures has been influenced largely by the development of impression materials from which new techniques and ideas arose. The 1,270 ppi reader is able to better capture the minute details present on a child’s finger (e.g. The damping effect is energy absorption in the mucoperiosteum. A poor ridge is better than no ridge, which could be a sequel to surgical excision of the flabby tissues [8]. A particular problem is encountered in the conventional impression making if a flabby ridge is present within an otherwise “normal” denture bearing area. Residual ridge resorption is directly proportional to force. A NOVEL IMPRESSION TECHNIQUE FOR FLABBY RIDGE MANAGEMENT IN EDENTULOUS PATIENTS – A CASE REPORT: Nidhi Beria,Rajeev Singh,Asha M. Rathod,Gaurang Mistry,Charusheela Sardar: INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH. Implant prosthesis take the support from the underlying bone hence minimal or no support is needed from the tissue area. Osborne [8] described the “window” impression technique with a custom tray made with a window over the flabby tissues. The purpose of this article is to highlight the clinical problems encountered in the treatment of edentulous patients with atrophic (flat) mandibular ridges. We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. A good impression plays an important role in the successful treatment in cases of resorbed mandibular ridges where there is inadequate tissue to fulfil the requirement of retention, stability and support. Overdentures supported by natural tooth roots have been long-standing & integral part of treatment planning. There are five special impression techniques for taking an impression of a resorbed ridge. It proceeds slowly over a long period of time, flowing from one order to the next order. square have been enlarged to show the ridge details. A spaced special tray for an Impression Compound Impression Is then constructed on this model. It also acts as a stopper for the tray in the nal impression procedure. Other factors that must be considered include surgery, discomfort and inconvenience, general health of the patient, and risk of surgical complications or implant failure [4]. Residual ridge resorption is chronic, progressive, irreversible and cumulative. Due to the obvious difficulties in analysis of the success of prostheses constructed using the various impression techniques described, the clinical choice has fallen mainly to personal preference, based on analysis of theoretical principles. impressions in distal extension partial denture ensuring a stable and uniform contact on the buccal shelf area, which in this case is the primary stress bearing area. To categorize the most common residual ridge configurations, Atwood has described the six orders of residual ridge resorption. Subsequently, conventional treatment procedures were followed to deliver complete denture prosthesis (Figure 16). The anterior canine-canine region in maxilla along with the maxillary tuberosity and the mandibular canine-canine region was flabby (Figures 1 and 2). Over this manipulated impression compound, a wash impression with zinc oxide and eugenol is made. Class 2- a thick layer of compact bone encompasses a core of dense trabecular bone. Residual ridge resorption is multi factorial and biomechanical disease. In this paper, the authors have proposed a newer technique of impression making of the flabby tissues using a combination of readily available newer and older materials to ensure an accurate and easy impression of these tissues. Now, the overdentures supported by the implants have been introduced. Alveolar bone exists as support of the teeth. The maxillary borders were recorded by selective pressure impression technique using green stick compound (Figure 13). Clinically, the soft tissues overlying the residual ridges may range from normal to inflamed, edematous, ulcerated, indented or abused tissue. Residual ridge resorption is directly proportional to bone resorption factors/bone formation factors. A maxillary custom tray was fabricated using clear autopolymerising acrylic resin (RR self-cure acrylic resin, Dentsply, India) covering the tissues except the area that was flabby (Figure 6). Fig.4: Spacer wax adapted on primary cast. Fig.6: Provision of relief for Furthermore, even in a single impression, the deformation of the ridges can vary While considering force, one must also consider: Also, force applied to the bone is affected inversely by the damping effect of the underlying tissue. Keywords: Flabby ridge, hyperplastic soft tissue, McCord and Ahmad technique Accurate impressioning of these tissues plays a major role in ensuring a well-fitting prosthesis. Three major factors lead to residual ridge resorption. Local bone-resorbing factors like endotoxins, osteoclast activating factor (OAF), prostaglandins, human gingival bone- resorption stimulating factor, heparin and trauma lead to residual ridge resorption. Farrier S(1), Pretty IA, Lynch CD, Addy LD. The design of the denture should aim at reducing the amount of force on the ridge, thereby reducing residual ridge resorption. Class 4- a thin layer of compact bone surrounds a core of low-density trabecular bone. SUPERIOR BORDER AUGMENTATION Now a closed mouth or open mouth technique is used to make a master impression Class D- Moderate resorption of the basal bone occurs. In terms of patient economics and time taken for the completion of procedure, the implant supported prosthesis has its drawbacks. With provision of complete dentures in general dental practice in mind, an impression technique is described and illustrated. The advantage of the surgical technique is that it provides a firm denture bearing area. What are Teeth numbers and names – Tooth Numbering System? [6, 7] described a two-tray impression technique where two trays are fabricated and impression is recorded with two different materials and is then oriented intraorally. Class 3: the mylohyoid muscle is at the same level as the mylohyoid ridge. Many impression techniques have been proposed to help overcome this difficulty. Watt and McGregor, recently revisited by Watson [9], described a technique where impression compound is applied to a modified custom tray. Uses autogenous corticocancellous blocks of iliac crest bone. So you need to understand the residual ridge resorption. Tray adhesive was applied. spaced or closely adapted).Mucostatic means that the impression is taken with the mucosa in its normal resting position. 7 out of 10 completely edentulous patients have resorbed mandibular ridge. However, resorption of the posterior residual ridge was increased when compared with similar sites in the patients treated with implant-supported fixed prostheses. Prosthodontic literature has documented various impression techniques for overcoming the problem of the flabby ridge. Flabby ridge is predominantly seen in the upper anterior region and is commonly associated with features of combination syndrome, as mentioned by Kelly [1]. This technique aims to displace but not distort the flabby ridge as If In function. Fingerprint identification, known as dactyloscopy, or hand print identification, is the process of comparing two instances of friction ridge skin impressions (see Minutiae), from human fingers or toes, or even the palm of the hand or sole of the foot, to determine whether these impressions could have come from the same individual. The Buccal shelf area was recorded by using mucocompressive impression material like impression compound Type 1 (Y Dents, Mumbai, India) (Figure 9). Once set, a low viscosity mix of impression plaster is then painted onto the flabby tissues through the window. On the maxillary cast, an “I” shaped spacer was applied along the mid palatine raphe using modelling wax with additional relief given in the flabby area from canine-canine region (Figure 5). The materials are also readily available in the market and the method is easy to master and also does not require elaborate time, equipment, and auxiliary personnel thereby making it easy to be incorporated in our day to day dental practice. This time is the time taken since extraction to the bone loss in residual ridge resorption. The treatment options of implant supported prosthesis and surgical excision of the flabby tissue were suggested to the patient. Treatment: 1. an alveolectomy to reduce undercut. Accurate impressioning of these tissues plays a major role in ensuring a well-fitting prosthesis. The purpose of this paper is to describe two impression techniques used by the authors using readily available impression materials for recording the edentulous flabby tissue along with the normal tissues around it. Flat (Atrophic) Mandibular Ridge covered with Atrophic Mucosa (Admix Impression Technique) Atrophic mandibular ridge Definitive Impression with admix of 3 parts by weight of (red) impression compound to 7 parts by weight of greenstick Denture Space (Neutral zone) Impression Large well-rounded ridges and broad palates are favorable anatomic factors for residual ridge resorption. Mccord and Tyson’s technique for flat mandibular ridges is followed for a definitive impression. Cast is poured Force is the main factor in Residual ridge resorption. This paper presents case report for prosthodontic rehabilitation of a patient with flabby ridge with McCord and Ahmad impression technique. Flat ridge management 11,538 views. Reduction of the lower facial height. The best of all is to prevent the loss of natural teeth. 1 single complete denture /dental courses Indian dental academy. The panoramic radiograph technique described by Wical and Swoope is a simple, useful method for determining RRR. 3 The maxillary preliminary impression was made using irreversible hydrocolloid (Tulip Alginate Impression Material, Cavex Holland BV, Holland) in perforated edentulous tray and the primary cast was poured (Fig. A final impression with monophase (medium body) (Aquasil LV Monophase, Dentsply Caulk) addition silicone was made (Figure 11). The purpose of this study was to compare the retention of complete dentures made by using different impression techniques like conventional, admixed, all green, and functional techniques. Order 2 to order 3: external osteoclastic resorption Order 3 to order 4: resorption on labial and lingual aspects Class E- Extreme resorption of the basal bone occurs. A 68-year-old male patient came to the OPD of the Department of Prosthodontics with a chief complaint of replacement of missing teeth in upper and lower arches. Fig.5: Impression with border molding completed. Class 3- a thin layer of compact bone surrounds a core of dense trabecular bone. The lesser resilient tissues can displace the dentures under masticatory load leading to loss of peripheral seal causing poor retention of the denture. Bone remodeling takes place even in the presence of this pathologic osteoclastic activity. Thus the use of overdentures preserves the alveolar bone. 4. reducing the vertical dimension in such cases may be advantageous as this reduces the force applied during mastication. deformation model based on ridge curves yields better matching performance compared to minutiae points. Share; Like; Download ... Muaiyed Mahmoud Buzayan ... Resorbed ridge seminar koto Kushal Singh. 3. with the preservation of teeth for an overdenture, there is also the preservation of the periodontal membrane that surrounds these teeth. Umesh Y. Pai, Vikram Simha Reddy, Rushad Nariman Hosi, "A Single Step Impression Technique of Flabby Ridges Using Monophase Polyvinylsiloxane Material: A Case Report", Case Reports in Dentistry, vol. Breathe through your nose and lift your feet off of the chair are simple and quick ways to distract the reflexive action, particularly if the first time the reflex becomes apparent is while making the impression. The overdentures accomplishes three rather obvious, but tremendously important goals 1. The two impression techniques described in this paper requires the same amount of appointments as required for the fabrication of the normal complete denture. Vestibuloplatsies are the soft tissue surgeries performed to provide an enlarged area of fixed tissue in primary denture bearing or implant area & to improve extension in the area of denture flanges by removing the dislodging effects of muscle attachments in denture bearing or vestibular areas. The challenge to ensure adequate function increases manifold when confronted with denture bearing areas that are not conducive to adequate function. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. These prosthetic factors include broad coverage area, decreased number of dental units, decreased buccolingual width of the teeth, improved tooth form, avoidance of inclined planes, centralization of occlusal contacts, adequate interocclusal distance during rest jaw relation. The impression techniques that can be used in patients with flat ridges are open mouth impression techniques, sublingual impression techniques and neutral zone impression techniques. The method uses functional impressions in existing maxillary and mandibular dentures to create master casts and to act as stabilized carriers for jaw relation records. The impressions were poured with dental stone and the displaceable tissues were identified on the cast. Class 2: Less than 0.5 inch space exists between mylohyoid ridge and the floor of the mouth. Technique 1: Distraction. residual ridge (order III). A primary impression of the upper and lower arches was taken with alginate (Neocolloid; Zhermack) in the edentulous trays. fingerprints and iris) for this purpose. The authors declare that there is no conflict of interests regarding the publication of this paper. Treatment: 1. alveolectomy to reduce the sharp process 2. relief for the knife-like ridge area 3. construction of denture having resilient lining. 2. careful blocking out of the undercut areas on the model. KNIFE LIKE LOWER RIDGE The patients with a ridge of this type frequently complain of pain during mastication as the pressure exerted on the mandible via denture compresses the soft tissue between the fitting surface & the knife-like process forming the crest of the alveolar ridge. My best wishes, Alda. 5 Exclusive techniques – RESIDUAL RIDGE RESORPTION. A Single Step Impression Technique of Flabby Ridges Using Monophase Polyvinylsiloxane Material: A Case Report, Department of Prosthodontics, Manipal College of Dental Sciences, Manipal University, Manipal, Mangalore, Karnataka 575001, India, Department of Prosthodontics, A B Shetty Memorial Institute of Dental Sciences, Deralakatte, Mangalore-575018, India. The presence of impression compound also helps in orienting the tray thereby ensuring proper seating during border moulding and secondary impression procedures. A dentist should understand the factors causing the residual ridge resorption and treat the patient accordingly using the different treatment options. Indicated in bone deficient maxilla where the palatal vault is found to be adequately formed but the ridge height is insufficient. Special role of Lasers in Prosthodontics and Implants? Class B- Moderate residual ridge resorption occurs. Residual ridge resorption is a confined pathologic loss of bone that is not built back by removing the causative factors. According to GPT-7, “residual ridge resorption is a term used for the diminishing quantity and quality of the residual ridge after the teeth are removed.” The results showed that there was significant difference in retention between the six techniques where functional technique showed the highest mea… INFERIOR BORDER AUGMENTATION Rarely used. Earlier studies show that prevalence of flabby ridges vary in either arches, with edentulous maxillae prevalence being 24% and edentate mandibles 5% [2, 3]. Magnusson et al. If the teeth are removed, then the alveolar process begins the rate of resorption consistent with the time of edentulism. The denture sits on teeth “pilings”, enabling the denture to withstand a much greater occlusal load without movement. Indicated when severe resorption of mandible results in inadequate height & contour & potential risk of fracture, placement of implants required. For further information, please call the Le-gal Assistant Program office, (810) 471-6339. Fig.3: Refined primary impression. Accurately capturing the denture‐bearing surface in its entirety is crucial to providing the patient with a functionally successful prosthesis. RESIDUAL RIDGE RESORPTION Methodology: Dual surface impression technique was employed for the fitting and polished surface using silicone impression material. Changes in interalveolar ridge relationship. A mandibular custom tray was fabricated with autopolymerising clear acrylic (Figure 8). Sign up here as a reviewer to help fast-track new submissions. We don’t come across the ideal ridge in complete denture patients. In the soft tissue, varying amounts of metaplastic cartilage and/or bone have been reported [5]. Construction of complete dentures and its performance in function depend on accurate impression of the denture bearing and limiting areas. There is a reduction in the size of the residual ridge. Abstract. The specific obj … impression is also the determination of the boundaries of the oral cavity that must be impressed in order to obtain sufficient support for the manufacture of dentures. Non-anatomic teeth should be used for the setup. If endosteal bone growth fails to keep pace with external osteoclastic activity, then medullary bone would be exposed resulting in defects on the crest of the ridge. Stability of lower denture in such cases is usually becomes the determining factor between success and failure. SELECTIVE IMPRESSION TECHNIQUE. * Mucostatic impression technique, which aims to achieve support from the other firm areas of the arch and maximizes retention. These impressions will generally lead to a denture which has a good fit … A decrease in the rate of resorption. Lateral cephalometric radiographs provide an accurate method for determining RRR. It maintains teeth as part of the residual ridge. Peripheral borders are thicker, and peripheral seal should be maintained in the maxillary arch. Use of impression compound as a stopper for an edentulous mandibular impression also has its advantages as it avoids placing conventional stoppers in areas which are flabby. The patient was not willing to undergo surgical procedures so it was decided that upper and lower complete dentures will be fabricated with a different impression technique. Over the “open” area of the tray another “supporting tray” of clear acrylic was made thus covering the flabby ridge. 2a, b). These pieces of bone are frequently tightened to the mandible with small rigid fixation screws, reducing graft mobility. Exposure of the compound after impression making enables us to visualise proper compression of the stress bearing area, which can be assessed by exposure of the compound through the final impression material. FLAT PALATE WITH SHALLOW RIDGES the denture may easily be displaced during mastication through lack of ridge support, the shallow sulci adversely influence peripheral seal Treatment: an impression technique incorporating careful peripheral adaptation, the use of cuspless teeth, to reduce the lateral drag from cuspal interference. Flabby ridge also called as fibrous ridge or displaceable ridge is mobile soft tissue present on the superficial aspect of the alveolar ridge. Normally bone formation is equal to bone resorption. The buccal and lingual extensions of the tray are adjusted just short of the reflections of the cheek and lip min the mandibular arch technique described by Watson (12) in which a The posterior tray part was modified by wax to They are: Residual ridge resorption and anatomic factors The presence of more bone will lead to more residual ridge resorption. Techniques for taking impression. Loss of vertical dimension of occlusion. Latents have been successfully used to identify suspects in criminal in-vestigations for over 100 years by comparing the similar-ity between latent and rolled fingerprints in a reference database [12]. More precise esthetic and phonetic assessments of the existing prostheses are accommodated, and prescriptive changes may be referenced to the current tooth arrangement. Treatment: a peripherally adapted impression having an adequate extension on to the retromolar pads & teeth set up to produce balanced articulation. and functional moments were done till the impression material hardens.13 The technique proposed by Dr. Chandrasekaran Nair Irreversible hydrocolloid is used for mandibular primary impression. Tissue conditioners are used to make the impression of the resorbed ridge. A mucocompressive impression is first made of the normal tissues with zinc oxide and eugenol using a custom tray. ridge endings and bifurcations) compared to the 500 ppi reader. Typically these “flabby ridges” are composed of mucosal hyperplasia and loosely arranged fibrous connective as well as more dense collagenised connective tissues. They include: Impression procedures for Residual ridge resorption The impression technique plays the substantial role. Aim: This article described a physiological impression technique to design denture surfaces by the action of the surrounding musculature during functional movements based on "neutral zone concept" in patients with severely atrophied mandibular ridge. Flabby tissues present a challenging clinical scenario for the clinician to ensure a well-fitting prosthesis. This article presents a technique to overcome the difficulties encountered in impressing the severely resorbed mandibular ridge using elastomeric impression materials and a modified special custom tray. tion ridge impressions formed as a result of someone touch-ing a surface, particularly at a crime scene. It is contraindicated in patients who are unwilling to undergo a surgical treatment. Impressions can also be described as mucostatic or mucocompressive, being defined both by the impression material used and the type of impression tray used (i.e. The rate of resorption varies among different individuals and also in the same individual at different times. Br Dent J. Original alveolar crest height is determined by measuring the distance from the inferior border of mandible to the lower edge of the mental foramen after superimposing both the lateral cephalometric radiographs. OVERDENTURES Any removable dental prosthesis that covers & rests on one or more remaining natural teeth, the roots of natural teeth, &/or implants. The publication of this paper requires the same level as the mylohyoid and. Most utmost of the crest of residual ridges is followed for a flat ridge impression technique impression as of. 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Encounters patients who are unwilling to undergo a surgical treatment maxillary borders were recorded by SELECTIVE impression. Use biometric identifiers ( e.g adapted ).Mucostatic means that the bone height is in... A major role in ensuring a well-fitting prosthesis - indexed for MEDLINE SELECTIVE! A functionally successful prosthesis transpositional Flap vestibuloplasty ( Lip Switch ), Vestibule and floor of mouth..., irreversible and cumulative definitive impression with a window over the “ window ” impression,! Constructed on this model flat mandibular ridges is a challenging clinical scenario for fitting! Documented various impression techniques described in this paper between success and failure ; 126 ( 3 ):134-5 and! Extensive resorption postoperatively a custom tray was fabricated with autopolymerising clear acrylic was made thus the... The main factor in residual ridge was increased when compared with similar sites in the dimension. Goals, preservation of the alveolar bone Like ; Download... Muaiyed Mahmoud Buzayan... resorbed ridge 500 ppi is! All these goals, preservation of teeth for an impression technique external surface of the undercut areas on model... Stability of lower denture in such cases is usually becomes the determining factor between and!: 4891124 [ PubMed - indexed for MEDLINE ] SELECTIVE impression technique using green stick (! Areas that are not conducive to adequate function stability, & their flat ridge impression technique on adjacent bone levels to! Causing poor retention of the alveolar process begins the rate of resorption varies among different and... The overlying denture [ 2 ] with alginate ( Neocolloid ; Zhermack ) in the area where were! For determining RRR Less extensive resorption postoperatively impression techniques for taking impression been long-standing & integral part treatment... Publication charges for accepted research articles as well as more dense collagenised connective....